Nut external dimension and internal thread detection equipment

Abstract

The utility model provides nut external dimension and internal thread detection equipment. The nut external dimension and internal thread detection equipment comprises a nut feeding device, a nut directional screening device, a nut internal thread detection device and a nut discharging device, the nut feeding device comprises a material frame, a material ejecting mechanism and a transverse conveying mechanism, a containing groove is formed in the material frame, a feeding port and a discharging port are formed in the material frame, the material ejecting mechanism is installed in the material frame, and the discharging port of the material frame is connected with the feeding end of the transverse conveying mechanism. The nut directional screening device is connected with the transverse conveying mechanism; the nut internal thread detection device comprises a base, a supporting material frame and a nut internal thread detection mechanism. And the nut discharging device is mounted on the base. The equipment can quickly and automatically detect and screen a large batch of nuts, replaces manual detection, and improves the detection efficiency and quality.

Description

Technical Field

[0001] The utility model relates to the technical field of nut detection, in particular to a device for detecting the outer dimensions and internal threads of a nut. Background Art

[0002] Nuts are parts that tightly connect mechanical equipment. Only nuts and bolts of the same specifications can be connected together through the inner threads. The precision requirements of the inner threads of nuts are relatively high. If the inner threads are not processed in place, they will not be able to connect with the screws correctly. The existing methods of detecting the inner threads of nuts mostly rely on manual work. By manually screwing a go / no-go gauge into the threaded hole of the nut to detect whether the inner threads of the nut are processed in place, it is not only time-consuming and labor-intensive, but also inefficient and cannot quickly detect and screen large quantities of nuts. Figure 1 The nut 10 shown has an inner hole 101 with different inner diameters at both ends. The inner hole 101 needs to be set in a predetermined direction with the large end facing upward and the small end facing downward, that is, the internal thread of the nut can only be inspected after orientation. Traditional manual inspection seriously reduces the inspection efficiency and quality. Utility Model Content

[0003] The technical problem to be solved by the present invention is that the existing method of detecting the internal threads of nuts mostly relies on manual work, which is not only time-consuming and labor-intensive, but also inefficient and unable to quickly detect and screen large quantities of nuts. In order to overcome the above defects of the existing technology, the present invention provides a nut outer size and internal thread detection device.

[0004] The utility model provides a nut outer size and internal thread detection device, comprising a nut feeding device, a nut directional screening device, a nut internal thread detection device and a nut discharging device; the nut feeding device comprises a material frame, a feeding mechanism and a transverse conveying mechanism, the material frame is provided with a receiving groove for accommodating nuts, the material frame is provided with a feeding port and a discharging port connected to the receiving groove, the feeding mechanism is installed inside the material frame and is used to discharge the nuts in the receiving groove from the discharging port, the discharging port of the material frame is connected to the feeding end of the transverse conveying mechanism, and the transverse conveying mechanism is used to convey the nuts discharged from the discharging port to the nut internal thread detection device; the nut directional screening device is connected to the transverse conveying mechanism, and the nut directional screening device is used to screen out nuts arranged along a predetermined direction on the transverse conveying mechanism; the nut internal thread detection device The device includes a base, a supporting material rack and a nut internal thread detection mechanism, the supporting material rack is installed on the base, a material trough is provided on the supporting material rack, an inlet connected to the material trough is provided at the front end of the supporting material rack, the inlet of the supporting material rack is connected to the discharging end of the horizontal conveying mechanism, and a first outlet and a second outlet connected to the material trough are provided at the rear end of the supporting material rack, the nut internal thread detection mechanism is installed on the base and arranged close to the supporting material rack, the nut internal thread detection mechanism is used to detect the internal thread of the nut in the material trough; the nut discharging device is installed on the base, when the internal thread detected by the nut internal thread detection mechanism is qualified, the nut discharging device discharges the nuts in the material trough from the first outlet; when the internal thread detected by the nut internal thread detection mechanism is unqualified, the nut discharging device discharges the nuts in the material trough from the second outlet.

[0005] Compared with the prior art, the nut outer size and internal thread detection device disclosed in the present application has the following advantages: by setting a nut feeding device, the pushing mechanism discharges the nuts in the accommodating groove from the discharge port, and the transverse conveying mechanism conveys the discharged nuts to the nut detection device, thereby realizing automatic loading of nuts; by setting a nut directional screening device, the nuts arranged along a predetermined direction are screened out on the transverse conveying mechanism, which is beneficial to the subsequent internal thread detection of the nuts; by setting a nut internal thread detection device, the supporting material rack is used to support the nuts, and its material trough enables the nuts to be stably set, and the nut internal thread detection mechanism realizes automatic detection of the internal thread of the nut; by setting a nut discharging device, nuts with qualified internal threads and unqualified internal threads are automatically sorted out, thereby replacing manual nut internal thread detection with this device, thereby improving detection efficiency.

[0006] In a possible embodiment, the ejecting mechanism includes a ejecting block and a ejecting driver, the ejecting driver is fixedly installed in the material frame, the output end of the ejecting driver is connected to the ejecting block, the ejecting block is located in the receiving groove and is moved toward the discharge port to discharge the nuts in the receiving groove from the discharge port, and a guide plate is provided at the discharge port toward the horizontal conveying mechanism.

[0007] Compared with the existing technology, the above technical solution can transfer the nuts in the accommodating groove to the horizontal conveying mechanism, automatically load the nuts, and improve the loading efficiency and reliability.

[0008] In a possible embodiment, the transverse conveying mechanism includes a support frame and a pulley conveying structure. The support frame is installed on the material frame, and the pulley conveying structure is installed on the support frame. The front side of the conveying belt of the pulley conveying structure is located directly below the guide plate.

[0009] Compared with the existing technology, the above technical solution can realize the lateral transportation and movement of nuts, and the transportation and movement are reliable and stable.

[0010] In a possible embodiment, the nut directional screening device includes a block, which is connected to the support frame and is located directly above the conveyor belt. A channel is formed between the block and the conveyor belt, and the channel is only for nuts arranged vertically to pass through. The support frame is provided with a return channel arranged at an angle, and the return channel is located below the conveyor belt. The lower end of the return channel is connected to the feeding port.

[0011] Compared with the existing technology, the above technical solution can screen the nuts on the conveyor belt, leaving the nuts arranged vertically on the conveyor belt, and the other nuts flow back into the accommodating groove again, ensuring the stability of the directional feeding of the nuts.

[0012] In a possible embodiment, the nut directional screening device also includes a bracket, a lifter, a pressure head, a pressure sensor and a screening push cylinder arranged on the rear side of the block, the bracket is fixedly mounted on the support frame, the lifter is mounted on the bracket, the lifting output end of the lifter is connected to the pressure head, the pressure head is movably arranged directly above the conveyor belt, the pressure head has a conical structure with a larger upper part and a smaller lower part and can be inserted into the inner hole of the nut, the pressure sensor is arranged on the lifter and is used to detect the pressure of the pressure head on the nut, the screening push cylinder is mounted on the support frame and is used to push unqualified nuts on the conveyor belt to the return channel, and the screening push cylinder is electrically connected to the pressure sensor.

[0013] Compared with the existing technology, the above technical solution can screen out nuts with the large end of the inner hole facing upward and the small end facing downward on the conveyor belt, ensuring the reliability of subsequent internal thread detection; at the same time, other nuts are returned to the accommodating groove to ensure the stability of the directional feeding of the nuts.

[0014] In a possible embodiment, the nut internal thread detection mechanism includes a lifting part, a driving motor, a thread detection head and a control part. The lifting part is installed on the base, the base of the driving motor is connected to the lifting output end of the lifting part, and the thread detection head is transmission-connected to the rotating shaft of the driving motor. The thread detection head is moved vertically by the lifting part and is located directly above the material trough. The control part is electrically connected to the driving motor and the nut discharging device respectively.

[0015] Compared with the existing technology, the above technical solution can determine whether the thread detection head has successfully entered the internal thread of the nut based on the output information of the driving motor, thereby realizing the detection of the internal thread of the nut, and the detection is stable and reliable.

[0016] In a possible embodiment, the lifting part includes a vertical plate, a lifting cylinder and a lifting plate, the vertical plate is fixedly mounted on the base, the lifting plate is vertically slidably arranged on the vertical plate, the lifting cylinder is mounted on the vertical plate and is used to drive the lifting plate to move, and the base of the driving motor is mounted on the lifting plate; a buffer part for buffering the thread detection head is provided on the lifting plate, the buffer part includes a fixed frame, a buffer frame and a spring, the fixed frame is fixed on the lifting plate, the buffer frame is vertically slidably connected to the lifting plate, the upper end of the spring is connected to the fixed frame, and the lower end of the spring is connected to the buffer frame, and the thread detection head is rotated around its own axis and is arranged on the buffer frame and connected to the buffer frame.

[0017] Compared with the existing technology, the above technical solution can realize the lifting and lowering of the thread detection head on the base; at the same time, the buffer part can buffer the thread detection head, avoid deformation caused by excessive impact, and improve the service life.

[0018] In a possible embodiment, a visual inspection mechanism is further included on the front side of the thread inspection head, the visual inspection mechanism includes a vertical pole, a connecting block, a longitudinal pole and a camera, the vertical pole is fixedly mounted on the base, the connecting block is vertically movable and connected to the vertical pole, a first locking portion is provided between the connecting block and the vertical pole, the longitudinal pole is longitudinally movable and connected to the connecting block, a second locking portion is provided between the longitudinal pole and the connecting block, the camera is connected to the end of the longitudinal pole away from the connecting block, the camera is located directly above the material trough, and the camera is electrically connected to the control unit.

[0019] Compared with the existing technology, the above technical solution can determine the defects of the outer dimensions of the nut through visual inspection, thereby improving the detection reliability.

[0020] In a possible implementation manner, the vertical poles and the longitudinal poles are both cylindrical structures.

[0021] Compared with the existing technology, the above technical solution can easily adjust the position of the camera, which is beneficial to visual inspection.

[0022] In one possible embodiment, the trough of the supporting material rack is arranged to extend laterally, and the nut discharging device includes a chuck, a transverse moving part, a longitudinal moving part and a pushing cylinder, the longitudinal moving part is installed on the base, the longitudinal moving end of the longitudinal moving part is connected to the transverse moving part, the transverse moving end of the transverse moving part is connected to the chuck, the chuck is arranged close to the supporting material rack, and a slot for clamping nuts is provided on the chuck, the chuck is movably arranged between the inlet and the first outlet, and the pushing cylinder is installed on the base and is used to discharge unqualified nuts in the trough from the second outlet.

[0023] Compared with the existing technology, the above technical solution can discharge qualified nuts from the first outlet and unqualified nuts from the second outlet, thereby realizing the sorting of nuts, and the nut movement is reliable and the sorting efficiency is high. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 is a structural diagram of a nut;

[0025] Figure 2 It is a schematic diagram of the overall structure of the utility model;

[0026] Figure 3 This is a partial structural diagram of the utility model Figure 1 ;

[0027] Figure 4 This is a partial structural diagram of the utility model Figure 2 ;

[0028] Figure 5 This is a partial structural diagram of the utility model Figure 3 ;

[0029] Figure 6 This is a partial structural diagram of the utility model Figure 4 ;

[0030] Figure 7 This is a partial structural diagram of the utility model Figure 5 ;

[0031] Figure 8 This is a partial structural diagram of the utility model Figure 6 ;

[0032] Figure 9 This is a partial structural diagram of the utility model Figure 7 ;

[0033] Figure 10 This is a partial structural diagram of the utility model Figure 8 ;

[0034] Figure 11This is a partial structural diagram of the utility model Figure 9 ;

[0035] Figure 12 This is a partial structural diagram of the utility model Figure 10 ;

[0036] Description of reference numerals:

[0037] 1. Nut feeding device; 11. Material frame; 111. Receiving groove; 112. Feeding port; 113. Discharging port; 114. Step; 12. Ejecting mechanism; 121. Ejecting block; 122. Ejecting driver; 13. Support frame; 131. Return channel; 14. Pulley conveying structure; 141. Conveyor belt; 15. Guide plate; 16. Baffle; 17. Support plate; 18. Directional arrangement track; 19. Feeding push cylinder; 2. Nut directional screening device; 21. Baffle; 22. Bracket; 23. Lifter; 24. Press head; 25. Screening push cylinder; 26. Protective part; 261. Cylinder; 262. Guard plate; 27. Position sensor; 3. Nut internal thread detection device; 31. Base; 32. Support frame; 321 , material trough; 322, inlet; 323, first outlet; 324, second outlet; 33, nut internal thread detection mechanism; 331, lifting part; 3311, vertical plate; 3312, lifting cylinder; 3313, lifting plate; 332, driving motor; 333, thread detection head; 334, buffer part; 3341, fixing frame; 3342, buffer frame; 3343, spring; 34, visual detection mechanism; 341, vertical pole; 342, connecting block; 343, longitudinal rod; 344, camera; 345, light source; 4, nut discharging device; 41, chuck; 411, slot; 42, horizontal moving part; 43, longitudinal moving part; 44, pushing cylinder; 45, material guide slope; 5, channel; 10, nut; 101, inner hole. DETAILED DESCRIPTION

[0038] First, those skilled in the art should understand that these embodiments are merely used to explain the technical principles of the embodiments of the present application and are not intended to limit the scope of protection of the embodiments of the present application. Those skilled in the art may adjust them as needed to suit specific application scenarios.

[0039] In the description of the embodiments of this application, it should be noted that, unless otherwise specified or limited, the terms "connected" and "connection" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium. Those skilled in the art will understand the specific meanings of the above terms in the embodiments of this application based on the specific circumstances.

[0040] In the embodiments of the present application, unless otherwise expressly specified or limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediate medium. Furthermore, a first feature being "above," "above," and "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below," "below," and "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0041] The present application is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0042] See also Figures 2 to 12 , the embodiment of the present application discloses a nut outer size and internal thread detection device, comprising a nut feeding device 1, a nut directional screening device 2, a nut internal thread detection device 3 and a nut discharging device 4; the nut feeding device 1 comprises a material frame 11, a lifting mechanism 12 and a horizontal conveying mechanism, the material frame 11 is provided with a receiving groove 111 for accommodating nuts 10, the material frame 11 is provided with a feeding port 112 and a discharging port 113 connected to the receiving groove 111, the lifting mechanism 12 is installed inside the material frame 11 and is used to discharge the nuts in the receiving groove 111 from the discharging port 113, the discharging port 113 of the material frame 11 is connected to the feeding end of the horizontal conveying mechanism, and the horizontal conveying mechanism is used to transport the nuts discharged from the discharging port 113 to the nut internal thread detection device 3; the nut directional screening device 2 is connected to the horizontal conveying mechanism, and the nut directional screening device 2 is used to screen out nuts arranged along a predetermined direction on the horizontal conveying mechanism; the nut internal thread detection device 3 comprises a base 31, a support The support rack 32 and the nut internal thread detection mechanism 33, the support rack 32 is installed on the base 31, the support rack 32 is provided with a material trough 321, the front end of the support rack 32 is provided with an inlet 322 connected to the material trough 321, the inlet 322 of the support rack 32 is connected to the discharging end of the horizontal conveying mechanism, the rear end of the support rack 32 is provided with a first outlet 323 and a second outlet 324 connected to the material trough 321, the nut internal thread detection mechanism 33 is installed on the base 31 and is arranged close to the support rack 32, the nut internal thread detection mechanism 33 is used to detect the internal thread of the nut in the material trough 321; the nut discharging device 4 is installed on the base 31, when the internal thread detected by the nut internal thread detection mechanism 33 is qualified, the nut discharging device 4 discharges the nuts in the material trough 321 from the first outlet 323; when the internal thread detected by the nut internal thread detection mechanism 33 is unqualified, the nut discharging device 4 discharges the nuts in the material trough 321 from the second outlet 324.

[0043] As can be seen from the above, by setting up a nut feeding device 1, the pushing mechanism 12 discharges the nuts in the accommodating groove 111 from the discharge port 113, and the horizontal conveying mechanism conveys the discharged nuts to the nut detection device, that is, automatic loading of nuts is realized; by setting up a nut directional screening device 2, nuts set along a predetermined direction are screened out on the horizontal conveying mechanism, which is beneficial to the subsequent internal thread detection of the nuts; by setting up a nut internal thread detection device 3, a support material rack 32 is used to support the nuts, and its material trough 321 makes the nuts stably set, and the nut internal thread detection mechanism 33 realizes automatic detection of the internal thread of the nuts; by setting up a nut discharging device 4, nuts with qualified internal threads and unqualified internal threads are automatically sorted out, so that the equipment replaces manual nut internal thread detection and improves detection efficiency.

[0044] In this embodiment, the ejecting mechanism 12 includes a ejecting block 121 and a ejecting driver 122. The ejecting driver 122 is fixedly installed in the material frame 11. The output end of the ejecting driver 122 is connected to the ejecting block 121. The ejecting block 121 is located in the accommodating groove 111 and is moved toward the discharge port 113 to discharge the nuts in the accommodating groove 111 from the discharge port 113. The discharge port 113 is provided with a guide plate 15 arranged toward the horizontal conveying mechanism, thereby enabling the nuts in the accommodating groove 111 to be transferred to the horizontal conveying mechanism, automating the loading and improving the loading efficiency and reliability. Specifically, a plurality of steps 114 are fixedly provided in the accommodating groove 111, and the plurality of steps 114 extend progressively from bottom to top to the discharge port 113. Each of the steps 114 is provided with a lifting block 121, and the plurality of lifting blocks 121 are connected to the output end of the lifting driver 122; the upper end surfaces of the steps 114 and the lifting blocks 121 are inclined, and the lifting blocks 121 are arranged at the inclined lower end of each step 114.

[0045] In this embodiment, the transverse conveying mechanism includes a support frame 13 and a pulley conveying structure 14. The support frame 13 is mounted on the material frame 11, and the pulley conveying structure 14 is mounted on the support frame 13. The front side of the conveying belt 141 of the pulley conveying structure 14 is located directly below the guide plate 15. This enables the transverse transport of nuts, and the transport movement is reliable and stable. The support frame 13 is provided with a baffle 16, which is used to prevent the nuts from falling off the conveying belt 141.

[0046] In this embodiment, the nut directional screening device 2 includes a block 21, which is connected to the support frame 13 and is located directly above the conveyor belt 141. A channel 5 is formed between the block 21 and the conveyor belt 141. The channel 5 is only for the nuts arranged vertically to pass through. The support frame 13 is provided with a return channel 131 arranged at an angle. The return channel 131 is located below the conveyor belt 141. The lower end of the return channel 131 is connected to the feeding port 112, thereby enabling the nuts on the conveyor belt 141 to be screened, leaving the nuts arranged vertically on the conveyor belt 141, and the other nuts flow back into the receiving groove 111 again, ensuring the stability of the nut directional feeding. Specifically, the upper and lower spacing of the channel 5 is slightly larger than the thickness of the nut to ensure that the nuts arranged vertically pass through the channel 5.

[0047] In this embodiment, the nut directional screening device 2 also includes a bracket 22, a lifter 23, a pressure head 24, a pressure sensor and a screening push cylinder 25 arranged on the rear side of the stopper 21. The bracket 22 is fixedly mounted on the support frame 13, and the lifter 23 is mounted on the bracket 22. The lifting output end of the lifter 23 is connected to the pressure head 24. The pressure head 24 is movably arranged just above the conveyor belt 141. The pressure head 24 has a conical structure with a large upper portion and a small lower portion and can be inserted into the inner hole 101 of the nut. The pressure sensor is arranged on The lifter 23 is used to detect the pressure of the pressure head 24 on the nut. The screening push cylinder 25 is installed on the support frame 13 and is used to push the unqualified nuts on the conveyor belt 141 to the return channel 131. The screening push cylinder 25 is electrically connected to the pressure sensor and determines the direction of the nut according to the different pressures. In this way, the nuts with the large end of the inner hole 101 facing upward and the small end facing downward can be screened out on the conveyor belt 141 to ensure the reliability of subsequent internal thread detection; at the same time, the other nuts are returned to the accommodating groove 111 to ensure the stability of the directional feeding of the nuts. Specifically, the system further includes two sets of guards 26, with the screening push cylinder 25 positioned between the two sets of guards 26. Each set of guards 26 includes a cylinder 261 and a guard plate 262. The cylinder 261 is mounted on the support frame 13, and the telescopic end of the cylinder 261 is connected to the guard plate 262. The movement direction of the guard plate 262 is arranged parallel to the pushing end of the screening push cylinder 25. When the two guard plates 262 are extended, the nut is positioned between the two guard plates 262 and directly under the pressure head 24, thereby facilitating the compression of the nut and facilitating screening detection. The system further includes a position sensor 27 connected to the support frame 13, which is used to detect whether the nut is directly under the pressure head 24. The support frame 13 is provided with a support plate 17 for supporting the nut, and the support plate 17 is positioned below the conveyor belt 141.

[0048] In this embodiment, the nut feeding device 1 also includes a directional arrangement rail 18 and a feeding push cylinder 19. The inlet end of the directional arrangement rail 18 is connected to the outlet end of the conveyor belt 141, and the outlet end of the directional arrangement rail 18 is connected to the inlet 322 of the support material rack 32. The feeding push cylinder 19 is provided between the directional arrangement rail 18 and the support material rack 32. The feeding push cylinder 19 pushes the nuts on the directional arrangement rail 18 toward the inlet 322 of the support material rack 32.

[0049] In this embodiment, the nut internal thread detection mechanism 33 includes a lifting part 331, a driving motor 332, a thread detection head 333 and a control part. The lifting part 331 is installed on the base 31, and the base of the driving motor 332 is connected to the lifting output end of the lifting part 331. The thread detection head 333 is transmission-connected to the rotating shaft of the driving motor 332. The thread detection head 333 is vertically lifted and moved by the lifting part 331 and is located directly above the material trough 321. The control part is electrically connected to the driving motor 332 and the nut discharging device 4 respectively, thereby being able to judge whether the thread detection head 333 has successfully entered the internal thread of the nut based on the output information of the driving motor 332, thereby realizing the detection of the internal thread of the nut, and the detection is stable and reliable.

[0050] In this embodiment, the lifting portion 331 includes a vertical plate 3311, a lifting cylinder 3312 and a lifting plate 3313. The vertical plate 3311 is fixedly mounted on the base 31, and the lifting plate 3313 is vertically slidably arranged on the vertical plate 3311. The lifting cylinder 3312 is mounted on the vertical plate 3311 and is used to drive the lifting plate 3313 to move. The base of the driving motor 332 is mounted on the lifting plate 3313. A buffer portion 334 for buffering the thread detection head 333 is provided on the lifting plate 3313. The buffer portion 334 includes a fixing frame 3341, a buffer frame 334 2 and spring 3343, the fixing frame 3341 is fixed on the lifting plate 3313, the buffer frame 3342 is connected to the lifting plate 3313 along the vertical sliding, the upper end of the spring 3343 is connected to the fixing frame 3341, and the lower end of the spring 3343 is connected to the buffer frame 3342, the thread detection head 333 is rotatably arranged on the buffer frame 3342 around its own axis and is connected to the buffer frame 3342, thereby enabling the thread detection head 333 to be raised and lowered on the base 31; at the same time, the buffer portion 334 can buffer the thread detection head 333 to avoid deformation caused by excessive impact, thereby improving the service life.

[0051] In this embodiment, the device also includes a visual inspection mechanism 34 located in front of the thread inspection head 333. The visual inspection mechanism 34 includes a vertical rod 341, a connecting block 342, a longitudinal rod 343, and a camera 344. The vertical rod 341 is fixedly mounted on the base 31. The connecting block 342 is connected to the vertical rod 341 along a vertical movement. A first locking portion is provided between the connecting block 342 and the vertical rod 341. The longitudinal rod 343 is connected to the connecting block 342 along a longitudinal movement. A second locking portion is provided between the longitudinal rod 343 and the connecting block 342. The camera 344 is connected to the end of the longitudinal rod 343 away from the connecting block 342. The camera 344 is located directly above the trough 321 and is electrically connected to the control unit. This allows visual inspection to determine defects in the outer dimensions of the nut, thereby improving detection reliability. Specifically, the first locking portion and the second locking portion are both locking screws. To provide lighting for the camera 344, a light source 345 is provided on the vertical rod 341.

[0052] In this embodiment, the vertical rod 341 and the longitudinal rod 343 are both cylindrical structures, which makes it easy to adjust the position of the camera 344 and facilitates visual inspection.

[0053] In this embodiment, the trough 321 of the support material rack 32 is arranged to extend horizontally, and the nut discharging device 4 includes a chuck 41, a transverse moving part 42, a longitudinal moving part 43 and a pushing cylinder 44. The longitudinal moving part 43 is installed on the base 31, and the longitudinal moving end of the longitudinal moving part 43 is connected to the transverse moving part 42. The transverse moving end of the transverse moving part 42 is connected to the chuck 41. The chuck 41 is arranged close to the support material rack 32. The chuck 41 is provided with a clamping groove 411 for clamping nuts. The chuck 41 is movable between the inlet 322 and the first outlet 323. The pushing cylinder 44 is installed on the base 31 and is used to discharge unqualified nuts in the trough 321 from the second outlet 324, thereby enabling qualified nuts to be discharged from the first outlet 323 and unqualified nuts to be discharged from the second outlet 324, thereby realizing nut sorting, reliable nut movement, and high sorting efficiency. Specifically, a material guide slope 45 is provided at the first outlet 323. The control unit is electrically connected to the transverse moving unit 42 , the longitudinal moving unit 43 , and the pushing cylinder 44 .

[0054] The process of nut detection: a plurality of nuts to be detected are placed into the receiving groove 111 of the material frame 11 through the feeding port 112, and the nuts are discharged from the discharge port 113 through the ejecting mechanism 12. The nuts pass through the guide plate 15 and enter the conveying belt 141 of the pulley conveying mechanism. The nuts are screened out by the nut directional screening device 2 and the block 21 along the vertical direction. Then, the nuts with the large end of the inner diameter facing upward and the small end facing downward are further screened out by the pressure head 24, the lifter 23 and the screening push cylinder 25. The oriented nuts enter the nut internal thread detection device. 3. The nuts enter the trough 321 of the support rack 32 from the inlet 322. The camera 344 performs visual inspection first, and then the thread detection head 333 performs inspection. The detection signal is sent to the control unit, and the control unit controls the nut discharging device 4. When the inspection is qualified, the nut discharging device 4 discharges the nuts from the first outlet 323, and then the guide slope 45 guides the discharge. When the inspection fails, the nut discharging device 4 discharges the nuts from the second outlet 324. The whole process is mechanized and automatically carried out, replacing manual inspection, thereby improving inspection efficiency and quality.

[0055] In the description of the embodiments of the present application, it should be noted that in the description of the present application, terms such as "inside" and "outside" indicating directions or positional relationships are based on the directions or positional relationships shown in the accompanying drawings. This is only for the convenience of description and does not indicate or imply that the device or component must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it cannot be understood as a limitation on the present application.

[0056] In the description of the present application, the description with reference to the terms "one embodiment", "some embodiments", "in the present embodiment", "specific example", or "some examples" means that the specific features, mechanisms, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, mechanisms, materials or characteristics described can be combined in a suitable manner in any one or more embodiments or examples. In addition, those skilled in the art can combine and combine different embodiments or examples described in this specification and the features of different embodiments or examples, unless they are contradictory.

[0057] The above description is merely a specific embodiment of the present application, but the scope of protection of the present application is not limited thereto. Any changes or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in the present application should be included in the scope of protection of the present application. Therefore, the scope of protection of the present application should be based on the scope of protection of the claims.

Claims

1. A nut outer dimension and internal thread detection device, characterized in that: It comprises a nut feeding device (1), a nut directional screening device (2), a nut internal thread detection device (3) and a nut discharging device (4); The nut feeding device (1) comprises a material frame (11), a feeding mechanism (12) and a transverse conveying mechanism, wherein a receiving groove (111) for receiving nuts (10) is provided in the material frame (11), a feeding port (112) and a discharge port (113) communicating with the receiving groove (111) are provided on the material frame (11), the feeding mechanism (12) is installed inside the material frame (11) and is used to discharge the nuts in the receiving groove (111) from the discharge port (113), the discharge port (113) of the material frame (11) is connected to the feeding end of the transverse conveying mechanism, and the transverse conveying mechanism is used to transport the nuts discharged from the discharge port (113) to the nut internal thread detection device (3); The nut orientation screening device (2) is connected to the transverse conveying mechanism, and the nut orientation screening device (2) is used to screen out nuts arranged along a predetermined direction on the transverse conveying mechanism; The nut internal thread detection device (3) comprises a base (31), a support material rack (32) and a nut internal thread detection mechanism (33), wherein the support material rack (32) is mounted on the base (31), a material trough (321) is provided on the support material rack (32), an inlet (322) communicating with the material trough (321) is provided at the front end of the support material rack (32), the inlet (322) of the support material rack (32) is connected to the discharge end of the transverse conveying mechanism, and a first outlet (323) and a second outlet (324) communicating with the material trough (321) are provided at the rear end of the support material rack (32), and the nut internal thread detection mechanism (33) is mounted on the base (31) and arranged close to the support material rack (32), and the nut internal thread detection mechanism (33) is used to detect the internal thread of the nut in the material trough (321); The nut discharging device (4) is mounted on a base (31). When the internal thread detected by the nut internal thread detection mechanism (33) is qualified, the nut discharging device (4) discharges the nuts in the trough (321) from a first outlet (323); when the internal thread detected by the nut internal thread detection mechanism (33) is unqualified, the nut discharging device (4) discharges the nuts in the trough (321) from a second outlet (324).

2. The nut outer dimension and internal thread detection device according to claim 1, characterized in that: The ejecting mechanism (12) includes an ejecting block (121) and an ejecting driver (122), wherein the ejecting driver (122) is fixedly installed in the material frame (11), and the output end of the ejecting driver (122) is connected to the ejecting block (121), and the ejecting block (121) is located in the receiving groove (111) and is movable toward the discharge port (113) for discharging the nuts in the receiving groove (111) from the discharge port (113), and a guide plate (15) is provided at the discharge port (113) toward the transverse conveying mechanism.

3. The nut outer dimension and internal thread detection device according to claim 2, characterized in that: The transverse conveying mechanism includes a support frame (13) and a pulley conveying structure (14); the support frame (13) is mounted on the material frame (11); the pulley conveying structure (14) is mounted on the support frame (13); and the front side of the conveying belt (141) of the pulley conveying structure (14) is located directly below the guide plate (15).

4. The nut outer dimension and internal thread detection device according to claim 3, characterized in that: The nut directional screening device (2) includes a block (21), which is connected to the support frame (13) and is located directly above the conveyor belt (141). A channel (5) is formed between the block (21) and the conveyor belt (141), and the channel (5) is only for nuts arranged in the vertical direction to pass through. The support frame (13) is provided with a return channel (131) arranged in an inclined manner. The return channel (131) is located below the conveyor belt (141), and the lower end of the return channel (131) is communicated with the feeding port (112).

5. The nut outer dimension and internal thread detection device according to claim 4, characterized in that: The nut directional screening device (2) further comprises a bracket (22) arranged at the rear side of the stopper (21), a lifter (23), a pressure head (24), a pressure sensor and a screening push cylinder (25), wherein the bracket (22) is fixedly mounted on the support frame (13), the lifter (23) is mounted on the bracket (22), the lifting output end of the lifter (23) is connected to the pressure head (24), the pressure head (24) is movably arranged just above the conveyor belt (141), the pressure head (24) is in a conical structure with a larger upper portion and a smaller lower portion and can be inserted into the inner hole (101) of the nut, the pressure sensor is arranged on the lifter (23) and is used to detect the pressure of the pressure head (24) on the nut, the screening push cylinder (25) is mounted on the support frame (13) and is used to push unqualified nuts on the conveyor belt (141) to the return channel (131), and the screening push cylinder (25) is electrically connected to the pressure sensor.

6. The nut outer dimension and internal thread detection device according to claim 1, characterized in that: The nut internal thread detection mechanism (33) comprises a lifting part (331), a driving motor (332), a thread detection head (333) and a control part. The lifting part (331) is mounted on a base (31). The base of the driving motor (332) is connected to the lifting output end of the lifting part (331). The thread detection head (333) is connected to the rotating shaft of the driving motor (332) through a transmission. The thread detection head (333) is moved vertically by the lifting part (331) and is located directly above the material trough (321). The control part is electrically connected to the driving motor (332) and the nut discharging device (4) respectively.

7. The nut outer dimension and internal thread detection device according to claim 6, characterized in that: The lifting portion (331) includes a vertical plate (3311), a lifting cylinder (3312) and a lifting plate (3313). The vertical plate (3311) is fixedly mounted on the base (31). The lifting plate (3313) is vertically slidably mounted on the vertical plate (3311). The lifting cylinder (3312) is mounted on the vertical plate (3311) and is used to drive the lifting plate (3313) to move. The base of the driving motor (332) is mounted on the lifting plate (3313). The lifting plate (3313) is provided with a buffer portion (3313) for buffering the thread detection head (333). 34), the buffer portion (334) includes a fixed frame (3341), a buffer frame (3342) and a spring (3343), the fixed frame (3341) is fixed on the lifting plate (3313), the buffer frame (3342) is connected to the lifting plate (3313) along the vertical sliding direction, the upper end of the spring (3343) is connected to the fixed frame (3341), and the lower end of the spring (3343) is connected to the buffer frame (3342), and the thread detection head (333) is rotatably arranged on the buffer frame (3342) around its own axis and is connected to the buffer frame (3342).

8. The nut outer dimension and internal thread detection device according to claim 6, characterized in that: The invention also includes a visual inspection mechanism (34) arranged on the front side of the thread inspection head (333), the visual inspection mechanism (34) including a vertical rod (341), a connecting block (342), a longitudinal rod (343) and a camera (344), the vertical rod (341) is fixedly mounted on the base (31), the connecting block (342) is connected to the vertical rod (341) in a vertically movable manner, a first locking portion is provided between the connecting block (342) and the vertical rod (341), the longitudinal rod (343) is connected to the connecting block (342) in a longitudinally movable manner, a second locking portion is provided between the longitudinal rod (343) and the connecting block (342), the camera (344) is connected to the end of the longitudinal rod (343) away from the connecting block (342), the camera (344) is located directly above the material trough (321), and the camera (344) is electrically connected to the control unit.

9. The nut outer dimension and internal thread detection device according to claim 8, characterized in that: The vertical rod (341) and the longitudinal rod (343) are both cylindrical structures.

10. The nut outer dimension and internal thread detection device according to claim 8, characterized in that: The trough (321) of the supporting material rack (32) is arranged to extend transversely, and the nut discharging device (4) includes a chuck (41), a transverse moving part (42), a longitudinal moving part (43) and a pushing cylinder (44). The longitudinal moving part (43) is installed on the base (31), the longitudinal moving end of the longitudinal moving part (43) is connected to the transverse moving part (42), and the transverse moving end of the transverse moving part (42) is connected to the chuck (41). The chuck (41) is arranged close to the supporting material rack (32), and a clamping groove (411) for clamping nuts is provided on the chuck (41). The chuck (41) is arranged to move between the inlet (322) and the first outlet (323). The pushing cylinder (44) is installed on the base (31) and is used to discharge unqualified nuts in the trough (321) from the second outlet (324).

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