A testing device for the installation of nuts in automotive parts

Abstract

This invention belongs to the field of nut installation testing technology and discloses a nut installation testing device for automotive parts, including a testing box. A testing box base is fixedly connected to the bottom of the testing box, and a rotating groove is formed on one side of the bottom of the testing box base. This invention utilizes the principle that a first nut, during rotation, engages with a screw through a threaded connection, thus tightening. During tightening, the first nut also slides inside a testing block, moving away from the bottom surface of the fixed block. When the first nut is fully tightened, a top block is pushed out by a spring, bringing its bottom surface into contact with the top surface of the first nut. This is observed through a transparent viewing plate to check whether the height of the top surface of the first nut is the same as the height of a preset testing indicator strip and whether the top block has popped out. This process detects the installation of the first nut and prevents situations where the nut cannot be installed properly due to excessive torque.

Description

Technical Field

[0001] This invention belongs to the field of nut installation testing technology, specifically a device for testing the installation of automotive parts nuts. Background Technology

[0002] Nut installation inspection is a critical quality control process that ensures the installation position and tightness of nuts in mechanical equipment meet technical requirements. This process involves various technical means and methods to guarantee the reliability of the connection and the safety of the equipment.

[0003] However, existing automotive parts nut installation testing equipment often has some problems in actual use: First, during the installation process, the bolt needs to pass through the through holes on both parts and be tightened with the nut to achieve assembly. Therefore, the accuracy of the nut's installation position on the part directly affects the overall accuracy after assembly. During installation, the nut's perpendicularity, torque, and wear all affect the installation quality. Traditionally, the tightness of the nut is mainly determined by the torque measured by a torque sensor. However, in actual installation, the nut and bolt may not be tightened due to misalignment during screwing, resulting in the nut not being installed properly due to excessive torque. But if the torque detected by the torque sensor is within the acceptable range, it will be considered that the nut is tightened, which is an error. This reduces the load-bearing capacity between the threads, thereby reducing the stability and safety of the connection. Secondly, the perpendicularity of the nut is not checked after installation, which can easily increase the wear of the nut. Summary of the Invention

[0004] The purpose of this invention is to provide a testing device for the installation of nuts in automotive parts, so as to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, the present invention provides the following technical solution: an automotive parts nut installation testing device, comprising a testing box, a testing box base fixedly connected to the bottom of the testing box, a rotating groove formed on one side of the bottom of the testing box base, a testing block rotatably connected inside the rotating groove, an installation block fixedly connected to one side of the testing block, a spring fixedly connected inside the installation block, a top block fixedly connected to one side of the spring, a first nut provided on one side of the top block, one end of the top block contacting the first nut, the first nut slidably connected to the testing block, a transparent observation plate fixedly connected to one side of the testing block, multiple testing indicator strips fixedly connected to the outer side of the transparent observation plate, and a transmission assembly provided inside the testing box;

[0006] The transmission assembly includes a support block, which is fixedly connected to one side of the inside of the detection box. A drive motor is fixedly connected to the top of the support block. A first rotating shaft is fixedly connected to the output end of the drive motor. A first pulley is fixedly connected to the outside of the first rotating shaft. A second pulley is provided on one side of the first pulley. A belt is sleeved on the outside of the second pulley. The first pulley and the second pulley are connected to each other by the belt. A second rotating shaft is provided inside the second pulley. The second pulley is fixedly connected to the outside of the second rotating shaft. The second rotating shaft is rotatably connected to the detection box.

[0007] Preferably, the transmission assembly further includes a limiting cylinder, which is fixedly connected to the detection box. The limiting cylinder is sleeved on the outside of the second rotating shaft. A spacer block is fixedly connected to the bottom of the second rotating shaft. The spacer block is rotatably connected to the limiting cylinder. A movable rod is provided at the bottom of the spacer block. The movable rod is rotatably connected to the detection box. A slot is provided at the bottom of the spacer block and the top of the movable rod. A pivot block is fixedly connected inside the slot.

[0008] Preferably, the limiting cylinder is fixedly connected to the detection block, a fixing block is fixedly connected inside the detection block, a magnet is slidably connected inside the fixing block, a through groove is opened on one side of the fixing block, a laser emitting head is arranged inside the through groove, and the laser emitting head is fixedly connected to the top of the inside of the detection block.

[0009] Preferably, the transparent observation plate is made of transparent material, and the spacing between the detection indicator bars is 1 mm.

[0010] Preferably, the limiting cylinder has a semi-circular groove corresponding to the belt, the first pulley and the second pulley have the same height and diameter, and the arc of the semi-circular groove is greater than the diameter of the second pulley.

[0011] Preferably, there is a gap between the spacer block and the movable rod, the top and bottom surfaces of the pivot block are respectively in contact with the spacer block and the movable rod, and there are gaps between both sides of the pivot block and the spacer block and the movable rod.

[0012] Preferably, when the top surface of the first nut is in contact with the fixing block, the top block is in contact with the side of the first nut, and when the bottom surface of the first nut is flush with the bottom surface of the detection block, the bottom surface of the top block is in contact with the top surface of the first nut.

[0013] The beneficial effects of this invention are as follows:

[0014] 1. This invention utilizes the first nut, which, during rotation, engages with the screw via a threaded connection, thus tightening it. During tightening, the first nut also slides inside the detection block due to this threaded engagement, moving away from the bottom surface of the fixed block. When the first nut is fully tightened, the top block is pushed out by a spring, bringing its bottom surface into contact with the top surface of the first nut. This is observed through a transparent viewing plate, allowing monitoring of whether the height of the top surface of the first nut matches the height of the preset detection indicator strip and whether the top block pops out. This monitoring of the first nut's installation prevents it from failing to install properly due to excessive torque, thereby improving the screw's load-bearing capacity, connection stability, and safety. Simultaneously, the laser emitting head emits a laser beam, and the verticality is detected by assessing whether the laser can image the ground, reducing thread wear and significantly extending its service life.

[0015] 2. This invention utilizes the staggered arrangement of the movable rod and the pivot block. When the torque reaches a certain level, the drive motor stops. Due to the inertia of the drive motor's rotation, it retains a certain rotational speed after stopping. When this remaining rotational speed is transmitted to the pivot block, the torque has already been reached. At this point, the spacer block cannot continue to drive the movable rod to rotate. The pivot block will continue to rotate and move a distance, increasing the friction with the spacer block and the movable rod, thus better stopping it and preventing the remaining kinetic energy from damaging the first nut or causing damage to automotive parts. Furthermore, when the torque is reached, the friction between the pivot block and both sides can generate sound, thus alerting workers to avoid damage to the parts. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0017] Figure 2 For the present invention Figure 1 Enlarged view of the structure at point A in the middle;

[0018] Figure 3 This is a cross-sectional view of the detection chamber of the present invention;

[0019] Figure 4 This is a cross-sectional schematic diagram of the limiting cylinder structure of the present invention;

[0020] Figure 5 For the present invention Figure 4 Enlarged view of the structure at point B in the middle;

[0021] Figure 6 This is a cross-sectional view of the detection block of the present invention;

[0022] Figure 7 This is a schematic diagram of the detection block of the present invention.

[0023] In the diagram: 1. Detection box; 2. Detection box base; 3. Detection block; 4. Mounting block; 5. Spring; 6. Top block; 7. Nut; 8. Transparent observation plate; 9. Detection indicator strip; 10. Support block; 11. Drive motor; 12. First rotating shaft; 13. First pulley; 14. Second pulley; 15. Belt; 16. Second rotating shaft; 17. Limiting cylinder; 18. Spacer block; 19. Movable rod; 20. Pivot block; 21. Fixing block; 22. Magnet; 23. Laser emitting head; 24. Through slot. Detailed Implementation

[0024] 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 skilled in the art without creative effort are within the scope of protection of the present invention.

[0025] like Figures 1 to 7 As shown, this embodiment of the invention provides a testing device for the installation of nuts on automotive parts, including a testing housing 1. A testing housing base 2 is fixedly connected to the bottom of the testing housing 1. A rotating groove is formed on one side of the bottom of the testing housing base 2. A testing block 3 is rotatably connected inside the rotating groove. An installation block 4 is fixedly connected to one side of the testing block 3. A spring 5 is fixedly connected inside the installation block 4. A top block 6 is fixedly connected to one side of the spring 5. A first nut 7 is provided on one side of the top block 6. One end of the top block 6 contacts the first nut 7. The first nut 7 is slidably connected to the testing block 3. A transparent observation plate 8 is fixedly connected to one side of the testing block 3. Multiple testing indicator strips 9 are fixedly connected to the outer side of the transparent observation plate 8. A transmission assembly is provided inside the testing housing 1. During the rotation of the first nut 7, it engages with the screw through a threaded connection, thereby tightening it. During the tightening of the first nut 7, it will slide inside the detection block 3, thus moving away from the bottom surface of the fixed block 21. When the first nut 7 is fully tightened, the top block 6 will be pushed out by the spring 5, so that the bottom surface of the top block 6 is in contact with the top surface of the first nut 7. At this time, it can be observed through the transparent observation plate 8 to see if the height of the top surface of the first nut 7 is the same as the height of the preset detection indicator bar 9 and whether the top block 6 pops out. This detects the installation of the first nut 7 and avoids the situation where the nut cannot be installed in place due to excessive torque during the installation process, thereby improving the load-bearing capacity of the screw, the stability of the connection and the safety. At the same time, the laser emitting head 23 will emit a laser. By checking whether the laser can image the ground, its verticality can be detected, and thread wear can be reduced, significantly improving its service life.

[0026] The transmission assembly includes a support block 10, which is fixedly connected to one side of the inside of the detection box 1. A drive motor 11 is fixedly connected to the top of the support block 10. A first rotating shaft 12 is fixedly connected to the output end of the drive motor 11. A first pulley 13 is fixedly connected to the outside of the first rotating shaft 12. A second pulley 14 is provided on one side of the first pulley 13. A belt 15 is sleeved on the outside of the second pulley 14. The first pulley 13 and the second pulley 14 are connected to each other through the belt 15. A second rotating shaft 16 is provided inside the second pulley 14. 14 is fixedly connected to the outside of the second rotating shaft 16. The second rotating shaft 16 is rotatably connected to the detection box 1. The transmission assembly also includes a limiting cylinder 17, which is fixedly connected to the detection box 1 and sleeved on the outside of the second rotating shaft 16. A spacer block 18 is fixedly connected to the bottom of the second rotating shaft 16 and rotatably connected to the limiting cylinder 17. A movable rod 19 is provided at the bottom of the spacer block 18 and rotatably connected to the detection box 1. Slots are provided at the bottom of the spacer block 18 and the top of the movable rod 19. A pivot block 20 is fixedly connected to the drive motor 11, which drives the second rotating shaft 16 to rotate. The rotation of the second rotating shaft 16 drives the fixed block 21, magnet 22 and first nut 7 to rotate simultaneously. The rotation of the first nut 7 allows it to be screwed into the screw, avoiding manual screwing and improving work efficiency. Through the staggered arrangement of the movable rod 19 and the pivot block 20, when the torque reaches a certain point, the drive motor 11 stops. Due to the inertia of the drive motor 11, it will still have a certain rotational speed after stopping. When the remaining rotational speed is transmitted to the pivot block 20, the torque has been reached. At this point, the rotation of the spacer block 18 can no longer drive the movable rod 19 to rotate. The pivot block 20 will continue to rotate and move a distance, increasing the friction with the spacer block 18 and the movable rod 19, thus better stopping it and preventing the remaining kinetic energy from damaging the first nut 7 and causing damage to the automotive parts. In addition, when the torque is reached, the friction between the pivot block 20 and the two sides can produce a sound, thus warning the workers to avoid damage to the parts.

[0027] The limiting cylinder 17 is fixedly connected to the detection block 3. The detection block 3 is fixedly connected to the fixing block 21. The fixing block 21 is slidably connected to the magnet 22. A through groove 24 is opened on one side of the fixing block 21. A laser emitting head 23 is set inside the through groove 24. The laser emitting head 23 is fixedly connected to the top of the inside of the detection block 3. After the magnet 22 is set, it can attract the first nut 7 and position the first nut 7. The detection block 3 and the first nut 7 are both set vertically. The first nut 7, the fixing block 21 and the magnet 22 are all opened in the middle to accommodate the screw. This can further prevent the first nut 7 from shifting during the screwing process and improve the verticality of the first nut 7 during installation.

[0028] Among them, the transparent observation plate 8 is made of transparent material, and the multiple detection indicator bars 9 are spaced 1mm apart. The 1mm spacing is used to facilitate the observation of the error of the first nut 7 during the installation process and improve its detection accuracy.

[0029] There is a gap between the spacer block 18 and the movable rod 19. The top and bottom surfaces of the pivot block 20 are in contact with the spacer block 18 and the movable rod 19, respectively. There are gaps between both sides of the pivot block 20 and the spacer block 18 and the movable rod 19. The limiting cylinder 17 has a semi-circular groove corresponding to the belt 15. The first pulley 13 and the second pulley 14 have the same height and diameter. The arc of the semi-circular groove is larger than the diameter of the second pulley 14. The gap between the spacer block 18 and the movable rod 19 allows for a certain amount of buffering during movement, preventing the remaining kinetic energy from damaging the first nut 7 and causing damage to the automotive parts.

[0030] When the top surface of the first nut 7 is in contact with the fixing block 21, the top block 6 is in contact with the side of the first nut 7. When the bottom surface of the first nut 7 is flush with the bottom surface of the detection block 3, the bottom surface of the top block 6 is in contact with the top surface of the first nut 7. This makes the detection of the first nut 7 when it is fully tightened more intuitive and avoids the situation where the nut cannot be installed in place due to excessive torque during the installation process.

[0031] Working principle:

[0032] During operation, the first nut 7 is inserted from the bottom of the detection block 3. At this time, the spring 5 is in the ejected state. Since both sides of the spring 5 are provided with inclined surfaces, when the first nut 7 is pressed in, the top block 6 can be easily pushed open so that the top block 6 is in contact with the side of the first nut 7. When the first nut 7 is pressed into the detection block 3, it is attracted to the magnet 22 inside the fixing block 21, fixing the first nut 7 to the bottom of the fixing block 21. At the same time, the screw is passed out from the part that needs to be fixed and pre-tightened with the first nut 7.

[0033] At this time, the drive motor 11 is started, which drives the first rotating shaft 12 to rotate. The rotation of the first rotating shaft 12 drives the first pulley 13, the second pulley 14, and the belt 15 to rotate. The rotation of the second pulley 14 drives the drive motor 11 to start, and the rotation of the second rotating shaft 16 drives the spacer block 18 to rotate. The rotation of the spacer block 18 drives the pivot block 20 to rotate. Through the staggered arrangement of the movable rod 19 and the pivot block 20, when the torque reaches a certain level, the drive motor 11 stops. Due to the inertia of the rotation of the drive motor 11, it will still have a certain rotational speed after stopping. When the remaining rotational speed is transmitted to the pivot block 20, the torque has been reached, and the spacer block 18 rotates. If the movable rod 19 cannot continue to rotate, the pivot block 20 will continue to rotate and move a distance, increasing the friction with the spacer block 18 and the movable rod 19, thus stopping it better and preventing the remaining kinetic energy from damaging the first nut 7 and causing damage to the automotive parts. When the torque is reached, the friction between the pivot block 20 and both sides can produce a sound, thus warning the staff to avoid damage to the parts. The rotation of the pivot block 20 drives the movable rod 19 to rotate, the rotation of the movable rod 19 drives the detection block 3 to rotate, and the rotation of the detection block 3 drives the fixing block 21, the magnet 22 and the first nut 7 to rotate simultaneously. The rotation of the first nut 7 allows the first nut 7 to be screwed into the screw, avoiding manual screwing and improving work efficiency.

[0034] After screwing in, the first nut 7 will engage with the screw during rotation, thus tightening it. During the tightening process, the first nut 7 will also slide inside the detection block 3, moving away from the bottom surface of the fixing block 21. When the first nut 7 is fully tightened, the top block 6 will be pushed out by the spring 5, so that the bottom surface of the top block 6 contacts the top surface of the first nut 7. At this time, the top surface height of the first nut 7 is observed through the transparent observation plate 8 to check whether the height of the top surface of the first nut 7 is the same as the height of the preset detection indicator bar 9 and whether the top block 6 pops out. This checks the installation of the first nut 7 to prevent the nut from not being installed in place due to excessive torque, thereby improving the load-bearing capacity of the screw, the stability of the connection, and the safety. At the same time, the laser emitting head 23 will emit a laser. By checking whether the laser can image the ground, the verticality is detected, reducing thread wear and extending its service life.

[0035] 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 process, method, article, or apparatus.

[0036] 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 testing device for the installation of nuts on automotive parts, comprising a testing housing (1), wherein a testing housing base (2) is fixedly connected to the bottom of the testing housing (1), and a rotating groove is provided on one side of the bottom of the testing housing base (2), characterized in that: A detection block (3) is rotatably connected inside the rotating groove. A mounting block (4) is fixedly connected to one side of the detection block (3). A spring (5) is fixedly connected inside the mounting block (4). A top block (6) is fixedly connected to one side of the spring (5). A first nut (7) is provided on one side of the top block (6). One end of the top block (6) is in contact with the first nut (7). The first nut (7) is slidably connected to the detection block (3). A transparent observation plate (8) is fixedly connected to one side of the detection block (3). Multiple detection indicator strips (9) are fixedly connected to the outside of the transparent observation plate (8). A transmission assembly is provided inside the detection box (1). The transmission assembly includes a support block (10), which is fixedly connected to one side of the inside of the detection box (1). A drive motor (11) is fixedly connected to the top of the support block (10). A first rotating shaft (12) is fixedly connected to the output end of the drive motor (11). A first pulley (13) is fixedly connected to the outside of the first rotating shaft (12). A second pulley (14) is provided on one side of the first pulley (13). A belt (15) is sleeved on the outside of the second pulley (14). The first pulley (13) and the second pulley (14) are connected to each other through the belt (15). A second rotating shaft (16) is provided inside the second pulley (14). The second pulley (14) is fixedly connected to... Outside the second rotating shaft (16), the second rotating shaft (16) is rotatably connected to the detection box (1). The transmission assembly also includes a limiting cylinder (17), which is fixedly connected to the detection box (1). The limiting cylinder (17) is sleeved on the outside of the second rotating shaft (16). A spacer block (18) is fixedly connected to the bottom of the second rotating shaft (16). The spacer block (18) is rotatably connected to the limiting cylinder (17). A movable rod (19) is provided at the bottom of the spacer block (18). A slot is provided at the bottom of the spacer block (18) and the top of the movable rod (19). The movable rod (19) is rotatably connected to the detection box (1). A pivot block (20) is fixedly connected inside the slot. The limiting cylinder (17) is fixedly connected to the detection block (3). A fixing block (21) is fixedly connected inside the detection block (3). A magnet (22) is slidably connected inside the fixing block (21). A through groove (24) is opened on one side of the fixing block (21). A laser emitting head (23) is set inside the through groove (24). The laser emitting head (23) is fixedly connected to the top of the inside of the detection block (3).

2. The apparatus for detecting installation of a nut of an automobile part according to claim 1, characterized by: The transparent observation plate (8) is made of transparent material, and the detection indicator strips (9) are spaced 1 mm apart.

3. The apparatus for detecting installation of a nut of an automobile part according to claim 2, characterized in that: The limiting cylinder (17) has a semi-circular groove corresponding to the belt (15). The first pulley (13) and the second pulley (14) have the same height and diameter. The arc of the semi-circular groove is greater than the diameter of the second pulley (14).

4. The apparatus for detecting installation of a nut of an automobile part according to claim 3, characterized in that: There is a gap between the spacer block (18) and the movable rod (19). The top and bottom surfaces of the pivot block (20) are in contact with the spacer block (18) and the movable rod (19) respectively. There are gaps between the pivot block (20) and the spacer block (18) and the movable rod (19) on both sides.

5. The apparatus for detecting installation of a nut of an automobile part according to claim 4, characterized in that: When the top surface of the first nut (7) is in contact with the fixing block (21), the top block (6) is in contact with the side of the first nut (7). When the bottom surface of the first nut (7) is flush with the bottom surface of the detection block (3), the bottom surface of the top block (6) is in contact with the top surface of the first nut (7).

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