Locking force adjusting device of automatic screw locking machine

Abstract

The utility model discloses an automatic screw locking machine locking force adjusting device which comprises a mounting plate, the top of the mounting plate is fixedly connected with a motor, the output end of the motor is fixedly connected with a driving shaft, the bottom of the driving shaft is fixedly connected with a fixing frame, the bottom of the fixing frame is fixedly connected with a connecting cylinder, and the connecting cylinder is fixedly connected with a screw locking device. A frame body is inserted into the bottom of the connecting cylinder, a sleeve is fixedly connected to the bottom of the frame body, a screw rod is in threaded connection with the center axis of the top of the connecting cylinder, and a pressure sensor is movably connected to the bottom of the screw rod. When adjustment is needed, a pressure value is set through an external PLC, then the lead screw is rotated, the lead screw drives the pressure sensor to move, the pressure sensor drives the connecting plate to move, the connecting plate drives the hollow rod to move, the hollow rod drives the first spring to deform, and therefore the pressure value is adjusted. After the pressure sensor detects that the pressure value is the same as the set value, the adjustment work can be completed.

Description

Technical Field

[0001] This utility model relates to the field of screw fastening machine technology, specifically to an automatic screw fastening machine tightening force adjustment device. Background Technology

[0002] Automatic screw fastening machines use various electric and pneumatic components to automatically feed, tighten, and inspect screws. This simplifies the screw fastening process, reducing the number of workers and minimizing human error.

[0003] Existing automatic screw fastening machines cannot adjust the tightening force during use, thus failing to accurately control the tightening force of bolts. Excessive force can easily damage the motor, while insufficient force can easily cause loosening, failing to meet usage requirements. Therefore, we propose an automatic screw fastening machine tightening force adjustment device. Utility Model Content

[0004] To address the shortcomings of existing technologies, the purpose of this utility model is to provide an automatic screw fastening machine tightening force adjustment device, which has the advantage of precise adjustment. This solves the problem that existing automatic screw fastening machines cannot adjust the tightening force during use, thus failing to accurately control the tightening force of bolts. Excessive force can easily damage the motor, while insufficient force can easily cause loosening, thus failing to meet the usage requirements.

[0005] To achieve the above objectives, this utility model provides the following technical solution: an automatic screw fastening machine tightening force adjustment device, comprising a mounting plate, a motor fixedly connected to the top of the mounting plate, a drive shaft fixedly connected to the output end of the motor, a fixed frame fixedly connected to the bottom of the drive shaft, a connecting cylinder fixedly connected to the bottom of the fixed frame, a frame inserted into the bottom of the connecting cylinder, a sleeve fixedly connected to the bottom of the frame, a lead screw threadedly connected to the central shaft at the top of the connecting cylinder, a pressure sensor movably connected to the bottom of the lead screw, a connecting plate fixedly connected to the bottom of the pressure sensor, hollow rods movably connected to both sides of the connecting plate, a first spring fixedly connected to one side of the inner cavity of the hollow rod, a movable rod fixedly connected to one side of the first spring, a vertical plate movably connected to one side of the movable rod, a positioning block fixedly connected to one side of the vertical plate, and a positioning block engaging with the connecting cylinder on one side.

[0006] Preferably, a connecting frame is fixedly connected to the top of the outer surface of the frame, prisms are fixedly connected to both sides of the connecting cylinder, a fixing plate is fixedly connected to one side of the prism, a second spring is fixedly connected to one side of the fixing plate, an arc plate is fixedly connected to one side of the second spring, a locking block is fixedly connected to one side of the arc plate, and one side of the locking block is inserted into the connecting frame.

[0007] Preferably, the top of the connecting plate is movably connected to the lead screw via a bearing, and a movable groove is provided on one side of the hollow rod.

[0008] Preferably, the inner cavity of the vertical plate is slidably connected to a horizontal bar, and both sides of the horizontal bar are fixedly connected to the connecting cylinder.

[0009] Preferably, the front and back of the movable rod are fixedly connected to a sliding sleeve, and the inner cavity of the sliding sleeve is slidably connected to a sliding rod, and both sides of the sliding rod are fixedly connected to the hollow rod.

[0010] Preferably, a rectangular groove is provided on one side of the arc-shaped plate, and the inner cavity of the rectangular groove is slidably connected to the prism.

[0011] Compared with the prior art, this utility model provides an automatic screw fastening machine tightening force adjustment device, which has the following beneficial effects:

[0012] 1. When adjustment is required, the pressure value is set through the external PLC controller. Then, the lead screw is rotated, which drives the pressure sensor to move. The pressure sensor drives the connecting plate to move, and the connecting plate drives the hollow rod to move. The hollow rod causes the first spring to deform, thereby adjusting the pressure value. After the pressure sensor detects that the pressure value is the same as the set value, the adjustment is completed. After the screw is tightened during the operation, the motor will cause the connecting cylinder to continue to rotate, thereby moving the positioning block away from the frame and avoiding excessive torque that could damage the motor.

[0013] 2. When the sleeve needs to be replaced, the arc plate is pulled outward, and the arc plate moves the locking block away from the connecting frame. Then the frame can be pulled down to complete the disassembly, making it convenient to replace the sleeve. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the structure of this utility model;

[0015] Figure 2 This is a cross-sectional view of the connecting cylinder of this utility model;

[0016] Figure 3 This is a cross-sectional view of the hollow rod of this utility model.

[0017] In the diagram: 1. Mounting plate; 2. Motor; 3. Drive shaft; 4. Fixing frame; 5. Connecting cylinder; 6. Frame; 7. Sleeve; 8. Lead screw; 9. Pressure sensor; 10. Connecting plate; 11. Hollow rod; 12. First spring; 13. Movable rod; 14. Vertical plate; 15. Positioning block; 16. Connecting frame; 17. Arc plate; 18. Second spring; 19. Fixing disc; 20. Prism; 21. Locking block. Detailed Implementation

[0018] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0019] Secondly, the term "an embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The phrase "in one embodiment" appearing in different places in this specification does not necessarily refer to the same embodiment, nor is it a single or selective embodiment that excludes other embodiments.

[0020] Example 1:

[0021] Please see Figure 1 , Figure 2 and Figure 3 As shown, this utility model provides an automatic screw fastening machine tightening force adjustment device, including a mounting plate 1. A motor 2 is fixedly connected to the top of the mounting plate 1. A drive shaft 3 is fixedly connected to the output end of the motor 2. A fixing frame 4 is fixedly connected to the bottom of the drive shaft 3. A connecting cylinder 5 is fixedly connected to the bottom of the fixing frame 4. A frame 6 is inserted into the bottom of the connecting cylinder 5. A sleeve 7 is fixedly connected to the bottom of the frame 6. A lead screw 8 is threadedly connected to the central shaft at the top of the connecting cylinder 5. A pressure sensor 9 is movably connected to the bottom of the lead screw 8. A connecting plate 10 is fixedly connected to the bottom of the pressure sensor 9. Hollow rods 11 are movably connected to both sides of the connecting plate 10. A first spring 12 is fixedly connected to one side of the inner cavity. A movable rod 13 is fixedly connected to one side of the first spring 12. A vertical plate 14 is movably connected to one side of the movable rod 13. A positioning block 15 is fixedly connected to one side of the vertical plate 14. One side of the positioning block 15 is engaged with the connecting cylinder 5. The top of the connecting plate 10 is movably connected to the lead screw 8 through a bearing. A movable groove is opened on one side of the hollow rod 11. A horizontal rod is slidably connected to the inner cavity of the vertical plate 14. Both sides of the horizontal rod are fixedly connected to the connecting cylinder 5. Sliding sleeves are fixedly connected to the front and back of the movable rod 13. A sliding rod is slidably connected to the inner cavity of the sliding sleeve. Both sides of the sliding rod are fixedly connected to the hollow rod 11.

[0022] The specific function of this technical solution is as follows: When adjustment is required, the pressure value is set through the external PLC controller, and then the lead screw 8 is rotated. The lead screw 8 drives the pressure sensor 9 to move, the pressure sensor 9 drives the connecting plate 10 to move, the connecting plate 10 drives the hollow rod 11 to move, and the hollow rod 11 drives the first spring 12 to deform, thereby adjusting the pressure value. After the pressure sensor 9 detects that the pressure value is the same as the set value, the adjustment work is completed. After the screw is tightened during the operation, the operation of the motor 2 will cause the connecting cylinder 5 to continue to rotate, thereby moving the positioning block 15 away from the frame 6 and avoiding excessive torque that could damage the motor 2.

[0023] Example 2:

[0024] Based on Embodiment 1, this utility model is as follows: Figure 1 As shown, a connecting frame 16 is fixedly connected to the top of the outer surface of the frame 6. Prisms 20 are fixedly connected to both sides of the connecting cylinder 5. A fixing plate 19 is fixedly connected to one side of the prism 20. A second spring 18 is fixedly connected to one side of the fixing plate 19. An arc plate 17 is fixedly connected to one side of the second spring 18. A locking block 21 is fixedly connected to one side of the arc plate 17. One side of the locking block 21 is inserted into the connecting frame 16. A rectangular groove is opened on one side of the arc plate 17, and the inner cavity of the rectangular groove is slidably connected to the prism 20.

[0025] The specific function of this technical solution is as follows: When the sleeve 7 needs to be replaced, the arc plate 17 is pulled outward, and the arc plate 17 drives the locking block 21 to move away from the connecting frame 16. Then the frame 6 can be pulled down to complete the disassembly work, which makes it convenient to replace the sleeve 7.

[0026] Working principle: When adjustment is required, the pressure value is set through the external PLC controller, and then the lead screw 8 is rotated. The lead screw 8 drives the pressure sensor 9 to move, the pressure sensor 9 drives the connecting plate 10 to move, the connecting plate 10 drives the hollow rod 11 to move, and the hollow rod 11 drives the first spring 12 to deform, thereby adjusting the pressure value. After the pressure sensor 9 detects that the pressure value is the same as the set value, the adjustment work is completed. After the screw is tightened during the operation, the operation of the motor 2 will cause the connecting cylinder 5 to continue to rotate, thereby moving the positioning block 15 away from the frame 6 and avoiding excessive torque that could damage the motor 2.

[0027] When the sleeve 7 needs to be replaced, pull the arc plate 17 outward. The arc plate 17 drives the locking block 21 to move away from the connecting frame 16. Then, pull the frame 6 down to complete the disassembly and facilitate the replacement of the sleeve 7.

[0028] It is important to note that the constructions and arrangements of this application shown in several different exemplary embodiments are merely illustrative. Although only a few embodiments are described in detail in this disclosure, those who consult this disclosure will readily understand that many modifications are possible (e.g., changes in the size, dimensions, structure, shape and proportion of various elements, as well as parameter values ​​(e.g., temperature, pressure, etc.), mounting arrangements, use of materials, color, orientation, etc.) without substantially departing from the novel teachings and advantages of the subject matter described in this application). For example, an element shown as integrally formed may be composed of multiple parts or elements, the position of elements may be inverted or otherwise altered, and the nature or number or position of discrete elements may be changed or altered. Therefore, all such modifications are intended to be included within the scope of this utility model. The order or sequence of any process or method steps may be changed or rearranged according to alternative embodiments. In the claims, any "device plus function" clause is intended to cover the structure described herein that performs the function, and not only structural equivalents but also equivalent structures. Without departing from the scope of this invention, other substitutions, modifications, alterations, and omissions may be made in the design, operation, and arrangement of the exemplary embodiments. Therefore, this invention is not limited to the specific embodiments, but extends to various modifications that still fall within the scope of the appended claims.

[0029] Furthermore, in order to provide a concise description of exemplary embodiments, not all features of actual embodiments (i.e., those features that are not relevant to the best mode of carrying out the present invention as currently considered, or those features that are not relevant to implementing the present invention) may be omitted.

[0030] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit the scope of protection of this utility model. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of this utility model without departing from the essence and scope of the technical solutions of this utility model.

Claims

1. An automatic screw fastening machine tightening force adjustment device, comprising a mounting plate (1), characterized in that: A motor (2) is fixedly connected to the top of the mounting plate (1), a drive shaft (3) is fixedly connected to the output end of the motor (2), a fixing frame (4) is fixedly connected to the bottom of the drive shaft (3), a connecting cylinder (5) is fixedly connected to the bottom of the fixing frame (4), a frame (6) is inserted into the bottom of the connecting cylinder (5), a sleeve (7) is fixedly connected to the bottom of the frame (6), a lead screw (8) is threadedly connected to the central shaft at the top of the connecting cylinder (5), and a pressure sensor is movably connected to the bottom of the lead screw (8). 9) A connecting plate (10) is fixedly connected to the bottom of the pressure sensor (9). Hollow rods (11) are movably connected to both sides of the connecting plate (10). A first spring (12) is fixedly connected to one side of the inner cavity of the hollow rod (11). A movable rod (13) is fixedly connected to one side of the first spring (12). A vertical plate (14) is movably connected to one side of the movable rod (13). A positioning block (15) is fixedly connected to one side of the vertical plate (14). One side of the positioning block (15) is engaged with the connecting cylinder (5).

2. The automatic screw fastening machine tightening force adjustment device according to claim 1, characterized in that: A connecting frame (16) is fixedly connected to the top of the outer surface of the frame (6). A prism (20) is fixedly connected to both sides of the connecting cylinder (5). A fixing plate (19) is fixedly connected to one side of the prism (20). A second spring (18) is fixedly connected to one side of the fixing plate (19). An arc plate (17) is fixedly connected to one side of the second spring (18). A locking block (21) is fixedly connected to one side of the arc plate (17). One side of the locking block (21) is inserted into the connecting frame (16).

3. The automatic screw fastening machine tightening force adjustment device according to claim 1, characterized in that: The top of the connecting plate (10) is movably connected to the lead screw (8) via a bearing, and a movable groove is provided on one side of the hollow rod (11).

4. The automatic screw fastening machine tightening force adjustment device according to claim 1, characterized in that: The inner cavity of the vertical plate (14) is slidably connected to a horizontal bar, and both sides of the horizontal bar are fixedly connected to the connecting cylinder (5).

5. The automatic screw fastening machine tightening force adjustment device according to claim 1, characterized in that: The movable rod (13) is fixedly connected to the front and back of the sliding sleeve, and the inner cavity of the sliding sleeve is slidably connected to the sliding rod, and both sides of the sliding rod are fixedly connected to the hollow rod (11).

6. The automatic screw fastening machine tightening force adjustment device according to claim 2, characterized in that: A rectangular groove is provided on one side of the arc plate (17), and the inner cavity of the rectangular groove is slidably connected to the prism (20).

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