An appearance defect detection device for automobile brake calipers

Abstract

A device for detecting appearance defects of automobile brake calipers belongs to the technical field of appearance detection, and is designed to solve the problem that the existing visual detection device is not efficient enough when performing large-scale detection of brake calipers; the present invention fixes the brake caliper by expanding the positioning disk, drives the rotating disk to rotate half a circle by the reduction motor, the fan gear and the large spur gear, and then performs appearance detection, when the rotating disk moves the brake caliper to the lower position of the rotating disk, the fan gear drives the small spur gear and then drives the protrusion to rotate half a circle, the protrusion on the protrusion pushes up the sliding frame, so that the two groups of positioning disks shrink inward, and the brake caliper is replaced under the cooperation of the conveyor belt and the ejection cylinder, and then the fan gear drives the small spur gear to rotate half a circle again, the sliding frame, the extrusion block, the extrusion rod and the positioning disk are reset, the positioning disk is expanded to continue to clamp the brake caliper, and the detection is cyclically performed, thereby realizing automatic loading and unloading, automatic positioning and automatic detection, and the detection efficiency is high.

Description

Technical Field

[0001] The invention relates to the technical field of appearance detection, and in particular to an appearance defect detection device for an automobile brake caliper. Background Art

[0002] Automobile brake calipers are an important part of the automobile braking system. Their main function is to slow down and stop the vehicle by clamping the brake disc or brake drum and applying pressure. Appearance inspection is aimed at discovering possible defects on the surface of the brake caliper, such as scratches, dents, rust, uneven paint, etc. These defects not only affect the aesthetics of the product, but may also have an adverse effect on the braking performance and even threaten driving safety.

[0003] At present, the appearance inspection of automobile brake calipers mostly relies on high-precision industrial cameras for visual inspection. The industrial camera detects and captures the image data of the brake caliper, and the image processing system is responsible for receiving the image data taken by the industrial camera and performing preprocessing, feature extraction, defect recognition and other operations. In the actual operation process, due to the irregular shape of the brake caliper and the need to perform appearance inspection on multiple sides, the mass-produced brake calipers need to be fixed during inspection and visually identified from multiple sides, and the overall efficiency is not high enough. Summary of the invention

[0004] The purpose of the present invention is to provide a device for detecting appearance defects of automobile brake calipers, which solves the problem that the existing visual inspection devices in the background art are not efficient enough when performing large-scale inspections on brake calipers.

[0005] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: an appearance defect detection device for automobile brake calipers, comprising a base and a positioning mechanism arranged on the base, and a visual recognition mechanism and a shadowless lamp arranged on the positioning mechanism, wherein an upper shell is arranged on the top of the base, the positioning mechanism is rotatably arranged inside the upper shell, the visual recognition mechanism and the shadowless lamp are arranged above the interior of the upper shell, a conveyor belt is arranged above the interior of the base, a support tray is arranged above the conveyor belt, the conveyor belt is used to convey the support tray, the support tray is used to load the brake caliper, and a material ejection cylinder is also arranged inside the base below the positioning mechanism, the material ejection cylinder is used to push the support tray below the positioning mechanism upward to the outside of the positioning mechanism;

[0006] A driving mechanism is also provided inside the upper shell, and the driving mechanism is used to drive the positioning mechanism to rotate. The driving mechanism includes a reduction motor fixedly arranged inside the upper shell, and a fan gear is fixedly installed on the output end of the reduction motor. A large spur gear and a small spur gear are rotatably arranged above and below the fan gear inside the upper shell, wherein a first transmission shaft is installed on one side of the large spur gear, and a bump is installed on one side of the small spur gear through a second transmission shaft;

[0007] The positioning mechanism includes a rotating disk fixedly connected to the other end of the first transmission shaft, and two groups of clamps are symmetrically arranged inside the rotating disk, and the clamps correspond to the friction pads on the inner side of the brake caliper. The brake caliper will not be connected to the brake oil pipe during quality inspection, so the inner friction pad is fixed, and is expanded outwardly by the clamp and directly contacts the friction pads on the inner side of the brake caliper to achieve the purpose of fixing. The clamp includes a positioning disk slidably connected to both sides of the rotating disk near the edge, and a compression spring is provided between the inner side of the positioning disk and the rotating disk. The compression spring is used to always maintain the outward expansion force so that the two groups of positioning disks always fit the friction pads on the inner side of the brake caliper. The clamp also includes a sliding frame longitudinally slidably arranged inside the rotating disk, wherein a part of the sliding frame contacts the protrusion, and the sliding frame The other part is connected with an extrusion block, which is symmetrically provided with two groups. The clamp also includes an extrusion rod which is laterally slidably arranged inside the rotating disk, the extrusion rod is fitted on the inner side of the extrusion block, and the two ends of the extrusion rod are fixedly connected with a connecting frame, and the positioning plate is fixedly connected to the connecting frame; when not subject to external force, the positioning plate expands outward under the action of a compression spring to fix the brake caliper, and when the rotating disk drives the brake caliper to move to the upper position, the brake caliper is visually identified by a visual recognition mechanism and a shadowless lamp, and when the brake caliper moves to the position below the positioning mechanism, the small spur gear is driven by the reduction motor to drive the convex block to rotate, and the convex block squeezes the sliding frame, so that the extrusion block squeezes the extrusion rod, and then drives the positioning plate to move through the connecting frame, and the two groups of positioning plates shrink, which is convenient for replacing the brake caliper;

[0008] The visual recognition mechanism includes an outer fixed ring fixedly arranged on the upper part of the upper shell body, an inner rotating ring is rotatably arranged on the inner side of the outer fixed ring, a driving motor is fixedly installed on the outside of the outer fixed ring, and the driving motor is used to drive the inner rotating ring to rotate, and a visual recognition camera is installed on the inner side of the inner rotating ring. The horizontal position of the shadowless lamp is higher than the horizontal position of the visual recognition mechanism. The driving motor drives the inner rotating ring to rotate through the fill light of the shadowless lamp, so that the visual recognition camera on the inner side of the inner rotating ring captures the image data of the brake caliper from multiple angles.

[0009] Furthermore, a lifting plate is fixedly connected to the top of the lifting cylinder, and the top of the lifting plate corresponds to the bottom of the supporting tray directly below the positioning mechanism. When the lifting cylinder is extended, the supporting tray is lifted upward, so that the brake caliper moves to the bottom of the rotating disk, or supports the brake caliper that falls off from under the rotating disk.

[0010] Furthermore, two groups of conveyor belts are provided on the conveyor belt, the supporting tray is placed on the top of the two groups of conveyor belts, and the lifting cylinder is arranged between the two groups of conveyor belts.

[0011] Furthermore, the diameter of the large spur gear is the same as the diameter of the fan gear, and the outer tooth range of the fan gear is half of the circumference of the outer periphery of the fan gear, that is, when the outer teeth of the fan gear are meshed with the large spur gear, one rotation of the fan gear will first drive the large spur gear to rotate half a circle, and after the large spur gear stops rotating, it will drive the small spur gear to rotate.

[0012] Furthermore, the diameter of the small spur gear is half of the diameter of the sector gear, and when the sector gear is meshed with the small spur gear, it drives the small spur gear to rotate one circle, and the small spur gear drives the protrusion to rotate one circle through the second transmission shaft.

[0013] Furthermore, first movable grooves corresponding to the positioning disk are arranged on both sides of the rotating disk, second movable grooves are arranged on both sides of the rotating disk, a sliding groove is arranged inside the rotating disk, and a limiting groove is arranged on one side of the rotating disk close to the driving mechanism.

[0014] Furthermore, the sliding frame includes a movable rod slidably connected to the inside of the sliding groove, and a limit plate is installed on the top of the movable rod through a slider, and the limit plate extends outward from the limit groove, and the outer side of the limit plate contacts the protrusion. When the protrusion rotates, the limit plate will be pushed upward, and then the two sets of positioning plates will be contracted through the extrusion block and the extrusion rod.

[0015] Furthermore, the cross-sections of the extrusion block and the extrusion rod are right triangles, and the extrusion block squeezes the extrusion rods when moving upward, so that the two groups of extrusion rods are close to each other.

[0016] Furthermore, the positioning mechanism also includes a stabilizing block fixedly mounted on the other end of the connecting frame, the stabilizing block is slidably arranged inside the second movable groove, and a compression spring is also arranged between the inner side of the stabilizing block and the rotating disk.

[0017] Furthermore, the extrusion rod is arranged in the middle part of the connecting frame, and the positioning plate and the stabilizing block form a stable symmetrical structure to prevent the edge of the positioning plate from being stuck in the first movable groove and unable to move.

[0018] Compared with the prior art, the present invention has the following beneficial effects:

[0019] The present invention provides an appearance defect detection device for an automobile brake caliper. The brake caliper is fixed to the outer edge of a rotating disk under the expansion action of a positioning disk, and the rotating disk is driven to rotate by the action of a reduction motor, a fan gear and a large spur gear. When the brake caliper rotates to the upper side, appearance detection is performed through a visual recognition mechanism and a shadowless lamp. After the detection is completed, when the rotating disk moves the brake caliper to the lower position of the rotating disk, the fan gear meshes with the small spur gear, and the fan gear drives the small spur gear and then drives the protrusion to rotate half a circle. The protrusion on the protrusion pushes up the sliding frame, and under the action of the extrusion block and the extrusion rod, the two groups of positioning disks are retracted inwardly. Under the coordinated action of the conveyor belt and the ejection cylinder, the brake caliper is replaced, and then the fan gear drives the small spur gear to rotate half a circle again, the sliding frame, the extrusion block, the extrusion rod and the positioning disk are reset, and the positioning disk is unfolded to continue to clamp the brake caliper, and the detection is cyclically performed, thereby realizing automatic loading and unloading, automatic positioning and automatic detection, and the detection efficiency is high. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0021] Figure 2 It is a structural breakdown diagram of the present invention as a whole;

[0022] Figure 3 It is a partial structural schematic diagram of the present invention;

[0023] Figure 4 It is a schematic diagram of the structure of the ejecting cylinder, the supporting tray, the positioning mechanism, the driving mechanism, the visual recognition mechanism and the shadowless lamp of the present invention;

[0024] Figure 5 It is a schematic diagram of the positioning mechanism and driving mechanism structure of the present invention;

[0025] Figure 6 It is a structural split diagram of the positioning mechanism and the driving mechanism of the present invention;

[0026] Figure 7 It is an exploded view of the positioning mechanism and the driving mechanism of the present invention;

[0027] Figure 8 It is a partial structural schematic diagram of the driving mechanism of the present invention.

[0028] In the figure: 1. base; 2. upper shell; 3. conveyor belt; 4. ejector cylinder; 41. ejector plate; 5. tray; 6. positioning mechanism; 61. rotating disk; 611. first movable groove; 612. second movable groove; 613. sliding groove; 614. limiting groove; 62. sliding frame; 621. movable rod; 622. slider; 623. limiting plate; 63. extrusion block; 64. extrusion rod; 641. connecting frame; 65. positioning disk; 66. stabilizing block; 67. compression spring; 7. driving mechanism; 71. reduction motor; 72. sector gear; 73. large spur gear; 731. first transmission shaft; 74. small spur gear; 741. second transmission shaft; 75. bump; 8. visual recognition mechanism; 81. outer fixing ring; 82. inner rotating ring; 83. visual recognition camera; 84. driving motor; 9. shadowless lamp. DETAILED DESCRIPTION

[0029] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0030] In order to solve the technical problem that the existing visual inspection device is not efficient enough when performing large-scale inspection on brake calipers, such as Figure 1-Figure 8 As shown, the following preferred technical solutions are provided:

[0031] like Figure 1-2 As shown, a device for detecting appearance defects of automobile brake calipers comprises a base 1 and a positioning mechanism 6 arranged on the base 1, and a visual recognition mechanism 8 and a shadowless lamp 9 arranged on the positioning mechanism 6. An upper shell 2 is arranged on the top of the base 1, and the positioning mechanism 6 is rotatably arranged inside the upper shell 2. The visual recognition mechanism 8 and the shadowless lamp 9 are arranged above the inside of the upper shell 2. A conveyor belt 3 is arranged above the inside of the base 1, and a receiving tray 5 is arranged above the conveyor belt 3. The conveyor belt 3 is used to convey the receiving tray 5, and the receiving tray 5 is used to load the brake caliper. A material ejection cylinder 4 is also arranged inside the base 1 below the positioning mechanism 6, and the material ejection cylinder 4 is used to push the receiving tray 5 below the positioning mechanism 6 upward to the outside of the positioning mechanism 6.

[0032] like Figure 5-7As shown, a driving mechanism 7 is further provided inside the upper shell 2, and the driving mechanism 7 is used to drive the positioning mechanism 6 to rotate. The driving mechanism 7 includes a reduction motor 71 fixedly provided inside the upper shell 2, and a sector gear 72 is fixedly installed on the output end of the reduction motor 71. A large spur gear 73 and a small spur gear 74 are rotatably provided above and below the sector gear 72 inside the upper shell 2, wherein a first transmission shaft 731 is installed on one side of the large spur gear 73, and a bump 75 is installed on one side of the small spur gear 74 through a second transmission shaft 741;

[0033] like Figure 6-7 As shown, the positioning mechanism 6 includes a rotating disk 61 fixedly connected to the other end of the first transmission shaft 731, and two groups of clamps are symmetrically arranged inside the rotating disk 61. The clamps correspond to the friction plates on the inner side of the brake caliper. The brake caliper will not be connected to the brake oil pipe during quality inspection, so the friction plates on the inner side are fixed, and are expanded outwardly through the clamps and directly contact the friction plates on the inner side of the brake caliper to achieve the purpose of fixing. The clamps include positioning disks 65 slidably connected to the edges of both sides of the rotating disk 61, and a compression spring 67 is arranged between the inner side of the positioning disk 65 and the rotating disk 61. The compression spring 67 is used to always maintain the outward expansion force so that the two groups of positioning disks 65 always fit the friction plates on the inner side of the brake caliper. The clamp also includes a sliding frame 62 longitudinally slidably arranged inside the rotating disk 61, wherein a part of the sliding frame 62 is in contact with the protrusion 75, and the other part of the sliding frame 62 is connected to the extrusion block 6 3. The extrusion block 63 is symmetrically provided with two groups, and the clamp also includes an extrusion rod 64 which is slidably arranged inside the rotating disk 61 in a transverse direction. The extrusion rod 64 is attached to the inner side of the extrusion block 63. The two ends of the extrusion rod 64 are fixedly connected with a connecting frame 641, and the positioning disk 65 is fixedly connected to the connecting frame 641; when not subjected to external force, the positioning disk 65 expands outward under the action of the compression spring 67 to fix the brake caliper. When the rotating disk 61 drives the brake caliper to move to the upper position, the brake caliper is visually identified by the visual recognition mechanism 8 and the shadowless lamp 9. When the brake caliper moves to the position below the positioning mechanism 6, the small spur gear 74 is driven by the reduction motor 71 to drive the protrusion 75 to rotate, and the protrusion 75 squeezes the sliding frame 62, so that the extrusion block 63 squeezes the extrusion rod 64, and then drives the positioning disk 65 to move through the connecting frame 641, and the two groups of positioning disks 65 shrink, which is convenient for replacing the brake caliper;

[0034] like Figure 4As shown, the visual recognition mechanism 8 includes an outer fixed ring 81 fixedly arranged on the upper part of the upper shell body 2, an inner rotating ring 82 is rotatably arranged inside the outer fixed ring 81, a driving motor 84 is fixedly installed on the outside of the outer fixed ring 81, and the driving motor 84 is used to drive the inner rotating ring 82 to rotate, and a visual recognition camera 83 is installed on the inner side of the inner rotating ring 82. The horizontal position of the shadowless lamp 9 is higher than the horizontal position of the visual recognition mechanism 8. The driving motor 84 drives the inner rotating ring 82 to rotate through the fill light of the shadowless lamp 9, so that the visual recognition camera 83 on the inner side of the inner rotating ring 82 captures the image data of the brake caliper at multiple angles.

[0035] like Figure 4 As shown, a ejection plate 41 is fixedly connected to the top of the ejection cylinder 4, and the top of the ejection plate 41 corresponds to the bottom of the supporting tray 5 directly below the positioning mechanism 6. When the ejection cylinder 4 is extended, the supporting tray 5 is lifted upward, so that the brake caliper moves to the bottom of the rotating disk 61, or supports the brake caliper that falls off from under the rotating disk 61.

[0036] like Figure 3 As shown, there are two groups of conveyor belts on the conveyor belt 3, the support tray 5 is placed on the top of the two groups of conveyor belts, and the lifting cylinder 4 is arranged between the two groups of conveyor belts.

[0037] like Figure 7-8 As shown, the diameter of the large spur gear 73 is the same as the diameter of the sector gear 72, and the outer tooth range of the sector gear 72 is half of the outer circumference of the sector gear 72, that is, when the outer teeth of the sector gear 72 are engaged with the large spur gear 73, the sector gear 72 rotates one circle and first drives the large spur gear 73 to rotate half a circle, and then drives the small spur gear 74 to rotate after the large spur gear 73 stops rotating.

[0038] like Figure 7-8 As shown, the diameter of the small spur gear 74 is half of the diameter of the sector gear 72. When the sector gear 72 is meshed with the small spur gear 74, the small spur gear 74 is driven to rotate one circle. The small spur gear 74 drives the protrusion 75 to rotate one circle through the second transmission shaft 741.

[0039] like Figure 6 As shown, first movable grooves 611 corresponding to the positioning plate 65 are provided on both sides of the rotating disk 61, second movable grooves 612 are also provided on both sides of the rotating disk 61, a sliding groove 613 is provided inside the rotating disk 61, and a limiting groove 614 is provided on the side of the rotating disk 61 close to the driving mechanism 7.

[0040] like Figure 7As shown, the sliding frame 62 includes a movable rod 621 slidably connected to the inside of the sliding groove 613, and a limiting plate 623 is installed on the top of the movable rod 621 through a slider 622, and the limiting plate 623 extends outward from the limiting groove 614, and the outer side of the limiting plate 623 contacts the protrusion 75. When the protrusion 75 rotates, the limiting plate 623 is pushed upward, and then the two groups of positioning plates 65 are contracted through the extrusion block 63 and the extrusion rod 64.

[0041] like Figure 7 As shown, the cross-sections of the extrusion block 63 and the extrusion rod 64 are right triangles. When the extrusion block 63 moves upward, it squeezes the extrusion rod 64, so that the two groups of extrusion rods 64 are close to each other.

[0042] like Figure 7 As shown, the positioning mechanism 6 also includes a stabilizing block 66 fixedly mounted on the other end of the connecting frame 641 . The stabilizing block 66 is slidably disposed inside the second movable groove 612 . A compression spring 67 is also disposed between the inner side of the stabilizing block 66 and the rotating disk 61 .

[0043] like Figure 7 As shown, the extrusion rod 64 is arranged in the middle part of the connecting frame 641, and the positioning plate 65 and the stabilizing block 66 form a stable symmetrical structure to prevent the edge of the positioning plate 65 from being stuck in the first movable groove 611 and unable to move.

[0044] Working principle: The brake caliper is fixed to the outer edge of the rotating disk 61 under the expansion effect of the positioning disk 65, and the rotating disk 61 is driven to rotate by the action of the reduction motor 71, the fan gear 72 and the large spur gear 73. When the brake caliper rotates to the upper side, the visual recognition mechanism 8 and the shadowless lamp 9 are used for appearance inspection. After the inspection is completed, when the rotating disk 61 moves the brake caliper to the lower position of the rotating disk 61, the fan gear 72 meshes with the small spur gear 74. When the fan gear 72 drives the small spur gear 74 and then drives the protrusion 75 to rotate half a circle, the protrusion on the protrusion 75 pushes the sliding frame 62 upward, and squeezes Under the action of the block 63 and the extrusion rod 64, the two groups of positioning plates 65 are retracted inward, and then the brake caliper falls on the supporting tray 5. Then, with the cooperation of the conveyor belt 3 and the ejection cylinder 4, the new brake caliper is transported to the lower edge of the rotating disk 61, and the small spur gear 74 is driven by the fan gear 72 to rotate another half circle. At this time, the protrusion on the protrusion 75 is facing downward, the sliding frame 62, the extrusion block 63, the extrusion rod 64 and the positioning plate 65 are reset, and the positioning plate 65 is expanded to continue to clamp the brake caliper. Then the fan gear 72 engages the large spur gear 73 to rotate, and the appearance inspection is continued through the visual recognition mechanism 8 and the shadowless lamp 9.

[0045] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0046] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A vehicle brake caliper appearance defect detection device, comprising a base (1), a positioning mechanism (6) arranged on the base (1), and a visual recognition mechanism (8) and a shadowless lamp (9) arranged on the positioning mechanism (6), characterized in that: An upper shell (2) is arranged on the top of the base (1); the positioning mechanism (6) is rotatably arranged inside the upper shell (2); a visual recognition mechanism (8) and a shadowless lamp (9) are arranged above the inside of the upper shell (2); a conveyor belt (3) is arranged above the inside of the base (1); a support tray (5) is arranged above the conveyor belt (3); the conveyor belt (3) is used to transport the support tray (5); the support tray (5) is used to load the brake caliper; a material-lifting cylinder (4) is also arranged inside the base (1) below the positioning mechanism (6); the material-lifting cylinder (4) is used to push the support tray (5) below the positioning mechanism (6) upward to the outside of the positioning mechanism (6); A driving mechanism (7) is also provided inside the upper shell (2), and the driving mechanism (7) is used to drive the positioning mechanism (6) to rotate. The driving mechanism (7) comprises a reduction motor (71) fixedly arranged inside the upper shell (2), and a sector gear (72) is fixedly installed at the output end of the reduction motor (71). A large spur gear (73) and a small spur gear (74) are rotatably provided inside the upper shell (2) above and below the sector gear (72), respectively, wherein a first transmission shaft (731) is installed on one side of the large spur gear (73), and a bump (75) is installed on one side of the small spur gear (74) via a second transmission shaft (741); The positioning mechanism (6) comprises a rotating disk (61) fixedly connected to the other end of the first transmission shaft (731), two groups of clamps are symmetrically arranged inside the rotating disk (61), and the clamps correspond to the friction plates on the inner side of the brake caliper. The clamps comprise positioning disks (65) slidably connected to the edges of both sides of the rotating disk (61), and a compression spring (67) is arranged between the inner side of the positioning disk (65) and the rotating disk (61), and the compression spring (67) is used to always maintain an outward expansion force so that the two groups of positioning disks (65) always fit the friction plates on the inner side of the brake caliper. The clamp further comprises a sliding frame (62) longitudinally slidably arranged inside the rotating disk (61), wherein a portion of the sliding frame (62) contacts the protrusion (75), and another portion of the sliding frame (62) is connected to an extrusion block (63), and the extrusion block (63) is symmetrically provided with two groups. The clamp further comprises an extrusion rod (64) transversely slidably arranged inside the rotating disk (61), and the extrusion rod (64) is attached to the inner side of the extrusion block (63), and the two ends of the extrusion rod (64) are fixedly connected to a connecting frame (641), and the positioning disk (65) is fixedly connected to the connecting frame (641); The visual recognition mechanism (8) comprises an outer fixed ring (81) fixedly arranged above the interior of the upper shell (2); an inner rotating ring (82) is rotatably arranged inside the outer fixed ring (81); a driving motor (84) is fixedly installed outside the outer fixed ring (81), and the driving motor (84) is used to drive the inner rotating ring (82) to rotate; a visual recognition camera (83) is installed inside the inner rotating ring (82); and the horizontal position of the shadowless lamp (9) is higher than the horizontal position of the visual recognition mechanism (8); The rotating disk (61) is provided with first movable grooves (611) corresponding to the positioning disk (65) on both sides, the rotating disk (61) is also provided with second movable grooves (612) on both sides, the rotating disk (61) is provided with a sliding groove (613) inside, and a limiting groove (614) is provided on one side of the rotating disk (61) close to the driving mechanism (7); The sliding frame (62) comprises a movable rod (621) slidably connected inside the sliding groove (613), a limiting plate (623) is installed on the top of the movable rod (621) through a sliding block (622), and the limiting plate (623) extends outward from the limiting groove (614), and the outer side of the limiting plate (623) is in contact with the protrusion (75); The cross-sections of the extrusion block (63) and the extrusion rod (64) are right triangles; The positioning mechanism (6) further comprises a stabilizing block (66) fixedly mounted on the other end of the connecting frame (641); the stabilizing block (66) is slidably disposed inside the second movable groove (612); and a compression spring (67) is also disposed between the inner side of the stabilizing block (66) and the rotating disk (61); The extrusion rod (64) is arranged in the middle part of the connecting frame (641), and the positioning plate (65) and the stabilizing block (66) form a stable symmetrical structure.

2. The appearance defect detection device for automobile brake calipers according to claim 1, characterized in that: A lifting plate (41) is fixedly connected to the top of the lifting cylinder (4), and the top of the lifting plate (41) corresponds to the bottom of the supporting tray (5) directly below the positioning mechanism (6). When the lifting cylinder (4) is extended, the supporting tray (5) is lifted upward, so that the brake caliper moves to the bottom of the rotating disk (61), or supports the brake caliper that falls off from the bottom of the rotating disk (61).

3. The appearance defect detection device for automobile brake calipers according to claim 1, characterized in that: The conveyor belt (3) is provided with two groups of conveyor belts, the support tray (5) is placed on the top of the two groups of conveyor belts, and the lifting cylinder (4) is arranged between the two groups of conveyor belts.

4. The appearance defect detection device for automobile brake calipers according to claim 1, characterized in that: The diameter of the large spur gear (73) is the same as the diameter of the sector gear (72), and the outer tooth range of the sector gear (72) is half of the outer circumference of the sector gear (72).

5. The appearance defect detection device for automobile brake calipers according to claim 4, characterized in that: The diameter of the small spur gear (74) is half the diameter of the sector gear (72).

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