Fan mesh enclosure inspection tool

Abstract

The invention discloses a fan mesh enclosure inspection tool, relates to the technical field of fan mesh enclosure detection, and aims to solve the problem of low mesh enclosure detection efficiency and precision, and the fan mesh enclosure inspection tool comprises a chassis which is provided with a first surface and a central point located at the center of the first surface; the scale sliding rails are arranged on the first surface in the radial direction, scales are arranged on the scale sliding rails, and the length value from the starting scale line to the center point is set as the starting scale; the scale sliding rail is arranged on the base, the sliding block slides in the radial direction of the scale sliding rail, and a positioning column is arranged above the sliding block. According to the fan mesh enclosure inspection tool, the sizes and shapes of fan mesh enclosures of different models can be rapidly and accurately detected, and the detection efficiency and precision are improved.

Description

Technical Field

[0001] The invention relates to the technical field of fan mesh cover detection, and in particular to a fan mesh cover inspection tool. Background Art

[0002] Existing fan grille inspection methods mostly rely on manual measurement, which is inefficient and inaccurate, and is easily affected by the operator's skill level. Single inspection tooling lacks flexibility and is difficult to adapt to the inspection needs of fan grilles of different models. In addition to manual measurement, there are also methods in the prior art that use cameras to shoot and then analyze and compare images to inspect grilles.

[0003] For example, there is a Chinese patent with publication number CN211457367U, which relates to a rapid inspection device for a car audio speaker grille, comprising two front and rear distributed plywood, with brackets fixedly installed on both sides of the bottom surface of the plywood, the plywood is fixed to the ground through the brackets, and bearing through holes are longitudinally opened at both ends of the plywood, the positions of the bearing through holes on the two plywood correspond to each other, and the two bearing through holes in the corresponding positions are rotatably connected with a pulley shaft, and conveyor belt rollers are fixedly installed on the outer periphery of the pulley shaft, and a conveyor belt is installed on the two conveyor belt rollers, and the conveyor belt and the conveyor belt rollers are driven by a power device, and a horizontal platform is provided above the plywood, and the four corners of the bottom surface of the horizontal platform are fixedly connected to the corresponding top surface of the plywood through a support plate, which can adapt to the automated assembly line production process, and is faster, more accurate, and has no missed inspections than manual inspection. However, the Chinese patent with publication number CN211457367U has a complex structure and requires computer image processing, which is costly. Summary of the invention

[0004] In order to solve the problem of low mesh detection efficiency and accuracy, the present invention proposes a fan mesh inspection tool, which can quickly and accurately detect the size and shape of fan meshes of different models, thereby improving the detection efficiency and accuracy.

[0005] In order to achieve the above object, the present invention adopts the following technical solution: a fan mesh inspection tool, comprising: The chassis comprises a first surface and a center point located at the center of the first surface; a plurality of scale rails are radially arranged on the first surface, the plurality of scale rails are all provided with scales, and the length value from the starting scale line to the center point is set as the starting scale; a slider slides radially along the scale rail, and a positioning column is provided above the slider.

[0006] In this technical solution, convenient measurement and adjustment of the mesh cover is achieved through the cooperation of the slide rail, the slider and the positioning column. The size and shape of the fan mesh covers of different models can be detected quickly and accurately, and the detection efficiency and accuracy are improved. This avoids the problems of low efficiency and low accuracy of manual measurement and the high cost of image processing.

[0007] Preferably, the scale rail includes four first scale rails, a second scale rail is provided on the angular bisector of two adjacent first scale rails, and the length of the second scale rail is smaller than that of the first scale rail.

[0008] Preferably, the chassis is in the shape of a flat cylinder, a connecting shaft with a lifting bolt is axially connected to the center point, a flat cylindrical center disk is connected above the connecting shaft, the lifting bolt adjusts the height difference between the center disk and the chassis, and the diameter of the center disk is smaller than the diameter of the chassis.

[0009] Preferably, four third scale rails are radially arranged on the center disk, the central axes of the four third scale rails are respectively collinear with the central axis of the first scale rail, and each of the third scale rails is provided with a sliding block.

[0010] Preferably, the ruler slide rail is a T-shaped long strip structure consisting of a slide rail portion and a support portion connected to the bottom of the slide rail portion, a first groove is provided in the middle of the top surface of the support portion, the scale is arranged in the first groove, the width of the support portion is smaller than the width of the slide rail portion to form a track, and vertical mounting holes are respectively provided at both ends of the ruler slide rail.

[0011] Preferably, a T-shaped slot is provided below the slider to accommodate the slide rail, a vertical blind hole extending inward is provided at the center of the upper surface of the slider, and the positioning column is connected in the blind hole.

[0012] Preferably, the positioning column includes a cylindrical portion and a truncated cone portion connected above the cylindrical portion, the lower bottom surface of the truncated cone portion is connected to the upper bottom surface of the cylindrical portion, the diameter of the lower bottom surface of the truncated cone portion is the same as the diameter of the upper bottom surface of the cylindrical portion, and a connecting piece for connecting a slider is provided on the cylindrical portion.

[0013] Preferably, each of the first scale slide rails is provided with two sliding blocks, and each of the second scale slide rail and the third scale slide rail is provided with a sliding block.

[0014] Preferably, a plurality of rectangular parallelepiped feet are connected below the chassis, and the plurality of feet are distributed in a circle.

[0015] Preferably, the slider is connected with a snap-fit ​​structure that fixes the slider and the ruler slide rail.

[0016] The beneficial effects of the present invention are: 1) It can quickly and accurately detect the size and shape of fan grilles of different models, improve detection efficiency and accuracy, and avoid the problems of low efficiency and low accuracy of manual measurement; 2) Simple structure, easy to install and low cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a front view of a fan mesh inspection tool according to embodiment 2 of the present invention.

[0018] Figure 2 It is a top view of a fan mesh inspection tool according to embodiment 2 of the present invention.

[0019] Figure 3 It is a front view of a fan mesh inspection tool according to embodiment 3 of the present invention.

[0020] Figure 4 It is a top view of a fan mesh inspection tool according to embodiment 3 of the present invention.

[0021] Figure 5 It is a front view of a fan mesh cover inspection tool for inspecting a mesh cover in embodiment 3 of the present invention.

[0022] Figure 6 It is a top view of a fan mesh cover inspection tool for inspecting a mesh cover according to Example 3 of the present invention.

[0023] Figure numerals: base 1; chassis 2; scale rail 3; slider 4; positioning column 5; center plate 6; connecting shaft 7; lifting bolt 8. DETAILED DESCRIPTION

[0024] In order to make the objectives, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific implementation method described herein is only an optimal embodiment of the present invention, which is only used to explain the present invention and does not limit the scope of protection of the present invention. All other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0025] Example 1 The present embodiment provides a fan mesh inspection tool, including a chassis, a scale slide rail and a slider, which can quickly and accurately detect the size and shape of various types of fan meshes related to external rotor fans, improve detection efficiency and accuracy, and is suitable for detecting meshes with inner mounting ears and outer mounting ears in the same horizontal plane.

[0026] In the inspection of the mesh cover, the contents that need to be inspected include the internal installation dimensions and external installation dimensions, the inner diameter of the mesh cover, the flatness and equal division of the mounting feet, the equal division of the four mounting ribs, and the collinearity of the opposing ribs.

[0027] In this embodiment, the chassis is a flat cylindrical structure, a platform for detecting the mesh cover is formed on the chassis, and the chassis has a first surface and a center point located at the center of the first surface.

[0028] Several ruler rails are arranged on the first surface of the chassis. The ruler rails are provided with scales indicating the size. The length value from the starting scale line to the center point is set as the starting scale. The scale on the ruler rail indicates the length from the center point. The slider can slide on the rail to adjust the position of the size to be measured.

[0029] A positioning column is connected above the slider. In the present embodiment, the positioning column is a cylindrical structure. A guiding slope is provided at the top of the positioning column to facilitate the insertion of the positioning column into the mounting ear. A connecting piece is provided at the root of the positioning column to connect the positioning column and the slider together.

[0030] In this embodiment, the connecting member is a thread, and the sliding block is connected to the root of the positioning column thereon by a thread, and different positioning columns can be replaced according to the size to be measured.

[0031] The threaded hole for installing the positioning column on the slider is a blind hole. After adjusting the position of the slider, continue to tighten the positioning column to press it down and fasten it to the surface of the slide rail ruler.

[0032] In this embodiment, the scale rails specifically include four first scale rails and four second scale rails, each scale rail is provided with a slider, the first scale rails and the second scale rails are alternately placed and radially distributed on the chassis, and the central axis of each scale rail passes through the center point.

[0033] Two adjacent first scale rails are perpendicular to each other, two adjacent second scale rails are perpendicular to each other, and the angle between the adjacent first scale rails and the adjacent second scale rails is 45 degrees.

[0034] The length of the first scale rail is greater than that of the second scale rail. Both the first scale rail and the second scale rail have one end arranged on the circumferential edge of the first surface of the chassis. The starting scale line of the first scale rail is closer to the center point than the starting scale line of the second scale rail.

[0035] Each first scale rail is provided with two sliders, and the four first scale rails and the sliders thereon constitute a first detection module, which can measure the sizes of the inner and outer mounting ear holes of the mesh cover, and detect the flatness and equal division of the four mesh cover mounting ears.

[0036] During the inspection, the positioning posts on the slider close to the center point on the first scale rail are inserted into the inner mounting holes of the mesh cover, and the positioning posts on the slider far from the center point on the first scale rail are inserted into the outer mounting holes of the mesh cover, and the positioning posts are observed to see whether the size of the positioning posts matches the size of the mounting holes, and whether the size of the mounting ear holes is qualified. The values ​​of the scales corresponding to the inner and outer mounting holes are read respectively to determine whether the inner and outer mounting ear holes are qualified, and the contact height between the mounting hole and the positioning post and the fit between the mounting hole and the slider are observed to determine the flatness of the mounting ear, and the equal division of the mounting ear is determined according to the connection between the mounting ear and the positioning hole.

[0037] A sliding block is arranged on each second scale rail, and the second scale rail and the sliding block thereon form a second detection module, and the second detection module can detect the inner diameter and roundness of the mesh cover wire.

[0038] During testing, place the sliders on the four second scale rails in the mesh cover so that the positioning posts on the sliders rest against the inner side of the mesh cover wire. Read the scale value from the plumb plane on the side of the slider away from the center point to obtain four inner diameter length values. Judge whether the inner diameter and roundness of the mesh cover wire are qualified based on the four inner diameter lengths.

[0039] In some other embodiments, the mesh cover can be rotated to observe the inner diameter of other positions of the coiled wire, thereby determining whether the roundness of the coiled wire is qualified.

[0040] A plurality of feet are connected to the bottom of the chassis. In this embodiment, the feet are rectangular pillars distributed in a circle and fixed to the bottom surface of the chassis to support the chassis.

[0041] Example 2 This embodiment provides a fan grille inspection tool. Figure 1 and Figure 2 , including a chassis 2, a scale rail 3 and a slider 4, which can quickly and accurately detect the size and shape of various types of fan mesh covers related to external rotor fans, improve the detection efficiency and accuracy, and is suitable for detecting mesh covers with inner mounting ears and outer mounting ears in the same horizontal plane.

[0042] In the inspection of the mesh cover, the contents that need to be inspected include: internal installation dimensions and external installation dimensions, the inner diameter of the mesh cover, the flatness and equal division of the mounting feet, the equal division of the four mounting ribs, and the collinearity of the opposing ribs.

[0043] In this embodiment, the chassis is a flat cylindrical structure, a platform for detecting the mesh cover is formed on the chassis, and the chassis has a first surface and a center point located at the center of the first surface.

[0044] Several ruler rails are arranged on the first surface of the chassis. The ruler rails are provided with scales indicating the size. The length value from the starting scale line to the center point is set as the starting scale. The scale on the ruler rail indicates the length from the center point. The slider can slide on the rail to adjust the position of the size to be measured.

[0045] A positioning column 5 is connected above the slider. In the present embodiment, the positioning column includes a cylindrical portion and a truncated cone portion. The cylindrical portion is a high cylindrical structure, and the truncated cone portion is a truncated cone structure connected above the cylindrical portion. The lower bottom surface of the truncated cone portion is connected to the upper bottom surface of the cylindrical portion.

[0046] The diameter of the lower bottom surface of the truncated cone portion is the same as the diameter of the upper bottom surface of the cylindrical portion, and a connecting piece connected to the sliding block is provided on the cylindrical portion.

[0047] In this embodiment, the connecting member is a thread, and the sliding block is connected to the root of the positioning column thereon by a thread, and different positioning columns can be replaced according to the size to be measured.

[0048] The threaded hole for installing the positioning column on the slider is a through hole. After adjusting the position of the slider, continue to tighten the positioning column to press it down and tighten it on the surface of the slide rail ruler.

[0049] In this embodiment, the scale rails specifically include four first scale rails and four second scale rails, each scale rail is provided with a slider, the first scale rails and the second scale rails are alternately placed and radially distributed on the chassis, and the central axis of each scale rail passes through the center point.

[0050] Two adjacent first scale rails are perpendicular to each other, two adjacent second scale rails are perpendicular to each other, and the angle between the adjacent first scale rails and the adjacent second scale rails is 45 degrees.

[0051] The length of the first scale rail is greater than that of the second scale rail. Both the first scale rail and the second scale rail have one end arranged on the circumferential edge of the first surface of the chassis. The starting scale line of the first scale rail is closer to the center point than the starting scale line of the second scale rail.

[0052] Since the scale rail has a certain width, it is impossible to ensure that all the scale rails are set starting from the center point. In this embodiment, the inner ends of all the scale rails are not distributed on the same circumference. Instead, the first scale rail of the four inner mounting ears that need to be measured is closer to the center point, and the second scale rail is avoided at the center point, so that the inner end of the first scale rail can be closer to the center point position, further increasing the scope of application of the detection tooling.

[0053] Each first scale rail is provided with two sliders, and the four first scale rails and the sliders thereon constitute a first detection module, which can measure the sizes of the inner and outer mounting ear holes of the mesh cover, and detect the flatness and equal division of the four mesh cover mounting ears.

[0054] During the inspection, the positioning posts on the slider close to the center point on the first scale rail are inserted into the inner mounting holes of the mesh cover, and the positioning posts on the slider far from the center point on the first scale rail are inserted into the outer mounting holes of the mesh cover, and the positioning posts are observed to see whether the size of the positioning posts matches the size of the mounting holes, and whether the size of the mounting ear holes is qualified. The values ​​of the scales corresponding to the inner and outer mounting holes are read respectively to determine whether the inner and outer mounting ear holes are qualified, and the contact height between the mounting hole and the positioning post and the fit between the mounting hole and the slider are observed to determine the flatness of the mounting ear, and the equal division of the mounting ear is determined according to the connection between the mounting ear and the positioning hole.

[0055] A sliding block is arranged on each second scale rail, and the second scale rail and the sliding block thereon form a second detection module, and the second detection module can detect the inner diameter and roundness of the mesh cover wire.

[0056] During testing, place the sliders on the four second scale rails in the mesh cover so that the positioning posts on the sliders rest against the inner side of the mesh cover wire. Read the scale value from the plumb plane on the side of the slider away from the center point to obtain four inner diameter length values. Judge whether the inner diameter and roundness of the mesh cover wire are qualified based on the four inner diameter lengths.

[0057] In some other embodiments, the mesh cover can be rotated to observe the inner diameter of other positions of the coiled wire, thereby determining whether the roundness of the coiled wire is qualified.

[0058] In this embodiment, different from Embodiment 1, the upper surface of the ruler slide rail is recessed downward to form a first groove, and the scale is marked in the first groove, so that the scale surface of the ruler slide rail is lower than the planes on both sides, and the slider will not contact the scale surface when sliding on the ruler slide rail, thereby preventing the slider from wearing the scale.

[0059] Example 3 This embodiment provides a fan grille inspection tool, including a chassis, a scale rail and a slider, Figure 3 and Figure 4 , can quickly and accurately detect the size and shape of fan grilles of different models, improve detection efficiency and accuracy. What is different from Example 1 is that a fan grille inspection tool of this embodiment can also detect grilles whose inner mounting ears and outer mounting ears are not in the same horizontal plane.

[0060] When testing a grille whose inner and outer mounting ears are not on the same plane, using a grille with only a chassis cannot meet the testing requirements well.

[0061] The horizontal plane of the inner mounting ears of some mesh covers is higher than the horizontal plane of the outer mounting ears, and the distance is far. When the outer mounting ears are placed on the chassis for detection, the inner mounting ears are much higher than the chassis. Therefore, a very long positioning column is required to measure the inner mounting ears. As a result, the positioning columns need to be frequently replaced when detecting different types of mesh covers, which is time-consuming and labor-intensive. In addition, since the positioning columns are too long, they are more likely to be skewed, which will increase the measurement error.

[0062] In order to solve the above problems, a fan grille inspection tool of this embodiment adds a center plate 6 on the basis of embodiment 2.

[0063] In this embodiment, the center disk includes a flat cylindrical disk, and a connecting shaft 7 extends downward from the center of the bottom of the disk. The connecting shaft is a long cylindrical structure, and a blind hole for connecting the lifting bolt 8 is provided below the connecting shaft. A mounting hole is provided in the middle of the chassis, and the connecting shaft of the center disk is inserted from top to bottom into the mounting hole in the middle of the chassis.

[0064] A lifting bolt is provided under the connecting shaft. The lifting bolt is connected to the blind hole of the connecting shaft of the center plate from the bottom of the chassis. The lifting bolt can be raised and lowered to change the height of the center plate relative to the chassis. In this embodiment, the lifting bolt is connected to the central disk by threaded connection.

[0065] Four third scale rails are arranged on the center plate, and the height of the center plate is adjusted by the lifting bolts below, so that it can be used to measure the mesh cover whose inner mounting ears and outer mounting ears are not in the same horizontal plane.

[0066] In this embodiment, the connecting shaft is a square structure to prevent the center disk from rotating relative to the chassis and ensure that the scale rail of the center disk and the scale rail on the chassis are in the same line.

[0067] Each third scale slide rail is provided with a slide block, and a positioning column is connected above the slide block.

[0068] When the third scale rail is aligned with the first scale rail, it can be used to measure the four inner mounting ear holes of the mesh cover; when the third scale rail is aligned with the second scale rail, it can be used to measure the equal division of the four mounting ribs of the mesh cover and the collinearity consistency of the two opposite mounting ribs.

[0069] A number of feet 1 are connected to the bottom of the chassis. In this embodiment, the feet are rectangular pillars distributed in a circle and fixed to the lower bottom surface of the chassis to support the chassis. Due to the presence of the center plate lifting bolts, the lower surface of the chassis is not a completely flat plane, and the feet are required to support the chassis to keep the chassis level, which is convenient for measuring and inspecting the mesh cover.

[0070] In the inspection of the mesh cover, the contents that need to be inspected include the internal installation dimensions and external installation dimensions, the inner diameter of the mesh cover, the flatness and equal division of the mounting feet, the equal division of the four mounting ribs, and the collinearity of the opposing ribs.

[0071] In this embodiment, the chassis is a flat cylindrical structure, a platform for detecting the mesh cover is formed on the chassis, and the chassis has a first surface and a center point located at the center of the first surface.

[0072] Several ruler rails are arranged on the first surface of the chassis. The ruler rails are provided with scales indicating the size. The length value from the starting scale line to the center point is set as the starting scale. The scale on the ruler rail indicates the length from the center point. The slider can slide on the rail to adjust the position of the size to be measured.

[0073] The ruler slide rail includes a slide rail portion and a support portion, wherein the support portion is connected below the slide rail portion. In this embodiment, the support portion is a T-shaped long strip structure, and the width of the support portion is smaller than that of the slide rail portion to form a track.

[0074] In this embodiment, the upper surface of the ruler slide rail is recessed downward to form a first groove, and the scale is marked in the first groove, so that the scale surface of the ruler slide rail is lower than the two side planes. The slider will not contact the scale surface when sliding on the ruler slide rail, preventing the slider from wearing the scale.

[0075] Vertical mounting holes are respectively provided at both ends of the ruler slide rail, and vertical mounting holes are also provided at corresponding positions of the chassis. In this embodiment, the mounting holes on the ruler slide rail are circular threaded through holes, and the mounting holes on the chassis are circular threaded blind holes. The ruler slide rail is fixedly mounted on the chassis by screws.

[0076] A positioning column is connected above the slider. In the present embodiment, the positioning column includes a cylindrical portion and a truncated cone portion. The cylindrical portion is a high cylindrical structure, and the truncated cone portion is a truncated cone structure connected to the top of the cylindrical portion, so as to facilitate the positioning column to be inserted into the mounting ear. The lower bottom surface of the truncated cone portion is connected to the upper bottom surface of the cylindrical portion.

[0077] The diameter of the lower bottom surface of the truncated cone portion is the same as the diameter of the upper bottom surface of the cylindrical portion, and a connecting piece for connecting a slider is provided on the cylindrical portion.

[0078] In this embodiment, the connecting member is a thread, and the sliding block is connected to the root of the positioning column thereon by a thread, and different positioning columns can be replaced according to the size to be measured.

[0079] The threaded hole for installing the positioning column on the slider is a through hole. After adjusting the position of the slider, continue to tighten the positioning column to press it down and tighten it on the surface of the slide rail ruler.

[0080] In this embodiment, the scale rails specifically include four first scale rails, four second scale rails and four third scale rails, each of which is provided with a slider, the first scale rails and the second scale rails are alternately arranged and radially distributed on the chassis in a circle, the third scale rails are radially arranged on the center disk in a circle distribution, and the central axis of each scale rail passes through the center point.

[0081] Two adjacent first scale rails are perpendicular to each other, two adjacent second scale rails are perpendicular to each other, and the angle between the adjacent first scale rails and the adjacent second scale rails is 45 degrees.

[0082] The length of the first scale rail is greater than that of the second scale rail. Both the first scale rail and the second scale rail have one end arranged on the circumferential edge of the first surface of the chassis. The starting scale line of the first scale rail is closer to the center point than the starting scale line of the second scale rail.

[0083] Each first scale rail is provided with two sliders, and the four first scale rails and the sliders thereon constitute a first detection module, which can measure the position and size of the outer mounting ears of the mesh cover, and detect the flatness and equal division of the four mesh cover mounting ears.

[0084] A sliding block is arranged on each second scale rail, and the second scale rail and the sliding block thereon form a second detection module, and the second detection module can detect the inner diameter and roundness of the mesh cover wire.

[0085] Each third scale rail is provided with a slider, and the four third scale rails and the sliders thereon constitute a third detection module. The first detection module can measure the inner mounting ear hole position and size of the mesh cover, and detect the flatness and equal division of the four mesh cover mounting ears.

[0086] During testing, if Figure 5 and Figure 6 As shown, the positioning posts on the slider away from the center point on the first scale rail are inserted into the outer mounting holes of the mesh cover respectively, and the positioning posts are observed to see whether the size of the positioning posts matches the size of the mounting holes to determine whether the size of the mounting ear holes is qualified. The values ​​of the scales corresponding to the four outer mounting holes are read respectively to determine whether the outer mounting ear holes are qualified. The contact height between the mounting holes and the positioning posts and the fit between the mounting holes and the slider are observed to determine the flatness of the mounting ears. The equal division of the mounting ears is determined according to the connection between the mounting ears and the positioning holes.

[0087] Place the sliders on the four second scale rails in the mesh cover so that the positioning posts on the sliders rest against the inner side of the mesh cover wire, read the scale value from the plumb plane on the side of the slider away from the center point, and obtain four inner diameter length values. Judge whether the inner diameter and roundness of the mesh cover wire are qualified based on the four inner diameter lengths.

[0088] In some other embodiments, the mesh cover can be rotated to observe the inner diameter of other positions of the coiled wire, thereby determining whether the roundness of the coiled wire is qualified.

[0089] The third scale slide rail is fixed at a position colinear with the first scale slide rail, and the positioning posts of the slider on the third scale slide rail are inserted into the inner mounting holes of the mesh cover respectively, and the positioning post size matches the mounting hole size to determine whether the mounting ear hole size is qualified, and the values ​​of the scales corresponding to the inner mounting holes are read respectively to determine whether the inner mounting ear hole positions are qualified, and the contact height between the mounting hole and the positioning post and the fit between the mounting hole and the slider are observed to determine the flatness of the mounting ear, and the equal division degree of the mounting ear is determined according to the connection between the mounting ear and the positioning hole.

[0090] At this time, you can also slide the positioning post on the slider close to the center point of the first ruler slide rail to measure the inner diameter and roundness of each mesh cover wire in turn. The operation only requires sliding the slider, which is convenient and fast and the readings are accurate. It can avoid the tedious operation of manual measurement and prevent errors caused by re-moving the measuring tool for each manual measurement.

[0091] For the mesh cover with mounting ribs, rotate the third scale rail to be collinear with the second scale rail and fix it, fit the positioning column of the slider on the third scale rail to the inner side of the middle hole of the mesh cover, and check the equal division degree of the four mounting ribs of the mesh cover and the collinear consistency of the two opposite mounting ribs.

[0092] In this embodiment, the slider is also connected to a buckle structure that fixes the slider and the scale rail, so that the slider can be fixed at a position of standard size, thereby making real-time and rapid adjustments to the mesh cover.

[0093] A fan mesh inspection tool in the present embodiment realizes convenient measurement and adjustment of the mesh through the cooperation of a slide rail, a slider and a positioning column. It can quickly and accurately detect the size and shape of fan meshes of different models, improve detection efficiency and accuracy, avoid the problems of low efficiency and low accuracy of manual measurement, and avoid the high cost of image processing.

Claims

1. A fan grille inspection tool, characterized in that: include: The chassis comprises a first surface and a center point located at the center of the first surface; a plurality of scale rails are radially arranged on the first surface, the plurality of scale rails are all provided with scales, and the length value from the starting scale line to the center point is set as the starting scale; a slider slides radially along the scale rail, and a positioning column is provided above the slider.

2. A fan grille inspection tool according to claim 1, characterized in that: The scale rails include four first scale rails, a second scale rail is provided on the angular bisector of two adjacent first scale rails, and the length of the second scale rail is less than that of the first scale rail.

3. A fan grille inspection tool according to claim 1, characterized in that: The chassis is in the shape of a flat cylinder, and a connecting shaft with a lifting bolt is axially connected to the center point. A flat cylindrical center disk is connected above the connecting shaft. The lifting bolt adjusts the height difference between the center disk and the chassis, and the diameter of the center disk is smaller than the diameter of the chassis.

4. A fan grille inspection tool according to claim 3, characterized in that: Four third scale rails are radially arranged on the center disk, the central axes of the four third scale rails are respectively collinear with the central axis of the first scale rail, and each of the third scale rails is provided with a sliding block.

5. A fan grille inspection tool according to claim 1, 2 or 4, characterized in that: The ruler slide rail is a T-shaped long strip structure consisting of a slide rail portion and a support portion connected below the slide rail portion. A first groove is provided in the middle of the top surface of the support portion, and the scale is arranged in the first groove. The width of the support portion is smaller than the width of the slide rail portion to form a track. Vertical mounting holes are respectively provided at both ends of the ruler slide rail.

6. A fan grille inspection tool according to claim 1, characterized in that: A T-shaped slot which just accommodates the slide rail is provided below the slide block, a vertical blind hole extending inward is provided in the center of the upper surface of the slide block, and the positioning column is connected in the blind hole.

7. The fan grille inspection tool according to claim 1, characterized in that: The positioning column includes a cylindrical cylindrical portion and a truncated cone portion connected above the cylindrical portion, the lower bottom surface of the truncated cone portion is connected to the upper bottom surface of the cylindrical portion, the diameter of the lower bottom surface of the truncated cone portion is the same as the diameter of the upper bottom surface of the cylindrical portion, and a connecting piece for connecting a slider is provided on the cylindrical portion.

8. The fan grille inspection tool according to claim 4, characterized in that: Each of the first scale rails is provided with two sliding blocks, and each of the second scale rail and the third scale rail is provided with a sliding block.

9. The fan grille inspection tool according to claim 1, characterized in that: A plurality of rectangular parallelepiped feet are connected below the chassis, and the plurality of feet are distributed in a circle.

10. A fan grille inspection tool according to any one of claims 1 to 9, characterized in that: The slider is connected with a buckle structure that fixes the slider and the scale slide rail.

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