Tire rim surface defect detection device
The automatic fixing and position adjustment of the tire rim is achieved through the electric push rod driven fixing mechanism and displacement threaded column design. This solves the problems of instability and insufficient adaptability of manual fixing in existing detection devices, improves the stability and versatility of detection, and reduces cost and complexity.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-04
- Publication Date
- 2026-03-03
AI Technical Summary
Existing tire rim surface defect detection devices require manual hand-holding and fixation, which relies on human resources, leading to increased labor costs and unstable operation. Furthermore, they cannot adapt to different tire rim specifications, limiting the versatility and efficiency of the detection devices.
The fixing mechanism, driven by an electric push rod, automatically fixes the tire rim through a combination of connecting ring, rotating rod, bearing, push block and rubber pad. The design of displacement threaded column and light shield can adapt to the detection of tire rims of different sizes.
It improves the stability and accuracy of detection, reduces the instability caused by manual operation, enhances the versatility of the device, reduces equipment procurement costs and the complexity of the detection process, and improves detection efficiency.
Smart Images
Figure CN223966563U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of nondestructive testing technology, and in particular to a device for detecting surface defects in tire rims. Background Technology
[0002] In modern industrial production, non-destructive testing (NDT) technology plays a crucial role. For tire rims, a critical automotive component, the quality requirements are extremely high, especially regarding surface quality. Traditional inspection methods often have limitations. For example, while visual inspection is simple and direct, it's difficult for the human eye to accurately identify minute surface cracks and shallow scratches. Furthermore, inspection efficiency is low and easily affected by subjective factors of the inspector, such as fatigue and differences in vision. Contact measurement methods, such as using calipers to check rim dimensional deviations, are ineffective at detecting surface quality defects, especially those hidden in textures or complex shapes. Moreover, contact inspection may cause some degree of scratching to the rim surface. Therefore, a tire rim surface defect detection device is particularly needed.
[0003] However, existing testing devices often require manual hand-holding to fix the tire rim during the testing process. This manual fixing method not only relies heavily on manpower, leading to increased labor costs, but also makes it difficult to guarantee long-term stability and accuracy. In addition, although some testing devices are equipped with mechanical fixing structures, these devices often only work for a specific type of tire rim due to inherent design limitations, and cannot adaptively adjust to different tire rim sizes. This means that these testing devices cannot meet diverse testing needs when faced with multiple sets of tire rims of different specifications, severely limiting the versatility and efficiency of the testing devices, and increasing the equipment procurement costs and complexity of the testing process for enterprises. Utility Model Content
[0004] The purpose of this invention is to provide a tire rim surface defect detection device to address the problems mentioned in the background section. Existing detection devices often require manual hand-holding to fix the tire rim during the detection process. This manual fixing method not only heavily relies on manpower, leading to increased labor costs, but also makes it difficult to guarantee long-term stability and accuracy. Furthermore, although some detection devices are equipped with mechanical fixing structures, these devices, due to inherent design limitations, often only work for a specific type of tire rim and cannot adaptively adjust to different tire rim sizes. This results in these detection devices being unable to meet diverse detection needs when faced with multiple sets of tire rims of different specifications, severely limiting the versatility and efficiency of the detection device, and increasing the equipment procurement costs and complexity of the detection process for enterprises.
[0005] To achieve the above objectives, this utility model provides the following technical solution: a tire rim surface defect detection device, comprising a support foot, a base fixedly connected to the upper surface of the support foot, a displacement groove fixedly connected to the upper surface of the base, a displacement threaded column fixedly connected to one side surface of the displacement groove, a knob rotatably connected to one side surface of the displacement groove, a displacement block slidably connected to one side surface of the displacement threaded column, a connecting column fixedly connected to the upper surface of the displacement block, a light shield fixedly connected to the upper surface of the connecting column, a detector fixedly connected to the inner surface of the light shield, a telescopic column fixedly connected to the upper surface of the base, and a fixing mechanism fixedly connected to the upper surface of the telescopic column.
[0006] The fixing mechanism includes a fixing block, an electric push rod, a connecting ring, a rotating rod, a bearing, a connecting plate, a pushing block, a rubber pad, and a limiting rod. The fixing block is fixedly connected to the upper surface of the telescopic column. The electric push rod is fixedly connected to one side surface of the fixing block. The connecting ring is fixedly connected to one side surface of the electric push rod. The rotating rod is rotatably connected to one side surface of the connecting ring. The bearing is fixedly connected to one side surface of the rotating rod. The connecting plate is rotatably connected to one side surface of the bearing. The pushing block is rotatably connected to one side surface of the rotating rod. The rubber pad is fixedly connected to one side surface of the pushing block. The limiting rod is fixedly connected to one side surface of the pushing block.
[0007] Preferably, four sets of the support feet are symmetrically arranged with respect to the vertical line of the base, and two sets of the displacement threaded columns are symmetrically arranged on one side surface of the displacement groove.
[0008] Preferably, the outer side of the knob has multiple sets of anti-slip textures, and the displacement block can be controlled to slide on the displacement threaded column by rotating the knob.
[0009] Preferably, the light shield can effectively block external light and prevent light interference when the detector is performing the test. The telescopic column can drive the fixing mechanism to move up and down within a certain range to meet the device's requirements for testing tire rims of different sizes.
[0010] Preferably, the fixing mechanism has two sets fixedly connected to the upper surface of the base, which respectively fix the left and right sides of the tire rim. The connecting ring is fixedly connected to the cylinder of the electric push rod, and the connecting plate is fixedly connected to the push plate of the electric push rod.
[0011] Preferably, the rotating rod, bearing, push block, and rubber pad are arranged symmetrically in four groups around the central axis of the connecting plate. When the push rod of the electric push rod moves backward, the connecting ring and the connecting plate move closer to each other, which increases the angle between the rotating rod and the connecting plate, and increases the radius of the circle formed by the four push blocks, thereby achieving clamping of the tire rim.
[0012] Preferably, two sets of limiting rods are arranged in parallel opposite directions between the upper and lower pushing blocks, and two sets are also arranged in parallel opposite directions between the left and right pushing blocks, and the rubber pad is made of silicone rubber.
[0013] Compared with the prior art, the beneficial effects of this utility model are as follows: This tire rim surface defect detection device, through the setting of the fixing mechanism, when the tire rim needs to be inspected, the electric push rod in the fixing mechanism is activated, and the push rod of the electric push rod moves backward. Since the connecting ring is fixedly connected to the cylinder of the electric push rod, and the connecting plate is fixedly connected to the push plate of the electric push rod, as the push rod moves, the connecting ring and the connecting plate move closer to each other, which makes the angle between the rotating rod and the connecting plate larger. The rotating rod rotates smoothly under the action of the bearing, thereby driving the push block to move. Since the rotating rod, bearing, push block and rubber pad are symmetrically arranged in four sets about the central axis of the connecting plate, the device has the following advantages: Four pushing blocks move outwards simultaneously, increasing the radius of the enclosed circle until the rubber pad makes tight contact with the tire rim, thus clamping the tire rim. Two sets of limit rods are parallel to each other between the upper and lower pushing blocks, and two sets are also parallel to each other between the left and right pushing blocks, ensuring the stability and accuracy of the pushing block movement and guaranteeing the rim is securely clamped. A displacement groove is located above the base of the device. A displacement threaded column is fixed to one side of the groove, and a knob is rotatably connected to the other side. A displacement block is slidably connected to the displacement threaded column. Rotating the knob, with multiple anti-slip grooves on its outer side for easy operation, causes the displacement threaded column to rotate, thereby... The displacement block slides and translates on the displacement threaded column. A light shield is connected above the displacement block via a connecting column. The detector is fixed inside the light shield. Simultaneously, a telescopic column above the base can move the fixing mechanism up and down within a certain range. By moving the displacement block and the telescopic column, the position of the detector relative to the tire rim can be adjusted for comprehensive inspection of tire rims of different sizes. During inspection, the light shield effectively blocks external light, preventing light interference with the detector's operation. This device automatically fixes the tire rim using a fixing mechanism driven by an electric push rod, eliminating the need for manual handling and significantly improving inspection efficiency compared to traditional methods. The fixed-position method reduces instability caused by human fatigue and improper operation, ensuring the stability of the testing process and the accuracy of the results. This provides a reliable guarantee for long-term stable testing work. The fixing mechanism can adapt to tire rims of different sizes, overcoming the limitation of some existing testing devices that can only handle a single type of rim. This allows the device to meet the testing needs of various tire rim specifications, improving its versatility. Enterprises do not need to equip themselves with multiple testing devices for different rim sizes, reducing equipment procurement costs and the complexity of the testing process, effectively improving the economic benefits and overall efficiency of the testing work. Attached Figure Description
[0014] Figure 1 This is a side view of the appearance structure of this utility model;
[0015] Figure 2 This is a schematic diagram of the structure in which the base, displacement groove, and detector of this utility model cooperate with each other;
[0016] Figure 3 This is a schematic diagram of the fixing mechanism of this utility model;
[0017] Figure 4 This is a schematic diagram of the interaction structure of the push block, the limiting rod, and the rotating rod of this utility model.
[0018] In the diagram: 1. Support foot; 2. Base; 3. Displacement groove; 4. Displacement threaded column; 5. Knob; 6. Displacement block; 7. Connecting column; 8. Sunshade; 9. Detector; 10. Telescopic column; 11. Fixing mechanism; 1101. Fixing block; 1102. Electric push rod; 1103. Connecting ring; 1104. Rotating rod; 1105. Bearing; 1106. Connecting plate; 1107. Push block; 1108. Rubber pad; 1109. Limiting rod. Detailed Implementation
[0019] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.
[0020] Please see Figure 1-4 This utility model provides a technical solution: a tire rim surface defect detection device, including a support foot 1, a base 2 fixedly connected to the upper surface of the support foot 1, a displacement groove 3 fixedly connected to the upper surface of the base 2, a displacement threaded column 4 fixedly connected to one side surface of the displacement groove 3, a knob 5 rotatably connected to one side surface of the displacement groove 3, a displacement block 6 slidably connected to one side surface of the displacement threaded column 4, a connecting column 7 fixedly connected to the upper surface of the displacement block 6, a light shield 8 fixedly connected to the upper surface of the connecting column 7, a detector 9 fixedly connected to the inner surface of the light shield 8, a telescopic column 10 fixedly connected to the upper surface of the base 2, and a fixing mechanism 11 fixedly connected to the upper surface of the telescopic column 10.
[0021] The fixing mechanism 11 includes a fixing block 1101, an electric push rod 1102, a connecting ring 1103, a rotating rod 1104, a bearing 1105, a connecting plate 1106, a pushing block 1107, a rubber pad 1108, and a limiting rod 1109. The fixing block 1101 is fixedly connected to the upper surface of the telescopic column 10. The electric push rod 1102 is fixedly connected to one side surface of the fixing block 1101. The connecting ring 1103 is fixedly connected to one side surface of the electric push rod 1102. The rotating rod 1104 is rotatably connected to one side surface of the connecting ring 1103. A fixed connection is made to one side surface of the rotating rod 1104. The device includes a bearing 1105, a connecting plate 1106 rotatably connected to one side of the bearing 1105, a pushing block 1107 rotatably connected to one side of the rotating rod 1104, a rubber pad 1108 fixedly connected to one side of the pushing block 1107, and a limit rod 1109 fixedly connected to one side of the pushing block 1107. Through the arrangement of the fixing block 1101, electric push rod 1102, connecting ring 1103, rotating rod 1104, bearing 1105, connecting plate 1106, pushing block 1107, rubber pad 1108, and limit rod 1109, the fixing mechanism 11 is activated during use. The electric push rod 1102 moves backward. Since the connecting ring 1103 is fixedly connected to the cylinder of the electric push rod 1102, and the connecting plate 1106 is fixedly connected to the push plate of the electric push rod 1102, as the push rod moves, the connecting ring 1103 and the connecting plate 1106 move closer together. This increases the angle between the rotating rod 1104 and the connecting plate 1106. The rotating rod 1104 rotates smoothly under the action of the bearing 1105, thereby driving the push block 1107 to move. Since the rotating rod 1104, bearing 1105, push block 1107, and rubber pad 1108 are symmetrically arranged in four groups around the central axis of the connecting plate 1106, the four push blocks 1107 move outward simultaneously, increasing the radius of the circle until the rubber pad 1108 is in close contact with the tire rim, achieving clamping of the tire rim. Furthermore, the limiting rod 1109... Two sets of parallel opposing push blocks 1107 are arranged between the upper and lower push blocks 1107, and two sets of parallel opposing push blocks 1107 are also arranged between the left and right push blocks 1107. This ensures the stability and accuracy of the movement of the push blocks 1107 and ensures that the steel ring is firmly clamped. A displacement groove 3 is provided above the base 2 of the device. A displacement threaded column 4 is fixed to one side of the displacement groove 3, and a knob 5 is rotatably connected to the other side. A displacement block 6 is slidably connected to the displacement threaded column 4. Rotating the knob 5, which has multiple anti-slip textures on its outer side for easy operation, causes the displacement threaded column 4 to rotate, thereby allowing the displacement block 6 to slide horizontally on the displacement threaded column 4. A light shield 8 is connected above the displacement block 6 via a connecting column 7. A detector 9 is fixed inside the light shield 8.The telescopic column 10 above the base 2 can drive the fixing mechanism 11 to move up and down within a certain range. Through the translation of the displacement block 6 and the up-and-down movement of the telescopic column 10, the position of the detector 9 relative to the tire rim can be adjusted to comprehensively inspect tire rims of different sizes. During the inspection process, the light shield 8 effectively blocks external light, preventing light interference with the detector 9's operation. This device automatically fixes the tire rim via the fixing mechanism 11 driven by the electric push rod 1102, eliminating the need for manual handling and greatly improving inspection efficiency. Compared to traditional manual fixing methods, it reduces instability caused by human fatigue, improper operation, etc., ensuring the stability of the inspection process and the accuracy of the results, providing a reliable guarantee for long-term stable inspection work. The fixing mechanism 11... This device can adapt to tire rims of different sizes, overcoming the limitation of some existing testing devices that can only handle a single type of rim. This allows it to meet the testing needs of various tire rim sizes, improving its versatility. Companies no longer need to equip themselves with multiple testing devices for different rim sizes, reducing equipment procurement costs and the complexity of the testing process, effectively improving the company's economic benefits and the overall efficiency of the testing work.
[0022] Furthermore, four sets of support feet 1 are symmetrically arranged with respect to the vertical line of the base 2, and two sets of displacement threaded columns 4 are symmetrically arranged on one side of the displacement groove 3. Through the arrangement of support feet 1 and displacement threaded columns 4, the four sets of support feet 1 are symmetrically arranged with respect to the vertical line of the base 2 during use, so that the device is placed stably. The two sets of displacement threaded columns 4 are symmetrically arranged on one side of the displacement groove 3. Together with the knob 5, the position of the detector 9 can be precisely adjusted. The combination of the two ensures smooth testing, improves testing efficiency and accuracy, and is beneficial for testing steel rings of different sizes.
[0023] Furthermore, the outer side of the knob 5 has multiple sets of anti-slip textures, and the displacement block 6 can be controlled to slide on the displacement threaded column 4 by rotating the knob 5 to drive the displacement threaded column 4. With the knob 5 and displacement block 6, the multiple sets of anti-slip textures on the outer side of the knob 5 facilitate operation during use. By rotating the knob 5, the displacement threaded column 4 can be rotated, thereby controlling the displacement block 6 to slide on the displacement threaded column 4. This allows for flexible and accurate adjustment of the detector position, which is beneficial for tire rim inspection.
[0024] Furthermore, the light shield 8 can effectively block external light and prevent light interference during the detection of the detector 9. The telescopic column 10 can drive the fixing mechanism 11 to move up and down within a certain range to meet the device's detection requirements for tire rims of different sizes. Through the setting of the light shield 8 and the telescopic column 10, during use, the light shield 8 effectively blocks external light from interfering with the detector 9, and the telescopic column 10 drives the fixing mechanism 11 to move up and down, which can meet the detection requirements for tire rims of different sizes and ensure the accuracy and applicability of the detection.
[0025] Furthermore, the fixing mechanism 11 has two sets fixedly connected to the upper surface of the base 2, which respectively fix the left and right sides of the tire steel rim. The connecting ring 1103 is fixedly connected to the cylinder of the electric push rod 1102, and the connecting plate 1106 is fixedly connected to the push plate of the electric push rod 1102. With the setting of the fixing mechanism 11, there are two sets on the base 2 during use, which can fix the tire steel rim from the left and right sides. The connecting ring 1103 is fixedly connected to the cylinder of the electric push rod 1102, and the connecting plate 1106 is fixedly connected to the push plate, which is conducive to achieving stable clamping and adapting to the detection of tire steel rims of different sizes.
[0026] Furthermore, four sets of rotating rods 1104, bearings 1105, pushing blocks 1107, and rubber pads 1108 are symmetrically arranged around the central axis of the connecting plate 1106. When the push rod of the electric push rod 1102 moves backward, the connecting ring 1103 and the connecting plate 1106 move closer to each other, causing the angle between the rotating rod 1104 and the connecting plate 1106 to increase. This results in an increase in the radius of the circle formed by the four pushing blocks 1107, thus achieving clamping of the tire rim. Through the arrangement of rotating rods 1104, bearings 1105, pushing blocks 1107, rubber pads 1108, and connecting plate 1106, during use, the electric push rod 1102 pushes the relevant components together, increasing the radius of the circle formed by the four pushing blocks 1107, which can stably clamp the tire rim and adapt to rims of different sizes.
[0027] Furthermore, two sets of limit rods 1109 are arranged parallel to each other between the upper and lower push blocks 1107, and similarly, two sets are arranged parallel to each other between the left and right push blocks 1107. The rubber pads 1108 are made of silicone rubber. With the setting of limit rods 1109 and rubber pads 1108, during use, the limit rods 1109 are arranged parallel to each other between the push blocks 1107 to ensure stable and accurate movement of the push blocks. The silicone rubber pads 1108 can prevent scratching the steel ring during clamping, ensuring the quality of the steel ring and smooth testing.
[0028] Working Principle: This tire rim surface defect detection device, through the setting of the fixing mechanism 11, when the tire rim needs to be inspected, activates the electric push rod 1102 in the fixing mechanism 11. The push rod of the electric push rod 1102 moves backward. Since the connecting ring 1103 is fixedly connected to the cylinder of the electric push rod 1102, and the connecting plate 1106 is fixedly connected to the push plate of the electric push rod 1102, as the push rod moves, the connecting ring 1103 and the connecting plate 1106 move closer to each other. This makes the angle between the rotating rod 1104 and the connecting plate 1106 larger. The rotating rod 1104 rotates smoothly under the action of the bearing 1105, thereby driving the push block 1107 to move. Since the rotating rod 1104, bearing 1105, push block 1107 and rubber pad 1108 are symmetrically arranged in four groups around the central axis of the connecting plate 1106, the four push blocks 1107... Simultaneously moving outwards, the radius of the enclosed circle increases until the rubber pad 1108 is in close contact with the tire rim, achieving clamping of the tire rim. Furthermore, two sets of limit rods 1109 are arranged parallel to each other between the upper and lower push blocks 1107, and two sets are also arranged parallel to each other between the left and right push blocks 1107, ensuring the stability and accuracy of the push block 1107's movement and ensuring the rim is securely clamped. A displacement groove 3 is provided above the base 2 of the device. A displacement threaded column 4 is fixed to one side of the displacement groove 3, and a knob 5 is rotatably connected to the other side. A displacement block 6 is slidably connected to the displacement threaded column 4. Rotating the knob 5, which has multiple anti-slip textures on its outer side for easy operation, causes the displacement threaded column 4 to rotate, thus allowing the displacement block 6 to slide horizontally on the displacement threaded column 4. A light shield 8 is connected above the displacement block 6 via a connecting column 7. A detector 9 is fixed inside the light shield 8. Simultaneously, the telescopic column 10 above the base 2 can drive the fixing mechanism 11. The position of the detector 9 relative to the tire rim can be adjusted by moving the displacement block 6 horizontally and the telescopic column 10 vertically within a certain range, allowing for comprehensive inspection of tire rims of different sizes. During the inspection process, the light shield 8 effectively blocks external light, preventing light interference with the detector 9's operation. The device automatically fixes the tire rim using a fixing mechanism 11 driven by an electric push rod 1102, eliminating the need for manual handling and significantly improving inspection efficiency. Compared to traditional manual fixing methods, this reduces instability caused by human fatigue and improper operation, ensuring the stability of the inspection process and the accuracy of the results. This provides a reliable guarantee for long-term stable inspection work. The fixing mechanism 11 can adapt to tire rims of different sizes, overcoming the limitation of some existing inspection devices that can only handle a single type of rim. This allows the device to meet the inspection needs of tire rims of various specifications.This improves the versatility of the device, eliminating the need for companies to equip themselves with multiple testing devices for steel rings of different sizes. This reduces equipment procurement costs and the complexity of the testing process, effectively improving the company's economic benefits and overall testing efficiency. The electric actuator 1102 is model XYDHA24-800.
[0029] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.
Claims
1. A tire rim surface defect detection device, comprising a support foot (1), characterized in that: A base (2) is fixedly connected to the upper surface of the support foot (1), a displacement groove (3) is fixedly connected to the upper surface of the base (2), a displacement threaded column (4) is fixedly connected to one side surface of the displacement groove (3), a knob (5) is rotatably connected to one side surface of the displacement groove (3), a displacement block (6) is slidably connected to one side surface of the displacement threaded column (4), a connecting column (7) is fixedly connected to the upper surface of the displacement block (6), a light shield (8) is fixedly connected to the upper surface of the connecting column (7), a detector (9) is fixedly connected to the inner surface of the light shield (8), a telescopic column (10) is fixedly connected to the upper surface of the base (2), and a fixing mechanism (11) is fixedly connected to the upper surface of the telescopic column (10). The fixing mechanism (11) includes a fixing block (1101), an electric push rod (1102), a connecting ring (1103), a rotating rod (1104), a bearing (1105), a connecting plate (1106), a pushing block (1107), a rubber pad (1108), and a limiting rod (1109). The fixing block (1101) is fixedly connected to the upper surface of the telescopic column (10). The electric push rod (1102) is fixedly connected to one side surface of the fixing block (1101). The connecting ring (1109) is fixedly connected to one side surface of the electric push rod (1102). 1103), a rotating rod (1104) is rotatably connected to one side surface of the connecting ring (1103), a bearing (1105) is fixedly connected to one side surface of the rotating rod (1104), a connecting disc (1106) is rotatably connected to one side surface of the bearing (1105), a pushing block (1107) is rotatably connected to one side surface of the rotating rod (1104), a rubber pad (1108) is fixedly connected to one side surface of the pushing block (1107), and a limit rod (1109) is fixedly connected to one side surface of the pushing block (1107).
2. The tire rim surface defect detection device according to claim 1, characterized in that: The support feet (1) are arranged in four sets symmetrically with respect to the vertical line of the base (2), and the displacement threaded columns (4) are arranged in two sets symmetrically on one side surface of the displacement groove (3).
3. The tire rim surface defect detection device according to claim 1, characterized in that: The knob (5) has multiple anti-slip textures on its outer side, and the displacement block (6) can be controlled to slide on the displacement threaded column (4) by rotating the knob (5).
4. The tire rim surface defect detection device according to claim 1, characterized in that: The light shield (8) can effectively block external light and prevent light from interfering with the detection instrument (9) during detection. The telescopic column (10) can drive the fixing mechanism (11) to move up and down within a certain range to meet the device's detection of tire steel rims of different sizes.
5. The tire rim surface defect detection device according to claim 1, characterized in that: The fixing mechanism (11) has two sets of fixed connections on the upper surface of the base (2), which respectively fix the left and right sides of the tire steel rim. The connecting ring (1103) is fixedly connected to the cylinder of the electric push rod (1102), and the connecting plate (1106) is fixedly connected to the push plate of the electric push rod (1102).
6. The tire rim surface defect detection device according to claim 1, characterized in that: The rotating rod (1104), bearing (1105), push block (1107) and rubber pad (1108) are arranged symmetrically in four groups around the central axis of the connecting plate (1106). When the push rod of the electric push rod (1102) moves backward, the connecting ring (1103) and the connecting plate (1106) move closer to each other, which causes the included angle between the rotating rod (1104) and the connecting plate (1106) to increase, which causes the radius of the circle formed by the four push blocks (1107) to increase, thereby achieving the clamping of the tire rim.
7. The tire rim surface defect detection device according to claim 1, characterized in that: The limiting rods (1109) are arranged in two sets in parallel opposite to each other between the upper and lower pushing blocks (1107), and similarly, two sets are arranged in parallel opposite to each other between the left and right pushing blocks (1107). The rubber pads (1108) are made of silicone rubber.