Automatic Measuring Device for Radial Clearance of Rolling Bearings

Abstract

The present invention provides an automatic measuring device for the radial clearance of a rolling bearing, which includes a test bench frame and columns. A lifting platform is slidably arranged between the columns, and a displacement sensor is arranged on the lifting platform. The test bench frame is provided with a fixed base and a driving component movably arranged in the fixed base. The driving component is connected with a matching tooling through a tooling connecting seat, and the matching tooling is used to install the bearing to be measured so that its radial direction is located at the detection end below the displacement sensor. An electric cylinder is arranged on the bottom surface of the test bench frame, and a force sensor driven by the electric cylinder. The force sensor and the displacement sensor cooperate to detect the radial clearance of the bearing to be measured. An elastic component is arranged between the force sensor and the tooling connecting seat, which can provide elastic force or tensile force to the bearing to be measured. The radial clearance is detected in an electric way, reducing the instability of the original pneumatic way, reducing fluctuations, and eliminating the need for operators to continuously operate it.

Description

Technical Field

[0001] The present invention relates to an automatic measuring device for the radial clearance of a rolling bearing. Background Art

[0002] In the daily application process, the radial clearance and radial stiffness of a rolling bearing have an important impact on the actual use, especially in high-precision equipment. To ensure the bearing state during use, it is necessary to strictly control the radial clearance and radial stiffness of the bearing. If the parameters are abnormal, it is extremely easy to cause damage to high-precision equipment and result in great economic losses. Therefore, the radial clearance and radial stiffness need to be strictly controlled and accurately measured.

[0003] In the actual detection process, factories usually use pneumatic equipment to detect the radial displacement and radial stiffness. This operation cannot fully liberate manual labor, and the air pressure fluctuation will cause the test load to fluctuate, resulting in poor indication stability. Summary of the Invention

[0004] Aiming at the deficiencies of the prior art, the present invention provides an automatic measuring device for the radial clearance of a rolling bearing.

[0005] To achieve the above object, the present invention provides an automatic measuring device for the radial clearance of a rolling bearing, including a test bench, two columns arranged on the test bench, a lifting table is slidably arranged between the two columns, and a displacement sensor for detecting the bearing to be measured is arranged on the lifting table; the test bench is provided with a fixed base and a driving component movably arranged in the fixed base, the fixed base is provided with a channel for the vertical movement of the driving component, the driving component is connected with a matching tooling for installing the bearing to be measured through a tooling connecting seat, and the matching tooling installs the bearing to be measured so that its radial direction is located at the detection end of the lower end of the displacement sensor; an electric cylinder for cooperating with the driving component to radially load the bearing to be measured is arranged on the bottom surface of the test bench, the driving component includes a force sensor driven by the electric cylinder and located on the same vertical line as the displacement sensor, and the force sensor and the displacement sensor cooperate to detect the radial clearance of the bearing to be measured; an elastic component is arranged between the force sensor and the tooling connecting seat, and the elastic component can provide elastic force or tensile force to the bearing to be measured when the electric cylinder drives the force sensor to move.

[0006] The beneficial effects of the present invention are as follows: By adjusting the height of the upper lifting table, when the displacement sensor is in a suitable position, stop the height adjustment, adjust the displacement sensor to make it contact with the upper end face of the matching tooling. The force sensor rises uniformly under the drive of the electric cylinder and compresses the elastic component until the indication value of the force sensor reaches the set value of the scheme and then stops moving. At this time, the indication value of the displacement sensor is △X1. The force sensor descends uniformly under the drive of the electric cylinder and stretches the elastic component until the indication value of the force sensor reaches the set value of the scheme and then stops moving. At this time, the indication value of the displacement sensor is △X2. The absolute value of the difference between the two detections of the displacement sensor is the radial clearance of the bearing. The elastic component can make the bearing under test be stably stressed, and the pressure or tension changes evenly, improving the detection accuracy. It can be used for displacement or stiffness measurement of a series of bearings that can bear radial loads, such as deep groove ball bearings, four-point contact ball bearings, cylindrical roller bearings, etc. It has a series of advantages such as a stable measurement system, a wide variety of test types, and simple measurement operations. The present invention has practicality. By using an electric method to detect the radial clearance of the bearing, it reduces the instability of the original pneumatic method, makes it change stably during the detection process, reduces fluctuations, and the electric method can make it automatically measure without the operator constantly operating it, reducing the time cost. It is driven by an electric cylinder for measurement, automatically measures, is convenient to operate, and can simply, quickly, accurately, and precisely measure the radial clearance of the rolling bearing.

[0007] Further, the elastic component includes a compression spring disposed in the channel and adapted to the inner wall of the channel, and a tension spring disposed in the central hole of the compression spring. One end of the tension spring is connected to the tooling connection seat, and the other end is provided with a threaded cap. The force sensor is threadedly connected to the threaded cap. The compression spring is clamped between the upper end face of the threaded cap and the lower end face of the tooling connection seat. The compression spring abuts against the upper end face of the threaded cap and the lower end face of the tooling connection seat under the upward push of the force sensor. A connecting rod extends downward from the lower end of the tooling connection seat. A guiding block with a guiding direction along the movement direction of the force sensor is disposed on the side wall of the connecting rod. A guiding sleeve with a waist-shaped hole having a length direction consistent with the guiding direction of the guiding block is disposed between the guiding block and the tension spring. The tension spring is slidably disposed on the guiding block through the guiding sleeve. The guiding block is located in the waist-shaped hole. The tension spring generates a pulling force under the downward pull of the force sensor through the up-and-down sliding limit between the waist-shaped hole and the guiding block.

[0008] By adopting the above technical solution, during the upward movement of the electric cylinder with the force sensor loaded, the edge of the threaded nut provided on the force sensor gradually contacts the compression spring. During the upward movement of the compression spring, the other side abuts against the tooling connection seat. From this moment on, elastic force is generated during the further upward movement of the compression spring. When the force sensor shows a value, it indicates that the electric cylinder contacts the inner ring of the bearing through the compression spring and the tooling connection seat. At this moment, the measurement system is formed. At this time, the displacement sensor automatically resets to measure the radial clearance of the bearing. And during the compression process of the compression spring, the tension spring slides on the connecting rod through the cooperation of the guide block and the guide sleeve ring, so that no acting force is generated during the upward movement and no resistance is generated by compression, reducing the factors that reduce the detection accuracy during the upward movement of the force sensor, thereby improving the detection stability and detection accuracy. Lower the electric cylinder push rod at a uniform speed. After returning to the initial position, the compression spring separates from the tooling connection seat and loses its effect. Instead, the tension spring, the guide block and the guide sleeve ring are used to apply a downward pulling force to the tooling connection seat, so as to perform the downward radial clearance measurement.

[0009] Further, a core shaft suspension seat is coaxially arranged on the fixed base. The core shaft suspension seat is provided with a core shaft adapted to be inserted into the inner ring of the bearing to be measured. The core shaft suspension seat is provided with a core shaft fixing cover corresponding to the core shaft. The core shaft suspension seat and the core shaft fixing cover cooperate to clamp and fix the core shaft, so as to limit the radial movement of the inner ring of the bearing to be measured by fixing the core shaft.

[0010] By adopting the above technical solution, the core shaft is clamped and fixed by the core shaft suspension seat and the core shaft fixing cover to limit the fixing of the inner ring of the bearing to be measured, so as to achieve the relative radial movement of the outer ring and the inner ring under the action of external force and measure it. And it is convenient to disassemble or install the core shaft through the core shaft suspension seat and the core shaft fixing cover to replace different bearings to be measured, thereby improving the applicability and convenience of the measuring device.

[0011] Further, a ball head threaded column is connected between the matching tooling and the tooling connection seat. The matching tooling includes a first fixing ring and a second fixing ring. The first fixing ring and the second fixing ring are used to cooperate to install the outer ring of the bearing to be measured. The ends of the first fixing ring and the second fixing ring close to the tooling connection seat are respectively provided with grooves adapted to the position of the ball head of the ball head threaded column. The two grooves are assembled to fit the ball head threaded column, so that the matching tooling and the tooling connection seat are rigidly connected.

[0012] By adopting the above technical solution, the ball head position of the ball head threaded column is installed through the first fixing ring, the second fixing ring and the corresponding grooves of the ball head threaded column, so as to achieve the rigid connection between the matching tooling and the tooling connection seat, so that there is no radial movement at the connection position between the matching tooling and the tooling connection seat during the measurement of the radial clearance, thus causing an error in the measurement result.

[0013] Further, at least one upper end of the upright post is provided with an upper bracket, and an adjusting threaded rod for adjusting the vertical position of the ascending platform is arranged between the upper bracket and the ascending platform. The adjusting threaded rod is threadedly connected to the ascending platform. One end of the adjusting threaded rod passes through the upper bracket and a boss is arranged at this end. The diameter of the boss is larger than the aperture of the through hole through which the adjusting thread passes through the upper bracket. A thrust bearing is arranged between the boss and the upper end face of the upper bracket.

[0014] By adopting the above technical solution, the vertical position of the ascending platform is adjusted through the upper bracket and the adjusting threaded rod. Rotate the threaded adjusting rod to adjust the height of the ascending platform. When in a suitable position, the relative position between the displacement sensor and the matching tooling is adjusted and the bearing to be measured is measured. The connecting strength of the adjusting threaded rod is high and the adjustment is stable, and it will not slip in the vertical direction during the measurement process. The relative position between the boss and the upper bracket can be maintained through the boss and the thrust bearing, so that only the ascending platform moves up and down during the adjustment process, simplifying the adjustment process and facilitating the adjustment. Moreover, the thrust bearing has a strong bearing capacity, can effectively support the ascending platform through the boss, and the thrust bearing assists its rotation adjustment when the adjusting threaded rod is rotated, reducing the resistance during rotation and facilitating the adjustment.

[0015] Further, fastening bolts are arranged between the first fixing ring and the second fixing ring, fastening bolts are arranged between the fixed base and the core shaft suspension seat, and fastening bolts for locking the position of the core shaft and abutting against the core shaft are arranged through the core shaft fixing cover.

[0016] By adopting the above technical solution, the first fixing ring and the second fixing ring are fixedly connected through the fastening bolts to disassemble and assemble bearings of different specifications for measurement. The fixed base and the core shaft suspension seat are fixedly connected through the fastening bolts, so that the core shaft suspension seat can prevent the core shaft from generating radial movement, and the position of the core shaft is locked through the fastening bolts on the core shaft fixing cover to ensure the fixation of the inner ring.

[0017] Further, a platform corresponding to the detection end of the displacement sensor is arranged on the matching tooling.

[0018] By adopting the above technical solution, the displacement sensor contacts the platform on the upper end face of the matching tooling, preventing the displacement sensor from moving. The displacement sensor will not slip due to the too small contact area between the arc surface of the matching tooling and it, resulting in detection failure.

[0019] Further, the ascending platform is provided with locking threaded posts for locking the positions of the displacement sensor and the upright post corresponding to the displacement sensor and the upright post. The displacement sensor is vertically arranged above the platform.

[0020] By adopting the above technical solution, the locking nuts on the columns on both sides are loosened, and the threaded adjustment rod is rotated to adjust the height of the upper lifting platform. When it is in a suitable position, the height adjustment is stopped, and the locking nut is tightened to fix the lifting platform to prevent it from slipping. The locking nut at the displacement sensor is loosened, and the height of the displacement sensor is adjusted. The locking nut corresponding to the displacement sensor is loosened so that the displacement sensor is vertically against the platform of the matching tooling. After the reading is generated, the locking nut is locked. This can effectively align the displacement sensor with the radial position of the bearing to be measured, and simplifies the alignment steps, achieves a positioning effect, and prevents the displacement sensor from moving.

[0021] Furthermore, the tension spring and the guide block are arranged in pairs and are respectively arranged on the side walls on opposite sides of the connecting rod. The guide block is a spherical protrusion, and the guide ring is arranged between the spherical protrusion and the connecting rod. The spherical protrusion limits the horizontal escape of the guide ring, and one end of the two tension springs is respectively connected to the corresponding guide rings.

[0022] There are at least two spherical bumps which are vertically distributed on the side wall of the connecting rod.

[0023] By adopting the above technical solution, one end of the two tension springs is respectively connected to the corresponding guide rings, and the guide rings are only moved in the vertical direction through the spherical bumps. The spherical bumps clamp the guide rings to prevent the guide rings from detaching from the spherical bumps and the tension springs. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a schematic diagram of the three-dimensional structure of an embodiment of the present invention;

[0025] Figure 2 A schematic diagram showing the structure inside a fixed base according to an embodiment of the present invention;

[0026] Figure 3 It is a schematic diagram of a partial explosion structure of an embodiment of the present invention;

[0027] Figure 4 It is a schematic diagram of a partial cross-sectional structure of an embodiment of the present invention. DETAILED DESCRIPTION

[0028] The embodiments of the present invention are further described below in conjunction with the accompanying drawings: Figures 1-4As shown in the figure, an automatic measuring device for the radial clearance of a rolling bearing includes a test bench 1, two columns 2 provided on the test bench 1. A lifting platform 3 is slidably arranged between the two columns 2, and a displacement sensor 4 for detecting the bearing to be measured is arranged on the lifting platform 3. The test bench 1 is provided with a fixed base 5 and a driving component 6 movably arranged in the fixed base 5. The fixed base 5 is provided with a channel 7 for the vertical movement of the driving component 6. The driving component 6 is connected with a matching tooling 9 for installing the bearing to be measured through a tooling connecting seat 8. The matching tooling 9 installs the bearing to be measured so that its radial direction is located at the detection end below the displacement sensor 4. An electric cylinder 10 for cooperating with the driving component 6 to radially load the bearing to be measured is arranged on the bottom surface of the test bench 1. The driving component 6 includes a force sensor 11 driven by the electric cylinder 10 and located on the same vertical line as the displacement sensor 4. The force sensor 11 cooperates with the displacement sensor 4 to detect the radial clearance of the bearing to be measured. An elastic component 12 is arranged between the force sensor 11 and the tooling connecting seat 8. The elastic component 12 can provide elastic force or tensile force to the bearing to be measured when the electric cylinder 10 drives the force sensor 11 to move.

[0029] The elastic component 12 includes a compression spring 13 arranged in the channel 7 and adapted to the inner wall of the channel 7, and a tension spring 14 arranged in the central hole of the compression spring 13. One end of the tension spring 14 is connected to the tooling connecting seat 8, and the other end is provided with a threaded cap 15. The force sensor 11 is threadedly connected to the threaded cap 15. The compression spring 13 is clamped between the upper end surface of the threaded cap 15 and the lower end surface of the tooling connecting seat 8. The compression spring 13 abuts against the upper end surface of the threaded cap 15 and the lower end surface of the tooling connecting seat 8 under the upward push of the force sensor 11. A connecting rod 16 extends downward from the lower end of the tooling connecting seat 8. A guiding block 17 with a guiding direction along the movement direction of the force sensor 11 is arranged on the side wall of the connecting rod 16. A guiding sleeve 18 with a waist-shaped hole 19 whose length direction is consistent with the guiding direction of the guiding block 17 is arranged between the guiding block 17 and the tension spring 14. The tension spring 14 is slidably arranged on the guiding block 17 through the guiding sleeve 18. The guiding block 17 is located in the waist-shaped hole 19. The tension spring 14 generates tensile force through the up and down sliding limit between the waist-shaped hole 19 and the guiding block 17 under the downward pull of the force sensor 11.

[0030] A core shaft suspension seat 20 is coaxially arranged on the fixed base 5. The core shaft suspension seat 20 is provided with a core shaft 21 adapted to be inserted into the inner ring of the bearing to be measured. The core shaft suspension seat 20 is provided with a core shaft fixing cover 22 corresponding to the core shaft 21. The core shaft suspension seat 20 and the core shaft fixing cover 22 cooperate to clamp and fix the core shaft 21 to limit the radial movement of the inner ring of the bearing to be measured by fixing the core shaft 21.

[0031] A ball head threaded column 23 is connected between the mating tooling 9 and the tooling connection seat 8. The mating tooling 9 includes a first fixing ring 24 and a second fixing ring 25. The first fixing ring 24 and the second fixing ring 25 cooperate to install the outer ring of the bearing to be tested. The first fixing ring 24 and the second fixing ring 25 are respectively provided with grooves 26 adapted to the position of one end of the ball head of the ball head threaded column 23 at one end close to the tooling connection seat 8. The two grooves 26 are spliced ​​and embedded in the ball head threaded column 23 to rigidly connect the mating tooling 9 to the tooling connection seat 8.

[0032] An upper bracket 27 is provided at the upper end of at least one of the columns 2, and an adjusting threaded rod 28 for adjusting the vertical position of the upper lifting platform 3 is provided between the upper bracket 27 and the upper lifting platform 3. The adjusting threaded rod 28 is threadedly connected to the upper lifting platform 3, and one end of the adjusting threaded rod 28 is passed through the upper bracket 27 and a boss 29 is provided at the end. The diameter of the boss 29 is larger than the aperture of the through hole through which the adjusting thread passes through the upper bracket 27, and a thrust bearing 30 is provided between the boss 29 and the upper end surface of the upper bracket 27 to maintain the relative position between the boss 29 and the upper bracket 27.

[0033] A fastening bolt 31 is provided between the first fixing ring 24 and the second fixing ring 25 , a fastening bolt 31 is provided between the fixing base 5 and the spindle suspension seat 20 , and a fastening bolt 31 is passed through the spindle fixing cover 22 and abuts against the spindle 21 for locking the position of the spindle 21 .

[0034] The matching tooling 9 is provided with a platform 32 at the detection end corresponding to the displacement sensor 4 .

[0035] The upper lifting platform 3 is provided with locking threaded columns 33 corresponding to the displacement sensor 4 and the column 2 for locking the position of the displacement sensor 4 and the column 2 . The displacement sensor 4 is vertically arranged above the platform 32 .

[0036] The tension spring 14 and the guide block 17 are arranged in pairs and are respectively arranged on the side walls on the opposite sides of the connecting rod 16. The guide block 17 is a spherical bump. The guide ring 18 is arranged between the spherical bump and the connecting rod 16. The spherical bump limits the horizontal escape of the guide ring 18. One end of the two tension springs 14 is respectively connected to the corresponding guide rings 18.

[0037] Radial clearance measurement steps:

[0038] 1. Select matching tooling according to the bearing model to be tested, such as mandrel, mandrel suspension seat, mandrel fixing cover, and bearing matching tooling;

[0039] 2. Place the bearing to be measured in the space of the mating tooling for placing the bearing to be measured. Place the ball-headed threaded post in the corresponding grooves at the bottoms of the first fixing ring and the second fixing ring, and then fasten and combine the first fixing ring and the second fixing ring through bolts to form the mating tooling, so that the mating components are in a rigid connection state;

[0040] 3. Insert the matching mandrel into the inner ring of the bearing to be measured, and tightly connect the ball-headed threaded post with the tooling connecting seat;

[0041] 4. Install the mandrel suspension seat so that the mandrel suspension seat cooperates to support the end of the mandrel. Install the mandrel fixing cover and lock it through bolts to ensure that the inner ring of the bearing is in a locked state and cannot move radially;

[0042] 5. Loosen the locking nuts on both sides of the column, rotate the threaded adjustment rod to adjust the height of the lifting platform. When in a suitable position, stop the height adjustment and lock the locking nuts to fix the lifting platform to prevent it from slipping;

[0043] 6. Loosen the locking nut at the displacement sensor, adjust the height of the sensor so that it contacts the upper surface platform of the mating tooling, and lock the locking nut after obtaining a reading to prevent the displacement sensor from moving;

[0044] 7. Start the measurement program, give pulses to the electric cylinder to make the lifting rod of the electric cylinder rise evenly;

[0045] 8. The electric cylinder driving force sensor and the threaded nut rise, compress the spring, and push the tooling connecting seat, the ball-headed threaded post, and the mating tooling to rise evenly;

[0046] 9. When the force sensor shows a value (the gravity generated by the upper tooling system has been corrected), it indicates that the electric cylinder contacts the inner ring of the bearing and the measurement system is formed. At this time, the displacement sensor automatically zeros;

[0047] 10. The electric cylinder continues to rise, applying an upward thrust to the outer ring tooling system of the bearing until the value shown by the force sensor reaches the set value of the scheme and then stops moving. At this time, the value shown by the displacement sensor is △X1;

[0048] 11. Lower the lifting rod of the electric cylinder at a uniform speed. After returning to the initial position, the compressed spring loses its effect, and instead, a tension spring and a guide block are replaced to apply a downward pulling force to the tooling connecting seat;

[0049] 12. The electric cylinder continues to lower, applying a downward pulling force to the outer ring tooling system of the bearing until the value shown by the force sensor reaches the set value of the scheme and then stops moving. At this time, the value shown by the displacement sensor is △X2;

[0050] 13. Lift the push rod of the electric cylinder at a uniform speed. After returning to the initial position, both the compressed spring and the tension spring are in a free state and lose their effects;

[0051] 14. At this time, the radial clearance of the bearing is the change in the sensor indication value △X=丨△X1-△X2丨;

[0052] 15. Repeat steps 2 to 14 to complete the measurement of other bearings of the same model;

[0053] 16. To measure other models, start from step 1.

[0054] Radial stiffness measurement steps:

[0055] The measurement steps are the same as those for radial clearance, but the load-displacement relationship needs to be recorded in real time, and the software needs to be used for graphical drawing and data storage. Generally, the test starts after a certain preload is applied to the bearing, and the measurement can be performed in both positive and negative directions. For different types of bearings, it is necessary to pay attention to whether the force direction is reasonable to avoid damage to the bearing.

[0056] The above embodiment is only one of the preferred specific embodiments of the present invention. Common changes and substitutions made by those skilled in the art within the scope of the technical solution of the present invention are all included in the protection scope of the present invention.

Claims

1. An automatic measuring device for the radial clearance of a rolling bearing, characterized in that: It includes a test bench, two columns arranged on the test bench. A lifting platform is slidably arranged between the two columns, and a displacement sensor for detecting the bearing to be tested is arranged on the lifting platform. The test bench is provided with a fixed base and a driving component movably arranged in the fixed base. The fixed base is provided with a channel for the vertical movement of the driving component. The driving component is connected with a matching tooling for installing the bearing to be tested through a tooling connecting seat. The matching tooling installs the bearing to be tested so that its radial direction is located at the detection end of the lower end of the displacement sensor. An electric cylinder for radially loading the bearing to be tested in cooperation with the driving component is arranged on the bottom surface of the test bench. The driving component includes a force sensor driven by the electric cylinder and located on the same vertical line as the displacement sensor. The force sensor and the displacement sensor cooperate to detect the radial clearance of the bearing to be tested. An elastic component is arranged between the force sensor and the tooling connecting seat. The elastic component can provide elastic force or tensile force to the bearing to be tested when the electric cylinder drives the force sensor to move. The elastic component includes a compression spring arranged in the channel and adapted to the inner wall of the channel, and a tension spring arranged in the central hole of the compression spring. One end of the tension spring is connected to the tooling connecting seat, and the other end is provided with a threaded cap. The force sensor is threadedly connected to the threaded cap. The compression spring is clamped between the threaded cap and the tooling connecting seat. The compression spring abuts against the upper end surface of the threaded cap and the lower end surface of the tooling connecting seat under the upward push of the force sensor. A connecting rod extends downward from the lower end of the tooling connecting seat. A guiding block with a guiding direction along the movement direction of the force sensor is arranged on the side wall of the connecting rod. A guiding sleeve with a waist-shaped hole having a length direction consistent with the guiding direction of the guiding block is arranged between the guiding block and the tension spring. The tension spring is slidably arranged on the guiding block through the guiding sleeve. The guiding block is located in the waist-shaped hole. The tension spring generates tensile force through the up-and-down sliding limit between the waist-shaped hole and the guiding block under the downward pull of the force sensor.

2. The automatic measuring device for the radial clearance of a rolling bearing according to claim 1, characterized in that: A core shaft suspension seat is coaxially arranged on the fixed base. The core shaft suspension seat is provided with a core shaft adapted to be inserted into the inner ring of the bearing to be tested. The core shaft suspension seat is provided with a core shaft fixing cover corresponding to the core shaft. The core shaft suspension seat and the core shaft fixing cover cooperate to clamp and fix the core shaft to limit the radial movement of the inner ring of the bearing to be tested by fixing the core shaft.

3. The automatic measuring device for the radial clearance of a rolling bearing according to claim 2, wherein: A ball head threaded column is connected between the matching tooling and the tooling connecting seat. The matching tooling includes a first fixing ring and a second fixing ring. The first fixing ring and the second fixing ring cooperate to install the outer ring of the bearing to be tested. Grooves adapted to the position of the ball head end of the ball head threaded column are respectively arranged at one ends of the first fixing ring and the second fixing ring close to the tooling connecting seat. The two grooves are assembled and embedded with the ball head threaded column to rigidly connect the matching tooling and the tooling connecting seat.

4. The automatic measuring device for the radial clearance of a rolling bearing according to claim 1, wherein: An upper bracket is provided at the upper end of at least one of the columns, and an adjusting threaded rod for adjusting the vertical position of the upper lifting platform is provided between the upper bracket and the upper lifting platform. The adjusting threaded rod is threadedly connected to the upper lifting platform, and one end of the adjusting threaded rod is passed through the upper bracket and a boss is provided at the end. The diameter of the boss is larger than the diameter of the through hole through which the adjusting thread passes through the upper bracket, and a thrust bearing is provided between the boss and the upper end surface of the upper bracket.

5. The automatic measuring device for the radial clearance of a rolling bearing according to claim 3, characterized in that: A fastening bolt is arranged between the first fixing ring and the second fixing ring, a fastening bolt is arranged between the fixing base and the spindle suspension seat, and a fastening bolt is passed through the spindle fixing cover and abuts against the spindle for locking the spindle position.

6. The automatic measuring device for the radial clearance of a rolling bearing according to claim 1, characterized in that: The matching tooling is provided with a platform at the detection end of the displacement sensor.

7. The automatic measuring device for the radial clearance of a rolling bearing according to claim 6, characterized in that: The upper lifting platform is provided with locking threaded columns for locking the positions of the displacement sensors and the columns corresponding to the displacement sensors and the columns, and the displacement sensors are vertically arranged above the platform.

8. The automatic measuring device for the radial clearance of a rolling bearing according to claim 1, characterized in that: The tension spring and the guide block are arranged in pairs and are respectively arranged on the side walls on the opposite sides of the connecting rod. The guide block is a spherical protrusion. The guide ring is arranged between the spherical protrusion and the connecting rod. The spherical protrusion limits the horizontal escape of the guide ring. One end of the two tension springs is respectively connected to the corresponding guide ring.

Images