A leakage detection device for welded nuts
By designing an automated welding nut leak detection device, which utilizes hydraulic cylinders and motor-driven adjustment and detection mechanisms, the problem of low efficiency in traditional manual inspection is solved. This enables rapid and accurate welding quality inspection, ensuring the reliability of welding nuts and the safety of the entire vehicle.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- JIANGYIN YIDEGAO AUTOMOBILE FASTENER MANUFACTURING CO LTD
- Filing Date
- 2025-09-04
- Publication Date
- 2026-06-23
AI Technical Summary
Traditional methods of manual visual inspection and spot checks of welded nuts with manual wrenches are inefficient, make it difficult to quickly and accurately detect welding quality, and pose safety hazards.
A leak-proof detection device for welded nuts was designed. It uses a hydraulic cylinder and a motor-driven adjustment and detection mechanism to automatically detect the welding quality of the nuts and judges the welding condition of the nuts through a torque sensor.
It enables automated, rapid, and accurate detection of incomplete and false welds in welded nuts, improving detection efficiency and ensuring welding quality and vehicle safety.
Smart Images
Figure CN224399620U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of welding nut detection technology, specifically a welding nut leak prevention detection device. Background Technology
[0002] In the automotive manufacturing and construction machinery industries, welded nuts are critical connecting components that must be fixed to the surfaces of automotive parts such as body panels and chassis brackets through welding processes. The quality of their welding directly determines the reliability of subsequent assembly and the safety of the entire vehicle. Problems such as incomplete welding, weak welding, or blocked threads can prevent bolts from being screwed in properly, or cause nuts to fall off over time, posing safety hazards. Therefore, leak-proof testing of welded nuts has become a core quality control point in the automotive parts production process.
[0003] In traditional small- and medium-scale production, the main methods used are manual visual inspection and random sampling with manual wrenches. Operators visually inspect the surface of automotive parts to determine if there are any missing nuts. For nuts that are suspected to be qualified, they use a manual wrench to try to screw in the bolts and judge by feel whether the threaded holes are unobstructed and whether the welds are strong. Long-term inspection can easily lead to fatigue among workers, which reduces the inspection speed and affects work efficiency. Therefore, improvements are needed. Utility Model Content
[0004] The purpose of this invention is to provide a leak-proof detection device for welded nuts to solve the problems mentioned in the background art.
[0005] To achieve the above objectives, this utility model provides the following technical solution: a welding nut leak-proof detection device, including a base, a fixed platform fixedly connected to the top of the base, an adjustment mechanism provided on the top of the fixed platform, a detection mechanism provided on the inner side of the base, an automotive part provided on the top of the adjustment mechanism, and a nut welded to the top of the automotive part;
[0006] The adjustment mechanism includes a support frame, which is fixedly connected to the top of the fixed platform. The support frame is also fixedly connected to the left side of the top of the fixed platform. A first hydraulic cylinder is fixedly connected to the top of the support frame. A linkage frame is fixedly connected to the bottom of the first hydraulic cylinder. A lifting plate is fixedly connected to the bottom of the linkage frame. The bottom of the lifting plate is fixedly connected to a fixed frame. A drive motor is fixedly connected to the right side of the fixed frame. A second threaded rod is fixedly connected to the left side of the drive motor. The second threaded rod is rotatably threaded to the inside of the fixed frame. A threaded plate is threaded to the outer periphery of the second threaded rod. A load-bearing frame is fixedly connected to the top of the threaded plate. An L-shaped plate is fixedly connected to the top of the load-bearing frame. A first threaded rod is threaded to the inner side of the L-shaped plate. A pressing plate is fixedly connected to the bottom of the first threaded rod. A connecting plate is fixedly connected to the inner side of the base. A second hydraulic cylinder is fixedly connected to the bottom of the connecting plate. The second hydraulic cylinder is fixedly connected to the bottom of the fixed frame.
[0007] Preferably, the inner side of the fixed frame is provided with a groove corresponding to the movement trajectory of the threaded plate, and the threaded plate is slidably connected inside the groove. Through the groove, the threaded plate can slide inside the fixed frame, making the threaded plate more stable during movement.
[0008] Preferably, the inner side of the lifting plate is provided with a fixing groove corresponding to the movement trajectory of the load-bearing frame, and the load-bearing plate is slidably connected to the inside of the fixing groove. Through the fixing groove, the load-bearing frame can move inside the lifting plate, so that the load-bearing frame can drive the fixed automotive parts to move.
[0009] Preferably, the inner side of the support frame is provided with a limiting groove corresponding to the movement trajectory of the linkage frame, and the linkage frame is slidably connected inside the limiting groove. The limiting groove makes the linkage frame more stable during the lifting and lowering process.
[0010] Preferably, there are two L-shaped plates, which are fixedly connected to the front and rear sides of the top of the load-bearing frame. When the first threaded rod moves downward inside the L-shaped plate, it can drive the pressing plate to press and fix the car parts.
[0011] Preferably, the automotive part is disposed on the top of the lifting plate, and the bottom of the automotive part is in contact with the top of the lifting plate, and the bottom of the pressing plate is in contact with the top of the automotive part, so that the lifting plate can provide support for the automotive part.
[0012] Preferably, the inner side of the fixed platform is provided with a sliding groove corresponding to the movement trajectory of the fixed frame and the threaded plate, and the fixed frame and the threaded plate are slidably connected inside the sliding groove. Through the sliding groove, the threaded plate and the fixed frame can slide inside the fixed platform.
[0013] Preferably, the detection mechanism includes a load-bearing plate, which is fixedly connected to the inner side of the base. A rotating motor is fixedly connected to the top of the load-bearing plate, a rotating shaft is fixedly connected to the top of the rotating motor, a fixed cylinder is fixedly connected to the top of the rotating shaft, a torque sensor is inserted inside the fixed cylinder, a linkage plate is fixedly connected to the top of the torque sensor, a detection screw is fixedly connected to the top of the linkage plate, and mounting bolts are provided inside the fixed cylinder.
[0014] Preferably, the mounting bolt passes through the fixed cylinder and is threaded to the bottom of the inner side of the torque sensor. The mounting bolt can fix the torque sensor to the top of the fixed cylinder, so that when the rotating motor drives the fixed cylinder to rotate through the rotating shaft, the fixed cylinder can drive the torque sensor to rotate.
[0015] Preferably, the inner side of the lifting plate is provided with a fixing hole corresponding to the position of the detection screw, and the detection screw is slidably connected to the inner side of the fixing hole. Through the fixing hole, the detection screw can pass through the top of the lifting plate.
[0016] Compared with the prior art, this utility model provides a welding nut leak prevention detection device, which has the following beneficial effects:
[0017] 1. In the adjustment mechanism of this welded nut leak detection device, the second threaded rod and the threaded plate are moved by the drive motor. The threaded plate moves the L-shaped plate through the load-bearing frame. The L-shaped plate moves the fixed car part to the left, so that the nut on the top of the car part can be moved to the opening on the left side of the top of the lifting plate. The first hydraulic cylinder and the second hydraulic cylinder can drive the lifting plate to move downward, so that the detection screw can pass through the inside of the lifting plate and be threaded into the inside of the nut to detect the welded nut.
[0018] 2. In this welded nut leak detection device, the detection mechanism is such that a rotating motor drives a fixed cylinder to rotate via a rotating shaft, which in turn drives a torque sensor and a linkage disc to rotate. The linkage disc then drives a detection screw to rotate. When the detection screw encounters internal resistance from the nut, the rotating motor reverses, causing the detection screw to move away from the nut, thus proving that there is no leaked nut at the detection location. When the torque sensor does not detect any resistance, it proves that there is a leaked nut at the detection location. Attached Figure Description
[0019] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0020] Figure 1 This is a front view structural diagram of the present invention;
[0021] Figure 2 This is a schematic diagram of the adjustment mechanism.
[0022] Figure 3 A schematic diagram of the second threaded rod, the pressing plate, and the first threaded rod;
[0023] Figure 4 This is a schematic diagram of the testing mechanism.
[0024] In the diagram: 1. Base; 2. Detection mechanism; 21. Load-bearing plate; 22. Rotary motor; 23. Mounting bolt; 24. Torque sensor; 25. Detection screw; 26. Linkage plate; 27. Fixed cylinder; 28. Rotating shaft; 3. Fixed platform; 4. Adjustment mechanism; 41. Support frame; 42. Lifting plate; 43. First hydraulic cylinder; 44. Linkage frame; 45. Fixed frame; 46. Drive motor; 47. Connecting plate; 48. Second hydraulic cylinder; 49. Second threaded rod; 401. Pressing plate; 402. First threaded rod; 403. L-shaped plate; 404. Load-bearing frame; 405. Threaded plate; 5. Nut; 6. Automotive parts. Detailed Implementation
[0025] 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.
[0026] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.
[0027] This utility model provides the following technical solution:
[0028] Example 1
[0029] Please see Figure 1-4 This utility model provides a technical solution: a welding nut leak detection device, including a base 1, a fixed platform 3 fixedly connected to the top of the base 1, an adjustment mechanism 4 provided on the top of the fixed platform 3, a detection mechanism 2 provided on the inner side of the base 1, an automotive part 6 provided on the top of the adjustment mechanism 4, and a nut 5 welded to the top of the automotive part 6.
[0030] The adjusting mechanism 4 includes a support frame 41, which is fixedly connected to the top of the fixed platform 3. The support frame 41 is also fixedly connected to the top left side of the fixed platform 3. A first hydraulic cylinder 43 is fixedly connected to the top of the support frame 41. A linkage frame 44 is fixedly connected to the bottom of the first hydraulic cylinder 43. A lifting plate 42 is fixedly connected to the bottom of the linkage frame 44. The bottom of the lifting plate 42 is fixedly connected to a fixed frame 45. A drive motor 46 is fixedly connected to the right side of the fixed frame 45. A second threaded rod 49 is fixedly connected to the left side of the drive motor 46. The second threaded rod 49 rotates... A threaded connection is made to the inner side of the fixed frame 45. A threaded plate 405 is threadedly connected to the outer side of the second threaded rod 49. A load-bearing frame 404 is fixedly connected to the top of the threaded plate 405. An L-shaped plate 403 is fixedly connected to the top of the load-bearing frame 404. A first threaded rod 402 is threadedly connected to the inner side of the L-shaped plate 403. A pressing plate 401 is fixedly connected to the bottom of the first threaded rod 402. A connecting plate 47 is fixedly connected to the inner side of the base 1. A second hydraulic cylinder 48 is fixedly connected to the bottom of the connecting plate 47. The second hydraulic cylinder 48 is fixedly connected to the bottom of the fixed frame 45.
[0031] Furthermore, a groove corresponding to the movement trajectory of the threaded plate 405 is provided on the inner side of the fixed frame 45, and the threaded plate 405 is slidably connected to the inside of the groove. Through the groove, the threaded plate 405 can slide inside the fixed frame 45, making the threaded plate 405 more stable during movement.
[0032] Furthermore, a fixing groove corresponding to the movement trajectory of the load-bearing frame 404 is provided on the inner side of the lifting plate 42, and the load-bearing plate 21 is slidably connected to the inside of the fixing groove. Through the fixing groove, the load-bearing frame 404 can move inside the lifting plate 42, so that the load-bearing frame 404 can drive the fixed car parts 6 to move.
[0033] Furthermore, the inner side of the support frame 41 is provided with a limiting groove corresponding to the movement trajectory of the linkage frame 44, and the linkage frame 44 is slidably connected inside the limiting groove. The limiting groove makes the linkage frame 44 more stable during the lifting and lowering process.
[0034] Furthermore, there are two L-shaped plates 403, which are fixedly connected to the front and rear sides of the top of the load-bearing frame 404. When the first threaded rod 402 moves downward inside the L-shaped plate 403, it can drive the pressing plate 401 to press and fix the car part 6.
[0035] Furthermore, the car part 6 is positioned on top of the lifting plate 42, and the bottom of the car part 6 is in contact with the top of the lifting plate 42. The bottom of the pressing plate 401 is also in contact with the top of the car part 6. The lifting plate 42 can provide support for the car part 6.
[0036] Furthermore, a sliding groove corresponding to the movement trajectory of the fixed frame 45 and the threaded plate 405 is provided on the inner side of the fixed platform 3, and the fixed frame 45 and the threaded plate 405 are slidably connected inside the sliding groove. Through the sliding groove, the threaded plate 405 and the fixed frame 45 can slide inside the fixed platform 3.
[0037] Example 2
[0038] Please see Figure 1-4 Furthermore, based on Embodiment 1, the detection mechanism 2 includes a load-bearing plate 21, which is fixedly connected to the inner side of the base 1. A rotating motor 22 is fixedly connected to the top of the load-bearing plate 21, a rotating shaft 28 is fixedly connected to the top of the rotating motor 22, a fixed cylinder 27 is fixedly connected to the top of the rotating shaft 28, a torque sensor 24 is inserted inside the fixed cylinder 27, a linkage plate 26 is fixedly connected to the top of the torque sensor 24, a detection screw 25 is fixedly connected to the top of the linkage plate 26, and mounting bolts 23 are provided inside the fixed cylinder 27.
[0039] Furthermore, the mounting bolt 23 passes through the fixed cylinder 27 and is threaded to the bottom of the inner side of the torque sensor 24. The mounting bolt 23 can fix the torque sensor 24 to the top of the fixed cylinder 27, so that when the rotating motor 22 drives the fixed cylinder 27 to rotate through the rotating shaft 28, the fixed cylinder 27 can drive the torque sensor 24 to rotate.
[0040] Furthermore, a fixing hole corresponding to the position of the detection screw 25 is provided on the inner side of the lifting plate 42, and the detection screw 25 is slidably connected to the inner side of the fixing hole. Through the fixing hole, the detection screw 25 can pass through the top of the lifting plate 42.
[0041] In actual operation, when this device is used, the car part 6 is placed on the top of the support frame 404. The operator manually rotates the first threaded rod 402, which drives the pressing plate 401 to move downward and press and fix the car part 6. The drive motor 46 is turned on, which drives the support frame 404 and the car part 6 to move through the threaded plate 405. The car part 6 drives the nut 5 to move to the top opening of the lifting plate 42. The first hydraulic cylinder 43 and the second hydraulic cylinder 48 are turned on, which drive the lifting plate 42 to move downward. The lifting plate 42 is inserted into the periphery of the detection screw 25, and the detection screw 25 is inserted into the inside of the nut 5.
[0042] Turn on the rotating motor 22, so that the rotating motor 22 drives the fixed cylinder 27 and the torque sensor 24 to rotate through the rotating shaft 28. The torque sensor 24 drives the linkage disk 26 and the detection screw 25 to rotate, so that the detection screw 25 can be threaded into the nut 5. When the detection screw 25 rotates inside the nut 5, it encounters resistance. When the torque sensor 24 detects the resistance, it proves that the nut 5 is welded to the top of the automotive part 6. The rotating motor 22 reverses, so that the detection screw 25 moves away from the inside of the nut 5.
[0043] When there is no welded nut 5 on the top of the car part 6, the detection screw 25 rotates inside the car part 6 without being hindered by the outside, and the torque sensor 24 cannot detect any resistance, proving that there is no welded nut 5 on the top of the car part 6. The torque sensor 24 model is: FUTEK TFF400.
[0044] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.
Claims
1. A leak-proof detection device for welded nuts, comprising a base (1), characterized in that: The base (1) is fixedly connected to a fixed platform (3) at the top. An adjustment mechanism (4) is provided on the top of the fixed platform (3). A detection mechanism (2) is provided on the inner side of the base (1). An automotive part (6) is provided on the top of the adjustment mechanism (4). A nut (5) is welded to the top of the automotive part (6). The adjusting mechanism (4) includes a support frame (41), which is fixedly connected to the top of the fixed platform (3). The support frame (41) is fixedly connected to the left side of the top of the fixed platform (3). A first hydraulic cylinder (43) is fixedly connected to the top of the support frame (41). A linkage frame (44) is fixedly connected to the bottom of the first hydraulic cylinder (43). A lifting plate (42) is fixedly connected to the bottom of the linkage frame (44). The bottom of the lifting plate (42) is fixedly connected to the fixed frame (45). A drive motor (46) is fixedly connected to the right side of the fixed frame (45). A second threaded rod (49) is fixedly connected to the left side of the drive motor (46). 9) The rotating threaded connection is connected to the inner side of the fixed frame (45). The outer side of the second threaded rod (49) is threadedly connected to the threaded plate (405). The top of the threaded plate (405) is fixedly connected to the load-bearing frame (404). The top of the load-bearing frame (404) is fixedly connected to the L-shaped plate (403). The inner side of the L-shaped plate (403) is threadedly connected to the first threaded rod (402). The bottom of the first threaded rod (402) is fixedly connected to the pressing plate (401). The inner side of the base (1) is fixedly connected to the connecting plate (47). The bottom of the connecting plate (47) is fixedly connected to the second hydraulic cylinder (48). The second hydraulic cylinder (48) is fixedly connected to the bottom of the fixed frame (45).
2. The welding nut leak-proof detection device according to claim 1, characterized in that: The inner side of the fixed frame (45) is provided with a groove corresponding to the movement trajectory of the threaded plate (405), and the threaded plate (405) is slidably connected inside the groove.
3. The leak-proof detection device for welded nuts according to claim 1, characterized in that: The inner side of the lifting plate (42) is provided with a fixed groove corresponding to the movement trajectory of the load-bearing frame (404), and the load-bearing plate (21) is slidably connected to the inside of the fixed groove.
4. The leak-proof detection device for welded nuts according to claim 1, characterized in that: The inner side of the support frame (41) is provided with a limiting groove corresponding to the movement trajectory of the linkage frame (44), and the linkage frame (44) is slidably connected inside the limiting groove.
5. The leak-proof detection device for welded nuts according to claim 1, characterized in that: There are two L-shaped plates (403), and the two L-shaped plates (403) are fixedly connected to the front and rear sides of the top of the load-bearing frame (404).
6. The leak-proof detection device for welded nuts according to claim 1, characterized in that: The automotive part (6) is disposed on the top of the lifting plate (42), and the bottom of the automotive part (6) is in contact with the top of the lifting plate (42), and the bottom of the pressing plate (401) is in contact with the top of the automotive part (6).
7. The leak-proof detection device for welded nuts according to claim 1, characterized in that: The inner side of the fixed platform (3) is provided with a sliding groove corresponding to the movement trajectory of the fixed frame (45) and the threaded plate (405), and the fixed frame (45) and the threaded plate (405) are slidably connected inside the sliding groove.
8. The leak-proof detection device for welded nuts according to claim 1, characterized in that: The detection mechanism (2) includes a load-bearing plate (21), which is fixedly connected to the inside of the base (1). A rotating motor (22) is fixedly connected to the top of the load-bearing plate (21). A rotating shaft (28) is fixedly connected to the top of the rotating motor (22). A fixed cylinder (27) is fixedly connected to the top of the rotating shaft (28). A torque sensor (24) is inserted inside the fixed cylinder (27). A linkage plate (26) is fixedly connected to the top of the torque sensor (24). A detection screw (25) is fixedly connected to the top of the linkage plate (26). An installation bolt (23) is provided inside the fixed cylinder (27).
9. A leak-proof detection device for welded nuts according to claim 8, characterized in that: The mounting bolt (23) passes through the fixing cylinder (27) and is threaded to the bottom of the inner side of the torque sensor (24).
10. A leak-proof detection device for welded nuts according to claim 8, characterized in that: The inner side of the lifting plate (42) is provided with a fixing hole corresponding to the position of the detection screw (25), and the detection screw (25) is slidably connected to the inner side of the fixing hole.