A Measuring Instrument and Method for Measuring the Inner Diameter of a Bearing Ring

Abstract

The present invention relates to the technical field of bearing ring measurement, and specifically to an inner diameter measuring instrument and a measuring method for a bearing ring, including: an L-shaped base, on the upper end surface of the horizontal section of the base, a moving frame is slidably arranged left and right, a rectangular plate is fixedly arranged on the left end surface of the moving frame, and a measuring mechanism is arranged between the rectangular plate and the moving frame. First, the present invention emits laser through the laser emitter in the laser ranging device and receives it by the laser receiver, and finally obtains the distance between the two points. The required inner diameter value of the measurement point is obtained by adding this distance to twice the distance from the fixed block to the corresponding ball. The point contact between the ball and the inner wall of the ring reduces the error of the measurement result. Secondly, during the rightward movement of the transverse movement block by the equidistant group, multiple measurements of the inner diameter of the ring are completed from left to right. And by rotating the rotating plate and the ring, the outer ring rod is matched with the locking holes at different positions, so as to realize multi-point inner diameter measurement at different positions of the inner wall of the ring.

Description

Technical Field

[0001] The invention relates to the technical field of bearing ring measurement, in particular to a bearing ring inner diameter measuring instrument and a measuring method. Background Art

[0002] Large bearing rings are key components for manufacturing large bearings and are usually used in heavy-load and high-precision mechanical systems. Accurate measurement of the inner diameter of the bearing ring is crucial to ensuring the reliability and service life of the bearing. Accurate inner diameter dimensions of large bearing rings can improve the assembly accuracy of large bearings, ensure operating performance, and extend service life.

[0003] At present, large bearing rings are measured by laser ranging equipment. The laser ranging equipment adopts non-contact measurement method and will not produce any physical contact with the bearing rings to avoid damage or deformation caused by contact. At the same time, the laser ranging equipment can achieve sub-micron level measurement accuracy, high measurement dimensional accuracy, fast measurement speed and simple operation.

[0004] However, the following defects still exist in the inner diameter measurement process of large bearing rings (hereinafter referred to as rings): a single-point measurement method is usually used to measure the inner diameter of the ring. The results produced by this measurement method are accidental and insufficient to reflect the real actual data; secondly, during the inner diameter measurement process, the laser ranging device needs to move along the axis of the ring, but during the actual movement process, the laser ranging device only moves in the specified direction, and the movement process of the laser ranging device is not limited and guided, so the running straightness and measurement verticality of the laser ranging device cannot be guaranteed, which increases the probability of measurement errors and reduces the measurement accuracy. Summary of the invention

[0005] Based on this, it is necessary to provide a bearing ring inner diameter measuring instrument and a measuring method, aiming to solve the above-mentioned problems of the prior art.

[0006] The present application provides a bearing ring inner diameter measuring instrument, comprising: an L-shaped base, a movable frame is slidably arranged on the upper end surface of the horizontal section of the base, a rectangular plate is fixedly arranged on the left end surface of the movable frame, and a measuring mechanism is arranged between the rectangular plate and the movable frame.

[0007] A clamping unit is arranged on the vertical section of the base, and the clamping unit includes a rotating plate. A rotating plate is installed on the vertical section of the base so as to rotate and penetrate the base to the left and right, and the axis of the rotating plate is colinear with the center line of the rectangular plate. A plurality of sliding blocks evenly distributed in the circumferential direction are slidingly arranged on the rotating plate, and an arc-shaped clamping plate is fixedly arranged on the right end face of the sliding block, and the inner arc surfaces of all the clamping plates are facing the center line of the rectangular plate.

[0008] The measuring mechanism includes a transverse movement block. Transverse movement blocks are slidably arranged left and right on both the upper and lower end faces of the rectangular plate. Fixed columns with axes extending from front to back are fixedly arranged on the front and rear end faces of the two transverse movement blocks. L-shaped plates are slidably sleeved on the fixed columns in the front and rear directions. A first spring sleeved on the fixed column is fixedly arranged between the L-shaped plate and the transverse movement block. A fixed block is fixedly arranged between the two relatively upper and lower L-shaped plates. Ball bearings for tightly abutting against the inner wall of the ferrule are movably arranged on the opposite faces of the two fixed blocks. A laser ranging device is arranged on the opposite faces of the two fixed blocks. An avoidance groove that penetrates through from front to back and is used for avoiding the ranging laser is formed in the rectangular plate.

[0009] According to an advantageous embodiment, the clamping unit further includes a sliding column. A sliding column with an axis extending left and right is slidably installed through the center of the rotating plate left and right. A central block is fixedly arranged on the left end face of the sliding column. Articulation bars are jointly and hingedly arranged between the central block and all the sliding blocks. A second spring sleeved on the sliding column is fixedly arranged between the left end face of the vertical section of the base and the central block.

[0010] According to an advantageous embodiment, the clamping unit further includes a reference block. Reference blocks are fixedly arranged on the inner arc surfaces of the plurality of clamping plates, and all the reference blocks are circumferentially distributed about the axis of the rotating plate. The reference block is Z-shaped, and the vertical section on the right side of the reference block closely abuts against the ferrule.

[0011] According to an advantageous embodiment, the measuring mechanism further includes a docking plate. A docking plate with an axis collinear with the axis of the rotating plate is rotatably arranged on the right end face of the rotating plate. The sliding column slidably penetrates through the docking plate. Two docking columns that are distributed up and down and have axes extending from left to right are fixedly arranged on the right end face of the docking plate. Docking grooves corresponding to the docking columns one by one are formed on the left end face of the rectangular plate.

[0012] According to an advantageous embodiment, the measuring mechanism further includes outer ring rods. Two upper and lower symmetric outer ring rods with axes extending left and right are slidably installed through the moving frame left and right. The outer ring rods are located on the side of the clamping plate away from the center of the rotating plate. A plurality of locking holes corresponding to the clamping plates one by one are formed through the rotating plate left and right, and the outer ring rods penetrate through the corresponding locking holes.

[0013] According to an advantageous embodiment, a pressing block located on the left side of the moving frame is fixedly sleeved on the outer ring rod through a connecting bar. The two pressing blocks are upper and lower symmetric. The pressing block is Z-shaped, and the left vertical section of the pressing block closely abuts against the right end face of the ferrule.

[0014] According to an advantageous embodiment, side vertical plates are fixedly arranged on the opposite surfaces of the two transverse moving blocks. A horizontal column with a left-right extending axis is slidably mounted left and right on the side vertical plate and penetrates through the side vertical plate. A through groove is formed in the right vertical section of the pressing block. The horizontal column penetrates through the corresponding through groove, and the right end portion of the horizontal column is a threaded section. A nut located on the right side of the pressing block is threadedly mounted on the threaded section of the horizontal column. A fitting groove is formed in the left vertical section of the reference block. The fitting groove sequentially includes a first rectangular section, an arc section with the same diameter as the horizontal column, and a second rectangular section from front to back. A fitting block is fixedly arranged on the left end surface of the horizontal column.

[0015] According to an advantageous embodiment, a locking group is jointly arranged between the rotating plate and the vertical section of the base. The locking group includes a groove. A plurality of hemispherical grooves distributed circumferentially are formed in the left end surface of the rotating plate. A fixing frame is fixedly arranged on the left end surface of the vertical section of the base. A pressing column is slidably mounted left and right on the fixing frame and penetrates through the fixing frame. A clamping ball is fixedly arranged on the right end surface of the pressing column. A third spring sleeved on the pressing column is jointly fixedly arranged between the clamping ball and the fixing frame.

[0016] According to an advantageous embodiment, an equidistant group is jointly arranged on the two transverse moving blocks and the moving frame. The equidistant group includes a push rod. A push rod with a left-right extending axis is rotatably arranged on the right end surface of the transverse moving block and movably penetrates through the moving frame. A plurality of card slots are arranged at equal intervals along the length direction of the push rod. A spring telescopic rod with a front-back extending axis is fixedly arranged on the right end surface of the moving frame through a mounting plate. A clamping plate is fixedly arranged at the telescopic end of the spring telescopic rod. A push plate located on the right side of the clamping plate is jointly rotatably sleeved on the two push rods. The two push rods are connected by a sprocket chain. A scroll spring is jointly fixedly arranged between the push rod and the push plate. A rotating rod is fixedly arranged on the right end surface of the upper push rod.

[0017] In summary, the present invention includes at least one of the following beneficial effects: First, the present invention first emits laser through a laser emitter in the laser ranging device and receives it by a laser receiver, and finally obtains the distance between the two points. The required inner diameter value of the measurement point is obtained by adding this distance to twice the distance from the fixed block to the corresponding ball. The point contact between the ball and the inner wall of the ferrule reduces the error of the measurement result. Secondly, during the rightward movement of the transverse moving block by the equidistant group, multiple measurements of the inner diameter of the ferrule from left to right are completed. By rotating the rotating plate and the ferrule, the outer ring rod is matched with the locking holes at different positions, so as to realize multi-point inner diameter measurement at different positions on the inner wall of the ferrule. After obtaining multiple groups of results, the average value is taken, thereby further reducing the error in the measurement process and improving the accuracy of the measurement result.

[0018] 2. The clamping block, the corresponding reference block on the left side and the horizontal column in the present invention are fixed to each other, and the clamping block and the reference block cooperate with each other to clamp and clamp the ring in the left and right directions. At the same time, the outer ring rod, the clamping block, the horizontal column, the vertical section of the base and the movable frame together form a corresponding rectangular frame, thereby improving the stability and horizontality of the measurement process in the subsequent measurement process when the transverse block and the side plate move right along the length direction of the horizontal column to further improve the accuracy of the measurement.

[0019] 3. In the process of the mobile frame moving to the left, the present invention connects with the corresponding docking column through the docking groove on the rectangular plate, so that the mobile frame, the vertical section of the base and the rectangular plate are integrated, ensuring the horizontality of the rectangular plate, and then ensuring the horizontality of the laser ranging equipment driven by the transverse block when moving right, improving the stability of the transverse block moving right during the measurement process, and further improving the accuracy of the measurement. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying creative work.

[0021] Figure 1 The schematic diagram shows the structure of the base after being cut off according to the present invention.

[0022] Figure 2 A partial structural schematic diagram of the present invention is shown.

[0023] Figure 3 A partial cross-sectional view of the present invention is shown.

[0024] Figure 4 Shows Figure 3 Enlarged view of point A in the middle.

[0025] Figure 5 Shows Figure 3 Enlarged view of point B in the middle.

[0026] Figure 6 A schematic diagram of the three-dimensional structure among the moving frame, the clamping plate and the rectangular plate of the present invention is shown.

[0027] Figure 7 Shows Figure 6 Enlarged view of point C in the middle.

[0028] Figure 8 A schematic diagram of the three-dimensional structure among the push plate, the push rod and the clamping plate of the present invention is shown.

[0029] Among them, the above-mentioned drawings include the following reference numerals: 1, base; 2, moving frame; 3, rectangular plate; 4, clamping unit; 40, rotating plate; 400, sliding block; 401, clamping plate; 41, sliding column; 410, central block; 411, hinged strip; 412, second spring; 42, reference block; 5, measuring mechanism; 50, transverse moving block; 500, fixed column; 501, L-shaped plate; 502, first spring; 503, fixed block; 504, ball; 505, laser distance measuring device; 506, avoidance groove; 51, docking plate; 510, docking column; 511, docking groove; 52, outer ring rod; 520, locking hole; 53, pressing block; 54, side vertical plate; 540, horizontal column; 541, through groove; 542, nut; 543, mating groove; 544, mating block; 55, locking group; 550, groove; 551, fixed frame; 552, clamping ball; 553, third spring; 56, equidistant group; 560, push rod; 561, clamping groove; 562, spring telescopic rod; 563, clamping plate; 564, push plate; 565, scroll spring; 566, rotating rod. Detailed implementation manners

[0030] In order to make the above objects, features and advantages of the present invention more obvious and understandable, the following will describe in detail the specific implementation manners of the present invention with reference to the drawings. Many specific details are set forth in the following description in order to fully understand the present invention. However, the present invention can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without departing from the connotation of the present invention. Therefore, the present invention is not limited by the specific embodiments disclosed below.

[0031] As Figure 1 、 Figure 2 And Figure 3 shown, an inner diameter measuring instrument for a bearing ring includes: an L-shaped base 1, a moving frame 2 is slidably arranged on the upper end surface of the horizontal section of the base 1, and the moving frame 2 is driven by an external hydraulic cylinder (not shown in the figure) to move left and right. A rectangular plate 3 is fixedly arranged on the left end surface of the moving frame 2, and a measuring mechanism 5 is arranged between the rectangular plate 3 and the moving frame 2.

[0032] As Figure 1 、 Figure 2 And Figure 3 shown, a clamping unit 4 is arranged on the vertical section of the base 1. The clamping unit 4 includes a rotating plate 40. The rotating plate 40 is rotatably and horizontally penetrated and installed on the vertical section of the base 1, and the axis of the rotating plate 40 is collinear with the center line of the rectangular plate 3. A plurality of circumferentially uniformly distributed sliding blocks 400 are slidably arranged on the rotating plate 40. An arc-shaped clamping plate 401 is fixedly arranged on the right end surface of the sliding block 400, and the inner arc surfaces of all the clamping plates 401 face the center line of the rectangular plate 3.

[0033] AsFigure 1 , Figure 2 , Figure 3 and Figure 4 As shown in Figure 3 , Figure 4 , etc., the measuring mechanism 5 includes a transverse moving block 50. The transverse moving blocks 50 are slidably arranged left and right on the upper and lower end faces of the rectangular plate 3. Fixed columns 500 with axes extending from front to back are fixedly arranged on the front and rear end faces of the two transverse moving blocks 50. An L-shaped plate 501 is slidably sleeved on the fixed column 500 in the front and rear directions. A first spring 502 sleeved on the fixed column 500 is fixedly arranged between the L-shaped plate 501 and the transverse moving block 50. A fixed block 503 is fixedly arranged between the two relatively upper and lower L-shaped plates 501. Ball bearings 504 for tightly pressing against the inner wall of the ferrule are movably arranged on the opposite surfaces of the two fixed blocks 503. A laser ranging device 505 is arranged on the opposite surfaces of the two fixed blocks 503. An avoidance groove 506 that penetrates from front to back and is used to avoid ranging laser is formed on the rectangular plate 3.

[0034] It should be noted that the laser ranging device 505 includes existing external laser emitters, laser receivers, signal processing units, etc. The laser emitter and the laser receiver are respectively arranged on the opposite surfaces of the two fixed blocks 503. Secondly, the distance between the fixed block 503 and the corresponding ball bearing 504 is a fixed value.

[0035] During operation, the staff uses external equipment (such as a lifting device) to place the bearing ferrule to be measured for inner diameter on the right side of the vertical section of the base 1, and makes all the clamping plates 401 located outside the ferrule. The external hydraulic cylinder works to drive the moving frame 2 and the rectangular plate 3 to move leftward. During this process, the clamping plates 401 in the clamping unit 4 clamp and fix the ferrule, and make the axis of the ferrule coincide with the center line of the rectangular plate 3 and the axis of the rotating plate 40. Then, the two transverse moving blocks 50 are moved. The transverse moving blocks 50 drive the fixed blocks 503 and the ball bearings 504 thereon to move into the ferrule. When the ball bearings 504 contact the inner wall of the ferrule, the first spring 502 is in a compressed state. The elastic force generated by the deformation of the first spring 502 makes the fixed blocks 503 and the ball bearings 504 tightly adhere to the inner wall of the ferrule. Then, the transverse moving blocks 50 are moved rightward. The transverse moving blocks 50 drive the fixed blocks 503 to move synchronously. During the movement, the ball bearings 504 always tightly adhere to the inner wall of the ferrule. When moving to a certain measurement point, the laser emitter in the laser ranging device 505 emits laser, and the laser is received by the laser receiver. Finally, the distance between the two points is obtained. The inner diameter value required at this measurement point is obtained by adding this distance to twice the distance between the fixed block 503 and the corresponding ball bearing 504. The transverse moving blocks 50 are moved rightward to multiple measurement points, and the above measurement process is repeated. After obtaining multiple groups of data, the average value is taken.

[0036] Such as Figure 1 , Figure 2 and Figure 3As shown, the clamping unit 4 further includes a sliding column 41. A sliding column 41 with a left - right extending axis is slidably installed through the center of the rotating plate 40 from left to right. A central block 410 is fixedly arranged at the left end face of the sliding column 41. Hinge bars 411 are jointly hinged between the central block 410 and all the sliding blocks 400. A second spring 412 sleeved on the sliding column 41 is jointly fixed between the left end face of the vertical section of the base 1 and the central block 410.

[0037] As Figure 1 , Figure 2 , Figure 3 and Figure 6 As shown, the clamping unit 4 further includes a reference block 42. The inner arc surfaces of a plurality of the clamping plates 401 are all fixedly provided with reference blocks 42, and all the reference blocks 42 are circumferentially distributed about the axis of the rotating plate 40. The reference block 42 is Z - shaped, and the vertical section on the right side of the reference block 42 closely adheres to the ferrule.

[0038] During operation, when the external hydraulic cylinder works, the moving frame 2 drives the rectangular plate 3 to move leftward synchronously. During the leftward movement of the rectangular plate 3, its left end face contacts the sliding column 41, and as it continues to move, it squeezes the sliding column 41. The sliding column 41 drives the central block 410 to move leftward synchronously, and the second spring 412 is stretched. The central block 410 pulls the corresponding sliding block 400 through the hinge bar 411. Therefore, all the sliding blocks 400 drive the clamping plates 401 to move synchronously closer to the central position of the rotating plate 40, that is, all the clamping plates 401 cooperate with each other to externally clamp and fix the ferrule, making the axis of the ferrule collinear with the axis of the rotating plate 40, improving the stability during the subsequent measurement process. Secondly, after the measurement is completed, the external hydraulic cylinder works to make the moving frame 2 move rightward to reset, and the elastic force generated by the deformation of the second spring 412 makes the central block 410 drive all the clamping plates 401 to reset, releasing the clamping and fixing of the ferrule.

[0039] When manually placing the ferrule, the left end face of the ferrule is made to closely adhere to the right side of the reference block 42, which is convenient for subsequent stable clamping of the ferrule and takes the right side of the reference block 42 as the reference starting point for left - right movement measurement, improving the convenience of the measurement process.

[0040] As Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown, the measuring mechanism 5 further includes a docking plate 51. A docking plate 51 with an axis collinear with the axis of the rotating plate 40 is rotatably arranged on the right end face of the rotating plate 40. The sliding column 41 slidably penetrates through the docking plate 51. Two docking columns 510 distributed vertically and with an axis extending from left to right are fixedly arranged on the right end face of the docking plate 51. Docking grooves 511 corresponding to the docking columns 510 one by one are opened on the left end face of the rectangular plate 3.

[0041] As Figure 1 ,Figure 2 , Figure 3 and Figure 4 As shown in Figure 2 , Figure 3 and Figure 4 , the measuring mechanism 5 further includes outer ring rods 52. Two outer ring rods 52 that are vertically symmetric and have axes extending left and right are slidably mounted on the moving frame 2 from left to right and penetrate through the moving frame 2. The outer ring rods 52 are located on the side of the clamping plate 401 away from the center of the rotating plate 40. A plurality of locking holes 520 corresponding to the clamping plate 401 one by one are penetrated through the rotating plate 40 from left to right, and the outer ring rods 52 penetrate through the corresponding locking holes 520.

[0042] During the process of the moving frame 2 moving leftward, the docking groove 511 on the rectangular plate 3 is docked with the corresponding docking post 510, and the docking post 510 is snapped into the docking groove 511. Therefore, the moving frame 2, the vertical section of the base 1, and the rectangular plate 3 form a whole, ensuring the levelness of the rectangular plate 3, that is, ensuring the levelness during the rightward movement of the cross-slide block 50 driving the laser distance measuring device 505, improving the stability of the rightward movement of the cross-slide block 50 during the measurement process, reducing the error during the measurement process, and the moving frame 2 continues to move leftward to complete the clamping and fixing process of the ferrule.

[0043] After that, manually move the outer ring rod 52 to the left so that the outer ring rod 52 is snapped into the locking hole 520 at the corresponding position on the rotating plate 40, and the rotating plate 40 is fixed through the above operation to prevent the measurement result from being affected by the rotation of the rotating plate 40 and the ferrule during the subsequent measurement process; during the measurement process of changing the position, the outer ring rod 52 is separated from the current locking hole 520, and by rotating the rotating plate 40, the rotating plate 40 drives the clamped and fixed ferrule to rotate a specified angle, and the outer ring rod 52 is matched with the corresponding locking hole 520 at this time. By measuring the inner diameter at different positions on the inner wall of the ferrule at multiple points, multiple groups of results are obtained, and then the average value of the results is taken, thereby reducing the error during the measurement process and improving the accuracy of the measurement result.

[0044] As Figure 1 and Figure 6 shown, a pressing block 53 located on the left side of the moving frame 2 is fixedly sleeved on the outer ring rod 52 through a connecting bar. The two pressing blocks 53 are vertically symmetric. The pressing block 53 is Z-shaped, and the left vertical section of the pressing block 53 is in close contact with the right end face of the ferrule.

[0045] As Figure 1 , Figure 2 , Figure 4 , Figure 6 and Figure 7As shown, on the opposite sides of the two transverse moving blocks 50, vertical side plates 54 are fixedly arranged. Horizontally extending horizontal columns 540 with a left-right axis are slidably mounted on the side plates 54 and penetrate through them. A through groove 541 is formed in the right vertical section of the pressing block 53. The horizontal column 540 penetrates through the corresponding through groove 541, and the right end portion of the horizontal column 540 is a threaded section. A nut 542 located on the right side of the pressing block 53 is threadedly mounted on the threaded section of the horizontal column 540. A mating groove 543 is formed in the left vertical section of the reference block 42. The mating groove 543 includes a first rectangular section, an arc section with the same diameter as the horizontal column 540, and a second rectangular section in sequence from front to back. A mating block 544 is fixedly arranged on the left end face of the horizontal column 540.

[0046] In the initial state, the transverse moving block 50 is located at the leftmost position within its left-right movement range. During the leftward movement of the rectangular plate 3, the rectangular plate 3 drives the transverse moving block 50 and the side plate 54 to move leftward synchronously. The side plate 54 and the horizontal column 540 thereon move leftward. The horizontal column 540 is rotated in advance so that the mating block 544 on the horizontal column 540 is in a horizontal state. Therefore, the horizontal column 540 drives the mating block 544 to move leftward through the corresponding mating groove 543, and then the mating block 544 is rotated in the reverse direction so that the mating block 544 is rotated to a vertical state. Thus, the installation process on the left side of the horizontal column 540 is completed; then the outer ring rod 52 is moved leftward, so that the outer ring rod 52 drives the pressing block 53 to move leftward synchronously. Finally, the left end face of the left vertical section of the pressing block 53 abuts against the ferrule. Immediately afterwards, the nut 542 is manually tightened so that the pressing block 53, the corresponding reference block 42 on the left side, and the horizontal column 540 are fixed to each other, and the pressing block 53 and the reference block 42 cooperate to clamp the left and right ends of the ferrule. At this time, the outer ring rod 52, the reference block 42, the horizontal column 540, the vertical section of the base 1, and the moving frame 2 jointly form a corresponding rectangular frame. Therefore, during the subsequent rightward movement of the transverse moving block 50 and the side plate 54 along the length direction of the horizontal column 540 for measurement, the smoothness and horizontality during the measurement process are improved, and the error during the measurement process is reduced.

[0047] As Figure 3 、 Figure 5 and Figure 6 shown, a locking group 55 is jointly arranged between the rotating plate 40 and the vertical section of the base 1. The locking group 55 includes a groove 550. A plurality of hemispherical grooves 550 distributed circumferentially are formed on the left end face of the rotating plate 40. A fixing frame 551 is fixedly arranged on the left end face of the vertical section of the base 1. A pressing column is slidably mounted on the fixing frame 551 and penetrates through it. A clamping ball 552 is fixedly arranged on the right end face of the pressing column. A third spring 553 sleeved on the pressing column is jointly fixedly arranged between the clamping ball 552 and the fixing frame 551.

[0048] In the initial state, the set catch ball 552 is located within the corresponding groove 550, and the third spring 553 is in a compressed state. The elastic force generated by the compression deformation of the third spring 553 causes the catch ball 552 to press against the inner wall of the groove 550, thereby initially fixing the rotating plate 40 and facilitating the subsequent operations of placing and clamping the ferrule. When it is necessary to replace the measured inner wall area of the ferrule, manually rotate to remove the nut 542 and move the outer ring rod 52 to the right, so that the outer ring rod 52 exits the locking hole 520, releasing the locking of the rotating plate 40. Then rotate the rotating plate 40 so that the rotating plate 40 drives the ferrule to rotate by a specified angle, and make another locking hole 520 face the outer ring rod 52. Then insert and cooperate the locking hole 520 with the outer ring rod 52, reinstall the nut 542, and then perform the measurement process of this area of the inner wall of the ferrule.

[0049] During the rotation process of the above-mentioned rotating plate 40, the catch ball 552 will move out of the groove 550, and the third spring 553 will continue to be compressed. When the position adjustment of the ferrule is completed, the catch ball 552 faces another groove 550. The elastic force generated by the compression of the third spring 553 causes the catch ball 552 to be reinserted into the corresponding groove 550, continuing to initially fix the rotating plate 40. Through the above method, it is convenient to determine the rotation angle of the rotating plate 40, guide the docking and installation process of the corresponding locking hole 520 and the outer ring rod 52, and at the same time assist the fixing and locking process of the rotating plate 40.

[0050] As Figure 1 、 Figure 6 and Figure 8 shown, an equidistant group 56 is jointly arranged on the two transverse movement blocks 50 and the moving frame 2. The equidistant group 56 includes a push rod 560. The right end face of the transverse movement block 50 is rotatably provided with a push rod 560 whose axis extends from left to right and movably penetrates through the moving frame 2. A plurality of card slots 561 are arranged at equal intervals along the length direction of the push rod 560. The right end face of the moving frame 2 is fixedly provided with a spring telescopic rod 562 whose axis extends from front to back through a mounting plate. The telescopic end of the spring telescopic rod 562 is fixedly provided with a clamping plate 563. A push plate 564 located on the right side of the clamping plate 563 is jointly rotatably sleeved on the two push rods 560. The two push rods 560 are connected by a sprocket chain. A scroll spring 565 is jointly fixedly arranged between the push rod 560 and the push plate 564. The right end face of the upper push rod 560 is fixedly provided with a rotating rod 566. Among them, the push rod 560 can move left and right and rotate on the moving frame 2.

[0051] After the clamping and fixing of the ferrule and the installation of the abutting block 53 are completed, manually move the push plate 564 so that the push rod 560 drives the two transverse moving blocks 50 to move to the right. In the initial state, the spring telescopic rod 562 is in a compressed state. Therefore, the elastic force generated by the compression of the spring telescopic rod 562 causes the clamping plate 563 to always abut against the two push rods 560. As the transverse moving block 50 continues to move, the clamping plate 563 moves to be opposite to the first card slot 561 on the right side of the push rod 560. Under the action of the elastic force of the spring telescopic rod 562, the clamping plate 563 is inserted into the card slot 561 to lock the push rod 560. At the same time, the first measurement process of the inner diameter of the ferrule is completed at this time. Then, manually rotate the rotating rod 566 to drive the upper push rod 560 to rotate synchronously. Through the sprocket chain drive, the two push rods 560 rotate synchronously together. The inner wall of the first card slot 561 on the right side presses against the clamping plate 563, causing the clamping plate 563 to move backward. The clamping plate 563 finally clings to the circumferential surface of the push rod 560, and the scroll spring 565 deforms. Continue to move the push plate 564 so that the second card slot 561 on the right side gradually moves to the right to be opposite to the clamping plate 563. When they are opposite, under the torsional force of the scroll spring 565, the push rod 560 rotates back. Under the action of the elastic force of the spring telescopic rod 562, the clamping plate 563 is inserted into the card slot 561 to lock the push rod 560. Then repeat the above process to complete the second measurement of the inner diameter of the ferrule. Then repeat the above operation process. The clamping plate 563 cooperates with multiple card slots 561 on the push rod 560 from right to left in sequence to complete multiple measurements of the inner diameter of the ferrule. By performing multiple measurements, the contingency of the measurement results is reduced, and the accuracy of the measurement results is improved. After changing the position of the ferrule, repeat the above measurement process to obtain another set of data. By obtaining multiple sets of data through measurement at different measurement positions, the accuracy of the measurement results is further improved.

[0052] As Figures 1 - 8 shown, in addition, the present invention also provides a method for measuring the inner diameter of a bearing ferrule, including the following steps: S1. Place the ferrule: Clean the bearing ferrule to ensure that the inner wall surface of the ferrule is clean without oil stains, dust or other impurities. Then, manually use external equipment to place the ferrule on the right side of the vertical section of the base 1, and make all the clamping plates 401 be located outside the ferrule.

[0053] S2. Lock the ferrule: The external hydraulic cylinder works to drive the moving frame 2 and the rectangular plate 3 to move to the left, squeeze the sliding column 41, and the sliding column 41 drives the central block 410 to move to the left synchronously. The central block 410 pulls the corresponding sliding block 400 to move through the hinge bar 411. All the clamping plates 401 cooperate with each other to externally clamp and fix the ferrule, so that the axis of the ferrule is collinear with the axis of the rotating plate 40.

[0054] S3. Single-group measurement: Move the push rod 560 to the right. The push rod 560 drives the fixed block 503 to move synchronously through the cross-slide block 50. When moving to a certain measurement point, the laser emitter in the laser distance measuring device 505 emits laser, which is received by the laser receiver. Finally, the distance between the two points is obtained. The required inner diameter value at this measurement point is obtained by adding this distance to twice the distance from the fixed block 503 to the corresponding ball 504. By means of the equidistant group 56 and in cooperation with the continuous rightward movement of the push rod 560, the above measurement process is repeated at multiple measurement points in the horizontal direction to obtain a single set of data.

[0055] S4. Multi-group measurement: By rotating the rotating plate 40, the rotating plate 40 drives the clamped and fixed ring to rotate by a specified angle, and the outer ring rod 52 is engaged with the locking holes 520 at different positions, so as to realize multi-point measurement of the inner diameter at different positions on the inner wall of the ring and obtain multiple sets of data.

[0056] S5. Process data: By taking the average value of the data obtained in steps S4 and S3, the required inner diameter value is obtained, and it is compared with the range value of the specified inner diameter value to determine whether the inner diameter of the ring meets the usage requirements.

[0057] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by orientation words such as "front, back, up, down, left, right", "horizontal, vertical, perpendicular, horizontal" and "top, bottom" is usually based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present invention and simplifying the description. Without contrary instructions, these orientation words do not indicate and imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, so it cannot be understood as a limitation on the protection scope of the present invention; the orientation words "inside, outside" refer to the inside and outside relative to the contour of each component itself.

[0058] In addition, the terms "first", "second", "No. 1", "No. 2" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first", "second", "No. 1", "No. 2" may explicitly or implicitly include at least one of such features. In the description of the present invention, the meaning of "a plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0059] In the description of the present invention, it should also be noted that unless otherwise clearly defined and limited, the terms "arranged", "connected", "installed", and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

[0060] The embodiments of the specific implementation manners are all preferred embodiments of the present invention, and do not limit the protection scope of the present invention accordingly. Therefore, all equivalent changes made according to the structure, shape, and principle of the present invention should be covered within the protection scope of the present invention.

Claims

1. A bearing ring inner diameter measuring instrument, characterized in that, Including: An L-shaped base, on the upper end surface of the horizontal section of the base, a moving frame is slidably arranged left and right. A rectangular plate is fixedly arranged on the left end surface of the moving frame, and a measuring mechanism is arranged between the rectangular plate and the moving frame; A clamping unit is arranged on the vertical section of the base. The clamping unit includes a rotating plate. The rotating plate is rotatably installed on the vertical section of the base and penetrates left and right. The axis of the rotating plate is collinear with the center line of the rectangular plate. A plurality of sliding blocks evenly distributed circumferentially are slidably arranged on the rotating plate. An arc-shaped clamping plate is fixedly arranged on the right end surface of the sliding block, and the inner arc surfaces of all the clamping plates face the center line of the rectangular plate; The measuring mechanism includes a transverse movement block. The transverse movement blocks are slidably arranged left and right on the upper and lower end surfaces of the rectangular plate. Fixed columns with axes extending from front to back are fixedly arranged on the front and rear end surfaces of the two transverse movement blocks. L-shaped plates are slidably sleeved on the fixed columns from front to back. A first spring sleeved on the fixed column is fixedly arranged between the L-shaped plate and the transverse movement block. A fixed block is fixedly arranged between the two L-shaped plates facing each other up and down. Ball bearings for tightly pressing against the inner wall of the ferrule are movably arranged on the opposite surfaces of the two fixed blocks. A laser ranging device is arranged on the opposite surfaces of the two fixed blocks. An avoidance groove that penetrates front and back and is used to avoid ranging laser is opened on the rectangular plate; The clamping unit further includes a sliding column. A sliding column with an axis extending left and right is slidably installed through the center of the rotating plate left and right; The measuring mechanism further includes a docking plate. A docking plate with an axis collinear with the axis of the rotating plate is rotatably arranged on the right end surface of the rotating plate. The sliding column slidably penetrates the docking plate. Two docking columns with axes extending from left to right and distributed up and down are fixedly arranged on the right end surface of the docking plate. Docking grooves corresponding to the docking columns one by one are opened on the left end surface of the rectangular plate.

2. The inner diameter measuring instrument for a bearing ring according to claim 1, characterized in that: A center block is fixedly arranged on the left end surface of the sliding column. Articulation bars are jointly hinged between the center block and all the sliding blocks. A second spring sleeved on the sliding column is fixedly arranged between the left end surface of the vertical section of the base and the center block.

3. The inner diameter measuring instrument for a bearing ring according to claim 1, wherein: The clamping unit further includes a reference block. The inner arc surfaces of a plurality of the clamping plates are all fixedly provided with reference blocks, and all the reference blocks are circumferentially distributed about the axis of the rotating plate. The reference block is Z-shaped, and the vertical section on the right side of the reference block is closely attached to the ferrule.

4. The internal diameter measuring instrument for a bearing raceway according to claim 2, wherein: The measuring mechanism further includes an outer ring rod. Two outer ring rods that are symmetric up and down and have axes extending left and right are slidably installed through the moving frame left and right. The outer ring rods are located on the side of the clamping plate away from the center of the rotating plate. A plurality of locking holes corresponding to the clamping plates one by one are opened through the rotating plate left and right, and the outer ring rods penetrate through the corresponding locking holes.

5. The inner diameter measuring instrument for a bearing raceway according to claim 4, wherein: A pressing block located on the left side of the moving frame is fixedly sleeved on the outer ring rod through a connecting strip. The two pressing blocks are symmetric up and down. The pressing block is Z-shaped, and the vertical section on the left side of the pressing block is closely attached to the right end surface of the ferrule.

6. The inner diameter measuring instrument for a bearing raceway according to claim 5, characterized in that: On the opposite sides of the two transverse moving blocks, vertical side plates are fixedly arranged. Horizontally extending columns with a left-right axis are installed on the side plates in a left-right sliding manner and penetrate through the side plates. A through groove is formed in the vertical section on the right side of the pressing block. The horizontal column penetrates through the corresponding through groove, and the right end portion of the horizontal column is a threaded section. A nut located on the right side of the pressing block is threadedly installed on the threaded section of the horizontal column. A fitting groove is formed in the vertical section on the left side of the reference block. The fitting groove includes a first rectangular section, an arc section with the same diameter as the horizontal column, and a second rectangular section in sequence from front to back. A fitting block is fixedly arranged on the left end face of the horizontal column.

7. The internal diameter measuring instrument for a bearing raceway according to claim 1, characterized in that: A locking group is jointly arranged between the rotating plate and the vertical section of the base. The locking group includes a groove. A plurality of hemispherical grooves distributed circumferentially are formed in the left end face of the rotating plate. A fixing frame is fixedly arranged on the left end face of the vertical section of the base. A pressing column is installed on the fixing frame in a left-right sliding manner and penetrates through the fixing frame. A clamping ball is fixedly arranged on the right end face of the pressing column. A third spring sleeved on the pressing column is jointly fixedly arranged between the clamping ball and the fixing frame.

8. The inner diameter measuring instrument for a bearing ring according to claim 4, characterized in that: An equidistant group is jointly arranged on the two transverse moving blocks and the moving frame. The equidistant group includes a push rod. A push rod with a left-right axis is rotatably arranged on the right end face of the transverse moving block and movably penetrates through the moving frame. A plurality of card slots are arranged on the push rod at equal intervals along its length direction. A spring telescopic rod with a front-back axis is fixedly arranged on the right end face of the moving frame through a mounting plate. A clamping plate is fixedly arranged at the telescopic end of the spring telescopic rod. A push plate located on the right side of the clamping plate is jointly rotatably sleeved on the two push rods. The two push rods are connected by a sprocket chain. A scroll spring is jointly fixedly arranged between the push rod and the push plate. A rotating rod is fixedly arranged on the right end face of the upper push rod.

9. A method for measuring the inner diameter of a bearing ring, which is completed in cooperation with a bearing ring inner diameter measuring instrument described in claim 8, characterized in that, Including the following steps: S1. Placing the ring: Clean the bearing ring to ensure that the inner wall surface of the ring is clean without oil, dust, and impurities. Then place the ring on the right side of the vertical section of the base, and make sure that all clamping plates are located outside the ring. S2. Locking the ring: The moving frame and the rectangular plate move leftward, squeezing the sliding column. The sliding column drives the central block to move leftward synchronously. The central block drives the corresponding sliding block to move through the hinge strip. All the clamping plates cooperate with each other to externally clamp and fix the ring, so that the axis of the ring is collinear with the axis of the rotating plate. S3. Single-group measurement: Move the push rod to the right. The push rod drives the fixed block to move synchronously through the transverse moving block. When moving to the measurement point, the laser ranging device works, and finally the distance between the two points is obtained. The required inner diameter value at this measurement point is obtained by adding twice the distance from the fixed block to the corresponding ball. By means of the equidistant group and in cooperation with the continuous rightward movement of the push rod, the above measurement process is repeated at multiple measurement points in the horizontal direction to obtain a single group of data. S4. Multi-group measurement: Rotate the rotating plate so that the rotating plate drives the clamped and fixed ring to rotate by a specified angle, and make the outer ring rod cooperate with the locking holes at different positions, so as to realize multi-point measurement of the inner diameter at different positions of the inner wall of the ring and obtain multiple groups of data. S5. Process data: By taking the average of the data obtained in steps S4 and S3, the required inner diameter value is obtained and compared with the range value of the specified inner diameter value to determine whether the inner diameter of this ring meets the usage requirements.

Images