Automatic assembling equipment for hanging nut assembly for microwave oven

Abstract

The utility model discloses automatic assembling equipment for a hanging nut assembly for a microwave oven, which comprises a negative film conveying device, an assembling channel and a feeding device used for transferring negative films from the tail end of the negative film conveying device to the head end of the assembling channel, the conveying device comprises a conveying channel, the tail end of the conveying channel is correspondingly provided with a stopping block used for stopping a negative film, a detection hole is formed in the bottom of the conveying channel, the detection hole is formed in the outer side of the conveying belt, and a reflection type photoelectric sensor used for detecting a transverse notch of the negative film at the tail end of the conveying channel is arranged in the detection hole; the lower side of the rotating stand is provided with an insertion tongue used for being inserted into a top groove of a negative film and a suction cup used for sucking the upper face of the negative film. The negative film direction-correcting rotating air cylinder drives the rotating stand to rotate horizontally. And the control system is electrically connected with the reflective photoelectric sensor and is in control connection with the feeding device. The utility model is favorable for improving the production efficiency.

Description

Technical Field

[0001] The utility model relates to the field of hanging nut component assembly equipment, in particular to automatic assembly equipment for hanging nut components used in microwave ovens. Background Art

[0002] Currently, if Figure 6 As shown, the hanging nut assembly for a microwave oven includes a base plate 99 and a nut 98. The nut 98 is a combined component. The nut 98 is fastened to the base plate 99. The base plate 99 can be fixed to the outer shell of the microwave oven, and the nut 98 can be screwed to the suspension rod. The existing automatic assembly equipment for hanging nut assemblies is used to fasten the nut to the base plate. The equipment is provided with an assembly channel. The base plate and the nut are sorted and output respectively through corresponding vibration plates. The vibration plate corresponding to the base plate outputs the base plate to the conveyor belt. The feeding device transfers the base plate to the assembly channel. The nut assembly pushes the nut horizontally toward the base plate, so that the nut and the base plate are fastened. However, the base plate has directionality. When the vibration plate sorts the base plate, although the base plate with the opposite direction can be screened back into the vibration plate by the screening structure of the vibration plate, the output quantity of the base plate per unit time is small, which is not conducive to improving production efficiency. Therefore, it is necessary to improve the existing automatic assembly equipment for hanging nut assemblies. Summary of the Invention

[0003] The purpose of the utility model is to overcome the deficiencies of the prior art and provide a device for automatically assembling a hanging nut assembly for a microwave oven, which is conducive to improving production efficiency.

[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 nut components for microwave ovens, comprising a film conveying device, an assembly channel and a loading device for transferring the film from the end of the film conveying device to the head end of the assembly channel, wherein the film conveying device comprises a conveying trough and a conveyor belt, the end of the conveying trough is correspondingly provided with a blocking block for blocking the film, the bottom of the conveying trough is formed with a detection hole, the detection hole is provided on the outside of the conveyor belt, a reflective photoelectric sensor for detecting the transverse notch of the film at the end of the conveying trough is provided in the detection hole, the loading device comprises a rotating frame and a film correcting rotating cylinder, the lower side of the rotating frame is provided with an inserting tongue for inserting into the top groove of the film and a suction cup for holding the top of the film, the film correcting rotating cylinder drives the rotating frame to rotate horizontally; and also includes a control system, the control system is electrically connected to the reflective photoelectric sensor, and the control system controls the connection to the loading device.

[0006] Preferably, the loading device includes a lifting seat, a suction cup lifting cylinder, a transverse seat and a transverse cylinder. The transverse cylinder drives the transverse seat to move laterally. The lifting seat is connected to the transverse seat for sliding up and down. The suction cup lifting cylinder drives the lifting seat to move up and down. The film correction rotation cylinder is installed on the lifting seat. The turntable is rotatably connected to the lifting seat. The number of the suction cups is set to two, and the tongue is set between the two suction cups.

[0007] Preferably, the upper portion of the inserting tongue is inserted into the rotating frame, and the inserting tongue and the rotating frame are relatively fixedly connected by screws.

[0008] Preferably, the automatic assembly equipment of the hanging nut assembly for microwave ovens of the present invention also includes a bottom film pushing device for pushing the bottom film at the head end of the assembly channel to the assembly station of the assembly channel; it also includes a bottom film positioning device, the bottom film positioning device includes a positioning fork for clamping the waist notch of the bottom film at the assembly station, the bottom film positioning device includes a positioning fork lifting cylinder, and the positioning fork lifting cylinder drives the positioning fork to move up and down.

[0009] Preferably, the positioning fork lifting cylinder is arranged below the assembly channel, and the positioning fork passes through the bottom of the assembly channel.

[0010] Preferably, the bottom film positioning device includes a positioning bar for abutting against the bottom of the transverse notch of the bottom film, and the positioning fork lifting cylinder drives the positioning bar to move up and down.

[0011] Compared with the prior art, the utility model has the following beneficial effects: a detection hole is formed at the bottom of the conveying trough, a reflective photoelectric sensor for detecting the transverse notch of the film at the end of the conveying trough is provided in the detection hole, the loading device includes a turntable and a film correction rotation cylinder, a suction cup for holding the top of the film is provided on the lower side of the turntable, the film correction rotation cylinder drives the turntable to rotate horizontally, the control system is electrically connected to the reflective photoelectric sensor, and the control system controls the connection loading device to realize simple and quick correction of the direction of the film, thereby helping to improve production efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 The utility model is a three-dimensional structural diagram of the automatic assembly equipment of the hanging nut assembly for microwave ovens.

[0013] Figure 2 for Figure 1 Schematic diagram of the local structure at point A.

[0014] Figure 3 It is a schematic diagram of the three-dimensional structure of the feeding device of the present utility model.

[0015] Figure 4It is a schematic diagram of the three-dimensional structure of the negative film pushing device of the present invention.

[0016] Figure 5 It is a schematic diagram of the three-dimensional structure of the negative film positioning device and the negative film combination of the present invention.

[0017] Figure 6 Schematic diagram of the exploded view of the hanging nut assembly.

[0018] Explanation of reference numerals: negative film vibration plate 1; negative film conveying device 2; conveying trough 21; blocking block 211; detection hole 212; conveyor belt 22; conveyor belt motor 23; transmission belt 24; feeding device 3; insert tongue 31; suction cup 32; turntable 33; screw mounting hole 331; negative film direction correction rotation cylinder 34; lifting seat 35; suction cup lifting cylinder 36; transverse seat 37; transverse cylinder 38; negative film pushing device 4; pushing plate 41; pushing cylinder 42; negative film positioning device 5; positioning fork 51; positioning bar 52; positioning fork lifting cylinder 53; support 54; nut mounting assembly 6; push rod 61; assembly channel 7; negative film 99; transverse notch 991; insert 992; top groove 993; waist notch 994; nut 98; groove foot 981. DETAILED DESCRIPTION

[0019] The present invention will be further described below in conjunction with the accompanying drawings.

[0020] The utility model is a device for automatically assembling a hanging nut assembly for a microwave oven, such as Figure 1 and Figure 2 As shown, it includes a film conveying device 2, an assembly channel 7 and a loading device 3 for transferring the film 99 from the end of the film conveying device 2 to the head end of the assembly channel 7, as shown in FIG. Figure 3 As shown, the film conveying device 2 includes a conveying trough 21 and a conveyor belt 22. The end of the conveying trough 21 is provided with a corresponding blocking block 211 for blocking the film 99. The upper part of the conveyor belt 22 is abutted against the bottom of the conveying trough 21, that is, the bottom of the conveying trough 21 supports the upper part of the conveyor belt 22. The two ends of the conveying trough 21 are respectively provided with corresponding rotating support rollers. The conveyor belt 22 is sleeved outside the support rollers, that is, the support rollers tension the conveyor belt 22. The film conveying device 2 also includes a conveyor belt motor 23. The conveyor belt motor 23 drives the corresponding support rollers mentioned above through the transmission belt, so that the support rollers drive the conveyor belt 22 to operate. The output end of the film vibration plate 1 is connected to the head end of the conveying trough 21. As shown Figure 3 As shown, a detection hole 212 is formed at the bottom of the conveying trough 21. The detection hole 212 is located outside the conveyor belt 22. A reflective photoelectric sensor for detecting the transverse notch 991 of the bottom film 99 at the end of the conveying trough 21 is located in the detection hole 212, so that the conveyor belt 22 will not block the reflective photoelectric sensor. Figure 4As shown, the feeding device 3 includes a rotating rack 33 and a bottom film correcting rotation cylinder 34. The lower side of the rotating rack 33 is provided with an inserting tongue 31 for inserting into the top groove 993 of the bottom film 99 and a suction cup 32 for holding the top of the bottom film 99. The bottom film correcting rotation cylinder 34 drives the rotating rack 33 to rotate horizontally; the automatic assembly equipment of the hanging nut assembly for microwave ovens of the present invention also includes a control system, which is electrically connected to the reflective photoelectric sensor, and the control system controls the connection of the feeding device 3.

[0021] The following briefly describes the working principle of the automatic assembly equipment for hanging nut components for microwave ovens of the present invention: Figure 1 As shown, the film vibration plate 1 arranges and outputs the film 99 to the head end of the conveying trough 21, and the conveyor belt 22 drives the film 99 to move in the conveying trough 21. When the film 99 moves to the end of the conveying trough 21, it will be blocked by the blocking block 211. The film 99 queue in the conveying trough 21 and the conveyor belt 22 slip briefly, as shown in FIG. Figure 6 As shown, the bottom plate 99 is formed with a transverse notch 991, as shown in FIG. Figure 3 As shown, if the film 99 is in the correct direction, the transverse notch 991 will not block the detection light emitted upward by the reflective photoelectric sensor, and the reflective photoelectric sensor will not be triggered. The loading device 3 drives the rotating frame 33 to move above the end of the conveying trough 21, and the loading device 3 moves the tongue 31 and the suction cup 32 downward, as shown in FIG. Figure 6As shown, a top groove 993 is formed on the bottom film 99, and the top groove 993 is located between the two inserting pieces 992. The inserting tongue 31 is inserted into the top groove 993, and at the same time, the suction cup 32 is pressed against the top of the bottom film 99. The suction cup 32 holds the bottom film 99 by negative pressure, and the loading device 3 drives the bottom film 99 held by the suction cup 32 to move to the top of the head end of the assembly channel 7. The bottom film 99 in the conveying trough 21 is restored to move toward the blocking block 211, and then the loading device 3 lowers the bottom film 99 to the assembly channel 7, the suction cup 32 releases the bottom film 99, and the loading device 3 moves the rotating frame 33 up and resets it, and so on. However, if the direction of the bottom film 99 at the end of the conveying trough 21 is reversed (horizontally reversed 180°), that is, the bottom film 99 The transverse notch 991 is located on the opposite side of the detection hole 212, so the film 99 will block the detection light emitted upward by the reflective photoelectric sensor, and the reflective photoelectric sensor will be triggered. The control system senses that the direction of the film 99 at the end of the conveying channel 21 is reversed according to the connection signal of the reflective photoelectric sensor. When the loading device 3 moves the turntable 33 upward, the control system will control the film correction rotating cylinder 34 to drive the turntable 33 to rotate 180°, so that the film 99 returns to the correct direction. After that, the loading device 3 puts the film 99 on the assembly channel 7 again. After the turntable 33 moves up and resets, the control system controls the film correction rotating cylinder 34 to drive the turntable 33 to reset and rotate 180°. As can be seen from the above, the present invention can ensure that the negative films 99 placed on the assembly channel 7 have the correct direction by setting the above-mentioned feeding device 3 in combination with the reflective photoelectric sensor, so that the screening structure of the negative film vibration disk 1 can be simplified. The negative film vibration disk 1 can output negative films 99 in both positive and negative directions, which is beneficial to increase the number of negative films 99 output by the negative film vibration disk 1 per unit time, and the direction of the negative film 99 is corrected by the negative film correction rotating cylinder 34. The action is simple and fast, and the effect on the transfer efficiency of the negative film 99 is not obvious. Therefore, the automatic assembly equipment of the hanging nut assembly for microwave ovens of the present invention is beneficial to improving production efficiency. When the inserting tongue 31 is inserted into the top groove 993 on the bottom film 99, there is a gap between the inserting tongue 31 and the top groove 993. Since the bottom film 99 at the end of the conveying channel 21 is positioned by the blocking block 211 and the side wall of the conveying channel 21, the inserting tongue 31 will not collide with the edge of the top groove 993. However, it can prevent the top groove 993 and the inserting tongue 31 from significantly rotating and shifting. The inserting tongue 31 can prevent the bottom film 99 from significantly rotating and slipping relative to the suction cup 32 when the bottom film correcting rotating cylinder 34 reverses the bottom film 99 at a high speed, thereby preventing the bottom film 99 from being significantly skewed when placed on the assembly channel 7.

[0022] like Figure 1 and Figure 2As shown, the automatic assembly equipment for hanging nut components for microwave ovens includes a nut assembly 6, which includes a push rod 61, a nut vibration plate and a nut distribution mechanism. The nuts 98 are sorted by the nut vibration plate and output to the nut distribution mechanism. The nut distribution mechanism pushes the nuts 98 to the corresponding position of the push rod 61. The push rod 61 pushes the nuts 98 to the bottom plate 99 on the assembly channel 7. Figure 6 As described above, the nut 98 is formed with a groove foot 981 , and specifically, the insert piece 992 of the bottom plate 99 is relatively inserted into the corresponding groove foot 981 , so that the bottom plate 99 and the nut 98 are buckled together.

[0023] Further, if Figure 4 As shown, the loading device 3 includes a stand, a lifting seat 35, a suction cup lifting cylinder 36, a transverse seat 37 and a transverse cylinder 38. The transverse seat 37 is connected to the support through a corresponding linear guide pair. The transverse cylinder 38 drives the transverse seat 37 to move laterally (that is, perpendicular to the direction in which the film 99 is transferred by the conveyor belt 22). Specifically, the end of the piston rod of the transverse cylinder 38 is installed and connected to the transverse seat 37. The moving direction of the film 99 in the assembly channel 7 is parallel to the moving direction of the film 99 on the conveyor belt 22. The lifting seat 35 is connected to the transverse seat 37 by sliding up and down through the corresponding linear guide pair. On the shift seat 37, the suction cup lifting cylinder 36 drives the lifting seat 35 to move up and down. The cylinder body of the suction cup lifting cylinder 36 is installed on the transverse shift seat 37. The negative film correcting rotation cylinder 34 is installed on the lifting seat 35. The rotating frame 33 is rotatably connected to the lifting seat 35 through a bearing. The rotation axis of the rotating frame 33 is along the up and down direction. The output shaft of the negative film correcting rotation cylinder 34 is connected to the rotating frame 33 through a coupling. The number of suction cups 32 is set to two, and the insert tongue 31 is set between the two suction cups 32, so that the two suction cups 32 can respectively hold the left and right parts of the negative film 99 (at Figure 4 Under the visual field), it is conducive to reliably holding the film 99, and the structure of the feeding device 3 is relatively simple and the cost is low.

[0024] Furthermore, the upper portion of the tongue 31 is inserted into the rotating frame 33, and the tongue 31 and the rotating frame 33 are relatively fixedly connected by screws, such as Figure 4 As shown, a screw mounting hole 331 is formed on the rotating frame 33, and a screw is installed in the screw mounting hole 331. The screw can be a set screw. The end of the set screw presses against the surface of the tongue 31, thereby fixing the tongue 31 relative to the rotating frame 33. When the lower end of the tongue 31 is worn, the set screw is loosened, and the tongue 31 can be pulled downward and replaced.

[0025] Further, if Figure 1As shown, the automatic assembly equipment for hanging nut components for microwave ovens of the present invention further includes a bottom film pushing device 4 for pushing the bottom film 99 at the head end of the assembly channel 7 to the assembly station of the assembly channel 7; the bottom film pushing device 4 includes a pushing plate 41 and a pushing cylinder 42, the pushing plate 41 is arranged to slide linearly, and the piston rod of the pushing cylinder 42 is installed and connected to one end of the pushing plate 41; the automatic assembly equipment for hanging nut components for microwave ovens of the present invention further includes a bottom film positioning device 5, as shown Figure 5 As shown, the film positioning device 5 includes a positioning fork 51 for engaging the waist notch 994 of the film 99 at the assembly station. The positioning fork 51 includes two fork bars. The film positioning device 5 includes a positioning fork lifting cylinder 53. The positioning fork lifting cylinder 53 drives the positioning fork 51 to move up and down. Specifically, the film positioning device 5 includes a support 54. The support 54 is arranged to slide up and down. The piston rod of the positioning fork lifting cylinder 53 is connected to the lower end of the support 54. The positioning fork 51 is fixed to the top of the support 54 (which can be welded). Figure 1 and Figure 2 As shown, when the feeding device 3 places the film 99 on the head end of the assembly channel 7, the film 99 triggers the photoelectric switch corresponding to the head end of the assembly channel 7. The control system controls the push cylinder 42 to drive the push plate 41 to move left (at Figure 2 The control system then controls the positioning fork lift cylinder 53 to move the positioning fork 51 upward, and the two prongs of the positioning fork 51 are respectively inserted into the waist notches 994 of the bottom plate 99 at the assembly station. That is, the positioning fork 51 engages the waist notches 994, preventing the bottom plate 99 from slipping within the assembly channel 7. The push rod 61 of the nut assembly 6 then pushes the nut 98 toward the bottom plate 99 at the assembly station. The positioning fork lift cylinder 53 then drives the positioning fork 51 downward to reset. The push plate 41 then pushes the next bottom plate 99 to the assembly station. The next bottom plate 99 pushes the previously assembled "microwave oven hanging nut assembly" (including the bottom plate 99 and nut 98) to the left. By providing the positioning fork 51 to position the bottom plate 99 before assembling the nut 98 with the bottom plate 99, accurate alignment of the nut 98 with the bottom plate 99 is facilitated, facilitating a stable assembly process.

[0026] Furthermore, if Figure 2 As described above, the positioning fork lifting cylinder 53 is arranged below the assembly channel 7, and the positioning fork 51 passes through the bottom of the assembly channel 7, thereby avoiding the positioning fork lifting cylinder 53 and the support 54 blocking the line of sight, making it convenient for workers to check the assembly status of the nut 98 and the film 99 from above.

[0027] Furthermore, if Figure 5As shown, the film positioning device 5 includes a positioning bar 52 for abutting the bottom of the transverse notch 991 of the film 99. The positioning bar 52 is fixed to the top of the support 54. The positioning fork lifting cylinder 53 drives the positioning bar 52 to move up and down. When the positioning fork 51 engages the waist notch 994, the positioning bar 52 also moves up against the bottom of the transverse notch 991 at the same time, thereby enhancing the positioning effect of the film 99 on the assembly station.

Claims

1. An automatic assembly device for a hanging nut assembly for a microwave oven, comprising a film conveying device (2), an assembly channel (7), and a loading device (3) for transferring a film (99) from the rear end of the film conveying device (2) to the front end of the assembly channel (7), characterized in that: The film conveying device (2) includes a conveying trough (21) and a conveying belt (22). A blocking block (211) for blocking the film (99) is correspondingly provided at the end of the conveying trough (21). A detection hole (212) is formed at the bottom of the conveying trough (21). The detection hole (212) is provided on the outside of the conveying belt (22). A reflective photoelectric sensor for detecting the transverse notch (991) of the film (99) at the end of the conveying trough (21) is provided in the detection hole (212). The feeding device (3) includes a rotating frame (33) and a negative film correcting rotation cylinder (34), the lower side of the rotating frame (33) is provided with an inserting tongue (31) for inserting into the top groove (993) of the negative film (99) and a suction cup (32) for sucking the upper surface of the negative film (99), and the negative film correcting rotation cylinder (34) drives the rotating frame (33) to rotate horizontally; and also includes a control system, the control system is electrically connected to the reflective photoelectric sensor, and the control system controls the connection to the feeding device (3).

2. The automatic assembly equipment for hanging nut components for microwave ovens according to claim 1, characterized in that: The loading device (3) includes a lifting seat (35), a suction cup lifting cylinder (36), a transverse seat (37) and a transverse cylinder (38), wherein the transverse cylinder (38) drives the transverse seat (37) to move transversely, the lifting seat (35) is connected to the transverse seat (37) by sliding up and down, the suction cup lifting cylinder (36) drives the lifting seat (35) to move up and down, the negative film correction rotation cylinder (34) is installed on the lifting seat (35), the rotating frame (33) is rotatably connected to the lifting seat (35), the number of the suction cups (32) is set to two, and the inserting tongue (31) is provided between the two suction cups (32).

3. The automatic assembly equipment for hanging nut components for microwave ovens according to claim 2, characterized in that: The upper portion of the inserting tongue (31) is inserted into the rotating frame (33), and the inserting tongue (31) and the rotating frame (33) are relatively fixedly connected by screws.

4. The automatic assembly equipment for hanging nut components for microwave ovens according to claim 3, characterized in that: The invention also includes a film pushing device (4) for pushing the film (99) at the head end of the assembly channel (7) to the assembly station of the assembly channel (7); and a film positioning device (5), wherein the film positioning device (5) includes a positioning fork (51) for clamping the waist notch (994) of the film (99) at the assembly station, and the film positioning device (5) includes a positioning fork lifting cylinder (53), wherein the positioning fork lifting cylinder (53) drives the positioning fork (51) to move up and down.

5. The automatic assembly equipment for hanging nut components for microwave ovens according to claim 4, characterized in that: The positioning fork lifting cylinder (53) is arranged below the assembly channel (7), and the positioning fork (51) passes through the bottom of the assembly channel (7).

6. The automatic assembly equipment for hanging nut components for microwave ovens according to claim 5, characterized in that: The film positioning device (5) includes a positioning bar (52) for abutting against the bottom of the transverse notch (991) of the film (99), and the positioning fork lifting cylinder (53) drives the positioning bar (52) to move up and down.

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