Automatic nut and screw pre-screwing device

Abstract

The utility model aims at disclosing an automatic nut and screw pre-screwing device, and belongs to the technical field of equipment fastener assembly. The automatic nut and screw pre-screwing device comprises a nut feeding assembly, a nut positioning assembly, a nut screwing assembly, a screw feeding assembly and a screw positioning assembly. The nut positioning assembly comprises an arc-shaped rail, a positioning air cylinder, a first positioning groove and a second positioning groove, wherein the first positioning groove and the second positioning groove are driven by the positioning air cylinder. The nut screwing assembly comprises a first motor and a nut bit driven by the first motor, and the nut bit is provided with an opening. The nut feeding assembly feeds nuts into the arc-shaped track. A first screw clamping finger and a second screw clamping finger are arranged at the two ends of the swing arm respectively. The device has the technical effects that the nut feeding assembly feeds the nut into the opening of the nut bit through the arc-shaped track and the cavity; the screw feeding assembly conveys a screw to a clamping hole of the first screw clamping finger or a clamping hole of the second screw clamping finger through the horizontal track. And finally, the nut is automatically locked to the screw rod by the nut bit, so that the nut is pre-screwed to the screw rod, and the whole process is automatic.

Description

Technical Field

[0001] The utility model relates to the technical field of fastener assembly of equipment, in particular to an automatic pre-tightening device for nuts and bolts. Background Art

[0002] In terms of equipment installation, sometimes it is necessary to pre-tighten nuts on bolts in advance. At present, this operation is mainly carried out manually. On the one hand, there is the defect of low pre-tightening efficiency. On the other hand, the pre-tightening lengths are inconsistent, which is not conducive to the subsequent positioning and assembly of nuts and bolts.

[0003] In view of this, it is necessary to develop an automatic pre-tightening device for nuts and bolts. Summary of the Invention

[0004] In order to solve the above technical problems, the purpose of the utility model is to disclose an automatic pre-tightening device for nuts and bolts.

[0005] To achieve the above invention purpose, the utility model provides an automatic pre-tightening device for nuts and bolts, which includes a nut feeding component, a nut positioning component, a nut tightening component, a bolt feeding component and a bolt positioning component;

[0006] The nut positioning component includes an arc track, a positioning cylinder, a first positioning groove and a second positioning groove driven by the positioning cylinder. The first positioning groove and the second positioning groove form a cavity for accommodating nuts;

[0007] The nut tightening component includes a first motor and a nut bit driven by the first motor. The nut bit is provided with an open mouth;

[0008] The nut feeding component feeds nuts into the arc track. The arc track communicates with the cavity, and the opening is aligned directly below the cavity;

[0009] The bolt positioning component includes a second motor and a swing arm driven by the second motor. The two ends of the swing arm are respectively provided with a first bolt finger and a second bolt finger;

[0010] The bolt feeding component feeds bolts into a horizontal track, and the horizontal track is aligned with the clamping hole of the first bolt finger or the clamping hole of the second bolt finger.

[0011] Preferably, the arc track includes an arc portion and a vertical portion.

[0012] Preferably, both the first positioning groove and the second positioning groove are U-shaped grooves, and both the first positioning groove and the second positioning groove are in a vertical state.

[0013] Preferably, the positioning cylinder drives the first positioning groove and the second positioning groove to approach or separate from each other.

[0014] Preferably, a first positioning piece is arranged at the lower end of the first positioning groove, and a second positioning piece is arranged at the lower end of the second positioning groove.

[0015] Preferably, the first positioning piece and the second positioning piece are used to block the nut to be locked.

[0016] Preferably, the nut tightening assembly is driven by a moving module;

[0017] The moving module includes a slide rail and a vertical bracket, and the nut tightening assembly is installed on the vertical bracket.

[0018] Preferably, the first screw finger is driven by a first finger cylinder, and the second screw finger is driven by a second finger cylinder.

[0019] Preferably, a first material bin and a second material bin are arranged below the swing arm.

[0020] Preferably, a swing cylinder and a swing plate are arranged above the first material bin and the second material bin;

[0021] The swing cylinder drives the swing plate towards the first material bin or the second material bin.

[0022] Compared with the prior art, the technical effects of the present utility model are as follows:

[0023] The purpose of the present utility model is to pre-tighten a nut to a screw. The nut feeding assembly feeds the nut through an arc track and a cavity into the open end of a nut bit; the screw feeding assembly feeds the screw through a horizontal track into the clamping hole of the first screw finger or the clamping hole of the second screw finger; finally, the nut is automatically locked to the screw by the nut bit, realizing pre-tightening the nut to the screw, with the whole process being automated, high pre-tightening efficiency and good consistency of pre-tightening length. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the specific embodiments of the present utility model or the technical solutions in the prior art, the following will briefly introduce the drawings required for use in the description of the specific embodiments or the prior art. Obviously, the following drawings are some embodiments of the present utility model. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0025] Figure 1 is a schematic three-dimensional structure diagram of the nut-screw automatic pre-tightening device of the present utility model.

[0026] Figure 2 is a schematic three-dimensional structure diagram of the nut positioning assembly of the present utility model.

[0027] Figure 3It is a three-dimensional structural schematic diagram of the automatic pre-tightening device for nuts and screws of the present utility model.

[0028] Figure 4 is the present utility model Figure 3 An enlarged structural schematic diagram at position A.

[0029] Figure 5 It is a three-dimensional structural schematic diagram of the screw positioning component of the present utility model.

[0030] Among them, 1. Nut feeding component; 2. Nut positioning component; 21. Arc track; 211. Arc part; 212. Vertical part; 22. Positioning cylinder; 221. Bracket; 23. First positioning groove; 231. First positioning piece; 24. Second positioning groove; 241. Second positioning piece; 3. Nut tightening component; 31. First motor; 32. Nut bit; 33. Open end; 4. Screw feeding component; 41. Horizontal track; 5. Screw positioning component; 51. Second motor; 52. Swing arm; 53. First screw clamp finger; 531. Clamping hole; 532. First clamp finger cylinder; 54. Second screw clamp finger; 541. Clamping hole; 542. Second clamp finger cylinder; 55. First material bin; 56. Second material bin; 57. Swing cylinder; 58. Swing plate; 6. Nut; 7. Cavity; 8. Screw; 9. Moving module; 91. Slide rail; 92. Vertical bracket; 10. CCD component. Detailed implementation mode

[0031] The present utility model will be described in detail below in conjunction with the embodiments shown in the drawings. However, it should be noted that these embodiments are not limitations on the present utility model. Any equivalent transformation or substitution in terms of function, method, or structure made by those of ordinary skill in the art based on these embodiments shall fall within the protection scope of the present utility model.

[0032] In the description of the present utility model, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on the present utility model.

[0033] Embodiment 1

[0034] Refer Figures 1 to 5 As shown, this embodiment discloses a specific implementation mode of an automatic pre-tightening device for nuts and screws.

[0035] Automatic pre-tightening device for nut and screw, refer to Figures 1 to 5 As shown in the figure, it includes a nut feeding assembly 1, a nut positioning assembly 2, a nut tightening assembly 3, a screw feeding assembly 4 and a screw positioning assembly 5; the nut positioning assembly 2 includes an arc track 21, a positioning cylinder 22, a first positioning groove 23 and a second positioning groove 24 driven by the positioning cylinder 22, and the first positioning groove 23 and the second positioning groove 24 form a cavity 7 for accommodating the nut 6; the nut tightening assembly 3 includes a first motor 31 and a nut bit 32 driven by the first motor 31, the nut bit 32 is provided with an open mouth 33, a part of the top of the nut bit 32 is cut off to form the open mouth 33, and the open mouth 33 can allow the nut 6 to pass through and fall into the bit to achieve reliable positioning. The nut tightening assembly 3 is driven by a moving module 9, and the moving module 9 includes a slide rail 91 and a vertical bracket 92, and the nut tightening assembly 3 is installed on the vertical bracket 92; the nut feeding assembly 1 feeds the nut 6 into the arc track 21, and the arc track 21 includes an arc part 211 and a vertical part 212, and the arc track 21 communicates with the cavity 7, specifically, the vertical part 212 communicates with the cavity 7, and the cavity 7 is directly below and aligned with the open mouth 33; the screw positioning assembly 5 includes a second motor 51 and a swing arm 52 driven by the second motor 51, and the two ends of the swing arm 52 are respectively provided with a first screw finger 53 and a second screw finger 54. The first screw finger 53 is driven by a first finger cylinder 532, and the first finger cylinder 532 drives the first screw finger 53 to clamp or release the screw 8. The second screw finger 54 is driven by a second finger cylinder 542, and the second finger cylinder 542 drives the second screw finger 54 to clamp or release the screw 8; the screw feeding assembly 4 feeds the screw 8 into the horizontal track 41, and the horizontal track 41 is aligned with the clamping hole 531 of the first screw finger 53 or the clamping hole 541 of the second screw finger 54.

[0036] Specifically, refer to Figures 1 to 5 As shown in the figure, the purpose of this embodiment is to pre-tighten the nut 6 onto the screw 8. The nut feeding assembly 1 feeds the nut 6 into the open mouth 33 of the nut bit 32 through the arc track 21 and the cavity 7; the screw feeding assembly 4 feeds the screw 8 into the clamping hole 531 of the first screw finger 53 or the clamping hole 541 of the second screw finger 54 through the horizontal track 41; finally, the nut bit 32 automatically locks the nut 6 onto the screw 8, realizing pre-tightening the nut onto the screw. The whole process is automated, with high pre-tightening efficiency and good consistency of pre-tightening length.

[0037] Refer to Figures 1 to 5As shown in the figure, the working principle of the nut-screw automatic pre-tightening device is as follows. The first positioning groove 23 and the second positioning groove 24 are both U-shaped grooves, and both the first positioning groove 23 and the second positioning groove 24 are in a vertical state. The positioning cylinder 22 drives the first positioning groove and the second positioning groove to approach or move away from each other. A first positioning piece 231 is provided at the lower end of the first positioning groove 23, and a second positioning piece 241 is provided at the lower end of the second positioning groove 24. The first positioning piece 231 and the second positioning piece 241 are used to block the nut 6 to be locked. The working steps of the nut-screw automatic pre-tightening device are as follows: In the first step, the nut 6 is sent into the bit through the arc track 21 and the cavity 7. The positioning cylinder 22 drives the first positioning groove 23 and the second positioning groove 24 to approach each other through the bracket 221, and makes the first positioning piece 231 and the second positioning piece 241 block the nut 6. In the second step, the screw feeding assembly 4 sends the screw 8 to the clamping hole 531 of the first screw clamping finger 53 or the clamping hole 541 of the second screw clamping finger 54 through the horizontal track 41. After the swing arm 52 rotates 180°, it is in a horizontal state, and the screw 8 is aligned with the nut 6. In the third step, the positioning cylinder 22 drives the first positioning groove and the second positioning groove to move away from each other, so that the nut 6 is completely exposed. In the fourth step, the nut bit 32 automatically locks the nut 6 to the screw 8. In the fifth step, during the rotation of the second motor 51, the first screw clamping finger 53 or the second screw clamping finger 54 is loosened, and the pre-tightened nut and screw fall into the first material bin 55 or the second material bin 56. Specifically, the nut-screw automatic pre-tightening device further includes a CCD assembly 10. The CCD assembly 10 can detect the defects of the pre-tightened nut-screw. Those without defects fall into the first material bin 55, and those with defects fall into the second material bin 56. In the sixth step, the second motor 51 rotates 180°, transports the next screw 8 into place, and completes the locking of the next nut 6. By repeating the steps from one to six, the whole process of automatic pre-tightening of the nut is realized.

[0038] See Figure 3 , in order to automatically separate the defective nut-screws, a first material bin 55 and a second material bin 56 are provided below the swing arm 52, and a swing cylinder 57 and a swing plate 58 are provided above the first material bin 55 and the second material bin 56. The swing cylinder 57 drives the swing plate 58 towards the first material bin 55 or the second material bin 56. When the CCD assembly 10 detects that the pre-tightened nut-screw has no defects, the swing cylinder 57 drives the swing plate 58 towards the first material bin 55, so that the defect-free nut-screw falls into the first material bin 55 along the swing plate 58. When the CCD assembly 10 detects that the pre-tightened nut-screw has defects, the swing cylinder 57 drives the swing plate 58 towards the second material bin 56, so that the defective nut-screw falls into the second material bin 56 along the swing plate 58, thereby realizing the separation of the defective nut-screws.

Claims

1. Automatic pre-tightening device for nut and screw, characterized in that It includes a nut feeding assembly, a nut positioning assembly, a nut tightening assembly, a screw feeding assembly and a screw positioning assembly; The nut positioning assembly includes an arc-shaped track, a positioning cylinder, a first positioning groove and a second positioning groove driven by the positioning cylinder, and the first positioning groove and the second positioning groove form a cavity for accommodating nuts; The nut tightening assembly includes a first motor and a nut bit driven by the first motor, and the nut bit is provided with an open end; The nut feeding assembly feeds nuts into the arc-shaped track, the arc-shaped track communicates with the cavity, and the lower part directly below the cavity is aligned with the open end; The screw positioning assembly includes a second motor and a swing arm driven by the second motor, and a first screw clamp finger and a second screw clamp finger are respectively arranged at both ends of the swing arm; The screw feeding assembly feeds screws into a horizontal track, and the horizontal track is aligned with the clamping hole of the first screw clamp finger or the clamping hole of the second screw clamp finger.

2. The nut-screw automatic pre-tightening device according to claim 1, characterized in that, The arc-shaped track includes an arc part and a vertical part.

3. The nut-screw automatic pre-tightening device according to claim 1, characterized in that, Both the first positioning groove and the second positioning groove are U-shaped grooves, and both the first positioning groove and the second positioning groove are in a vertical state.

4. The automatic pre-tightening device for nuts and screws according to claim 1, characterized in that, The positioning cylinder drives the first positioning groove and the second positioning groove to approach or move away from each other.

5. The automatic pre-tightening device for nuts and screws according to any one of claims 1-4, characterized in that, A first positioning piece is arranged at the lower end of the first positioning groove, and a second positioning piece is arranged at the lower end of the second positioning groove.

6. The nut-screw automatic pre-tightening device according to claim 5, characterized in that, The first positioning piece and the second positioning piece are used to block the nuts to be locked.

7. The nut-screw automatic pre-tightening device according to claim 5, characterized in that, The nut tightening assembly is driven by a moving module; The moving module includes a slide rail and a vertical bracket, and the nut tightening assembly is installed on the vertical bracket.

8. The automatic nut-screw pre-tightening device according to claim 5, characterized in that, The first screw clamp finger is driven by a first clamp finger cylinder, and the second screw clamp finger is driven by a second clamp finger cylinder.

9. The nut-screw automatic pre-tightening device according to claim 8, wherein A first material bin and a second material bin are arranged below the swing arm.

10. The automatic nut-screw pre-tightening device according to claim 9, wherein A swing cylinder and a swing plate are arranged above the first material bin and the second material bin; The swing cylinder drives the swing plate towards the first material bin or the second material bin.

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