Tool for detecting dynamic unbalance amount of retainer

Abstract

The utility model discloses a tool for detecting the dynamic unbalance amount of a retainer, which comprises a shell and a base, a horizontal bearing surface is formed on the base, the base is provided with a flange along the horizontal bearing surface, a plurality of debugging holes are uniformly distributed on the flange, the debugging holes are arranged along the radial direction of the base, and the debugging holes are arranged on the shell. A debugging hole is formed in the base, a balance screw is matched in the debugging hole in a threaded mode, two pin holes or lock holes are formed in the positions, at trisection points, of the blocking edge, positioning pins used for pressing the test retainer on the horizontal bearing face are arranged in the pin holes, the lock holes are formed in the radial direction of the base, and locking screws are matched in the lock holes in a threaded mode. The device is simple in structure, can accurately and reliably detect the dynamic unbalance amount of the retainer, and has a good use effect.

Description

Technical Field

[0001] The utility model relates to a tooling for detecting the dynamic unbalance of a cage. Background Art

[0002] With the continuous increase of the working speed of bearings, the influence of the bearing cage on its running stability is also increasing. Strictly controlling the dynamic unbalance of the cage can reduce the influence of vibration, noise, eccentric wear, etc. on the service performance and life of the bearing during high-speed operation of the bearing. The existing toolings for detecting the dynamic unbalance of solid cages mainly have the following problems: First, the existing toolings have high machining accuracy requirements, and the perpendicularity difference between the inner hole and the end face, the inner hole size, the geometric tolerance of the inner hole, etc. need to be strictly controlled, which greatly improves the machining difficulty and cost of the tooling; Second, the repeatability and reproducibility of the dynamic unbalance values are poor. Due to the large scatter in batch processing of cages, the concentricity between the cage and the tooling is poor; Third, the tooling and the cage are in clearance fit, which may cause circumferential rotation or radial runout of the cage and the tooling during the detection process, resulting in measurement errors and scratches. Therefore, it is necessary to detect the dynamic unbalance of the solid cage. However, the unbalance of the tooling itself will also affect the unbalance of the cage. The existing detection tooling is not convenient for the installation of the cage and cannot guarantee the detection accuracy. Summary of the Utility Model

[0003] Aiming at the deficiencies of the prior art, the utility model provides a tooling for detecting the dynamic unbalance of a cage, which has a simple structure, can accurately and reliably detect the dynamic unbalance of the cage, and has good use effects.

[0004] To achieve the above object, the utility model provides a tooling for detecting the dynamic unbalance of a cage, including a base, a horizontal bearing surface is formed on the base, a retaining edge is arranged on the base along the horizontal bearing surface, a plurality of debugging holes are evenly distributed on the retaining edge, the debugging holes are arranged along the radial direction of the base, balance screws are in threaded fit in the debugging holes, pin holes or lock holes are arranged at the trisection points on the retaining edge, the number of the pin holes is two, positioning pins for pressing a test cage on the horizontal bearing surface are arranged in the pin holes, the lock holes are arranged along the radial direction of the base, and locking screws are in threaded fit in the lock holes.

[0005] The beneficial effects of such a setting are as follows: By installing the base on the dynamic unbalance measurement tooling, i.e., the vertical balancing machine, the dynamic unbalance of the base is detected by the vertical balancing machine. By adjusting the feeding degree of the balance screws at each position and repeatedly adjusting, the dynamic unbalance of the base is controlled within ≤0.1 g·cm. Then, the cage is fixed on the base. First, the cage is pressed and positioned by the positioning pin to maintain it in a certain position, and then radially pressed by the locking screw to complete the overall positioning. In this way, compared with the original positioning method, the assembly and fitting accuracy of the tooling and the processing technology are improved, and the radial relative displacement between the tooling and the physical cage during the detection of dynamic unbalance is prevented. The locking of a single locking screw can reduce the installation error and improve the repeatability and reproducibility of the detection data. Then, the dynamic unbalance is detected by the vertical balancing machine again, making the data acquisition more accurate. The dynamic unbalance detection error of the physical cage is improved from ≤1 g·cm to ≤0.2 g·cm. At the same time, the overall structure is simple, easy to implement, and has a good use effect.

[0006] As a further setting of the present utility model, a buffer soft pad is coated on the contact end of the locking screw and the cage to be measured.

[0007] The beneficial effects of such a setting are as follows: By doing so, the circumferential rotation or radial movement of the cage and the tooling can be avoided, which may cause measurement errors and scratches, improving the reliability of the structure in use. At the same time, the structure is simple and easy to implement.

[0008] As a further setting of the present utility model, a plurality of mounting holes for installing the base on the vertical balancing machine are provided at the center of the horizontal bearing surface.

[0009] The beneficial effects of such a setting are as follows: By doing so, it is convenient to firmly install the overall structure on the dynamic unbalance detection equipment, with high detection efficiency. At the same time, the structure is simple, easy to implement, and has a good use effect.

[0010] As a further setting of the present utility model, a stepped groove for pre-positioning is provided on the bottom surface of the base.

[0011] The beneficial effects of such a setting are as follows: By doing so, through the stepped groove, it is convenient to pre-position the base on the vertical balancing machine, and then lock and install it through the cooperation of the screw and the mounting hole. This structure is simple, the positioning is convenient, and the installation efficiency is improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 is the front view structure schematic diagram of the embodiment of the present utility model;

[0013] Figure 2 is the sectional view along line A-A of the embodiment of the present utility model Figure 1 in the figure. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0014] The utility model provides a tooling for detecting the dynamic unbalance of a cage as shown in Figure 1 and Figure 2 the figure, which includes a base 1. A horizontal bearing surface is formed on the base 1. A baffle 2 is arranged along the horizontal bearing surface of the base 1. A plurality of debugging holes 21 are evenly distributed on the baffle 2. The debugging holes 21 are arranged along the radial direction of the base 1. Balance screws are in threaded fit with the debugging holes 21. Pin holes 3 or lock holes 4 are arranged at the trisection point positions on the baffle 2. The number of the pin holes 3 is two. Positioning pins 31 for pressing the test cage onto the horizontal bearing surface are arranged in the pin holes 3. The lock holes 4 are arranged along the radial direction of the base 1. Locking screws are in threaded fit with the lock holes 4. The beneficial effects of such a setting are as follows: By installing the base 1 on the tooling for detecting dynamic unbalance, that is, on an upright balancing machine, the dynamic unbalance of the base 1 is detected by the upright balancing machine, and by adjusting the feeding degree of the balance screws at each position and repeatedly adjusting, the dynamic unbalance of the base 1 is controlled to be ≤0.1 g·cm. Then, the cage is fixed on the base 1. First, the cage is pressed and positioned by the positioning pins 31 and kept in a certain position, and then radially pressed by the locking screws to complete the overall positioning. In this way, compared with the original positioning method, the assembly and matching accuracy and processing technology of the tooling are improved, and the radial relative displacement between the tooling and the physical cage during the detection of dynamic unbalance is prevented; the locking of a single locking screw can reduce the installation error and improve the repeatability and reproducibility of the detection data; then, the dynamic unbalance is detected by the upright balancing machine, making the data acquisition more accurate, improving the dynamic unbalance detection error of the physical cage from ≤1 g·cm to ≤0.2 g·cm. At the same time, the overall structure is simple, easy to implement, and has a good use effect.

[0015] As a further setting of this embodiment, a buffer soft pad is coated on the contact end of the locking screw and the cage to be measured. The beneficial effects of such a setting are as follows: By doing so, the circumferential rotation or radial runout of the cage and the tooling can be avoided, which may cause measurement errors and scratches, improving the reliability of the structure in use. At the same time, the structure is simple and easy to implement.

[0016] As a further setting of this embodiment, a plurality of mounting holes 11 for mounting the base 1 on the upright balancing machine are arranged at the center of the horizontal bearing surface. The beneficial effects of such a setting are as follows: By doing so, the overall structure can be firmly installed on the dynamic unbalance detection equipment, with high detection efficiency. At the same time, the structure is simple, easy to implement, and has a good use effect.

[0017] As a further setting of this embodiment, a step groove 12 for pre-positioning is provided on the bottom surface of the base 1. The beneficial effect of such a setting is as follows: With this setting, through the step groove 12, it is convenient to pre-position the base 1 on the vertical balancing machine, and then lock and install it through the cooperation of the screw and the mounting hole 11. This structure is simple, the positioning is convenient, and the installation efficiency is improved.

[0018] The above examples are only one of the preferred specific examples of the present invention. Those ordinary changes and substitutions made by those skilled in the art within the scope of the technical solution of the present invention are included in the protection scope of the present invention.

Claims

1. A tool for detecting dynamic unbalance of a cage, characterized in that: It includes a base, a horizontal bearing surface is formed on the base, a rib is arranged along the horizontal bearing surface, a plurality of debugging holes are evenly distributed on the rib, the debugging holes are arranged radially along the base, the threads in the debugging holes are matched with balance screws, pin holes or lock holes are arranged at the three-divided points on the rib, the number of the pin holes is two, the pin holes are provided with positioning pins for pressing the test holder onto the horizontal bearing surface, the lock hole is arranged radially along the base, and the threads in the lock hole are matched with locking screws.

2. The tooling for detecting dynamic unbalance of a cage according to claim 1 is characterized in that: The abutting end of the locking screw and the holder to be tested is covered with a buffer cushion.

3. The tooling for detecting dynamic unbalance of a cage according to claim 1, characterized in that: The center of the horizontal bearing surface is provided with a plurality of mounting holes for mounting the base on the vertical balancing machine.

4. The tooling for detecting dynamic unbalance of a cage according to claim 1 is characterized in that: The bottom surface of the base is provided with a step groove for pre-positioning.

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