Automatic correction device for assembling eccentric shaft of rotor with needle bearing

Abstract

The utility model relates to automatic assembly technical field discloses automatic correction device of rotor eccentric shaft and needle bearing assembly, including the shell, the left and right sides of shell all are fixedly connected with the air cylinder, two the drive end of air cylinder all is fixedly connected with eccentric clamp hand, the bottom fixed connection of shell has the connecting shell, the inner wall fixed connection of connecting shell has the needle bearing piece, the bottom fixed connection of connecting shell has the tool seat, the bottom fixed connection of tool seat has the steel ball bottom plate, the top of steel ball bottom plate is equipped with a plurality of steel ball, the top rotationally connected of steel ball bottom plate has the dismounting assembly for facilitating dismounting bottom plate. In the utility model, the air cylinder makes two eccentric clamp hands close, and the semicircular groove on the upper half of both sides of clamp hand contacts eccentric shaft, has initial eccentricity, and the side corresponding to eccentricity is subjected to counterforce, makes the other side float, makes it balance, realizes automatic correction of rotor eccentric shaft and needle bearing assembly.

Description

Technical Field

[0001] This utility model relates to the field of automated assembly technology, and in particular to an automatic correction device for assembling a rotor eccentric shaft and a needle roller bearing. Background Technology

[0002] An eccentric rotor shaft is a type of shaft component whose axis deviates from its geometric center. It is commonly used in equipment such as motors and compressors, and its special structural design enables specific mechanical movements or functions. Needle roller bearing assembly is the process of combining and installing the inner ring, outer ring, needle rollers, and other components of a needle roller bearing into the corresponding parts of mechanical equipment according to requirements. Needle roller bearings are widely used due to their small cross-section and high load capacity. During the assembly of the eccentric rotor shaft and needle roller bearing, problems such as assembly position deviation and non-compliance with coaxiality standards can easily occur due to factors such as component machining errors and assembly environment interference. This can lead to excessive vibration, high noise, shortened lifespan, and even equipment failure and shutdown during operation. Automatic calibration devices can monitor the assembly status in real time through sensors, accurately identify deviations, and use control components to drive the actuator to automatically adjust, ensuring precise matching between the eccentric rotor shaft and the needle roller bearing, thereby improving assembly accuracy and efficiency, and enhancing the stability and reliability of equipment operation.

[0003] The automatic alignment device for assembling the rotor eccentric shaft and needle roller bearing mainly consists of a sensor assembly, a control assembly, an actuator, and a mechanical body. The sensor assembly monitors parameters such as the assembly position, angle, and clearance of the rotor eccentric shaft and needle roller bearing in real time. The control assembly receives the sensor data, analyzes and calculates the deviation value using algorithms, and then issues control commands. The actuator performs precise position adjustments and angle calibrations according to the commands. The mechanical body provides stable support and a motion platform, supporting the coordinated operation of all components to achieve automated and precise alignment of the assembly process.

[0004] In the existing technology, some automatic correction devices for rotor eccentric shaft and needle roller bearing assembly rely on manual adjustment or positioning by complex sensors for eccentric correction. However, manual correction is inefficient, sensor solutions are costly, and rigid clamping can easily damage the workpiece. Therefore, an automatic correction device for rotor eccentric shaft and needle roller bearing assembly is proposed to solve the above problems. Utility Model Content

[0005] To overcome the above deficiencies, this utility model provides an automatic correction device for the assembly of a rotor eccentric shaft and a needle roller bearing, aiming to improve the problems in the prior art.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] An automatic alignment device for assembling a rotor eccentric shaft and a needle roller bearing includes a housing. Cylinders are fixedly connected to both sides of the housing. An eccentric gripper is fixedly connected to the drive end of each of the two cylinders. A connecting shell is fixedly connected to the bottom of the housing. A needle roller bearing is fixedly connected to the inner wall of the connecting shell. A tooling base is fixedly connected to the bottom of the connecting shell. A steel ball base plate is fixedly connected to the bottom of the tooling base. Multiple steel balls are provided on the top of the steel ball base plate. A disassembly assembly for facilitating the disassembly of the base plate is rotatably connected to the top of the steel ball base plate.

[0008] As a further description of the above technical solution:

[0009] The disassembly assembly includes two rotating plates, the bottom of which is rotatably connected to the top of the steel ball base plate. A limit plate is fixedly connected to the adjacent side of the two rotating plates. A limit ring is fixedly connected to the outside of the tooling base, and a movable ring is fixedly connected to the outside of the tooling base.

[0010] As a further description of the above technical solution:

[0011] The eccentric gripper is externally slidably connected to the inner wall of the housing, and the needle roller bearing is internally fixedly connected to an eccentric shaft.

[0012] As a further description of the above technical solution:

[0013] The upper part of the eccentric gripper is a semi-circular groove with an eccentric diameter, and the inner wall of the circular groove is provided with a polyurethane buffer layer.

[0014] As a further description of the above technical solution:

[0015] The lower half of the eccentric gripper is a semi-circular groove with the diameter of the needle roller bearing tooling, and the inner wall of the semi-circular groove is wrapped with the needle roller bearing component.

[0016] As a further description of the above technical solution:

[0017] The limiting plate is externally rotatably connected to the external slot of the tooling base, and the rotating plate is externally rotatably connected to the external slot of the tooling base.

[0018] As a further description of the above technical solution:

[0019] The inside of the moving ring is in contact with the outside of the two rotating plates, and the bottom of the limiting ring is in contact with the top of the moving ring.

[0020] This utility model has the following beneficial effects:

[0021] 1. In this utility model, the cylinder causes the two eccentric grippers to close, and the semi-circular grooves on the upper part of the grippers on both sides contact the eccentric shaft. When there is an initial eccentricity, the corresponding eccentric side is subjected to a greater reaction force, which pushes the other side to float, thereby balancing it. This achieves automatic correction of the rotor eccentric shaft and needle roller bearing assembly. In addition, it can greatly improve the assembly accuracy of the rotor eccentric shaft and needle roller bearing, thereby avoiding the problem of poor fit caused by human operation error.

[0022] 2. In this utility model, the operator moves the moving ring upward so that it contacts the top limiting ring. At this time, the operator rotates the rotating plate to make the internal limiting plate rotate out, thereby realizing the quick disassembly of the base plate. In addition, it can greatly shorten the time for equipment maintenance and component replacement, thus facilitating the quick repair of base plate related components or replacement of worn parts. Attached Figure Description

[0023] Figure 1 This is a three-dimensional schematic diagram of the automatic correction device for assembling a rotor eccentric shaft and a needle roller bearing proposed in this utility model.

[0024] Figure 2 This is a schematic diagram of the eccentric shaft of the automatic correction device for assembling a rotor eccentric shaft and a needle roller bearing proposed in this utility model.

[0025] Figure 3 This is a schematic diagram of the eccentric gripper of the automatic correction device for assembling a rotor eccentric shaft and a needle roller bearing proposed in this utility model.

[0026] Figure 4 This is a schematic diagram of the tooling base for the automatic alignment device for assembling the rotor eccentric shaft and needle roller bearing proposed in this utility model.

[0027] Legend:

[0028] 1. Outer shell; 2. Cylinder; 3. Eccentric gripper; 4. Needle roller bearing body; 5. Tooling seat; 6. Steel ball; 7. Limiting ring; 8. Moving ring; 9. Steel ball base plate; 10. Rotating plate; 11. Limiting plate; 12. Eccentric shaft; 13. Connecting shell. Detailed Implementation

[0029] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0030] Reference Figure 2 and Figure 3 This utility model provides an embodiment of an automatic correction device for assembling a rotor eccentric shaft and a needle roller bearing. The device includes a housing 1, which serves as the main frame of the entire device, providing a stable mounting base and protective space for the internal components. It also guides the movement of the clamping components. Cylinders 2 are fixedly connected to both sides of the housing 1. Under the action of the gripper drive mechanism, both cylinders 2 operate together, stabilizing the movement of the clamping components. Eccentric grippers 3 are fixedly connected to the drive ends of both cylinders 2. The eccentric grippers 3 are connected to the drive ends of the cylinders 2 and are key components that directly perform the clamping action. They receive the pushing force from the cylinders 2 and move within the housing 1. A connecting shell 13 is fixedly connected to the bottom of the housing 1, protecting the internal structure. Needle roller bearings are fixedly connected to the inner wall of the connecting shell 13. The needle bearing is installed on the inner wall of the connecting shell 13. Utilizing the rolling friction characteristics of the needle rollers, it reduces friction in rotating parts during movement, supports the rotational movement of components such as the eccentric shaft, and ensures the smoothness and precision of component movement during assembly. A fixture 5 is fixedly connected to the bottom of the connecting shell 13. The fixture 5 serves as an intermediate connecting component between the connecting shell 13 and the ball bearing base 9, bearing the weight of the upper connecting shell 13 and internal components, and transferring it to the ball bearing base 9. The bottom of the fixture 5 is fixedly connected to the ball bearing base 9, which protects the internal ball bearings, ensuring stable operation of the internal ball bearings under the action of other components. Multiple steel balls 6 are provided on the top of the ball bearing base 9. The steel balls 6 receive the pushing force from other components, allowing them to slide and enabling the other components to move in all directions. A disassembly assembly for easy removal of the base plate is rotatably connected to the top of the ball bearing base 9.

[0031] Reference Figure 2 and Figure 4 The disassembly assembly includes two rotating plates 10, the bottom of which is rotatably connected to the top of the steel ball base plate 9. The rotating plates 10 receive external force and thus rotate. Limiting plates 11 are fixedly connected to the adjacent sides of the two rotating plates 10. The limiting plates 11 rotate with the rotating plates 10, thereby limiting other components. A limiting ring 7 is fixedly connected to the outside of the tooling base 5. A movable ring 8 is fixedly connected to the outside of the tooling base 5. The movable ring 8 receives the pushing force of the operator and thus moves. Because it has a friction ring inside, it cannot slide in the middle part of the rotating plate 10. The limiting ring 7 limits the movable ring 8 upward, causing the movable ring 8 to move upward and be fixed.

[0032] Reference Figures 1 to 3The eccentric gripper 3 is externally slidably connected to the inner wall of the outer shell 1. The gripper can move smoothly within the track defined by the outer shell 1, ensuring the accuracy of its movement trajectory. An eccentric shaft is fixedly connected inside the needle roller bearing component. The eccentric shaft is securely installed inside the needle roller bearing component. Utilizing the low rolling friction characteristic of the needle roller bearing component, the upper part of the eccentric gripper 3 is a semi-circular groove with an eccentric diameter. The semi-circular groove makes it easy to clamp the component. The inner wall of the circular groove is provided with a polyurethane buffer layer to cushion and prevent damage to the clamped component. The lower part of the eccentric gripper 3 is a semi-circular groove with a needle roller bearing tooling diameter. The semi-circular groove with a needle roller bearing tooling diameter is used to clamp the roller bearing. The diameter of the needle bearing fixture is fixed to ensure stability. The inner wall of the semi-circular groove encloses the needle roller bearing component, which contacts the equipment for stability. The outer side of the limiting plate 11 is rotatably connected to the outer groove of the fixture base 5, and the outer side of the rotating plate 10 is also rotatably connected to the outer groove of the fixture base 5. The rotating plate 10 drives the limiting plate 11 to rotate, causing it to enter the interior of the fixture base 5 for stability. The interior of the moving ring 8 contacts the exterior of the two rotating plates 10. The moving ring 8 moves under the action of the operator, thereby limiting the rotating plate 10. The bottom of the limiting ring 7 contacts the top of the moving ring 8, limiting the moving ring 8 and preventing it from moving.

[0033] Working principle: First, the operator starts the calibration program of the PLC, which causes the cylinder 2 to drive the eccentric gripper 3 to move closer together and close. During the closing process, the semi-circular grooves on the upper part of the grippers on both sides come into contact with the eccentric shaft 12. When the initial eccentricity occurs, if the effect is on the left side, the left gripper will be subjected to a greater reaction force, which will push the mounting base of the eccentric gripper 3 to float to the right, allowing the steel ball at the bottom to move until the forces on both sides are balanced. At this time, the axis of the gripper and the axis of the eccentric shaft automatically coincide.

[0034] Then, when the calibration is completed and the internal steel balls need to be replaced, the operator moves the moving ring 8 so that the moving ring 8 is freed from the restriction of the rotating plate 10. At this time, the operator can rotate the rotating plate 10, which in turn drives the limiting plate 11 to rotate, so that the limiting plate 11 is freed from the rotating plate 10, thereby allowing the tooling seat 5 to be freed from the steel ball base plate 9.

[0035] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. 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.

Claims

1. An automatic alignment device for assembling a rotor eccentric shaft and a needle roller bearing, comprising a housing (1), characterized in that: Cylinders (2) are fixedly connected to both the left and right sides of the outer shell (1). An eccentric gripper (3) is fixedly connected to the driving end of each of the two cylinders (2). A connecting shell (13) is fixedly connected to the bottom of the outer shell (1). A needle roller bearing (4) is fixedly connected to the inner wall of the connecting shell (13). A tooling seat (5) is fixedly connected to the bottom of the connecting shell (13). A steel ball base plate (9) is fixedly connected to the bottom of the tooling seat (5). A plurality of steel balls (6) are provided on the top of the steel ball base plate (9). A disassembly assembly for easy disassembly of the base plate is rotatably connected to the top of the steel ball base plate (9).

2. The automatic correction device for assembling a rotor eccentric shaft and a needle roller bearing according to claim 1, characterized in that: The disassembly assembly includes two rotating plates (10), the bottom of which is rotatably connected to the top of the steel ball base plate (9). Limiting plates (11) are fixedly connected to the adjacent sides of the two rotating plates (10). A limiting ring (7) is fixedly connected to the outside of the tooling base (5), and a movable ring (8) is fixedly connected to the outside of the tooling base (5).

3. The automatic correction device for assembling a rotor eccentric shaft and a needle roller bearing according to claim 1, characterized in that: The eccentric gripper (3) is externally slidably connected to the inner wall of the outer shell (1), and the eccentric shaft (12) is fixedly connected to the inside of the needle roller bearing (4).

4. The automatic alignment device for assembling a rotor eccentric shaft and a needle roller bearing according to claim 1, characterized in that: The upper part of the eccentric gripper (3) is a semi-circular groove with an eccentric diameter, and the inner wall of the circular groove is provided with a polyurethane buffer layer.

5. The automatic alignment device for assembling a rotor eccentric shaft and a needle roller bearing according to claim 1, characterized in that: The lower half of the eccentric gripper (3) is a semi-circular groove with the diameter of the needle roller bearing tooling, and the inner wall of the semi-circular groove is wrapped with the needle roller bearing component (4).

6. The automatic correction device for assembling a rotor eccentric shaft and a needle roller bearing according to claim 2, characterized in that: The limiting plate (11) is externally rotatably connected to the external slot of the tooling base (5), and the rotating plate (10) is externally rotatably connected to the external slot of the tooling base (5).

7. The automatic correction device for assembling a rotor eccentric shaft and a needle roller bearing according to claim 2, characterized in that: The interior of the moving ring (8) is in contact with the exterior of the two rotating plates (10), and the bottom of the limiting ring (7) is in contact with the top of the moving ring (8).

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