A sealing ring height detection device

Abstract

This invention provides a sealing ring height detection device, including a bracket, a lifting hydraulic cylinder fixed to the outside of the bracket, a gantry frame connected to the end of the telescopic rod of the lifting hydraulic cylinder, a conductive slip ring fixedly connected to the center of the gantry frame, the conductive slip ring including an outer guide ring and an inner shaft, the outer guide ring being fixedly connected to the gantry frame, an inner shaft being rotatably nested inside, a camera assembly and a laser module connected to the bottom of the inner shaft and connected to a signal line on the inner shaft, a drive wheel connected to the top of the inner shaft, the drive wheel being connected to the output end of a drive motor fixed on the gantry frame, driving the inner shaft to rotate, the laser module driven by the inner shaft to excite laser lines to scan the end face structure of the sealing ring, the scanning forming a light and shadow contrast between the end face of the sealing ring and the inner wall of the light shield to reveal defects on the end face of the sealing ring, and then the camera assembly taking pictures for comparative analysis, realizing the detection of end face flatness, which has good development prospects.

Description

Technical Field

[0001] This invention relates to the field of laser measurement, specifically to a device for detecting the height of a sealing ring. Background Technology

[0002] Rubber seals are components installed on various mechanical equipment, widely used in automotive manufacturing, hydraulics, pneumatics, and precision instruments. They are core components for preventing fluid leakage and maintaining system pressure. The integrity of their edge contours directly affects the safety and lifespan of the entire mechanical system; even micron-sized notches or excess burrs can lead to serious seal failure during use. Therefore, in modern large-scale production, using machine vision technology for full visual inspection of seals has become a crucial step in ensuring factory quality and eliminating defective products.

[0003] As the main contact surfaces for sealing, the inner and outer circumferential surfaces of the sealing ring are often designed as a single piece to ensure surface flatness and achieve better sealing performance. However, the end face or the connection point between the inner and outer circumferential surfaces of the sealing ring often becomes the location of the mold parting line. Traditional visual processing technology mainly compares the captured images with the set standard shape. It lacks effective means to detect small burrs on the edges, excess glue, protrusions and gaps in the parting line at the end face. The accuracy of detecting the flatness of the end face of the sealing ring is low, which can easily lead to the omission of defective products, ultimately causing the sealing ring to fail and affecting the safety and lifespan of the entire mechanical system.

[0004] Therefore, a new type of sealing ring height detection device is needed to solve the above problems. Summary of the Invention

[0005] The purpose of this invention is to provide a sealing ring height detection device.

[0006] To achieve the above objectives, the present invention provides the following technical solution:

[0007] A sealing ring height detection device comprises a set of brackets arranged symmetrically at intervals. A vertically telescopic lifting hydraulic cylinder is fixedly connected to the outer side of each bracket. The end of the telescopic rod of the lifting hydraulic cylinder is connected to a gantry spanning the brackets. A conductive slip ring is fixedly connected to the center of the gantry. The conductive slip ring includes an outer guide ring and an inner shaft. The outer guide ring is fixedly connected to the gantry, and the inner shaft is rotatably nested inside. A camera assembly and a laser module are connected to the bottom of the inner shaft and are connected to a signal line on the inner shaft. A drive wheel is connected to the top of the inner shaft, and the drive wheel is connected to the output end of a drive motor fixed on the gantry to drive the inner shaft to rotate. A ring-shaped light shield is connected to the bottom of the gantry to shield the portion of the conductive slip ring below the outer guide ring.

[0008] As a further aspect of the present invention: the bottom of the gantry frame is provided with a disc structure corresponding to the inner diameter of the light shield, the lower edge of the outer guide ring is fixedly connected to the disc structure, the inner side of the light shield is fixedly connected with a vertical guide post, the guide post passes through the disc structure of the gantry frame and is vertically slidably connected to the gantry frame, and a pressure spring is sleeved on the outer side of the guide post, the two ends of the pressure spring abut against the gantry frame and the light shield structure respectively, and the pressure spring always acts on the light shield so that the light shield maintains the tendency to slide downward along the guide post relative to the gantry frame.

[0009] As a further aspect of the present invention: the bottom surface of the bottom disc structure of the gantry frame and the inner wall of the light shield are treated with light-absorbing black paint spraying.

[0010] As a further aspect of the invention: the top of the light shield has an annular edge extending toward the center.

[0011] As a further aspect of the present invention: the bottom of the light shield has a protruding structure corresponding to the gap between the two brackets to shield the gap between the two brackets.

[0012] As a further aspect of the present invention: the inner shaft is a hollow, side-opening tubular fork structure, with an arc-shaped guide frame fixed to the bottom by fixing bolts. The laser module is slidably mounted on the guide frame and slides along the guide frame at an angle. An adjusting hydraulic cylinder is fixed on the gantry frame. The telescopic rod of the adjusting hydraulic cylinder extends into the inner shaft to the bottom fork and is rotatably connected to an adapter. The adapter and the laser module are hinged together by a transmission link for transmission. The adjusting hydraulic cylinder, through the adapter and the transmission link, achieves the fixed-track sliding of the laser module along the guide frame without affecting the circumferential rotation of the laser module with the inner shaft.

[0013] As a further aspect of the present invention: the guide frame is a non-circular track, which is composed of three track segments whose curvature gradually decreases from bottom to top.

[0014] As a further aspect of the present invention: the guide frame is distributed across the inner shaft axis, and has a protruding counterweight structure on the side opposite to the laser module mounting side.

[0015] As a further embodiment of the present invention: a transverse extension rod is provided at the bottom of the inner shaft rod, the guide frame is set away from the axis of the inner shaft rod through the extension rod and is fixed by fixing bolts, a counterweight is provided at the other end of the extension rod, the counterweight is also set away from the axis of the inner shaft rod and is fixed by fixing bolts, and the fixing position is symmetrical with the guide frame along the axis of the inner shaft rod, the transmission connecting rod is a two-section nested telescopic structure, and the length of the two sections is fixed and controlled by fixing bolts.

[0016] Beneficial effects

[0017] 1. The present invention has a conductive slip ring fixedly connected to the center of the gantry frame. The conductive slip ring includes an outer guide ring and an inner shaft. The outer guide ring is fixedly connected to the gantry frame, and the inner shaft is rotatably nested inside. The bottom of the inner shaft is connected to a camera assembly and a laser module, and is connected to a signal line on the inner shaft. The top of the inner shaft is connected to a drive wheel, which is connected to the output end of a drive motor fixed on the gantry frame to drive the inner shaft to rotate. The laser module driven by the inner shaft to rotate excites a laser line to scan the end face structure of the sealing ring. After scanning, a light and shadow contrast is formed between the end face of the sealing ring and the inner wall of the light shield to realize the manifestation of defects on the end face of the sealing ring. Then, the camera assembly takes pictures for comparative analysis to realize the detection of the flatness of the end face.

[0018] 2. The inner shaft of this invention is a hollow, side-opening tubular fork structure. An arc-shaped guide frame is fixed to the bottom by fixing bolts. The laser module is slidably mounted on the guide frame and slides along it at an angle. An adjusting hydraulic cylinder is fixed on the gantry frame. The telescopic rod of the adjusting hydraulic cylinder extends into the inner shaft to the bottom fork, and its end is rotatably connected to an adapter. A transmission link is hinged between the adapter and the laser module for transmission. The adjusting hydraulic cylinder, through the adapter and the transmission link, achieves laser module rotation without affecting the circumferential rotation of the laser module with the inner shaft. The optical module slides along the guide rail, and then the hydraulic cylinder is used to adjust the angle and height of the laser module. At the low position, the laser is excited at an elevation angle to irradiate the inner edge of the sealing ring end face; at the middle position, the laser is excited at a small depression angle to irradiate the sealing ring end face; and at the high position, the laser is excited at a large depression angle to irradiate the outer edge of the sealing ring end face. This forms targeted structural projections on the upper side of the inner wall of the light shield, the sealing ring end face, and the lower side of the inner wall of the light shield, enabling targeted identification of defects in various parts of the structure. Furthermore, the laser can adapt to sealing rings of different diameters by changing the excitation angle and height.

[0019] 3. The guide frame of this invention is a non-circular track, which is composed of three track segments with gradually decreasing curvature from bottom to top. By changing the center position of the laser beam after it is emitted, the midpoint of the laser line, i.e. the irradiation position, is achieved by the different center positions of the tracks with different curvatures. These positions correspond to the irradiation of the inner and outer edges and the end face of the sealing ring, respectively, so that the irradiation point fits the position to be measured, thereby enhancing the development of burrs on the edge or pits and impurities on the end face. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the overall structure of the present invention.

[0021] Figure 2 This is a schematic diagram of the internal structure of the present invention.

[0022] Figure 3 This is a schematic diagram of the bracket structure of the present invention.

[0023] Figure 4This is a schematic diagram of the connection of the light shield of the present invention.

[0024] Figure 5 This is a schematic diagram of the installation of the camera module and laser module of the present invention.

[0025] Figure 6 This is a schematic diagram of the camera module and laser module driver of the present invention.

[0026] Figure 7 For the present invention Figure 6 An enlarged schematic diagram of the structure at point A.

[0027] Figure 8 This is a schematic diagram of the inner shaft structure of the present invention.

[0028] Figure 1-8 In the middle: 1. Bracket; 2. Lifting hydraulic cylinder; 3. Gantry frame; 4. Conductive slip ring; 41. Outer guide ring; 42. Inner shaft; 43. Signal line; 44. Drive wheel; 5. Drive motor; 6. Camera assembly; 7. Laser module; 8. Guide frame; 9. Fixing bolt; 10. Adjusting hydraulic cylinder; 11. Adapter; 12. Transmission link; 13. Guide column; 14. Sunshade; 15. Pressure spring. Detailed Implementation

[0029] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0030] Please see Figures 1-8 , Figure 1 This is a schematic diagram of the overall structure of an embodiment of the present invention; Figure 2 This is a schematic diagram of the internal structure of the present invention; Figure 3 This is a schematic diagram of the bracket structure of the present invention; Figure 4 This is a schematic diagram of the connection of the light shield of the present invention; Figure 5 This is a schematic diagram of the installation of the camera module and laser module of the present invention; Figure 6 This is a schematic diagram of the camera module and laser module driver of the present invention; Figure 7 For the present invention Figure 6 Enlarged schematic diagram of the structure at point A; Figure 8 This is a schematic diagram of the inner shaft structure of the present invention.

[0031] Example 1

[0032] This embodiment provides a sealing ring height detection device, such as... Figure 1-4As shown, the system includes a set of brackets 1 arranged symmetrically at intervals. A vertically telescopic lifting hydraulic cylinder 2 is fixedly connected to the outer side of the bracket 1. The telescopic rod of the lifting hydraulic cylinder 2 is connected to a gantry frame 3 that spans the bracket 1. A conductive slip ring 4 is fixedly connected to the center of the gantry frame 3. The conductive slip ring 4 includes an outer guide ring 41 and an inner shaft 42. The outer guide ring 41 is fixedly connected to the gantry frame 3. The inner shaft 42 is rotatably nested inside the outer guide ring 42. The bottom of the inner shaft 42 is connected to a camera assembly 6 and a laser module 7, and is connected to a signal line 43 on the inner shaft 42. The top of the inner shaft 42 is connected to a drive wheel 44. The drive wheel 44 is connected to the output end of a drive motor 5 fixed on the gantry frame 3 to drive the inner shaft 42 to rotate. A ring-shaped light shield 14 is connected to the bottom of the gantry frame 3 to shield the part below the outer guide ring 41 of the conductive slip ring 4.

[0033] In the specific implementation process, the lifting hydraulic cylinder 2 drives the mechanical energy of the components on the gantry 3 to lift the whole, making room for the placement of the sealing ring. The sealing ring is inserted into the center of the bracket 1 through the gap of the bracket 1 by the gripper. After the sealing ring is placed in place, the lifting hydraulic cylinder 2 resets. The light shield 14 shields the entire sealing ring. Then, the inner shaft rod 42 drives the rotating laser module 7 to excite the laser line to scan the end face structure of the sealing ring. After scanning, the light and shadow contrast is formed between the end face of the sealing ring and the inner wall of the light shield 14 to realize the defects on the end face of the sealing ring and detect the flatness of the end face. Then, the camera component 6 takes pictures for comparison and analysis. In order to realize the rotation power supply of the laser module 7 and the camera component 6, a conductive slip ring 4 is used for power supply and signal connection. The light shield 14 is set on the outside of the conductive slip ring 4 to shield the external ambient light and also to support the contrast shadow formed by scanning.

[0034] Among them, such as Figure 4 As shown, the bottom of the gantry 3 is provided with a disc structure corresponding to the inner diameter of the light shield 14. The lower edge of the outer guide ring 41 is fixedly connected to the disc structure. The inner side of the light shield 14 is fixedly connected with a vertical guide post 13. The guide post 13 passes through the disc structure of the gantry 3 and is vertically slidably connected to the gantry 3. A pressure spring 15 is sleeved on the outer side of the guide post 13. The two ends of the pressure spring 15 abut against the structure of the gantry 3 and the light shield 14 respectively. The pressure spring 15 always acts on the light shield 14 so that the light shield 14 maintains the tendency to slide downward relative to the gantry 3 along the guide post 13.

[0035] The sliding connection between the guide post 13 and the light shield 14 provides vertical elastic movement margin for the light shield 14, so that the light shield 14 and the bracket 1 structure are always in contact within a certain height range of the gantry 3. That is, the light shield 14 can achieve the light shielding effect within a certain height range of the laser module 7, so as to adapt to the detection of sealing rings at different heights.

[0036] Specifically, such as Figure 2 , Figure 4 As shown, the top of the light shield 14 has an annular edge extending towards the center, and the bottom of the light shield 14 has a protruding structure corresponding to the interval between the two brackets 1 to shield the two brackets 1, reducing the amount of ambient light entering the light shield 14, avoiding the influence of the light source, and improving the development contrast. At the same time, the bottom surface of the disc structure at the bottom of the gantry 3 and the inner wall of the light shield 14 are treated with light-absorbing black paint to reduce the diffuse scattering of the light source excited by the laser module 7 inside the light shield 14 and improve the development effect.

[0037] Among them, such as Figure 6 , Figure 8 As shown, in order to achieve targeted development of the inner and outer edges and end face of the sealing ring by excitation light source from different angles and heights, the inner shaft 42 is a hollow tube fork structure with a side opening at the bottom. The bottom is fixed with an arc-shaped guide frame 8 by fixing bolts 9. The laser module 7 is slidably mounted on the guide frame 8 and slides along the guide frame 8 at an angle. An adjusting hydraulic cylinder 10 is fixed on the gantry 3. The telescopic rod of the adjusting hydraulic cylinder 10 extends into the inner shaft 42 and extends to the bottom fork. The end is rotatably connected to an adapter 11. The adapter 11 and the laser module 7 are hinged to a transmission link 12 for transmission connection. The adjusting hydraulic cylinder 10 achieves the fixed track sliding of the laser module 7 along the guide frame 8 without affecting the circumferential rotation of the laser module 7 with the inner shaft 42 through the adapter 11 and the transmission link 12.

[0038] Then, the hydraulic cylinder 10 is used to drive the laser module 7 to adjust the angle and height. At the low position, the laser is excited at an elevation angle to irradiate the inner edge of the sealing ring end face; at the middle position, the laser is excited at a small depression angle to irradiate the sealing ring end face; and at the high position, the laser is excited at a large depression angle to irradiate the outer edge of the sealing ring end face. This forms targeted structural projections on the upper side of the inner wall of the light shield 14, the sealing ring end face, and the lower side of the inner wall of the light shield 14, enabling targeted identification of defect structures in various parts. Furthermore, the laser module 7 can be adapted to sealing rings of different diameters by changing the excitation angle and height.

[0039] Specifically, such as Figure 5 As shown, the guide frame 8 is a non-circular track, which is composed of three track segments whose curvature gradually decreases from bottom to top.

[0040] Furthermore, by varying the center positions of the different curvature tracks, the midpoint of the laser beam after emission is switched, which corresponds to the irradiation position. This irradiation is directed towards the inner and outer edges and the end face of the sealing ring, respectively, so that the irradiation point fits the measured position, thereby enhancing the development of edge burrs or end face pits and impurities.

[0041] Meanwhile, in order to improve the stability of the rotating inner shaft 42, the guide frame 8 is distributed across the axis of the inner shaft 42, and there is a protruding counterweight structure on the side opposite to the laser module 7 mounting side. The counterweight is used to level the overall center of the inner shaft 42 and its components, thereby reducing the eccentric force received by the inner shaft 42 during rotation and improving the stability of the light source and the shooting during rotation.

[0042] Example 2

[0043] Based on Embodiment 1, the difference between this embodiment and Embodiment 1 is that a transverse extension rod is provided at the bottom of the inner shaft rod 42. The guide frame 8 is set away from the axis of the inner shaft rod 42 through the extension rod and is fixed by the fixing bolt 9. The counterweight on the guide frame 8 is set separately from the guide frame 8, and is also set away from the axis of the inner shaft rod 42 and fixed by the fixing bolt 9. The fixing position is symmetrical with the guide frame 8 along the axis of the inner shaft rod 42. The transmission connecting rod 12 is a two-section nested telescopic structure, and the length between the two sections is fixed and controlled by the fixing bolt 9.

[0044] By extending the distance between the guide frame 8 and the inner shaft rod 42, the radial distance of the guide frame 8 can be adjusted before testing, so that the laser module 7 is closer to the inner circumference of the sealing ring. By bringing the light source closer to the sealing ring being tested, the scattering of light is reduced and the contrast is increased.

[0045] In the specific implementation process, based on the sealing ring size data of the current batch of tests, the guide frame 8 can be moved to a position close to the inner wall of the sealing ring, and the position of the counterweight block at the other end can be adjusted accordingly to achieve balancing. By moving the light source closer, the scattering of the light source is reduced, and the contrast between the light plate and the shadow projected onto the inner wall of the light shield 14 is enhanced, thereby enhancing the contrast effect.

[0046] Although embodiments of the 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 invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A sealing ring height detection device, characterized in that, include: Bracket (1), a group of brackets (1) arranged symmetrically at intervals, a vertically telescopic lifting hydraulic cylinder (2) is fixedly connected to the outside of the bracket (1), and a gantry (3) spanning the bracket (1) is connected to the end of the telescopic rod of the lifting hydraulic cylinder (2). Conductive slip ring (4), a conductive slip ring (4) is fixedly connected to the center of the gantry frame (3). The conductive slip ring (4) includes an outer guide ring (41) and an inner shaft (42). The outer guide ring (41) is fixedly connected to the gantry frame (3), and the inner shaft (42) is rotatably nested inside. The camera assembly (6) and the laser module (7) are connected at the bottom of the inner shaft (42) and are connected to the signal line (43) on the inner shaft (42). The top of the inner shaft (42) is connected to the drive wheel (44). The drive wheel (44) is connected to the output end of the drive motor (5) fixed on the gantry (3) to drive the inner shaft (42) to rotate. A light shield (14) is connected to the bottom of the gantry frame (3) to shield the part below the outer guide ring (41) of the conductive slip ring (4).

2. The sealing ring height detection device according to claim 1, characterized in that: The bottom of the gantry (3) is provided with a disc structure corresponding to the inner diameter of the light shield (14). The lower edge of the outer guide ring (41) is fixedly connected to the disc structure. The inner side of the light shield (14) is fixedly connected with a vertical guide post (13). The guide post (13) passes through the disc structure of the gantry (3) and slides vertically with the gantry (3). A pressure spring (15) is sleeved on the outer side of the guide post (13). The two ends of the pressure spring (15) abut against the gantry (3) and the light shield (14) structure respectively. The pressure spring (15) always acts on the light shield (14) so ​​that the light shield (14) maintains the tendency to slide downward relative to the gantry (3) along the guide post (13).

3. The sealing ring height detection device according to claim 2, characterized in that: The bottom surface of the bottom disc structure of the gantry frame (3) and the inner wall of the light shield (14) are treated with light-absorbing black paint spraying.

4. The sealing ring height detection device according to claim 2, characterized in that: The top of the light shield (14) has an annular edge extending toward the center.

5. The sealing ring height detection device according to claim 2, characterized in that: The bottom of the light shield (14) has a protruding structure corresponding to the gap between the two brackets (1) to shield the gap between the two brackets (1).

6. The sealing ring height detection device according to claim 1, characterized in that: The inner shaft (42) is a hollow tube fork structure with a side opening at the bottom. An arc-shaped guide frame (8) is fixed to the bottom by a fixing bolt (9). The laser module (7) is slidably mounted on the guide frame (8) and slides along the guide frame (8) at an angle. An adjusting hydraulic cylinder (10) is fixed on the gantry (3). The telescopic rod of the adjusting hydraulic cylinder (10) extends into the inner shaft (42) and extends to the bottom fork. The end is rotatably connected to an adapter (11). The adapter (11) and the laser module (7) are hinged together by a transmission link (12) for transmission connection. The adjusting hydraulic cylinder (10) achieves the fixed-track sliding of the laser module (7) along the guide frame (8) without affecting the circumferential rotation of the laser module (7) with the inner shaft (42) through the adapter (11) and the transmission link (12).

7. The sealing ring height detection device according to claim 6, characterized in that: The guide frame (8) is a non-circular track, which is composed of three track segments whose curvature gradually decreases from bottom to top.

8. The sealing ring height detection device according to claim 6, characterized in that: The guide frame (8) is distributed across the axis of the inner shaft (42) and has a protruding counterweight structure on the side opposite to the mounting side of the laser module (7).

9. A sealing ring height detection device according to claim 6, characterized in that: The bottom of the inner shaft (42) is provided with a transverse extension rod. The guide frame (8) is set away from the axis of the inner shaft (42) through the extension rod and is fixed by the fixing bolt (9). The other end of the extension rod is provided with a counterweight block. The counterweight block is also set away from the axis of the inner shaft (42) and is fixed by the fixing bolt (9). The fixing position is symmetrical with the guide frame (8) along the axis of the inner shaft (42). The transmission connecting rod (12) is a two-section nested telescopic structure. The length between the two sections is fixed and controlled by the fixing bolt (9).

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