Bearing inner ring control device and method

Abstract

The invention belongs to the field of bearing detection, and particularly relates to a bearing inner ring control device and method. The supporting plate is fixed at the output end of the linear driving mechanism; the positioning part is arranged on the supporting plate and is inserted into one end of the bearing inner ring to be detected, and the bearing inner ring to be detected can rotate relative to the positioning part; the balls are arranged on the supporting plate, surround the positioning part and directly face the end face of one end of the to-be-detected bearing inner ring; and the rotation driving mechanism is arranged opposite to the linear driving mechanism, and the output end of the rotation driving mechanism can drive the other end of the bearing inner ring to be detected to rotate. The bearing to be measured is positioned through the positioning part, the inner ring of the bearing to be measured is driven to rotate through the rotation driving mechanism, the rollers are further driven to achieve revolution and rotation, and a single camera at a fixed point position can collect images of the whole cambered surfaces of all the rollers on the bearing to be measured. According to the invention, various friction forces of rotation of the bearing inner ring to be tested can be effectively reduced.

Description

Technical Field

[0001] This invention belongs to the field of bearing testing, and specifically relates to a bearing inner ring control device and method. Background Technology

[0002] As a core component of mechanical transmission systems, the machining accuracy of the roller arc surface of roller bearings directly affects the bearing's operational stability, service life, and transmission efficiency. Therefore, quality inspection of the roller arc surface is a crucial step in the bearing production process. In traditional bearing production and inspection processes, the common practice is to inspect each individual roller one by one, and only assemble the bearing after it has passed inspection.

[0003] However, this traditional method of testing before assembly has significant drawbacks. On the one hand, the step-by-step testing mode makes the testing process cumbersome, consumes a lot of time, and seriously restricts the overall production efficiency of bearings, making it difficult to meet the high-efficiency requirements of large-scale industrial production. On the other hand, the assembly process may cause secondary damage to the roller arc surface that has passed the test, resulting in the bearings that are finally assembled still having quality defects, affecting the reliability of the test results.

[0004] To address the aforementioned issues, the industry urgently needs a method that first completes roller assembly and then performs overall inspection of all rollers in the assembled bearing. Simultaneously, considering production cost control requirements, the inspection equipment should have a simplified structure as much as possible; therefore, an inspection scheme using a single camera for fixed-point visual image acquisition is the preferred approach.

[0005] However, the core challenge of using a single camera for fixed-point acquisition lies in ensuring that all assembled rollers can both rotate on their own axis and revolve around the bearing center, so that the entire circumference of each roller can be completely captured by a single camera at a fixed position, ensuring no blind spots in the inspection. Currently, there is no dedicated device in existing technology that can simultaneously meet the requirements of roller rotation and revolution drive and is compatible with fixed-point inspection by a single camera, making it impossible to achieve efficient and low-cost inspection of the entire circumference of the assembled bearing rollers. Summary of the Invention

[0006] The present invention provides a bearing inner ring control device and method, which can effectively solve the problems in the background art.

[0007] The present invention provides a bearing inner ring control device and method, comprising:

[0008] Linear drive mechanism;

[0009] A support plate fixed to the output end of the linear drive mechanism;

[0010] A positioning part is provided on the support plate. The positioning part is inserted into one end of the inner ring of the bearing to be tested, and the inner ring of the bearing to be tested can rotate relative to the positioning part.

[0011] Several balls are mounted on a support plate and surround the positioning part, with the balls facing one end face of the inner ring of the bearing to be inspected;

[0012] Additionally, a rotary drive mechanism is provided opposite to the linear drive mechanism, the output end of which can drive the other end of the inner ring of the bearing under test to rotate.

[0013] As a further optimization of the present invention, it also includes:

[0014] The drive unit is connected to the output end of the rotary drive mechanism. The end of the drive unit is inserted into the other end of the inner ring of the bearing to be tested. The side wall of the end of the drive unit is provided with an annular groove.

[0015] Additionally, an elastic ring fitted into the annular groove extends into the inner ring of the bearing under test and can rotate with the rotation drive mechanism, thereby driving the inner ring of the bearing under test to rotate.

[0016] As a further optimization of the present invention, the driving part includes:

[0017] The end of the disc is disc-shaped and its size is larger than the inner diameter of the bearing to be measured;

[0018] Additionally, a cylindrical end with a diameter slightly smaller than the inner ring of the bearing to be tested has an annular groove located at the cylindrical end.

[0019] As a further optimization of the present invention, a buffer plate is provided between the disk end and the output end of the rotary drive mechanism.

[0020] As a further optimization of the present invention, the linear drive mechanism is positioned above the rotary drive mechanism.

[0021] As a further optimization of the present invention, the linear drive mechanism is located below the rotary drive mechanism.

[0022] As a further optimization of the present invention, the ball bearing adopts a universal ball structure.

[0023] As a further optimization of the present invention, the linear drive mechanism adopts a cylinder; the rotary drive device adopts a geared motor.

[0024] As a further optimization of the present invention, both the positioning part and the driving part have chamfered ends.

[0025] As a further optimization of the present invention, a detection method is also included, comprising the following steps:

[0026] S1: The output end of the linear drive mechanism extends linearly, causing the output ends of the ball and the rotary drive mechanism to abut against the two ends of the inner ring of the bearing to be tested, respectively.

[0027] S2: The output end of the rotary drive mechanism drives the inner ring of the bearing under test to rotate around its axis.

[0028] S3: A camera placed near the bearing under test captures images of the roller that is both revolving around the sun and rotating on its own axis.

[0029] This invention provides a bearing inner ring control device and method. The bearing under test is positioned by a positioning part, and then the inner ring of the bearing under test is driven to rotate by a rotary drive mechanism. This, in turn, causes the rollers to revolve and rotate, allowing a single camera at a fixed point to capture images of the entire arc surface of all rollers on the bearing under test. This invention uses the ball bearings as supports for the end face of the inner ring of the bearing under test, effectively reducing various frictional forces during the rotation of the inner ring and minimizing interference. Attached Figure Description

[0030] Figure 1 This is a schematic diagram of the system structure in this embodiment;

[0031] Figure 2 yes Figure 1 Schematic diagram of the drive unit structure;

[0032] Figure 3 yes Figure 1 Schematic diagram of the bearing structure to be tested;

[0033] The components include: a linear drive mechanism 1, a support plate 2, a positioning part 3, a ball bearing 4, a rotary drive mechanism 5, a driving part 6, a disc end 6a, a cylindrical end 6b, an annular groove 6b1, a camera 7, a buffer plate 8, a bearing under test 9, an inner ring of the bearing under test 9a, a roller 9b, and a cage 9c. Detailed Implementation

[0034] In this embodiment, the bearing 9 under test does not have an outer ring, and the roller 9b is exposed to the outside for a single camera 7 at a nearby fixed point to take pictures.

[0035] This embodiment includes a linear drive mechanism 1, a support plate 2, a positioning part 3, a ball bearing 4, a rotary drive mechanism 5, a driving part 6, and a camera 7.

[0036] The linear drive mechanism 1 is specifically a cylinder. In other embodiments, the linear drive mechanism 1 may also be a hydraulic cylinder or a gear and rack structure.

[0037] In this embodiment, the cylinder is positioned at the bottom, with its output end facing vertically upwards.

[0038] The support plate 2 is a rectangular plate. The support plate 2 is fixed to the output end of the cylinder. The support plate 2 is used to install the positioning part 3 and the ball bearing 4.

[0039] The positioning part 3 is disposed on the support plate 2. The positioning part 3 is specifically cylindrical in shape. The lower end of the positioning part 3 is fixed to the support plate 2 by at least two bolts. In this embodiment, four bolts are specifically provided, mainly to prevent the positioning part 3 from rotating.

[0040] The positioning part 3 is used to insert the inner ring 9a of the bearing to be tested and to position the bearing 9 to be tested. Therefore, the diameter of the positioning part 3 should not be set too small, otherwise the cylindrical end 6b of the driving part 6 may not be able to be inserted accurately. In this embodiment, the diameter of the positioning part 3 is set to be slightly smaller than the inner diameter of the bearing 9 to be tested.

[0041] In this embodiment, a chamfer is also provided on the upper end face of the positioning part 3 to facilitate the insertion of the inner ring 9a of the bearing to be tested.

[0042] The ball bearing 4 specifically adopts a universal ball structure. In this embodiment, six universal balls are provided, which are arranged around the side of the positioning part 3. The universal balls are installed on the support plate 2, and their height after installation is lower than that of the positioning part 3. The installation position of the universal balls corresponds to the lower end face of the inner ring 9a of the bearing to be tested. That is, when the positioning part 3 is inserted into the inner ring 9a of the bearing to be tested, the universal balls can hold against the lower end face of the inner ring 9a of the bearing to be tested.

[0043] This embodiment uses a ball bearing 4 structure, which has at least two functions. On the one hand, it can reduce the frictional resistance of the inner ring 9a of the bearing under test rotating. On the other hand, when the cylindrical end 6b is inserted into the inner ring 9a of the bearing under test, the bearing under test 9 can slide smoothly under the squeezing action of the elastic ring, so that the positioning part 3 is disengaged from the inner wall of the bearing under test 9. Then, the inner ring 9a of the bearing under test will not rub against the positioning part 3 when it rotates, which plays a centering role.

[0044] The rotary drive mechanism 5 is positioned directly above the linear drive mechanism 1, and the rotary drive mechanism 5 is positioned opposite to the linear drive mechanism 1. In this embodiment, the rotary drive mechanism 5 is a geared motor, and the output shaft of the geared motor is coaxial with the central output shaft of the cylinder, with the output shaft of the geared motor facing downwards.

[0045] The drive unit 6 is connected to the output end of the geared motor. The rotation of the geared motor can drive the drive unit 6 to rotate, and the drive unit 6 can in turn drive the inner ring 9a of the bearing under test to rotate around its axis.

[0046] In another embodiment, the driving part 6 is not provided, and the inner ring 9a of the bearing to be tested is directly driven to rotate by the output end of the geared motor.

[0047] Specifically, in this embodiment, the two ends of the driving part 6 are a disc end 6a and a cylindrical end 6b.

[0048] The disc end 6a is disc-shaped, and its size is larger than the inner diameter of the bearing 9 to be tested; the cylindrical end 6b is cylindrical, and its diameter is smaller than the diameter of the inner ring 9a of the bearing to be tested. After the cylindrical end 6b is inserted into the inner ring 9a of the bearing to be tested, the disc end 6a can cover the upper surface of the inner ring 9a of the bearing to be tested.

[0049] In this embodiment, the positioning part 3, the disk end 6a, the cylindrical end 6b, and the output shaft of the geared motor are coaxial.

[0050] To facilitate the insertion of the cylindrical end 6b into the inner ring 9a of the bearing to be tested, this embodiment also provides a chamfer at the end of the driving part 6.

[0051] An annular groove 6b1 is also provided on the side wall of the cylindrical end 6b, and an elastic ring is also provided. The elastic ring is fitted inside the annular groove 6b1. After the cylindrical end 6b is inserted into the inner ring 9a of the bearing to be tested, the elastic ring can squeeze the inner wall of the inner ring 9a of the bearing to be tested. The elastic ring is made of rubber. The elastic ring can drive the inner ring 9a of the bearing to be tested to rotate without damaging the inner wall of the bearing to be tested.

[0052] The rotation of the geared motor drives the drive unit 6 to rotate, and the rotation of the drive unit 6 drives the inner ring 9a of the bearing under test to rotate through the friction between the elastic ring and the inner ring 9a of the bearing under test.

[0053] Preferably, this embodiment also includes a buffer plate 8, which is specifically made of polyurethane material.

[0054] The buffer plate 8 is located between the disc end 6a of the driving part 6 and the output end of the rotary drive mechanism 5. Specifically, the shape and size of the buffer plate 8 are the same as those of the disc end 6a and are stacked on top of each other.

[0055] Driven by the cylinder, when the universal ball and the disc end 6a respectively press against the inner ring 9a of the bearing under test, the buffer plate 8 can play a certain buffering role, which not only ensures the stability of the clamping, but also does not damage the bearing 9 under test.

[0056] This embodiment also provides a detection method, which specifically includes the following steps:

[0057] First, the lower end of the inner ring 9a of the bearing to be tested is fitted onto the positioning part 3, and the ball 4 supports the lower end face of the inner ring 9a of the bearing to be tested.

[0058] Then, the cylinder pushes the bearing 9 to be tested upward, so that the driving part 6 is inserted into the upper end of the inner ring 9a of the bearing to be tested, and the disc end 6a abuts against the upper end face of the inner ring 9a of the bearing to be tested. In this way, the upper and lower end faces of the inner ring 9a of the bearing to be tested are clamped by the disc end 6a and the ball 4 respectively.

[0059] Then, the geared motor starts, and the friction of the rubber ring drives the inner ring 9a of the bearing under test to rotate.

[0060] Finally, the camera 7 takes the picture. The rotation of the bearing under test 9 allows the camera 7 to capture the image of each roller 9b on the bearing under test 9. At the same time, the rotation of the inner ring 9a of the bearing under test can also cause the rollers 9b to rotate around their axis. In this way, the entire arc surface of each roller 9b can be captured.

[0061] In another embodiment, since the roller 9b and the disc end 6a can clamp the two ends of the inner ring 9a of the bearing to be tested, the linear drive mechanism 1 can be positioned above the rotary drive mechanism 5.

[0062] It should be understood that the descriptions of directions or positional relationships such as up, down, left, right, front, back, top, bottom, tail, horizontal, and vertical in this application are all based on the accompanying drawings in the specification and are only used to more clearly express the technical solution and simplify the description, rather than indicating or implying that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as limiting the scope of protection of this application.

[0063] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit the scope of protection of the present invention. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the essence and scope of the technical solutions of the present invention.

Claims

1. A bearing inner ring control device, characterized in that, include: Linear drive mechanism; A support plate fixed to the output end of the linear drive mechanism; A positioning part is provided on the support plate. The positioning part is inserted into one end of the inner ring of the bearing to be tested, and the inner ring of the bearing to be tested can rotate relative to the positioning part. Several balls are mounted on a support plate and surround the positioning part, with the balls facing one end face of the inner ring of the bearing to be inspected; Additionally, a rotary drive mechanism is provided opposite to the linear drive mechanism, the output end of which can drive the other end of the inner ring of the bearing under test to rotate.

2. The bearing inner ring control device and method according to claim 1, characterized in that, Also includes: The drive unit is connected to the output end of the rotary drive mechanism. The end of the drive unit is inserted into the other end of the inner ring of the bearing to be tested. The side wall of the end of the drive unit is provided with an annular groove. Additionally, an elastic ring fitted into the annular groove extends into the inner ring of the bearing under test and can rotate with the rotation drive mechanism, thereby driving the inner ring of the bearing under test to rotate.

3. The bearing inner ring control device and method according to claim 2, characterized in that, The driving department includes: The end of the disc is disc-shaped and its size is larger than the inner diameter of the bearing to be measured; Additionally, a cylindrical end with a diameter slightly smaller than the inner ring of the bearing to be tested has an annular groove located at the cylindrical end.

4. The bearing inner ring control device according to claim 3, characterized in that, A buffer plate is provided between the disc end and the output end of the rotary drive mechanism.

5. A bearing inner ring control device according to claim 3, characterized in that, The linear drive mechanism is located above the rotary drive mechanism.

6. The bearing inner ring control device according to claim 1, characterized in that, The linear drive mechanism is located below the rotary drive mechanism.

7. The bearing inner ring control device according to claim 1, characterized in that, The ball bearings adopt a universal ball structure.

8. A bearing inner ring control device according to claim 1, characterized in that, The linear drive mechanism uses a cylinder; the rotary drive device uses a geared motor.

9. A bearing inner ring control device according to claim 1, characterized in that, Both the positioning part and the driving part have chamfered ends.

10. A bearing inner ring control device according to claim 1, characterized in that, It also includes a detection method, Includes the following steps: S1: The output end of the linear drive mechanism extends linearly, causing the output ends of the ball and the rotary drive mechanism to abut against the two ends of the inner ring of the bearing to be tested, respectively. S2: The output end of the rotary drive mechanism drives the inner ring of the bearing under test to rotate around its axis. S3: A camera placed near the bearing under test captures images of the roller that is both revolving around the sun and rotating on its own axis.

Images