Screw fastening device and automatic screw locking equipment

Abstract

The present application provides a screw fastening device and an automatic screw locking device, comprising a main machine, a screw placement seat, a workpiece and a screw fastening device; the screw fastening device comprises a rotating seat, a rotating shaft and a pick-and-place assembly; the rotating seat is sleeved outside the rotating shaft, the rotating seat and the rotating shaft are coaxially arranged, the rotating shaft is installed on the main machine, and the rotating shaft can be driven by the main machine to drive the rotating seat to rotate and lift; the pick-and-place assembly is installed on the rotating seat, and the pick-and-place assembly can move toward the screw to fix and remove the screw under the drive of the rotating seat, and the pick-and-place assembly can detach from the screw after the screw is locked on the workpiece; the screw placement seat is spaced apart from the workpiece, and the main machine is used to drive the screw fastening device to move to the screw placement seat to fix and remove the screw, and the main machine is also used to drive the screw fastening device and the screw to move to the workpiece to lock the screw on the workpiece. The automatic screw locking device of the present application can not only automatically lock screws, but also automatically pick and place screws, thereby improving the efficiency of screw locking.

Description

Technical Field

[0001] The present application belongs to the technical field of screw locking tools, and more specifically, relates to a screw fastening device and an automatic screw locking device. Background Art

[0002] In the manufacturing industry, screw tightening is often required to connect and secure workpieces. The screw tightening process is repetitive and tedious, and is typically performed manually or with screw tightening equipment on production lines. This involves manually placing the screws on the workpiece and then tightening them. However, manual screw tightening is inefficient and can easily lead to screws being placed in the wrong hole. For example, placing a large screw in a small hole can cause serious damage to the threads in the smaller hole, ultimately damaging the workpiece and rendering it scrapped. Summary of the Invention

[0003] The purpose of the embodiments of the present application is to provide a screw fastening device and an automatic screw locking device to solve the technical problem in the prior art that manual placement of screws leads to low screw locking efficiency.

[0004] To achieve the above-mentioned purpose, the technical solution adopted in this application is: to provide a screw fastening device, including a rotating seat, a rotating shaft and a pick-and-place assembly; the rotating seat is arranged outside the rotating shaft, the rotating seat and the rotating shaft are coaxially arranged, and the rotating shaft can be driven by an external driving structure to drive the rotating seat to rotate and lift; the pick-and-place assembly is installed on the rotating seat, and the pick-and-place assembly can move toward the screw and remove the screw under the drive of the rotating seat, and the pick-and-place assembly can detach from the screw after the screw is locked on the workpiece.

[0005] In a possible design, the pick-and-place assembly fixes the screw by magnetic adsorption and / or elastic snap connection.

[0006] In one possible design, the pick-and-place assembly includes:

[0007] A mounting seat, the mounting seat being mounted on the rotating seat;

[0008] a spring piece, the spring piece being mounted on the mounting seat, the spring piece having at least two protrusions exposed from the mounting seat, the at least two protrusions being used to elastically press against the hexagonal holes of the screw;

[0009] A magnetic component is installed on the rotating seat and is used to absorb and fix the screw.

[0010] In a possible design, the screw fastening device also includes an elastic member; a circumferential limit is formed between the rotating shaft and the rotating seat, and the rotating shaft is axially slidably arranged in the rotating seat; the opposite ends of the elastic member are respectively abutted between the rotating seat and the rotating shaft along the axial direction of the rotating shaft.

[0011] In a possible design, the screw fastening device further includes a clutch mechanism, which is connected between the rotating shaft and the rotating seat, and is used to unlock the circumferential limit between the rotating shaft and the rotating seat after the screw is tightened.

[0012] In a possible design, the clutch mechanism includes a grinding assembly and an adjustment assembly; the grinding assembly is arranged between the rotating shaft and the rotating seat, and the grinding assembly includes a plurality of first grinding sheets and a plurality of second grinding sheets arranged in sequence and stacked along the axial direction; a circumferential limit is formed between each of the first grinding sheets and the rotating seat, and a circumferential limit is formed between each of the second grinding sheets and the rotating shaft; the adjustment assembly is used to adjust the preset friction force between the first grinding sheet and the second grinding sheet.

[0013] In a possible design, the adjustment assembly includes a sleeve, a pressure cover, a bolt and a nut; the sleeve is sleeved between the rotating seat and the grinding assembly, and a circumferential limit is formed between the outer circumferential wall of the sleeve and the rotating seat, and a circumferential limit is formed between the inner circumferential wall of the sleeve and the first grinding sheet; the sleeve has a base plate at one axial end, and each first grinding sheet and each second grinding sheet are stacked on the base plate in sequence, and the pressure cover is located at the other axial end of the sleeve and abuts against the first grinding sheet or the second grinding sheet; the bolts are respectively passed through the pressure cover and the sleeve, and the nut is sleeved on the bolt and abuts against the sleeve; the preset friction force between the first grinding sheet and the second grinding sheet is adjusted by rotating the nut.

[0014] In a possible design, the pressure cover includes an abutment ring and a mounting ring that are connected to each other; the outer diameter of the abutment ring is smaller than the outer diameter of the mounting ring; the end of the abutment ring facing away from the mounting ring abuts against the first frosting sheet or the second frosting sheet, and the bolt is installed on the mounting ring; the outer wall of the mounting ring and the inner wall of the rotating seat form a circumferential limit, and the mounting ring is axially slidable on the rotating seat.

[0015] In a possible design, the adjustment assembly includes multiple bolts and multiple nuts, and the multiple bolts are distributed circumferentially between the sleeve and the pressure cover, and each bolt is installed with a nut; the adjustment assembly also includes multiple limiting columns, the sleeve is provided with multiple first positioning holes distributed circumferentially, and the pressure cover is provided with multiple second positioning holes distributed circumferentially, and the multiple first positioning holes and the multiple second positioning holes are arranged in a one-to-one correspondence along the circumference of the sleeve; one end of each limiting column is inserted into a first positioning hole, and the other end of each limiting column is inserted into a second positioning hole.

[0016] The beneficial effect of the screw fastening device provided by the present application is that: the screw fastening device provided by the embodiment of the present application, by installing a pick-and-place component on the rotating seat, allows the screw to be fixed and removed from the position where the screw is placed through the pick-and-place component, and moved to the workpiece to lock the workpiece, and the screw is disengaged after the screw is locked, thereby avoiding manually placing the screw on the workpiece, improving the effect of screw placement, and improving the efficiency of screw locking.

[0017] On the other hand, the present application also provides an automatic screw locking device, including a main machine, a screw placement seat, a workpiece and the above-mentioned screw fastening device; the rotating axis of the screw fastening device is installed on the main machine, and the screw placement seat is spaced apart from the workpiece. The main machine is used to drive the screw fastening device to move to the screw placement seat to fix and remove the screw, and the main machine is also used to drive the screw fastening device and the screw to move to the workpiece to lock the screw on the workpiece.

[0018] The beneficial effect of the automatic screw locking device provided by the present application is that the automatic screw locking device provided by the embodiment of the present application can not only realize the removal, locking and removal of screws, but also can accurately position the screws through CNC numerical control design, and drive the corresponding screws to the corresponding screw hole position, so as to avoid the mismatch between the screws and the screw holes and cause the entire workpiece to be scrapped. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following briefly introduces the drawings required for use in the embodiments or descriptions of the prior art. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0020] Figure 1 A three-dimensional schematic diagram of an automatic screw locking device provided in an embodiment of the present application;

[0021] Figure 2 A three-dimensional schematic diagram of a screw fastening device provided in an embodiment of the present application;

[0022] Figure 3 for Figure 2 A schematic axial cross-sectional view of the middle screw fastening device;

[0023] Figure 4 for Figure 2 Exploded diagram of the screw fastening device;

[0024] Figure 5 for Figure 2 A three-dimensional schematic diagram of picking up and placing components;

[0025] Figure 6 for Figure 3 A schematic diagram of the enlarged part of the middle part A;

[0026] Figure 7 for Figure 4 Schematic diagram of the structure of the middle mounting seat;

[0027] Figure 8 for Figure 3 Installation diagram of the central rotating seat, rotating shaft and clutch mechanism;

[0028] Figure 9 for Figure 8 A schematic diagram of the structure of the sleeve in FIG.

[0029] Figure 10 for Figure 8 A schematic diagram of the structure of the seat body;

[0030] Figure 11 for Figure 8 A schematic structural diagram of the first frosted sheet in FIG.

[0031] Figure 12 for Figure 8 Schematic diagram of the structure of the second frosted sheet.

[0032] Among them, the reference numerals in the figures are:

[0033] 1000, screw fastening device; 100, rotating seat; 110, seat body; 111, first clamping block; 112, fourth clamping block; 113, socket; 120, seat cover; 200, rotating shaft; 210, keyway; 300, pick-and-place assembly; 310, mounting seat; 311, inserting portion; 312, stopping portion; 313, mounting portion; 3131, fitting plane; 3132, avoidance groove; 320, spring piece; 321, connecting section; 322, elastic section; 3221, protrusion; 323, fitting section; 330, magnetic element; 340, first screw; 400, elastic element; 500, frosting assembly; 510, first frosting Plate; 511, second clamping block; 520, second frosting plate; 521, third clamping slot; 600, adjustment assembly; 610, sleeve; 611, base plate; 612, first clamping slot; 613, second clamping slot; 614, first positioning hole; 620, pressure cover; 621, abutment ring; 622, mounting ring; 623, fourth clamping slot; 624, second positioning hole; 630, bolt; 640, nut; 650, limiting column; 700, inner drive member; 710, third clamping block; 800, connecting key; 900, centering bearing; 2000, main unit; 3000, screw; 4000, screw placement seat; 5000, workpiece. DETAILED DESCRIPTION

[0034] In order to make the technical problems, technical solutions and beneficial effects to be solved by this application more clearly understood, this application is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain this application and are not intended to limit this application.

[0035] It should be noted that when an element is referred to as being “fixed on” or “disposed on” another element, it may be directly on the other element or indirectly on the other element. When an element is referred to as being “connected to” another element, it may be directly connected to the other element or indirectly connected to the other element.

[0036] It should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on this application.

[0037] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. Throughout the description of this application, "plurality" means two or more, unless otherwise specifically defined.

[0038] See also Figures 1 to 4 The screw fastening device 1000 provided in the embodiment of the present application is now described. The screw fastening device 1000 is used to fix and remove the screw 3000, and to lock the screw 3000 on the workpiece 5000. At the same time, the screw 3000 can also be detached after being locked.

[0039] The screw fastening device 1000 includes a rotating base 100, a rotating shaft 200 and a pick-and-place assembly 300; the rotating base 100 is sleeved on the rotating shaft 200, and the rotating base 100 and the rotating shaft 200 are coaxially arranged. The rotating shaft 200 can be driven by an external driving structure to drive the rotating base 100 to rotate and lift; the pick-and-place assembly 300 is installed on the rotating base 100, and the pick-and-place assembly 300 can move toward the screw 3000 and remove the screw 3000 under the drive of the rotating base 100. The pick-and-place assembly 300 can detach from the screw 3000 after the screw 3000 is tightened.

[0040] In this application, the external driving structure is the main machine of the CNC machine tool; in other embodiments of the present application, the external driving structure is any other driving structure that can drive the rotating shaft 200 to rotate, lift and move horizontally.

[0041] The pick-and-place assembly 300 is mounted on one end of the rotating base 100. One end of the rotating shaft 200 extends outside the other end of the rotating base 100 to connect to an external drive structure. This external drive structure drives the rotating shaft 200 and the rotating base 100 to rotate and rise and fall. Since the pick-and-place assembly 300 is mounted on the rotating base 100, it can rotate and rise and fall with the rotating base 100.

[0042] When locking the screw 3000, the external driving structure is first used to drive the rotating shaft 200 to descend, thereby driving the pick-and-place assembly 300 to descend to the position for placing the screw 3000, and the pick-and-place assembly 300 is used to fix the screw 3000 and remove it to the position of the workpiece 5000; then, the external driving structure is used to drive the rotating shaft 200, the rotating base 100, the pick-and-place assembly 300 and the screw 3000 to rotate and descend, thereby locking the screw 3000 on the workpiece 5000, and finally, the external driving structure is used to drive the pick-and-place assembly 300, the rotating base 100 and the rotating shaft 200 to rise, so that the pick-and-place assembly 300 is separated from the screw 3000.

[0043] The screw fastening device 1000 provided in the embodiment of the present application installs a pick-and-place component 300 on the rotating seat 100, so that the screw 3000 can be fixed and removed from the position where the screw 3000 is placed by the pick-and-place component 300, and moved to the workpiece 5000 to lock the workpiece 5000, and the screw 3000 is detached after the screw 3000 is locked, thereby avoiding manually placing the screw 3000 on the workpiece 5000, improving the effect of placing the screw 3000, and improving the locking efficiency of the screw 3000.

[0044] In one embodiment, the pick-and-place assembly 300 secures the screw 3000 by magnetic attraction and / or elastic snap-fitting. For example, the pick-and-place assembly 300 can secure the screw 3000 to the pick-and-place assembly 300 by magnetic attraction, thereby allowing the screw 3000 to be removed and moved to the location of the workpiece 5000; alternatively, the pick-and-place assembly 300 can secure the screw 3000 to the pick-and-place assembly 300 by elastic snap-fitting, thereby allowing the screw 3000 to be removed and moved to the location of the workpiece 5000; alternatively, the pick-and-place assembly 300 can secure the screw 3000 by both magnetic attraction and elastic snap-fitting, thereby achieving dual fixation of the screw 3000 and preventing the screw 3000 from falling off when being moved.

[0045] For details, please refer to Figures 4 to 7 The pick-and-place assembly 300 includes a mounting base 310, a spring clip 320 and a magnetic component 330; the mounting base 310 is mounted on the rotating base 100; the spring clip 320 is mounted on the mounting base 310, and the spring clip 320 has at least two protrusions 3221 exposed from the mounting base 310, and at least two protrusions 3221 are used to elastically press against the hexagonal hole (not shown) of the screw 3000; the magnetic component 330 is mounted on the rotating base 100 and is used to adsorb and fix the screw 3000.

[0046] It should be noted that the hexagonal hole of the screw 3000 refers to a hole opened on the nut of the screw 3000, which is used to cooperate with a screwdriver. In this application, it can also be used to abut and cooperate with the spring 320. When the pick-and-place component 300 approaches the screw 3000, the external driving structure first drives the rotating base 100 and the mounting base 310 to descend, and the screw fastening device 1000 rotates counterclockwise at a low speed for one circle. When the pick-and-place component 300 is aligned with the hexagonal hole of the screw 3000, the rotating base 100 drives the pick-and-place component 300 to slide into the hexagonal hole on the top of the screw 3000, so that at least two protrusions 3221 of the spring piece 320 elastically abut against the inner wall of the hexagonal hole of the screw 3000, thereby making the spring piece 320 and the screw 3000 clamped and fixed; at this time, the magnetic attraction part 330 installed on the rotating base 100 is close to the screw 3000, so that it can adsorb the screw 3000, ensuring that the screw 3000 is firmly taken away and transferred by the pick-and-place component 300.

[0047] Please refer to Figures 5 to 7 , the mounting base 310 includes an insertion portion 311, a stop portion 312, and a mounting portion 313 that are connected in sequence. A jack 113 is provided at the center of one end of the rotating base 100, and the insertion portion 311 is inserted into the jack 113; the stop portion 312 is stopped and fitted against the outer side wall of one end of the rotating base 100. The outer diameter of the stop portion 312 is greater than the outer diameter of the insertion portion 311. A plurality of first mounting holes are distributed at positions where the stop portion 312 protrudes around the insertion portion 311. A plurality of second mounting holes are distributed at one end of the rotating base 100. The first screw 340 sequentially passes through the first mounting hole and the second mounting hole to lock the stop portion 312 to one end of the rotating base 100. The elastic piece 320 is mounted on the mounting portion 313, and the magnetic member 330 is sleeved on the mounting portion 313.

[0048] Please refer to Figure 4 and Figure 6 , the elastic piece 320 is in a "Z" shape. The elastic piece 320 includes a connecting section 321, two elastic sections 322, and two fitting sections 323; the two elastic sections 322 are respectively connected to opposite ends of the connecting section 321. The elastic section 322 is bent and connected to the connecting section 321, and a protrusion 3221 is provided on each elastic section 322; the two fitting sections 323 are respectively connected to one ends of the two elastic sections 322 far from the connecting section 321. The fitting section 323 is bent and connected to the elastic section 322, and the fitting section 323 extends from the elastic section 322 in a direction away from the other elastic section 322. Correspondingly, the mounting portion 313 has an outer end face facing away from the stop portion 312. The surface of the mounting portion 313 connected to the stop portion 312 is a stepped surface. The mounting portion 313 has two opposite fitting planes 3131, and the two fitting planes 3131 are respectively connected to the outer end face. During installation, the two elastic sections 322 are respectively fitted on the two fitting planes 3131, the connecting section 321 is stopped on the outer end face, the two fitting sections 323 are respectively pasted on the stepped surface, the magnetic member 330 is sleeved on the mounting portion 313 and sleeved on the two elastic sections 322, and the two fitting sections 323 respectively abut against one end of the magnetic member 330 and the stepped surface. In addition, an avoidance groove 3132 is provided at a position corresponding to the protrusion 3221 of the elastic section 322 on the mounting portion 313. The avoidance groove 3132 is connected to the fitting plane 3131, so that the elastic section 322 has a moving space corresponding to the position of the protrusion 3221, to ensure the elasticity of the elastic section 322 corresponding to the protrusion 3221 portion, and further enable the protrusion 3221 to elastically abut against the inner wall of the hexagonal hole of the screw 3000.

[0049] Optionally, at least two protrusions 3221 are distributed on each elastic section 322 to improve the clamping force between the elastic piece 320 and the screw 3000.

[0050] In addition, in the present application, the spring 320 includes two elastic segments 322, each of which is provided with a protrusion 3221. It is understandable that in other embodiments of the present application, the number of the elastic segments 322 can also be three or more, and each elastic segment 322 is provided with a protrusion 3221.

[0051] In one embodiment, see Figures 3 to 5 The screw fastening device 1000 also includes an elastic member 400; a circumferential limit is formed between the rotating shaft 200 and the rotating seat 100, and the rotating shaft 200 is axially slidably arranged in the rotating seat 100; the opposite ends of the elastic member 400 are respectively abutted between the rotating seat 100 and the rotating shaft 200 along the axial direction of the rotating shaft 200.

[0052] For details, please refer to Figure 1 When the screw 3000 is set on the screw placement seat 4000 or locked on the workpiece 5000, the screw 3000 needs to be removed. First, the external driving structure drives the rotating seat 100 and the pick-and-place component 300 to move downward until the spring piece 320 of the pick-and-place component 300 is clamped with the hexagonal hole of the screw 3000, and the magnetic sleeve 610 absorbs the screw 3000; the external driving structure drives the rotating shaft 200 to rotate. Due to the circumferential limit formed between the rotating shaft 200 and the rotating seat 100, the rotating seat 100 can rotate with the rotating shaft 200, thereby driving the driving mechanism. The moving assembly drives the screw 3000 to rotate, and the screw 3000 moves upward after rotating. The upward movement of the screw 3000 drives the rotating base 100 to move upward via the pick-and-place assembly 300. Since the rotating base 100 and the rotating shaft 200 are abutted against the elastic member 400, even if the rotating base 100 moves upward, it will not drive the rotating shaft 200 to move upward, thereby preventing the screw 3000 from moving upward to cause pressure to push the rotating shaft 200, causing the rotating shaft 200 to generate a downward reaction force on the screw 3000, preventing the screw 3000 from moving upward, thereby affecting the disassembly and placement of the screw 3000.

[0053] When the external driving structure transfers the screw 3000 to the top facing the workpiece 5000 through the rotating seat 100, the external driving structure drives the rotating seat 100 and the screw 3000 to move downward until the screw 3000 contacts the screw hole of the workpiece 5000. The screw 3000 stops moving due to resistance, and the external driving structure continues to drive the rotating shaft 200 to move downward, but the rotating seat 100 cannot move downward due to the resistance of the screw 3000, and the elastic member 400 is compressed. When the elastic member 400 is compressed to a preset value; the rotating shaft 200 is driven to rotate by the external driving structure, thereby driving the rotating seat 100 and the screw 3000 to rotate. During the rotation of the screw 3000, due to the elastic pressure of the elastic member 400, the screw 3000 can move downward while rotating, so that the screw 3000 can be locked on the workpiece 5000.

[0054] Optionally, the elastic member 400 is a compression spring, and compression of the compression spring enables axial sliding between the rotating shaft 200 and the rotating base 100, thereby enabling the screwing out and screwing in of the screw 3000. It is understood that in other embodiments of the present application, the elastic member 400 may also be a spring sheet or a spring pin, etc., and this is not intended to be the only limitation.

[0055] In one embodiment, the screw fastening device 1000 also includes a clutch mechanism, which is connected between the rotating shaft 200 and the rotating seat 100. The clutch mechanism is used to unlock the circumferential limit between the rotating shaft 200 and the rotating seat 100 after the screw 3000 is tightened, that is, to enable relative rotation between the rotating shaft 200 and the rotating seat 100.

[0056] Specifically, when the external driving structure drives the rotating shaft 200 to rotate to drive the rotating seat 100 and the screw 3000 to rotate, the screw 3000 is rotated and locked into the workpiece 5000. When the screw 3000 is tightened, the clutch mechanism unlocks the circumferential limit between the rotating shaft 200 and the rotating seat 100, so that relative rotation can be generated between the rotating shaft 200 and the rotating seat 100. When the external driving structure continues to drive the rotating shaft 200 to rotate, the rotating seat 100 does not rotate, thereby preventing the screw 3000 from being tightened too much and improving the tightening quality of the screw 3000. At the same time, the clutch mechanism can be set to achieve standardization of the tightening force of the screw 3000 and improve the overall quality of the tightening of the screw 3000 on the workpiece 5000.

[0057] In one embodiment, see Figure 3 、 Figure 4 and Figure 8 The clutch mechanism includes a grinding assembly 500 and an adjustment assembly 600; the grinding assembly 500 is sleeved between the rotating shaft 200 and the rotating seat 100, and the grinding assembly 500 includes a plurality of first grinding sheets 510 and a plurality of second grinding sheets 520 that are sequentially stacked and spaced along the axial direction; a circumferential limit is formed between each first grinding sheet 510 and the rotating seat 100, and a circumferential limit is formed between each second grinding sheet 520 and the rotating shaft 200; the adjustment assembly 600 is used to adjust the preset friction force between the first grinding sheet 510 and the second grinding sheet 520.

[0058] The sanding assembly 500 includes a plurality of first sanding sheets 510 and a plurality of second sanding sheets 520 that are sequentially spaced and stacked along the axial direction. Specifically, the plurality of first sanding sheets 510 are sequentially spaced and stacked along the axial direction, and the plurality of second sanding sheets 520 are sequentially spaced and stacked along the axial direction. A second sanding sheet 520 is provided between every two first sanding sheets 510, and a first sanding sheet 510 is provided between every two second sanding sheets 520. The first sanding sheets 510 and the second sanding sheets 520 are stacked, so friction exists between the first sanding sheets 510 and the second sanding sheets 520. The greater the pressure between the first sanding sheets 510 and the second sanding sheets 520, the greater the friction between them. The smaller the pressure between the first sanding sheets 510 and the second sanding sheets 520, the smaller the friction between them.

[0059] Secondly, the preset friction force between the first and second sanding plates 510, 520 can be adjusted by adjusting the adjustment assembly 600. This preset friction force is set based on the driving force of the external drive structure after the screw 3000 is tightened. When the screw 3000 is tightened, the rotational driving force of the external drive structure is greater than the preset friction force, causing the first and second sanding plates 510, 520 to slide relative to each other. A rotational stop is formed between the second sanding plate 520 and the rotating shaft 200, thereby enabling the second sanding plate 520 to rotate when the rotating shaft 200 rotates. The first and second sanding plates 510, 520 can slide relative to each other. Therefore, when the second sanding plate 520 rotates, the first sanding plate 510 can stop rotating, and the rotating base 100 also stops rotating along with the first sanding plate 510. This prevents the rotating shaft 200 from continuing to rotate after the screw 3000 is tightened, which could result in overtightening of the screw 3000, such as thread stripping or cracked threads.

[0060] In addition, the preset friction force between the first grinding sheet 510 and the second grinding sheet 520 can be limited, so that the tightening force of the screw 3000 can be standardized, thereby improving the overall tightening quality of the screw 3000 on the workpiece 5000.

[0061] It is understandable that in other embodiments of the present application, according to actual design conditions and specific requirements, the above-mentioned clutch mechanism can also be of other types of structures. For example, the clutch mechanism includes an inner grinding cylinder and an outer grinding cylinder, wherein the inner grinding cylinder forms a circumferential limit with the rotating shaft 200, and the outer grinding cylinder forms a circumferential limit with the rotating seat 100; when the rotational driving force of the external driving structure is greater than the friction between the inner grinding cylinder and the outer grinding cylinder, relative rotation occurs between the inner grinding cylinder and the outer grinding cylinder, so that the rotating shaft 200 does not drive the rotating seat 100 to rotate. In addition, the above-mentioned clutch mechanism can also include an inner sleeve and an outer sleeve, wherein the inner sleeve forms a circumferential limit with the rotating shaft, and the outer sleeve forms a circumferential limit with the rotating seat 100, and the inner sleeve and the outer sleeve are locked and limited by a protrusion and a groove; when the rotational driving force of the external driving structure is greater than the locking force between the inner sleeve and the outer sleeve, relative rotation occurs between the inner sleeve and the outer sleeve, so that the rotating shaft 200 does not drive the rotating seat 100 to rotate.

[0062] In one embodiment, see Figure 3 、 Figure 4 and Figure 8 The adjusting assembly 600 includes a sleeve 610, a pressure cover 620, a bolt 630 and a nut 640; the sleeve 610 is sleeved between the rotating seat 100 and the grinding assembly 500, and a circumferential limit is formed between the outer peripheral wall of the sleeve 610 and the rotating seat 100, and a circumferential limit is formed between the inner peripheral wall of the sleeve 610 and the first grinding sheet 510; an axial end of the sleeve 610 has a bottom plate 611, each first grinding sheet 510 and each second grinding sheet 510 are The sanding sheets 520 are stacked in sequence on the base plate 611, the pressure cover 620 is located at the other axial end of the sleeve 610 and abuts against the first sanding sheet 510 or the second sanding sheet 520; the bolts 630 are respectively passed through the pressure cover 620 and the sleeve 610, and the nut 640 is sleeved on the bolt 630 and abuts against the sleeve 610. The preset friction force between the first sanding sheet 510 and the second sanding sheet 520 is adjusted by rotating the nut 640.

[0063] The number of the first frosting sheets 510 and the second frosting sheets 520 is not limited. One first frosting sheet 510 may be attached to the bottom plate 611 first, or one second frosting sheet 520 may be attached to the bottom plate 611 first. Similarly, the uppermost end (i.e., the other axial end of the sleeve 610) may be the first frosting sheet 510 or the second frosting sheet 520. When the first frosting sheet 510 is at the uppermost end, the pressure cover 620 abuts against the first frosting sheet 510. When the second frosting sheet 520 is at the uppermost end, the pressure cover 620 abuts against the second frosting sheet 520. This application is described by taking the second frosting sheet 520 at the lowermost end and the first frosting sheet 510 at the uppermost end as an example.

[0064] In the present application, since the base plate 611 is part of the sleeve 610, it is equivalent to the frosting assembly 500 being in contact between the sleeve 610 and the pressure cover 620. By adjusting the position of the nut 640 on the bolt 630, the pressure of the pressure cover 620 on the frosting assembly 500 can be adjusted, that is, the pressure between the adjacent first frosting sheet 510 and the second frosting sheet 520 can be adjusted, and then the preset friction force between the first frosting sheet 510 and the second frosting sheet 520 can be adjusted.

[0065] Further, see Figure 8 The gland 620 includes an interconnected abutment ring 621 and a mounting ring 622. The inner diameter of the abutment ring 621 is the same as that of the mounting ring 622, while the outer diameter of the abutment ring 621 is smaller than that of the mounting ring 622. The abutment ring 621 is positioned opposite the sanding assembly 500, while the mounting ring 622 corresponds to the sleeve 610. During installation, the end of the abutment ring 621 facing away from the mounting ring 622 abuts against the first sanding sheet 510 or the second sanding sheet 520, and the bolt 630 is mounted on the mounting ring 622. Specifically, a threaded hole is formed at the other axial end of the sleeve 610. The mounting ring 622 is spaced axially from the sleeve 610. A bolt 630 passes through the mounting ring 622 and is inserted into the threaded hole. A nut 640 is sleeved on the bolt 630 and abuts the other axial end of the sleeve 610. By rotating the nut 640, the insertion depth of the bolt 630 into the sleeve 610 can be adjusted, thereby adjusting the extrusion force between the gland 620 and the sleeve 610, and further adjusting the pressure between the first and second sanding sheets 510 and 520. In addition, the outer wall of the mounting ring 622 forms a circumferential limit with the inner wall of the rotating base 100. The mounting ring 622 is axially slidably disposed on the rotating base 100, so that when the nut 640 is adjusted, the mounting ring 622 can slide axially along the rotating base 100.

[0066] In one embodiment, see Figure 8 and Figure 10The adjustment assembly 600 includes a plurality of bolts 630 and a plurality of nuts 640. The plurality of bolts 630 are distributed circumferentially between the sleeve 610 and the pressure cover 620, and a nut 640 is installed on each bolt 630; the adjustment assembly 600 also includes a plurality of limiting columns 650. The sleeve 610 is provided with a plurality of first positioning holes 614 distributed circumferentially, and the pressure cover 620 is provided with a plurality of second positioning holes 624 distributed circumferentially. The plurality of first positioning holes 614 and the plurality of second positioning holes 624 are arranged in a one-to-one correspondence along the circumference of the sleeve 610; one end of each limiting column 650 is inserted into a first positioning hole 614, and the other end of each limiting column 650 is inserted into a second positioning hole 624. In this embodiment, since the first sanding sheet 510, the second sanding sheet 520, and the sleeve 610 are all circular structures, multiple bolts 630 and multiple nuts 640 are required to uniformly adjust the friction force between the first sanding sheet 510 and the second sanding sheet 520. However, since the nuts 640 are manually adjusted, it is difficult to ensure that the adjustment position of each nut 640 is the same. To address this issue, the present application provides multiple circumferentially distributed limiting posts 650, with the two ends of each limiting post 650 inserted into corresponding positions of the sleeve 610 and the gland 620, respectively. In other words, the multiple limiting posts 650 can ensure that the position of the gland 620 is evenly adjusted along the circumference, thereby ensuring that the adjustment force of the adjustment assembly 600 is uniform along the circumference.

[0067] See also Figures 8 to 10 The rotating seat 100 includes a seat body 110 and a seat cover 120 . The seat body 110 is cylindrical and has a bottom. The seat cover 120 is fixedly disposed on the top of the seat body 110 . A plurality of first clamping blocks 111 are protruding from the inner wall of the base body 110, and the first clamping blocks 111 extend along the axial direction of the base body 110, and the plurality of first clamping blocks 111 are arranged in sequence at intervals along the circumference of the base body 110; a plurality of first clamping grooves 612 are formed on the outer wall of the sleeve 610, and the first clamping grooves 612 extend along the axial direction of the sleeve 610, and the plurality of first clamping grooves 612 are arranged in sequence at intervals along the circumference of the sleeve 610, and the plurality of first clamping blocks 111 are slidably plugged into the plurality of first clamping grooves 612 in a one-to-one correspondence, and the elastic member 400 abuts between the bottom of the base body 110 and the sleeve 610, thereby not only forming a circumferential limit between the sleeve 610 and the rotating base 100, but also enabling the sleeve 610 to be slidably arranged in the rotating base 100 along the axial direction of the rotating base 100.

[0068] See also Figure 10 and Figure 11The inner wall of the sleeve 610 is provided with a plurality of second slots 613 extending axially along the sleeve 610 and spaced apart circumferentially. Each first sanding sheet 510 is provided with a plurality of second clamping blocks 511 on its outer wall, spaced apart circumferentially along the first sanding sheet 510 and spaced apart axially along the first sanding sheet 510. The second clamping blocks 511 on each first sanding sheet 510 can slide in the plurality of second slots 613 in a one-to-one correspondence, thereby achieving circumferential positioning between the sleeve 610 and the plurality of first sanding sheets 510. To prevent the second sanding sheets 520 from interfering with the connection between the first sanding sheets 510 and the sleeve 610, the outer diameter of the second sanding sheets 520 is set to be the same as the minimum outer diameter of the first sanding sheets 510.

[0069] In one embodiment, see Figure 4 and Figure 8 The screw fastening device 1000 further includes an inner driver 700, which is fixedly mounted on the rotating shaft 200 and forms a circumferential limit with the second sanding sheet 520. The provision of the inner driver 700 in this embodiment eliminates the need for the second sanding sheet 520 to be directly connected to the rotating shaft 200. This avoids the need for a circumferential limit between the second sanding sheet 520 and the rotating shaft 200. Furthermore, the inner driver 700 protects the rotating shaft 200, thereby increasing its service life.

[0070] Specifically, a key slot 210 is provided on the rotating shaft 200 , and the inner driving member 700 is installed on the rotating shaft 200 via a connecting key 800 .

[0071] See also Figure 12 A plurality of third slots 521 are formed on the inner wall of each second frosting sheet 520. The plurality of third slots 521 are sequentially spaced along the circumference of the second frosting sheet 520. The third slots 521 penetrate the second frosting sheet 520 in the axial direction. Figure 4 A third clamping block 710 is protruding from the outer wall of the inner driving member 700. The third clamping block 710 extends axially along the inner driving member 700. A plurality of third clamping blocks 710 are sequentially spaced apart along the circumference of the inner driving member 700. During installation, the plurality of third clamping blocks 710 engage with the plurality of third clamping grooves 521 in a one-to-one correspondence, thereby forming a circumferential limit between the inner driving member 700 and the second grinding sheet 520.

[0072] See also Figure 9 , the other axial end of the seat body 110 is provided with a plurality of fourth clamping blocks 112 axially protruding, and the plurality of fourth clamping blocks 112 are sequentially spaced along the circumferential direction; Figure 4The outer wall of the mounting ring 622 is recessed with a plurality of fourth slots 623 , and the plurality of fourth slots 623 are slidably connected with the plurality of fourth blocks 112 in a one-to-one correspondence.

[0073] In one embodiment, see Figure 9 The screw fastening device 1000 also includes two centering bearings 900, one of which is mounted on the gland 620 and sleeved on the rotating shaft 200, and the other is mounted on the base plate 611 of the sleeve 610 and sleeved on the rotating shaft 200. The two centering bearings 900 allow the adjustment assembly 600 to rotate coaxially with the rotating shaft 200 without deviation, while also preventing wear on the rotating shaft 200 and thereby increasing its service life.

[0074] Specifically, a first receiving groove is provided at the center of one end of the mounting ring 622 of the pressure cover 620 away from the abutting ring 621, and the centering bearing 900 installed on the pressure cover 620 is accommodated in the first receiving groove; a second receiving groove is provided on the outer side of the bottom of the base plate 611, and the centering bearing 900 installed on the base plate 611 is accommodated in the second receiving groove.

[0075] On the other hand, see Figure 1 The present application also provides an automatic screw locking device, including a main body 2000, a screw placement seat 4000, a workpiece 5000 and the above-mentioned screw fastening device 1000; the rotating shaft 200 of the screw fastening device 1000 is installed on the main body 2000, the screw placement seat 4000 and the workpiece 5000 are arranged at an interval, the main body 2000 is used to drive the screw fastening device 1000 to move to the screw placement seat 4000 to fix and remove the screw 3000, and the main body 2000 is also used to drive the screw fastening device 1000 and the screw 3000 to move to the workpiece 5000 to lock the screw 3000 on the workpiece 5000.

[0076] The host 2000 can not only output rotational motion and lifting motion, but also output horizontal movement motion, thereby being able to move the screw 3000 from the screw placement seat 4000 to the workpiece 5000, or from the workpiece 5000 to the screw placement seat 4000.

[0077] The automatic screw locking equipment of the present application can not only realize the placement, locking and removal of the screw 3000, but also can accurately position the screw 3000 through CNC numerical control design, and drive the corresponding screw 3000 to the corresponding screw hole position, so as to avoid the mismatch between the screw 3000 and the screw hole, which will cause the entire workpiece 5000 to be scrapped.

[0078] The above description is only a preferred embodiment of the present application and is not intended to limit the present application. Any modifications, equivalent replacements and improvements made within the spirit and principles of the present application should be included in the scope of protection of the present application.

Claims

1. A screw fastening device, characterized in that: The invention comprises a rotating seat, a rotating shaft and a pick-and-place assembly; the rotating seat is sleeved outside the rotating shaft, the rotating seat and the rotating shaft are coaxially arranged, and the rotating shaft can be driven by an external driving structure to drive the rotating seat to rotate and lift; the pick-and-place assembly is installed on the rotating seat, and the pick-and-place assembly can move toward the screw to fix and remove the screw under the drive of the rotating seat, and the pick-and-place assembly can detach from the screw after the screw is locked on the workpiece; The screw fastening device further includes a clutch mechanism; The clutch mechanism includes a grinding assembly and an adjustment assembly; the grinding assembly is sleeved between the rotating shaft and the rotating seat, and includes a plurality of first grinding sheets and a plurality of second grinding sheets that are sequentially spaced and stacked along the axial direction; a circumferential limit is formed between each of the first grinding sheets and the rotating seat, and a circumferential limit is formed between each of the second grinding sheets and the rotating shaft; the adjustment assembly is used to adjust the preset friction force between the first grinding sheets and the second grinding sheets; wherein, a second grinding sheet is provided between every two of the first grinding sheets, and a first grinding sheet is provided between every two of the second grinding sheets; The adjusting assembly includes a sleeve, a pressure cover, a bolt and a nut; the sleeve is sleeved between the rotating seat and the grinding assembly, a circumferential limit is formed between the outer circumferential wall of the sleeve and the rotating seat, and a circumferential limit is formed between the inner circumferential wall of the sleeve and the first grinding sheet; one axial end of the sleeve has a base plate, each first grinding sheet and each second grinding sheet are stacked on the base plate in sequence, the pressure cover is located at the other axial end of the sleeve and abuts against the first grinding sheet or the second grinding sheet; the bolts are respectively passed through the pressure cover and the sleeve, and the nut is sleeved on the bolt and abuts against the sleeve; the preset friction force between the first grinding sheet and the second grinding sheet is adjusted by rotating the nut; The pick-and-place assembly fixes the screw by magnetic adsorption and / or elastic clamping; The pick-and-place assembly includes: A mounting seat, the mounting seat being mounted on the rotating seat; a spring piece, the spring piece being mounted on the mounting seat, the spring piece having at least two protrusions exposed from the mounting seat, the at least two protrusions being used to elastically press against the hexagonal holes of the screw; A magnetic component is installed on the rotating seat and is used to absorb and fix the screw.

2. The screw fastening device according to claim 1, wherein: The screw fastening device also includes an elastic member; a circumferential limit is formed between the rotating shaft and the rotating seat, and the rotating shaft is axially slidably arranged in the rotating seat; the opposite ends of the elastic member are respectively abutted between the rotating seat and the rotating shaft along the axial direction of the rotating shaft.

3. The screw fastening device according to claim 1 or 2, characterized in that: The clutch mechanism is connected between the rotating shaft and the rotating seat, and is used to unlock the circumferential limit between the rotating shaft and the rotating seat after the screw is tightened.

4. The screw fastening device according to claim 1, wherein: The pressure cover includes an abutment ring and a mounting ring connected to each other; the outer diameter of the abutment ring is smaller than the outer diameter of the mounting ring; the end of the abutment ring facing away from the mounting ring abuts on the first frosting sheet or the second frosting sheet, and the bolt is installed on the mounting ring; the outer wall of the mounting ring and the inner wall of the rotating seat form a circumferential limit, and the mounting ring is axially slidable on the rotating seat.

5. The screw fastening device according to claim 1, wherein: The adjusting assembly includes a plurality of bolts and a plurality of nuts, wherein the plurality of bolts are distributed circumferentially between the sleeve and the pressure cover, and a nut is installed on each of the bolts; the adjusting assembly also includes a plurality of limiting columns, a plurality of first positioning holes are distributed circumferentially on the sleeve, and a plurality of second positioning holes are distributed circumferentially on the pressure cover, and the plurality of first positioning holes and the plurality of second positioning holes are arranged in a one-to-one correspondence along the circumference of the sleeve; one end of each of the limiting columns is inserted into a first positioning hole, and the other end of each of the limiting columns is inserted into a second positioning hole.

6. An automatic screw locking device, characterized in that: It comprises a main machine, a screw placement seat, a workpiece and a screw fastening device as described in any one of claims 1 to 5; the rotating shaft of the screw fastening device is installed on the main machine, the screw placement seat is spaced apart from the workpiece, the main machine is used to drive the screw fastening device to move to the screw placement seat to fix and remove the screw, and the main machine is also used to drive the screw fastening device and the screw to move to the workpiece to lock the screw on the workpiece.

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