Fastener tightening system

Abstract

The utility model discloses a fastening piece tightening system which comprises a clamping structure, a clamping releasing structure and a feeding device. The clamping structure is used for clamping a fastener; the clamping releasing structure is used for releasing clamping of the clamping structure on the fastener; and the feeding device is used for conveying the fasteners into the clamping structure. According to the fastening piece tightening system, automatic feeding, clamping and auxiliary positioning in the fastening piece installation process are achieved, manual handheld positioning of the fastening piece is replaced, other tool clamps are not needed, time and manpower consumption needed in the fastening piece installation process is greatly reduced, and the production and manufacturing cost is greatly reduced.

Description

Technical Field

[0001] The utility model belongs to the field of tightening systems, and specifically relates to a fastener tightening system. Background Art

[0002] In a wide range of modern industrial manufacturing and daily life, the connection of fasteners (such as bolts), as a widely used mechanical connection method, plays a crucial role in constructing and fixing the connections between various structural components.

[0003] As a basic mechanical connection method, the connection of fasteners has the advantages of simple structure, reliable connection, easy disassembly and replacement, etc., and is therefore widely used in many industries such as automobile manufacturing, machinery manufacturing, building installation, and electronic equipment assembly. Tightening systems (such as hand-held power tools), as an important type of power tool, are frequently used to assist in installing various fasteners to construct and stabilize the connections between different structural components.

[0004] However, in the process of production and use, when using tightening systems to install various fasteners, there are a series of significant problems. The positioning and feeding of fasteners itself is a complex and cumbersome process, which has a significant impact on the overall production efficiency and cost. First of all, the positioning of fasteners is a key step to ensure the accuracy and stability of the connection. Due to the diversity and complexity of different structural components, special tooling fixtures are often required on some structural surfaces to pre-position the fastener positions. The design, manufacturing, and adjustment of these tooling fixtures not only increase the production cost but also extend the production preparation time. At the same time, the use of tooling fixtures also requires operators to have certain professional skills to ensure that the fasteners can be accurately placed in the predetermined positions. Secondly, the feeding process of fasteners is also cumbersome. Before pre-positioning, operators need to manually select the corresponding type of fasteners from the fastener library and place them one by one in the holes of the tooling fixtures or the parts to be connected. There are not only risks of errors caused by human factors, such as mismatching of fastener models and inaccurate placement positions, but also a large amount of human and material resources are consumed. Especially in a large-scale production environment, the time cost brought by manual feeding is particularly significant, seriously restricting the improvement of production efficiency and production capacity. In addition, in order to ensure the smooth installation of fasteners, operators also need to adjust the hand drill after pre-positioning to match the specifications and installation requirements of the fasteners, which also consumes a large amount of time and energy and is easily affected by the skill level and experience of the operators.

[0005] In summary, there are many problems in the repositioning and feeding processes of installing fasteners with existing tightening systems, which not only increase the production cost and cycle but also reduce the production efficiency and product quality. Therefore, a fastener positioning device and a tightening system are proposed to overcome the deficiencies of the existing technology and improve the production efficiency. Summary of the Utility Model

[0006] The purpose of the present utility model is to provide a fastener tightening system for the above-mentioned deficiencies, which realizes automatic feeding, clamping and auxiliary positioning during the installation of fasteners. It not only greatly reduces the time and labor consumption required during the fastener installation process, but also significantly reduces the manufacturing cost. To achieve the above purpose, the present utility model provides the following technical solutions:

[0007] A fastener tightening system includes a tightening tool and a fastener positioning device. The fastener positioning device is attached to the non-rotating part of the tightening tool and surrounds the rotating part of the tightening tool;

[0008] The fastener positioning device includes a clamping structure and a clamping release structure;

[0009] The clamping structure includes a plurality of clamping components distributed in the circumferential direction of the tightening tool. The clamping components can movably and pivotally clamp the fastener;

[0010] The clamping release structure includes a plurality of clamping release components distributed in the circumferential direction of the tightening tool. The clamping release components can movably and pivotally release the clamping of the fastener by the clamping structure.

[0011] Furthermore, the clamping structure further includes a fixing ring. The fastener positioning device is attached to the non-rotating part of the tightening tool through the fixing ring; the clamping components are movably and pivotally connected to the bottom of the fixing ring; the clamping components include a first clamping piece and a second clamping piece; one end of the first clamping piece is movably and pivotally connected to the bottom of the fixing ring, and the other end is movably and pivotally connected to one end of the second clamping piece, so that the clamping end of the second clamping piece can close and clamp the fastener.

[0012] Furthermore, the clamping release structure further includes a positioning ring; the clamping release components are movably and pivotally connected to the fixing ring and are arranged in the circumferential direction of the fixing ring; the clamping release components and the clamping components are arranged alternately; the clamping release components include a first clamping release piece and a second clamping release piece; one end of the first clamping release piece is movably and pivotally connected to the fixing ring, and the other end is movably and pivotally connected to one end of the second clamping release piece; the other end of the second clamping release piece is movably and pivotally connected to the positioning ring, so that the clamping release components limit the movement of the positioning ring in the direction of approaching or departing from the fixing ring.

[0013] Further, an elastic member is disposed outside the second clamping release member; the elastic member provides a driving force for resetting the clamping release assembly; the elastic member is an elastic rubber ring extending circumferentially along the outside of the second clamping release member; an elastic force transmission rod is provided between the elastic member and the second clamping member; the elastic force transmission rod drives the clamping assembly to reset when the clamping release assembly resets.

[0014] Further, a feeding device is further included; the feeding device includes a feeding structure and a feeding control structure;

[0015] The feeding structure includes a feeding part for storing and releasing the fasteners one by one;

[0016] and a fastener conveying part for conveying the fasteners to the clamping assembly in the form of a slide rail; the feeding control structure is used to control the number of fasteners entering the clamping assembly and the conveying speed in the feeding structure.

[0017] Further, the feeding structure includes a feeding part and a fastener conveying part; the feeding part is connected to the fixing ring through a first fixing connection member; a feeding support is provided on the first fixing connection member; the bottom end of the feeding support is connected to the fastener conveying part; the fastener conveying part is located below the outlet of the feeding part.

[0018] Further, a sliding mechanism is provided at the upper end of the feeding support; the sliding mechanism includes a sliding support, a guiding groove, a guiding rod and a locking member; the top end of the sliding support is connected to the first fixing connection member; a guiding groove is provided on the side surface of the sliding support; a guiding rod is provided on the feeding support; the guiding rod is connected in cooperation with the guiding groove to enable the feeding support to slide up and down along the guiding groove; a locking member is provided between the feeding support and the sliding support to relatively lock the positions of the feeding support and the sliding support.

[0019] Further, the feeding support includes a first support, a second support and a third support; the top end of the first support is slidably connected to the sliding support, and the bottom end is vertically connected to the second support; a slide rail adjusting member is provided on one side of the second support, and a slide rail connecting member is provided on the other side; one end of the slide rail adjusting member is inserted into the second support and is in interference fit with the second support, and the other end is connected to the slide rail of the fastener conveying part; a detachable third support is further provided at the bottom end of the first support; the slide rail of the fastener conveying part is provided at the bottom end of the third support.

[0020] Further, the feeding control structure includes a rotating picking part; the rotating picking part is a flexible brush, and has multiple rows of bristles arranged at radial intervals around the rotating shaft.

[0021] Furthermore, the feeding control structure also includes a rotating component; the rotating component is connected to the fixed ring through a second fixed connecting member; the rotating component includes a ratchet toggle member and a one-way ratchet; the ratchet toggle member is provided with a pawl stop tooth; the pawl stop tooth is meshed with the gear teeth of the one-way ratchet; the pawl stop tooth is provided with a rotating shaft at the bottom of the one-way ratchet; the rotating shaft is connected to a rotating pickup part.

[0022] The beneficial effects of the utility model are:

[0023] The utility model discloses a fastener tightening system, including a clamping structure, a clamping release structure and a feeding device; the clamping structure is used to clamp the fastener; the clamping release structure is used to release the clamping structure from the fastener; the feeding device is used to feed the fastener into the clamping structure. The utility model discloses a fastener tightening system, which realizes automatic feeding, clamping and auxiliary positioning in the process of installing fasteners, replaces manual hand-held positioning of fasteners, and does not require other tooling fixtures, which not only greatly reduces the time and manpower consumption required in the process of fastener installation, but also greatly reduces the production cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a three-dimensional structural schematic diagram of the fastener tightening system of the utility model, omitting the tightening tool;

[0025] Figure 2 It is a three-dimensional structural schematic diagram of the fastener positioning device of the utility model;

[0026] Figure 3 It is a three-dimensional structural schematic diagram of the clamping assembly of the utility model;

[0027] Figure 4 It is a three-dimensional structural schematic diagram of the clamping release assembly of the utility model;

[0028] Figure 5 It is a three-dimensional structural schematic diagram of the feeding structure of the utility model;

[0029] Figure 6 It is a three-dimensional structural schematic diagram of the feeding bracket of the utility model;

[0030] Figure 7 It is a three-dimensional structural schematic diagram of the feeding control structure of the utility model;

[0031] Figure 8 It is a three-dimensional structural schematic diagram of the rotating assembly of the utility model;

[0032] Figure 9 It is a three-dimensional structural schematic diagram of the fastener tightening system of the utility model;

[0033] In the accompanying drawings: 1-clamping structure, 2-feeding device, 3-clamping release structure, 4-fixing ring, 5-feeding structure, 6-feeding control structure, 7-clamping release assembly, 8-first clamping release member, 9-second clamping release member, 10-positioning ring, 11-clamping assembly, 12-first clamping member, 13-second clamping member, 14-elastic component, 15-elastic force transmission rod, 16-feeding part, 17-fastener transmission part, 18-feeding bracket, 19-first fixed connecting member , 20-sliding bracket, 21-guide groove, 22-guide rod, 23-locking piece, 24-slide rail adjusting piece, 25-rotating piece removal part, 26-rotating shaft, 27-rotating assembly, 28-second fixed connecting piece, 29-ratchet toggle piece, 30-one-way ratchet, 31-pawl stop tooth, 32-tightening tool, 33-fastener, 34-hook-shaped connecting part, 35-slide rail connecting piece, 36-first bracket, 37-second bracket, 38-third bracket, 39-through hole. DETAILED DESCRIPTION

[0034] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific implementation methods, but the present invention is not limited to the following embodiments.

[0035] The utility model provides a tightening system for a fastener, which can comprise a fastener positioning device and a feeding device.

[0036] Embodiment 1:

[0037] See attached Figures 1 - 4 . Figure 1 The specific structure of the fastener tightening system of the utility model (tightening tools omitted) is shown, which includes a clamping structure 1, a clamping release structure 3 and a feeding device 2. The clamping structure 1 is used to clamp the fastener 33, the clamping release structure 3 is used to release the clamping of the fastener 33 by the clamping structure 1, and the feeding device 2 is used to feed the fastener 33 into the clamping structure 1.

[0038] Figure 2 Shows Figure 1 The specific structure of the clamping structure 1 and the clamping release structure 3.

[0039] The clamping structure 1 includes a plurality of clamping assemblies 11 and a fixing ring 4 connecting the ends of the clamping assemblies 11. An exemplary specific structure of the clamping assembly 11 is as follows: Figure 3 As shown, it includes at least three clamping assemblies 11 distributed in the circumferential direction of the fixing ring 4, the clamping assembly 11 includes a first clamping member 12 and a second clamping member 13, one end of the first clamping member 12 is movably and pivotally connected to the fixing ring 4 (for example, using a connecting shaft as a pivot shaft), and enables the first clamping member 12 to rotate around the connecting shaft relative to the fixing ring 4.

[0040] In the illustrated embodiment, the three first clamping members 12 can be circumferentially and evenly distributed at the bottom of the fixed ring 4, that is, with respect to the center of the fixed ring 4, the adjacent included angle between the adjacent first clamping members 12 can be 120°. It should be understood that more than three clamping assemblies 11 can have different interval angles in the circumferential distribution. For example, in the case of four clamping assemblies 11, the above-mentioned angle can be 90°. Exemplarily, when viewed from the side view direction, the first clamping member 12 can have an overall shape design with a radian or a broken line shape, so that when cooperating with the tightening system, the tightening working part can be accommodated in the internal area surrounded by the first clamping member 12 without structural interference.

[0041] The other end (the end far from the fixed ring 4) of the first clamping member 12 is movably and pivotally provided with a second clamping member 13. The second clamping member 13 can rotate relative to the first clamping member 12 around the connecting shaft. When the fastener 33 enters the range of the clamping assembly 11, the clamping ends of the second clamping member 13 respectively form a support for the flange surface of the fastener 33 to clamp the fastener 33. When the second clamping member 13 clamps the fastener 33, the clamping ends of the second clamping member 13 are evenly distributed around the flange surface of the fastener 33 to firmly clamp the fastener 33.

[0042] The fastener 33 can usually be in the form of a bolt. The clamping end of the second clamping member 13 bends from the main body part of the second clamping member 13 towards the surrounding internal area, so that after the plurality of clamping ends are closed, the flange surface protruding outwards of the fastener 33 is exactly located above the clamping end.

[0043] The clamping release structure 3 includes a plurality of clamping release assemblies 7 corresponding to the clamping assemblies 11 of the clamping structure 1. The specific structure of the clamping release assembly 7 is as Figure 4 shown, and it includes at least three clamping release assemblies 7 distributed in the circumferential direction of the fixed ring 4.

[0044] The clamping release assembly 7 includes a first clamping release member 8 and a second clamping release member 9. One end of the first clamping release member 8 is movably and pivotally connected to the fixed ring 4, so that the first clamping release member 8 can rotate relative to the fixed ring 4 around the connecting shaft.

[0045] In the illustrated embodiment, the three first clamping release members 8 can be circumferentially and evenly distributed at the bottom of the fixed ring 4, that is, with respect to the center of the fixed ring 4, the adjacent included angle between the adjacent first clamping release members 8 can be 120°. It should be understood that more than three first clamping release members 8 can have different interval angles in the circumferential distribution. For example, in the case of four clamping release assemblies 7, the above-mentioned angle can be 90°.

[0046] The other end of the first clamping release member 8 is movably and pivotally connected to the second clamping release member 9, and the second clamping release member 9 can rotate relative to the first clamping release member 8 about the connecting shaft.

[0047] The other end of the second clamping release member 9 is movably and pivotally connected to the positioning ring 10, so that the second clamping release member 9 can rotate relative to the positioning ring 10 about the connecting shaft.

[0048] In order to enable the clamping release assembly 7 to have a driving force for releasing the clamping state, in one embodiment, an elastic member 14 is provided on the second clamping release member 9 to provide this driving force. As Figure 4 shown, the elastic member 14 can be an elastic rubber ring. A groove is provided on the outer side of the second clamping release member 9 for placing the elastic rubber ring. A plurality of clamping release assemblies 7 are arranged in the circumferential direction. When not working, the elastic rubber ring is in a relaxed state and does not produce elastic deformation. When the elastic rubber ring is in a tensioned state and produces elastic deformation, the second clamping release member 9 is subjected to an inward driving force generated by the elastic rubber ring.

[0049] To transfer the above driving force from the clamping release structure 3 to the clamping structure 1, as Figure 2 shown, an elastic force transmission rod 15 can be provided between the second clamping member 13 and the elastic member 14. The elastic force transmission rod 15 can be a string. The two ends of the elastic force transmission rod 15 are respectively connected to the second clamping member 13 and the elastic member 14, and the connection position of the elastic force transmission rod 15 and the elastic member 14 is positioned between adjacent second clamping release members 9. In the illustrated embodiment, the first clamping release member 8 and the first clamping member 12 are alternately arranged at the bottom of the fixed ring 4; in other words, when viewed along the circumferential direction of the fixed ring 4, the first clamping release member 8 and the first clamping member 12 appear regularly in alternation. In this way, the clamping release assembly 7 can evenly apply force to the clamping assembly 11 to facilitate the smooth release of the clamping state.

[0050] A hook-shaped connection portion 34 is provided on the outer side of the second clamping member 13 to facilitate the transfer of the outward pulling force of the second clamping release member 9 to the second clamping member 13 through the elastic force transmission rod 15. Further, the clamping end of the second clamping member 13 is located inside the positioning ring 10, so that even if the outward pulling force of the second clamping release member 9 acts, the clamping end of the second clamping member 13 will not produce excessive offset.

[0051] The working mode of the present positioning device will be further described below.

[0052] When the fastener 33 is to be installed, the positioning ring 10 is placed on the fastener 33 installation hole, and the clamping ends of the second clamping member 13 are closed together and clamp the fastener 33. When the fixing ring 4 is subjected to downward force, the distance between the fixing ring 4 and the positioning ring 10 is reduced, and the first clamping release member 8 and the second clamping release member 9 rotate relative to each other, and the angle at the connection between the first clamping release member 8 and the second clamping release member 9 gradually decreases. At this time, the elastic component 14 moves outward with the second clamping release member 9 and is elastically deformed and gradually stretched. As the fixing ring 4 moves in the direction of the positioning 10, the elastic component 14 is pulled to the maximum deformation with the second clamping release member 9, and in the clamping assembly 11, the first clamping member 12 and the second clamping member 13 rotate relative to each other, so that the angle at the connection between the first clamping member 12 and the second clamping member 13 gradually decreases, and the clamping ends of the second clamping member 13 close together and clamp the fastener 33. In this way, the fastener 33 can be quickly positioned with the installation hole.

[0053] When it is necessary to release the clamping state, the force applied to the fixing ring 4 is released, and as the elastic rubber ring changes from a tensioned state to a relaxed state, a relative rotation occurs between the first clamping release member 8 and the second clamping release member 9, and the angle of the connection between the first clamping release member 8 and the second clamping release member 9 gradually increases. Under the action of the elastic force transmission rod 15, the clamping end of the second clamping member 13 is pulled outward and rotated inward with the connecting axis between the second clamping member 13 and the first clamping member 12 as the axis. A relative rotation occurs between the first clamping member 12 and the second clamping member 13, so that the angle of the connection between the first clamping member 12 and the second clamping member 13 gradually increases. Finally, the clamping ends of the second clamping member 13 move away from each other and release the clamping of the fastener 33, until the fastener 33 is completely lowered to release the clamping state.

[0054] Embodiment 2:

[0055] The tightening system of the present invention may also include a feeding device 2, see attached Figures 5 - 9 . Figure 5 and Figure 9 The specific structure of the feeding structure 5 in the feeding device 2 of the present invention is shown.

[0056] The feeding structure 5 includes a feeding part 16 and a fastener conveying part 17. The feeding part 16 is designed as a hollow cavity in the form of a funnel in this embodiment, so as to facilitate the replenishment and storage of fasteners 33. An appropriate amount of fasteners 33 can be placed in the feeding part 16, and the fasteners 33 can be released one by one at the bottom of the feeding part 16 to the next position (for example, a predetermined position on the fastener conveying part 17, which will be described in detail below), avoiding the process in the prior art that requires operators to take the fasteners 33 one by one, thereby saving time and labor costs.

[0057] In a typical implementation, the feeding section 16 can be connected to the fixing ring 4 through the first fixing connector 19. Both ends of the first fixing connector 19 can be circular rings, which are respectively sleeved on the outer sides of the fixing ring 4 and the feeding section 16 to fix and maintain balance. A feeding support 18 can also be fixed on the first fixing connector 19. The feeding support 18 can be set in an L shape. As Figure 6 shown, its top end is fixed on the first fixing connector 19, and its bottom end is located below the outlet of the feeding section 16.

[0058] In a typical implementation, the fastener conveying section 17 can include two parallel and spaced rails. The feeding support 18 includes a first support 36, a second support 37, and a third support 38. The bottom end of the first support 36 is perpendicularly connected to the second support 37. A number of movable rail adjusting members 24 are provided on one side of the second support 37. The rail adjusting members 24 are arranged at intervals along one side of the second support 37. A number of fixed rail connecting members 35 are provided on the other side. The rail connecting members 35 are cooperatively connected with the rail adjusting members 24. The rails of the fastener conveying section 17 are respectively inserted and cooperated with the rail connecting members 35 and the rail adjusting members 24. For example, one end of the rail adjusting member 24 is inserted into the second support 37 and is in interference fit with the second support 37 to adjust the rail spacing of the conveying section 17 to adapt to the sizes of different specifications of fasteners 33. The factor to be considered is that the distance between the two rails of the fastener conveying section 17 needs to be set slightly larger than the column diameter of the fastener 33 and slightly smaller than the maximum diameter of the flange surface where the fastener 33 is to be installed. A detachable third support 38 is also provided at the bottom end of the first support 36, and a rail of the fastener conveying section 17 is fixed on the bottom end of the third support 38.

[0059] The rails of the fastener conveying section 17 can be fixed directly below the outlet of the feeding section 16 through the feeding support 18, so that the screws falling out of the outlet of the feeding section 16 just fall on the rails, and the rails provide support for the flange surface of the fastener 33. In the use state, the rails of the fastener conveying section 17 can be designed to be inclined in the direction of gravity, so that the height of the part of the rail close to the clamping structure 1 is lower than the height of the part of the rail close to the feeding section 16. Thus, the fasteners 33 entering the rails move along the rails under the action of gravity, so as to convey the fasteners 33 to the position of the clamping end of the second clamping member 13.

[0060] In addition, for the fastener 33 in the form of a bolt, its center of gravity is usually located at the part with a smaller size of the fastener 33. Therefore, regardless of the initial posture of the fastener 33 released from the feeding section 16, after the fastener 33 contacts the rails of the fastener conveying section 17, under the action of gravity, the fastener 33 will naturally adjust its posture so that the flange surface of the fastener 33 is located above the rails, and the part with a smaller size of the fastener 33 is located between the rails.

[0061] As shown Figure 5 in the figure, a sliding bracket 20 may be provided at the top of the first bracket 36. The top of the sliding bracket 20 is fixedly connected to the first fixing connector 19. The present application embodiment does not make special limitations on the fixing method. Guide grooves 21 are respectively provided on the sides of the sliding bracket 20. A guide rod 22 can slide along the side wall of the guide groove 21, thereby driving the feeding bracket 18 to move. The guide rod 22 is provided at the top of the first bracket 36. As shown Figure 6 in the figure, the first bracket 36 can slide up and down along the guide groove 21, and drive the second bracket 37 and the third bracket 38 to slide up and down together, so as to adjust the distance between the second bracket 37 and the outlet of the feeding part 16, and enable the fastener 33 to smoothly fall into the slide rail. A locking member 23 is provided between the first bracket 36 and the sliding bracket 20. The locking member 23 can be a screw rod with threads at both ends. A through hole 39 is provided above the guide rod 22 on the first bracket 36. Pass the screw rod through this through hole 39 and through the guide groove 21, and then fix the positions at both ends of the screw rod with the locking member 23 to clamp the sliding bracket 20 and the first bracket 36, so that the positions of the sliding bracket 20 and the first bracket 36 are relatively fixed.

[0062] The feeding device 2 of the present utility model may further include a feeding control structure 6. Figure 7 The specific structure of the feeding control structure 6 is shown. The feeding control structure 6 functions to block the movement of the fastener 33 and can convey the fastener 33 to the positioning device as required. The feeding control structure 6 includes a rotary picking part 25, a rotating shaft 26 and a rotating assembly 27. The rotating assembly 27 is connected to the fixed ring 4 through a second fixing connector 28. One end of the second fixing connector 28 can also be set as a circular ring sleeved on the outer side wall of the fixed ring 4. The rotating assembly 27 is rotatably connected to the other end of the second fixing connector 28.

[0063] The rotary picking part 25 is positioned on the slide rail of the fastener conveying part 17, so that the movement path of the fastener 33 along the fastener conveying part is blocked, and the rotary picking part 25 is configured to be suitable for picking up the fasteners 33 one by one and enabling the picked fasteners 33 to continue to move along the slide rail of the fastener conveying part 17 into the positioning ring 10 of the positioning device.

[0064] A rotating shaft 26 is provided at the bottom of the rotating assembly 27. The rotary picking part 25 is fixed to the other end of the rotating shaft 26 and can be located in the middle part of the slide rail of the entire fastener conveying part 17, blocking the fasteners 33 on the slide rail from entering the clamping structure 1. When the rotating assembly 27 works, it drives the rotating shaft 26 to rotate, thereby driving the rotary picking part 25 to rotate. At this time, the blocked fasteners 33 rotate with the rotary picking part 25 and slide along the slide rail again to approach the clamping structure 1.

[0065] An exemplary rotating pick-up portion 25 may be a flexible brush having a plurality of rows of bristles radially spaced apart around a rotation axis 26 , so as to facilitate picking up and pushing fasteners 33 one by one.

[0066] Figure 8 The specific structure of the rotating assembly 27 of the utility model is shown. The rotating assembly 27 includes a ratchet toggle member 29 and a one-way ratchet 30. The ratchet toggle member 29 is rotatably connected to the second fixed connecting member 28 (such as Figure 7 As shown in the figure, two pawl stop teeth 31 are provided at the lower end, a rotatable one-way ratchet 30 is provided on the bottom surface of the second fixed connecting member 28 close to the ratchet toggle member 29, a rotating shaft 26 is provided on the bottom surface of the one-way ratchet 30, the ratchet wheel of the one-way ratchet 30 cooperates with the ratchet toggle member 29 and the two pawl stop teeth 31, the ratchet toggle member 29 is rotated, the one-way ratchet 30 is rotated and drives the rotating shaft 26 to rotate, thereby driving the rotating pickup part 25 to rotate. The ratchet of the one-way ratchet 30 is designed with a larger inclination angle on one side and the other side coinciding with the radial direction. The spacing between the two pawl stop teeth 31 is slightly larger than the width of the two ratchets and smaller than the width of three ratchets. The facing sides of the two pawl stop teeth 31 are set as planes, and the positions in contact with the ratchet wheels are set as rounded corners. When the pawl stop teeth 31 rotate and engage with the ratchet wheels, the one-way ratchet 30 can be controlled to control the rotation angle of the rotating removal part 25, so that the fasteners 33 enter the clamping structure 1 one by one. When one end of the ratchet toggle member 29 is pressed to rotate, the pawl stop tooth 31 close to the pressing side contacts the one-way ratchet 30, and then the other end of the ratchet toggle member 29 is pressed to make the pawl stop tooth 31 on this pressing side mesh with the ratchet, and the one-way ratchet 30 rotates a certain angle, and the rotating pick-up part 25 connected to the one-way ratchet 30 through the rotating shaft 26 also rotates a certain angle accordingly, and the fastener 33 closest to the rotating pick-up part 25 slides again along the two slide rails of the fastener conveying part 17 as the rotating pick-up part 25 rotates, and finally falls into the clamping structure 1.

[0067] Embodiment three:

[0068] Figure 9 The specific structure of a fastener tightening system of the utility model is shown. A fastener tightening system includes a tightening tool 32 and a fastener positioning device described in the first embodiment and a fastener feeding device 2 described in the second embodiment. The non-rotating part of the tightening tool 32 can be installed on the inner side of the fixing ring 4 of the clamping structure 1, and an anti-slip rubber pad can be provided between the inner side of the fixing ring 4 and the tightening tool 32 to make the fixation more secure. The rotating part of the tightening tool 32 (for example, the drill bit of a handheld electric drill) is positioned in the internal area surrounded by the fixing ring 4, the clamping assembly 11, the clamping release assembly 7 and the positioning ring 10. Typically, the tightening tool 32 can be a handheld electric drill.

[0069] The following describes the working process of the fastener tightening system in combination with the fastener tightening system of the utility model:

[0070] First, install the tightening tool 32 in the fixing ring 4, and then adjust the distance between the two slide rails of the fastener conveying part 17 through the slide rail adjusting part 24 according to the size of the fastener 33 to be installed, so that the distance between the two slide rails is slightly larger than the column diameter of the fastener 33 and slightly smaller than the maximum diameter of the flange surface. Put a proper amount of fasteners 33 in the feeding part 16, and vibrate the feeding part 16 to make the fasteners 33 fall one by one on the slide rail of the fastener conveying part 17. The fasteners 33 will be turned over on the slide rail of the fastener conveying part 17 under the action of gravity, and turned over to the flange surface facing up and the column of the fastener 33 facing down. The fasteners 33 that fall on the slide rail slide along the slide rail to the rotating pick-up part 25 under the action of gravity, and are blocked by the rotating pick-up part 25. When the slide rail between the rotating pick-up part 25 and the feeding part 16 is full of fasteners 33, the fasteners 33 in the feeding part 16 will no longer fall.

[0071] Then, one end of the ratchet toggle member 29 is pressed to make a pawl stop tooth 31 contact the one-way ratchet 30, and the other end of the ratchet toggle member 29 is pressed to make the other pawl stop tooth 31 engage with the one-way ratchet 30. At this time, the one-way ratchet 30 rotates a certain angle, and the rotating pick-up part 25 rotates a certain angle at the same time. The fastener 33 closest to the rotating pick-up part 25 continues to slide along the slide rail of the fastener conveying part 17 as the rotating pick-up part 25 rotates, and finally falls between the three second clamping members 13 of the clamping structure 1 and is clamped by the three second clamping members 13, while the next fastener 33 is blocked by the rotating pick-up part 25.

[0072] Then, move the tightening tool 32 to above the mounting hole of the fastener 33 and contact the positioning ring 10 with the mounting hole of the fastener 33 for preliminary positioning. Press the tightening tool 32 downward to drive the fixing ring 4 to move downward. After the first clamping release member 8 and the second clamping release member 9 are subjected to the downward external force, their connection will move outward, driving the elastic component 14 to be stretched until it is taut. At the same time, the fastener 33 moves downward under the clamping of the three second clamping members 13 and approaches the mounting hole of the fastener 33. When the lower end of the fastener 33 is flush with the positioning ring 10, continue to press the tightening tool 32 downward, the connection between the first clamping release member 8 and the second clamping release member 9 continues to move outward, the elastic component 14 continues to stretch and move outward, driving the elastic force transmission The rod 15 moves outward to lift the second clamping member 13, causing the lower end of the second clamping member 13 to rotate outward. At this time, the drill bit of the tightening tool 32 contacts the fastener 33. The rotating part of the tightening tool 32 is rotated and continuously pressed down. The fastener 33 is screwed into the mounting hole of the fastener 33 by the drill bit of the tightening tool 32. The elastic component 14 is stretched, and the elastic force transmission rod 15 drives the lower end of the second clamping member 13 to rotate outward, and the fastener 33 is completely lowered to release the clamping state. At this point, the installation of the fastener 33 is completed. The fastener 33 is released. Under the rebound tension of the elastic rubber ring, the connection between the first clamping release member 8 and the second clamping release member 9 moves inward to return to its original position, and the second clamping member 13 returns to its original position under the action of gravity.

[0073] The above description is only a preferred embodiment of the present invention, and does not limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made by using the contents of the specification and drawings of the present invention, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A fastener tightening system, characterized in that: It comprises a tightening tool (32) and a fastener positioning device, wherein the fastener positioning device is attached to the non-rotating part of the tightening tool (32) and surrounds the rotating part of the tightening tool (32); The fastener positioning device comprises a clamping structure (1) and a clamping release structure (3); The clamping structure (1) comprises a plurality of clamping assemblies (11) distributed in a circumferential direction of the tightening tool (32), wherein the clamping assemblies (11) are capable of movably and pivotally clamping the fastener (33); The clamping release structure (3) comprises a plurality of clamping release components (7) distributed in the circumferential direction of the tightening tool (32), and the clamping release components (7) are capable of movably and pivotally releasing the clamping of the clamping structure (1) on the fastener (33).

2. A fastener tightening system according to claim 1, characterized in that: The clamping structure (1) also includes a fixing ring (4), and the fastener positioning device is attached to the non-rotating part of the tightening tool (32) through the fixing ring (4); the clamping assembly (11) is movably and pivotally connected to the bottom of the fixing ring (4); the clamping assembly (11) includes a first clamping member (12) and a second clamping member (13); one end of the first clamping member (12) is movably and pivotally connected to the bottom of the fixing ring (4), and the other end of the first clamping member (12) is movably and pivotally connected to one end of the second clamping member (13), so that the clamping end of the second clamping member (13) can be closed and clamp the fastener (33).

3. A fastener tightening system according to claim 2, characterized in that: The clamping release structure (3) further comprises a positioning ring (10); the clamping release assembly (7) is movably and pivotally connected to the fixing ring (4) and is arranged in the circumferential direction of the fixing ring (4); the clamping release assembly (7) and the clamping assembly (11) are arranged alternately; the clamping release assembly (7) comprises a first clamping release member (8) and a second clamping release member (9); one end of the first clamping release member (8) is movably and pivotally connected to the fixing ring (4), and the other end of the first clamping release member (8) is movably and pivotally connected to one end of the second clamping release member (9); The other end of the second clamping release member (9) is movably and pivotally connected to the positioning ring (10), so that the clamping release assembly (7) limits the movement of the positioning ring (10) in a direction approaching or moving away from the fixing ring (4).

4. A fastener tightening system according to claim 3, characterized in that: An elastic component (14) is arranged on the outer side of the second clamping release member (9); the elastic component (14) provides a driving force for resetting the clamping release assembly (7); the elastic component (14) is an elastic rubber ring extending circumferentially along the outer side of the second clamping release member (9); an elastic force transmission rod (15) is arranged between the elastic component (14) and the second clamping member (13); the elastic force transmission rod (15) drives the clamping assembly (11) to reset when the clamping release assembly (7) is reset.

5. A fastener tightening system according to claim 2, characterized in that: It also includes a feeding device (2); the feeding device (2) includes a feeding structure (5) and a feeding control structure (6); The feeding structure (5) comprises a feeding section (16) for storing and releasing the fasteners (33) one by one, and a fastener conveying section (17) for conveying the fasteners (33) to the clamping assembly (11) in the form of a slide rail; the feeding control structure (6) is used to control the number of the fasteners (33) in the feeding structure (5) entering the clamping assembly (11) and the conveying speed.

6. A fastener tightening system according to claim 5, characterized in that: The feeding structure (5) comprises the feeding part (16) and the fastener conveying part (17); the feeding part (16) is connected to the fixing ring (4) via a first fixing connecting part (19); a feeding bracket (18) is provided on the first fixing connecting part (19); the top end of the feeding bracket (18) is connected to the first fixing connecting part (19), and the bottom end of the feeding bracket (18) is connected to the fastener conveying part (17); the fastener conveying part (17) is located below the outlet of the feeding part (16).

7. A fastener tightening system according to claim 6, characterized in that: The feeding bracket (18) is provided with a sliding mechanism; the sliding mechanism comprises a sliding bracket (20), a guide groove (21), a guide rod (22) and a locking piece (23); the top end of the sliding bracket (20) is connected to the first fixed connecting piece (19); the side of the sliding bracket (20) is provided with the guide groove (21); the feeding bracket (18) is provided with the guide rod (22); the guide rod (22) is matched and connected with the guide groove (21), so that the feeding bracket (18) slides up and down along the guide groove (21); the locking piece (23) is provided between the feeding bracket (18) and the sliding bracket (20), so that the positions of the feeding bracket (18) and the sliding bracket (20) are relatively locked.

8. A fastener tightening system according to claim 7, characterized in that: The feeding bracket (18) includes a first bracket (36), a second bracket (37) and a third bracket (38); the top end of the first bracket (36) is slidably connected to the sliding bracket (20), and the bottom end of the first bracket (36) is fixedly connected to the second bracket (37); a slide rail adjusting member (24) is provided on one side of the second bracket (37), and a slide rail connecting member (35) is provided on the other side of the second bracket (37); one end of the slide rail adjusting member (24) is inserted into the second bracket (37) and has an interference fit with the second bracket (37), and the other end of the slide rail adjusting member (24) is connected to the slide rail of the fastener conveying part (17); the bottom end of the first bracket (36) is also provided with a detachable third bracket (38); the bottom end of the third bracket (38) is provided with the slide rail of the fastener conveying part (17).

9. A fastener tightening system according to claim 8, characterized in that: The feeding control structure (6) comprises a rotating pick-up part (25); the rotating pick-up part (25) is a flexible brush having a plurality of rows of bristles radially arranged at intervals around a rotating shaft (26).

10. A fastener tightening system according to claim 9, characterized in that: The feeding control structure (6) further comprises a rotating assembly (27); the rotating assembly (27) is connected to the fixed ring (4) via a second fixed connecting member (28); the rotating assembly (27) comprises a ratchet toggle member (29) and a one-way ratchet (30); a ratchet stop tooth (31) is provided on the ratchet toggle member (29); the ratchet stop tooth (31) is meshed with the gear teeth of the one-way ratchet (30); the ratchet stop tooth (31) is provided with the rotating shaft (26) at the bottom of the one-way ratchet (30); the rotating shaft (26) is connected to the rotating pickup portion (25).

Images