Nut external dimension and internal thread detection equipment

Abstract

The invention 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 present invention relates to the technical field of nut detection, and in particular to a nut outer dimension and internal thread detection device. 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 be correctly connected to the screws. The existing methods of detecting the inner threads of nuts mostly rely on manual work. 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 is not only time-consuming and labor-intensive, but also inefficient and unable to quickly detect and screen large quantities of nuts. Figure 1 The nut 10 shown has inner diameters of different sizes at both ends of the inner hole 101 in the nut 10. It is necessary to set the inner hole 101 in a predetermined direction with the large end facing upward and the small end facing downward, that is, the internal thread detection of the nut can be carried out only after orientation. Traditional manual detection seriously reduces the detection efficiency and quality. Summary of the invention

[0003] The technical problem to be solved by the present invention is that the existing methods for detecting the internal threads of nuts mostly rely 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 prior art, the present invention provides a nut outer size and internal thread detection device.

[0004] The present invention 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, the supporting material rack is provided with a material trough, the front end of the supporting material rack is provided with an inlet connected to the material trough, the inlet of the supporting material rack is connected to the discharging end of the horizontal conveying mechanism, and the rear end of the supporting material rack is provided with a first outlet and a second outlet connected to the material trough, 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 dimension and internal thread detection device of 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 lateral conveying mechanism conveys the discharged nuts to the nut detection device, that is, automatic feeding of the nuts is realized; by setting a nut directional screening device, the nuts arranged along a predetermined direction are screened out on the lateral conveying mechanism, which is beneficial to the subsequent internal thread detection of the nuts; by setting a nut internal thread detection device, the support material rack is used to support the nuts, and its material trough enables the nuts to be stably arranged, 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, so that the equipment replaces manual nut internal thread detection and improves detection efficiency.

[0006] In a possible embodiment, the lifting mechanism includes a lifting block and a lifting driver, the lifting driver is fixedly installed in the material frame, the output end of the lifting driver is connected to the lifting block, the lifting 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 and is arranged toward the horizontal conveying mechanism.

[0007] Compared with the prior art, 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, wherein the support frame is mounted on the material frame, the pulley conveying structure is mounted on the support frame, and the front side of the conveying belt of the pulley conveying structure is located directly below the guide plate.

[0009] Compared with the prior art, the above technical solution can realize the lateral transportation and movement of the nuts, and the transportation and movement is reliable and stable.

[0010] In a possible embodiment, the nut directional screening device includes a block, which is connected to a support frame and is located directly above a 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. An inclined return channel is provided on the support frame, and the return channel is located below the conveyor belt. The lower end of the return channel is connected to a feeding port.

[0011] Compared with the prior art, 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, thereby ensuring the stability of 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 top and a smaller bottom 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 directional feeding of 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 a base, the base of the driving motor is connected to the lifting output end of the lifting part, the thread detection head is transmission-connected to the rotating shaft of the driving motor, the thread detection head is vertically lifted and moved by the lifting part and is located directly above the material trough, and the control part is electrically connected to the driving motor and the nut discharging device respectively.

[0015] Compared with the prior art, the above technical solution can determine whether the thread detection head has successfully entered the internal thread of the nut according to 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 a 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, the lower end of the spring is connected to the buffer frame, and the thread detection head is rotatably arranged on the buffer frame around its own axis and is connected to the buffer frame.

[0017] Compared with the prior art, 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 to avoid deformation caused by excessive impact and increase the service life.

[0018] In a possible embodiment, it also includes a visual inspection mechanism arranged 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 connected to the vertical pole along the vertical movement, a first locking portion is provided between the connecting block and the vertical pole, the longitudinal pole is connected to the connecting block along the longitudinal movement, 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 prior art, the above technical solution can determine the defects of the outer dimensions of the nut through visual inspection, thereby improving the reliability of inspection.

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

[0021] Compared with the prior art, the above technical solution can conveniently adjust the position of the camera, which is beneficial to visual inspection.

[0022] In a 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 prior art, the above technical solution enables qualified nuts to be discharged from the first outlet and unqualified nuts to be discharged from the second outlet, thereby realizing nut sorting, and the nut movement is reliable and the sorting efficiency is high. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 is a schematic diagram of the structure of a nut;

[0025] Figure 2 It is a schematic diagram of the overall structure of the present invention;

[0026] Figure 3 It is a partial structural diagram of the present invention. Figure 1 ;

[0027] Figure 4 It is a partial structural diagram of the present invention. Figure 2 ;

[0028] Figure 5 It is a partial structural diagram of the present invention. Figure 3 ;

[0029] Figure 6 It is a partial structural diagram of the present invention. Figure 4 ;

[0030] Figure 7 It is a partial structural diagram of the present invention. Figure 5 ;

[0031] Figure 8 It is a partial structural diagram of the present invention. Figure 6 ;

[0032] Fig. 9 It is a partial structural diagram of the present invention. Figure 7 ;

[0033] Fig.10 It is a partial structural diagram of the present invention. Figure 8 ;

[0034] Fig.11 It is a partial structural diagram of the present invention. Figure 9 ;

[0035] Fig.12 It is a partial structural diagram of the present invention. Figure 10 ;

[0036] Description of reference numerals:

[0037] 1. Nut feeding device; 11. Material frame; 111. Accommodating 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. Conveying belt; 15. Guide plate; 16. Baffle plate; 17. Support plate; 18. Directional arrangement track; 19. Feeding push cylinder; 2. Nut directional screening device; 21. Baffle block; 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. Supporting material 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 pole; 344, camera; 345, light source; 4, nut discharging device; 41, chuck; 411, slot; 42, lateral 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 implementations are only used to explain the technical principles of the embodiments of the present application, and are not intended to limit the protection scope of the embodiments of the present application. Those skilled in the art can make adjustments to them as needed to adapt to specific application scenarios.

[0039] In the description of the embodiments of the present application, it should be noted that, unless otherwise clearly specified and limited, the terms "connected" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the embodiments of the present application can be understood according to specific circumstances.

[0040] In the embodiments of the present application, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "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" or "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, including 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 includes a material frame 11, a feeding mechanism 12 and a transverse 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 feeding 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 transverse conveying mechanism, and the transverse 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 transverse conveying mechanism, and the nut directional 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 includes a base 31, a support A support rack 32 and a nut internal thread detection mechanism 33, wherein the support rack 32 is mounted on a base 31, a material trough 321 is provided on the support rack 32, an inlet 322 connected to the material trough 321 is provided at the front end of the support rack 32, the inlet 322 of the support rack 32 is connected to the discharging end of the transverse conveying mechanism, and a first outlet 323 and a second outlet 324 connected to the material trough 321 are provided at the rear end of the support rack 32, the nut internal thread detection mechanism 33 is mounted on the base 31 and 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 mounted 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 known 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 lateral conveying mechanism conveys the discharged nuts to the nut detection device, that is, automatic feeding of nuts is realized; by setting up a nut directional screening device 2, nuts arranged along a predetermined direction are screened out on the lateral 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 enables the nuts to be stably arranged, 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 can be automatically sorted out, so that the equipment replaces manual nut internal thread detection and improves detection efficiency.

[0044] In this embodiment, the ejection mechanism 12 includes a ejection block 121 and a ejection driver 122. The ejection driver 122 is fixedly installed in the material frame 11. The output end of the ejection driver 122 is connected to the ejection block 121. The ejection block 121 is located in the receiving groove 111 and is moved toward the discharge port 113 to discharge the nuts in the receiving groove 111 from the discharge port 113. A guide plate 15 is provided at the discharge port 113 and is arranged toward the transverse conveying mechanism, so that the nuts in the receiving groove 111 can be transferred to the transverse conveying mechanism, thereby 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 progressively extend from bottom to top to the discharge port 113, and 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, thereby enabling the lateral transport movement of the nuts to be achieved, and the transport movement is reliable and stable. A baffle 16 is provided on the support frame 13, and the baffle 16 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 nuts arranged vertically 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. The lower end of the return channel 131 is connected to the feeding port 112, so that the nuts on the conveyor belt 141 can be screened, and the nuts arranged vertically are left on the conveyor belt 141, and the other nuts flow back into the receiving groove 111 again, so as to ensure 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, so as 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, 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 a conical structure with a large top and a small bottom and can be inserted into the inner hole 101 of the nut, and the pressure sensor is arranged The lifter 23 is used to detect the pressure of the pressure head 24 on the nuts. The screening push cylinder 25 is installed on the support frame 13 and is used to push unqualified nuts on the conveyor belt 141 to the return channel 131. The screening push cylinder 25 is electrically connected to the pressure sensor to determine the direction of the nuts according to the different pressures. In this way, 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, other nuts are returned to the accommodating groove 111 to ensure the stability of directional feeding of the nuts. Specifically, it also includes two groups of guards 26, the screening push cylinder 25 is located between the two groups of guards 26, each group of the guards 26 includes a cylinder 261 and a guard plate 262, the cylinder 261 is installed on the support frame 13, the telescopic end of the cylinder 261 is connected to the guard plate 262, the moving direction of the guard plate 262 is arranged parallel to the push end of the screening push cylinder 25, when the two guard plates 262 move out, the nut is located between the two guard plates 262 and directly under the pressure head 24, thereby facilitating the extrusion of the nut and facilitating screening detection; it also includes a position sensor 27 connected to the support frame 13, the position sensor 27 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 located under 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, the outlet end of the directional arrangement rail 18 is connected to the inlet 322 of the support material rack 32, and the feeding push cylinder 19 is provided between the directional arrangement rail 18 and the support material rack 32, and 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 according to 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 part 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 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. The lifting plate 3313 is provided with a buffer part 334 for buffering the thread detection head 333. The buffer part 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 connected to the buffer frame 3342, thereby enabling the thread detection head 333 to be lifted and lowered on the base 31; at the same time, the buffer part 334 can buffer the thread detection head 333 to avoid deformation caused by excessive impact and improve the service life.

[0051] In this embodiment, the device also includes a visual inspection mechanism 34 arranged at the front side of the thread detection 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 installed on the base 31, the connecting block 342 is connected to the vertical rod 341 along the 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 the 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 the camera 344 is electrically connected to the control unit, thereby being able to judge the defects of the outer dimensions of the nut by visual inspection, thereby improving the detection reliability. Specifically, the first locking portion and the second locking portion are both locking screws. In order 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, so that the position of the camera 344 can be easily adjusted, which is beneficial to visual detection.

[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 lateral 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 lateral moving part 42, and the lateral moving end of the lateral moving part 42 is connected to the chuck 41. The chuck 41 is arranged close to the support 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, 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 the sorting of nuts, and the nut movement is reliable and the sorting efficiency is high. Specifically, a 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 discharging port 113 through the pushing 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 screened and 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 inspection 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 is unqualified, 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 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" etc. 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 may be combined in a suitable manner in any one or more embodiments or examples. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0057] The above is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any changes or substitutions that can be easily thought of by a person skilled in the art within the technical scope disclosed in the present application should be included in the protection scope of the present application. Therefore, the protection scope of the present application shall be based on the protection scope 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; a receiving groove (111) for receiving nuts (10) is provided in the material frame (11); a feeding port (112) and a discharging 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 discharging port (113); the discharging port (113) of the material frame (11) is connected to the feeding end of the transverse conveying mechanism; the transverse conveying mechanism is used to transport the nuts discharged from the discharging 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); 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) connected to 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; a first outlet (323) and a second outlet (324) connected to the material trough (321) are provided at the rear end of the support material rack (32); the nut internal thread detection mechanism (33) is mounted on the base (31) and is arranged close to the support material 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 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 trough (321) from the second outlet (324).

2. The nut outer dimension and internal thread detection device according to claim 1 is characterized in that: The ejecting mechanism (12) comprises 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) so as to discharge the nuts in the receiving groove (111) from the discharge port (113), and a guide plate (15) arranged toward the horizontal conveying mechanism is provided at the discharge port (113).

3. The nut outer dimension and internal thread detection device according to claim 2 is characterized in that: The transverse conveying mechanism comprises a support frame (13) and a pulley conveying structure (14); the support frame (13) is mounted on a material frame (11); the pulley conveying structure (14) is mounted on the support frame (13); and the front side of a 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) comprises a block (21), the block (21) 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 nuts arranged in the vertical direction to pass through, the support frame (13) is provided with an inclined return channel (131), the return channel (131) is located below the conveyor belt (141), and the lower end of the return channel (131) is connected to 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) also includes 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 conveying 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 conveying 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 installed on the 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 transmission-connected to the rotating shaft of the driving motor (332). 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 part (331) comprises 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 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 part (3313) for buffering the thread detection head (333) is provided on the lifting plate (3313); 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 vertically slidably connected to the lifting plate (3313), 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 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 material trough (321) of the supporting material rack (32) is arranged to extend transversely, and the nut discharging device (4) comprises 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); 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); 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 material trough (321) from the second outlet (324).

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