Fixture for detecting defects of cooling fan impeller

Abstract

The utility model discloses a fixture for detecting the defects of a cooling fan impeller, which comprises a detection unit, a detection assembly, a limiting unit and a control unit, the detection unit comprises a detection table and a connecting frame fixedly connected to the top of the detection table, the detection assembly is used for detecting the defects of the fan impeller, and the limiting unit is arranged on the detection table and used for detecting the defects of the fan impeller. The limiting unit is used for limiting the fan impeller, the rotating unit is arranged on the detection table, a clamping unit is arranged on the rotating unit, the rotating unit is used for driving the clamping unit to rotate, and the clamping unit is used for clamping and fixing the fan impeller. According to the utility model, the inner cavity of the wheel disc of the fan impeller can be clamped and limited through the clamping unit, and the top of the fan impeller can be limited through the limiting unit, so that the fan impeller can be clamped and fixed without being in contact with blades, and nondestructive detection can be carried out on the defects of the fan impeller by using the detection assembly.

Description

Technical Field

[0001] This utility model relates to the field of fixture technology, and in particular to a fixture for detecting defects in cooling fan impellers. Background Technology

[0002] A cooling fan impeller is a mechanical component used to enhance the heat dissipation effect of equipment. It mainly consists of blades, a shaft, and a casing. The shaft provides rotational support, while the casing protects and guides fluid flow. The cooling fan impeller drives airflow through high-speed rotation, carrying away heat from inside the equipment, thereby achieving a heat dissipation effect. Cooling fan impellers are widely used in various equipment, such as air conditioners, fans, and computers, to ensure stable operation of the equipment in high-temperature environments.

[0003] During the production process, it is necessary to inspect the surface of the fan blades of the fan impeller for defects. Currently, most common fixtures use the method of clamping both sides of the horizontally placed fan impeller. However, when dealing with fan impellers with some blades that are relatively large, the fixture often cannot stably clamp the impeller and other parts, and can only clamp the blades. However, the blades themselves are relatively fragile, and direct clamping can easily lead to bending and damage of the blades. Moreover, simply clamping the blades cannot provide sufficient stability. During the inspection process, the fan impeller may shake or shift, which will affect the accuracy of the inspection results. Therefore, a fixture for defect inspection of cooling fan impellers is proposed. Utility Model Content

[0004] The purpose of this section is to outline some aspects of embodiments of the present invention and to briefly describe some preferred embodiments. Simplifications or omissions may be made in this section, as well as in the abstract and title of this application, to avoid obscuring the purpose of these documents; however, such simplifications or omissions should not be construed as limiting the scope of the present invention.

[0005] In view of the problems existing in the above-mentioned fixture for detecting defects in cooling fan impellers, this utility model is proposed.

[0006] Therefore, the purpose of this utility model is to provide a fixture for detecting defects in cooling fan impellers. It is suitable for solving the problem that some fan impellers have excessively large blade sizes, which means that the fixture can only hold the blades of the fan impeller. This not only easily leads to the blades bending and being damaged, but also makes it difficult to provide sufficient stability by simply holding the blades. During the detection process, the fan impeller may shake, thus affecting the accuracy of the detection results.

[0007] To solve the above-mentioned technical problems, this utility model provides the following technical solution: a fixture for detecting defects in a cooling fan impeller, comprising:

[0008] The detection unit includes a detection table and a connecting frame fixedly connected to the top of the detection table. The detection unit also includes a detection component for detecting defects in the fan impeller.

[0009] A limiting unit is installed on the detection platform, and the limiting unit is used to limit the movement of the fan impeller;

[0010] A rotating unit is mounted on a testing platform. A clamping unit is provided on the rotating unit. The rotating unit is used to drive the clamping unit to rotate, and the clamping unit is used to clamp and fix the fan impeller.

[0011] As a preferred embodiment of the fixture for detecting defects in a cooling fan impeller as described in this utility model, the detection component includes an electric push rod fixedly installed on the top of the connecting frame, and a vision inspection instrument is fixedly installed at the output end of the electric push rod.

[0012] As a preferred embodiment of the fixture for detecting defects in cooling fan impellers according to this utility model, the limiting unit includes a drive motor fixedly installed at the bottom of the testing platform. The output shaft of the drive motor passes through the testing platform and is fixedly connected to an L-shaped plate. An electric telescopic rod is fixedly installed on the top of the L-shaped plate. The output shaft of the electric telescopic rod slides through the L-shaped plate, and the output end of the electric telescopic rod is rotatably connected to a limiting plate.

[0013] In a preferred embodiment of the fixture for detecting defects in a cooling fan impeller as described in this utility model, an anti-slip pad is fixedly connected to the bottom of the limiting plate, and the diameter of the anti-slip pad is larger than the diameter of the limiting plate.

[0014] As a preferred embodiment of the fixture for detecting defects in cooling fan impellers according to this utility model, the rotating unit includes a servo motor fixedly installed at the bottom of the testing platform. The output end of the servo motor passes through the testing platform and is fixedly connected to a concave disk. The fan impeller is placed in the concave surface of the concave disk.

[0015] As a preferred embodiment of the fixture for detecting defects in a cooling fan impeller according to the present invention, the clamping unit includes a rotating rod rotatably connected to the side wall of a concave plate, a sliding groove is provided at the bottom of the concave surface of the concave plate, two clamping plates are slidably disposed in the sliding groove of the concave plate, one end of the rotating rod passes through the concave plate and is fixedly connected to a threaded rod, and both clamping plates are threadedly sleeved on the threaded rod.

[0016] As a preferred embodiment of the fixture for detecting defects in a cooling fan impeller as described in this utility model, the top of each of the two clamping plates is provided with a pair of screw holes, and the top of each of the two clamping plates is fixed with a limit plate by bolts and screw holes.

[0017] As a preferred embodiment of the fixture for detecting defects in a cooling fan impeller as described in this utility model, wherein: a rubber block is fixedly connected to one side of each of the two limiting plates, and the shape of the two rubber blocks is semi-circular tubular.

[0018] The beneficial effects of this utility model are as follows: the clamping unit can clamp and limit the inner cavity of the impeller, and the limiting unit can limit the top of the impeller. Thus, the impeller can be clamped and fixed without contacting the blades, so that the defects of the impeller can be non-destructively detected by the detection component. Attached Figure Description

[0019] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. Among them:

[0020] Figure 1 This is a schematic diagram of the overall structure of the fixture for detecting defects in cooling fan impellers proposed in this utility model;

[0021] Figure 2 This is a partial cross-sectional view of the testing platform proposed in this utility model;

[0022] Figure 3 This is a schematic diagram of the clamping unit structure proposed in this utility model. Attached image description:

[0024] 100. Detection unit; 101. Detection table; 102. Connecting frame; 103. Detection components; 1031. Electric push rod; 1032. Vision inspection instrument;

[0025] 200. Limiting unit; 201. Drive motor; 202. L-shaped plate; 203. Electric telescopic rod; 204. Limiting disc; 205. Anti-slip mat;

[0026] 300. Rotary unit; 301. Servo motor; 302. Concave disk;

[0027] 400. Clamping unit; 401. Rotating rod; 402. Clamping plate; 403. Threaded rod; 404. Limiting plate; 405. Rubber block. Detailed Implementation

[0028] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings.

[0029] Many specific details are set forth in the following description in order to provide a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Those skilled in the art can make similar extensions without departing from the spirit of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0030] Secondly, the term "an embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The phrase "in one embodiment" appearing in different places in this specification does not necessarily refer to the same embodiment, nor is it a single embodiment or an embodiment selectively excluded from other embodiments.

[0031] Secondly, this utility model is described in detail with reference to the schematic diagrams. When describing the embodiments of this utility model, for ease of explanation, the cross-sectional views illustrating the device structure may be partially enlarged, not adhering to the usual scale. Furthermore, the schematic diagrams are merely examples and should not limit the scope of protection of this utility model. In addition, actual manufacturing should include the three-dimensional spatial dimensions of length, width, and depth.

[0032] Example 1

[0033] Reference Figures 1-3 The first embodiment of this utility model provides a fixture for detecting defects in a cooling fan impeller, comprising: a detection unit 100, a limiting unit 200, a rotating unit 300, and a clamping unit 400.

[0034] The detection unit 100 includes a detection table 101 and a connecting frame 102 fixedly connected to the top of the detection table 101. The detection unit 100 also includes a detection component 103 for detecting defects in the fan impeller.

[0035] The limiting unit 200 is installed on the detection table 101, and the limiting unit 200 is used to limit the impeller;

[0036] The rotating unit 300 is mounted on the testing table 101. The rotating unit 300 is equipped with a clamping unit 400. The rotating unit 300 is used to drive the clamping unit 400 to rotate, and the clamping unit 400 is used to clamp and fix the fan impeller.

[0037] The impeller disc is hollow to accommodate components such as bearings or shafts. The clamping unit 400 clamps and limits the inner cavity of the disc, and the limiting unit 200 limits the top of the disc. This allows the impeller to be clamped and fixed without contacting the blades, thus avoiding damage to the blades. The rotating unit 300 drives the impeller to rotate so that the detection component 103 can perform comprehensive inspection of defects in the impeller.

[0038] Example 2

[0039] Reference Figure 1 This is the second embodiment of the present invention. Unlike the previous embodiment, the detection component 103 includes an electric push rod 1031 fixedly installed on the top of the connecting frame 102, and a visual inspection instrument 1032 is fixedly installed at the output end of the electric push rod 1031.

[0040] The electric push rod 1031 is used to drive the vision inspection instrument 1032 to move laterally, so as to move the vision inspection instrument 1032 above the fan impeller and facilitate the vision inspection instrument 1032 to perform defect detection on the fan impeller. A camera is set below the vision inspection instrument 1032, and the fan impeller to be inspected is converted into an image signal through an image acquisition device to extract the features of the fan impeller, thereby quickly and accurately identifying the minute defects on the surface of the fan impeller and completing the inspection.

[0041] Example 3

[0042] Reference Figure 1 and Figure 2 This is the third embodiment of the present invention. Unlike the previous embodiment, the limiting unit 200 includes a drive motor 201 fixedly installed at the bottom of the detection table 101. The output shaft of the drive motor 201 passes through the detection table 101 and is fixedly connected to an L-shaped plate 202. An electric telescopic rod 203 is fixedly installed on the top of the L-shaped plate 202. The output shaft of the electric telescopic rod 203 slides through the L-shaped plate 202, and the output end of the electric telescopic rod 203 is rotatably connected to a limiting disk 204.

[0043] After the fan impeller is clamped and fixed by the clamping unit 400, the drive motor 201 drives the L-shaped plate 202 to rotate, so as to move the limiting plate 204 above the fan impeller. The electric telescopic rod 203 then drives the limiting plate 204 to descend, so as to clamp and limit the top of the fan impeller. The electric telescopic rod 203 can be used in conjunction with pressure sensors and other devices to ensure that the limiting plate 204 can rotate smoothly while preventing the fan impeller from being squeezed and deformed. In this way, it can work with the clamping unit 400 to clamp and fix the fan impeller.

[0044] Specifically, an anti-slip pad 205 is fixedly connected to the bottom of the limiting plate 204, and the diameter of the anti-slip pad 205 is larger than the diameter of the limiting plate 204.

[0045] The anti-slip pad 205 is used to increase the friction between the limit plate 204 and the fan impeller, so that the limit plate 204 can rotate through the anti-slip pad 205, thus ensuring that the limit plate 204 and the fan impeller will not wear due to slippage.

[0046] Example 4

[0047] Reference Figures 1-3 This is the fourth embodiment of the present utility model. Unlike the previous embodiment, the rotating unit 300 includes a servo motor 301 fixedly installed at the bottom of the detection table 101. The output end of the servo motor 301 passes through the detection table 101 and is fixedly connected to a concave disk 302. A fan impeller is placed in the concave surface of the concave disk 302.

[0048] The fan impeller is placed in the concave plate 302 and clamped and fixed by the clamping unit 400. The fan impeller can be rotated by the servo motor 301 so that the vision inspection instrument 1032 can perform defect detection on the fan impeller.

[0049] It should be noted that the clamping unit 400 includes a rotating rod 401 rotatably connected to the side wall of the concave plate 302. A groove is provided at the bottom of the concave surface of the concave plate 302. Two clamping plates 402 are slidably arranged in the groove of the concave plate 302. One end of the rotating rod 401 passes through the concave plate 302 and is fixedly connected to a threaded rod 403. Both clamping plates 402 are threaded onto the threaded rod 403.

[0050] The threaded rod 403 has two threads in opposite directions. Two clamping plates 402 are located on the two opposite threads respectively. By rotating the rotating rod 401, the threaded rod 403 can be rotated, causing the two clamping plates 402 to move closer or further apart in the groove of the concave disc 302. By placing the fan impeller in the concave disc 302 and inserting the two clamping plates 402 into the inner cavity of the disc, and then rotating the rotating rod 401, the two clamping plates 402 are moved away from each other and come into contact with the inner wall of the disc, thereby clamping the inner wall of the disc and achieving the clamping of the fan impeller. Then, the fan impeller can be driven to rotate stably. By rotating the rotating rod 401 in the opposite direction, the two clamping plates 402 are brought closer together, thereby releasing the clamping of the fan impeller.

[0051] Specifically, a pair of screw holes are provided on the top of each of the two clamping plates 402, and a limit plate 404 is fixed to the top of each of the two clamping plates 402 by bolts and screw holes.

[0052] When the inner cavity of the fan impeller is deep, a limiting plate 404 is installed on the clamping plate 402 by bolts to increase the height of the clamping plate 402, thereby clamping the fan impeller more securely. The limiting plate 404 can be set with multiple different lengths to provide secure clamping for fan impellers with different inner cavity depths.

[0053] In addition, rubber blocks 405 are fixedly connected to one side of each of the two limiting plates 404, and the two rubber blocks 405 are both semi-circular tubular in shape.

[0054] When the two clamping plates 402 move away from each other and clamp the inner cavity of the wheel, the semi-circular tubular rubber block 405 will contact the inner cavity of the wheel first to ensure that the edge of the limiting plate 404 will not leave indentations on the inner wall of the wheel, and the rubber block 405 can prevent the fan impeller from slipping between the two clamping plates 402 during rotation.

[0055] During use, the drive motor 201 first drives the L-shaped plate 202 to rotate, so that the limiting plate 204 moves away from the top of the concave plate 302. Then, the fan impeller is placed on the concave plate 302. When the two clamping plates 402 are inserted into the inner cavity of the wheel, the rotating rod 401 is rotated to make the two clamping plates 402 move away from each other, and the rubber block 405 clamps the inner wall of the fan impeller. Then, the electric push rod 1031 moves the vision inspection instrument 1032 to the top of the fan impeller to detect defects at the center of the top of the fan impeller. After the inspection is completed, the electric push rod 1031 moves the vision inspection instrument 1032 to the fan blade of the fan impeller. Then, the drive motor 201 drives the L-shaped plate 202 to rotate, so that the limiting plate 204 moves to the top of the fan impeller.

[0056] At this time, the electric telescopic rod 203 drives the limiting plate 204 to descend, so that the limiting plate 204, together with the anti-slip pad 205, clamps and limits the top of the fan impeller. Then, the servo motor 301 drives the concave plate 302 to rotate, so that the vision inspection instrument 1032 can perform defect detection on the fan blades of the fan impeller. After the detection is completed, the servo motor 301 stops rotating, and the electric push rod 1031 pulls the vision inspection instrument 1032 away from the fan impeller. Then, the electric telescopic rod 203 drives the limiting plate 204 to rise, and the drive motor 201 drives the limiting plate 204 away from the top of the concave plate 302. Then, the rotating rod 401 is rotated in the opposite direction to bring the two clamping plates 402 closer to each other, thereby removing the fan impeller from the concave plate 302.

[0057] It should be noted that the above embodiments are only used to illustrate the technical solution of this utility model and are not intended to limit it. Although this utility model 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 solution of this utility model without departing from the spirit and scope of the technical solution of this utility model, and all such modifications or substitutions should be covered within the scope of the claims of this utility model.

Claims

1. A jig for heat dissipation fan blade wheel defect detection, characterized by, The utility model relates to a fan blade detection device, which comprises the following components: a detection unit (100) comprising a detection table (101) and a connecting frame (102) fixedly connected to the top of the detection table (101), the detection unit (100) further comprising a detection assembly (103) for detecting defects of a fan blade; a limiting unit (200) arranged on the detection table (101), the limiting unit (200) being used for limiting the fan blade; a rotating unit (300) arranged on the detection table (101), the rotating unit (300) being provided with a clamping unit (400), the rotating unit (300) being used to drive the clamping unit (400) to rotate, and the clamping unit (400) being used to clamp and fix the fan blade.

2. The fixture for detecting defects of a fan wheel of a heat dissipation fan according to claim 1, wherein: The detection assembly (103) comprises an electric push rod (1031) fixedly installed on the top of the connecting frame (102), and the output end of the electric push rod (1031) is fixedly installed with a visual detector (1032).

3. The fixture for detecting defects in a fan wheel of a heat dissipation fan according to claim 1, wherein: The limiting unit (200) comprises a drive motor (201) fixedly installed on the bottom of the detection table (101), the output shaft of the drive motor (201) penetrates through the detection table (101) and is fixedly connected with an L-shaped plate (202), the top of the L-shaped plate (202) is fixedly installed with an electric telescopic rod (203), the output shaft of the electric telescopic rod (203) slidably penetrates through the L-shaped plate (202), and the output end of the electric telescopic rod (203) is rotatably connected with a limiting disc (204).

4. The fixture for detecting defects of a fan wheel of a heat dissipation fan according to claim 3, wherein: The bottom of the limiting disc (204) is fixedly connected with an anti-skid pad (205), and the diameter of the anti-skid pad (205) is greater than that of the limiting disc (204).

5. The fixture for detecting defects in a fan wheel of a heat dissipation fan according to claim 3, wherein: The rotating unit (300) comprises a servo motor (301) fixedly installed on the bottom of the detection table (101), the output end of the servo motor (301) penetrates through the detection table (101) and is fixedly connected with a concave disc (302), and the concave disc (302) is placed with a fan blade in the concave surface.

6. The fixture for detecting defects in a heat dissipation fan wheel according to claim 5, wherein: The clamping unit (400) comprises a rotating rod (401) rotatably connected to the side wall of the concave disc (302), the concave bottom of the concave disc (302) is provided with a sliding groove, two clamping plates (402) are slidably arranged in the sliding groove of the concave disc (302), one end of the rotating rod (401) penetrates through the concave disc (302) and is fixedly connected with a threaded rod (403), and the two clamping plates (402) are threadedly sleeved on the threaded rod (403).

7. The fixture for detecting defects in a heat dissipation fan wheel according to claim 6, wherein: A pair of screw holes are formed in the top of each of the two clamping plates (402), and a limiting plate (404) is fixed to the top of each of the two clamping plates (402) through bolts and screw holes.

8. The fixture for detecting defects in a heat dissipation fan wheel according to claim 7, wherein: Rubber blocks (405) are fixedly connected to one side of each of the two limiting plates (404), and the rubber blocks (405) are semicircular tubes in shape.

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