Nut inner thread quality inspection machine facilitating mold replacement

Abstract

The utility model relates to a nut inner thread quality inspection machine convenient to replace mould relates to nut quality inspection technical field, including frame, rotatable setting three -jaw chuck on the frame and setting installation platform in three -jaw chuck top, three -jaw chuck have the clamping space of standard screw clamping, the driving element that the installation platform is equipped with to three -jaw chuck can go up and down on the frame, the corresponding place of clamping space on installation platform is equipped with the locating space, this locating space and clamping space coaxial arrangement, its characterized in that: the locating space is equipped with the nut fixed part of detachable replacement with this locating space, when the nut fixed part is in locating space, and there is the peripheral limit component between the nut fixed part and locating space, the placing space that the nut fixed part is opened has and is placed for detecting nut. The utility model discloses through the nut fixed part, according to the size of different specifications nut and customizes, ensure that the nut fixed part and nut are completely matched in the detection process, avoid frequent dismounting and mounting mould.

Description

Technical Field

[0001] This application relates to the field of nut quality inspection technology, and in particular to a nut internal thread quality inspection machine that is easy to change molds. Background Technology

[0002] The nut internal thread quality inspection machine is an automated testing device specifically designed to quickly and accurately determine whether the internal thread of a nut meets the standard requirements. Its core principle is based on go / no-go gauge testing technology. Through the cooperation of mechanical structure and sensors, it replaces the traditional manual inspection method. A single machine can replace 4-6 workers, with a testing cycle of 30-50 pieces per minute. It supports 24-hour continuous operation and significantly shortens the production cycle.

[0003] Existing nut internal thread quality inspection machines require removing the fixing screws and replacing the mold of the corresponding specification when inspecting whether the internal threads of nuts of different sizes meet the standards. Each time the mold is replaced, the fixing screws need to be removed, the mold needs to be replaced, and recalibrated. The whole process is time-consuming. At the same time, frequent disassembly and assembly can cause wear on the positioning reference surface of the mold. After long-term use, the repeatability of the inspection decreases by more than 30%, which can easily lead to errors.

[0004] Therefore, it is necessary to propose a quality inspection machine for the internal threads of nuts that is easy to change molds to solve the above problems. Utility Model Content

[0005] This application provides a quality inspection machine for the internal threads of nuts that facilitates mold replacement, in order to improve the technical problems of frequent mold disassembly and assembly, which cause wear and time consumption in related technologies.

[0006] This application provides a nut internal thread quality inspection machine that facilitates mold replacement, including a frame, a three-jaw chuck rotatably mounted on the frame, and a mounting platform above the three-jaw chuck. The three-jaw chuck has a clamping space for clamping standard screws. The frame is provided with a drive component that allows the mounting platform to move up and down towards the three-jaw chuck. A positioning space is provided on the mounting platform at a corresponding position to the clamping space. The positioning space is coaxially arranged with the clamping space. The positioning space is characterized by having a nut fixing component that is detachably replaceable within the positioning space. When the nut fixing component is within the positioning space, a circumferential limiting component is provided between it and the positioning space. The nut fixing component has a placement space for placing the nut to be inspected.

[0007] The technical solutions described above in this application embodiment have at least the following technical effects: During the process of using a quality inspection machine to inspect the internal threads of a nut, a nut fastener that matches the size of the nut is placed in the positioning space on the mounting table. The nut fastener is customized according to the size of different nut specifications to ensure that the nut fastener and the nut are completely matched during the inspection process, avoiding frequent disassembly and assembly of the mold, which would reduce efficiency.

[0008] In this embodiment, the circumferential limiting component includes at least one first limiting surface disposed on the side wall of the positioning space and at least one second limiting surface disposed on the outer circumferential surface of the nut fastener that matches the limiting surface.

[0009] This technical solution uses the first and second limiting surfaces on the nut fastener to limit its circumferential direction. The sidewall of the positioning space can be an internal hexagonal shape, and the outer circumferential surface of the nut fastener can be an external hexagonal shape. This avoids inaccurate test results caused by misalignment during the internal thread testing process. The tight fit between the nut fastener and the fixing ring can effectively prevent circumferential or radial misalignment during the testing process, ensuring the accuracy of the test results.

[0010] In this embodiment, the circumferential limiting component includes at least one limiting groove formed on the side wall along the circumferential direction of the positioning space and at least one limiting protrusion corresponding to the limiting groove on the outer circumferential surface of the nut fastener.

[0011] This technical solution uses the limiting groove and limiting protrusion on the nut fastener to limit the nut fastener in its circumferential direction. Multiple positioning protrusions can be evenly distributed on the outer circumferential surface of the nut fastener, avoiding misalignment during the internal thread inspection process and thus preventing inaccurate test results. The tight fit between the nut fastener and the fixing ring can effectively prevent circumferential or radial misalignment during the inspection process, ensuring the accuracy of the test results.

[0012] In this embodiment, the mounting platform includes a lifting platform mounted on a frame and a nut detection plate that is detached from the lifting platform by fasteners. The nut detection plate is provided with an annular fixing ring at the corresponding position of the clamping space, and the positioning space is opened on the fixing ring.

[0013] With this technical solution, during normal use, the nut fastener can be removed from the retaining ring. After long-term use and wear, the nut can also be removed from the inspection plate.

[0014] In this embodiment, the fixing ring is provided with a quick-release assembly for easy assembly and disassembly of the nut fastener. The quick-release assembly includes a connecting shell disposed on the fixing ring, the connecting shell having a connecting groove; an abutment block movably disposed in the connecting groove, the outer end of the abutment block having an abutment slope, and an abutment spring disposed on the inner wall of the connecting groove, the other end of the abutment spring abutting against the inner end of the abutment block.

[0015] This technical solution allows for the installation of the nut fastener on the connecting housing. By pressing the nut fastener against the abutment bevel on the abutment block, the abutment block compresses the abutment spring. After the nut fastener and the retaining ring are assembled, the abutment spring rebounds the abutment block, which then abuts against the top of the nut fastener, restricting its vertical movement. The abutment block engages with the nut fastener through the abutment bevel and, under the action of the spring, firmly abuts against the top of the nut fastener, effectively preventing circumferential movement or jump of the nut fastener during testing and ensuring precise alignment between the nut fastener and the nut's internal thread during testing. In this embodiment, an abutting inclined groove is provided in the middle of the abutting block, and a transmission hole is provided in the connecting shell at the position corresponding to the abutting inclined groove. A transmission rod is movably arranged through the transmission hole, and a pressing plate is provided on the end of the transmission rod away from the abutting inclined groove.

[0016] With this technical solution, when it is necessary to replace the nut fastener, the force is transmitted to the inclined groove by pressing the pressing plate and the transmission rod, which drives the abutment block to compress the abutment spring, thereby releasing the restriction on the nut fastener. The disassembly can be completed by pressing the pressing plate. The operation is simple and does not require complicated tools or steps.

[0017] In this embodiment, a placement groove is provided at the bottom of the nut fixing member corresponding to the position of the mounting platform, and a rebound spring is provided in the placement groove, with the other end of the rebound spring abutting against the bottom of the nut fixing member.

[0018] This technical solution allows the nut fastener to be pushed out by a spring after the restriction on it is removed, making it easy to disassemble and remove.

[0019] In this embodiment, classification and placement boxes are provided on both ends of the rack.

[0020] This technical solution allows qualified and unqualified nuts to be classified and placed separately. The sides of the rack are usually underutilized areas. Setting up classification boxes can transform these idle spaces into practical storage spaces and improve the overall space utilization rate.

[0021] In this embodiment, the driving component includes a first lead screw and a second lead screw rotatably mounted on the frame, and the first lead screw and the second lead screw are driven to rotate by the frame.

[0022] This technical solution, through synchronous drive using a dual lead screw design, effectively reduces motion errors caused by uneven force or wear on a single lead screw, thereby improving motion accuracy and stability.

[0023] In this embodiment, a control unit is provided on the frame to control the rotation of the first lead screw and the second lead screw.

[0024] This technical solution utilizes a digital control system to receive and execute high-precision digital commands. By precisely controlling the rotation angles and speeds of the first and second lead screws, it achieves high-precision positioning and motion control of the digital drive components. Attached Figure Description

[0025] Figure 1 A three-dimensional structural diagram of a nut internal thread quality inspection machine that facilitates mold replacement, provided in an embodiment of this application; Figure 2 A three-dimensional structural diagram of the mounting platform provided in the embodiments of this application; Figure 3 Exploded view of the mounting platform provided in the embodiments of this application Figure 1 ; Figure 4 Exploded view of the mounting platform provided in the embodiments of this application Figure 2 ; Figure 5 A cross-sectional structural diagram of the mounting platform provided in an embodiment of this application; Figure 6 for Figure 5 Enlarged view of point A in the middle; Figure 7 This is an exploded structural diagram of the quick-release assembly provided in the embodiments of this application.

[0026] The following are the labeling elements in the figure: 1. Frame; 11. Three-jaw chuck; 12. Standard bolts; 13. Mounting platform; 131. Lifting platform; 132. Nut detection plate; 14. Drive unit; 141. First lead screw; 142. Second lead screw; 2. Mold mechanism; 21. Fixing ring; 22. Nut fixing component; 23. Circumferential limiting assembly; 231. Limiting protrusion; 232. Limiting groove; 233. First limiting surface; 234. Second limiting surface; 3. Quick release assembly; 31. Connecting shell; 32. Connecting groove; 33. Abutting block; 34. Abutting slope; 35. Abutting spring; 36. Abutting slope groove; 37. Transmission hole; 38. Transmission rod; 39. Pressing plate; 4. Placement groove; 41. Rebound spring; 5. Categorized placement box; 6. Number control unit. Detailed Implementation

[0027] In order to improve the technical problems of frequent mold disassembly and assembly in related technologies, which cause wear and time consumption, the embodiments of this application provide the following solutions.

[0028] Please refer to the following: Figures 1 to 7This application provides a quality inspection machine for internal threads of nuts that facilitates mold replacement. The quality inspection machine for internal threads of nuts that facilitates mold replacement includes a frame 1, a three-jaw chuck 11 rotatably mounted on the frame 1, and a mounting platform 13 mounted above the three-jaw chuck 11. The three-jaw chuck 11 has a clamping space for clamping standard screws. The frame 1 is provided with a drive component 14 that allows the mounting platform 13 to move up and down toward the three-jaw chuck 11. The mounting platform 13 has a positioning space located at the corresponding position of the clamping space. The positioning space is coaxially arranged with the clamping space. The feature is that a nut fixing component 22 that is detachable and replaceable with the positioning space is provided in the positioning space. When the nut fixing component 22 is in the positioning space, a circumferential limiting component 23 is provided between the nut fixing component 22 and the positioning space. The nut fixing component 22 has a placement space for placing the nut to be inspected.

[0029] The nut internal thread quality inspection machine provided in this embodiment facilitates mold replacement. During the quality inspection of nut internal threads, a nut fixing component 22, conforming to the nut's size, is placed in the positioning space on the mounting table 13. The nut fixing component 22 is customized according to the dimensions of different nut specifications, ensuring a perfect match between the nut fixing component 22 and the nut during inspection. This avoids frequent mold disassembly and assembly, preventing reduced efficiency. Thus, because the nut fixing component 22 is customized for different nut specifications, the quality inspection machine can quickly adapt to different nut sizes without frequent disassembly and assembly of different molds, reducing the time required for mold changes and thereby improving inspection efficiency.

[0030] In this embodiment, the circumferential limiting component 23 includes at least one first limiting surface 233 disposed on the side wall of the positioning space and at least one second limiting surface 234 disposed on the outer circumferential surface of the nut fastener 22 that matches the limiting surface.

[0031] With this configuration, the nut fastener 22 is limited in its circumferential direction by the first limiting surface 233 and the second limiting surface 234 on the nut fastener 22. The side wall of the positioning space can be an inner hexagonal shape, and the outer circumferential surface of the nut fastener 22 can be an outer hexagonal shape. This avoids inaccurate test results caused by misalignment during the internal thread test. The tight fit between the nut fastener 22 and the fixing ring 21 can effectively prevent circumferential or radial misalignment during the test, ensuring the accuracy of the test results.

[0032] In this embodiment, the circumferential limiting component 23 includes at least one limiting groove 232 opened on the side wall along the circumferential direction of the positioning space and at least one limiting protrusion 231 corresponding to the limiting groove 232 on the outer circumferential surface of the nut fastener 22.

[0033] With this configuration, the nut fastener 22 is limited in its circumferential direction by the limiting groove 232 and the limiting protrusion 231 on the nut fastener 22. This allows multiple positioning protrusions to be evenly distributed on the outer circumferential surface of the nut fastener 22, avoiding inaccurate test results caused by misalignment during the internal thread test. The tight fit between the nut fastener 22 and the fixing ring 21 can effectively prevent circumferential or radial misalignment during the test, ensuring the accuracy of the test results.

[0034] In this embodiment, the mounting platform 13 includes a lifting platform 131 mounted on the frame 1 and a nut detection plate 132 that is detached from the lifting platform 131 by fasteners. The nut detection plate 132 is provided with an annular fixing ring 21 at the corresponding position of the clamping space, and the positioning space is opened on the fixing ring 21.

[0035] With this setup, during normal use, the nut fixing part 22 can be removed from the fixing ring 21. After long-term use and wear, the nut can also be removed from the inspection plate.

[0036] In this embodiment, the fixing ring 21 is provided with a quick-release assembly 3 for easy assembly and disassembly of the nut fastener 22. The quick-release assembly 3 includes a connecting shell 31 provided on the fixing ring 21, and a connecting groove 32 provided on the connecting shell 31; an abutment block 33 movably disposed in the connecting groove 32, an abutment slope 34 provided on the outer end of the abutment block 33, an abutment spring 35 provided on the inner wall of the connecting groove 32, and the other end of the abutment spring 35 abutting against the inner end of the abutment block 33.

[0037] With this configuration, when the nut fastener 22 is installed on the connecting housing 31, the nut fastener 22 is pressed down against the abutment slope 34 on the abutment block 33, which in turn compresses the abutment spring 35. After the nut fastener 22 and the retaining ring 21 are assembled, the abutment spring 35 rebounds the abutment block 33, which abuts against the top of the nut fastener 22, restricting the vertical movement of the nut fastener 22. The abutment block 33 cooperates with the nut fastener 22 through the abutment slope 34 and is firmly abutted against the top of the nut fastener 22 under the action of the spring, effectively preventing the nut fastener 22 from circumferentially moving or jumping during the testing process, and ensuring the precise alignment of the nut fastener 22 with the nut's internal thread during the testing process. Thus, the abutting block 33 engages with the nut fixing member 22 through the abutting inclined surface 34, and is firmly abutted against the nut fixing member 22 under the action of the spring, forming a mechanical hard limit, strictly controlling the circumferential displacement of the nut fixing member 22 within a very small range, and ensuring the precise alignment of the nut fixing member 22 with the nut internal thread during the testing process.

[0038] In this embodiment, an abutting inclined groove 36 is provided in the middle of the abutting block 33, and a transmission hole 37 is provided in the connecting shell 31 at the position corresponding to the abutting inclined groove 36. A transmission rod 38 is movably arranged through the transmission hole 37, and a pressing plate 39 is provided on the end of the transmission rod 38 away from the abutting inclined groove 36.

[0039] With this design, when the nut fastener 22 needs to be replaced, pressing the pressing plate 39 transmits force to the inclined groove via the transmission rod 38, causing the abutment block 33 to compress the abutment spring 35, thus releasing the restriction on the nut fastener 22. Disassembly can then be completed simply by pressing the pressing plate 39, making the operation simple and requiring no complicated tools or steps. This design of the pressing plate 39 makes the disassembly process quick and smooth, reducing the time required to replace the nut fastener 22. This is especially important for production lines that require frequent mold or nut fastener 22 changes, improving production efficiency.

[0040] In this embodiment, a placement groove 4 is provided at the bottom of the nut fixing member 22 corresponding to the position of the mounting platform 13. A rebound spring 41 is provided in the placement groove 4, and the other end of the rebound spring 41 abuts against the bottom of the nut fixing member 22.

[0041] With this configuration, after the restriction on the nut fastener 22 is lifted, the nut fastener 22 is pushed out by the return spring 41, making it easy to disassemble and remove.

[0042] In this embodiment, classification boxes 5 are provided on both ends of the rack 1.

[0043] This setup allows for the categorization and placement of qualified and unqualified nuts. The sides and ends of rack 1 are typically underutilized areas; the categorization boxes 5 transform these unused spaces into usable storage, improving overall space utilization. Furthermore, placing qualified and unqualified nuts in separate categorization boxes reduces operator time spent on sorting and organizing, thus increasing work efficiency.

[0044] In this embodiment, the driving component 14 includes a first lead screw 141 and a second lead screw 142 rotatably mounted on the frame 1, and the first lead screw 141 and the second lead screw 142 are driven to rotate by the frame 1.

[0045] This configuration, through synchronous drive using a dual-screw design, effectively reduces motion errors caused by uneven force or wear on a single screw, improving motion accuracy and stability. Furthermore, the dual-screw design ensures the load is evenly distributed across the two screws, preventing deformation or displacement of a single screw due to uneven force, thereby improving the overall motion accuracy and consistency.

[0046] In this embodiment, a control unit 6 is provided on the frame 1 to control the rotation of the first lead screw 141 and the second lead screw 142.

[0047] With this configuration, the CNC control unit 6 can receive and execute high-precision digital commands. By precisely controlling the rotation angle and speed of the first lead screw 141 and the second lead screw 142, high-precision positioning and motion control of the digital drive component 14 can be achieved. Thus, the CNC system can achieve automated operation, reducing the need for manual intervention and improving production efficiency.

[0048] The implementation principle of the nut internal thread quality inspection machine that facilitates mold replacement provided in this application embodiment is as follows: During the quality inspection of the nut internal thread using the quality inspection machine, a nut fixing part 22 that conforms to the size of the nut is placed inside the fixing ring 21. The nut fixing part 22 is customized according to the size of different nut specifications to ensure that the nut fixing part 22 and the nut are completely matched during the inspection process. The nut fixing part 22 is limited in its circumferential direction by the limiting protrusion 231 and the limiting groove 232 on the nut fixing part 22. When the nut fixing part 22 is installed on the connecting housing 31, the nut fixing part 22 is pressed down against the abutting inclined surface 34 on the abutting block 33, which drives the abutting block 33 to compress the abutting spring 35. After the nut fixing part 22 and the fixing ring 21 are assembled, the abutting spring 35 rebounds the abutting block 35. 3. The abutment block 33 abuts against the nut fixing member 22 above, restricting the vertical movement of the nut fixing member 22. The abutment block 33 cooperates with the nut fixing member 22 through the abutment inclined surface 34 and is firmly abutted against the nut fixing member 22 under the action of the spring. When the nut fixing member 22 needs to be replaced, the force is transmitted to the inclined groove through the transmission rod 38 by pressing the pressing plate 39, which drives the abutment block 33 to compress the abutment spring 35, thereby releasing the restriction on the nut fixing member 22. After the restriction on the nut fixing member 22 is released, the nut fixing member 22 is pushed out by the return spring 41, which is convenient for disassembly and removal. The qualified and unqualified nuts are classified and placed in the classification and placement box 5. The digital control 6 can receive and execute high-precision digital instructions and is synchronously driven by the double lead screw design.

[0049] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A nut internal thread quality inspection machine that facilitates mold replacement, comprising a frame (1), a three-jaw chuck (11) rotatably mounted on the frame (1), and a mounting platform (13) mounted above the three-jaw chuck (11), wherein the three-jaw chuck (11) has a clamping space for clamping a standard screw, the frame (1) is provided with a drive component (14) for the mounting platform (13) to move up and down toward the three-jaw chuck (11), and the mounting platform (13) is provided with a positioning space at a corresponding position of the clamping space, the positioning space being coaxially arranged with the clamping space, characterized in that: The positioning space is provided with a nut fastener (22) that can be detached and replaced with the positioning space. When the nut fastener (22) is in the positioning space, a circumferential limiting component (23) is provided between it and the positioning space. The nut fastener (22) is provided with a placement space for placing the test nut.

2. The nut internal thread quality inspection machine with easy mold replacement according to claim 1, characterized in that: The circumferential limiting component (23) includes at least one first limiting surface (233) disposed on the side wall of the positioning space and at least one second limiting surface (234) disposed on the outer circumferential surface of the nut fastener (22) that matches the first limiting surface.

3. The nut internal thread quality inspection machine with easy mold replacement according to claim 1, characterized in that: The circumferential limiting component (23) includes at least one limiting groove (232) opened on the side wall along the circumferential direction of the positioning space and at least one limiting protrusion (231) on the outer circumferential surface of the nut fastener (22) corresponding to the limiting groove (232).

4. The nut internal thread quality inspection machine with easy mold replacement according to claim 1 or 2, characterized in that: The mounting platform (13) includes a lifting platform (131) mounted on the frame (1) and a nut detection plate (132) that is detached from the lifting platform (131) by fasteners. The detection plate is provided with an annular fixing ring (21) at the corresponding position of the clamping space. The positioning space is opened on the fixing ring (21).

5. The nut internal thread quality inspection machine with easy mold replacement according to claim 4, characterized in that: The fixing ring (21) is provided with a quick-release assembly (3) for easy assembly and disassembly of the nut fastener (22). The quick-release assembly (3) includes a connecting shell (31) provided on the fixing ring (21), and a connecting groove (32) provided on the connecting shell (31); an abutment block (33) movably disposed in the connecting groove (32), an abutment slope (34) provided on the outer end of the abutment block (33), an abutment spring (35) provided on the inner wall of the connecting groove (32), and the other end of the abutment spring (35) abutting against the inner end of the abutment block (33).

6. The nut internal thread quality inspection machine with easy mold replacement according to claim 5, characterized in that: The abutting block (33) has an abutting inclined groove (36) in the middle. The connecting shell (31) has a transmission hole (37) at the position corresponding to the abutting inclined groove (36). A transmission rod (38) is movably arranged through the transmission hole (37). A pressing plate (39) is provided on the end of the transmission rod (38) away from the abutting inclined groove (36).

7. A nut internal thread quality inspection machine that facilitates mold replacement according to any one of claims 1, 2, 5, or 6, characterized in that: The bottom of the nut fastener (22) is provided with a placement groove (4) corresponding to the position of the mounting platform (13). A rebound spring (41) is provided in the placement groove (4), and the other end of the rebound spring (41) abuts against the bottom of the nut fastener (22).

8. A nut internal thread quality inspection machine with easy mold replacement according to claim 1, 2, 5, or 6, characterized in that: The rack (1) has classification boxes (5) on both sides.

9. A nut internal thread quality inspection machine with easy mold replacement according to claim 1, 2, 5, or 6, characterized in that: The driving component (14) includes a first lead screw (141) and a second lead screw (142) rotatably mounted on the frame (1), and the first lead screw (141) and the second lead screw (142) are driven to rotate by the frame (1).

10. A nut internal thread quality inspection machine with easy mold replacement according to claim 1, 2, 5, or 6, characterized in that: The frame (1) is equipped with a control unit (6) to control the rotation of the first lead screw (141) and the second lead screw (142).

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