Nut feeding machine and nut feeding method

Abstract

This invention belongs to the technical field of passive gear manufacturing, specifically relating to a nut feeder and method for a passive gear screw-tightening production line. The nut feeder includes a nut hopper connected to a nut supply chamber via a conveyor line. A nut feeding mechanism is located within the feeding chamber, connected to the M end of a nut track. The N end of the nut track is connected to a nut feeding disc, which is rotatably connected within a nut feeding rack. At least one nut supply chamber is located on the edge of the nut feeding disc, with its opening communicating with the N end of the nut track. The outline of the nut supply chamber matches the outline of the nut. Beneficial effects: Compared to existing technologies, this invention provides a nut feeder that can continuously supply nuts, facilitating the passive gear screw-tightening production line.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of passive gear production, and particularly relates to a nut feeding machine for a passive gear screwing assembly line. BACKGROUND

[0002] In the production process of passive gears, carburizing needs to be performed. In order to prevent the carburizing of the threaded hole, the threaded hole needs to be plugged. When plugging, the screw needs to be screwed into the threaded hole.

[0003] At present, in the assembly line operation, a suitable nut feeding machine is needed. SUMMARY

[0004] The technical problem to be solved by the application is how to design a passive gear screwing assembly line to reduce the dependence on manual labor.

[0005] The specific scheme is as follows:

[0006] A nut feeding machine comprises a nut stock bin, the nut stock bin is connected with a feeding chamber through a conveying line, a nut feeding mechanism is arranged in the feeding chamber, the nut feeding mechanism is connected with an M end of a nut track, an N end of the nut track is connected with a nut feeding disc, the nut feeding disc is rotationally connected in a nut feeding frame, at least one nut feeding chamber is arranged on the edge of the nut feeding disc, the opening of the nut feeding chamber is communicated with the N end of the nut track, and the contour outside of the nut feeding chamber is matched with the contour outside of the nut.

[0007] The nut feeding mechanism comprises a feeding ring, the feeding ring is vertically arranged and rotationally connected to one side of the feeding chamber close to the nut stock bin, a plurality of arc-shaped plates are arranged on the inner wall of the feeding ring, the space between the inner wall of the feeding ring and the arc-shaped plates is a nut temporary storage chamber, and the M end of the nut track is inserted into the hollow portion of the feeding ring.

[0008] A rotating shaft is rotationally connected in the feeding chamber, a scraper is fixed to the rotating shaft, and the scraper is located downstream of the feeding ring and above the nut track.

[0009] The nut track comprises two track bodies, the space between the two track bodies is a nut conveying cavity, and a nut transmission belt is arranged in the nut conveying cavity of the M end of the nut track.

[0010] The track body at the position of the nut transmission belt is a nut cap matching portion, and the upper surface of the nut cap matching portion is not lower than the upper surface of the nut cap of the nut.

[0011] The track body below the scraper comprises a nut cap matching portion and a stud matching portion, and the upper surface of the nut cap matching portion is not lower than the upper surface of the nut cap of the nut.

[0012] A flow guide inclined plate is fixed to the bottom plate of the feeding chamber, and the lowest part of the flow guide inclined plate is higher than the lowest part of the hollow portion of the feeding ring.

[0013] The edge of the nut feeding tray is provided with at least a pair of symmetrical nut supply chambers, one of which is engaged with the nut track, and the other nut supply chamber is engaged with the suction chamber.

[0014] A method for feeding nuts, using the aforementioned nut feeding machine, includes the following steps:

[0015] S30. Nuts in the nut hopper continuously or intermittently enter the nut supply chamber through the conveyor line, and the nut feeding mechanism needs to be supplied with enough nuts.

[0016] S31. The nut from step S30 passes through the guide plate and enters the lowest part of the hollow section of the feeding ring.

[0017] S32, at least one nut from step S31 enters the nut storage chamber at the lowest point of the feeding ring;

[0018] S33. The feeding ring rotates, and the nut is gradually raised until it reaches a high position and is thrown down.

[0019] S34. The feeding ring rotates, and the dropped nuts enter the nut conveying chamber at the M end of the nut track;

[0020] S35. After the nuts hit the pad, some nuts will fall out of the nut conveying chamber and fall into the nut storage chamber at the lowest point of the material ring. Repeat steps S33 and S34. Some nuts will remain stable in the nut conveying chamber.

[0021] S36. The nut, which is stable in the nut conveying cavity, moves downstream under the drive of the nut transmission belt;

[0022] S37. After the nut disengages from the nut drive belt and falls onto the track body, the nut is divided into a nut with the correct posture and a nut with the incorrect posture.

[0023] S38. Both the nuts with the correct orientation and the nuts with the incorrect orientation gradually move to the bottom of the scraper 423 under the continuous squeezing of the upstream nut.

[0024] S39. Driven by external force, the rotating shaft and scraper swing back and forth. The scraper knocks the nuts with incorrect posture off the track body. After being guided by the guide plate, the nuts enter the lowest part of the hollow part of the feeding ring. The position occupied by the nuts is occupied by the nuts with correct posture upstream. Finally, the nuts with correct posture line up and move downstream. The power of the movement comes from the continuous squeezing of the upstream nuts.

[0025] S40. The foremost nut enters the nut supply chamber. The nut feeding plate rotates at a certain angle, and the nut moves to the feeding station, where it can cooperate with the suction chamber.

[0026] S41, End.

[0027] Beneficial effects: Compared with the prior art, the present invention has a nut feeder that can continuously supply nuts, providing convenience for the passive gear screw tightening production line. Attached Figure Description

[0028] Figure 1 This is a schematic diagram of an assembly line.

[0029] Figure 2 This is an enlarged schematic diagram of a screw-tightening machine.

[0030] Figure 3 This is a top view of the screw-tightening station.

[0031] Figure 4 This is a top view of a screw feeder.

[0032] Figure 5 This is a schematic diagram of the rotating drum.

[0033] Figure 6 yes Figure 4 A cross-sectional view along line A-A.

[0034] Figure 7 This is a top view of the feeding track.

[0035] Figure 8 This is a side view of the feeding track.

[0036] Figure 9 This is a cross-sectional schematic diagram of the feeding track. Detailed Implementation

[0037] The technical solutions in the embodiments of the present invention will now be clearly and completely described with reference to the accompanying drawings.

[0038] like Figure 1 A passive gear screw tightening production line includes a conveyor belt 100, a gear feeding mechanism at the upstream of the conveyor belt 100, a gear unloading mechanism at the downstream of the conveyor belt 100, and a screw tightening machine 500 and a nut feeding machine 400 on its side.

[0039] The gear feeding mechanism includes a transfer robot 200 and an attitude adjustment mechanism 210. The attitude adjustment mechanism 210 is located between the conveyor belt 100 and the transfer robot 200. The clamping component of the transfer robot 200 is an electromagnet 201. The attitude adjustment mechanism 210 includes a frame A210. The top of the frame A210 is hinged to an intermediate plate 211. The intermediate plate 211 is smaller than the gear, and one edge of it is fixed with a baffle 212.

[0040] The gear unloading mechanism includes a transfer robot 200 and an attitude adjustment mechanism 210. The attitude adjustment mechanism 210 is located between the conveyor belt 100 and the transfer robot 200. The clamping component of the transfer robot 200 is an electromagnet 201. The attitude adjustment mechanism 210 includes a frame A210. The top of the frame A210 is hinged to an intermediate plate 211. The intermediate plate 211 is smaller than the gear, and one edge of it is fixed with a baffle 212.

[0041] In the passive gear transportation process, a loading carriage 900 and a unloading carriage 901 are used. The passive gears on the loading carriage 900 and the unloading carriage 901 are in an upright position (that is, the axis of the passive gear is in the horizontal plane), while the passive gear at the screw tightening station is in a horizontal position (that is, the axis of the passive gear is in the vertical plane). In order to adjust the posture of the passive gear, a posture adjustment mechanism 210 is designed between the conveyor belt 100 and the transfer robot 200, which reduces the degree of freedom requirement of the robotic arm of the transfer robot 200.

[0042] like Figure 2 The tail end of the robot arm 510 of the screw tightening machine 500 is fixed with a rotary motor 511. The output shaft of the rotary motor 511 is fixed with a suction chamber 512. The suction chamber 512 is used to fix the nut (see attached reference numeral 998). The outer contour of the suction chamber 512 matches the outer contour of the nut.

[0043] like Figure 3 A screw-tightening station 101 is provided at a certain section of the conveyor belt 100. The screw-tightening station 101 is provided with two V-shaped frames: a first V-shaped frame 102 and a second V-shaped frame 103. The first V-shaped frame 102 is fixed to the screw-tightening station 101. The screw-tightening station 101 fixes the cylinder end of the hydraulic cylinder 110. The piston end of the hydraulic cylinder 110 is fixed to the second V-shaped frame 103 through the connecting seat 111. The gear (see attached reference numeral 912) is located between the two V-shaped frames.

[0044] like Figures 3-4 The nut feeder 400 includes a nut hopper 410, which is connected to a feeding chamber 420 via a conveyor line 411. The feeding chamber 420 is equipped with a nut feeding mechanism 430, which is connected to the M end of a nut track 440. The N end of the nut track 440 is connected to a nut feeding disc 451, which is rotatably connected to the nut feeding rack 450. At least one nut supply chamber 452 is provided on the edge of the nut feeding disc 451. The opening of the nut supply chamber 452 communicates with the N end of the nut track 440, and the outline of the nut supply chamber 452 matches the outline of the nut.

[0045] like Figure 4The nut feeding mechanism 430 includes a feeding ring 431, which is vertically arranged and rotatably connected to the side of the feeding chamber 420 near the nut hopper 410. Multiple arc-shaped plates 432 are provided on the inner wall of the feeding ring 431. The space between the inner wall of the feeding ring 431 and the arc-shaped plates 432 is the nut storage chamber 4321. The M end of the nut track 440 is inserted into the hollow part of the feeding ring 431.

[0046] like Figure 4 The edge of the nut feeding tray 451 is provided with at least a pair of symmetrical nut supply chambers 452, one of which is engaged with the nut track 440, and the other nut supply chamber 45 is engaged with the suction chamber 512.

[0047] like Figure 6 A rotating shaft 422 is rotatably connected inside the feeding chamber 420. The rotating shaft 422 fixes the scraper 423, which is located downstream of the feeding ring 431 and above the nut track 440.

[0048] like Figures 7-8 The nut track 440 includes two track bodies 4404, and the space between the two track bodies 4404 is a nut conveying cavity 4403. A nut transmission belt 441 is provided in the nut conveying cavity 4403 at the M end of the nut track 440.

[0049] like Figures 7-8 To facilitate the storage of the nut, the track body 4404 at the nut drive belt 441 is a nut mating part 4401, and the upper surface of the nut mating part 4401 is not lower than the upper surface of the nut (see attached reference numeral 995).

[0050] like Figures 7-9 The track body 4404 below the scraper 423 includes a nut mating part 4401 and a stud mating part 4402. The upper surface of the nut mating part 4401 is not lower than the upper surface of the nut (see reference numeral 995).

[0051] like Figure 6 A guide plate 421 is fixed on the bottom plate of the feeding chamber 420, and the lowest point of the guide plate 421 is higher than the lowest point of the hollow part of the feeding ring 431.

[0052] Its specific working process is as follows:

[0053] like Figures 1-3 The operation of the passive gear screw tightening assembly line includes the following steps:

[0054] S10, loading cart 900 and unloading cart 901 are all in place.

[0055] S11. The electromagnet 201 of the transfer robot 200 of the gear feeding mechanism runs above the gear (see reference numeral 901) of the feeding car 900, and the electromagnet 201 is energized to pick up the gear (see reference numeral 910).

[0056] S12, the intermediate plate 211 of the gear feeding mechanism rotates to a vertical position, the electromagnet 201 of the transfer robot 200 of the gear feeding mechanism moves to the top of the baffle 212, the electromagnet 201 is de-energized, and the gear (see attached reference numeral 911) falls on the intermediate plate 211 and the baffle 212.

[0057] S13, the intermediate plate 211 rotates to a horizontal position, the gear is also in a horizontal position, the electromagnet 201 is energized and picks up the gear in the horizontal position, the electromagnet 201 of the transfer robot 200 of the gear loading mechanism runs above the conveyor belt 100, the electromagnet 201 is de-energized, and the gear falls onto the conveyor belt 100.

[0058] S14. The conveyor belt 100 starts. Under the transport of the conveyor belt 100, the second V-shaped frame 103 is located at the far end, the gear (see attached reference numeral 912) runs to the screw tightening station 101, and the conveyor belt 100 is turned off.

[0059] S15, the piston end of the hydraulic cylinder 110 extends, causing the second V-shaped frame 103 to move to the near end, clamping the gear (see reference numeral 912 in the figure) between the second V-shaped frame 103 and the first V-shaped frame 102.

[0060] S16. The nut feeder 400 conveys the nuts (see attached reference 999) out, and the screw tightening machine 500 controls the suction chamber 512 to run above the nuts (see attached reference 999), and the suction chamber 512 sucks in the nuts (see attached reference 998).

[0061] S17. The screw tightening machine 500 controls the intake chamber 512 to run above the target screw hole of the gear (see attached reference 912). The rotary motor 511 rotates, driving the intake chamber 512 and the nut (see attached reference 998) to be screwed into the target screw hole.

[0062] S18. Repeat steps S16-S17 until all the screw holes of the gear (see attached figure 912) are completed.

[0063] S19, the piston end of the hydraulic cylinder 110 retracts, releasing the gear (see attached reference numeral 912).

[0064] S20, the conveyor belt 100 starts, and under the transport of the conveyor belt 100, the gear (see attached reference numeral 913) gradually reaches the tail end of the conveyor belt 100.

[0065] S21. When the electromagnet 201 of the transfer robot 200 of the gear unloading mechanism moves to the top of the tail end of the conveyor belt 100, the electromagnet 201 is energized and picks up the gear.

[0066] S22. The intermediate plate 211 of the gear feeding mechanism rotates to a horizontal position, the electromagnet 201 is de-energized, and the gear is placed on the intermediate plate 211.

[0067] S23, the intermediate plate 211 of the gear feeding mechanism rotates to a vertical position, and the gear (see attached reference numeral 913) is also in a vertical position and is stable on the intermediate plate 211 and the baffle 212.

[0068] S24. The electromagnet 201 of the transfer robot 200 of the gear unloading mechanism is energized, and the gear (see attached reference numeral 913) is picked up.

[0069] S25. The electromagnet 201 of the transfer robot 200 of the gear unloading mechanism moves together with the gear (see reference numeral 913) to the gear void position above the unloading carriage 901. The electromagnet 201 is de-energized and places the gear (see reference numeral 913) into the unloading carriage 901.

[0070] S26, End.

[0071] like Figures 4-9 The 400 nut feeder operates as follows:

[0072] S30. Nuts in the nut hopper 410 are continuously or intermittently fed into the nut supply chamber 420 via the conveyor line 411, requiring sufficient nuts to be supplied to the nut feeding mechanism 430.

[0073] S31, such as Figure 6 In step S30, the nut (see reference numeral 994 in the attached drawing) passes through the guide plate 421 and enters the lowest part of the hollow section of the feeding ring 431.

[0074] S32, such as Figure 5 In step S31, at least one nut (see reference numeral 991) enters the nut storage chamber 4321 at the lowest point of the feeding ring 431.

[0075] S33, such as Figure 5 The feeding ring 431 rotates, and the nut (see attached drawing 992) is gradually raised until it reaches a high position and is dropped.

[0076] S34, such as Figure 5 The feeding ring 431 rotates, and the dropped nuts (see attached drawing 993) enter the nut conveying chamber 4403 at the M end of the nut track 440.

[0077] S35, such as Figure 5 andFigure 7 After the nuts hit the pad block 443, some nuts will fall out of the nut conveying chamber 4403 (due to reasons such as being too far off-center). These nuts will fall into the nut storage chamber 4321 at the lowest point of the material ring 431, and repeat steps S33 and S34; while some nuts will remain stable in the nut conveying chamber 4403.

[0078] S36. The nut, which is stable in the nut conveying cavity 4403, moves downstream under the drive of the nut transmission belt 441.

[0079] S37, such as Figure 6 After the nut disengages from the nut drive belt 441, the nut falls onto the track body 4404. At this time, the nut is divided into a nut with the correct posture (see attached figure 995) and a nut with the incorrect posture (see attached figure 994).

[0080] The nut with the correct orientation refers to: see Figure 9 The nut and stud are respectively clamped in the nut mating part 4401 and the stud mating part 4402.

[0081] Nuts with incorrect orientation refer to nuts whose orientation does not meet the requirements mentioned above.

[0082] S38. Both the correctly positioned nut (see attached drawing 995) and the incorrectly positioned nut (see attached drawing 994) gradually move to below the scraper 423 under the continuous pressure of the upstream nut (i.e., step S36).

[0083] S39, such as Figure 6 Driven by external force, the rotating shaft 422 and scraper 423 swing back and forth. The scraper 423 knocks the nut with incorrect posture (see attached reference numeral 994) off the track body 4404. After being guided by the guide plate 421, the nut enters the lowest part of the hollow part of the feeding ring 431. The position occupied by the nut is occupied by the upstream nut with correct posture (see attached reference numeral 995). Finally, the nuts with correct posture (see attached reference numeral 995) line up and move downstream. The power of the movement comes from the continuous squeezing of the upstream nut (that is, step S36).

[0084] S40, such as Figure 4 The foremost nut enters the nut supply chamber 452. The nut feeding plate 451 rotates at a certain angle (e.g., 180°), and the nut (see attached drawing reference 999) moves to the feeding station, where it can cooperate with the suction chamber 512.

[0085] S41, End.

[0086] Other details are available in existing technologies and will not be elaborated further.

[0087] The technical means disclosed in this invention are not limited to those disclosed in the above embodiments, but also include technical solutions composed of any combination of the above technical features. It should be noted that those skilled in the art can make various improvements and modifications without departing from the principles of this invention, and these improvements and modifications are also considered within the scope of protection of this invention.

Claims

1. A nut feeder comprising a nut magazine (410), characterized in that: The nut magazine (410) is connected with the feeding chamber (420) through the conveying line (411), the feeding chamber (420) is internally provided with a nut feeding mechanism (430), the nut feeding mechanism (430) is connected with the M end of the nut track (440), the N end of the nut track (440) is connected with the nut feeding disc (451), the nut feeding disc (451) is rotationally connected in the nut feeding frame (450), at least one nut feeding chamber (452) is arranged on the edge of the nut feeding disc (451), the opening of the nut feeding chamber (452) is in communication with the N end of the nut track (440), and the contour outside of the nut feeding chamber (452) is matched with the contour outside of the nut; The nut feeding mechanism (430) comprises a feeding ring (431), the feeding ring (431) is vertically arranged and rotationally connected to one side of the feeding chamber (420) close to the nut magazine (410), a plurality of arc-shaped plates (432) are arranged on the inner wall of the feeding ring (431), the space between the inner wall of the feeding ring (431) and the arc-shaped plates (432) is a nut temporary storage chamber (4321), and the M end of the nut track (440) is inserted into the hollow portion of the feeding ring (431). A guide flow inclined plate (421) is fixed to the bottom plate of the feeding chamber (420), and the lowest part of the guide flow inclined plate (421) is higher than the lowest part of the hollow portion of the feeding ring (431).

2. The nut feeder of claim 1, wherein: A rotating shaft (422) is rotationally connected in the feeding chamber (420), the rotating shaft (422) is fixed with a scraper (423), and the scraper (423) is located downstream of the feeding ring (431) and above the nut track (440).

3. The nut feeder of claim 2, wherein: The nut track (440) comprises two track bodies (4404), the space between the two track bodies (4404) is a nut conveying cavity (4403), and the nut conveying cavity (4403) of the M end of the nut track (440) is provided with a nut transmission belt (441).

4. The nut feeder of claim 3, wherein: The track body (4404) at the position of the nut transmission belt (441) is a nut cap matching portion (4401), and the upper surface of the nut cap matching portion (4401) is not lower than the upper surface of the nut cap.

5. The nut feeder of claim 4, wherein: The track body (4404) below the scraper (423) comprises the nut cap matching portion (4401) and a threaded stud matching portion (4402).

6. The nut feeder of claim 5, wherein: At least one pair of symmetrical nut feeding chambers (452) are arranged on the edge of the nut feeding disc (451), one of the nut feeding chambers (452) is matched with the nut track (440), and the other nut feeding chamber (452) is matched with the air suction chamber (512).

7. A nut feeding method characterized by comprising: The nut feeding machine is used, and the method comprises the following steps: S30, the nuts in the nut magazine (410) are continuously or intermittently fed into the feeding chamber (420) through the conveying line (411), and the nut feeding mechanism (430) needs to be supplied with sufficient nuts; S31, the nuts in step S30 pass through the guide flow inclined plate (421) and enter the lowest part of the hollow portion of the feeding ring (431); S32, at least one nut in step S31 enters the nut temporary storage chamber (4321) at the lowest part of the feeding ring (431); S33, the feeding ring (431) rotates, the nuts are gradually raised, and the nuts are thrown down until reaching the high position. S34, the loading ring (431) rotates, the thrown nut enters the nut conveying cavity (4403) of the M end of the nut track (440); S35, after the nut hits the cushion block (443), some nuts are separated from the nut conveying cavity (4403) and fall into the nut temporary storage chamber (4321) at the lowest part of the loading ring (431), and the steps S33 and S34 are repeated; some nuts are stable in the nut conveying cavity (4403); S36, the nut stable in the nut conveying cavity (4403) is driven by the nut transmission belt (441) to move downstream; S37, after the nut is separated from the nut transmission belt (441), the nut falls on the track body (4404), at this time, the nut is divided into a nut with correct posture and a nut with incorrect posture; S38, the nut with correct posture and the nut with incorrect posture are gradually moved below the scraper 423 under the continuous extrusion of the upstream nut; S39, under the driving of external force, the rotating shaft (422) and the scraper (423) swing back and forth, the scraper (423) knocks off the nut with incorrect posture from the track body (4404), the nut enters the lowest part of the hollow part of the loading ring (431) after being guided by the guide inclined plate (421); the position occupied by the nut is occupied by the upstream nut with correct posture, and finally the nut with correct posture is arranged in a queue to move downstream, and the movement power is derived from the continuous extrusion of the upstream nut; S40, the nut at the front end enters the nut supply chamber (452), the nut loading disc (451) rotates by a certain angle, the nut moves to the loading station and can cooperate with the air suction chamber (512); S41, end.

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