Nut storage and supply device for automatic tightening

Abstract

The invention discloses a nut storage and supply device for automatic tightening, and belongs to the technical field of automatic 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 fixed to the vertical plate. The nut tightening device has the beneficial effects that nuts are stored in the nut cache, then the nuts are fed into the nut sleeve of the tightening shaft in one time from the nut cache, the tightening shaft directly and automatically takes the next nut after one nut is tightened, and then the next nut is tightened, so that nut tightening can be automatically and continuously carried out, and the working efficiency is improved; the working intensity is reduced.

Description

Technical Field

[0001] The invention 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 tightening the nut, the nut is usually manually screwed onto the screw for a few turns and then tightened with a tightening shaft, 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 invention

[0003] In order to solve the defects of the prior art, the purpose of the present invention is to provide a nut storage and supply device for automatic tightening. By storing the nuts in a nut buffer, and then feeding the nuts from the nut buffer into the nut sleeve of the tightening shaft at one time, the tightening shaft automatically removes the next nut directly after one nut is tightened and then tightens it at the next position, so that the tightening of the nuts can be carried out automatically and continuously.

[0004] The technical solution of the present invention is: a nut storage and supply device for automatic tightening, including a storage unit, a feeding unit, a unloading unit and a receiving unit, the storage unit is located on a bracket b, the feeding unit is located on the storage unit, the unloading unit is located on the side of the storage unit, the receiving unit is located below the unloading unit, the receiving unit is slidably connected to a vertical plate, and the bracket b is fixed on the vertical plate.

[0005] The material storage unit includes a nut buffer groove which is driven by a cylinder b and is slidably connected to a bracket b.

[0006] The cylinder b is fixed at the bottom of the bracket b, and the output end of the cylinder b is connected to the nut buffer groove through the bracket c, and the bottom of the nut buffer groove is slidably connected to the linear guide rail b on the bracket b through a slider.

[0007] The feeding unit includes a bracket d fixed on a bracket b, both ends of the bracket d are connected to a guide column mounting plate, both ends of the guide column are connected to the guide column mounting plate, a sliding block is slidably connected to the guide column through a linear bearing, a connecting frame b is fixed to the bottom of the sliding block, a rotating push block for unidirectionally pushing a nut in a nut cache groove is provided on the connecting frame b, a limit block for limiting the rotational travel of the rotating push block 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 bracket b.

[0008] The rotating push block is rotatably connected to the connecting frame b through a pin shaft, and a rotating driving surface and a pushing surface for pushing the nut to move are provided at the bottom of the rotating push block.

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

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

[0011] The beneficial effect of the present invention is that by storing the nuts in a nut buffer and then feeding the nuts from the nut buffer into the nut sleeve of the tightening shaft at one time, the tightening shaft automatically takes out the next nut directly after tightening one nut and then tightens it at the next position, so that the tightening of the nuts can be automatically and continuously performed, thereby improving work efficiency and reducing work intensity. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 The three-dimensional Figure 1 ;

[0013] Figure 2 The three-dimensional Figure 2 ;

[0014] Figure 3 is a side view of the present invention;

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

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

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

[0018] Figure 7 This is a state diagram of the nut block being separated from the nut and the nut sleeve being connected.

[0019] The accompanying drawings are marked as follows: 1. vertical plate, 2. linear guide a, 3. mounting plate a, 4. bracket a, 5. tightening shaft, 6. mounting plate b, 7. cylinder a, 8. bracket b, 9. linear guide b, 10. nut buffer slot, 11. bracket c, 12. cylinder b, 13. connecting frame a, 14. mounting plate c, 15. guide rod cylinder, 16. nut supply block, 16.1. limit end face, 16.2. hook, 17. bracket d, 18. guide column mounting plate, 19. guide column, 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. rotating drive surface, 26.2. pushing surface, 27. pin shaft, 28. nut sleeve, 29. nut. DETAILED DESCRIPTION

[0020] The following is combined with Figure 1-7 The present invention is further described:

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

[0022] The material storage unit includes a nut cache slot 10 that is slidably connected to the bracket b8 and driven by the cylinder b12. A plurality of nuts 29 are arranged in a single row in the nut cache slot 10. The nuts 29 are hexagonal nuts. The end faces of the front and rear sides of the hexagonal shapes of the adjacent hexagonal nut heads are in contact with the end faces of the hexagonal shapes of the front and rear adjacent nuts, respectively, that is, the phase of the hexagonal shape of the head of the nut 29 in the nut cache slot 10 remains unchanged during the movement, and the phase of the nut 29 is the same as that of the nut sleeve 28, so that the nut 29 can smoothly enter the nut sleeve 28 during subsequent unloading. The cylinder b12 is fixed to the bottom of the bracket b8, and the output end of the cylinder b12 is connected to the nut cache slot 10 through the bracket c11. The bottom of the nut cache slot 10 is slidably connected to the linear guide b9 on the bracket b8 through a slider. The cylinder b12 drives the nut cache slot 10 to slide on the linear guide b9.

[0023] The feeding unit includes a bracket d17 fixed on the bracket b8, the two ends of the bracket d17 are connected to the guide column mounting plate 18, the two ends of the guide column 19 are connected to the guide column mounting plate 18, the sliding block 20 is slidably connected to the guide column 19 through a linear bearing 21, the bottom of the sliding block 20 is fixed with a connecting frame b25, the connecting frame b25 is provided with a rotating push block 26 for unidirectionally pushing the nut 29 in the nut buffer slot 10, the unidirectional refers to the direction of the unloading unit, the connecting frame b25 is provided with a limit block for limiting the rotation stroke of the rotating push block 26, the sliding block 20 is connected to the tension spring 23 through the tension spring connecting rod 22, and the other end of the tension spring 23 is connected to the tension spring fixing rod 24 fixed on the bracket b8. The rotating push block 26 is rotatably connected to the connecting frame b25 through a pin 27, and 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. The tension 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 is rotated to a vertical state (such as Figure 4 As shown in the figure, when the rotating push block 26 contacts and interacts with the nut 29, the nut 29 generates a reverse force on the rotating push block 26 (i.e., a force that causes the rotating push block 26 to 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, exerting a rightward pushing force on the nut 29. When the connecting frame b25 moves to the left, the rotating driving 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 back, achieving the purpose of pushing the nut 29 in one direction.

[0024] The unloading unit includes a connecting frame a13 fixed to the end of the nut buffer slot 10, a guide rod cylinder 15 fixed to a mounting plate c14, and the mounting plate c14 fixed to the connecting frame 13. The output end of the guide rod cylinder 15 is connected to a nut block 16. The bottom ends of the nut block 16 are provided with limiting end faces 16.1 on both sides, and hooks 16.2 (such as 16.3) for temporarily receiving the nut 29 are arranged between the limiting end faces 16.1. Figure 5 As shown in the figure, after the nut 29 is removed from the nut buffer slot 10, its top outer edge is directly hooked on the hook 16.2. The material receiving unit includes a nut sleeve 28 located just below the relatively arranged hook 16.2, and the nut sleeve 28 is located at the top of the tightening shaft 5. The tightening shaft 5 is fixed on the bracket a4, and the bracket a4 is fixed on the mounting plate a3. The mounting plate a3 is slidably connected to the linear guide a2 on the vertical plate 1. The vertical plate 1 is fixed with a cylinder a7, and the output end of the cylinder a7 is connected to the driving mounting plate a3 through the mounting plate b6.

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

[0026] When the nut sleeve 28 is not connected to the material, the nut block 16 is provided under the action of the guide rod cylinder 15, and the side wall blocks the travel path of the nut 29 at the end of the nut cache slot 10, so that the nut 29 cannot be moved out of the nut cache slot 10. The travel principle of the nut 29 in the nut cache slot 10 has been recorded above and will not be repeated here. When the nut sleeve 28 receives the nut, the cylinder a7 drives the tightening shaft 5 and the nut sleeve 28 to move upward along the linear guide rail 2, and the nut sleeve 28 moves to the bottom of the outlet end of the nut cache slot 10, that is, directly below the nut block 16. The nut block 16 moves upward so that the hook 16.2 is at the same height as the top outer edge of the nut 29. The outermost nut in the nut cache slot 10 leaves the nut cache slot 10 under the push of the feeding unit, and the top outer edge of the nut 29 is hung on the hook 16.2. The side of the connecting frame limits the nut 29 hung on the hook 16.2, so that the nut 29 stops moving and faces the nut sleeve 28 below (such as Figure 3 As shown), the guide cylinder 25 is actuated to drive the nut block 16 and the nut 29 thereon to move downward, and the limiting end surface 16.2 at the bottom of the nut block 16 is pressed against the upper end surface of the nut sleeve 28, so that the nut block 16 stops moving (as shown in FIG. Figure 6 As shown), since the hexagonal shape of the head of the nut 29 is in phase with the hexagonal inner cavity of the nut sleeve 28, the nut 29 has entered the nut sleeve 28 at this time, and the nut sleeve 28 completes the material connection, and the cylinder b12 is actuated to drive the material storage unit, the feeding unit and the unloading unit to move left, and some nuts 29 that have entered the nut sleeve 28 cannot move left, thereby separating the nut 29 from the hook of the nut supply block 16; the cylinder a7 is actuated to drive the tightening shaft 5 and the nut sleeve 22 and nut 29 thereon to move downward, and the robot drives the nut workpiece to be tightened to move above the nut sleeve 28, and the cylinder a7 moves upward. Under the drive of the tightening shaft 5, the nut sleeve 28 tightens the nut 29 thereon to the specified position. After tightening, the nut sleeve 28 is withdrawn, and the robot drives the workpiece to leave, and the nut sleeve 28 enters the next material connection working cycle.

[0027] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the technical principles of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A nut storage and supply device for automatic tightening, characterized in that: The invention 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, and the material receiving unit is located below the material unloading unit. The material receiving unit is slidably connected to a vertical plate (1), and the bracket b (8) is fixed on 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), and the output end of the cylinder b (12) is connected to the nut buffer groove (10) through the bracket c (11), and 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.

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).

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