A coaxiality testing device for the outer ring raceway of large bearings

Abstract

A coaxiality testing device for the raceway of a large bearing outer ring, belonging to the technical field of bearing testing equipment, includes a support mechanism, a transmission mechanism, and a testing mechanism. The support mechanism supports the bearing outer ring, the transmission mechanism drives the bearing outer ring on the support mechanism to rotate, and the testing mechanism detects the coaxiality of the raceway of the rotating bearing outer ring. The advantages of this invention are: by using a pneumatic gauge and a testing head to detect the coaxiality of the raceway of a large bearing outer ring, the device has a simple structure and is easy to use, effectively solving the problems of large bearing outer rings being too heavy to hold and the frequent replacement of traditional testing heads due to wear.

Description

Technical Field

[0001] This utility model belongs to the technical field of bearing testing equipment, specifically relating to a coaxiality testing device for the outer ring raceway of a large bearing. Background Technology

[0002] The coaxiality of the bearing outer ring raceway is an important standard for measuring whether a bearing meets the standards. The conventional testing method is to place the test head against the raceway of the bearing outer ring, rotate the bearing outer ring by turning the handle, causing the raceway surface to rub against the test head, and then judge the result by the instrument reading. However, the outer ring of large bearings is heavy and the existing device cannot hold it. In addition, the continuous friction between the test head and the outer ring raceway can damage the test head, and the measured value is not sufficient for reference. It is necessary to frequently replace the test head, which increases the cost of testing and the workload of the testing personnel. Utility Model Content

[0003] To address the shortcomings of existing technologies, the purpose of this invention is to design a device for detecting the coaxiality of the raceway of the outer ring of large bearings. This device aims to solve the problems mentioned in the background art, such as the large weight of the outer ring of the large bearing making it impossible to clamp, and the high detection cost and large workload due to the need for frequent replacement of the worn detection head.

[0004] To achieve the above objectives, the present invention adopts the following technical solution: a coaxiality detection device for the raceway of the outer ring of a large bearing, comprising a support mechanism, a transmission mechanism, and a detection mechanism. The support mechanism is used to support the outer ring of the bearing, the transmission mechanism drives the outer ring of the bearing on the support mechanism to rotate, and the detection mechanism detects the coaxiality of the raceway of the rotating outer ring of the bearing.

[0005] The support mechanism includes a base, a bearing seat, and a support roller. There are two sets of bases arranged side by side. Each set of bases consists of oppositely arranged "U"-shaped plates. Each base is equipped with a bearing seat. There are two support rollers. The shafts at both ends of each support roller pass through the bearing seats on the same set of bases. The shaft ends of the support rollers after passing through the bearing seats are connected to the transmission mechanism.

[0006] The transmission mechanism includes a motor base, a servo motor, and a transmission belt. The servo motor is mounted on the motor base, and the transmission belt is provided on the main shaft of the servo motor. The transmission belt cooperates with the shaft end of the support roller to drive the support roller to rotate.

[0007] The detection mechanism is located on one side of the support mechanism. The detection mechanism includes a base plate, a column, a retaining ring, a locking bolt A, a measuring arm, a locking bolt B, and a detection head. The base plate has a column at its center, and the column has external threads. A retaining ring is fitted on the column, and an adjusting ring is located at the bottom of the retaining ring. The position of the retaining ring on the column is adjusted by the adjusting ring. A locking bolt A is located on one side of the outer wall of the retaining ring, and the position of the retaining ring on the column is fixed by the locking bolt A. A measuring arm is fixed on the other side of the outer wall of the retaining ring. A through narrow groove is located at the center line of the end of the measuring arm. A round hole is located in the middle of the narrow groove. A threaded through hole is located on the side wall of the narrow groove near the end. A locking bolt B is located in the threaded through hole. The detection head is a rod-shaped structure. The rod passes vertically through the round hole in the middle of the narrow groove and is fastened by the locking bolt B and the threaded through hole on the side wall of the narrow groove.

[0008] The detection head is a pneumatic detection head with a sensor. It has a nozzle at its end, and the nozzle forms a small gap with the outer raceway of the bearing. The detection head is also equipped with a pneumatic gauge that works with it. The pneumatic gauge introduces stable compressed air into the detection head and indirectly measures the outer raceway of the bearing by detecting changes in the back pressure of the nozzle. The pneumatic gauge converts the air pressure signal into a size signal and displays it on the screen.

[0009] The beneficial effects of this utility model are: by combining a pneumatic gauge and a testing head, the coaxiality of the raceway of the outer ring of a large bearing is tested. The device has a simple structure and is easy to use, effectively solving the problems of the large bearing outer ring being too heavy to be clamped and the need for frequent replacement of traditional testing heads due to wear. Attached Figure Description

[0010] Figure 1 This is a schematic diagram of the overall structure of this utility model.

[0011] Figure 2 for Figure 1 A magnified view of part A.

[0012] In the diagram: 1. Base, 2. Bearing seat, 3. Support roller, 4. Motor seat, 5. Servo motor, 6. Transmission belt, 7. Base plate, 8. Column, 9. Snap ring, 10. Adjusting ring, 11. Locking bolt A, 12. Measuring arm, 1201. Narrow groove, 1202. Round hole, 1203. Locking bolt B, 13. Detection head, 1301. Nozzle, 14. Pneumatic measuring instrument. Detailed Implementation

[0013] The technical solution of this utility model will be clearly and completely described below with reference to the accompanying drawings. It should be noted that the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0014] Please see Figure 1 , Figure 2A coaxiality detection device for the raceway of a large bearing outer ring includes a support mechanism, a transmission mechanism, and a detection mechanism. The support mechanism supports the bearing outer ring, the transmission mechanism drives the bearing outer ring on the support mechanism to rotate, and the detection mechanism detects the coaxiality of the raceway of the rotating bearing outer ring. The support mechanism includes a base 1, a bearing seat 2, and support rollers 3. There are two sets of base 1, arranged side by side. Each set of base 1 consists of a U-shaped plate facing each other. Each base 1 has a bearing seat 2. There are two support rollers 3, with the shafts at both ends of each support roller 3 passing through the bearing seat 2 on the same set of base 1. The shaft ends of the support roller 3 after passing through the bearing seat 2 are connected to the transmission mechanism. The transmission mechanism includes a motor base 4, a servo motor 5, and a transmission belt 6. The servo motor 5 is mounted on the motor base 4, and the transmission belt 6 is provided on the main shaft of the servo motor 5. The transmission belt 6 cooperates with the shaft ends of the support rollers 3 to drive the support rollers 3 to rotate. The detection mechanism is located on one side of the support mechanism. The detection mechanism includes a base plate 7, a column 8, a retaining ring 9, a locking bolt A11, a measuring arm 12, a locking bolt B1203, and a detection head 13. The base plate 7 has a column 8 at its center. The column 8 has external threads on its shaft. A retaining ring 9 is fitted onto the column 8. An adjusting ring 10 is located at the bottom of the retaining ring 9, allowing adjustment of its position on the column 8. A locking bolt A11 is located on one side of the outer wall of the retaining ring 9, securing the retaining ring 9 to the column 8. At the position above, a measuring arm 12 is fixedly provided on the other side of the outer wall of the retaining ring 9. A through narrow groove 1201 is provided at the center line of the end of the measuring arm 12. A round hole 1202 is provided in the middle of the narrow groove 1201. A threaded through hole is provided on the side wall of the narrow groove 1201 near the end. A locking bolt B1203 is provided in the threaded through hole. The detection head 13 is a rod-shaped structure. The rod body passes vertically through the round hole 1202 in the middle of the narrow groove 1201 and is fastened by the locking bolt B1203 and the threaded through hole on the side wall of the narrow groove 1201. The detection head 13 is a pneumatic detection head with a sensor. It has a nozzle 1301 at its end, and the nozzle 1301 forms a small gap with the outer raceway of the bearing. The detection head 13 is also equipped with a pneumatic gauge 14 that works with it. The pneumatic gauge 14 introduces stable compressed air into the detection head 13 and indirectly measures the outer raceway of the bearing by detecting the change in back pressure of the nozzle 1301. The pneumatic gauge 14 converts the air pressure signal into a size signal and displays it on the screen.

[0015] When using this utility model: First, the bearing outer ring is hoisted to the space between the two support rollers 3 of the support mechanism using a hoisting device, so that the arc surface of the bearing outer ring contacts and engages with the arc surface of the two support rollers 3. Next, the servo motor 5 is turned on, and the main shaft of the servo motor 5 drives the transmission belt 6 to work. The transmission belt 6 drives the shaft ends of the two support rollers 3 to start rotating synchronously under the action of the bearing seat 2. The rotation of the support rollers 3 causes the bearing outer ring to start rotating in the opposite direction. At this time, the retaining ring 9 is adjusted to a suitable position by using the external thread on the column 8 to engage with the internal thread of the adjusting ring 10, and then it is tightened by the locking bolt A11. At this time, the nozzle 1301 at the end of the detection head 13 held on the measuring arm 12 is close to the raceway of the bearing outer ring. The pneumatic gauge 14 is turned on to spray uniform and continuous compressed air from the nozzle 1301 of the detection head 13. The back pressure information obtained by the sensor on the detection head 13 is transmitted back to the pneumatic gauge 14. The pneumatic gauge 14 converts the air pressure signal into a size signal and displays it on the screen. Based on the information, a judgment is made, and then the coaxiality detection of the bearing outer ring raceway is completed.

[0016] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

[0017] The parts of this utility model not described in detail are existing technologies.

Claims

1. A coaxiality detection device for large bearing outer ring raceway, comprising a supporting mechanism, a transmission mechanism and a detection mechanism, characterized in that: The described support mechanism is used to support the outer ring of the bearing. The drive mechanism drives the outer ring of the bearing on the support mechanism to rotate, and then the coaxiality of the rotating raceway of the outer ring of the bearing is detected by the detection mechanism.

2. A coaxiality detection device for a large bearing outer ring raceway according to claim 1, characterized in that: The described support mechanism includes a base (1), a bearing seat (2), and a supporting roller (3). There are two groups of the bases (1), and the two groups of bases (1) are arranged in parallel. Each group of bases (1) is a "U"-shaped plate arranged oppositely. A bearing seat (2) is provided on each base (1). There are two supporting rollers (3). The shafts at both ends of each supporting roller (3) respectively pass through the bearing seats (2) on the same group of bases (1), and the shaft ends of the supporting rollers (3) after passing through the bearing seats (2) are connected to the drive mechanism.

3. A coaxiality detection device for a large bearing outer ring raceway according to claim 2, characterized in that: The described drive mechanism includes a motor base (4), a servo motor (5), and a transmission belt (6). The servo motor (5) is installed on the motor base (4). A transmission belt (6) is provided on the main shaft of the servo motor (5). The transmission belt (6) cooperates with the shaft end of the supporting roller (3) to drive the supporting roller (3) to rotate.

4. The coaxiality detection device for the raceway of the outer ring of a large bearing according to claim 1, characterized in that: The described detection mechanism is arranged on one side of the support mechanism. The detection mechanism includes a bottom plate (7), a column (8), a clamping ring (9), a locking bolt A (11), a measuring arm (12), a locking bolt B (1203), and a detection head (13). A column (8) is provided at the center of the bottom plate (7). The column body of the column (8) has an external thread. A clamping ring (9) is sleeved on the column (8). An adjusting ring (10) is provided at the bottom of the clamping ring (9). The position of the clamping ring (9) on the column (8) is adjusted through the adjusting ring (10). A locking bolt A (11) is provided on one side of the outer wall of the clamping ring (9) to fix the position of the clamping ring (9) on the column (8) through the locking bolt A (11). A measuring arm (12) is fixedly provided on the other side of the outer wall of the clamping ring (9). A through narrow groove (1201) is provided at the center line of the end of the measuring arm (12). A round hole (1202) is provided in the middle of the narrow groove (1201). A threaded through hole is provided on the side wall of the narrow groove (1201) near the end. A locking bolt B (1203) is provided in the threaded through hole. The detection head (13) is of a rod-shaped structure. The rod body vertically passes through the round hole (1202) in the middle of the narrow groove (1201), and the rod body is fastened through the cooperation of the locking bolt B (1203) and the threaded through hole on the side wall of the narrow groove (1201).

5. A coaxiality measuring device for a large bearing outer ring raceway according to claim 4, characterized in that: The described detection head (13) is a pneumatic detection head (13) with a sensor, and a nozzle (1301) is provided at its end. The nozzle (1301) forms a small gap with the raceway of the outer ring of the bearing; the detection head (13) is also provided with a pneumatic gauge (14) that cooperates with it. The pneumatic gauge (14) passes stable compressed air into the detection head (13), and indirectly measures the raceway of the outer ring of the bearing by detecting the change of the back pressure of the nozzle (1301). The pneumatic gauge (14) converts the air pressure signal into a dimension signal and displays it on the screen.

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