Nail locking mechanism

Abstract

The utility model discloses a nail locking mechanism which comprises a machine frame, a rotating disc is installed on the machine frame, and guide rods are arranged on the rotating disc in a sliding mode along a circumferential array. A support is erected on the machine frame, a sliding block is installed on the support in a sliding mode, a first motor is installed on the sliding block, and a connecting rod is connected to the first motor. A nail detection optical fiber sensor is mounted on the rack through a connecting frame; a visual identification device is mounted on the rack; a sleeve is arranged on the guide rod in a sliding mode, a limiting mechanism is arranged between the sleeve and the guide rod, a screwdriver head is elastically arranged in the sleeve, and a magnet is further arranged in the sleeve. According to the screwdriver, the screwdriver head is more convenient to disassemble.

Description

Technical Field

[0001] The utility model relates to the technical field of locking nail equipment, in particular to a locking nail mechanism. Background Art

[0002] In modern industrial production, especially in the assembly processes of fields such as electronic products and mechanical equipment, the locking operation is a key and frequently performed process. Traditional locking methods usually have many problems, greatly affecting production efficiency and product quality.

[0003] Currently, other companies have applied for patents on similar locking mechanisms, with the patent number: 201610264880.2. This patent is the "Magnetic Levitation Retractable Bit Assembly for Screw Tightening" applied by Jinan Xinjierui Electric Co., Ltd. in 2016.

[0004] Problems existing in the above patent:

[0005] The whole assembly is installed on the locking nail mechanism. The guide rod slides up and down and rotates through the turntable bushing to achieve locking. The return spring is in direct contact with the locking nail mechanism. When locking, the whole bit rod assembly rotates, and the spring will rub against the locking nail mechanism or the limit bushing at the upper end of the guide rod, affecting the accuracy of the locking torque.

[0006] When replacing the bit, it is necessary to push the nylon sleeve upward to expose the pin shaft, take out the pin shaft, and then remove the sleeve to take out the bit. The cooperation between the nylon sleeve and the sleeve is not easy to control. If it is too tight, it is not easy to disassemble and install; if it is too loose, it is easy to vibrate and fall off during locking. The pin shaft is relatively small and is easy to lose during the replacement process. Summary of the Utility Model

[0007] Aiming at the defects in the prior art, the utility model provides a locking nail mechanism.

[0008] The utility model is realized through the following technical solutions:

[0009] A locking nail mechanism, comprising a frame, on which a turntable is mounted, and guide rods are slidably arranged in a circumferential array on the turntable; a bracket is erected on the frame, a slider is slidably mounted on the bracket, a first motor is mounted on the slider, and a connecting rod is connected to the first motor; a nail inspection fiber optic sensor is mounted on the frame through a connecting frame; a vision recognition device is mounted on the frame; a first shaft sleeve is arranged at the top of the guide rod, a cross groove is arranged on the first shaft sleeve, a first thrust bearing is arranged on the guide rod at the position of the first shaft sleeve, a second thrust bearing is slidably mounted on the guide rod, a first spring is arranged on the guide rod between the first thrust bearing and the second thrust bearing, and the second thrust bearing is mounted on the turntable; a second shaft sleeve is arranged on the guide rod, a through hole is arranged on the second shaft sleeve, a second pin shaft is mounted in the through hole, a notch is arranged on the guide rod and is matched with the second pin shaft, a second arc groove is arranged at the through hole on the outer wall of the second shaft sleeve, and a second O-ring is mounted in the second arc groove; a sleeve is slidably mounted at the bottom of the guide rod, a second spring is arranged between the top of the sleeve and the bottom of the second shaft sleeve, the top of the second spring is connected to the bottom of the second shaft sleeve, a bit is elastically arranged in the sleeve, the bit extends into the guide rod and is connected to a push rod, ears are arranged on both sides of the bit, and rectangular grooves are arranged in the guide rod and are matched with the ears; circular holes are arranged in a circumferential array on the side wall of the guide rod at the position of the push rod, steel balls are mounted in the circular holes, card slots are arranged in a circumferential array on the push rod and are matched with the steel balls, and a travel groove is arranged on the inner wall of the sleeve and is matched with the steel balls; a magnet is arranged at the bottom of the sleeve.

[0010] Preferably, a second motor is arranged on the frame, a small gear is connected to the second motor, a large gear is connected to the turntable, the large gear meshes with the small gear, and an opening matched with the guide rod is arranged on the large gear.

[0011] Preferably, a slide rail is arranged on the bracket, and the slider is mounted on the slide rail.

[0012] Preferably, a mounting plate is arranged on the frame, a camera is mounted on the mounting plate, a lens is connected to the camera, and a light source is connected to the lens.

[0013] Preferably, a guide post is arranged on the slider, a connecting block is slidably mounted on the guide post, a third spring is arranged between the connecting block and the bottom end of the guide post, a cylinder is mounted on the frame, and a piston rod of the cylinder is connected to the connecting block.

[0014] Preferably, a first arc groove is formed in the side wall of the first shaft sleeve, a through hole is arranged at the first arc groove, a first pin shaft is mounted in the through hole, a mounting hole matched with the first pin shaft is arranged on the guide rod, and a first O-ring is mounted in the first arc groove.

[0015] Preferably, a shaft retaining ring is provided on the guide rod at the top of the second bushing, and a gasket, a third O-ring and a gasket are sequentially provided on the guide rod at the top of the shaft retaining ring.

[0016] Preferably, a step is provided on the bit head, a spring groove is provided in the sleeve, and a fourth spring is provided between the step and the spring groove.

[0017] The beneficial effects of the present utility model are embodied in:

[0018] 1. It is not necessary to disassemble the bit rod assembly to disassemble the sleeve for replacing the bit head, which makes the bit head replacement convenient and fast, and it is not easy to lose accessories;

[0019] 2. By supporting the spring with two thrust bearings, the frictional resistance during the rotation of the guide rod can be reduced, making the locking torque more accurate;

[0020] 3. The present utility model can realize the positioning of the locking nail hole and the detection of the screw after locking the nail through the visual recognition device. Description of the Drawings

[0021] 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 the description of the specific embodiments or the prior art. In all the drawings, similar elements or parts are generally identified by similar reference numerals. In the drawings, the elements or parts are not necessarily drawn to scale.

[0022] Figure 1 This is the axonometric view of the present utility model.

[0023] Figure 2 This is the front view of the guide rod assembly of the present utility model.

[0024] Figure 3 For Figure 2 the A-direction sectional view.

[0025] Figure 4 For Figure 3 the B-direction sectional view.

[0026] Figure 5 This is the partial view of the guide rod assembly of the present utility model.

[0027] In the attached drawings, 1 is the first motor; 2 is the connecting rod; 3 is the slider; 4 is the cylinder; 5 is the slide rail; 6 is the bracket; 7 is the guide post; 8 is the bearing seat; 9 is the connecting block; 10 is the third spring; 11 is the second motor; 12 is the pinion; 13 is the large gear; 14 is the turntable; 15 is the camera; 16 is the lens; 17 is the light source; 18 is the nail inspection fiber optic sensor; 19 is the guide rod; 20 is the first bushing; 21 is the first pin shaft; 22 is the first O-ring; 23 is the first thrust bearing; 24 is the first spring; 25 is the second thrust bearing; 26 is the shaft retaining ring; 27 is the third O-ring; 28 is the gasket; 29 is the second bushing; 30 is the second pin shaft; 31 is the second O-ring; 32 is the notch; 33 is the second spring; 34 is the push rod; 35 is the card slot; 36 is the steel ball; 37 is the travel slot; 38 is the sleeve; 39 is the bit; 40 is the ear; 41 is the rectangular slot; 42 is the fourth spring; 43 is the magnet; 44 is the frame. Detailed implementation manners

[0028] In order to make the above objects, features and advantages of the present utility model more obvious and understandable, the following will describe in detail the specific implementation manners of the present utility model with reference to the attached drawings. Many specific details are set forth in the following description in order to fully understand the present utility model. However, the present utility model can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without departing from the connotation of the present utility model. Therefore, the present utility model is not limited by the specific embodiments disclosed below.

[0029] It should be noted that when an element is referred to as being "fixed to" another element, it can be directly on the other element or there can also be an intermediate element. When an element is considered to be "connected" to another element, it can be directly connected to the other element or there may be an intermediate element at the same time.

[0030] For ease of description, spatial relative terms such as "upper", "lower", "left", "right", etc. can be used here to describe the relationship of one element or feature shown in the drawings relative to another element or feature. It should be understood that in addition to the orientations shown in the drawings, the spatial terms are intended to include different orientations during the use or operation of the device. For example, if the device in the drawings is inverted, the element described as being "below" other elements or features will be positioned "above" other elements or features. Therefore, the exemplary term "lower" can include both upper and lower orientations.

[0031] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the technical field to which this utility model belongs. The terms used in the description of this utility model herein are for the purpose of describing specific embodiments only and are not intended to limit this utility model. The term "and / or" used herein includes any and all combinations of one or more of the related listed items.

[0032] The following describes this utility model in detail with reference to the accompanying drawings: A locking nail mechanism of this utility model includes a frame 44, on which a turntable 14 is installed. Guide rods 19 are slidably arranged in a circumferential array on the turntable 14; A bracket 6 is erected on the frame 44, and a slider 3 is slidably installed on the bracket 6. A first motor 1 is installed on the slider 3, and the output shaft of the first motor 1 is connected to a connecting rod 2 through a coupling. The connecting rod 2 is supported by a bearing and a bearing seat 8; A nail inspection fiber optic sensor 18 is installed on the frame 44 through a connecting frame; A vision recognition device is installed on the frame 44; At the top of the guide rod 19, a first bushing 20 is provided, and a cross groove is provided on the first bushing 20. A first thrust bearing 23 is provided at the position of the first bushing 20 on the guide rod 19. A second thrust bearing 25 is slidably installed on the guide rod 19. A first spring 24 is provided on the guide rod 19 between the first thrust bearing 23 and the second thrust bearing 25. The second thrust bearing 25 is installed on the turntable 14, and both ends of the spring are supported by thrust bearings, so that the spring does not rotate when the guide rod 19 rotates, reducing the frictional resistance when the guide rod 19 rotates; A second bushing 29 is provided on the guide rod 19, and a through hole is provided on the second bushing 29. A second pin shaft 30 is installed in the through hole. A notch 32 matching the second pin shaft 30 is provided on the guide rod 19. A second arc groove is provided at the through hole on the outer wall of the second bushing 29, and a second O-ring 31 is installed in the second arc groove to fix and block the second pin shaft 30 to prevent it from falling off; A sleeve 38 is slidably installed at the bottom of the guide rod 19. A second spring 33 is provided between the top of the sleeve 38 and the bottom of the second bushing 29. The top of the second spring 33 is connected to the bottom of the second bushing 29. A bit 39 is elastically arranged in the sleeve 38. A push rod 34 is slidably installed at the position of the second pin shaft 30 in the guide rod 19. The bit 39 extends into the guide rod 19 and is connected to the push rod 34. Ears 40 are provided on both sides of the bit 39, and a rectangular groove 41 matching the ears 40 is provided in the guide rod 19, so that the bit 39 rotates when the guide rod 19 rotates; Circular holes are arranged in a circumferential array on the side wall of the guide rod 19 at the position of the push rod 34, and steel balls 36 are installed in the circular holes. Card slots 35 matching the steel balls 36 are arranged in a circumferential array on the push rod 34. A travel groove 37 matching the steel balls 36 is provided on the inner wall of the sleeve 38; A magnet 43 is provided at the bottom of the sleeve 38, and the magnet 43 can adsorb the screw.

[0033] By pushing the second bushing 29, the second pin shaft 30 can move up and down within the notch 32. The resiliently arranged bit 39 can push up the push rod 34 to the position of the second pin shaft 30, enabling the steel ball 36 to be located on the outer cylindrical surface of the push rod 34, so that the steel ball 36 is stuck in the travel groove 37 on the inner wall of the sleeve 38, preventing the sleeve 38 from falling off. The second spring 33 between the sleeve 38 and the second bushing 29 can push up the second bushing 29 to keep the steel ball 36 on the outer cylindrical surface of the push rod 34.

[0034] When the bit 39 needs to be replaced, push down the second bushing 29. The second bushing 29 drives the push rod 34 downward through the second pin shaft 30, causing the steel ball 36 to fall into the card slot 35 on the outer wall of the push rod 34. At this time, the steel ball 36 no longer holds the sleeve 38, and the sleeve 38 disengages downward. After the sleeve 38 disengages, the second spring 33 expands downward, blocking the steel ball 36 within the round hole to prevent the steel ball 36 from disengaging.

[0035] Preferably, a second motor 11 is provided on the frame 44. A small gear 12 is connected to the second motor 11. A large gear 13 is connected to the turntable 14. The large gear 13 meshes with the small gear 12. An opening for cooperating with the guide rod 19 is provided on the large gear 13.

[0036] Preferably, a slide rail 5 is provided on the bracket 6. The slider 3 is installed on the slide rail 5.

[0037] Preferably, a mounting plate is provided on the frame 44. A camera 15 is mounted on the mounting plate. A lens 16 is connected to the camera 15. A light source 17 is connected to the lens 16. During actual operation, the nail-locking mechanism is installed on the manipulator. A coordinate system is established with the manipulator as the reference. The camera 15 on the nail-locking mechanism is also within this coordinate system. After the product enters the nail-locking range of the manipulator along the assembly line, it stops. The manipulator drives the camera 15 on the nail-locking mechanism to take pictures of the feature points of the product (such as the four corners of the product). The feature points on the product and the holes to be nail-locked are in relatively fixed positions (the product is a standard product produced by a stamping die with relatively strict dimensional tolerances). After taking the pictures, calculate the position of the product in the aforementioned coordinate system, and then calculate the position coordinates of the nail-locking holes, thereby guiding the manipulator to drive the nail-locking mechanism to perform nail-locking.

[0038] Preferably, a guide post 7 is provided on the slider 3. A connecting block 9 is slidably mounted on the guide post 7. A third spring 10 is provided between the connecting block 9 and the bottom end of the guide post 7. A cylinder 4 is installed on the frame 44. The piston rod of the cylinder 4 is connected to the connecting block 9. The third spring 10 plays a buffering role to reduce the impact of the downward pressure on the product.

[0039] Preferably, a first arc groove is formed in the side wall of the first bushing 20. A through hole is provided at the first arc groove, and a first pin shaft 21 is installed in the through hole. An installation hole matching with the first pin shaft 21 is arranged on the guide rod 19. A first O-ring 22 is installed in the first arc groove to fixedly block the first pin shaft 21 and prevent it from falling off. During the locking operation, the connecting rod 2 rotates to drive the first bushing 20 to rotate, and the first bushing 20 drives the guide rod 19 to rotate through the first pin shaft 21.

[0040] Preferably, a shaft retaining ring 26 is arranged on the guide rod 19 at the top of the second bushing 29. Gaskets 28, a third O-ring 27 and gaskets 28 are sequentially arranged on the guide rod 19 at the top of the shaft retaining ring 26, which play a role in noise reduction and shock absorption when the guide rod 19 returns to its original position.

[0041] Preferably, a step is arranged on the bit 39. A spring groove is arranged in the sleeve 38. A fourth spring 42 is arranged between the step and the spring groove. The fourth spring 42 can jack up the bit 39 in the sleeve 38, and then the bit 39 jacks up the push rod 34.

[0042] When the equipment is running, after the bit rod assembly with the guide rod 19 as the core sucks up the screw, the second motor 11 drives the turntable 14 to perform an equal division movement, so that the connecting rod 2 is always aligned with a group of bit rod assemblies below. Through the downward pulling action of the cylinder 4, the connecting rod 2 is inserted into the cross slot of the bit rod assembly, driving the bit rod assembly to rotate and descend. The bit rod assembly extends downward to lock the screw into the lock hole. The nail detection fiber optic sensor 18 can detect whether a group of bit rod assemblies has sucked up the screw during one rotation of the turntable 14. If not, it will remove the nail and re-pick up the nail or give an alarm according to the program.

[0043] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements on some or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present invention, and they should all be covered by the scope of the claims and the description of the present invention.

Claims

1. A locking nail mechanism, comprising a frame (44), characterized in that: A turntable (14) is installed on the frame (44), and guide rods (19) are slidably arranged in a circumferential array on the turntable (14); a bracket (6) is erected on the frame (44), a slider (3) is slidably installed on the bracket (6), a first motor (1) is installed on the slider (3), and a connecting rod (2) is connected to the first motor (1); a nail inspection fiber optic sensor (18) is installed on the frame (44) through a connecting frame; a vision recognition device is installed on the frame (44); a first bushing (20) is arranged at the top of the guide rod (19), a cross groove is arranged on the first bushing (20), a first thrust bearing (23) is arranged at the position of the first bushing (20) on the guide rod (19), a second thrust bearing (25) is slidably installed on the guide rod (19), a first spring (24) is arranged on the guide rod (19) between the first thrust bearing (23) and the second thrust bearing (25), and the second thrust bearing (25) is installed on the turntable (14); a second bushing (29) is arranged on the guide rod (19), a through hole is arranged on the second bushing (29), a second pin shaft (30) is installed in the through hole, a notch (32) matched with the second pin shaft (30) is arranged on the guide rod (19), a second arc groove is arranged at the through hole of the outer wall of the second bushing (29), and a second O-ring (31) is installed in the second arc groove; a sleeve (38) is slidably installed at the bottom of the guide rod (19), a second spring (33) is arranged between the top of the sleeve (38) and the bottom of the second bushing (29), the top of the second spring (33) is connected to the bottom of the second bushing (29), a bit (39) is elastically arranged in the sleeve (38), a push rod (34) is slidably installed at the position of the second pin shaft (30) in the guide rod (19), the bit (39) extends into the guide rod (19) and is connected to the push rod (34), ears (40) are arranged on both sides of the bit (39), and a rectangular groove (41) matched with the ears (40) is arranged in the guide rod (19); circular holes are arranged in a circumferential array on the side wall of the guide rod (19) at the position of the push rod (34), steel balls (36) are installed in the circular holes, card slots (35) matched with the steel balls (36) are arranged in a circumferential array on the push rod (34), and a travel groove (37) matched with the steel balls (36) is arranged on the inner wall of the sleeve (38); a magnet (43) is arranged at the bottom of the sleeve (38).

2. The locking nail mechanism according to claim 1, wherein: A second motor (11) is arranged on the frame (44), a small gear (12) is connected to the second motor (11), a large gear (13) is connected to the turntable (14), the large gear (13) meshes with the small gear (12), and an opening matched with the guide rod (19) is arranged on the large gear (13).

3. The locking nail mechanism according to claim 1, characterized in that: A slide rail (5) is arranged on the bracket (6), and the slider (3) is installed on the slide rail (5).

4. The locking nail mechanism according to claim 1, characterized in that: An installation plate is arranged on the frame (44), a camera (15) is installed on the installation plate, a lens (16) is connected to the camera (15), and a light source (17) is connected to the lens (16).

5. The locking nail mechanism according to claim 1, characterized in that: A guide post (7) is provided on the slider (3), a connecting block (9) is slidably mounted on the guide post (7), a third spring (10) is provided between the connecting block (9) and the bottom end of the guide post (7), a cylinder (4) is mounted on the frame (44), and the piston rod of the cylinder (4) is connected to the connecting block (9).

6. The locking nail mechanism according to claim 1, wherein: A first arc groove is formed in the side wall of the first bushing (20), a through hole is provided at the first arc groove, a first pin shaft (21) is installed in the through hole, a mounting hole matching with the first pin shaft (21) is provided on the guide rod (19), and a first O-ring (22) is installed in the first arc groove.

7. The locking nail mechanism according to claim 1, wherein: A shaft retaining ring (26) is provided on the guide rod (19) at the top end of the second bushing (29), and a gasket (28), a third O-ring (27) and a gasket (28) are sequentially provided on the guide rod (19) at the top end of the shaft retaining ring (26).

8. The locking nail mechanism according to claim 1, wherein: A step is provided on the bit (39), a spring groove is provided in the sleeve (38), and a fourth spring (42) is provided between the step and the spring groove.

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