A bearing shaft pole coaxial degree detection and calibration device
The automated detection and calibration of bearing shafts is achieved through a synchronous calibration mechanism and transmission structure, which solves the problems of low efficiency and large error in the existing technology, improves the detection accuracy and protects the integrity of the bearing outer ring.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- NINGBO XIDONG INTELLIGENT TECHNOLOGY CO LTD
- Filing Date
- 2025-06-25
- Publication Date
- 2026-05-29
AI Technical Summary
Existing bearing shaft coaxiality detection and calibration devices are inefficient, cannot achieve automated linkage, have large errors due to manual intervention, and are prone to deformation of the bearing outer ring.
A synchronous calibration mechanism, including a two-way lead screw, cam, and clamping block, is adopted to achieve synchronous clamping and coaxiality pre-calibration of the shaft and bearing through mechanical linkage. Combined with the transmission structure of worm gear, worm, gear and rack, 360° continuous scanning detection is performed, and real-time calibration and adjustment are performed using a motor and pressure sensor.
It improves the accuracy and efficiency of testing, avoids human error, achieves adaptive clamping of the bearing outer ring, protects the bearing surface from damage, and ensures automated linkage between testing and calibration.
Smart Images
Figure CN224295686U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the field of bearing shaft coaxiality detection technology, specifically, it relates to a bearing shaft coaxiality detection and calibration device. Background Technology
[0002] The bearing shaft coaxiality detection and calibration device is a precision measuring tool used to detect the coaxiality error of rotating components (such as bearings and shafts) and to ensure that their axis height is consistent through calibration and adjustment. Its core objective is to avoid friction, vibration or performance degradation caused by axis misalignment and to ensure the stable operation of mechanical systems.
[0003] The prior art discloses a coaxiality calibration device (CN219829739U). One end of the connecting shaft is placed in a triangular opening. The screw is rotated to press down the pressure block and fix the left side of the connecting shaft. Then, the second lead screw is rotated to move the probe down to contact the right side of the connecting shaft. The right side of the connecting shaft is rotated, and the coaxiality is judged by the reading of the dial indicator and calibrated. Then, the first lead screw is rotated to stably adjust the position of the probe, thereby calibrating different positions of the connecting shaft. The overall structure is simple, easy to operate, and highly practical. It includes a base and feet, with the feet fixedly set at the bottom of the base. It also includes a fixing mechanism, a moving mechanism, and a calibration mechanism. The fixing mechanism is set at the top of the base, the moving mechanism is set at the top of the base, and the calibration mechanism is set on the moving mechanism.
[0004] The search revealed that the probe position needs to be manually adjusted, which is inefficient and cannot perform circumferential testing based on the shaft surface. Furthermore, the existing technology lacks a fixed mechanism to coordinate calibration and testing, which can easily lead to deformation of the bearing outer ring. In summary, the existing technology not only relies heavily on manual judgment in the calibration process but also cannot achieve automated linkage between testing and calibration, which can easily affect the accuracy of testing.
[0005] In view of this, this utility model is hereby proposed. Utility Model Content
[0006] To solve the above-mentioned technical problems, the basic concept of the technical solution adopted by this utility model is as follows:
[0007] A bearing shaft coaxiality detection and calibration device, comprising:
[0008] The base has a shaft mounting seat, a bearing mounting seat and a fixed seat that are detachably installed on it. A surrounding detection structure is rotatably installed on the fixed seat. The shaft mounting seat and the bearing mounting seat have the same structural shape. The shaft mounting seat and the bearing mounting seat are respectively provided with a synchronous calibration mechanism for fixing the detection piece and calibrating the coaxial line.
[0009] The synchronous calibration mechanism includes a bidirectional lead screw, a cam, and clamping blocks. Three clamping blocks are elastically provided in the shaft mounting seat and the bearing mounting seat respectively. A cam is rotatably provided in the shaft mounting seat and the bearing mounting seat respectively. The bidirectional lead screw is rotatably disposed in the base. The shaft mounting seat and the bearing mounting seat are threaded at both ends of the bidirectional lead screw.
[0010] In a preferred embodiment of this utility model, the surrounding detection structure includes a worm gear, a gear, a rack, and a worm. The gear is fixedly mounted on one end of the worm, the rack is snapped onto the base, the worm gear is driven on the worm, and both the worm gear and the worm are rotatably mounted in the fixed seat.
[0011] In a preferred embodiment of this utility model, a motor is fixedly mounted on one side of the shaft mounting seat and the bearing mounting seat respectively. The output end of the motor is connected to one side of the cam. Both the shaft mounting seat and the bearing mounting seat have a receiving cavity, and the cam is rotatably mounted in the receiving cavity.
[0012] In a preferred embodiment of this utility model, two symmetrical sliding grooves are provided on the top surface of the base. The shapes of the shaft mounting seat and the bearing mounting seat correspond to the two sliding grooves. The shaft mounting seat is slidably fitted in the sliding groove. A handwheel is rotatably provided on one side of the base, and the handwheel is fixedly connected to one end of the bidirectional lead screw.
[0013] In a preferred embodiment of this utility model, the shaft mounting base and the bearing mounting base are both provided with three shrinkage grooves arranged in a ring array inside. The shrinkage grooves are fitted with sliding clamping blocks. A swing groove for swinging the clamping blocks is provided between the three shrinkage grooves and the receiving cavity. A shrinkage spring is fixed between the clamping blocks and the shrinkage grooves. The clamping blocks are elastically connected to the shrinkage grooves through the shrinkage springs.
[0014] In a preferred embodiment of this utility model, the top surface of the base is provided with a slot, a rack is engaged in the slot, the fixing seat is an arched structure, the gear transmission is arranged above the rack, and the gear and rack are meshed.
[0015] In a preferred embodiment of this utility model, the worm gear is rotatably mounted at the center of the fixed base, and a coaxiality measuring instrument is fixedly mounted on one side of the worm gear. The coaxiality measuring instrument rotates and slides against the outer wall of one side of the fixed base, and the worm gear drives the worm.
[0016] Compared with the prior art, the present invention has the following advantages:
[0017] 1. When the distance between the shaft mounting base and the bearing mounting base is adjusted, the workpiece clamping and coaxiality pre-calibration are completed synchronously through the mechanical linkage of the two-way lead screw and cam, avoiding errors caused by manual intervention. The coaxiality measuring instrument is driven to continuously scan around the outer circumference of the shaft or bearing using the transmission structure of worm gear, worm, gear and rack, so as to achieve 360° detection without dead angles and improve the accuracy of detection.
[0018] 2. The distance between the shaft mounting base and the bearing mounting base is adjusted by a two-way screw, and the clamping is elastically clamped by the V-shaped opening of the clamping block. During calibration, the clamping angle can be finely adjusted by the swing groove. With the buffering effect of the contraction spring, it can adapt to the size of the test piece and achieve adaptive clamping, thereby avoiding hard contact damage to the bearing outer ring or shaft surface.
[0019] The specific embodiments of this utility model will be described in further detail below with reference to the accompanying drawings. Attached Figure Description
[0020] In the attached diagram:
[0021] Figure 1 This is a schematic diagram of the overall structure of this utility model;
[0022] Figure 2 This is a schematic diagram of the base of this utility model;
[0023] Figure 3 This is a cross-sectional schematic diagram of the fixing base of this utility model;
[0024] Figure 4 This is a cross-sectional schematic diagram of the shaft mounting base of this utility model;
[0025] Figure 5 This is a schematic diagram of the surround detection structure of this utility model.
[0026] In the diagram: 10. Base; 11. Shaft mounting seat; 12. Bearing mounting seat; 13. Fixed seat; 14. Coaxiality measuring instrument; 15. Handwheel; 16. Slide groove; 17. Slot; 18. Double-acting lead screw; 19. Motor; 20. Cam; 21. Shrinkage groove; 22. Swing groove; 23. Clamping block; 24. Shrinkage spring; 25. Worm gear; 26. Gear; 27. Rack; 28. Worm; 29. Storage cavity. Detailed Implementation
[0027] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions in the embodiments will be clearly and completely described below with reference to the accompanying drawings. The following embodiments are used to illustrate this utility model.
[0028] A bearing shaft coaxiality detection and calibration device, such as Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5 As shown, the device includes a base 10, on which a shaft mounting seat 11, a bearing mounting seat 12, and a fixing seat 13 are detachably mounted. A surround detection structure is rotatably mounted on the fixing seat 13. The shaft mounting seat 11 and the bearing mounting seat 12 have the same structural shape. The shaft mounting seat 11 and the bearing mounting seat 12 are respectively provided with a synchronous calibration mechanism for fixing the test piece and calibrating the coaxial line simultaneously. The shaft mounting seat 11 and the bearing mounting seat 12 have the same structural shape, both composed of square blocks and arched blocks. A circular hole is opened in the center of the arched block for fixing the shaft and the outer ring of the bearing, respectively. The fixing seat 13 has an arched structure and a surround detection structure is rotatably mounted on it for performing all-round coaxiality testing of the bearing shaft.
[0029] The synchronous calibration mechanism includes a bidirectional lead screw 18, a cam 20, and a clamping block 23. Three clamping blocks 23 are elastically provided in the shaft mounting seat 11 and the bearing mounting seat 12 respectively. A cam 20 is rotatably provided in the shaft mounting seat 11 and the bearing mounting seat 12 respectively. The bidirectional lead screw 18 is rotatably provided in the base 10. The shaft mounting seat 11 and the bearing mounting seat 12 are threaded at both ends of the bidirectional lead screw 18 respectively.
[0030] like Figure 1 , Figure 4 and Figure 5 As shown, the surrounding detection structure includes a worm gear 25, a gear 26, a rack 27, and a worm 28. The gear 26 is fixedly mounted on one end of the worm 28, the rack 27 is snapped onto the base 10, and the worm gear 25 is driven on the worm 28. Both the worm gear 25 and the worm 28 are rotatably mounted in the fixed seat 13.
[0031] like Figure 2 , Figure 4 and Figure 5 As shown, the top surface of the base 10 has a slot 17, in which a rack 27 is engaged. The fixed base 13 has an arched structure, and the gear 26 is driven above the rack 27. The gear 26 and the rack 27 mesh.
[0032] like Figure 4 and Figure 5 As shown, the fixed base 13 has an annular opening at its center, and the worm gear 25 is rotatably mounted at the center of the fixed base 13. A coaxiality measuring instrument 14 is fixedly mounted on one side of the worm gear 25. The coaxiality measuring instrument 14 rotates and slides against the outer wall of one side of the fixed base 13, and the worm gear 25 drives the worm 28 to mesh.
[0033] Specifically, during use, the fixed seat 13 is manually pushed to move axially along the base 10, the gear 26 rolls along the rack 27 and drives the worm 28 to rotate, the worm 28 drives the worm wheel 25 and the coaxiality measuring instrument 14 to rotate synchronously 360° to detect the coaxiality of the outer and inner rings of the bearing or shaft fixed on the shaft mounting seat 11 and the bearing mounting seat 12. The coaxiality measuring instrument 14 records the maximum radial runout value and determines whether it exceeds the error threshold. By reading the radial runout data in real time, continuous detection of the full circumference coaxiality of the test piece can be achieved.
[0034] like Figure 1 and Figure 3 As shown, a motor 19 is fixed on one side of the shaft mounting base 11 and the bearing mounting base 12 respectively. The output end of the motor 19 is connected to one side of the cam 20. Both the shaft mounting base 11 and the bearing mounting base 12 have a receiving cavity 29. The cam 20 is rotatably disposed in the receiving cavity 29. Both the shaft mounting base 11 and the bearing mounting base 12 are composed of a square block and an arched block. The center of the arched block has a circular hole for the bearing shaft to pass through.
[0035] like Figure 1 , Figure 2 and Figure 3 As shown, two symmetrical grooves 16 are formed on the top surface of the base 10. The shapes of the shaft mounting seat 11 and the bearing mounting seat 12 correspond to the two grooves 16. Two sliders are symmetrically fixed on the bottom surfaces of the shaft mounting seat 11 and the bearing mounting seat 12. The two sliders slide in the grooves 16. The shaft mounting seat 11 is slidably fitted in the grooves 16. A handwheel 15 is rotatably provided on one side of the base 10. The handwheel 15 is fixedly connected to one end of the bidirectional lead screw 18. A square block is fixed at the center of the bottom surface of the shaft mounting seat 11 and the bearing mounting seat 12. A threaded hole is formed in the square block. The bidirectional lead screw 18 is threadedly fitted into the threaded hole.
[0036] like Figure 3 As shown, the shaft mounting base 11 and the bearing mounting base 12 both have three shrinkage grooves 21 arranged in a ring array inside. The shrinkage grooves 21 are fitted with sliding clamping blocks 23. The three shrinkage grooves 21 and the receiving cavity 29 are respectively provided with a swing groove 22 for the clamping blocks 23 to swing. A shrinkage spring 24 is fixed between the clamping blocks 23 and the shrinkage grooves 21. The clamping blocks 23 are elastically connected to the shrinkage grooves 21 through the shrinkage springs 24. The clamping blocks 23 are T-shaped blocks in general. The shrinkage grooves 21 are opened to correspond to the shape of the clamping blocks 23. A V-shaped opening is opened on the side of the clamping blocks 23 away from the shrinkage grooves 21. The size of the clamping blocks 23 is less than or equal to the shrinkage grooves 21.
[0037] Specifically, one end of the bidirectional lead screw 18 is connected to the handwheel 15, and the other end is fixed through a bearing seat. When the handwheel 15 is rotated, the shaft mounting seat 11 and the bearing mounting seat 12 move closer or further away synchronously along the sliding groove 16 of the base 10 to achieve spacing adjustment. The clamping block 23 has a V-shaped opening at its front end and extends into the storage cavity 29 through the swing groove 22 at its rear end. Two motors 19 are respectively fixed to the sides of the shaft mounting seat 11 and the bearing mounting seat 12. The output shaft is connected to the cam 20. A pressure sensor is installed on the shaft end of the cam 20. The pressure sensor monitors the calibration pressure in real time. The coaxiality measuring instrument 14 is connected to an external control display terminal. The control display terminal receives the detection data of the coaxiality measuring instrument 14 and calculates the coaxiality in real time. If local eccentricity is detected, the control display terminal fine-tunes the motor 19 in the corresponding position, and the cam 20 fine-tunes the shaft. Alternatively, the bearing position can be adjusted by swinging the clamping block 23 to achieve elastic deformation and correct the slight bending of the shaft. In the initial state, the contraction spring 24 supports the clamping block 23 in the contraction groove 21. When calibration occurs, the motor 19 drives the cam 20 to rotate. The eccentric contour of the cam 20 pushes the detection piece to move slightly. The three clamping blocks 23 are evenly distributed along the circumference and simultaneously squeeze the corresponding contraction spring 24 and swing slightly in the corresponding swing groove 22, thereby assisting the detection piece axis to be coaxial with the corresponding circular hole axis and achieving preliminary calibration.
[0038] It is worth noting that the coaxiality measuring instrument 14 used in this device is an existing model available on the market, which can scan and inspect the inner and outer sides of bearings or shafts.
[0039] It is understood that this utility model has been described through some embodiments, and those skilled in the art will recognize that various changes or equivalent substitutions can be made to these features and embodiments without departing from the spirit and scope of this utility model. Furthermore, under the teachings of this utility model, these features and embodiments can be modified to adapt to specific situations and materials without departing from the spirit and scope of this utility model. Therefore, this utility model is not limited to the specific embodiments disclosed herein, and all embodiments falling within the scope of the claims of this application are within the protection scope of this utility model.
Claims
1. A bearing shaft coaxiality detection and calibration device, characterized in that, include A base (10) is provided with a shaft mounting seat (11), a bearing mounting seat (12) and a fixed seat (13) which are detachably mounted on the base (10). A surrounding detection structure is rotatably mounted on the fixed seat (13). The shaft mounting seat (11) and the bearing mounting seat (12) have the same structural shape. The shaft mounting seat (11) and the bearing mounting seat (12) are respectively provided with a synchronous calibration mechanism for fixing the detection piece and calibrating the coaxial line. The synchronous calibration mechanism includes a bidirectional lead screw (18), a cam (20), and a clamp (23). Three clamps (23) are elastically provided in the shaft mounting seat (11) and the bearing mounting seat (12). A cam (20) is rotatably provided in the shaft mounting seat (11) and the bearing mounting seat (12). The bidirectional lead screw (18) is rotatably provided in the base (10). The shaft mounting seat (11) and the bearing mounting seat (12) are threaded at both ends of the bidirectional lead screw (18).
2. The bearing shaft coaxiality detection and calibration device according to claim 1, characterized in that, The surrounding detection structure includes a worm gear (25), a gear (26), a rack (27) and a worm (28). The gear (26) is fixedly mounted on one end of the worm (28), the rack (27) is snapped onto the base (10), the worm gear (25) is driven on the worm (28), and both the worm gear (25) and the worm (28) are rotatably mounted in the fixed seat (13).
3. The bearing shaft coaxiality detection and calibration device according to claim 1, characterized in that, A motor (19) is fixed on one side of the shaft mounting seat (11) and the bearing mounting seat (12). The output end of the motor (19) is connected to one side of the cam (20). A storage cavity (29) is opened in both the shaft mounting seat (11) and the bearing mounting seat (12). The cam (20) is rotatably set in the storage cavity (29).
4. The bearing shaft coaxiality detection and calibration device according to claim 2, characterized in that, Two symmetrical grooves (16) are provided on the top surface of the base (10). The shapes of the shaft mounting seat (11) and the bearing mounting seat (12) correspond to the two grooves (16). The shaft mounting seat (11) is slidably fitted in the groove (16). A handwheel (15) is rotatably provided on one side of the base (10). The handwheel (15) is fixedly connected to one end of the bidirectional lead screw (18).
5. The bearing shaft coaxiality detection and calibration device according to claim 4, characterized in that, The shaft mounting base (11) and the bearing mounting base (12) are both provided with three shrinkage grooves (21) arranged in a ring array inside. The shrinkage grooves (21) are fitted with sliding clamping blocks (23). The three shrinkage grooves (21) and the receiving cavity (29) are respectively provided with a swing groove (22) for the clamping block (23) to swing. The clamping block (23) and the shrinkage groove (21) are fixedly provided with a shrinkage spring (24). The clamping block (23) is elastically connected to the shrinkage groove (21) through the shrinkage spring (24).
6. The bearing shaft coaxiality detection and calibration device according to claim 2, characterized in that, The top surface of the base (10) is provided with a slot (17), in which a rack (27) is engaged. The fixed seat (13) has an arched structure. The gear (26) is driven above the rack (27), and the gear (26) and the rack (27) mesh.
7. The bearing shaft coaxiality detection and calibration device according to claim 6, characterized in that, The worm gear (25) is rotatably mounted at the center of the fixed seat (13). A coaxiality measuring instrument (14) is fixedly mounted on one side of the worm gear (25). The coaxiality measuring instrument (14) rotates and slides against the outer wall of one side of the fixed seat (13). The worm gear (25) drives the meshing worm (28).