Tightening device

Abstract

A tightening device relates to the technical field of tools for tightening fasteners and comprises a gun head assembly, a screwdriver assembly, a driving assembly, a base and a vacuum tube, the gun head assembly is arranged on the base, a second supporting seat and a third supporting seat are slidably arranged on the base, and the vacuum tube is arranged between the second supporting seat and the gun head assembly. The screwdriver assembly comprises a screwdriver body and a screwdriver head, the screwdriver body is arranged on the third supporting seat, and the screwdriver head is arranged between the screwdriver body and the vacuum tube; the driving assembly comprises a cap recognizing air cylinder and a stroke air cylinder, the cap recognizing air cylinder and the stroke air cylinder are fixed to the base, a first telescopic rod of the cap recognizing air cylinder and a second telescopic rod of the stroke air cylinder are connected with the third supporting base and drive the third supporting base to slide on the base, and the third supporting base drives the second supporting base to slide on the base. The tightening device is small in occupied volume.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of the tool of tightening fastener, specifically relates to a tightening device. BACKGROUND

[0002] Traditional screw tightening method is by hand holding screw, tightening gun tightens, later with the progress of technology, screw can be tightened in the screw hole through automatic tightening device. When tightening screw, generally screw is first fed to clamp, then vacuum pipe is driven to move by cap recognizing cylinder, vacuum pipe adsorbs screw through negative pressure and sends to the screw hole to be tightened, then travel cylinder is started, the bit on screw driver is combined with screw, and screw is tightened to tighten screw.

[0003] But in prior art, cap recognizing cylinder and travel cylinder are generally arranged in sequence along the movement direction of vacuum pipe, therefore, the whole tightening device occupies larger space. Further, in the process that cap recognizing cylinder drives vacuum pipe to move, the cylinder body of travel cylinder also moves forward together. After the telescopic rod of cap recognizing cylinder is stretched in place, travel cylinder controls the bit to move in the new position. If the stroke of cap recognizing cylinder has error, the initial position of travel cylinder is directly in the position with error. The above movement mode also causes error accumulation, reduces the accuracy of tightening device. CONTENT OF THE UTILITY MODEL

[0004] The utility model provides a kind of tightening device, and the volume occupied by the tightening device is smaller.

[0005] Further, the tightening device can also reduce the accumulated error in the process of tightening screw.

[0006] To achieve the above object, the utility model provides the following technical scheme:

[0007] A kind of tightening device, including gun head assembly, screw driver assembly, drive assembly, pedestal and vacuum pipe, the gun head assembly is set on pedestal, second support seat and third support seat are slidably arranged on the pedestal, one end of the vacuum pipe is fixedly connected with the second support seat, the other end is movably inserted into the gun head assembly along the direction of its own axis, the screw driver assembly includes screw driver body and bit, the screw driver body is arranged on the third support seat, one end of the bit is connected with the screw driver body, and the other end is slidably inserted into the vacuum pipe along its own axis line;The drive assembly includes cap recognizing cylinder and travel cylinder, the cap recognizing cylinder and the travel cylinder are fixed on the pedestal, the first telescopic rod of the cap recognizing cylinder and the second telescopic rod of the travel cylinder are connected with the third support seat, drive the third support seat to slide on the pedestal, the third support seat drives the second support seat to slide on the pedestal.

[0008] Preferably, a fourth support base is further arranged on the base, and the cap recognizing cylinder and the stroke cylinder are arranged on the fourth support base in parallel along the width direction of the tightening device and below the screwdriver body.

[0009] Preferably, the cap recognizing cylinder and the stroke cylinder are symmetrically arranged on the fourth support base with respect to the vertical plane of the axis of the vacuum tube.

[0010] Preferably, a driving structure is arranged between the third support base and the fourth support base, and when the cap recognizing cylinder and / or the stroke cylinder pushes the third support base, the third support base drives the second support base to move towards the gun head assembly through the driving structure.

[0011] Preferably, the driving structure comprises a second elastic member arranged between the second support base and the third support base.

[0012] Preferably, a guide column is further arranged between the third support base and the second support base, the second elastic member is sleeved on the guide column, the second support base is formed with a guide channel, one end of the guide column is fixed to the third support base, and the other end extends into the guide channel movably along the axis direction of the guide column.

[0013] Preferably, the gun head assembly is fixed to the base through a first support base, a limiting column is arranged on the first support base, one end of the limiting column is connected with the first support base, and the other end extends towards the second support base, and the length of the limiting column is adjusted to control the stroke of the vacuum tube.

[0014] Preferably, a positioning bushing is arranged on the second support base, and one end of the vacuum tube towards the second support base is fixed to the second support base through the positioning bushing; a guide bushing is arranged on the first support base, the guide bushing is fixed to the gun head assembly, and one end of the vacuum tube towards the first support base extends into the guide bushing movably along the axis direction of the vacuum tube.

[0015] Preferably, O-rings are arranged on the positioning bushing and the guide bushing.

[0016] Preferably, one end of the first telescopic rod on the cap recognizing cylinder towards the third support base or one end of the second telescopic rod of the stroke cylinder towards the third support base is fixedly connected with the third support base.

[0017] Compared with the prior art, the utility model has the beneficial effects that:

[0018] In summary, in the present application, the slider structure is arranged in the gun head body, so that the gun head assembly can change the communication state between the multiple channels in the gun head assembly through the switching of the position of the slider body, and then complete the screw up work. This cancels the arrangement of the swing arm, changes the uplink structure, reduces the beat, avoids the collision of the vacuum tube with the swing arm, does not produce metal chips, and ensures the cleanliness of the uplink link.

[0019] Further, through the arrangement of the locking block in the feeding sleeve and the arrangement of the mounting mode of the sleeve body, the locking block can fix the sleeve body, and when the sleeve body is replaced, the locking block is moved, and the sleeve body can be taken out. This can more simply replace the sleeve body, save time cost, and improve production efficiency.

[0020] Further, through the arrangement of the two gas cylinders in parallel and below the screwdriver body, the length and width of the entire tightening device can be shortened, and the space occupied by the device can be reduced; through the movement mode of the second support seat and the third support seat, the error accumulation during movement is reduced, and the accuracy during screwing is ensured.

[0021] The above description is only a summary of the technical scheme of the present application, in order to more clearly understand the technical means of the present application, the content of the specification can be implemented, and in order to make the above and other purposes, features and advantages of the present application more obvious and easy to understand, the following preferred embodiments are described in detail, and the accompanying drawings are described as follows. BRIEF DESCRIPTION OF DRAWINGS

[0022] Figure 1 Fig. 1 is a schematic view of the axial side structure of the tightening device provided by the embodiment of the present application.

[0023] Figure 2 Fig. 2 is a schematic view of the top structure of the tightening device. Figure 1

[0024] Figure 3 Fig. 3 is a schematic view of the side structure of the tightening device. Figure 1

[0025] Figure 4 Fig. 4 is a schematic view of the axial side structure of the gun head assembly from the first perspective. Figure 1

[0026] Figure 5 Fig. 5 is a schematic view of the axial side structure of the gun head assembly from the second perspective. Figure 1

[0027] Figure 6 Fig. 6 is a schematic view of the axial side structure of the gun head assembly from the third perspective. Figure 1

[0028] ​​​​​Figure 7 The gun head body and the slider structure after omitting the side plate are shown in the exploded structural schematic diagram.

[0029] Figure 8 The shaft side structure schematic diagram of the slider assembly is shown.

[0030] Figure 9 The exploded structural schematic diagram of the slider assembly is shown.

[0031] Figure 10 The shaft side structure schematic diagram of the middle bottom plate is shown. Figure 8

[0032] Figure 11 The cross-sectional structural schematic diagram of the middle bottom plate is shown. Figure 8

[0033] Figure 12 The combined cross-sectional structural schematic diagram of the middle bottom plate and the first connecting shaft group is shown. Figure 8

[0034] Figure 13 The combined cross-sectional structural schematic diagram of the middle bottom plate, the slider body and the first connecting shaft is shown. Figure 8

[0035] Figure 14 The shaft side structure schematic diagram of the slider body from the first perspective is shown.

[0036] Figure 15 The shaft side structure schematic diagram of the slider body from the second perspective is shown.

[0037] Figure 16 The shaft side structure schematic diagram of the slider body combined with the bottom plate from the first perspective is shown.

[0038] Figure 17 The shaft side structure schematic diagram of the slider body combined with the bottom plate from the second perspective is shown.

[0039] Figure 18 The shaft side structure schematic diagram of the first side plate is shown.

[0040] Figure 19 The shaft side structure schematic diagram of the second side plate is shown.

[0041] Figure 20 The shaft side structure schematic diagram of the gun head body from the first perspective is shown.

[0042] Figure 21 The shaft side structure schematic diagram of the gun head body from the second perspective is shown.

[0043] Figure 22 The shaft side structure schematic diagram of the gun head body from the third perspective is shown.

[0044] ​​​​Figure 23 Fig. 12 is a top view of the gun head assembly.

[0045] Figure 24 Fig. 13 is a cross-sectional view of the gun head assembly in the XXIV-XXIV direction. Figure 23

[0046] Figure 25 Fig. 14 is a side view of the feed sleeve.

[0047] Figure 26 Fig. 15 is a side view of the clamp assembly from a first perspective. Figure 1

[0048] Figure 27 Fig. 16 is a side view of the clamp assembly from a second perspective.

[0049] Figure 28 Fig. 17 is a side view of the clamp assembly from a third perspective.

[0050] Figure 29 Fig. 18 is a side view of the clamp mounting block. Figure 26

[0051] Figure 30 Fig. 19 is a side view of the clamp mounting block from a second perspective.

[0052] Figure 31 Fig. 20 is a side view of the clamp mounting seat. Figure 26

[0053] Figure 32 Fig. 21 is a side view of the clamp mounting seat from a second perspective.

[0054] Figure 33 Fig. 22 is a side view of the clamp lock. Figure 26

[0055] Fig. 23 is a side view of the clamp lock connected to the air cylinder. Figure 34 Figure 33 Fig. 24 is a side view of the clamp mounting seat combined with the clamp lock.

[0056] Figure 35 Fig. 25 is a side view of the clamp body combined with the clamp lock.

[0057] Figure 36 Figure 26 Fig. 26 is a side view of the clamp body.

[0058] Figure 37 Fig. 27 is a side view of the clamp body. Figure 26

[0059] ​​​​​​​Figure 38 Fig. 17 is a schematic view of the shaft side structure of the tightening device without the gun head assembly and the clamp assembly. Figure 1

[0060] Figure 39 Fig. 18 is a schematic view of the shaft side structure of the tightening device without the screwdriver assembly. Figure 1

[0061] Figure 40 Fig. 19 is a schematic view of the shaft side structure of the tightening device without the first support base and the connecting block. Figure 1

[0062] Figure 41 Fig. 20 is a schematic view of the shaft side structure of the positioning bushing. Figure 40

[0063] Figure 42 Fig. 21 is a schematic view of the shaft side structure of the guide bushing. Figure 40

[0064] ​​​​​10, gun head assembly; 11, gun head body; 111, groove; 1111, first groove; 1112, second groove; 112, first channel; 113, second channel; 114, third channel; 1141, first communication hole; 1142, second communication hole; 115, locking block mounting groove; 116, first elastic member; 12, sliding block structure; 121, bottom plate; 1211, sliding groove; 1212, driving groove; 1213, first connecting shaft; 1214, driving interface; 1215, first sealing washer; 122, sliding block body; 1221, fourth channel; 1222, fifth channel; 1223, side surface; 1224, first end surface, 1225, second end surface; 1226, top surface; 1227, inclined surface; 1228, first connecting block; 1229, position detection hole; 123, first side plate; 124, second side plate; 125, guide groove; 1251, proximity switch; 1252, proximity groove; 126, positioning rod; 13, feeding sleeve; 131, sleeve body; 1311, first blocking ring; 1312, air hole; 1313, second blocking ring; 1314, recessed part; 132, locking block; 1321, protruding part; 1322, first rotating shaft; 1323, pressing part; 1331, first space; 1332, second space; 20, clamp assembly; 21, power source; 22, mounting seat; 221, clamp sliding groove; 222, through groove; 23, clamp lock; 231, sliding groove; 24 clamp body; 241, second connecting shaft; 242, clamping part; 25, clamp mounting block; 251, sixth channel; 252, clamp mounting groove; 30, screwdriver assembly; 31, screwdriver body; 32, bit; 40, driving assembly; 41, cap recognition cylinder; 42, stroke cylinder; 43, driving structure; 431, second elastic member; 432, guide column; 50, base; 51, first support seat; 511, limiting column; 52, second support seat; 521, guide channel; 522, connecting block; 523, vacuum joint; 53, third support seat; 54, fourth support seat; 61, vacuum pipe; 62, positioning bushing; 63, O-ring; 64, guide bushing; 65, mounting joint. DETAILED DESCRIPTION

[0065] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0066] The utility model provides a kind of tightening device, the fixed mode of screw channel and gun head in the process that screw enters gun head is changed, so that the replacement of screw channel is more simple, improve production efficiency.

[0067] As Figures 1 to 3 The utility model discloses a kind of tightening device, including gun head component 10, clamp component 20, screwdriver component 30, driving component 40 and base 50.Gun head component 10 is fixed on base 50 by first support seat 51, preferably on the end of base 50.Gun head component 10 is connected with clamp component 20.Second support seat 52 is slidably arranged on base 50, and second support seat 52 is located at the end of gun head component 10 away from clamp component 20.Vacuum tube 61 is arranged between second support seat 52 and gun head component 10.Third support seat 53 is slidably arranged on base 50.Screwdriver component 30 includes screwdriver body 31 and bit 32, and screwdriver body 31 is arranged on third support seat 53, and one end of bit 32 is connected with screwdriver body 31, and the other end can be slid into vacuum tube 61 along its own axis.Driving component 40 includes cap cylinder 41 and stroke cylinder 42, and cap cylinder 41 and stroke cylinder 42 are fixedly arranged on base 50, specifically on the fourth support seat 54 on base 50.The first telescopic rod (not marked in drawing) on cap cylinder 41 and the second telescopic rod (not marked in drawing) on stroke cylinder 42 are connected with third support seat 53 after passing through fourth support seat 54, drive third support seat 53 to slide along base 50, and third support seat 53 drives second support seat 52 to slide on base 50.

[0068] As Figures 4 to 7 And Figures 20 to 22 Gun head component 10 includes gun head body 11, slider structure 12 and feeding sleeve 13 for screw into gun head body 11, as shown in the drawings.Groove 111 is provided on gun head body 11, and slider structure 12 is movably arranged in groove 111 in the width direction of the device (i.e. Figure 2 in up-down direction), and feeding sleeve 13 is arranged on gun head body 11.Gun head body 11 is provided with first channel 112, second channel 113 and third channel 114.First channel 112 and second channel 113 are horizontally arranged, and are arranged on both sides of groove 111 respectively.First channel 112 is connected between clamp component 20 and groove 111, and second channel 113 is connected between groove 111 and vacuum tube 61.Third channel 114 is connected between feeding sleeve 13 and groove 111.Preferably, first channel 112 and second channel 113 are horizontally arranged, and third channel 114 is obliquely arranged.In other words, feeding sleeve 13 is installed on the upper end of third channel 114, i.e. the side of third channel 114 away from groove 111.

[0069] Please continue to refer toFigures 6 to 13 The slider structure 12 comprises a bottom plate 121 and a slider body 122. The bottom plate 121 is fixed in the groove 111 of the head body 11. A sliding groove 1211 is formed on the bottom plate 121 along the width direction of the head body 11, i.e. the up-down direction as shown in the figure. The slider body 122 is slidably arranged in the sliding groove 1211 along the length direction of the sliding groove 1211. Figure 2

[0070] Please continue to refer to Figures 14 to 17 A fourth channel 1221 and a fifth channel 1222 are formed on the slider body 122. Both the fourth channel 1221 and the fifth channel 1222 pass through the slider body 122. The slider body 122 moves on the bottom plate 121 along the width direction of the head assembly 10, so that the slider body 122 has a first position and a second position in the groove 11. When the slider body 122 is in the first position, the first channel 112 is communicated with the feeding sleeve 13 through the fourth channel 1221 and the third channel 114. When the slider body 122 is in the second position, the first channel 112 is communicated with the vacuum pipe 61 through the fifth channel 1222 and the second channel 113.

[0071] That is, by sliding the slider body 122 left and right, the communication between the first channel 112 and different channels in the head assembly 10 can be realized.

[0072] When feeding the screws, the slider body 122 can be moved to the first position. At this time, the screws entering from the feeding sleeve 13 can enter the first channel 112 through the third channel 114 and the fourth channel 1221 and be clamped by the clamp assembly 20. After the screws enter the first channel 112, the slider body 122 can be moved to the second position. At this time, the first channel 112 is communicated with the second channel 113 through the fifth channel 1222 to form a channel for the vacuum pipe 61 and the bit 32 to pass through.

[0073] Further, when the slider body 122 is in the second position, although the communication between the first channel 112 and the third channel 114 is interrupted, the third channel 114 is still communicated with the feeding sleeve 13, so that new screws can still enter the third channel 114. The third channel 114 plays a role of storing screws. When the position of the slider body 122 is moved to the first position again, the screws stored in the third channel 114 will directly enter the first channel 112 through the fourth channel 1221, so as to save the feeding time of the screws and speed up the production rhythm.

[0074] Through the above arrangement, the feeding of the screws can be realized by changing the position of the slider body 122, which cancels the arrangement of the swing arm and avoids the collision between the vacuum pipe 61 and the swing arm, so that metal chips will not be generated and the cleaning of the feeding link is ensured.

[0075] ​Further, in order to ensure that the fourth channel 1221 and the fifth channel 1222 can communicate with the first channel 112 when the slider body 122 is in the transition position, the line connecting the center points of the ends of the fourth channel 1221 and the fifth channel 1222 is a horizontal line on the side of the slider body 122 facing the first channel 112. In other words, on this side, the center points of the ends of the fourth channel 1221 and the fifth channel 1222 are in the same plane as the axis of the first channel 112.

[0076] Further, the slider body 122 includes two vertical side surfaces 1223, a first end surface 1224 on the side facing the first channel 112, a second end surface 1225 on the side away from the first channel 112, and a top surface 1226. An upper inclined surface 1227 is further formed between the second end surface 1225 and the top surface 1226. The fourth channel 1221 communicates between the upper inclined surface 1227 and the first end surface 1224, and the fifth channel 1222 communicates between the first end surface 1224 and the second end surface 1225. The fourth channel 1221 is an inclined channel, and the fifth channel 1222 is a horizontal channel.

[0077] A position detection hole 1229 is further provided on the upper inclined surface 1227. A sensor can be arranged in the position detection hole 1229 to detect whether a screw is in the fourth channel 1221 or the fifth channel 1222.

[0078] Further, the slider structure 12 further includes a first side plate 123 and a second side plate 124, which are fixed to the bottom plate 121 and are respectively located on the two sides of the slider body 11. The bottom plate 121, the first side plate 123, the second side plate 124, and the gun head body 11 collectively enclose a receiving space for accommodating the slider body 122, so as to prevent foreign matter from entering the space.

[0079] Further, please continue to refer to Figures 10 to 15 A first connecting block 1228 is formed at the bottom of the slider body 122, and a driving groove 1212 and a first connecting shaft 1213 are provided in the bottom plate 121. The driving groove 1212 communicates with the sliding groove 1211, and the first connecting shaft 1213 can be fixed to the first connecting block 1228 by bolts or other fixing members, and the two ends of the first connecting shaft 1213 respectively extend into the two driving grooves 1212. A driving interface 1214 is formed on the driving groove 1212, and the first connecting shaft 1213 can be driven by a driving fluid such as oil or gas, so as to drive the slider body 122 to move in the sliding groove 1211 through the first connecting block 1228.

[0080] In the embodiment, the movement of the first connecting shaft 1213 can be driven in a pneumatic manner. In order to ensure the sealing performance during driving, a first sealing washer 1215 is sleeved on the portion of the first connecting shaft 1213 extending into the driving groove 1212.

[0081] During driving, one of the driving grooves 1212 is ventilated and the other one is exhausted, so as to realize the movement of the first connecting shaft 1213 in the sliding groove 1211. The first connecting shaft 1213 is connected with the sliding block body 122, and the position conversion of the sliding block body 122 can be completed.

[0082] Further, the positioning rods 126 are installed on both sides of the sliding block body 122, and the guide grooves 125 corresponding to the positioning rods 126 are formed on the first side plate 123 and the second side plate 124. The positioning rods 126 extend into the guide grooves 125, so as to guide the movement of the sliding block body 122. Through the cooperation of the positioning rods 126 and the guide grooves 125 and the cooperation of the first connecting shaft 1213 and the driving grooves 1212, the stable sliding of the sliding block body 122 can be ensured, and the accurate alignment between the channels can be ensured.

[0083] Further, the proximity switches 1251 for sensing the position of the sliding block body 122 are arranged on the first side plate 123 and the second side plate 124. When the proximity switches 1251 on the first side plate 123 or the second side plate 124 sense the corresponding positioning rods 126, it means that the position conversion of the sliding block body 122 has been completed. At this time, the pump body connected with the driving interface 1214 can stop working. The device can be used for nailing or subsequent tightening work.

[0084] Further, the proximity grooves 1252 communicating with the guide grooves 125 are arranged on the first side plate 123 and the second side plate 124, and the proximity switches 1251 are arranged in the proximity grooves 1252.

[0085] In the embodiment, the distance between the center points of the ends of the fourth channel 1221 and the fifth channel 1222 on the end of the sliding block body 122 facing the first channel 112 is equal to the stroke of the sliding block body 122. Here, the stroke of the sliding block body 122 is the distance between the first side plate 123 and the second side plate 124 minus the difference in width of the sliding block body 122.

[0086] More specifically, the cylinders, the pump body, the proximity switches 1251 and the screwdriver body 31 can be driven by a control device (not shown in the figure), such as a PLC. The use of PLC to receive signals and control related components to work as a tightening device is a conventional knowledge, which will not be described in detail here.

[0087] Further, please continue to refer to 7, Figures 20 to 22 As shown in FIG. 1, the groove 111 includes a first groove 1111 and a second groove 1112 which is in communication with the first groove 1111. The second groove 1112 is located at the bottom of the gun head body 11 compared with the first groove 1111. When the slider structure 12 is arranged in the groove 111, the bottom plate 121 is arranged in the second groove 1112 and the slider body 122 extends into the first groove 1111.

[0088] Please continue to refer to Figure 4 , Figures 22 to 25 The feeding sleeve 13 includes a sleeve body 131 and a locking block 132. One end of the sleeve body 131 extends into the third passage 114 in the gun head body 11. The locking block 132 is swingably mounted on the gun head body 11. A first retaining ring 1311 is formed on the sleeve body 131. When the sleeve body 131 of the feeding sleeve 13 is mounted on the gun head body 11 of the gun head assembly 10, the locking block 132 abuts against the first retaining ring 1311 from the side of the first retaining ring 1311 away from the gun head body 11 to prevent the sleeve body 131 from being taken out of the third passage 114 in the gun head body 11, that is, the locking block 132 locks the sleeve body 131.

[0089] Through the above arrangement, when the sleeve body 131 needs to be replaced, the locking block 132 can be removed to release the locking of the sleeve body 131 by the locking block 132. At this time, the sleeve body 131 can be directly taken out of the third passage 114, and then the sleeve body 131 can be replaced. When the sleeve body 131 is put back into the third passage 114, the locking block 132 can be abutted against the first retaining ring 1311 again, at this time, the sleeve body 131 cannot be taken out of the third passage 114 again, that is, the fixing of the sleeve body 131 is completed. This can more simply replace the sleeve body 131 and save time cost.

[0090] Preferably, when the sleeve body 131 is mounted in the third passage 114, the first retaining ring 1311 is flush with the end face of the third passage 114 away from the groove 111. When the locking block 132 locks the sleeve body 131, at least a part of the locking block 132 coincides with the third passage 114 in the axial direction of the sleeve body 131. Through the above arrangement, the sleeve body 131 can be stably mounted on the gun head body 11.

[0091] Preferably, the end of the locking block 132 in contact with the first retaining ring 1311 protrudes in the direction of the axis of the sleeve body 131 to form a protruding part 1321 which abuts against the first retaining ring 1311 to lock the sleeve body 131.

[0092] Further, in the present embodiment, a locking block mounting groove 115 is formed on the gun head body 11, a first pivot 1322 is provided on the locking block 132, and the locking block 132 is swingably arranged in the locking block mounting groove 115 through the first pivot 1322. Specifically, the locking block mounting groove 115 can be arranged on the top of the gun head body 11, and the locking block 132 is swingably arranged in the locking block mounting groove 115 through the first pivot 1322. When the locking block 132 is pressed away from one end of the first blocking ring 1311, the locking block 132 abutting on one end of the first blocking ring 1311 can be lifted up to complete the unlocking of the sleeve body 131, and the sleeve body 131 can be smoothly taken out from the third channel 114.

[0093] Further, the feeding sleeve 13 further comprises a first elastic member 116 arranged between the locking block 132 and the gun head body 11 to store elastic energy when the locking block 132 cancels the locking of the sleeve body 131, and the release of the elastic energy can make the locking block 132 abut on the first blocking ring 1311 again. That is, through the arrangement of the first elastic member 116, it can be ensured that after the external force acting on the locking block 132 is cancelled, the locking block 132 abuts on the first blocking ring 1311 again, so as to ensure that the locking block 132 can stably lock the sleeve body 131.

[0094] Preferably, the first elastic member 116 is located at one end of the locking block 132 away from the first blocking ring 1311. In other words, the first elastic member 116 and the first blocking ring 1311 are respectively located on both sides of the first pivot 1322. A pressing portion 1323 is further arranged on the locking block 132, and the pressing portion 1323 and the first blocking ring 1311 are respectively located on both sides of the first pivot 1322, so as to facilitate the application of pressure to the locking block 132, so that the locking block 132 releases the locking of the sleeve body 131.

[0095] Further, please continue to refer to Figure 22 A first communication hole 1141 and a second communication hole 1142 for airflow flow are formed on the gun head body 11 and communicate with the third channel 114. In the upward screwing direction, the second communication hole 1142 is located downstream of the first communication hole 1141. An air hole 1312 is formed on the sleeve body 131.

[0096] When the screw is fed, the second communication hole 1142 can be used to suck air into the third channel 114. Since the screw itself can have dust, when the screw is fed, the second communication hole 1142 can be used to suck air to remove the dust on the screw from the air hole 1312 without affecting the screw feeding. It should be noted that at this time, the first communication hole 1141 can be used as a counterflow air hole of the second communication hole 1142, that is, when the second communication hole 1142 sucks air, the external air flow can flow from the first communication hole 1141 to ensure smooth air flow.

[0097] In other embodiments, the first communication hole 1141 can also be actively injected with air flow. When the first communication hole 1141 is actively injected with air flow, the position of the screw in the third channel 114 needs to be considered. When the screw has fallen to the bottom of the third channel 114, air flow can be injected into the first communication hole 1141, on the one hand, the injection of air flow can blow the dust off the screw, on the other hand, the injection of air flow can also prevent the screw from being retracted from the sleeve body 131 away from the one end of the gun body 11.

[0098] It should be noted that the position of the screw in the third channel 114 can be determined by the proximity switch 1251 on the first side plate 123 and the second side plate 124, that is, by the position of the slider body 122. When the slider body 122 is in the second position and the third channel 114 has a screw, or when the slider body 122 is just converted from the second position to the first position, air can be blown through the first communication hole 1141 to ensure smooth feeding.

[0099] Further, the sleeve body 131 has a second blocking ring 1313, when the sleeve body 131 extends into the third channel 114, the sleeve body 131, the first blocking ring 1311, the second blocking ring 1313 and the inner side wall of the third channel 114 form a closed first space 1331. The first communication hole 1141 is in communication with the first space 1331, and a part of the air hole 1312 is formed on the sleeve body 131 at the position of the first space 1331.

[0100] The outer side wall of the sleeve body 131 has a recess 1314, when the sleeve body 131 extends into the third channel 114, the recess 1314 and the inner side wall of the third channel 114 form a closed second space 1332. The second communication hole 1142 is in communication with the second space 1332, and another part of the air hole 1312 is formed on the sleeve body 131 at the position of the second space 1332.

[0101] It should be noted that in the present embodiment, the meaning of the airtightness mentioned above is that the first space 1331 is not communicated with the second space 1332 except the vent hole 1312. By the arrangement of the first space 1331 and the second space 1332, the flow direction of the air flow can be optimized, and a better dust removal effect can be achieved.

[0102] Please continue to refer to Figures 26 to 37 The clamp assembly 20 comprises a power source 21, a mounting base 22, a clamp lock 23, two clamp bodies 24 and a clamp mounting block 25. The clamp mounting block 25 can be fixed on the gun head body 11. The clamp lock 23 is slidably arranged in the mounting base 22. The clamp bodies 24 are swingably arranged on the clamp mounting block 25. The clamp lock 23 is formed with a long strip-shaped sliding groove 231, and the long strip-shaped sliding groove 231 and the sliding direction of the clamp lock 23 on the mounting base 22 form a non-zero angle. The clamp mounting block 25 is formed with a sixth passage 251 corresponding to the first passage 112. The clamp bodies 24 are extended into the sliding groove 231 through a second connecting shaft 241, and the second connecting shaft 241 can slide in the sliding groove 231. The power source 21 drives the clamp lock 23 to slide in the mounting base 22, and drives the two clamp bodies 24 to swing relative to the clamp mounting block 25 through the sliding groove 231. In order to switch between the open and clamping positions.

[0103] When the screw enters the clamp assembly 20 through the first passage 112, the power source 21 drives the clamp lock 23 to slide in the mounting base 22. Because the sliding groove 231 on the clamp lock 23 and the sliding direction of the clamp lock 23 form an angle. Therefore, in the process of movement of the clamp lock 23, the sliding groove 231 drives the second connecting shaft 241 to move, so as to change the position of the second connecting shaft 241. The change of the position of the second connecting shaft 241 drives the clamp bodies 24 to swing relative to the clamp mounting block 25, and then changes the distance between the two clamp bodies 24, so as to clamp or release the screw.

[0104] Further, the two sliding grooves 231 are arranged in axial symmetry, and the clamp lock 23 moves in the mounting base 22 along a straight line where the axes of symmetry of the two sliding grooves 231 are located.

[0105] Further, the mounting base 22 is provided with a clamp sliding groove 221 and a through groove 222, and the clamp lock 23 is slidably arranged in the clamp sliding groove 221. The power source 21 can be a pneumatic cylinder, which is fixed on the mounting base 22, and the output end of the pneumatic cylinder is connected with the clamp lock 23 after passing through the through groove 222.

[0106] The clamp mounting block 25 is directly fixed to the end of the gun head body 11 away from the sleeve body 131. On both sides of the clamp mounting block 25, clamp mounting slots 252 are arranged, and the clamp body 24 is swingably arranged in the clamp mounting slots 252 through a hinge pin.

[0107] On the clamp body 24, two oppositely arranged clamping portions 242 are further arranged to clamp the screw in the closed state of the clamp assembly 20.

[0108] Please continue to refer to Figures 1 to 3 , and Figures 38 to 42 In the present embodiment, the cap recognition cylinder 41 and the stroke cylinder 42 are arranged side by side along the width direction of the device on the fourth support base 54 and below the screwdriver body 31. By arranging the two cylinders side by side and connecting the fourth support base to the third support base after passing through the fourth support base, the length (i.e., the distance in the left-right direction) of the entire tightening device can be shortened, and the space occupied by the device can be reduced. Further, since the two cylinders are below the screwdriver body 31, the cap recognition cylinder 41, the stroke cylinder 42, and the screwdriver body 31 are arranged in a triangular shape from the end surface of the device, which further shortens the width (i.e., the distance in the up-down direction) of the entire tightening device and further reduces the space occupied by the device. Figure 2 Figure 2

[0109] Further, along the axis direction of the vacuum tube 61, the cap recognition cylinder 41 and the stroke cylinder 42 are symmetrically arranged on the fourth support base 54 about the vertical plane of the axis of the vacuum tube 61. It needs to be explained that the above-mentioned symmetry refers to the distance between the fixed point of the cap recognition cylinder 41 on the fourth support base 54 to the vertical plane of the axis of the vacuum tube 61 and the distance between the fixed point of the stroke cylinder 42 on the fourth support base 54 to the vertical plane of the axis of the vacuum tube 61 in the width direction (i.e., the up-down direction of Figure 2

[0110] Between the third support base 53 and the second support base 52, a driving structure 43 is arranged. When the cap recognition cylinder 41 and / or the stroke cylinder 42 pushes the third support base 53, the third support base 53 drives the second support base 52 to move in the direction of the gun head assembly 10, i.e., the direction of the first support base 51, through the driving structure 43.

[0111] In the present embodiment, the driving structure 43 can include a second elastic member 431, such as a spring, arranged between the second support base 52 and the third support base 53.

[0112] ​​​One end of the vacuum tube 61 is fixed on the second support base 52, and the other end extends into the gun head assembly 10, specifically the second passage 113 of the gun head body 11, along the axis of the vacuum tube 61. One end of the bit 32 is connected to the screwdriver body 31, and the other end extends into the vacuum tube 61 from the end of the vacuum tube 61 away from the gun head assembly 10 along the axis of the bit 32.

[0113] When the clamp assembly 20 finishes clamping the screw, the cap recognition and screwing operation can be performed. Specifically, the cap recognition cylinder 41 can be started first, and the third support base 53 is driven to move by the first extension rod of the cap recognition cylinder 41. The third support base 53 drives the second support base 52 to move by the second elastic member 431. At this time, the second elastic member 431 is not compressed, or the compression amount can be ignored. The screwdriver body 31, the bit 32 and the vacuum tube 61 can move synchronously. The second support base 52 drives the vacuum tube 61 to pass through the second passage 113, the fifth passage 1222 and the first passage 112 (at this time, the slider body 122 is located at the second position) in sequence. At this time, the vacuum device connected to the vacuum tube 61 can be started to perform vacuumization on the vacuum tube 61, so as to adsorb the screw on the end of the vacuum tube 61 extending into the gun head assembly 10.

[0114] The cap recognition cylinder 41 continues to work, and the third support base 53 continues to move forward at the same time. Meanwhile, the clamp assembly 20 releases the clamping of the screw, the vacuum tube 61 drives the screw to move out, and the screw is placed at a position corresponding to the screw hole to be tightened.

[0115] When the vacuum tube 61 drives the screw to move to the position, the cap recognition cylinder 41 stops working, and the stroke cylinder 42 starts to work to continue driving the third support base 53 to move towards the second support base 52. At this time, since the second support base 52 abuts against the first support base 51, the second extension rod of the stroke cylinder 42 will only drive the third support base 53 to move towards the position of the gun head body 11, and the second elastic member 431 is compressed. Correspondingly, the bit 32 moves in the vacuum tube 61. When the end of the bit 32 extending into the vacuum tube 61 contacts the screw, the screwdriver body 31 is started to drive the bit 32 to rotate, so as to complete the tightening of the screw.

[0116] After completing the entire cap recognition and tightening process, the cap recognition cylinder 41, the stroke cylinder 42, the second support base 52 and the third support base 53 are reset to start the next operation.

[0117] That is, in the embodiment, the cap recognition cylinder 41 and the stroke cylinder 42 are both applied to the same structure, that is, the third support base 53, to exert power to complete the cap recognition and tightening process. The error of the cap recognition cylinder 41 on the stroke of the third support base 53 will not be accumulated to the movement of the stroke cylinder 42. The driving mode can more accurately control the stroke of each structure to prevent the accumulation of errors.

[0118] In the embodiment, in order to more accurately move the screw to the position corresponding to the screw hole to be tightened through the vacuum tube 61, a limiting column 511 is arranged on the first support base 51, one end of the limiting column 511 is connected with the first support base 51, and the other end extends to the direction where the second support base 52 is located. By adjusting the length of the limiting column 511, the stroke of the vacuum tube 61 can be controlled. When the second support base 52 abuts against the end surface of the limiting column 511, it means that the position of the screw at this time corresponds to the position of the screw hole to be tightened.

[0119] In other embodiments, the position of the entire tightening device can also be fixed, and the position between the first support base 51 and the second support base 52 is limited. When the second support base 52 abuts against the first support base 51 in the movement, the vacuum tube 61 drives the screw to move to the position corresponding to the screw hole to be tightened, so as to accurately position the placement position of the screw.

[0120] In order to facilitate the reset of the above-mentioned structures, in the embodiment, one end of the first telescopic rod of the cap recognizing cylinder 41 towards the third support base 53 or one end of the second telescopic rod of the stroke cylinder 42 towards the third support base 53 is fixedly connected with the third support base 53.

[0121] In the embodiment, one end of the second telescopic rod of the stroke cylinder 42 towards the third support base 53 is fixedly connected with the third support base 53, that is, the reset of the second telescopic rod drives the reset of the third support base 53, and then drives the reset of the second support base 52, the chuck 32 and the vacuum tube 61. After the cap recognizing cylinder 41 moves to the position and the stroke cylinder 42 starts to work, the first telescopic rod of the cap recognizing cylinder 41 can be separated from the third support base 53. After the stroke cylinder 42 is reset, the cap recognizing cylinder 41 abuts against the third support base 53 again.

[0122] Further, a guide column 432 is arranged between the third support base 53 and the second support base 52, the second elastic member 431 is sleeved on the guide column 432, a guide channel 521 is formed on the second support base 52, one end of the guide column 432 is fixed on the third support base 53, and the other end extends into the guide channel 521 along the axis direction of the guide column 432. When the second support base 52 abuts against the first support base 51, and the third support base 53 continues to move, the guide column 432 can move in the guide channel 521, so as to prevent the relative shaking between the third support base 53 and the second support base 52, and make the chuck 32 more accurately tighten the screw.

[0123] Further, please continue to refer to Figures 40 to 42A positioning bushing 62 is arranged on the second support base 52, and one end of the vacuum tube 61 towards the second support base 52 is fixed to the second support base 52 through the positioning bushing 62. An O-ring 63 is further arranged on the outer side of the positioning bushing 62. In the embodiment, one O-ring 63 can be arranged on the positioning bushing 62.

[0124] A guide bushing 64 is arranged on the first support base 51, and the guide bushing 64 is fixedly installed in a mounting joint 65 fixed to the first support base 51 and extending into the gun head body 11 of the gun head assembly 10. One end of the vacuum tube 61 towards the first support base 51 movably extends into the guide bushing 64 along the axis direction of the vacuum tube 61, and an O-ring 63 is also arranged on the outer side of the guide bushing 64. In the embodiment, two O-rings 63 can be arranged on the guide bushing 64.

[0125] Through the design of the positioning bushing 62, the guide bushing 64 and the O-rings 63, the vacuum tube 61 can float. In actual production, because the lengths of the vacuum tube 61 and the batch head 32 are relatively long, a certain vibration will be generated in the working process of the cap recognizing cylinder 41 and the stroke cylinder 42, and the batch head 32 will shake due to the gravity. The shaking will cause a deviation between the vacuum tube 61 and the screw hole to be tightened, and between the screw and the screw hole to be tightened, and affect the accuracy of the screw tightening. Through the floating design, the deviation between the center of the screw and the center of the screw hole can be compensated by the floating of the vacuum tube 61. When the axis of the vacuum tube 61 deviates, the positioning bushing 62 and the guide bushing 64 will also move, and the O-rings 63 will also deform, so as to reset the vacuum tube 61.

[0126] The second support base 52 is further provided with a connecting block 522, and the positioning bushing 62 is installed in the connecting block 522. The connecting block 522 is further provided with a vacuum joint 523 connected with the vacuum tube 61.

[0127] In summary, in the present application, the slider structure 12 is arranged in the gun head body 11, so that the gun head assembly 10 can change the communication state between the multiple channels in the gun head assembly 10 through the switching of the position of the slider body 122, and then complete the screw feeding operation. This cancels the arrangement of the swing arm, changes the screw feeding structure, reduces the beat, avoids the collision between the vacuum tube 61 and the swing arm, does not generate metal chips, and ensures the cleanliness of the screw feeding link.

[0128] Further, through the setting of the locking block 132 in the feeding sleeve 13 and the setting of the mounting mode of the sleeve body 131, the locking block 132 can fix the sleeve body 131, and when the sleeve body 131 is replaced, the locking block 132 is moved, and then the sleeve body 131 can be taken out. This can more simply replace the sleeve body 131, save time cost, and improve production efficiency.

[0129] Further, through the parallel setting of the two air cylinders and the setting of the air cylinders below the screwdriver body 31, the length and width of the whole tightening device can be shortened, and the space occupied by the device is reduced. Through the movement mode of the second support seat 52, the third support seat 53 and the driving assembly 40 relative to each other, the error accumulation generated during movement is reduced, and the accuracy during screw tightening is ensured.

[0130] The above is only an example and description of the structure of the utility model, and those skilled in the art can make various modifications or supplements or adopt similar ways to replace the described specific embodiments, as long as the modifications or supplements do not deviate from the structure of the utility model or exceed the range defined by the claims, and belong to the protection range of the utility model.

Claims

1. A tightening device, characterized by: The application relates to a screwdriver device, which comprises a gun head assembly, a screwdriver assembly, a driving assembly, a base and a vacuum tube, the gun head assembly is arranged on the base, a second supporting seat and a third supporting seat are slidably arranged on the base, one end of the vacuum tube is fixedly connected with the second supporting seat, the other end of the vacuum tube is movably extended into the gun head assembly along the axis direction of the vacuum tube, the screwdriver assembly comprises a screwdriver body and a bit, the screwdriver body is arranged on the third supporting seat, one end of the bit is connected with the screwdriver body, and the other end of the bit is slidably extended into the vacuum tube along the axis direction of the bit, the driving assembly comprises a cap recognizing cylinder and a stroke cylinder, the cap recognizing cylinder and the stroke cylinder are fixed on the base, a first telescopic rod of the cap recognizing cylinder and a second telescopic rod of the stroke cylinder are connected with the third supporting seat, so that the third supporting seat is driven to slide on the base, and the third supporting seat drives the second supporting seat to slide on the base.

2. A tightening device according to claim 1, characterized in that: A fourth supporting seat is fixedly arranged on the base, the cap recognizing cylinder and the stroke cylinder are arranged on the fourth supporting seat in parallel along the width direction of the screwdriver device and below the screwdriver body.

3. A tightening device according to claim 2, characterized in that: The cap recognizing cylinder and the stroke cylinder are symmetrically arranged on the fourth supporting seat about the vertical plane of the axis of the vacuum tube.

4. A tightening device according to claim 2, characterized in that: A driving structure is arranged between the third supporting seat and the fourth supporting seat, when the cap recognizing cylinder and / or the stroke cylinder pushes the third supporting seat, the third supporting seat drives the second supporting seat to move towards the direction of the gun head assembly through the driving structure.

5. A tightening device according to claim 4, characterized in that: The driving structure comprises a second elastic member, the second elastic member is arranged between the second supporting seat and the third supporting seat.

6. A tightening device according to claim 5, characterized in that: A guide column is further arranged between the third supporting seat and the second supporting seat, the second elastic member is sleeved on the guide column, a guide channel is formed on the second supporting seat, one end of the guide column is fixed on the third supporting seat, and the other end of the guide column is movably extended into the guide channel along the axis direction of the guide column.

7. A tightening device according to claim 4, characterized in that: The gun head assembly is fixed on the base through a first supporting seat, a limiting column is arranged on the first supporting seat, one end of the limiting column is connected with the first supporting seat, and the other end of the limiting column extends towards the direction of the second supporting seat, the length of the limiting column is adjusted to control the stroke of the vacuum tube.

8. A tightening device according to claim 7, characterized in that: A positioning bushing is arranged on the second supporting seat, one end of the vacuum tube towards the second supporting seat is fixed on the second supporting seat through the positioning bushing, a guide bushing is arranged on the first supporting seat, the guide bushing is fixed on the gun head assembly, and one end of the vacuum tube towards the first supporting seat is movably extended into the guide bushing along the axis direction of the vacuum tube.

9. A tightening device according to claim 8, characterized in that: O-rings are arranged on the positioning bushing and the guide bushing.

10. A tightening device according to claim 4, characterized in that: One end of the first telescopic rod of the cap recognizing cylinder towards the third supporting seat or one end of the second telescopic rod of the stroke cylinder towards the third supporting seat is fixedly connected with the third supporting seat.

Images