CN204514302U - The measurement mechanism of oscillating bearing end-play - Google Patents

Abstract

The utility model relates to a measuring device for the radial clearance of a joint bearing. The device is composed of a feeding system, a measuring system, a fixture system and a frame; wherein, the feeding system is controlled by a control system; The feed system and the right feed system are composed of the left feed system and the right feed system, which are symmetrically arranged on both sides of the fixture system; the measurement system includes a displacement sensor and a dovetail slide table. In addition, the left and right feeding system is driven by a servo motor. After adopting the structure, the device not only has high detection precision but also has high automation degree in the detection process during the process of measuring the radial clearance.

Description

Measuring device for radial clearance of joint bearing

technical field

The utility model relates to a measuring device for the radial play of a joint bearing.

Background technique

Joint bearings, also known as spherical plain bearings, are widely used in aerospace, engineering machinery, water conservancy and hydropower and other fields. Clearance is the judgment standard and main basis for many industrial applications and experimental researches such as the inspection and selection of finished products of spherical plain bearings, fixed installation, life test, friction and wear mechanism, etc., which directly affects the service life of spherical plain bearings. Therefore, the clearance measurement of spherical plain bearings Equipment research and development is of great significance.

"A detection device for axial clearance and radial clearance of a spherical plain bearing" (patent application number: CN201010616836.6) discloses a detection device for measuring the axial clearance and radial clearance of a spherical plain bearing. The device can realize the detection of the radial clearance of the joint bearing, but in the process of measuring the radial clearance of the device, the measurement of the radial clearance must be completed by manually operating the measuring device, which causes inconvenience in operation and automation. low-level problem. At the same time, in the process of measuring the clearance, the measurement error is relatively large, and the accuracy of clearance detection is not high.

Utility model content

In order to overcome the above-mentioned problems in the prior art, the utility model provides a measuring device for the radial clearance of a joint bearing. In the process of measuring the radial clearance, the utility model not only has high detection precision, but also has a high degree of automation in the detection process.

In order to solve the above technical problems, the utility model provides a measuring device for radial clearance of joint bearings. The device is composed of a feed system, a measuring system, a fixture system and a frame; wherein, the feed system is controlled by a control system; the feed system is composed of a left feed system and a right feed system, and the left feed system and the right feed system are The feeding system is symmetrically arranged on both sides of the fixture system.

The fixture seat of the fixture system is provided with a through hole Ⅰ, the pressing piece is provided with a through hole Ⅱ, and the sleeve cup is provided with a boss, the outer diameter of the boss is equal to the diameter of the inner hole of the joint bearing to be tested, and the boss, the through hole Ⅰ is coaxial with through hole Ⅱ; the sleeve cup is fixedly installed on the top of the fixture seat, the boss of the sleeve cup goes deep into the inner hole of the joint bearing, the pressing piece is fixedly installed on the top of the joint bearing, and the joint bearing is pressed by screws. on the boss of the cup.

The servo motor Ⅰ of the left feed system is fixedly installed on the left end of the guide rail Ⅰ, the guide rail Ⅰ is a hollow structure, the bottom of the guide rail Ⅰ is fixedly installed on the frame, the output shaft of the servo motor Ⅰ is fixedly connected with the ball screw Ⅰ, and the ball screw Ⅰ is located in the middle of the guide rail Ⅰ; the slider Ⅰ is movably installed on the guide rail Ⅰ, the bottom of the slider Ⅰ is connected with the ball screw Ⅰ through threads, and the rotation of the ball screw Ⅰ can drive the slider Ⅰ to make a linear motion along the guide rail Ⅰ; The load cell Ⅰ is fixedly installed on the radial load cell bracket Ⅰ, and the radial load cell bracket Ⅰ is fixedly installed on the slider Ⅰ; the middle of the two ejector rods Ⅰ is movably supported on the radial linear bearing seat through the linear bearing Ⅰ. On Ⅰ, the left end of each ejector rod Ⅰ is fixedly connected with the load cell Ⅰ through the connecting piece Ⅰ, and the right end of each ejector rod Ⅰ is fixedly connected with the measuring head Ⅰ through the measuring head bracket Ⅰ, and the measuring head Ⅰ is located in the measuring head bracket. I central part.

The displacement sensor of the measurement system is fixedly installed on the dovetail groove slide table through the displacement sensor bracket, the dovetail groove slide table is installed on the slide table base, and the slide table base is fixedly installed on the frame.

The servo motor II of the right feed system is fixedly installed on the left end of the guide rail II, the guide rail II is a hollow structure, the bottom of the guide rail II is fixedly installed on the frame, the output shaft of the servo motor II is fixedly connected with the ball screw II, and the ball screw Ⅱ is located in the middle of the guide rail Ⅱ; the slider Ⅱ is movably installed on the guide rail Ⅱ, and the bottom of the slider Ⅱ is connected with the ball screw Ⅱ through threads, and the rotation of the ball screw Ⅱ can drive the slider Ⅱ to move linearly along the guide rail Ⅱ The load cell II is fixedly installed on the radial load cell bracket II, and the radial load cell bracket II is fixedly installed on the slider II; the middle of the two ejector rods II is supported on the radial linear bearing through the linear bearing II. On the seat II, the left end of each ejector rod II is fixedly connected to the load cell II through the connecting piece II, and the right end of each ejector rod II is fixedly connected to the measuring head II through the measuring head bracket II, and the measuring head II is located at the measuring head The central part of the stent II.

The control system is a PLC intelligent control system.

The measuring head I is composed of a fixed block I, a rotary block I, and a pin shaft I. The rotary block I has a V-shaped groove on one side, and the other side is hinged with the fixed block I through the pin shaft I. Measuring head II is composed of fixed block II, rotary block II, and pin shaft II. One side of rotary block II has a V-shaped groove, and the other side is hinged with fixed block II through pin shaft II. During the measurement, the rotary block I of the measuring head I and the rotary block II of the measuring head II jointly clamp the outer ring of the joint bearing.

The beneficial effects of the utility model are (for the sake of brevity, this paragraph does not distinguish the components of the left and right feed systems, such as servo motor I and servo motor II, which are collectively referred to as servo motors): the feed system of the utility model adopts Servo motor drive, and the feed system is controlled by the control system, which adopts PLC intelligent control system. During the measurement process, the servo motor is controlled by the PLC intelligent control system, and then the movement of the measuring head is controlled by the ball screw, slider, ejector rod, etc. At the same time, the stop of the measuring head is judged according to the magnitude of the load displayed by the load cell and movement, so that the device can accurately detect and control the displacement and force of the measuring head, and then can accurately load and unload, which improves the automation of the whole device. In addition, the combination of using the displacement sensor to detect the radial clearance of the joint bearing greatly improves the accuracy of the device for measuring the radial clearance of the joint bearing.

Description of drawings

Figure 1 is a schematic structural diagram of a measuring device for the radial clearance of a spherical plain bearing;

Fig. 2 is a partial enlarged view of H in Fig. 1;

Figure 3 shows the connection relationship between servo motor I, ball screw I and slider I in the left feed system;

Figure 4 shows the connection relationship between servo motor II, ball screw II and slider II in the right feed system;

Figure 5 is a cross-sectional view of the fixture system (including joint bearings and racks);

Figure 6 is a top view of the fixture system (including joint bearings, ejector rods Ⅰ and Ⅱ, measuring head brackets Ⅰ and Ⅱ, and measuring heads Ⅰ and Ⅱ);

Fig. 7 is the structural representation of cover cup;

Fig. 8 is a schematic structural view of the pressing sheet;

Fig. 9 is the structural representation of measuring head 1;

Fig. 10 is a structural schematic diagram of the measuring head II;

Fig. 11 is a schematic structural diagram of the measurement system.

In the above drawings, 1. Rack, 2. Servo motor Ⅰ, 3. Guide rail Ⅰ, 4. Load cell Ⅰ, 5. Radial load cell bracket Ⅰ, 6. Slider Ⅰ, 7. Push rod Ⅰ , 8. Displacement sensor, 9. Dovetail slide table, 10. Measuring head bracket Ⅰ, 11. Fixture system, 11.1. Cup set, 11.2. Compression piece, 11.3. Fixture seat, 11.4. Screw, 12. Joint bearing, 13. Measuring head bracket Ⅱ, 14. Displacement sensor bracket, 15. Slide table base, 16. Upper ejector rod Ⅱ, 17. Slider Ⅱ, 18. Radial load cell bracket Ⅱ, 19. Load cell Ⅱ, 20 .Guide rail II, 21. Servo motor II, 22. Connector II, 23. Linear bearing II, 24. Radial linear bearing seat II, 25. Measuring head II, 25.1. Fixed block II, 25.2. Pin shaft II, 25.3 .Rotary block Ⅱ, 26. Measuring head Ⅰ, 26.1. Fixed block Ⅰ, 26.2. Pin shaft Ⅰ, 26.3. Rotary block Ⅰ, 27. Radial linear bearing seat Ⅰ, 28. Linear bearing Ⅰ, 29. Connecting piece Ⅰ, 30. Through hole I, 31. Through hole II, 32. Boss, 33. Ball screw I, 34 Ball screw II.

Detailed ways

Below in conjunction with accompanying drawing and embodiment the utility model is further described.

Fig. 1 is a measuring device for the radial clearance of a joint bearing disclosed in the utility model. For the convenience of description, the "left" and "right" referred to below are consistent with the left and right directions of the drawings themselves, but they do not limit the structure of the utility model. 2 to 11, it can be seen that the device is composed of a feed system, a measuring system, a fixture system 11 and a frame 1; wherein, the feed system is composed of a left feed system and a right feed system, and the left feed system and the right feed system The feed systems are respectively symmetrically arranged on both sides of the clamp system 11 .

The fixture system 11 is composed of a screw 11.4, a fixture seat 11.3, a pressing piece 11.2, and a sleeve cup 11.1; wherein, the fixture base 11.3 is provided with a through hole I30, the pressing piece 11.2 is provided with a through hole II31, and the sleeve cup 11.1 is provided with a boss 32 , the outer diameter of the boss 32 is equal to the diameter of the inner hole of the tested joint bearing 12, and the boss 32, the through hole I30 and the through hole II31 are coaxial; the sleeve cup 11.1 is fixed on the top of the fixture seat 11.3 by screws, The boss 32 of the sleeve cup 11.1 goes deep into the inner hole of the joint bearing 12, and the pressing piece 11.2 is fixedly installed on the joint bearing 12, and the joint bearing 12 is pressed on the boss 32 of the sleeve cup 11.1 by the screw 11.4.

The left feed system includes servo motor Ⅰ2, ball screw Ⅰ33, guide rail Ⅰ3, slider Ⅰ6, radial load cell support Ⅰ5, load cell Ⅰ4, ejector rod Ⅰ7, connecting piece Ⅰ29, measuring head bracket Ⅰ10, measuring head Ⅰ26 , Linear bearing Ⅰ28, radial linear bearing seat Ⅰ27.

The servo motor I2 is fixedly installed on the left end of the guide rail I3, the guide rail I3 is a hollow structure, the bottom of the guide rail I3 is fixedly installed on the frame 1, the output shaft of the servo motor I2 is fixedly connected with the ball screw I33, and the ball screw I33 is located on the guide rail I3 The slide block I6 is movably installed on the guide rail I3, and the slide block I6 can move linearly along the guide rail I3, the bottom of the slide block I6 and the ball screw I33 are screwed together, and the rotation of the ball screw I33 can drive the slide The block I6 moves linearly along the guide rail I3; the load cell I4 is fixedly installed on the radial load cell bracket I5, and the radial load cell bracket I5 is fixedly installed on the slider I6; the number of ejector rods I7 is two, In addition, the middle of the two ejector rods I7 is movably supported on the radial linear bearing seat I27 through the linear bearing I28, and the left end of each ejector rod I7 is fixedly connected with the load cell I4 through the connecting piece I29. The right end is fixedly connected with the measuring head I26 through the measuring head bracket I10, and the measuring head I26 is located in the center of the measuring head bracket I10.

The measurement system includes a displacement sensor 8 and a dovetail slide table 9; the displacement sensor 8 is fixedly installed on the dovetail slide table 9 through a displacement sensor bracket 14, and the dovetail slide table 9 is installed on the slide table base 15. At the same time, the slide table base 15 Fixed installation on rack 1.

The right feed system includes servo motor Ⅱ21, ball screw Ⅱ34, guide rail Ⅱ20 and slider Ⅱ17, radial load cell support Ⅱ18, load cell Ⅱ19, ejector rod Ⅱ16, connecting piece Ⅱ22, measuring head bracket Ⅱ13, measuring head Ⅱ25 , linear bearing Ⅱ23, radial linear bearing seat Ⅱ24; servo motor Ⅱ21 is fixedly installed on the left end of the guide rail Ⅱ20, the guide rail Ⅱ20 is a hollow structure, the bottom of the guide rail Ⅱ20 is fixedly installed on the frame 1, the output shaft of the servo motor Ⅱ21 and the ball screw Ⅱ34 is fixedly connected, and the ball screw Ⅱ34 is located in the middle of the guide rail Ⅱ20; the slider Ⅱ17 is movably installed on the guide rail Ⅱ20, and the slider Ⅱ17 can move linearly along the guide rail Ⅱ20, and the bottom of the slider Ⅱ17 and the ball screw Ⅱ34 pass through the thread Connected together, and the rotation of the ball screw Ⅱ34 can drive the slider Ⅱ17 to move linearly along the guide rail Ⅱ20; the load cell Ⅱ19 is fixedly installed on the radial load cell bracket Ⅱ18, and the radial load cell bracket Ⅱ18 is fixedly installed on the slider Ⅱ17; the number of ejector rods Ⅱ16 is two, and the middle of the two ejector rods Ⅱ16 is supported on the radial linear bearing seat Ⅱ24 through the linear bearing Ⅱ23, and the left end of each ejector rod Ⅱ16 is connected with the connecting piece Ⅱ22 The load cell II19 is fixedly connected, and the right end of each ejector rod II16 is fixedly connected to the measuring head II25 through the measuring head bracket II18, and the measuring head II25 is located at the center of the measuring head bracket II18.

The measuring head I26 is composed of a fixed block I26.1, a rotary block I26.3, and a pin shaft I26.2. There is a V-shaped groove on one side of the rotary block I26.3, and the other side is connected to the fixed block through the pin shaft I26.2. Ⅰ 26.1 Hinged together. Measuring head Ⅱ25 is composed of fixed block Ⅱ25.1, rotary block Ⅱ25.3 and pin shaft Ⅱ25.2. One side of rotary block Ⅱ25.3 has a V-shaped groove, and the other side passes through pin shaft Ⅱ25.2 and fixed block Ⅱ25. 1 are hinged together and can rotate around pin shaft II 25.2. During the measurement, the rotary block I 26.3 and the rotary block II 25.3 clamp the outer ring of the joint bearing 12 together.

Both the servo motor I2 and the servo motor II21 are controlled by a PLC intelligent control system.

The left feed system and the right feed system are symmetrical about the position of the clamp seat 11.3. In addition, the components of the left and right feed systems are the same (for example: the model parameters of the servo motor I2 and the servo motor II21 are the same, the shape, structure and size of the radial load cell bracket II18 and the radial load cell bracket I5 are the same) , which facilitates the purchase and installation of various parts.

The working process of the present utility model is roughly as follows:

a. The system is powered, the PLC intelligent control system is turned on, and the rotation of the output shaft of the servo motor I2 is controlled, and then the measuring head I26 is controlled to retreat (that is, away from the fixture system 11) through the ball screw I33, slider I6, ejector rod I7, etc.; Control the rotation of the output shaft of the servo motor Ⅱ21, and then control the retreat of the measuring head Ⅱ25 (that is, away from the fixture system 11) through the ball screw Ⅱ34, slider Ⅱ17, ejector rod Ⅱ16, etc.; provide space for installing the joint bearing 12 under test.

b. According to the above, install the tested spherical plain bearing 12 on the fixture system 11 (that is, the inner ring of the spherical plain bearing 12 is fixed outside the boss 32 of the sleeve cup 11.1, and the pressing piece 11.2 presses the spherical plain bearing 12 through the screw 11.4. On the boss 32 of the sleeve cup 11.1, while the inner ring of the joint bearing 12 can still rotate relative to the outer ring), at the same time adjust the rotating block I26.3 of the measuring head I26 and the rotating block II25.3 of the measuring head II25, so that It is automatically positioned with the outer ring of the spherical plain bearing 12 .

c. Control the movement of the measuring head II25 and the measuring head I26 through the PLC intelligent control system, so that the measuring head II25 and the measuring head I26 are close to the joint bearing 12 .

d. Set the test force according to the test requirements (for example, set the test force to 50N), control the servo motor I2 through the PLC intelligent control system, and then control the advance of the measuring head I26 (that is, move to the fixture system 11), when the measuring head I26 rotates When the block I26.3 is in contact with the joint bearing 12 and the load cell I4 shows a pressure value of 50N, stop advancing.

e. The servo motor II 21 is controlled by the PLC intelligent control system, and then the measuring head II 25 is controlled to move forward (that is, to move toward the fixture system 11 ). When the rotating block II 25.3 of the measuring head II 25 and the inner ring of the joint bearing 12 just start to contact (generally, when the load cell II 19 shows a pressure value of 2N, it is considered that the rotating block II 25.3 of the measuring head II 25 is in contact with the joint bearing 12 The inner rings of the At this time, fine-tune the dovetail slide table 9 to make it slide slowly, adjust the contact position between the contact of the displacement sensor 8 and the end of the measuring head bracket I10, and make the contact of the displacement sensor 8 press against the end of the measuring head bracket I10 ( Under normal circumstances, when the displacement sensor 8 has a small amount of compression displacement, such as 0.01mm, it can be considered that the contact of the displacement sensor 8 has been pressed against the end of the measuring head bracket I10), and the displacement sensor 8 is fixed in the dovetail groove by screw connection on the slide table 9, and lock the dovetail slide table 9 (that is: the dovetail slide table 9 is in a non-slidable state), and write down the indication of the displacement sensor 8 as the indication I.

f. Set the same test force (for example, if the test force is set to 50N above, then this time also set the test force to 50N). The PLC intelligent control system continues to control the advance of the measuring head II 25, so that the rotating block II 25.3 of the measuring head II 25 is in contact with the inner ring of the joint bearing 12. When the load cell II19 shows a pressure value of 50N, the movement of the measuring head II25 is stopped. In the process of the pressure indication value of the load cell II19 gradually increasing from 2N to 50N, the PLC intelligent control system simultaneously controls the servo motor I2, and then controls the measuring head I26 to retreat, and the retreating speed of the measuring head I26 is slightly higher than that of the measuring head II25 When the load cell I4 shows a pressure value of 2N or less than 2N, stop the movement of the measuring head I26. After measuring head II 25 and measuring head I 26 stop moving, wait for 5 minutes, read the indication of the displacement sensor 8, and write down the data as the indication II, then the difference between the indication II and the indication I is It is the radial clearance value of the joint bearing obtained in this test.

g. Unlock the dovetail slide table 9 (that is, put the dovetail slide table 9 in a slidable state), slide the dovetail slide table 9 backward, and then drive the displacement sensor 8 back. At the same time, the measuring head support II13, the measuring head support I10, the measuring head II25 and the measuring head I26 are controlled to retreat through the PLC intelligent control system. Remove the spherical plain bearing I2 from the clamping system 11.

h. When the system is powered off, a measurement process is completed. Appropriately rotate the inner ring of the joint bearing 12 to a certain angle (such as 5︒) relative to the outer ring, repeat the above steps three to five times and take the average value as the radial clearance value of the joint bearing.

During the measurement process, since the servo motor is controlled by the PLC intelligent control system (for the sake of brevity, this paragraph does not distinguish between the components of the left and right feed systems, such as the servo motor Ⅰ2 and the servo motor Ⅱ21, which are collectively referred to as the servo motor), and then through The ball screw, slider, ejector rod, etc. control the movement of the measuring head. At the same time, the stop and movement of the measuring head are judged according to the magnitude of the load displayed by the load cell, so that the device can accurately measure the displacement and force of the measuring head. Detection and control are carried out, and then the loading and unloading can be carried out accurately, which improves the degree of automation of the whole device. In addition, the combination of using the displacement sensor to detect the radial clearance of the joint bearing greatly improves the accuracy of the device for measuring the radial clearance of the joint bearing.

The embodiments of the present utility model have been described in detail above in conjunction with the accompanying drawings, but the present utility model is not limited to the above embodiments. Various changes are made.

Claims (3)

1. A measuring device for the radial clearance of a joint bearing, characterized in that: the device is composed of a feed system, a measurement system, a fixture system, a control system and a frame; wherein: the feed system is controlled by the control system; The feed system consists of a left feed system and a right feed system, which are symmetrically arranged on both sides of the fixture system; The fixture seat of the fixture system is provided with a through hole I, the pressing piece is provided with a through hole II, and the sleeve cup is provided with a boss whose outer diameter is equal to the diameter of the inner hole of the joint bearing to be tested, and the boss, The through hole I and the through hole II are coaxial; the sleeve cup is fixed and installed on the fixture seat by screws, the boss of the sleeve cup goes deep into the inner hole of the joint bearing, and the pressing piece is fixedly installed on the joint bearing, and Press the joint bearing on the boss of the sleeve cup with screws; The servo motor I of the left feed system is fixedly installed on the left end of the guide rail I, the guide rail I is a hollow structure, the bottom of the guide rail I is fixedly installed on the frame, the output shaft of the servo motor I is fixedly connected with the ball screw I, and the ball screw The screw Ⅰ is located in the middle of the guide rail Ⅰ; the slider Ⅰ is movably installed above the guide rail Ⅰ, the bottom of the slider Ⅰ is connected with the ball screw Ⅰ through threads, and the rotation of the ball screw Ⅰ can drive the slider Ⅰ to make a straight line along the guide rail Ⅰ Movement; the load cell Ⅰ is fixedly installed on the radial load cell bracket Ⅰ, and the radial load cell bracket Ⅰ is fixedly installed on the slider Ⅰ; the middle of the two ejector rods Ⅰ is movably supported on a radial line by a linear bearing Ⅰ. On the bearing seat Ⅰ, the left end of each ejector rod Ⅰ is fixedly connected with the load cell Ⅰ through the connecting piece Ⅰ, and the right end of each ejector rod Ⅰ is fixedly connected with the measuring head Ⅰ through the measuring head bracket Ⅰ. The center of the head support Ⅰ; The displacement sensor I of the measuring system is fixedly installed on the dovetail groove sliding table I through the displacement sensor bracket, and the dovetail groove sliding table I is installed on the sliding table base, and at the same time, the sliding table base is fixedly installed on the frame; The servo motor II of the right feed system is fixedly installed on the left end of the guide rail II, the guide rail II is a hollow structure, the bottom of the guide rail II is fixedly installed on the frame, the output shaft of the servo motor II is fixedly connected with the ball screw II, and the ball screw The screw Ⅱ is located in the middle of the guide rail Ⅱ; the slider Ⅱ is movably installed above the guide rail Ⅱ, the bottom of the slider Ⅱ is connected with the ball screw Ⅱ through threads, and the rotation of the ball screw Ⅱ can drive the slider Ⅱ to move along the guide rail Ⅱ. Linear motion; the load cell II is fixedly installed on the radial load cell bracket II, and the radial load cell bracket II is fixedly installed on the slider II; the middle of the two ejector rods II is supported in the radial direction by the linear bearing II. On the linear bearing seat II, the left end of each ejector rod II is fixedly connected with the load cell II through the connecting piece II, and the right end of each ejector rod II is fixedly connected with the measuring head II through the measuring head bracket II, and the measuring head II is located at The center part of the measuring head holder II. 2. The measuring device for the radial clearance of spherical plain bearings according to claim 1, characterized in that: the measuring head I is composed of a fixed block I, a rotary block I, and a pin shaft I, and there is a V on one side of the rotary block I. The other side is hinged with the fixed block I through the pin shaft I; the measuring head II is composed of the fixed block II, the rotary block II, and the pin shaft II. There is a V-shaped groove on one side of the rotary block II, and the other side passes Pin shaft II is hinged with fixed block II. 3. The device for measuring the radial clearance of spherical plain bearings according to claim 1 or 2, characterized in that: the control system is a PLC intelligent control system.