Bearing clearance detection device and detection method

Abstract

The invention discloses a bearing clearance detection device and a detection method, which belong to the field of bearing detection, and comprises a box body; a guide plate is obliquely installed on the side wall of the box body, a guide groove is provided on the guide plate, a bayonet is provided on the bottom wall of the guide groove, and the cross-sectional area of ​​the bayonet gradually increases from top to bottom; a telescopic rod is fixedly installed on the side wall of the box body, and a pressure plate is detachably installed on the output end of the telescopic rod, and the pressure plate is used to squeeze the bearing and fix the bearing in the bayonet; and a detection mechanism and a transfer mechanism matched with the bearing are provided on the box body; sliding grooves are symmetrically provided on the side wall of the guide groove, and a clamping plate is slidably installed in the sliding groove; in this scheme, a driving mechanism and a clamping plate are set; when the bearing rolls along the guide groove, the driving mechanism drives the two clamping plates to approach each other, and the clamping plates push the bearing, so that the bearing can be straightened, and the clamping plate has a deceleration effect when clamping the bearing, which plays a role in ensuring that the bearing can stably enter the bayonet.

Description

Technical Field

[0001] The present invention relates to the field of bearing detection, and more specifically, to a bearing clearance detection device and a detection method. Background Art

[0002] Bearing clearance, also known as bearing clearance, refers to the amount of movement when the inner ring or outer ring of the bearing is fixed when it is not installed on the shaft or bearing box, and the unfixed side moves radially or axially. Depending on the direction of movement, bearing clearance can be divided into radial clearance and axial clearance.

[0003] The Chinese patent with authorization announcement number: CN108759758B discloses an engine bearing clearance detection device and measurement method, which can quickly clamp and position the bearing to be tested and measure the axial clearance of the bearing in a rotating state; the bearing to be tested is clamped by a pneumatic clamp, which is convenient for clamping. After clamping, a tension rod is used to connect the bearing to a power source. The inner ring of the bearing can rotate under the drive of the motor, and the outer ring of the bearing is fixed, which completely simulates the working conditions of the bearing when it is actually working.

[0004] The above patent still has the following shortcomings: during testing, the staff is required to place the bearing in the specified position before starting the test; this process requires the operator to accurately position the bearing at a specific test point to ensure the accuracy and reliability of the test results. However, this manual placement method often leads to low work efficiency because additional time and labor are required to adjust the position of the bearing before each test; in addition, human factors may also introduce errors, further affecting the accuracy and efficiency of the test.

[0005] Therefore, a bearing clearance detection device and a bearing clearance detection method are proposed. Summary of the invention

[0006] In view of the problems existing in the prior art, the purpose of the present invention is to provide a bearing clearance detection device and a detection method, which can reduce the errors generated during human operation and improve the detection accuracy.

[0007] To solve the above problems, the present invention adopts the following technical solutions.

[0008] A bearing clearance detection device comprises a housing;

[0009] A guide plate is obliquely installed on the side wall of the box body, a guide groove is provided on the guide plate, a bayonet is provided on the bottom wall of the guide groove, and the cross-sectional area of ​​the bayonet gradually increases from top to bottom;

[0010] A telescopic rod is fixedly installed on the side wall of the box body, and a pressure plate is detachably installed on the output end of the telescopic rod, and the pressure plate is used to squeeze the bearing and fix the bearing in the bayonet; and a detection mechanism and a transfer mechanism that cooperate with the bearing are provided on the box body;

[0011] The side walls of the guide groove are symmetrically provided with slide grooves, in which clamping plates are slidably installed, and the box body is provided with a driving mechanism for driving the two clamping plates to synchronously approach each other or synchronously move away from each other;

[0012] A cavity is formed on the guide plate, air holes are evenly formed on the top wall of the cavity, and an air supply mechanism for supplying air to the cavity and a pressurizing mechanism for increasing the impact force of airflow discharged from the air holes are provided on the box body.

[0013] The staff makes the side wall of the flat side of the bearing perpendicular to the bottom wall of the guide groove, and then places the bearing to be tested in the guide groove. At this time, the bearing rolls along the inclined guide groove. In the process of the bearing rolling along the guide groove, the driving mechanism drives the two clamps to approach each other. In the process of the two clamps approaching each other, the clamps push the bearing, so that the bearing can be straightened; and the clamps have a deceleration effect when clamping the bearing, which ensures that the bearing can stably enter the bayonet. At the same time, the air supply mechanism provides gas to the cavity and pressurizes the gas discharged from the air hole through the pressurizing mechanism, so that the friction between the bearing and the bottom wall of the guide groove can be reduced in the process of the clamp forcibly pushing the bearing to straighten the bearing, thereby protecting the integrity of the outer wall of the bearing and the flatness of the guide groove, ensuring that the bearing can roll normally into the bayonet.

[0014] When the bearing rolls into the bayonet, the telescopic rod is started, and the pressure plate is driven by the output end of the telescopic rod to squeeze the bearing. At this time, the outer ring of the bearing can be tightly fixed by the bayonet on the pressure plate and the guide plate; then the detection mechanism starts to work and detects the radial clearance. After the detection is completed, the transfer mechanism can automatically transfer the detected bearing to prepare for work again.

[0015] During the entire process, it is only necessary to place the bearing in the guide groove. There is no need for the staff to accurately place the bearing in the bayonet, which improves work efficiency and detection accuracy.

[0016] Furthermore, the detection mechanism includes a through hole opened on the side wall of the box, a hydraulic rod is fixedly installed in the box, an electric guide rail is installed on the output end of the hydraulic rod, and a push rod is horizontally fixedly installed on the output end of the electric guide rail, and the push rod is used to push the inner ring of the bearing.

[0017] After the bearing to be tested falls into the bayonet, the hydraulic rod is started, and the output end of the hydraulic rod is extended to drive the electric guide rail to move toward the through hole, and the push rod passes through the through hole and the inner ring of the bearing. The telescopic rod then drives the pressure plate to fix the bearing in the bayonet. The electric guide rail is then started, and the push rod is driven up and down by the output end of the electric guide rail. The radial clearance of the bearing can be determined by the moving distance of the output end of the electric guide rail. Among them, applying pressure to the inner ring of the bearing to make the inner ring of the bearing move radially to measure the radial clearance is a prior art and will not be described in detail.

[0018] Furthermore, the transfer mechanism includes a sleeve fixedly mounted on the side wall of the box body, the sleeve is located directly below the bayonet, a push rod is vertically slidably inserted on the top wall of the sleeve, a card plate cooperating with the bayonet is installed on the top of the push rod, that is, the cross-sectional area of ​​the card plate gradually increases from top to bottom, a piston made of magnetic material is slidably mounted in the sleeve, and the ratio of the piston diameter to the push rod diameter is 2-3; the pressure plate is made of magnetic material, the pressure plate and the piston attract each other, and the attraction between the pressure plate and the piston is greater than the sum of the weight of the piston, the push rod, the card plate and the bearing.

[0019] When the telescopic rod is in the maximum contraction state, the pressure plate is away from the sleeve. At this time, the sum of the gravity of the push rod, the card plate and the piston is greater than the attraction between the piston and the pressure plate. Therefore, under the joint action of the push rod, the piston and the card plate, the piston is at the lowest point;

[0020] As the pressure plate gradually moves downward, it gradually approaches the sleeve. When the distance between the bottom wall of the pressure plate and the top wall of the bearing is 1 cm, the attraction between the pressure plate and the piston is equal to the sum of the weights of the piston, the card plate and the ejector rod. Then the pressure plate continues to move downward, and the distance between the pressure plate and the sleeve gradually decreases. During this process, the attraction between the piston and the pressure plate is greater than the sum of the weights of the piston, the ejector rod and the card plate, so the piston drives the card plate to move upward.

[0021] Then the pressure plate continues to move downward, and when the pressure plate contacts the bearing, the clamping plate contacts the bearing. At this time, the attraction between the pressure plate and the piston is greater than the sum of the weights of the piston, the ejector rod, the clamping plate and the bearing.

[0022] After the test is completed, the telescopic rod shrinks. At this time, the attraction between the pressure plate and the piston is greater than the sum of the weight of the piston, the push rod, the clamping plate and the bearing. Therefore, the upward pressure plate will drive the bearing to move upward.

[0023] Until the cardboard completely enters the card slot, the cardboard will be stuck in the card slot and cannot move because the card slot diameter gradually increases from top to bottom. At this time, the top wall of the cardboard and the top wall of the guide groove are in the same plane. At this time, the telescopic rod continues to shrink, and the hydraulic rod remains in an extended state. Therefore, the push rod can exert resistance on the inner ring of the bearing to prevent the bearing from being sucked by the magnetic pressure plate and moving together. At this time, the cardboard and the piston cannot move;

[0024] When the telescopic rod is gradually in the maximum contraction state, the hydraulic rod gradually contracts and drives the push rod to be pulled out from the inner ring of the bearing. At this time, the bearing can move freely. At the same time, the bearing will automatically roll from the surface of the pallet to the inclined guide groove, which reduces the operating steps of the staff and improves work efficiency.

[0025] The guide plate, the telescopic rod and the sleeve are all located on the side wall of the box body on the same side.

[0026] Furthermore, the driving mechanism includes a stepping motor fixedly mounted on the box body, and a bidirectional threaded rod is embedded in the guide plate for horizontal rotation, and the bidirectional threaded rod passes through two slide grooves;

[0027] The clamping plate is provided with screw holes matched with the bidirectional threaded rod, and the two clamping plates are symmetrically threadedly mounted on the bidirectional threaded rod through the screw holes.

[0028] When the bearing rolls along the guide groove, there is friction between the outer ring of the bearing and the guide groove. This friction will cause the moving direction of the bearing to change, resulting in the bearing being stuck in the guide groove and unable to move normally.

[0029] When the bearing rolls along the guide groove, the stepper motor is started and intermittently rotates forward and reverse, so that the two clamps symmetrically installed on the bidirectional threaded rod will approach or move away from each other; when the clamps approach each other, the clamps exert pressure on the part of the bearing located in the guide groove, forcibly aligning the bearing, thereby ensuring that the bearing can roll normally along the guide groove into the bayonet.

[0030] Among them, the stepper motor can intermittently rotate forward and reverse, which is a prior art and will not be described in detail.

[0031] Furthermore, the air supply mechanism includes an intake valve and an exhaust valve fixedly embedded on the top wall of the sleeve, a conduit extending into the cavity is fixedly installed on the output end of the exhaust valve, and a constant pressure hole is opened on the bottom wall of the sleeve, which is used to balance the pressure in the sleeve to ensure normal movement of the piston.

[0032] During the downward movement of the piston, the space below the piston in the sleeve draws air from the outside through the intake valve;

[0033] During the upward movement of the piston, the space above the piston in the sleeve is exhausted through the exhaust valve and the conduit, and the gas exhausted from the sleeve flows along the conduit into the cavity, thereby supplying air to the cavity.

[0034] Furthermore, the pressurizing mechanism includes a blocking plate slidably mounted on the top wall of the cavity, the blocking plate is used to block the air holes, and the blocking plate is provided with through holes corresponding to the air holes one by one;

[0035] A connecting rod is slidably inserted on the side wall of the cavity, and two ends of the connecting rod are fixedly connected with the blocking plate and the clamping plate respectively.

[0036] When the clamping plate does not squeeze the bearing, the portion of the surface of the blocking plate where no through hole is formed blocks the pores;

[0037] When the splint squeezes the bearing, the splint drives the blocking plate to move through the linkage rod, so that the through hole on the blocking plate is connected with the pore, and the gas in the cavity is discharged through the through hole and the pore; therefore, compared with the pore continuously exhausting gas outward, when the splint does not squeeze the bearing, the pore cannot exhaust gas, which reduces the loss of gas in the cavity and plays a role in extending the exhaust time of the pore;

[0038] At the same time, when the splint pushes the bearing, the through hole can be gradually connected with the pore. During this process, the overlapping area of ​​the through hole and the pore gradually increases, so the impact force of the gas discharged from the pore can be increased when the through hole does not completely overlap with the pore.

[0039] At the same time, under the impact force of the air flow discharged from the pores, when the outer ring of the bearing hits the edge of the bayonet, the impact force on the outer ring of the bearing and the edge of the bayonet is reduced, thereby protecting the edge of the bayonet during frequent inspections and ensuring that the bearing can be straightened.

[0040] Furthermore, the splint includes a mounting plate and an extension plate, the screw holes are opened on the mounting plate, and the extension plate is fixedly mounted on the side wall of the mounting plate, so that the mounting plate can drive the extension plate to move to the outside of the slide groove, so that the extension plate contacts the bearing, thereby ensuring that the bearing can be straightened.

[0041] Furthermore, a buffer pad made of elastic material is fixedly mounted on the top wall of the card plate.

[0042] The buffer pad is arranged on the top wall of the clamping plate, so when the bearing falls into the clamping slot, the bearing contacts the buffer pad first, and the deformation of the buffer pad can absorb the kinetic energy of the bearing, thereby reducing the impact force between the bearing and the clamping slot edge, and improving the protection effect on the bearing and the clamping slot edge.

[0043] Furthermore, the bottom wall of the pressure plate is an arc shape that matches the outer ring of the bearing, a threaded hole is provided on the top wall of the pressure plate, and a thread is provided on the output end of the telescopic rod; the pressure plate is threadedly installed on the telescopic rod through the threaded hole, so the pressure plate is removable. Therefore, when detecting bearings of different sizes, the pressure plate of the corresponding size can be replaced, thereby improving the fixing effect of the outer ring of the bearing, preventing the bearing from shaking during the detection process, and improving the accuracy of the detection.

[0044] The present invention also provides a detection method applicable to the above-mentioned bearing clearance detection device, comprising the following steps:

[0045] S1. Place the bearing to be tested in the guide groove, and make the side wall of the bearing on the flat side perpendicular to the bottom wall of the guide groove;

[0046] S2, the bearing to be tested rolls along the guide groove, and the driving mechanism drives the clamping plate to move, and the clamping plate pushes the bearing to make the bearing move stably along the guide groove;

[0047] S3. When the clamp pushes the bearing to align, the air in the cavity is exhausted outward through the air hole, exerting an upward impact force on the bearing;

[0048] S4, the bearing to be tested falls into the bayonet, and then the hydraulic rod is started to limit the movement of the bearing, and then the telescopic rod is driven, and the telescopic rod drives the pressure plate to squeeze the outer ring of the bearing. At this time, the outer ring of the bearing is fixed in the specified position through the bayonet and the pressure plate, and the sleeve supplies air to the cavity;

[0049] S5, the detection mechanism starts to detect the radial clearance of the bearing;

[0050] S6. After the test is completed, the transfer mechanism works to transfer the tested bearing.

[0051] Compared with the prior art, the present invention has the following beneficial effects:

[0052] (1) This solution is provided by setting a driving mechanism and a clamping plate; when the bearing rolls along the guide groove, the driving mechanism drives the two clamping plates to approach each other, and the clamping plates push the bearing, so that the bearing can be straightened, and the clamping plates have a deceleration effect when clamping the bearing, which ensures that the bearing can stably enter the bayonet.

[0053] (2) This scheme is provided with a cavity, an air hole, and an air supply mechanism; the air supply mechanism provides gas to the cavity, and the gas discharged from the air hole is pressurized by the pressurizing mechanism, so that the friction between the bearing and the bottom wall of the guide groove can be reduced when the splint forcibly pushes the bearing to align the bearing, thereby protecting the integrity of the outer wall of the bearing and the flatness of the guide groove, and ensuring that the bearing can roll normally into the bayonet.

[0054] (3) By providing a buffer pad, the present invention can absorb the kinetic energy of the bearing through the buffer pad made of elastic material, thereby reducing the impact force on the bearing and the edge of the bayonet when the bearing contacts the edge of the bayonet, thereby improving the protection effect of the edge of the bayonet, thereby preventing the edge of the bayonet from deforming, preventing the bearing from shaking during the detection process, and improving the detection accuracy. BRIEF DESCRIPTION OF THE DRAWINGS

[0055] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0056] Figure 2 It is a bottom view structural schematic diagram of the present invention;

[0057] Figure 3 It is a schematic cross-sectional structural diagram of the box body of the present invention;

[0058] Figure 4 It is a schematic diagram of the combined cross-sectional structure of the sleeve and the guide plate of the present invention;

[0059] Figure 5 It is a schematic cross-sectional structural diagram of the guide plate of the present invention;

[0060] Figure 6 It is a structural schematic diagram of the splint of the present invention;

[0061] Figure 7 It is a structural schematic diagram of the sealing plate of the present invention;

[0062] Figure 8 It is a combined diagram of the pressing plate and the telescopic rod of the present invention.

[0063] Description of the numbers in the figure:

[0064] 1. Box body; 2. Guide plate; 3. Guide groove; 4. Bayonet; 5. Telescopic rod; 6. Pressure plate; 7. Clamp; 701. Mounting plate; 702. Extension plate; 8. Cavity; 9. Air hole; 10. Through hole; 11. Hydraulic rod; 12. Electric guide rail; 13. Push rod; 14. Sleeve; 15. Push rod; 16. Card; 17. Piston; 18. Stepper motor; 19. Bidirectional threaded rod; 20. Intake valve; 21. Exhaust valve; 22. Conduit; 23. Blocking plate; 24. Through hole; 25. Linking rod; 26. Buffer pad. DETAILED DESCRIPTION

[0065] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention; it is obvious that the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments, and all other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making creative work are within the scope of protection of the present invention.

[0066] Embodiment 1:

[0067] See also Figures 1 to 8 , a bearing clearance detection device, comprising a housing 1;

[0068] A guide plate 2 is obliquely installed on the side wall of the box body 1, a guide groove 3 is provided on the guide plate 2, a bayonet 4 is provided on the bottom wall of the guide groove 3, and the cross-sectional area of ​​the bayonet 4 gradually increases from top to bottom;

[0069] A telescopic rod 5 is fixedly mounted on the side wall of the box body 1, and a pressing plate 6 is detachably mounted on the output end of the telescopic rod 5, and the pressing plate 6 is used to squeeze the bearing and fix the bearing in the bayonet 4; and a detection mechanism and a transfer mechanism that cooperate with the bearing are provided on the box body 1;

[0070] The side wall of the guide groove 3 is symmetrically provided with a slide groove, in which a clamping plate 7 is slidably installed, and the box body 1 is provided with a driving mechanism for driving the two clamping plates 7 to synchronously approach each other or synchronously move away from each other;

[0071] A cavity 8 is formed on the guide plate 2 , air holes 9 are evenly formed on the top wall of the cavity 8 , and an air supply mechanism for supplying air to the cavity 8 and a pressurizing mechanism for increasing the impact force of the airflow discharged from the air holes 9 are provided on the box body 1 .

[0072] The staff makes the side wall of the bearing on one side of the plane perpendicular to the bottom wall of the guide groove 3, and then places the bearing to be tested in the guide groove 3. At this time, the bearing rolls along the inclined guide groove 3. In the process of the bearing rolling along the guide groove 3, the driving mechanism drives the two clamps 7 to approach each other. In the process of the two clamps 7 approaching each other, the clamps 7 push the bearing, so that the bearing can be straightened, and the clamps 7 have a deceleration effect when clamping the bearing, which ensures that the bearing can stably enter the bayonet 4. At the same time, the air supply mechanism provides gas to the cavity 8, and pressurizes the gas discharged from the air hole 9 through the pressurizing mechanism, so that the friction between the bearing and the bottom wall of the guide groove 3 can be reduced in the process of the clamps 7 forcibly pushing the bearing to straighten the bearing, thereby protecting the integrity of the outer wall of the bearing and the flatness of the guide groove 3, and ensuring that the bearing can roll normally into the bayonet 4.

[0073] After the bearing rolls into the bayonet 4, the telescopic rod 5 is started, and the pressure plate 6 is driven by the output end of the telescopic rod 5 to squeeze the bearing. At this time, the outer ring of the bearing can be tightly fixed by the pressure plate 6 and the bayonet 4 on the guide plate 2; then the detection mechanism starts to work and detects the radial clearance. After the detection is completed, the bearing that has completed the detection can be automatically transferred under the action of the transfer mechanism, thereby preparing for work again.

[0074] During the whole process, it is only necessary to place the bearing in the guide groove 3 , and there is no need for the staff to accurately place the bearing in the bayonet 4 , which improves the work efficiency and the detection accuracy.

[0075] like Figure 3 As shown, the detection mechanism includes a through hole 10 opened on the side wall of the box body 1, a hydraulic rod 11 is fixedly installed in the box body 1, an electric guide rail 12 is installed on the output end of the hydraulic rod 11, and a push rod 13 is horizontally fixedly installed on the output end of the electric guide rail 12. The push rod 13 is used to push the inner ring of the bearing.

[0076] After the bearing to be tested falls into the bayonet 4, the hydraulic rod 11 is started, and the output end of the hydraulic rod 11 is extended to drive the electric guide rail 12 to move toward the direction close to the through hole 10, and the push rod 13 passes through the through hole 10 and the inner ring of the bearing, and then the telescopic rod 5 drives the pressure plate 6 to fix the bearing in the bayonet 4, and then the electric guide rail 12 is started, and the push rod 13 is driven up and down by the output end of the electric guide rail 12. The radial clearance of the bearing can be determined by the moving distance of the output end of the electric guide rail 12, wherein the radial clearance is measured by applying pressure to the inner ring of the bearing to make the inner ring of the bearing move radially, which is a prior art and will not be repeated here.

[0077] like Figure 4 As shown, the transfer mechanism includes a sleeve 14 fixedly mounted on the side wall of the box body 1, the sleeve 14 is located directly below the bayonet 4, a push rod 15 is vertically slidably inserted on the top wall of the sleeve 14, and a clamping plate 16 cooperating with the bayonet 4 is installed on the top of the push rod 15, that is, the cross-sectional area of ​​the clamping plate 16 gradually increases from top to bottom, and a piston 17 of magnetic material is slidably installed in the sleeve 14, and the ratio of the diameter of the piston 17 to the diameter of the push rod 15 is 2-3; the pressure plate 6 is a magnetic material that attracts the piston 17, and the attraction between the pressure plate 6 and the piston 17 is greater than the sum of the weight of the piston 17, the push rod 15, the clamping plate 16 and the bearing.

[0078] When the telescopic rod 5 is in the maximum contraction state, the pressure plate 6 is away from the sleeve 14. At this time, the sum of the gravity of the push rod 15, the clamping plate 16 and the piston 17 is greater than the attraction between the piston 17 and the pressure plate 6. Therefore, under the joint action of the push rod 15, the piston 17 and the clamping plate 16, the piston 17 is at the lowest point.

[0079] As the pressing plate 6 gradually moves downward, the pressing plate 6 gradually approaches the sleeve 14. When the distance between the bottom wall of the pressing plate 6 and the top wall of the bearing is 1 cm, the attraction between the pressing plate 6 and the piston 17 is equal to the sum of the weights of the piston 17, the clamping plate 16 and the push rod 15; then the pressing plate 6 continues to move downward, and the distance between the pressing plate 6 and the sleeve 14 gradually decreases. During this process, the attraction between the piston 17 and the pressing plate 6 is greater than the sum of the weights of the piston 17, the push rod 15 and the clamping plate 16, so the piston 17 drives the clamping plate 16 to move upward;

[0080] Then the pressing plate 6 continues to move downward, and when the pressing plate 6 contacts the bearing, the clamping plate 16 contacts the bearing. At this time, the attraction between the pressing plate 6 and the piston 17 is greater than the sum of the weight of the piston 17, the ejector rod 15, the clamping plate 16 and the bearing.

[0081] After the test is completed, the telescopic rod 5 is retracted. At this time, the attraction between the pressure plate 6 and the piston 17 is greater than the sum of the weight of the piston 17, the push rod 15, the clamping plate 16 and the bearing. Therefore, the upward pressure plate 6 will drive the bearing to move upward.

[0082] Until the clamping plate 16 completely enters the clamping port 4, since the diameter of the clamping port 4 gradually increases from top to bottom, the clamping plate 16 will be stuck in the clamping port 4 and cannot move. At this time, the top wall of the clamping plate 16 and the top wall of the guide groove 3 are in the same plane. At this time, the telescopic rod 5 continues to shrink, and the hydraulic rod 11 remains in the extended state. Therefore, the push rod 13 can apply resistance to the inner ring of the bearing to prevent the bearing from being attracted by the magnetic pressure plate 6 and moving together. At this time, the clamping plate 16 and the piston 17 cannot move;

[0083] When the telescopic rod 5 is gradually in the maximum contraction state, the hydraulic rod 11 gradually contracts and drives the push rod 13 to be pulled out from the inner ring of the bearing. At this time, the bearing can move freely. At the same time, the bearing will automatically roll from the surface of the clamping plate 16 to the inclined guide groove 3, which reduces the operating steps of the staff and improves the work efficiency.

[0084] The guide plate 2 , the telescopic rod 5 , and the sleeve 14 are all located on the side wall of the box body 1 on the same side.

[0085] like Figure 5 As shown, the driving mechanism includes a stepper motor 18 fixedly mounted on the box body 1, and a bidirectional threaded rod 19 is embedded in the guide plate 2 for horizontal rotation, and the bidirectional threaded rod 19 passes through two slide grooves;

[0086] The clamping plate 7 is provided with screw holes matched with the bidirectional threaded rod 19 , and the two clamping plates 7 are symmetrically threadedly installed on the bidirectional threaded rod 19 through the screw holes.

[0087] When the bearing rolls along the guide groove 3 , there is friction between the outer ring of the bearing and the guide groove 3 . The friction may cause the moving direction of the bearing to change, thereby causing the bearing to get stuck in the guide groove 3 and unable to move normally.

[0088] When the bearing rolls along the guide groove 3, the stepper motor 18 is started, and the stepper motor 18 intermittently rotates forward and reverse, so that the two clamps 7 symmetrically threaded on the bidirectional threaded rod 19 will approach each other or move away from each other; when the clamps 7 approach each other, the clamps 7 apply pressure to the part of the bearing located in the guide groove 3, forcibly aligning the bearing, thereby ensuring that the bearing can roll normally along the guide groove 3 into the bayonet 4.

[0089] The intermittent forward and reverse rotation of the stepper motor 18 is a prior art and will not be described in detail.

[0090] like Figure 5 As shown, the air supply mechanism includes an intake valve 20 and an exhaust valve 21 fixedly embedded on the top wall of the sleeve 14, a conduit 22 extending into the cavity 8 is fixedly installed on the output end of the exhaust valve 21, and a constant pressure hole is opened on the bottom wall of the sleeve 14, and the constant pressure hole is used to balance the pressure in the sleeve 14 to ensure the normal movement of the piston 17.

[0091] During the downward movement of the piston 17, the space below the piston 17 in the sleeve 14 draws air from the outside through the intake valve 20;

[0092] During the upward movement of the piston 17 , the space above the piston 17 in the sleeve 14 is exhausted through the exhaust valve 21 and the conduit 22 , and the gas exhausted from the sleeve 14 flows along the conduit 22 into the cavity 8 , thereby supplying air to the cavity 8 .

[0093] like Figure 5 , Figure 7 As shown, the pressurizing mechanism includes a blocking plate 23 slidably mounted on the top wall of the cavity 8, the blocking plate 23 is used to block the air holes 9, and the blocking plate 23 is provided with through holes 24 corresponding to the air holes 9 one by one;

[0094] A linking rod 25 is slidably inserted on the side wall of the cavity 8 , and two ends of the linking rod 25 are fixedly connected to the blocking plate 23 and the clamping plate 7 respectively.

[0095] When the clamping plate 7 does not squeeze the bearing, the portion of the surface of the blocking plate 23 where no through hole 24 is formed blocks the pore 9;

[0096] When the clamping plate 7 squeezes the bearing, the clamping plate 7 drives the blocking plate 23 to move through the linkage rod 25, so that the through hole 24 on the blocking plate 23 is connected with the air hole 9, and the gas in the cavity 8 is discharged through the through hole 24 and the air hole 9; therefore, compared with the air hole 9 continuously exhausting gas outwards, when the clamping plate 7 does not squeeze the bearing, the air hole 9 cannot exhaust gas, which reduces the loss of gas in the cavity 8 and plays a role in extending the exhaust time of the air hole 9;

[0097] At the same time, when the splint 7 pushes the bearing, the through hole 24 can be gradually connected with the air hole 9. During this process, the overlapping area between the through hole 24 and the air hole 9 gradually increases, so the impact force of the gas discharged from the air hole 9 can be increased when the through hole 24 does not completely overlap with the air hole 9.

[0098] At the same time, under the impact force of the airflow discharged from the air hole 9, when the outer ring of the bearing hits the edge of the bayonet 4, the impact force on the outer ring of the bearing and the edge of the bayonet 4 is reduced, thereby protecting the edge of the bayonet 4 during frequent inspections and ensuring that the bearing can be straightened.

[0099] like Figure 5 , Figure 6 As shown, the clamping plate 7 includes a mounting plate 701 and an extension plate 702. The screw holes are opened on the mounting plate 701, and the extension plate 702 is fixedly mounted on the side wall of the mounting plate 701. Therefore, the mounting plate 701 can drive the extension plate 702 to move to the outside of the slide groove, so that the extension plate 702 contacts the bearing, which plays a role in ensuring that the bearing can be straightened.

[0100] like Figure 4 As shown, a buffer pad 26 made of elastic material is fixedly mounted on the top wall of the clamping plate 16 .

[0101] The buffer pad 26 is arranged on the top wall of the clamping plate 16, so when the bearing falls into the clamping port 4, the bearing first contacts the buffer pad 26, at which time the buffer pad 26 deforms to absorb the kinetic energy of the bearing, thereby reducing the impact force between the bearing and the edge of the clamping port 4, and improving the protection effect on the bearing and the edge of the clamping port 4.

[0102] like Figure 2 As shown, the bottom wall of the pressure plate 6 is an arc shape adapted to the outer ring of the bearing, a threaded hole is provided on the top wall of the pressure plate 6, and a thread is provided on the output end of the telescopic rod 5; the pressure plate 6 is threadedly installed on the telescopic rod 5 through the threaded hole, so the pressure plate 6 is detachable. Therefore, when detecting bearings of different sizes, the pressure plate 6 of the corresponding size can be replaced, thereby improving the fixing effect of the outer ring of the bearing, preventing the bearing from shaking during the detection process, and improving the accuracy of the detection.

[0103] The present invention also provides a detection method applicable to the above-mentioned bearing clearance detection device, comprising the following steps:

[0104] S1, placing the bearing to be tested in the guide groove 3, and making the side wall of the bearing on the plane side perpendicular to the bottom wall of the guide groove 3;

[0105] S2, the bearing to be tested rolls along the guide groove 3, and the driving mechanism drives the clamping plate 7 to move, and the clamping plate 7 pushes the bearing to move stably along the guide groove 3;

[0106] S3, when the clamping plate 7 pushes the bearing to align, the cavity 8 exhausts air outwards through the air hole 9, exerting an upward impact force on the bearing;

[0107] S4, the bearing to be tested falls into the bayonet 4, and then the hydraulic rod 11 is started to limit the movement of the bearing, and then the telescopic rod 5 is driven, and the telescopic rod 5 drives the pressure plate 6 to squeeze the outer ring of the bearing. At this time, the outer ring of the bearing is fixed at the specified position through the bayonet 4 and the pressure plate 6, and the sleeve 14 supplies air to the cavity 8;

[0108] S5, the detection mechanism starts to detect the radial clearance of the bearing;

[0109] S6. After the test is completed, the transfer mechanism works to transfer the tested bearing.

[0110] The above is only a preferred specific implementation of the present invention; however, the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical solution and its improved conception within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A bearing clearance detection device, comprising a housing (1); Features: A guide plate (2) is obliquely mounted on the side wall of the box body (1), a guide groove (3) is provided on the guide plate (2), a bayonet (4) is provided on the bottom wall of the guide groove (3), and the cross-sectional area of ​​the bayonet (4) gradually increases from top to bottom; A telescopic rod (5) is fixedly mounted on the side wall of the box body (1); a pressing plate (6) is detachably mounted on the output end of the telescopic rod (5); the pressing plate (6) is used to press the bearing; and a detection mechanism and a transfer mechanism that cooperate with the bearing are provided on the box body (1); The side wall of the guide groove (3) is symmetrically provided with a slide groove, a clamping plate (7) is slidably installed in the slide groove, and the box body (1) is provided with a driving mechanism for driving the two clamping plates (7) to move synchronously; The guide plate (2) is provided with a cavity (8), the top wall of the cavity (8) is evenly provided with air holes (9), and the box body (1) is provided with an air supply mechanism for supplying air to the cavity (8) and a pressurizing mechanism for increasing the impact force of the air flow discharged from the air holes (9).

2. A bearing clearance detection device according to claim 1, characterized in that: The detection mechanism comprises a through hole (10) formed on a side wall of a box body (1), a hydraulic rod (11) is fixedly mounted in the box body (1), an electric guide rail (12) is mounted on the output end of the hydraulic rod (11), and a push rod (13) is horizontally fixedly mounted on the output end of the electric guide rail (12).

3. A bearing clearance detection device according to claim 2, characterized in that: The transfer mechanism comprises a sleeve (14) fixedly mounted on the side wall of the box body (1), the sleeve (14) being located directly below the bayonet (4), a push rod (15) being vertically slidably inserted on the top wall of the sleeve (14), a clamping plate (16) cooperating with the bayonet (4) being mounted on the top end of the push rod (15), a piston (17) made of a magnetic material being slidably mounted in the sleeve (14), the pressure plate (6) being made of a magnetic material, and the pressure plate (6) and the piston (17) attract each other.

4. A bearing clearance detection device according to claim 3, characterized in that: The driving mechanism comprises a stepping motor (18) fixedly mounted on the box body (1); a bidirectional threaded rod (19) is horizontally rotatably embedded on the guide plate (2); the bidirectional threaded rod (19) passes through two slide grooves; The clamping plate (7) is provided with a screw hole matched with the bidirectional threaded rod (19), and the two clamping plates (7) are symmetrically threadedly mounted on the bidirectional threaded rod (19) through the screw hole.

5. A bearing clearance detection device according to claim 4, characterized in that: The air supply mechanism comprises an air inlet valve (20) and an air exhaust valve (21) fixedly embedded on the top wall of the sleeve (14); a conduit (22) extending into the cavity (8) is fixedly mounted on the output end of the air exhaust valve (21).

6. A bearing clearance detection device according to claim 5, characterized in that: The pressurizing mechanism comprises a blocking plate (23) slidably mounted on the top wall of the cavity (8), the blocking plate (23) being used to block the air holes (9), and the blocking plate (23) is provided with through holes (24) corresponding one to one with the air holes (9); A linking rod (25) is slidably inserted on the side wall of the cavity (8), and two ends of the linking rod (25) are respectively fixedly connected to the blocking plate (23) and the clamping plate (7).

7. A bearing clearance detection device according to claim 6, characterized in that: The clamping plate (7) comprises a mounting plate (701) and an extension plate (702), the screw holes are provided on the mounting plate (701), and the extension plate (702) is fixedly mounted on the side wall of the mounting plate (701).

8. A bearing clearance detection device according to claim 7, characterized in that: A buffer pad (26) made of elastic material is fixedly mounted on the top wall of the clamping plate (16).

9. A bearing clearance detection device according to claim 8, characterized in that: The bottom wall of the pressing plate (6) is in an arc shape that matches the outer ring of the bearing, a threaded hole is provided on the top wall of the pressing plate (6), and a thread is provided on the output end of the telescopic rod (5).

10. A detection method for a bearing clearance detection device according to any one of claims 1 to 9, characterized in that: The steps include: S1. Place the bearing to be tested in the guide groove (3), and make the side wall of the bearing on the flat side perpendicular to the bottom wall of the guide groove (3); S2, the bearing to be tested rolls along the guide groove (3), and the driving mechanism drives the clamping plate (7) to move, and the clamping plate (7) pushes the bearing so that the bearing moves stably along the guide groove (3); S3, when the clamping plate (7) pushes the bearing to align, the cavity (8) exhausts air outwards through the air hole (9), exerting an upward impact force on the bearing; S4, the bearing to be tested falls into the bayonet (4), and then the hydraulic rod (11) is started to limit the movement of the bearing through the hydraulic rod (11), and then the telescopic rod (5) is driven, and the telescopic rod (5) drives the pressure plate (6) to squeeze the outer ring of the bearing. At this time, the outer ring of the bearing is fixed at a specified position through the bayonet (4) and the pressure plate (6), and at the same time, the sleeve (14) supplies air to the cavity (8); S5, the detection mechanism starts to detect the radial clearance of the bearing; S6. After the test is completed, the transfer mechanism works to transfer the tested bearing.

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