Nut storage and supply device for automatic tightening

Abstract

The utility model discloses a nut storage and supply device for automatic tightening, and belongs to the technical field of automation equipment. According to the technical scheme, the device comprises a material storage unit, a feeding unit, a discharging unit and a material receiving unit, the material storage unit is located on a support b, the feeding unit is located on the material storage unit, the discharging unit is located on the side portion of the material storage unit, the material receiving unit is located below the discharging unit, the material receiving unit is connected with a vertical plate in a sliding mode, and the support b is perpendicularly connected with the vertical plate. The nut tightening device has the advantages that the nuts are stored in the nut cache and then fed into the nut sleeve of the tightening shaft at a time from the nut cache, the tightening shaft directly and automatically takes down the next nut after one nut is tightened and then tightens the next position, the nuts can be automatically and continuously tightened, the working efficiency is improved, and the labor intensity of workers is reduced. The working intensity is reduced.

Description

Technical Field

[0001] The utility model relates to a nut storage and supply device for automatic tightening, belonging to the technical field of automation equipment. Background Art

[0002] In the operation of nut tightening, generally, the nut is manually screwed onto the screw for a few turns, and then the tightening shaft is used for tightening, or the nut is manually placed into the nut sleeve at the front end of the tightening shaft and then tightened on the screw, resulting in high manual operation intensity and low production efficiency. Summary of the Utility Model

[0003] To solve the defects existing in the prior art, the purpose of the utility model is to provide a nut storage and supply device for automatic tightening. By storing the nuts in the nut cache and then feeding the nuts into the nut sleeve of the tightening shaft from the nut cache at one time, after tightening one nut, the tightening shaft directly and automatically takes the next nut and then goes to the next position for tightening, so that the nut tightening can be carried out automatically and continuously.

[0004] The technical solution of the utility model is: a nut storage and supply device for automatic tightening, including a material storage unit, a feeding unit, a blanking unit and a receiving unit. The material storage unit is located on the support b, the feeding unit is located on the material storage unit, the blanking unit is located on the side of the material storage unit, and the receiving unit is located below the blanking unit. The receiving unit is slidably connected to the vertical plate.

[0005] The material storage unit includes a nut cache groove slidably connected to the support b driven by a cylinder b.

[0006] The cylinder b is fixed at the bottom of the support b. The output end of the cylinder b is connected to the nut cache groove through the support c. The bottom of the nut cache groove is slidably connected to the linear guide b on the support b through a slider. The support b is vertically connected to the vertical plate.

[0007] The feeding unit includes a support d fixed on the support b. Both ends of the support d are connected to the guide post mounting plates. The two ends of the guide posts are connected to the guide post mounting plates. The sliding block is slidably connected to the guide posts through linear bearings. A connecting frame b is fixed at the bottom of the sliding block. A rotating pusher for unidirectionally pushing the nuts in the nut cache groove to move forward is provided on the connecting frame b. A limiting block for restricting the rotation stroke of the rotating pusher is provided on the connecting frame b. The sliding block is connected to a tension spring through a tension spring connecting rod, and the other end of the tension spring is connected to a tension spring fixing rod fixed on the support b.

[0008] The rotating pusher is rotatably connected to the connecting frame b through a pin shaft. The bottom of the rotating pusher is provided with a rotating driving surface and a pushing surface for pushing the nut to move forward.

[0009] The blanking unit includes a connecting frame a fixed at the end of the nut buffer groove. The guide rod cylinder is fixed on the mounting plate c, and the mounting plate c is fixed on the connecting frame a. The output end of the guide rod cylinder is connected to the nut supply block. Limited end faces are provided on both sides of the bottom end of the nut supply block, and hooks for temporarily receiving nuts are oppositely arranged between the limited end faces.

[0010] The material receiving unit includes a nut sleeve located directly below the oppositely arranged hooks. The nut sleeve is located at the top end of the tightening shaft. The tightening shaft is fixed on the support a, and the support a is fixed on the mounting plate a. The mounting plate a is slidably connected to the linear guide a on the vertical plate. A cylinder a is fixed on the vertical plate, and the output end of the cylinder a is connected to drive the mounting plate a through the mounting plate b.

[0011] The beneficial effects of the present utility model are as follows: By storing nuts in the nut buffer and then feeding the nuts into the nut sleeve of the tightening shaft from the nut buffer at one time, after tightening one nut, the tightening shaft directly automatically removes the next nut and then tightens at the next position, enabling the nut tightening to be automatically and continuously carried out, improving work efficiency and reducing work intensity. Description of the Drawings

[0012] Figure 1 is the three-dimensional view of the present utility model Figure 1 ;

[0013] Figure 2 is the three-dimensional view of the present utility model Figure 2 ;

[0014] Figure 3 is the side view of the present utility model;

[0015] Figure 4 is the partial cross-sectional view of the feeding unit;

[0016] Figure 5 is the partial view of the nut supply block;

[0017] Figure 6 is the state diagram of the nut partially entering the nut sleeve;

[0018] Figure 7 is the state diagram of the separation of the nut supply block from the nut and the completion of the material receiving by the nut sleeve.

[0019] The reference numerals in the figure are as follows: 1, vertical plate; 2, linear guide rail a; 3, mounting plate a; 4, bracket a; 5, tightening shaft; 6, mounting plate b; 7, cylinder a; 8, bracket b; 9, linear guide rail b; 10, nut buffer groove; 11, bracket c; 12, cylinder b; 13, connecting frame a; 14, mounting plate c; 15, guide rod cylinder; 16, nut block supply; 16.1, limiting end face; 16.2, hook; 17, bracket d; 18, guide post mounting plate; 19, guide post; 20, sliding block; 21, linear bearing; 22, tension spring connecting rod; 23, tension spring; 24, tension spring fixing rod; 25, connecting frame b; 26, rotating push block; 26.1, rotation driving surface; 26.2, pushing surface; 27, pin shaft; 28, nut sleeve; 29, nut. Detailed implementation mode

[0020] The following will further describe the present utility model in conjunction with the attached Figures 1-7 drawings:

[0021] A nut storage and supply device for automatic tightening includes a storage unit, a feeding unit, a blanking unit, and a receiving unit. The storage unit is located on the bracket b8, and the nut 29 is temporarily stored in the storage unit. The feeding unit is located on the storage unit and is used to push the nut 29 in the storage unit into the blanking unit. The blanking unit is located on the side of the storage unit, and the receiving unit is located below the blanking unit. The blanking unit conveys the nut 29 into the receiving unit. The receiving unit is slidably connected to the vertical plate 1, and the bracket b8 is vertically connected to the vertical plate 1. After receiving the nut 29, the receiving unit tightens the nut 29 to a specified position.

[0022] The storage unit includes a nut buffer groove 10 driven by the cylinder b12 and slidably connected to the bracket b8. A number of nuts 29 are arranged in a single row in the nut buffer groove 10. The nut 29 is a hexagonal nut. The end faces of the front and rear two sides of the hexagon of the head of adjacent hexagonal nuts are respectively in contact with the end faces of the hexagons of the adjacent nuts in the front and rear. That is, the phase of the hexagon of the head of the nut 29 remains unchanged during the movement in the nut buffer groove 10, and the phase of the nut 29 is the same as the phase of the nut sleeve 28, so that the nut 29 can smoothly enter the nut sleeve 28 during subsequent blanking. The cylinder b12 is fixed at the bottom of the bracket b8, the output end of the cylinder b12 is connected to the nut buffer groove 10 through the bracket c11, and the bottom of the nut buffer groove 10 is slidably connected to the linear guide rail b9 on the bracket b8 through a slider. The cylinder b12 drives the nut buffer groove 10 to slide on the linear guide rail b9.

[0023] The feeding unit includes a bracket d17 fixed to a bracket b8. Both ends of the bracket d17 are connected to a guide post mounting plate 18. Both ends of a guide post 19 are connected to the guide post mounting plate 18. A sliding block 20 is slidably connected to the guide post 19 through a linear bearing 21. A connecting frame b25 is fixed to the bottom of the sliding block 20. A rotating push block 26 for unidirectionally pushing a nut 29 in a nut buffer groove 10 to move forward is provided on the connecting frame b25. The "unidirectional" refers to the direction of the blanking unit. A limiting block for restricting the rotation stroke of the rotating push block 26 is provided on the connecting frame b25. The sliding block 20 is connected to a tension spring 23 through a tension spring connecting rod 22. The other end of the tension spring 23 is connected to a tension spring fixing rod 24 fixed to the bracket b8. The rotating push block 26 is rotatably connected to the connecting frame b25 through a pin shaft 27. A rotating drive surface 26.1 and a pushing surface 26.2 for pushing the nut 29 to move forward are provided at the bottom of the rotating push block 26. The pulling force generated by the tension spring 23 is transmitted to the rotating push block 26, and the rotating push block 26 acts on the inner hole wall of the nut 29. In the natural state, the rotating push block 26 rotates to the vertical state under the action of gravity (as Figure 4 shown). When the rotating push block 26 contacts and interacts with the nut 29, the nut 29 generates a reverse acting force on the rotating push block 26 (i.e., a force that makes the rotating push block 26 rotate clockwise). The rotating push block 26 is limited by the limiting block and cannot continue to rotate clockwise in the vertical state. The pushing surface 26.2 of the rotating push block 26 acts on the nut 29, applying a rightward pushing force to the nut 29. When the connecting frame b25 moves leftward, the rotating drive surface 26.1 of the rotating push block 26 contacts the nut 29, and the nut 29 pushes the rotating push block 26 to rotate counterclockwise to avoid the nut 29, so that the rotating push block 26 does not push the nut backward, achieving the purpose of unidirectionally pushing the nut 29.

[0024] The blanking unit includes a connecting frame a13 fixed to the end of the nut buffer groove 10. A guide rod cylinder 15 is fixed to a mounting plate c14, and the mounting plate c14 is fixed to the connecting frame 13. The output end of the guide rod cylinder 15 is connected to a nut supply block 16. Limiting end faces 16.1 are provided on both sides of the bottom end of the nut supply block 16. Hooks 16.2 for temporarily receiving the nut 29 are provided opposite to each other between the limiting end faces 16.1 (as Figure 5 shown). After the nut 29 is removed from the nut buffer groove 10, the outer edge of its top is directly hooked onto the hook 16.2. The receiving unit includes a nut sleeve 28 located directly below the oppositely arranged hooks 16.2. The nut sleeve 28 is located at the top end of a tightening shaft 5. The tightening shaft 5 is fixed to a bracket a4, and the bracket a4 is fixed to a mounting plate a3. The mounting plate a3 is slidably connected to a linear guide rail a2 on a vertical plate 1. A cylinder a7 is fixed to the vertical plate 1, and the output end of the cylinder a7 is connected to drive the mounting plate a3 through a mounting plate b6.

[0025] The working process of the present utility model is as follows:

[0026] When the nut sleeve 28 does not receive nuts, under the action of the guide rod cylinder 15, the side wall of the nut block 16 blocks the traveling route of the nut 29 at the end of the nut buffer groove 10, so that the nut 29 cannot be removed from the nut buffer groove 10. The traveling principle of the nut 29 in the nut buffer groove 10 has been described in the above text and will not be elaborated here. When the nut sleeve 28 receives nuts, the cylinder a7 drives the tightening shaft 5 and the nut sleeve 28 to move upward along the linear guide rail 2. The nut sleeve 28 moves to the bottom of the outlet end of the nut buffer groove 10, that is, directly below the nut supply block 16. The nut supply block 16 moves upward so that the hook 16.2 is at the same height as the outer edge of the top of the nut 29. The nut at the outermost side of the nut buffer groove 10 leaves the nut buffer groove 10 under the push of the feeding unit. The outer edge of the top of the nut 29 is hooked onto the hook 16.2. The side part of the connecting frame limits the nut 29 hooked onto the hook 16.2, so that the nut 29 stops moving and is directly opposite to the nut sleeve 28 below (as Figure 3 shown). The guide rod cylinder 25 acts, driving the nut supply block 16 and the nut 29 thereon to move downward. The limiting end face 16.2 at the bottom of the nut supply block 16 abuts against the upper end face of the nut sleeve 28, so that the nut supply block 16 stops moving (as Figure 6 shown). Since the hexagonal shape of the head of the nut 29 is in the same phase as the hexagonal inner cavity of the nut sleeve 28, at this time the nut 29 has entered the nut sleeve 28, and the nut sleeve 28 has completed receiving the nuts. The cylinder b12 acts, driving the stock storage unit, the feeding unit and the blanking unit to move leftward. Part of the nut 29 that has entered the nut sleeve 28 cannot move leftward, so that the nut 29 is separated from the hook of the nut supply block 16; the cylinder a7 acts, driving the tightening shaft 5 and the nut sleeve 22 and the nut 29 thereon to move downward. The robot drives the workpiece to be screwed with nuts to move above the nut sleeve 28. The cylinder a7 moves upward. The nut sleeve 28, driven by the tightening shaft 5, tightens the nut 29 thereon to the specified position. After tightening, the nut sleeve 28 retracts, and the robot drives the workpiece to leave. The nut sleeve 28 enters the next nut receiving working cycle.

[0027] The above are only the preferred embodiments of the present invention. It should be noted that for those of ordinary skill in the art in this technical field, without departing from the technical principle of the present invention, several improvements and modifications can be made, and these improvements and modifications should also be regarded as the protection scope of the present invention.

Claims

1. A nut storage and supply device for automatic tightening, characterized in that: It comprises a material storage unit, a material feeding unit, a material unloading unit and a material receiving unit, wherein the material storage unit is located on a bracket b (8), the material feeding unit is located on the material storage unit, the material unloading unit is located on the side of the material storage unit, the material receiving unit is located below the material unloading unit, and the material receiving unit is slidably connected to the vertical plate (1).

2. The nut storage and supply device for automatic tightening according to claim 1, characterized in that: The material storage unit comprises a nut buffer groove (10) which is slidably connected to the bracket b (8) and driven by a cylinder b (12).

3. The nut storage and supply device for automatic tightening according to claim 2, characterized in that: The cylinder b (12) is fixed at the bottom of the bracket b (8), the output end of the cylinder b (12) is connected to the nut buffer groove (10) through the bracket c (11), the bottom of the nut buffer groove (10) is slidably connected to the linear guide rail b (9) on the bracket b (8) through a slider, and the bracket b (8) is vertically connected to the vertical plate (1).

4. The nut storage and supply device for automatic tightening according to claim 2, characterized in that: The feeding unit comprises a bracket d (17) fixed on a bracket b (8), wherein both ends of the bracket d (17) are connected to a guide post mounting plate (18), and both ends of a guide post (19) are connected to the guide post mounting plate (18). A sliding block (20) is slidably connected to the guide post (19) via a linear bearing (21), and a connecting frame b (25) is fixed to the bottom of the sliding block (20). A rotating push block (26) for unidirectionally pushing a nut (29) in a nut buffer groove (10) is provided on the connecting frame b (25), and a limit block for limiting the rotational travel of the rotating push block (26) is provided on the connecting frame b (25). The sliding block (20) is connected to a tension spring (23) via a tension spring connecting rod (22), and the other end of the tension spring (23) is connected to a tension spring fixing rod (24) fixed on the bracket b (8).

5. The nut storage and supply device for automatic tightening according to claim 4, characterized in that: The rotating push block (26) is rotatably connected to the connecting frame b (25) via a pin shaft (27). The bottom of the rotating push block (26) is provided with a rotating driving surface (26.1) and a pushing surface (26.2) for pushing the nut (29) to move forward.

6. The nut storage and supply device for automatic tightening according to claim 2, characterized in that: The unloading unit comprises a connecting frame a (13) fixed to the end of the nut buffer groove (10), a guide rod cylinder (15) fixed to a mounting plate c (14), the mounting plate c (14) fixed to the connecting frame a (13), the output end of the guide rod cylinder (15) is connected to a nut block (16), limiting end surfaces (16.1) are provided on both sides of the bottom end of the nut block (16), and hooks (16.2) for temporarily receiving nuts (29) are provided between the limiting end surfaces (16.1).

7. The nut storage and supply device for automatic tightening according to claim 6, characterized in that: The material receiving unit comprises a nut sleeve (28) located directly below the hooks (16.2) arranged opposite to each other, the nut sleeve (28) being located at the top end of the tightening shaft (5), the tightening shaft (5) being fixed on a bracket a (4), the bracket a (4) being fixed on a mounting plate a (3), the mounting plate a (3) being slidably connected to a linear guide rail a (2) on a vertical plate (1), a cylinder a (7) being fixed on the vertical plate (1), and an output end of the cylinder a (7) being connected to a driving mounting plate a (3) via a mounting plate b (6).

Images