Automatic assembling equipment for hanging nut and nut buckle for microwave oven

Abstract

The utility model discloses an automatic assembling device for a hanging nut and a nut buckle for a microwave oven, which comprises an assembling component used for installing the nut into a buckle, the assembling component is connected with a nut input path, and a nut testing device is arranged on the nut input path. The nut testing device comprises a thread testing assembly and a testing channel used for being matched with sliding of a nut, the thread testing assembly comprises a screw lifting air cylinder, a lifting base, a motor, a testing rotating shaft and a testing screw used for being in threaded connection with a threaded hole of the nut on the testing channel, and the upper end of the testing screw is integrally connected with a handle part. The handle part and the test rotating shaft are in relative up-and-down sliding connection, the test rotating shaft and the handle part are circumferentially and oppositely positioned, the handle part can move upwards relative to the test rotating shaft to enable the compression spring to be elastically compressed and deformed, the thread test assembly comprises a test in-place proximity switch used for detecting the lower end of the handle part, and the control system is electrically connected with the test in-place proximity switch. According to the utility model, the product quality of the hanging nut assembly part can be improved.

Description

Technical Field

[0001] The utility model relates to the field of nut and fastener assembly equipment, in particular to an automatic assembly equipment for hanging nuts and nut buckles used in microwave ovens. Background Art

[0002] Currently, if Figure 11 As shown, the hanging nut assembly for a microwave oven includes a fastener 98 (that is, a nut buckle) and a nut 99. The fastener 98 is bent to form a rectangular cross-section groove, and the edge of the groove of the rectangular cross-section is folded inward and then turned outward. A first baffle 981 and a second baffle 982 are respectively formed on both sides of the fastener 98. The nut 99 is in the shape of a rectangular parallelepiped. The nut 99 is inserted into the above-mentioned rectangular cross-section groove, and the nut 99 is adapted to be arranged between the first baffle 981 and the second baffle 982, so that the nut 99 is positioned in the fastener 98. The fastener 98 is used to buckle the outer shell assembly of the microwave oven. For example, the hanging nut assembly is arranged on the top of the outer shell assembly of the microwave oven. There is currently an apparatus for automatically assembling hanging nuts and nut buckles, which includes an assembly component, in which the fasteners and nuts are sorted and output through corresponding vibration disks, wherein the fasteners are pre-bent to form a rectangular cross-section groove and a first baffle 981, and the second baffle 982 needs to be bent and formed in the assembly component, that is, the fastener 98 output by the vibration disk is a reserved insertion port for the nut 99, and then the fasteners and nuts reach the assembly component through corresponding input paths respectively, the assembly component completes the assembly process and discharges the hanging nut assembly; however, in the actual production process, there are occasional cases where the nut 99 misses the threaded hole 991, or the threaded hole 991 is not fully tapped, or there is a defect in the threaded hole 991, making the hanging nut assembly a defective product, which leads to quality problems in the microwave oven product. The existing assembly equipment does not have a relevant test structure for the threaded hole 991, so it is necessary to improve it. Summary of the Invention

[0003] The purpose of the utility model is to overcome the deficiencies of the prior art and provide an automatic assembly device for hanging nuts and nut buckles for microwave ovens, which is beneficial to improving the product quality of hanging nut assemblies.

[0004] The purpose of this utility model is achieved through the following technical solutions.

[0005] The utility model discloses an automatic assembly device for hanging nuts and nut buckles for microwave ovens, comprising an assembly component for installing nuts into fasteners, wherein the assembly component is connected to a nut input path, wherein a nut testing device is provided on the nut input path, wherein the nut testing device comprises a threaded testing component and a testing groove for adapting to the sliding of the nut, the threaded testing component comprises a screw lifting cylinder, a lifting seat, a motor, a testing shaft and a testing screw for screwing the threaded hole of the nut on the test groove, the testing shaft is rotatably connected to the lifting seat, the motor is installed on the lifting seat, and the screw lifting The cylinder drives the lifting seat to move up and down, and the motor drives the test shaft to rotate. The upper end of the test screw is integrally connected with a handle, and the handle and the test shaft are slidably connected up and down relative to each other. The test shaft and the handle are circumferentially positioned relative to each other. The threaded test assembly includes a compression spring, which is connected to the handle. The handle can move upward relative to the test shaft to elastically compress and deform the compression spring. The threaded test assembly includes a test in-position proximity switch for detecting the lower end of the handle; and also includes a control system, which is electrically connected to the test in-position proximity switch.

[0006] Preferably, the nut testing device includes a small-diameter testing assembly, and the small-diameter testing assembly and the thread testing assembly are arranged along the testing groove. The small-diameter testing assembly is provided with a pin for inserting a nut that has been tested by the thread testing assembly. The small-diameter testing assembly is provided with a pin lifting cylinder, and the piston rod of the pin lifting cylinder is relatively fixedly connected to the pin. The pin lifting cylinder is provided with a test-in-place magnetic switch, and the control system is electrically connected to the test-in-place magnetic switch.

[0007] Preferably, the automatic assembly equipment of the present invention also includes a transfer channel, one end of the transfer channel is connected to the assembly component, and the other end of the transfer channel is connected to the test channel. The nut testing device includes a nut station transfer component for transferring the nuts on the test channel, and the nut testing device includes a test removal component for laterally pushing the tested nuts to the transfer channel. A defective product discharge port is provided at the end of the test channel, and the control system controls the connection between the nut station transfer component and the test removal component.

[0008] Preferably, the upper portion of the handle is coaxially connected to the lower portion of the test shaft, the compression spring is disposed in the test shaft, and the lower end of the compression spring is abutted against the upper end surface of the handle.

[0009] Preferably, a sliding groove extending in the up-down direction is formed at the lower portion of the test shaft, a limiting pin is threadedly mounted on the handle, and the limiting pin is adapted to slide in the sliding groove.

[0010] Compared with the prior art, the beneficial effects of the present invention are as follows: a nut testing device is arranged on the nut input path, the nut testing device includes a threaded testing assembly and a test groove for adapting to the sliding of the nut, the threaded testing assembly includes a screw lifting cylinder, a lifting seat, a motor, a test shaft and a test screw for threaded holes of nuts on the test groove, the upper end of the test screw is integrally connected with a handle, the handle and the test shaft are connected for relative up and down sliding, the test shaft and the handle are circumferentially positioned relative to each other, the threaded testing assembly includes a compression spring, the threaded testing assembly includes a test in place proximity switch for detecting the lower end of the handle, and the control system is electrically connected to the test in place proximity switch, which can avoid defective nuts from being assembled into fasteners. Relatively speaking, it is beneficial to improve the product quality of the hanging nut assembly. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 The utility model is a three-dimensional structural diagram of the automatic assembly equipment of hanging nuts and nut buckles for microwave ovens.

[0012] Figure 2 for Figure 1 Schematic diagram of the local structure at point A.

[0013] Figure 3 It is a schematic diagram of the three-dimensional structure of the nut testing device and the nut straight vibrator combination of the present invention.

[0014] Figure 4 for Figure 3 Schematic diagram of the local structure at point B.

[0015] Figure 5 It is a schematic cross-sectional structural diagram of the assembly of the test shaft and the test screw of the present invention.

[0016] Figure 6 for Figure 3 Schematic diagram of the local structure at point C.

[0017] Figure 7 It is a schematic diagram of the three-dimensional structure of the latch of the present invention.

[0018] Figure 8 It is a schematic diagram of the three-dimensional structure of the assembly component, the fastener straight vibrator and the discharge chute of the present invention.

[0019] Figure 9 It is a three-dimensional structural diagram of the fastener material dividing push plate and assembly channel combination of the present utility model.

[0020] Figure 10 This is a schematic diagram of the three-dimensional structure of the baffle bending assembly with the frame removed according to the present invention.

[0021] Figure 11It is a schematic diagram of the three-dimensional structure of the hanging nut assembly.

[0022] Explanation of reference numerals: nut feeding assembly 1; nut vibrating plate 11; nut straight vibrator 12; nut testing device 2; nut distributing cylinder 21; testing channel 22; defective product discharge port 221; thread testing assembly 23; screw lifting cylinder 231; lifting seat 232; motor 233; testing shaft 234; slide 2341; testing screw 235; handle 2350; test in-position proximity switch 236; switch bracket 2360; limit pin 237; compression spring 238; nut station transfer assembly 24; shift fork 241; transverse drive cylinder 242; longitudinal drive cylinder 243; small diameter testing assembly 25; latch 251; latch lift Lowering cylinder 252; test in-position magnetic switch 2521; test removal assembly 26; push rod 261; push rod cylinder 262; transfer channel 3; fastener loading assembly 4; fastener vibration plate 41; fastener straight vibrator 42; assembly assembly 5; fastener dividing cylinder 51; fastener dividing push plate 511; fastener accommodating groove 5111; assembly channel 52; fastener station transfer assembly 53; nut assembly pushing cylinder 54; baffle bending assembly 55; pressure rod 551; pressure rod driving cylinder 552; ejector rod 553; ejector cylinder 554; discharge chute 6; nut 99; threaded hole 991; fastener 98; first baffle 981; second baffle 982. DETAILED DESCRIPTION

[0023] The present invention will be further described below in conjunction with the accompanying drawings.

[0024] The utility model is an automatic assembly device for hanging nuts and nut buckles for microwave ovens, such as Figure 1 As shown, it includes an assembly component 5 for inserting a nut 99 into a fastener 98, and the assembly component 5 is connected to a nut input path, that is, the nut 99 reaches the assembly component 5 through the nut input path. Figure 1 As shown, a nut testing device 2 is provided on the nut input path, as shown in FIG. Figure 2 、 Figure 4 and Figure 6As shown, the nut testing device 2 includes a threaded testing assembly 23 and a testing groove 22 for adapting the sliding of the nut 99. The threaded testing assembly 23 includes a screw lifting cylinder 231, a lifting seat 232, a motor 233, a testing shaft 234 and a testing screw 235 for screwing the threaded hole 991 of the nut 99 on the test groove 22. The motor 233 can be a servo motor. The testing shaft 234 is rotatably connected to the lifting seat 232 through a bearing. The rotation axis of the testing shaft 234 is along the up and down direction. Extended setting, the motor 233 is installed on the lifting seat 232 through the corresponding screws, the motor 233 is set above the test shaft 234, the screw lifting cylinder 231 drives the lifting seat 232 to move up and down, the lifting seat 232 is set to slide up and down through the corresponding linear guide pair, the piston rod of the screw lifting cylinder 231 is installed and connected to the lifting seat 232, and the motor 233 drives the test shaft 234 to rotate. Specifically, the output shaft of the motor 233 is connected to the upper end of the test shaft 234 through a coupling, such as Figure 5 As shown, the upper end of the test screw 235 is integrally connected to a handle 2350, which is connected to the test shaft 234 in a sliding manner. The handle 2350 is cylindrical, and the outer diameter of the handle 2350 is significantly larger than the major diameter of the thread of the test screw 235. The test shaft 234 and the handle 2350 are positioned relative to each other in the circumferential direction. In other words, the handle 2350 and the test shaft 234 cannot rotate relative to each other. The threaded test assembly 23 includes a compression spring 238, which is connected to the handle 2350. The handle 2350 can move upward relative to the test shaft 234 to elastically compress and deform the compression spring 238. Figure 4 As shown, the thread testing assembly 23 includes a test-in-place proximity switch 236 for detecting the lower end of the handle 2350. A switch bracket 2360 is mounted on the test slot 22, and the test-in-place proximity switch 236 is inserted into the switch bracket 2360. The automatic assembly equipment of the present invention also includes a control system electrically connected to the test-in-place proximity switch 236.

[0025] The following briefly describes the working principle of the nut testing device 2 of the present invention: Figure 1 、 Figure 3 and Figure 4As shown, the nut feeding assembly 1 includes a nut vibrating plate 11 and a nut straight vibrator 12. The nut vibrating plate 11 arranges the nuts 99 and outputs them to the nut straight vibrator 12. The nut testing device 2 is provided with a nut dividing cylinder 21. The nut dividing cylinder 21 pushes the nuts 99 at the end of the nut conveying rail on the nut straight vibrator 12 to the head end of the test groove 22. For example, the nut dividing cylinder 21 pushes two nuts 99 to the head end of the test groove 22 each time, and then the nuts 99 are transferred in the test groove 22. During this period, the width of the test groove 22 is adapted to the nut 99 in the form of a rectangular parallelepiped, so that the axis of the threaded hole 991 of the nut 99 in the test groove 22 In the up and down direction, when the nut 99 reaches the thread test station, the screw lifting cylinder 231 lowers the lifting seat 232, causing the motor 233, the test shaft 234 and the test screw 235 to descend at the same time. When the lower end of the test screw 235 abuts against the edge of the hole 991 of the nut 99, the test screw 235 is temporarily blocked by the nut 99 and stops, but the test shaft 234 still descends a distance, causing the test screw 235 to move upward relative to the test shaft 234, and the test screw 235 pushes the compression spring 238 upward, causing the compression spring 238 to elastically compress and deform. When the lifting seat 232 is lowered into place (that is, the lifting seat 232 is lowered to the limit The motor 233 drives the test shaft 234 to rotate clockwise (in a top-down view). Since the test shaft 234 and the handle 2350 are circumferentially positioned relative to each other, the test shaft 234 drives the test screw 235 to rotate clockwise, and the elastic restoring force of the compression spring 238 pushes down the test screw 235, so that the test screw 235 is screwed into the threaded hole 991. When the test screw 235 spirally descends to the test in-position position, for example, when the threaded hole 991 is fully threaded with the test screw 235 and the test screw 235 passes downward over two to three times the pitch of the threaded hole 991, it is the above-mentioned test in-position position. In other words, when the test If the test screw 235 can reach the test in place position, it means that the threaded hole 991 has passed the test. At this time, the handle 2350 just drops to the position corresponding to the test in place proximity switch 236, that is, the test in place proximity switch 236 is radially close to the lower end of the handle 2350, so that the lower end of the handle 2350 triggers the test in place proximity switch 236. The control system knows that the nut 99 has passed the thread test based on the on signal of the test in place proximity switch 236. In other words, since the radial distance between the external thread of the test screw 235 and the test in place proximity switch 236 is relatively large, the external thread of the test screw 235 will not trigger the test in place proximity switch 236.After the test is completed, the motor 233 drives the test shaft 234 to reverse (rotate counterclockwise), and the test screw 235 (overcoming the elastic restoring force of the compression spring 238) spirally moves up and away from the nut 99, and then the screw lifting cylinder 231 drives the lifting seat 232 to move up and reset, and the compression spring 238 elastically resets and drives the test screw 235 to move down and reset relative to the test shaft 234. During this period, the rear side of the test slot 22 (at; Figure 4 The nut 99 is then transferred to the assembly assembly 5. If the threaded hole 99 is not machined in the nut 99, the test screw 235 will not move downward when the test screw 235 rotates, so the test in place proximity switch 236 will not be triggered, and the control system will know that the nut 99 has failed the test. For example, the control system can control the warning device to emit a warning light or sound, or the control system can shut down and wait for manual processing. If the threaded hole 99 of the nut 99 is defective, the test screw 235, although partially threaded with the threaded hole 99, is stuck and cannot be screwed down to the above-mentioned test in place position, and the test in place proximity switch 236 will also not be triggered. By providing the nut testing device 2, the control system can promptly detect defective nuts 99 and prevent them from being assembled into the fastener 98. This is relatively beneficial to improving the product quality of the hanging nut assembly.

[0026] Furthermore, if Figure 3 As shown, the nut testing device 2 includes a small diameter testing component 25. The small diameter testing component 25 and the thread testing component 23 are arranged along the test groove 22. That is, the small diameter test and the thread test are performed at different stations. The small diameter testing component 25 is provided with a pin 251 for inserting the nut 99 that has been tested by the thread testing component 23. That is to say, the threaded hole 991 of the nut 99 is also subjected to a small diameter test after the thread test, as shown in FIG. Figure 6 and Figure 7As shown, the small-diameter test assembly 25 is provided with a latch lifting cylinder 252, the piston rod of the latch lifting cylinder 252 is relatively fixedly connected to the latch 251, the latch lifting cylinder 252 is provided with a test-in-place magnetic switch 2521, and the control system is electrically connected to the test-in-place magnetic switch 2521. For example, the lower end of the piston rod of the latch lifting cylinder 252 is coaxially threadedly installed on the upper part of the latch 251, and the test-in-place magnetic switch 2521 is an accessory of the latch lifting cylinder 252. The test-in-place magnetic switch 2521 can be triggered by the magnetic part on the piston of the latch lifting cylinder 252, so when the nut 99 is moved to the small-diameter test station in the test groove 22, the latch lifting cylinder 252 drives the latch 251 to descend, and the latch 251 The lower end of the bolt 251 is inserted into the threaded hole 991. When the bolt 251 passes through the threaded hole 991 downward and reaches the position, the magnetic part on the piston of the bolt lifting cylinder 252 just triggers the test-in-place magnetic switch 2521. The control system knows that the minor diameter of the threaded hole 991 is qualified based on the connection signal of the test-in-place magnetic switch 2521. Then the bolt lifting cylinder 252 drives the bolt 251 to rise and leave the nut 99, and the nut 99 is then moved to the assembly component 5; if the minor diameter of the threaded hole 991 is too small, the bolt 251 will not be able to pass through the threaded hole 991 (the downward thrust of the bolt lifting cylinder 252 is set to be small), so the test-in-place magnetic switch 2521 will not be triggered, and the control system will determine that the nut 99 is a defective product. In actual application, in order to facilitate the user to connect the hanging screw with the nut 99, the threaded hole 991 should fit loosely with the hanging screw. That is, the hanging screw can be connected to the threaded hole 991 by turning the hanging screw by hand. If the minor diameter of the threaded hole 991 is too small, although the test screw 235 can also be screwed in, the user will feel difficulty when installing the hanging screw on site.

[0027] Further, if Figure 1 As shown, the assembly device of the present invention further includes a transfer channel 3, one end of the transfer channel 3 is connected to the assembly component 5, and the other end of the transfer channel 3 is connected to the test channel 22. The transfer channel 3 is perpendicular to the test channel 22. Figure 3As shown, the nut testing device 2 includes a nut station transfer assembly 24 for transferring the nuts 99 on the test groove 22. For example, the nut station transfer assembly 24 includes a shift fork 241, a transverse drive cylinder 242 and a longitudinal drive cylinder 243. In the extension direction parallel to the test groove 22, the shift forks 241 are arranged on the fork seat at equal intervals. The fork seat is longitudinally (i.e., parallel to the extension direction of the test groove 22) slidably connected to the transverse seat. The transverse seat is arranged for transverse linear movement. The piston rod of the transverse drive cylinder 242 is connected to the transverse seat. The longitudinal drive cylinder 243 is installed on the transverse seat. The piston rod of the longitudinal drive cylinder 243 is connected to one end of the fork seat. Therefore, the longitudinal drive cylinder 243 drives each shift fork 241 to move longitudinally synchronously, and the transverse drive cylinder 242 can drive each shift fork 241 to move laterally synchronously. Figure 3 Under the visual perception, the fork 241 moves backward to fork the upper part of the nut 99. When the fork 241 moves to the left, it shifts the nut 99 to the left, so that the nut 99 moves to the next station. Then the lateral driving cylinder 242 drives the fork 241 to move forward to leave the nut 99. Since the test groove 22 guides the lower part of the nut 99, the nut 99 will not be driven forward by the fork 241. Then the fork 241 moves to the right to reset, and the cycle continues. Figure 1 、 Figure 2 and Figure 3 As shown, the nut testing device 2 includes a test removal assembly 26 for laterally pushing the tested nut 99 to the transfer channel 3. The end of the test channel 22 is provided with a defective discharge port 221. The control system controls the connection between the nut station transfer assembly 24 and the test removal assembly 26. Specifically, the control system controls the lateral drive cylinder 242 and the longitudinal drive cylinder 243 through the corresponding electromagnetic reversing valves. Figure 2 As shown, the test removal assembly 26 includes a push rod 261 and a push rod cylinder 262. The push rod cylinder 262 drives the corresponding push rod 261 to move in a direction perpendicular to the test slot 22. Figure 3As shown, the nut 99 pushed into the test groove 22 by the nut dividing cylinder 21 is transferred to the thread test station through the nut station transfer component 24. After the thread test is completed, the nut station transfer component 24 transfers the nut 99 to the small diameter test station, and then the nut station transfer component 24 transfers the nut 99 to the output station. The test removal component 26 pushes the nut 99 located at the above-mentioned output station horizontally to the head end of the transfer groove 3. If the test-in-place proximity switch 236 and / or the test-in-place magnetic switch 2521 detects defective products, the control system learns the position of the defective nut 99 according to the on signals of the test-in-place proximity switch 236 and the test-in-place magnetic switch 2521, and the control system transfers the defective nut 99 according to the station transfer signal of the nut station transfer component 24. In this case, the control system can know whether the nut 99 at the output station is defective. If the nut 99 is defective, the control system makes the test removal component 26 inactive, so that the defective nut 99 remains at the output station. In the next round of action of the nut station transfer component 24, the nut station transfer component 24 pushes the defective nut 99 out of the test channel 22 through the defective discharge port 221. A cardboard box can be used to catch the defective nut 99 that falls from the defective discharge port 221. In other words, the fork seat is provided with a shift fork 241 for shifting the defective nut 99 on the output station out of the defective discharge port 221. However, if the nut 99 is qualified, the test removal component 26 will first push the qualified nut 99 to the head end of the transfer channel 3. By setting the defective discharge port 221, the separation operation of the defective nut 99 can be achieved with a simple structure.

[0028] Furthermore, if Figure 5 As shown, the upper part of the handle 2350 is adapted to be coaxially connected to the lower part of the test shaft 234, specifically, a blind hole is formed in the lower part of the test shaft 234, and the upper part of the handle 2350 can flexibly slide up and down in the above-mentioned blind hole, and the compression spring 238 is arranged in the test shaft 234, specifically, the compression spring 238 is arranged in the above-mentioned blind hole, the lower end of the compression spring 238 is abutted against the upper end surface of the connected handle 2350, and the upper end of the compression spring 238 is abutted against the bottom of the above-mentioned blind hole. The above-mentioned structure is conducive to the elastic restoring force of the compression spring 238 being coaxially applied to the handle 2350, and is conducive to the compression spring 238 being able to flexibly push the handle 2350 downward relatively.

[0029] Furthermore, if Figure 5As shown, the lower part of the test shaft 234 is formed with a slide groove 2341 extending in the up and down directions, and the handle 2350 is screwed with a limit pin 237, and the limit pin 237 is adapted to slide in the slide groove 2341. Since the handle 2350 is screwed with the limit pin 237, the handle 2350 will be blocked by the slide groove 2341 when it rotates relative to the test shaft 234. Therefore, the structure is simple, which enables the test shaft 234 and the test screw 235 to be circumferentially positioned relative to each other. When the test screw 235 is worn, after removing the limit pin 237, pull out the handle 2350 downward, insert the handle 2350 of the new test screw 235 upward into the above-mentioned blind hole, so that the compression spring 238 is elastically compressed and deformed slightly, and then insert the limit pin 237 into the slide groove 2341 and connect it with the screw hole on the handle 2350. After that, the lower end of the slide groove 2341 blocks the limit pin 237 and prevents the handle 2350 from detaching from the test shaft 234. The above structure is conducive to the quick maintenance of the test screw 235.

[0030] like Figure 1 As shown, the automatic assembly equipment of the present invention includes a fastener feeding assembly 4, which includes a fastener vibration plate 41 and a fastener straight vibrator 42. The fastener vibration plate 41 arranges the fasteners 98 and outputs them to the fastener straight vibrator 42. Figure 8 As shown, the assembly assembly 5 includes a fastener material distribution cylinder 51, an assembly channel 52, a fastener station transfer assembly 53, a nut assembly push cylinder 54 and a baffle bending assembly 55. The fastener material distribution cylinder 51 pushes the fastener 98 at the end of the fastener straight vibrator 42 to the head end of the assembly channel 52. Specifically, as shown in FIG. Figure 9 As shown, the fastener 98 at the end of the fastener straight vibrator 42 first enters the fastener receiving groove 5111 of the fastener material distribution push plate 511, and then the fastener material distribution cylinder 51 drives the fastener material distribution push plate 511 forward (at Figure 9 The fastener 98 in the fastener receiving groove 5111 is moved to the head end of the assembly channel 52. For example, two fastener receiving grooves 5111 are formed on the fastener material distribution push plate 511, so that the fastener material distribution cylinder 51 can transfer two fasteners 98 each time it moves. Figure 8 As shown, the structural principle of the fastener station transfer assembly 53 is the same as that of the nut station transfer assembly 24. The fastener station transfer assembly 53 moves the fastener 98 located on the assembly channel 52 to the right (at Figure 8 ) transfer from one workstation to another, such as Figure 8As shown, the qualified nut 99 is transported to the left in the transfer channel 3, and the nut assembly pushing cylinder 54 drives the ejector rod to push the nut 99 at the end of the transfer channel 3 forward into the fastener 98 on the assembly channel 52. In other words, the nut input path mentioned above includes the test channel 22 and the transfer channel 3. The fastener 98 loaded with the nut 99 is then transferred to the corresponding station of the baffle bending assembly 55 by the fastener station transfer assembly 53, as shown in FIG. Figure 10 As shown, the baffle bending assembly 55 includes a pressure rod 551, a pressure rod driving cylinder 552, a top plate rod 553 and a top plate cylinder 554. The pressure rod driving cylinder 552 drives the wedge forward (at Figure 8 98, and the nut 99 is assembled with the fastener 98; then the fastener station transfer assembly 53 transfers the hanging nut assembly to the discharge chute 6.

Claims

1. An automatic assembly device for hanging nuts and nut buckles for microwave ovens, comprising an assembly component (5) for inserting a nut (99) into a fastener (98), the assembly component (5) being connected to a nut input path, characterized in that: A nut testing device (2) is provided on the nut input path, and the nut testing device (2) includes a threaded testing assembly (23) and a testing groove (22) for adapting the sliding of the nut (99), and the threaded testing assembly (23) includes a screw lifting cylinder (231), a lifting seat (232), a motor (233), a testing shaft (234), and a testing screw (235) for screwing into the threaded hole (991) of the nut (99) on the testing groove (22), the testing shaft (234) is rotatably connected to the lifting seat (232), the motor (233) is installed on the lifting seat (232), the screw lifting cylinder (231) drives the lifting seat (232) to move up and down, and the motor (233) drives the testing shaft (234) to rotate. The upper end of the test screw (235) is integrally connected with a handle (2350), the handle (2350) is connected to the test shaft (234) in a sliding manner relative to each other, the test shaft (234) and the handle (2350) are circumferentially positioned relative to each other, the threaded test assembly (23) includes a compression spring (238), the compression spring (238) is connected to the handle (2350), the handle (2350) can move upward relative to the test shaft (234) to elastically compress and deform the compression spring (238), the threaded test assembly (23) includes a test in place proximity switch (236) for detecting the lower end of the handle (2350); and also includes a control system, the control system is electrically connected to the test in place proximity switch (236).

2. The automatic assembly equipment for hanging nuts and nut buckles for microwave ovens according to claim 1, characterized in that: The nut testing device (2) comprises a small-diameter testing assembly (25), wherein the small-diameter testing assembly (25) and the thread testing assembly (23) are arranged along the testing groove (22), the small-diameter testing assembly (25) is provided with a pin (251) for inserting a nut (99) that has been tested by the thread testing assembly (23), the small-diameter testing assembly (25) is provided with a pin lifting cylinder (252), the piston rod of the pin lifting cylinder (252) is relatively fixedly connected to the pin (251), the pin lifting cylinder (252) is provided with a test-in-place magnetic switch (2521), and the control system is electrically connected to the test-in-place magnetic switch (2521).

3. The automatic assembly equipment for hanging nuts and nut buckles for microwave ovens according to claim 2, characterized in that: The invention also includes a transfer channel (3), one end of which is connected to the assembly component (5), and the other end of which is connected to the test channel (22). The nut testing device (2) includes a nut station transfer component (24) for transferring the nut (99) on the test channel (22), and the nut testing device (2) includes a test removal component (26) for laterally pushing the tested nut (99) to the transfer channel (3). The end of the test channel (22) is provided with a defective product discharge port (221), and the control system controls the connection between the nut station transfer component (24) and the test removal component (26).

4. The automatic assembly equipment for hanging nuts and nut buckles for microwave ovens according to claim 1, characterized in that: The upper portion of the handle (2350) is adapted to be coaxially connected to the lower portion of the test shaft (234), the compression spring (238) is disposed in the test shaft (234), and the lower end of the compression spring (238) is abutted against the upper end surface of the handle (2350).

5. The automatic assembly equipment for hanging nuts and nut buckles for microwave ovens according to claim 4, characterized in that: A sliding groove (2341) extending in the up-down direction is formed at the lower portion of the test shaft (234); a limiting pin (237) is screwed onto the handle (2350); and the limiting pin (237) is adapted to slide in the sliding groove (2341).

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