Screw Locking Device and Control Method

Abstract

The present invention relates to the field of automatic screw locking, and particularly to a screw locking device and a control method. The device includes: a screw locking tool assembly for driving the screw rod assembly to move; a control unit for controlling the screw locking tool assembly to descend; a detection unit for detecting whether the screw rod assembly enters the screw outer hole; the control unit is further configured to control the screw locking tool assembly to start when the screw rod assembly enters the screw outer hole, and control the screw locking tool assembly to drive the screw rod assembly to rotate according to a first preset condition; the detection unit is further configured to detect whether the screw rod assembly aligns with the screw head groove when the screw rod assembly rotates; the control unit is further configured to control the screw locking tool assembly to drive the screw rod assembly to rotate according to a second preset condition when the screw rod assembly aligns with the screw head groove, so as to lock the screw. Through the above device, the screw head groove can be accurately found in the deep screw outer hole, and the screw can be quickly locked.

Description

Technical Field

[0001] The present invention relates to the field of automatic screw locking, and particularly to a screw locking device and a control method. Background Art

[0002] Currently, when using an electric screwdriver to lock or loosen screws in the market, if using a device for automatic tightening / loosening of screws, in the case where the groove on the screw head and the screw rod of the device are not aligned, the rotation of the electric screwdriver will cause the screw thread to be damaged or the groove on the screw head to be damaged. In order to prevent the screw thread from being damaged, a visual guiding device is usually added to guide the electric screwdriver into the groove on the screw head. Since the use of vision has a high cost and is restricted by the usage scenario. For places where the screw is installed in a relatively deep screw outer hole, it is difficult to obtain a visual image due to the difficulty of lighting. Summary of the Invention

[0003] The main object of the present invention is to provide a screw locking device, a control method, an electronic device and a storage medium, aiming to solve the technical problem that it is difficult to align the groove on the screw head when the device automatically locks screws in the screw outer hole.

[0004] To achieve the above object, the present invention provides a screw locking device, the device includes a detection unit, a control unit, a screw locking tool assembly and a screw rod assembly, the screw rod assembly is installed in the screw rod clamping part of the screw locking tool assembly, wherein;

[0005] The screw locking tool assembly is used to drive the screw rod assembly to move;

[0006] The control unit is used to control the screw locking tool assembly to descend;

[0007] The detection unit is used to detect whether the screw rod assembly enters the screw outer hole;

[0008] The control unit is further used to, when the screw rod assembly enters the screw outer hole, control the screw locking tool assembly to start, and control the screw locking tool assembly to drive the screw rod assembly to rotate according to a first preset condition;

[0009] The detection unit is further used to detect whether the screw rod assembly aligns with the groove on the screw head when the screw rod assembly rotates;

[0010] The control unit is further used to, when the screw rod assembly aligns with the groove on the screw head, control the screw locking tool assembly to drive the screw rod assembly to rotate according to a second preset condition to lock the screw.

[0011] Preferably, the detection unit is further used to detect the type of the groove on the screw head and send a type signal to the control unit;

[0012] The control unit is further configured to generate a first preset condition according to the type signal, and control the screw locking tool assembly to drive the screw rod assembly to rotate according to the first preset condition.

[0013] Preferably, when the screw rod assembly is not aligned with the groove of the screw head, the control unit is further configured to control the screw locking tool assembly to lift and then lower again;

[0014] The detection unit is further configured to detect whether the screw rod assembly enters the outer hole of the screw when the screw locking tool assembly descends again;

[0015] When the screw rod assembly enters the outer hole of the screw, the control unit is further configured to control the screw locking tool assembly to drive the screw rod assembly to rotate according to the first preset condition again.

[0016] Preferably, when the number of times of controlling the screw locking tool assembly to lift and then lower reaches a preset number, the control unit is configured to control the screw locking tool assembly to stop working and alarm the user.

[0017] Preferably, the control unit is further configured to detect the state of the screw, and control the screw locking tool assembly to stop working when the state of the screw is tightened.

[0018] In addition, to achieve the above object, the present invention further provides a control method for a screw locking device, the method comprising:

[0019] The control unit controls the screw locking tool assembly to descend;

[0020] The detection unit detects whether the screw rod assembly enters the outer hole of the screw;

[0021] When the screw rod assembly enters the outer hole of the screw, the control unit controls the screw locking tool assembly to start, and controls the screw locking tool assembly to drive the screw rod assembly to rotate according to the first preset condition;

[0022] When the screw rod assembly rotates, the detection unit detects whether the screw rod assembly is aligned with the groove of the screw head;

[0023] When the screw rod assembly is aligned with the groove of the screw head, the control unit controls the screw locking tool assembly to drive the screw rod assembly to rotate according to a second preset condition to tighten the screw.

[0024] Preferably, the step that when the screw rod assembly enters the outer hole of the screw, the control unit controls the screw locking tool assembly to start and controls the screw locking tool assembly to drive the screw rod assembly to rotate according to the first preset condition specifically includes:

[0025] The detection unit detects the type of the groove on the head of the screw and sends a type signal to the control unit;

[0026] The control unit generates a first preset condition according to the type signal and controls the screw-locking tool assembly to drive the screw rod assembly to rotate according to the first preset condition.

[0027] Preferably, after the detection unit detects whether the screw rod assembly is aligned with the groove on the head of the screw when the screw rod assembly rotates, the method further includes:

[0028] When the screw rod assembly is not aligned with the groove on the head of the screw, the control unit controls the screw-locking tool assembly to lift and then lower again;

[0029] When the screw-locking tool assembly lowers again, the detection unit detects whether the screw rod assembly enters the outer hole of the screw;

[0030] When the screw rod assembly enters the outer hole of the screw, the control unit controls the screw-locking tool assembly to drive the screw rod assembly to rotate again according to the first preset condition.

[0031] Preferably, after the step that the control unit controls the screw-locking tool assembly to drive the screw rod assembly to rotate according to the first preset condition again when the screw rod assembly enters the outer hole of the screw, the method further includes:

[0032] When the number of times the screw-locking tool assembly lifts and then lowers reaches a preset number of times, the control unit controls the screw-locking tool assembly to stop working and alarms the user.

[0033] Preferably, after the step that the screw-locking tool assembly drives the screw rod assembly to rotate according to a second preset condition to lock the screw, the method further includes:

[0034] Detect the state of the screw, and when the state of the screw is locked, control the screw-locking tool assembly to stop working.

[0035] The present invention discloses a screw locking device, which includes a detection unit, a control unit, a screw locking tool assembly and a screw rod assembly. The screw rod assembly is installed in the screw rod clamping part of the screw locking tool assembly, wherein; the screw locking tool assembly is used to drive the screw rod assembly to move; the control unit is used to control the screw locking tool assembly to descend; the detection unit is used to detect whether the screw rod assembly enters the outer hole of the screw; the control unit is further used to control the screw locking tool assembly to start when the screw rod assembly enters the outer hole of the screw, and control the screw locking tool assembly to drive the screw rod assembly to rotate according to a first preset condition; the detection unit is further used to detect whether the screw rod assembly is aligned with the groove of the screw head when the screw rod assembly rotates; the control unit is further used to control the screw locking tool assembly to drive the screw rod assembly to rotate according to a second preset condition when the screw rod assembly is aligned with the groove of the screw head, so as to lock the screw. Through the above settings, the present invention realizes accurately finding the groove of the screw head in the deep outer hole of the screw and quickly locking the screw; effectively prevents the damage of the groove of the screw head caused by the misalignment of the screw rod assembly, saves manpower and material resources, improves the efficiency of mechanical installation, does not require the installation of a visual recognition device, and reduces the cost of automatic screw locking. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on the structures shown in these drawings.

[0037] Figure 1 It is a functional module diagram of the first embodiment of the screw locking device of the present invention;

[0038] Figure 2a It is a top view schematic diagram of a cross screw in the first embodiment of the screw locking device of the present invention;

[0039] Figure 2b It is a side view schematic diagram of a cross screw in the first embodiment of the screw locking device of the present invention;

[0040] Figure 2c It is a top view schematic diagram of an internal hexagonal screw in the first embodiment of the screw locking device of the present invention;

[0041] Figure 2d It is a side view schematic diagram of an internal hexagonal screw in the first embodiment of the screw locking device of the present invention;

[0042] Figure 2e It is a top view schematic diagram of a flat head screw in the first embodiment of the screw locking device of the present invention;

[0043] Figure 2f It is a schematic side view of a flat-head screw of the first embodiment of the screw locking device of the present invention;

[0044] Figure 3 It is a schematic structural diagram of the second embodiment of the screw locking device of the present invention;

[0045] Figure 4 It is a schematic flowchart of the first embodiment of the control method of the screw locking device of the present invention;

[0046] Figure 5 It is a schematic flowchart of the second embodiment of the control method of the screw locking device of the present invention.

[0047] Explanation of the reference numerals in the drawings:

[0048] Label Name Label Name 100 Control unit 101 Cylinder 200 Detection unit 201 Photoelectric switch 300 Screw-locking tool assembly 301 Electric screwdriver 400 Screw rod assembly 401 Hexagonal screw rod 500 Screw outer hole 501 Internal hexagonal screw 502 Groove in the head of the internal hexagonal screw Detailed implementation manners

[0049] It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0050] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0051] It should be noted that all the directional indications (such as up, down, left, right, front, back...) in the embodiments of the present invention are only used to explain the relative positional relationship and movement conditions between components in a specific posture (as shown in the drawings). If the specific posture changes, the directional indications will also change accordingly.

[0052] In addition, the descriptions involving "first", "second", etc. in the present invention are only for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one such feature. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the fact that those of ordinary skill in the art can implement them. When the combination of the technical solutions is contradictory or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the protection scope required by the present invention.

[0053] Refer to Figure 1 , Figure 1It is a functional block diagram of the first embodiment of the screw-locking device of the present invention; the first embodiment of the screw-locking device of the present invention provides a screw-locking device, which includes a detection unit 200, a control unit 100, a screw-locking tool assembly 300, and a screw rod assembly 400. The screw rod assembly 400 is installed in the screw rod clamping part of the screw-locking tool assembly 300, wherein;

[0054] The screw-locking tool assembly 300 is used to drive the screw rod assembly 400 to move;

[0055] It is easy to understand that there are many types of screws, such as hexagon socket countersunk head screws, round head cross recessed screws, flat head slotted screws, etc. Refer to Figure 2a -f, Figure 2a -f For the convenience of explaining the embodiments of the present invention, several screws that can be used as the screws in the embodiments of the present invention are shown; the area where the screw head is recessed and can accommodate the screw rod for screw-locking is the screw head groove. It should be noted that some screw heads are in the shape of external hexagons, etc. Similarly, there are corresponding screw rods for screw-locking for this type of screw. This type of screw rod has a recess at the screw rod head, corresponding to the head of the screw. In this embodiment, screws with recessed heads are used for explanation, which does not represent a limitation on the types of screws that the present invention can lock.

[0056] It should be noted that the screw-locking tool assembly 300 can be an electric screwdriver, an electric screw driver, or other electric screw-locking tools that can be used to insert the screw rod assembly 400 for screw-locking; the screw rod assembly 400 is various screw rod assemblies for screw-locking corresponding to different screw types, and the types of the screw-locking tool assembly 300 and the screw rod assembly 400 are not limited here.

[0057] The control unit 100 is used to control the screw-locking tool assembly 300 to descend;

[0058] It should be noted that the control unit 100 includes a clamping part that can clamp the screw-locking tool assembly 300; a moving part that can drive the screw rod assembly to move. The control unit 100 is connected to the screw-locking tool assembly 300 through a control line. The control unit 100 also includes a control chip, and the control chip can control the moving part to perform corresponding operations to drive the screw-locking tool to perform up and down movements and operations to find the position of the screw outer hole. The output end of the control chip is connected to the moving part to control the moving part to drive the screw-locking tool assembly 300, and another output end of the control chip is connected to the screw-locking tool assembly 300 to control the rotation mode of the screw-locking tool assembly.

[0059] The detection unit 200 is used to detect whether the screw rod assembly 400 enters the screw outer hole;

[0060] It is easy to understand that the hole for installing the screw is called a screw hole, the depression of the screw head is called a screw head groove, and the hole higher than the upper edge of the screw hole is called a screw outer hole; to prevent the screw from protruding during component installation, resulting in an uneven surface of the component and the screw head being prone to loosening due to outward protrusion, the screw outer hole on most joint components is higher than the thickness of the screw head to prevent the screw from protruding after being tightened. In this way, the screw outer hole is relatively high, and when locking the screw, it is impossible to align well with the screw head groove, resulting in wear of the head groove when the screw locking tool assembly 300 drives the screw rod assembly 400 to rotate at high speed. After the screw head groove is worn, the operations of locking and loosening the screw cannot be carried out normally.

[0061] It should be noted that the detection unit 200 can be a torque switch or a photoelectric switch. When the detection unit 200 is a photoelectric switch, the photoelectric switch detects whether it enters the screw outer hole by detecting the position of the screw rod assembly 400. The photoelectric switch is connected to the control unit 200 and sends the detection result to the control unit 200. The photoelectric switch can also remind the user whether the screw rod assembly 400 enters the screw outer hole and whether it enters the screw head groove by lighting and dimming. When the detection unit 200 is a torque switch, the torque switch detects the torque state of the screw locking tool assembly 300 to judge whether it enters the screw outer hole and whether it aligns with the screw head groove.

[0062] The control unit 100 is further configured to control the screw locking tool assembly 400 to start when the screw rod assembly 400 enters the screw outer hole, and control the screw locking tool assembly 300 to drive the screw rod assembly 400 to rotate according to the first preset condition.

[0063] It should be noted that the screw rod assembly 400 is a magnetic component. When the screw is an iron screw or a screw containing iron, it has an adsorption effect on the screw. In the case of aligning the screw, it can automatically approach the screw and catch the head groove to prepare for tightening the screw.

[0064] Reference Figure 2a 、 2b 、2c, 2d, 2e, 2f; Figure 2a is the top view of a cross screw, Figure 2b is the side view of a cross screw, Figure 2c is the top view of an internal hexagonal screw, Figure 2d is the side view of an internal hexagonal screw, Figure 2e is the top view of a flat head screw, Figure 2f is the side view of a flat head screw.

[0065] It should be noted that the first preset condition is determined according to the screw rotation port. Taking a flat-head screw as an example, the degree of one rotation port of a flat-head screw is 360 degrees divided by 2, and the degree of one rotation port is 180 degrees; taking an internal hexagon screw as an example, the degree of one rotation port of an internal hexagon screw is 360 degrees divided by 6, and the degree of one rotation port is 60 degrees. Similarly, for a cross-head screw, it is 90 degrees. The first preset condition is to rotate at a low speed by the degree of one rotation port according to the screw rotation port, and the low speed is the first preset speed. The first preset speed is set according to the actual situation. Preferably, the setting condition is that when the screw rod assembly 400 rotates at the first preset speed, there is almost no wear on the groove of the screw head, and the first preset speed is not too low to cause low efficiency of the automatic screw-locking operation, etc.

[0066] It is easy to understand that due to the characteristics of the screw rod assembly 400 described above, when the screw rod assembly 400 rotates one rotation port, if the screw is correctly placed in the screw hole, the screw rod assembly 400 will align with the groove of the screw head and catch the groove of the head.

[0067] The detection unit 200 is further configured to detect whether the screw rod assembly 400 aligns with the groove of the screw head when the screw rod assembly 400 rotates;

[0068] The control unit 100 is further configured to control the screw-locking tool assembly 300 to drive the screw rod assembly 400 to rotate according to the second preset condition to lock the screw when the screw rod assembly 400 aligns with the groove of the screw head.

[0069] It is easy to understand that when the screw rod assembly 400 rotates, it can be detected whether the screw rod assembly 400 aligns with the groove of the head. When the screw rod assembly 400 aligns, the screw rod assembly 400 catches the groove of the head, and at this time, the screw-locking operation can be started.

[0070] It should be noted that the second preset condition is rapid rotation, and the second preset condition is the screw-locking speed in the normal state; considering the wear of the screw type, screw thread, and screw hole thread, the rotation speed in the second preset condition can be set according to the actual situation.

[0071] This embodiment can be understood in three steps: finding the position of the outer hole of the screw, performing the action of aligning the groove of the screw head when the outer hole of the screw is aligned, and starting to lock the screw if the groove of the head is aligned.

[0072] Through the above settings, this embodiment realizes accurately finding the groove of the screw head in the deep screw outer hole and quickly locking the screw; effectively preventing the damage of the groove of the screw head caused by the misalignment of the screw rod assembly, saving manpower and material resources, improving the efficiency of mechanical installation, eliminating the need for installing a vision recognition device, and reducing the cost of automatic screw locking.

[0073] Reference Figure 3 , Figure 3 is a schematic structural diagram of the second embodiment of the screw locking device of the present invention; based on the first embodiment of the screw locking device of the present invention described above, a schematic structural diagram of the second embodiment of the screw locking device of the present invention is proposed. In this embodiment, the moving part of the control unit 100 is a cylinder 101, and the control unit 100 is shown only partially in Figure 3 , which does not affect the function of the control unit 100. The detection unit 200 is a photoelectric switch 201 in Figure 3 , the screw locking tool assembly 300 is an electric screwdriver 301, the screw rod assembly 400 is a hexagonal screw rod 401, the screw is an internal hexagonal screw 501, and the screw head groove is an internal hexagonal screw head groove 502. Figure 3 The detection unit 200 is further configured to detect the type of the screw head groove and send a type signal to the control unit 100;

[0074] It should be noted that in this embodiment, the photoelectric switch 201 can identify the type of the screw rod assembly 400 when installing the screw rod assembly 400 and inform the control unit 100 of the type of the screw head groove.

[0075] It is easy to understand that if the type of the screw rod assembly 400 is known to the user, the user can directly set the type, write the type into the storage unit of the control unit 100, and the control unit 100 directly controls it.

[0076] The control unit 100 is further configured to generate a first preset condition according to the type signal, and control the screw locking tool assembly 300 to drive the screw rod assembly 400 to rotate according to the first preset condition.

[0077] It should be noted that in this embodiment, the screw head groove is an internal hexagon, and the degree of one rotation port is 60 degrees, that is, the first preset condition is to drive the screw rod assembly 400 to rotate 60 degrees at a first preset speed. When the screw is correctly placed in the screw hole, the head groove of the screw is parallel to and aligned with the upper edge of the screw outer hole, and the screw rod assembly 400 can align and engage with the head groove within one rotation port degree.

[0078] The control unit 100 is further configured to control the screw locking tool assembly to lift and then lower again when the screw rod assembly is not aligned with the screw head groove;

[0079] The control unit 100 is further configured to control the screw locking tool assembly to lift and then lower again when the screw rod assembly is not aligned with the screw head groove;

[0080] It is easy to understand that if the screw is not placed correctly in the screw hole, the head groove of the screw is not initially aligned parallel to the upper edge of the screw outer hole, and it is very difficult for the screw rod assembly 400 to perform the alignment operation. In this case, it is necessary to lift and then lower, and perform the alignment operation again.

[0081] The detection unit 200 is further configured to detect whether the screw rod assembly 400 enters the screw outer hole when the screw locking tool assembly 300 descends again;

[0082] It is easy to understand that if the head of the screw rod assembly 400 leaves the inside of the screw outer hole during the process of lifting and then lowering, due to reasons such as mechanical vibration, there is a risk of deviation from the screw outer hole when descending again, and it is necessary for the detection unit 200 to detect again to prevent problems before they occur. If the head of the screw rod assembly 400 does not leave the inside of the screw outer hole, this step can also be omitted.

[0083] The control unit is further configured to, when the screw rod assembly enters the screw outer hole, control the screw locking tool assembly to drive the screw rod assembly to rotate again according to the first preset condition.

[0084] It is easy to understand that when descending again, the action of aligning the head groove of the screw is performed again. This is a cyclic operation and will not be elaborated here.

[0085] The control unit 100 is further configured to, when the number of times of lifting and then lowering the screw locking tool assembly 300 reaches the preset number of times, control the screw locking tool assembly 300 to stop working and alarm the user.

[0086] It should be noted that in the case where the screw is not placed correctly in the screw hole, the screw can be lifted and then lowered together with the screw rod assembly through the adsorption action of the screw rod assembly 400 to find the correct position placed in the screw hole, or the screw can borrow force through the descent of the screw rod assembly 400 to be placed correctly; but in some cases, the above solutions cannot make the screw placed correctly, and the number of times of lifting and then lowering reaches the preset number of times, and the user needs to manually place the screw in the screw hole correctly.

[0087] It should be noted that the preset number of times can be set according to the actual situation. Preferably, it can be set to a single-digit number to speed up the progress of the screw locking operation and alarm the user as soon as possible to detect the problem of the screw being placed crooked.

[0088] The control unit 100 is further configured to detect the state of the screw and control the screw locking tool assembly 300 to stop working when the state of the screw is locked.

[0089] It is easy to understand that when the screw has been tightened, driving the rotation of the screw rod assembly 400 by the screw locking tool assembly 300 will feel that the resistance reaches a certain threshold; the control unit 100 is connected to the screw locking tool assembly 300 and can detect the operating state of the screw locking tool assembly 300. When it detects that the resistance has reached the preset threshold, it can know that the screw is tightened and control the screw locking tool assembly 300 to stop working.

[0090] It is easy to understand that after tightening the screw, the control unit 100 can control the screw locking tool assembly 300 to lift and control the screw locking tool assembly 300 to move to the next screw, and repeat all the above actions to achieve automatic mechanical screw locking.

[0091] In a specific implementation, the screw locking device has a screw rod assembly. When the screw rod assembly matches the groove of the screw head, it can not only perform the screw locking operation, but also perform the screw loosening operation if the screw rod assembly is controlled to rotate in the reverse direction.

[0092] According to the first preset condition and the second preset condition, reversing the conditions can obtain the first screw loosening preset condition and the second screw loosening preset condition. The screw loosening operation can be performed according to the first screw loosening preset condition and the second screw loosening preset condition. The specific control method is the same as that of screw locking.

[0093] It is easy to understand that if there is a need to disassemble a component, that is, there is a need to loosen the screw. When the screw hole on the component is relatively deep, the screw locking device of the present invention is also applicable to loosening the screw. The control unit 100 can detect whether the screw is tightened according to the resistance received by the screw rod assembly. Similarly, it can detect whether the screw is loosened according to the resistance received by the screw rod assembly. When the screw is completely loosened, the control unit controls the screw locking tool assembly to stop working.

[0094] It is easy to understand that as described in the above embodiments, the screw rod assembly is a magnetic part. If the screw is made of iron or contains iron, the screw rod assembly can adsorb the screw and take the screw out of the screw hole, which facilitates the worker to disassemble the component. After performing the screw loosening operation, the control unit can control the screw locking tool assembly to lift and control the screw locking tool assembly to move to the next screw, and repeat all the above actions to achieve automatic mechanical screw loosening.

[0095] The embodiment of the present invention prevents the screw locking operation from being unable to be performed due to inaccurate placement of the screw during the screw locking action, effectively discovers potential hazards and alarms and prompts the user. After tightening the screw, the device can automatically stop, preventing the repeated tightening of the screw from causing wear of the groove of the screw head and damage to the screw rod assembly and the screw locking tool assembly.

[0096] Reference Figure 4 , Figure 4 is a schematic flowchart of the first embodiment of the control method for the screw locking device of the present invention;

[0097] In addition, to achieve the above object, the present invention also proposes a control method for a screw locking device, characterized in that the method includes:

[0098] Step S100: The control unit controls the screw locking tool assembly to descend;

[0099] It should be noted that the control unit includes a clamping part that can clamp the screw locking tool assembly; a moving part that can drive the screw rod assembly to move. The control unit is connected to the screw locking tool assembly through a control line, and the control unit also includes a control chip, and the control chip can control the moving part to perform corresponding operations to drive the screw locking tool to perform up and down movements and operations to find the position of the screw outer hole.

[0100] Step S200: The detection unit detects whether the screw rod assembly enters the screw outer hole;

[0101] It should be noted that the detection unit can be a torque switch or a photoelectric switch. When the detection unit is a photoelectric switch, the photoelectric switch detects whether it enters the screw outer hole by detecting the position of the screw rod assembly. The photoelectric switch is connected to the control unit and sends the detection result to the control unit. The photoelectric switch can also remind the user whether the screw rod assembly enters the screw outer hole and whether it enters the screw head groove through light and darkness. When the detection unit is a torque switch, the torque switch detects the torque state of the screw locking tool assembly to judge whether it enters the screw outer hole and whether it aligns with the screw head groove.

[0102] Step S300: When the screw rod assembly enters the screw outer hole, the control unit controls the screw locking tool assembly to start and drives the screw rod assembly to rotate according to a first preset condition;

[0103] It should be noted that the screw rod assembly is a magnetic component. When the screw is an iron screw or an iron-containing screw, it has an adsorption effect on the screw. In the case of aligning the screw, it can automatically approach the screw and catch the head groove to prepare for tightening the screw.

[0104] It should be noted that the first preset condition is determined according to the screw rotation opening. Taking a flat-head screw as an example, the degree of one rotation opening of a flat-head screw is 360 degrees divided by 2, and the degree of one rotation opening is 180 degrees; taking an internal hexagon screw as an example, the degree of one rotation opening of an internal hexagon screw is 360 degrees divided by 6, and the degree of one rotation opening is 60 degrees. Similarly, for a cross-head screw, it is 90 degrees. The first preset condition is to rotate at a low speed by the degree of one rotation opening according to the screw rotation opening, and the low speed is the first preset speed. The first preset speed is set according to the actual situation. Preferably, the setting condition is that when the screw rod assembly 400 rotates at the first preset speed, there is almost no wear on the groove of the screw head, and the first preset speed is not too low to cause low efficiency of the automatic screw-locking operation, etc.

[0105] It is easy to understand that due to the characteristics of the screw rod assembly described above, when the screw rod assembly rotates one rotation opening, if the screw is correctly placed in the screw hole, the screw rod assembly will align with the groove of the screw head and catch the groove of the head.

[0106] Step S400: When the screw rod assembly rotates, the detection unit detects whether the screw rod assembly aligns with the groove of the screw head.

[0107] Step S500: When the screw rod assembly aligns with the groove of the screw head, the control unit controls the screw-locking tool assembly to drive the screw rod assembly to rotate according to the second preset condition to lock the screw.

[0108] It is easy to understand that when the screw rod assembly 400 rotates, it can be detected whether the screw rod assembly 400 aligns with the groove of the head. When the screw rod assembly 400 aligns, the screw rod assembly 400 catches the groove of the head, and at this time, the screw-locking operation can start.

[0109] It should be noted that the second preset condition is rapid rotation, and the second preset condition is the screw-locking speed in the normal state; considering the wear of the screw type, screw threads, and screw hole threads, the rotation speed in the second preset condition can be set according to the actual situation.

[0110] This implementation method realizes accurately finding the groove of the screw head in the deep screw outer hole and quickly locking the screw; effectively prevents the damage of the groove of the screw head caused by the misalignment of the screw rod assembly, saves manpower and material resources, improves the efficiency of mechanical installation, does not require the installation of a vision recognition device, and reduces the cost of automatic screw-locking.

[0111] Based on the first embodiment of the control method of the screw-locking device of the present invention, the second embodiment of the control method of the screw-locking device of the present invention is proposed. Refer to Figure 5 , Figure 5 is the flow schematic diagram of the second embodiment of the control method of the screw-locking device of the present invention.

[0112] Step S300 specifically includes:

[0113] Step S301: The detection unit detects the type of the groove on the head of the screw and sends a type signal to the control unit;

[0114] It is easy to understand that if the type of the screw rod assembly is known to the user, the user can directly set the type and write the type into the storage unit of the control unit. It can be directly controlled by the control unit, and this step can be omitted.

[0115] It is easy to understand that when the detection unit is an optoelectronic switch, the optoelectronic switch can identify the type of the screw rod assembly when installing the screw rod assembly and inform the control unit of the type of the groove on the head of the screw.

[0116] Step S302: The control unit generates a first preset condition according to the type signal and controls the screw locking tool assembly to drive the screw rod assembly to rotate according to the first preset condition.

[0117] It is easy to understand that as can be seen from the above embodiments, the first preset condition is set according to the type of the groove on the head of the screw and the first preset rotation speed. After obtaining the type signal, the first preset condition can be generated, and the screw locking tool assembly is driven to drive the screw rod assembly to rotate according to the first preset condition.

[0118] After step S400, the method further includes:

[0119] Step S401: When the screw rod assembly is not aligned with the groove on the head of the screw, the control unit controls the screw locking tool assembly to lift and then lower again;

[0120] It is easy to understand that if the screw is not placed correctly in the screw hole, the groove on the head of the screw is not initially parallel to the upper edge of the outer hole of the screw, and it is very difficult for the screw rod assembly to perform the alignment operation. In this case, it is necessary to lift and then lower to perform the alignment operation again.

[0121] Step S402: When the screw locking tool assembly lowers again, the detection unit detects whether the screw rod assembly enters the outer hole of the screw;

[0122] It is easy to understand that if the head of the screw rod assembly leaves the inside of the outer hole of the screw during the process of lifting and then lowering, due to mechanical vibration and other reasons, there is a hidden danger of deviating from the outer hole of the screw when lowering again, and it is necessary for the detection unit to detect again to prevent problems before they occur. If the head of the screw rod assembly does not leave the inside of the outer hole of the screw, this step can also be omitted.

[0123] Step S403: When the screw assembly enters the screw outer hole, the control unit controls the screw locking tool assembly to drive the screw assembly to rotate again according to the first preset condition.

[0124] It is easy to understand that the action of aligning the groove of the screw head is performed again when it descends again. This is a cyclic operation and will not be described in detail here.

[0125] After step S403, the method further includes:

[0126] Step S501: When the number of times the screw locking tool assembly is lifted and then lowered reaches a preset number, the control unit controls the screw locking tool assembly to stop working and alerts the user.

[0127] It should be noted that, when the screw is not placed correctly in the screw hole, the adsorption effect of the screw assembly can be used to lift the screw together with the screw assembly and then drop it to find the correct position in the screw hole, or the screw assembly can be dropped to give the screw a force to be placed correctly; however, in some cases, the above solutions cannot place the screw correctly, and the number of lifting and dropping reaches a preset number, and the user is required to manually place the screw in the screw hole correctly.

[0128] It should be noted that the preset number of times can be set according to actual conditions, and preferably can be set to a single-digit number to speed up the progress of the screw locking operation and alert the user as early as possible to detect the problem of crooked screw placement.

[0129] After step S500, the method further includes:

[0130] Step S502: Detect the state of the screw, and control the screw locking tool assembly to stop working when the screw is in the locked state.

[0131] It is easy to understand that when the screw is already tightened, the screw locking tool assembly drives the screw assembly to rotate, and the resistance will reach a certain threshold; the control unit is connected to the screw locking tool assembly and can detect the operating status of the screw locking tool assembly. When it is detected that the resistance has reached a preset threshold, it can be known that the screw is locked, and the screw locking tool assembly can be controlled to stop working.

[0132] It is easy to understand that after tightening the screw, the control unit can control the screw locking tool assembly to lift up, and control the screw locking tool assembly to move to the next screw, and repeat all the above actions to achieve mechanical automatic screw locking.

[0133] In a specific implementation, the screw locking device has a screw rod assembly. When the screw rod assembly matches the groove of the screw head, it can not only perform the screw locking operation, but also perform the screw loosening operation if the rotation of the screw rod assembly is reversed.

[0134] According to the first preset condition and the second preset condition, reversing the conditions can obtain the first screw loosening preset condition and the second screw loosening preset condition. The screw loosening operation can be performed according to the first screw loosening preset condition and the second screw loosening preset condition. The specific control method is the same as that of screw locking.

[0135] It is easy to understand that if there is a need to disassemble a component, that is, there is a need to loosen a screw. In the case where the screw hole on the component is relatively deep, the screw locking device of the present invention is also applicable to loosening the screw. The control unit 100 can detect whether the screw is tightened according to the resistance received by the screw rod assembly. Similarly, it can detect whether the screw is loosened according to the resistance received by the screw rod assembly. When the screw is completely loosened, the control unit controls the screw locking tool assembly to stop working.

[0136] It is easy to understand that as described in the above embodiments, the screw rod assembly is a magnetic part. If the screw is made of iron or contains iron, the screw rod assembly can adsorb the screw and take the screw out of the screw hole, which facilitates the worker to disassemble the component. After performing the screw loosening operation, the control unit can control the screw locking tool assembly to lift and control the screw locking tool assembly to move to the next screw, and repeat all the above actions to achieve automatic mechanical screw loosening.

[0137] The embodiment of the present invention prevents the screw locking operation from being unable to be performed due to inaccurate placement of the screw during the screw locking action, effectively discovers potential hazards and gives an alarm prompt to the user. After the screw is tightened, the device can automatically stop, preventing the wear of the groove of the screw head caused by repeated screw tightening and the damage to the screw rod assembly and the screw locking tool assembly. At the same time, the method of this embodiment can also be used for the screw loosening operation, realizing the automation of screw loosening / locking, and preventing the damage to the groove of the screw head caused by the screw rod assembly not being aligned with the groove of the screw head.

[0138] It should be understood that the above is only for illustration and does not constitute any limitation to the technical solution of the present invention. In specific applications, those skilled in the art can set according to needs, and the present invention does not limit this.

[0139] It should be noted that the above-described work process is only illustrative and does not limit the protection scope of the present invention. In actual applications, those skilled in the art can select some or all of them according to actual needs to achieve the purpose of the embodiment scheme, and there is no limitation here.

[0140] In addition, for the technical details not described in detail in this embodiment, reference may be made to the method for controlling a screw locking device provided in any embodiment of the present invention, which will not be elaborated here.

[0141] In addition, it should be noted that in this document, the terms "including", "comprising" or any other variant thereof are intended to cover non-exclusive inclusion, such that a process, method, article or system including a series of elements not only includes those elements but also includes other elements not expressly listed, or further includes elements inherent to such process, method, article or system. Without further limitation, an element defined by the statement "including a..." does not exclude the existence of additional identical elements in the process, method, article or system including that element.

[0142] The serial numbers of the above embodiments of the present invention are only for description and do not represent the superiority or inferiority of the embodiments.

[0143] Through the description of the above embodiments, those skilled in the art can clearly understand that the above embodiment methods can be implemented by means of software plus a necessary general hardware platform. Of course, they can also be implemented by hardware, but in many cases the former is a better implementation method. Based on such an understanding, the technical solution of the present invention, in essence, or the part that contributes to the prior art can be embodied in the form of a software product. This computer software product is stored in a storage medium (such as a Read Only Memory (ROM) / RAM, magnetic disk, optical disc), and includes several instructions for causing a terminal device (which may be a mobile phone, computer, server, or network device, etc.) to execute the methods described in various embodiments of the present invention.

[0144] The above are only the preferred embodiments of the present invention, and do not limit the patent scope of the present invention accordingly. Any equivalent structural or equivalent process transformation made by using the specification and drawings of the present invention, or directly or indirectly applied in other related technical fields, shall be equally included in the patent protection scope of the present invention.

Claims

1. A screw locking device, characterized in that, The device includes a detection unit, a control unit, a screw-locking tool assembly, and a screw rod assembly. The screw rod assembly is installed in the screw rod clamping part of the screw-locking tool assembly, where; The screw-locking tool assembly is used to drive the screw rod assembly to move; The control unit is used to control the screw-locking tool assembly to descend; The detection unit is used to detect whether the screw rod assembly enters the screw outer hole; The control unit is further used to, when the screw rod assembly enters the screw outer hole, control the screw-locking tool assembly to start, and control the screw-locking tool assembly to drive the screw rod assembly to rotate according to a first preset condition; The detection unit is further used to, when the screw rod assembly rotates, detect whether the screw rod assembly aligns with the screw head groove; The control unit is further used to, when the screw rod assembly aligns with the screw head groove, control the screw-locking tool assembly to drive the screw rod assembly to rotate according to a second preset condition to lock the screw; where, the detection unit is a photoelectric switch or a torque switch; when the detection unit is a photoelectric switch, the photoelectric switch detects whether the screw rod assembly enters the screw outer hole and whether it aligns with the screw head groove by detecting the position of the screw rod assembly; when the detection unit is a torque switch, the torque switch detects the torque state of the screw-locking tool assembly to judge whether the screw rod assembly enters the screw outer hole and whether it aligns with the screw head groove; and, The first preset condition is: rotate at a low speed by a certain number of degrees according to the screw rotation port, and the low speed is a first preset speed; where, when the screw rod assembly rotates at the first preset speed, there is no wear on the screw head groove, and the first preset speed is not too low to cause low efficiency of the automatic screw-locking operation; The second preset condition is: rotate quickly, and the speed of the quick rotation is the screw-locking speed in the normal state.

2. The screw locking device according to claim 1, wherein The detection unit is further used to detect the type of the screw head groove and send a type signal to the control unit; The control unit is further used to generate a first preset condition according to the type signal and control the screw-locking tool assembly to drive the screw rod assembly to rotate according to the first preset condition.

3. The screw locking device according to claim 2, characterized in that, The control unit is further used to, when the screw rod assembly does not align with the screw head groove, control the screw-locking tool assembly to lift and then descend again; The detection unit is further used to, when the screw-locking tool assembly descends again, detect whether the screw rod assembly enters the screw outer hole; The control unit is further used to, when the screw rod assembly enters the screw outer hole, again control the screw-locking tool assembly to drive the screw rod assembly to rotate according to the first preset condition.

4. The screw locking device according to claim 3, characterized in that, The control unit is further used to, when the number of times of controlling the screw-locking tool assembly to lift and then descend reaches a preset number of times, control the screw-locking tool assembly to stop working and alarm the user.

5. The screw locking device according to claim 4, characterized in that, The control unit is further used to detect the screw state and control the screw-locking tool assembly to stop working when the screw state is locked.

6. A method for controlling a screw locking device, characterized in that, The method includes: The control unit controls the screw-locking tool assembly to descend; The detection unit detects whether the screw rod assembly enters the screw outer hole; When the screw assembly enters the outer hole of the screw, the control unit controls the start of the screw locking tool assembly and controls the screw locking tool assembly to drive the screw assembly to rotate according to a first preset condition; When the screw assembly rotates, the detection unit detects whether the screw assembly is aligned with the groove of the screw head; When the screw assembly is aligned with the groove of the screw head, the control unit controls the screw locking tool assembly to drive the screw assembly to rotate according to a second preset condition to lock the screw; wherein, the detection unit is a photoelectric switch or a torque switch; when the detection unit is a photoelectric switch, the photoelectric switch detects whether the screw assembly enters the outer hole of the screw and whether it is aligned with the groove of the screw head by detecting the position of the screw assembly; when the detection unit is a torque switch, the torque switch detects the torque state of the screw locking tool assembly to judge whether the screw assembly enters the outer hole of the screw and whether it is aligned with the groove of the screw head; and, The first preset condition is: rotate at a low speed by a certain degree of a rotation port according to the screw rotation port, and the low speed is a first preset speed; wherein, when the screw assembly rotates at the first preset speed, there is no wear on the groove of the screw head, and the first preset speed is not too low to cause low efficiency of the automatic screw locking operation; The second preset condition is: rotate quickly, and the speed of the quick rotation is the screw locking speed in the normal state.

7. The control method of the screw locking device according to claim 6, characterized in that, The steps of the control unit controlling the start of the screw locking tool assembly when the screw assembly enters the outer hole of the screw and controlling the screw locking tool assembly to drive the screw assembly to rotate according to the first preset condition specifically include: The detection unit detects the type of the groove of the screw head and sends a type signal to the control unit; The control unit generates a first preset condition according to the type signal and controls the screw locking tool assembly to drive the screw assembly to rotate according to the first preset condition.

8. The method for controlling a screw locking device according to claim 7, wherein, After the step of the detection unit detecting whether the screw assembly is aligned with the groove of the screw head when the screw assembly rotates, the method further includes: When the screw assembly is not aligned with the groove of the screw head, the control unit controls the screw locking tool assembly to lift and then lower again; When the screw locking tool assembly lowers again, the detection unit detects whether the screw assembly enters the outer hole of the screw; When the screw assembly enters the outer hole of the screw, the control unit controls the screw locking tool assembly to drive the screw assembly to rotate again according to the first preset condition.

9. The method for controlling a screw locking device according to claim 8, wherein, After the step of the control unit controlling the screw locking tool assembly to drive the screw assembly to rotate again according to the first preset condition when the screw assembly enters the outer hole of the screw, the method further includes: When the number of times the screw locking tool assembly lifts and lowers reaches a preset number of times, the control unit controls the screw locking tool assembly to stop working and alarms the user.

10. The method for controlling a screw locking device according to claim 9, wherein, After the step of controlling the screw locking tool assembly to drive the screw assembly to rotate according to the second preset condition to lock the screw, the method further includes: Detect the state of the screw, and control the screw locking tool assembly to stop working when the state of the screw is locked.

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