Automobile hub fixing nut assembling device

Abstract

The invention relates to the field of automobile assembling, in particular to an automobile hub fixing nut assembling device which is characterized in that an air cylinder part is mounted on the upper portion of a machine tool through a mounting frame, a plurality of nut assembling mechanisms are mounted at the telescopic end of the air cylinder part through a supporting arm, and a limiting seat used for assembling a workpiece is arranged at the bottom of the mounting frame; and a bolt assembling rod is arranged on the limiting seat and is used for placing a fastener. According to the device, the nut piece in the fastening sleeve moves downwards through the air cylinder piece and is in butt joint with the bolt piece on the workpiece, when the nut piece makes contact with the bolt piece, the nut piece extrudes the finger-shaped block and excites the pneumatic block to rotate so as to drive the fastening sleeve to rotate and fasten, and when the fastening sleeve is fastened to a certain torsion, the fastening piece and the workpiece are not prevented from being damaged; the blade plate arranged on the outer side of the pneumatic block deflects under the action of air pressure, the copper contact piece mechanism is excited to stop air pumping, then single-time fastening operation is completed, the mechanism does not need to manually fasten bolts for multiple times, a fastener does not need to be limited with the help of a tool, and the assembly efficiency is effectively improved.

Description

Technical Field

[0001] The invention relates to the technical field of automobile assembly, and in particular to an automobile wheel hub fixing nut assembly device. Background Art

[0002] The automobile assembly line is the last step in automobile production, which includes the assembly of automobile rims. In this process, since some rims and spokes are separated, it is necessary to connect the spokes to the rims with nuts and bolts, and use a torque wrench to tighten them according to the corresponding torque value.

[0003] Since split rims are generally suitable for large and heavy-loaded vehicles, when assembling them manually, it is not only necessary to hold the heavier hub parts and spokes, but also necessary to manually align the fasteners to complete the installation. Moreover, since a wheel hub is provided with multiple fastening holes, it is necessary to manually repeat the steps of aligning, fastening and moving, which is inefficient and time-consuming and labor-intensive. Summary of the invention

[0004] The purpose of the present invention is to solve the shortcomings of the prior art and to propose an automobile wheel hub fixing nut assembly device.

[0005] In order to achieve the above object, the present invention adopts the following technical solutions: An automobile wheel hub fixing nut assembly device comprises a machine tool, a cylinder part is mounted on the upper part of the machine tool through a mounting frame, and a plurality of nut assembly mechanisms are mounted on the telescopic end of the cylinder part through a supporting arm; The bottom of the mounting frame is provided with a limit seat for assembling workpieces, and the limit seat is provided with a bolt assembly rod for placing fasteners; The nut assembly mechanism comprises an assembly cylinder, a lifting cylinder is slidably mounted on the upper inner wall of the assembly cylinder, and a connecting cylinder is slidably sleeved on the bottom, a fastening sleeve driven to rotate by a pneumatic block is mounted on the inner wall of the connecting cylinder, a pair of finger-shaped blocks are limitedly slidably mounted on the inner wall of the fastening sleeve, the finger-shaped blocks are deflected by a pin shaft member 2, and a copper contact piece 1 is provided on the upper wall of the finger-shaped block, the copper contact piece 1 is electrically connected to a copper contact point 1 arranged above it, and the copper contact point 1 is electrically connected to a brush member 1 and a conductive ring 1 in sequence through a wire to realize circuit connection; The outer side of the pneumatic block is slidingly limited with a plurality of blades, which are deflected by a limit pin arranged at one end of the blade, and a V-shaped elastic strip is installed on the limit pin, one side of the V-shaped elastic strip is in compression contact with the second copper contact piece, and when the blade is deflected, the second copper contact piece is squeezed and deformed to stimulate the second copper contact.

[0006] In addition, a preferred structure is that a guide frame for assembling a workpiece is provided on one side of the machine tool.

[0007] In addition, a preferred structure is that the assembly cylinder is installed on the support arm through a mounting block, and a nut feeding pipe is installed on one side of the upper part of the assembly cylinder through an arc hose, and one end of the arc hose is connected to the inside of the assembly cylinder.

[0008] In addition, a preferred structure is that a pneumatic cabin is installed in the middle of the assembly cylinder, a pneumatic block is arranged in the pneumatic cabin, the pneumatic block is connected to the fastening sleeve, and the middle part of the pneumatic block is rotatably installed inside the assembly cylinder through a bearing member; An air receiving nozzle is arranged on one side of the pneumatic cabin, and an air inlet end of the air receiving nozzle is connected to an external air source mechanism through a connecting pipe.

[0009] In addition, a preferred structure is that a positioning head is provided at the bottom of the assembly cylinder, the positioning head is used to position the mounting hole, and a pair of mounting grooves are symmetrically opened on the inner wall of the bottom end of the positioning head, and limiting beads are installed in the mounting grooves, one side of the limiting beads is in compression contact with the elastic spring, and the bottom end of the elastic spring extends out of the bottom wall of the positioning head.

[0010] In addition, the preferred structure is that the lifting cylinder is limitedly slidably installed on the upper inner wall of the assembly cylinder, and the common side of the lifting cylinder and the assembly cylinder is respectively provided with a second feed port and a first feed port, and in a natural state, the openings of the second feed port and the first feed port are staggered, and one end of the first feed port is connected to the arc hose; The lifting cylinder and the assembly cylinder are connected by a return spring, and in a natural state, a certain gap is left between the bottom wall of the lifting cylinder and the top wall of the connecting cylinder; The inner wall of the lifting cylinder is rotatably installed with a clamping plate through a pin shaft part and a torsion spring part, the bottom end of the clamping plate exceeds the bottom wall of the lifting cylinder, and a magnetic block is installed on the outer side of the bottom of the clamping plate, and the magnetic block is magnetically connected with the magnetic block arranged on the upper wall of the connecting cylinder.

[0011] In addition, a preferred structure is that an upper extension guide cylinder is provided at the upper end of the fastening sleeve, the interior of the upper extension guide cylinder gradually expands outward from bottom to top, and the bottom opening corresponds to and overlaps with the top opening of the fastening sleeve.

[0012] In addition, the preferred structure is that one end of the finger-shaped block is slidably installed at the inner wall notch of a limiting groove opened on the inner wall of the fastening sleeve through a pin shaft component 2, and the finger-shaped block can be deflected around the pin shaft component 2, and the two ends of the pin shaft component 2 are connected to the limiting groove 1 through a spring component 1.

[0013] In addition, a preferred structure is that a pair of slots are symmetrically opened on the middle wall of the connecting tube, and a conductive ring 1 and a conductive ring 2 are respectively installed in the slots. The conductive ring 1 is electrically connected to the brush piece 1 and the copper contact 1 in sequence, and the conductive ring 2 is electrically connected to the brush piece 2 and the copper contact 2 in sequence.

[0014] In addition, the preferred structure is that the outer wall of the pneumatic block is provided with a plurality of sliding grooves for assembling the blade, a limit pin is provided at one end of the blade, and limit blocks are provided at the upper and lower ends of the blade, and the limit pin and the limit block are slidably installed in the notches provided at the top and bottom walls of the sliding groove; The inner wall of the sliding groove is provided with a pair of shallow grooves symmetrically arranged in upper and lower directions, the shallow grooves are used to limit the V-shaped elastic strip, and a copper contact piece 2 is obliquely installed at one end of the shallow groove, and a copper contact point 2 is arranged on the side away from the copper contact piece 2.

[0015] The beneficial effects of the present invention are: In the present invention, the nut member in the tightening sleeve descends through the cylinder member and docks with the bolt member on the workpiece, and when the nut member contacts the bolt member, the nut member squeezes the finger block and stimulates the pneumatic block to rotate, so as to drive the tightening sleeve to rotate and tighten, and when tightened to a certain torque, damage to the fastener and the workpiece cannot be avoided. The blade plate arranged on the outside of the pneumatic block is deflected by the air pressure, and thereby stimulates the copper contact mechanism to stop pumping air, thereby completing a single tightening operation. This mechanism does not require manual tightening of bolts multiple times, and does not require the use of tools to limit the fasteners, thereby effectively improving assembly efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a schematic diagram of the overall external structure of a machine tool for assembling a fixing nut for a wheel hub of an automobile proposed by the present invention; Figure 2 A schematic diagram of the partial structure of the nut assembly device proposed by the present invention; Figure 3 A schematic diagram of the nut assembly mechanism proposed by the present invention; Figure 4 This is a schematic diagram of the external structure of the assembly tube proposed by the present invention; Figure 5 A cross-sectional view of the internal structure of the assembly tube proposed by the present invention; Figure 6 This is a schematic diagram of the docking assembly of the positioning head proposed by the present invention; Figure 7 This is an exploded schematic diagram of the lifting cylinder installation structure proposed by the present invention; Figure 8 This is an exploded schematic diagram of the clamping plate installation structure proposed by the present invention; Fig. 9 This is a cross-sectional view of the internal structure of the connecting tube proposed by the present invention; Fig.10 This is a schematic diagram of the finger block installation structure proposed by the present invention; Fig.11 This is a schematic diagram of the position relationship between the clamping plate and the connecting tube proposed by the present invention; Fig.12 This is a schematic diagram of the installation structure of the limit bead proposed in the present invention; Fig.13 This is a schematic diagram of the limit seat structure proposed by the present invention; Fig.14 This is a schematic diagram of the pneumatic block connection structure proposed by the present invention; Fig.15 This is a schematic diagram of the blade installation structure proposed by the present invention; Fig.16 This is a schematic diagram of the internal structure of the blade installation proposed by the present invention; Fig.17 This is a schematic diagram of the second installation structure of the copper contact piece proposed by the present invention.

[0017] In the figure: 1, machine tool; 101, limit seat; 2, mounting frame; 3, cylinder part; 4, guide frame; 5, bolt assembly rod; 6, rim part; 61, spoke cover; 7, support arm; 71, mounting block; 8, assembly cylinder; 81, feed port 1; 9, nut feeding pipe; 10, pneumatic cabin; 11, positioning head; 12, air nozzle; 13, connecting pipe; 14, arc hose; 15, fastening sleeve; 151, upper extension guide cylinder; 16, limit bead; 161, elastic spring; 162, mounting groove; 17, clamping plate; 171, magnetic block; 172, pin shaft part 1; 173, torsion spring part 1 ;18. Connecting cylinder;19. Reset spring;20. Lifting cylinder;201. Feed port 2;21. Pneumatic block;22. Finger block;221. Spring component 1;222. Pin component 2;223. Copper contact piece 1;23. Annular groove;24. Magnetic block;25. Brush component 1;26. Conductive ring 1;27. Copper contact 1;28. Bearing component;29. Limiting groove 1;30. Blade;31. Limiting pin;32. Sliding groove;33. Limiting block;34. V-shaped elastic strip;35. Brush component 2;36. Shallow groove;37. Copper contact piece 2;38. Copper contact 2;39. Conductive ring 2. DETAILED DESCRIPTION

[0018] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0019] Reference Figure 1-4 , Fig.13 A device for assembling a nut for fixing a wheel hub of an automobile comprises a machine tool 1. A cylinder part 3 is assembled on one side of the upper part of the machine tool 1 through a mounting frame 2. A telescopic rod of the cylinder part 3 extends downward to the middle of the mounting frame 2, and a plurality of groups of support arms 7 are mounted on the rod heads of the telescopic rods. An annular support part is mounted on the outer side of the support arm 7 to improve the overall mechanical strength, and a nut assembly mechanism is correspondingly mounted on one end of the outer side of each support arm 7.

[0020] Among them, a window is opened on one side of the upper part of the machine tool 1, and a guide frame 4 is installed at the window. The guide frame 4 is used to guide and introduce the unprocessed rim part 6, wherein the rim part 6 to be processed is assembled on the limit seat 101 directly below the mounting frame 2, and a plurality of bolt assembly rods 5 are arranged on the limit seat 101, and the bolt assembly rods 5 are equipped with fastening bolts for installation, wherein the bolt assembly rods 5 are limited by the bolt head.

[0021] Furthermore, the nut assembly mechanism is integrally assembled on the support arm 7 by the mounting block 71, and the nut assembly mechanism includes an assembly cylinder 8 as a main body, the assembly cylinder 8 is connected to the support arm 7 through the mounting block 71, and the upper side of the assembly cylinder 8 is connected to the nut feeding pipe 9 through an arc hose 14, and a supporting steel bar is provided on the outer side of the arc hose 14 to ensure support, and a nut part is assembled in the nut feeding pipe 9, and the nut part is guided into the interior of the assembly cylinder 8 through the arc hose 14 for feeding.

[0022] A pneumatic cabin 10 is provided at the bottom of the assembly cylinder 8, and a gas nozzle 12 is installed on one side of the pneumatic cabin 10. The air inlet end of the gas nozzle 12 is connected to an external air source mechanism through a connecting pipe 13, so as to introduce compressed gas.

[0023] A positioning head 11 is installed at the bottom of the pneumatic cabin 10 , and the positioning head 11 is used to connect with the mounting hole of the spoke cover 61 to ensure assembly accuracy.

[0024] Reference Figure 5-9 , Fig.11 A connecting tube 18 is sleeved on the inner side of the bottom of the assembly tube 8. The connecting tube 18 can slide up and down on the inner wall of the assembly tube 8, and a pneumatic cabin 10 is arranged in the middle of the connecting tube 18, and a pneumatic block 21 is arranged in the pneumatic cabin 10.

[0025] A lifting cylinder 20 is arranged above the connecting cylinder 18 . The lifting cylinder 20 is slidably mounted on the inner wall of the assembling cylinder 8 . In a natural state, a certain distance is left between the upper wall of the connecting cylinder 18 and the bottom wall of the lifting cylinder 20 .

[0026] Among them, the top wall of the lifting cylinder 20 and the assembly cylinder 8 are connected by a reset spring 19, and the common side of the lifting cylinder 20 and the assembly cylinder 8 is respectively provided with a feed port 201 and a feed port 1 81, and in a natural state, under the connecting support of the reset spring 19, the feed port 201 and the feed port 1 81 are staggered to prevent the nut from entering the assembly cylinder 8.

[0027] Furthermore, a pair of inwardly inclined clamps 17 are symmetrically arranged on the inner wall of the lifting cylinder 20, and the upper ends of the clamps 17 are rotatably installed on the cylinder wall through a pin shaft member 172, and a torsion spring member 173 is arranged at the rotating connection of the pin shaft member 172. The torsion spring member 173 synchronizes the clamps 17 to generate a torsional force deflected toward the center of the lifting cylinder 20, thereby clamping and limiting the nut member.

[0028] Furthermore, a pair of magnetic blocks 24 are symmetrically mounted on the outer wall of the connecting tube 18 , and an annular groove 23 is formed on the outer wall of the connecting tube 18 for docking with the sliding assembly tube 8 .

[0029] Among them, a fastening sleeve 15 is rotatably installed inside the connecting cylinder 18, one side of the fastening sleeve 15 is connected to the pneumatic block 21, and is driven to rotate synchronously with the pneumatic block 21, and the upper wall of the fastening sleeve 15 is connected with an upper extension guide cylinder 151, the inner wall of the upper extension guide cylinder 151 expands outward from bottom to top, and the whole is an inverted cone shape, and is connected with the fastening sleeve 15 to provide a hexagonal groove to guide and limit the nut.

[0030] Furthermore, the upper end of the connecting tube 18 extends to a point at the bottom of the clamp 17, and a magnetic block 171 is provided at the bottom of the clamp 17 to magnetically connect with the magnetic block 24 provided on the connecting tube 18, and in a natural state, the magnetic block 24 is located obliquely below the magnetic block 171 and no magnetic force is generated between the two.

[0031] Reference Figure 9-10 A pair of limiting grooves 29 are symmetrically provided on both sides of the inner wall of the fastening sleeve 15. A finger block 22 is rotatably installed in the limiting groove 29 through a pin shaft 222. The upper part of the finger block 22 is set as an inclined surface, and the bottom is set as a flat bottom.

[0032] Among them, the upper end of the finger-shaped block 22 is limited and slid on the inner wall of the limiting groove 29 through the second pin shaft member 222, and a spring member 221 is connected between the limiting groove 29 and the second pin shaft member 222. The spring member 221 is used to tighten and reset the finger-shaped block 22 as a whole.

[0033] Furthermore, the finger block 22 can be deflected to a certain extent and slide up and down. A copper contact piece 223 is provided on the upper wall of the finger block 22. A copper contact point 27 is provided on the groove wall above the copper contact piece 223, and the copper contact point 27 is electrically connected to the brush member 25 through a wire. The brush member 25 is provided with positive and negative poles, and a conductive ring 26 is provided on the side away from the brush member 25. The conductive ring 26 is assembled on one side of the inner wall of the connecting tube 18 and is electrically contacted and connected with the brush member 25, wherein the conductive ring 26 is electrically connected to the machine tool 1 by a wire.

[0034] The brush member 25 rotates synchronously with the fastening sleeve 15 .

[0035] Reference Fig.12 , mounting grooves 162 are symmetrically provided on both sides of the inner wall of the positioning head 11, and a limiting bead 16 is set inside the mounting groove 162 for limiting the position. The diameter of the limiting bead 16 is slightly larger than the outer groove of the mounting groove 162, and an elastic spring leaf 161 is installed on one side of the inner wall of the mounting groove 162. The elastic spring leaf 161 is slightly arc-shaped, and its bottom end extends out of the bottom wall of the positioning head 11.

[0036] In the natural state, the elastic spring 161 contacts the outer wall of the limiting bead 16 to limit the limiting bead 16, and when the bottom of the elastic spring 161 is squeezed and deformed, the elastic spring 161 is deformed and bent as a whole. At this time, there is a gap between the limiting bead 16 and the elastic spring 161 to ensure the free movement of the limiting bead 16.

[0037] Reference Fig. 9 , Figure 14-17 The pneumatic block 21 is connected to the fastening sleeve 15 and is rotatably installed in the middle of the connecting tube 18 through the bearing 28, wherein the pneumatic block 21 is rotatably set in the internal chamber of the pneumatic cabin 10, and the inner wall chamber of the pneumatic cabin 10 is eccentrically set to the pneumatic block 21, that is, one side of the outer wall of the pneumatic block 21 is tangent to the inner wall of the cavity, and a gap is left on the other side, and at the same time, the chamber on the side with the gap is directly connected to the air nozzle 12 and is tangent to the air intake direction.

[0038] Furthermore, a plurality of sliding grooves 32 are provided inside the pneumatic block 21 to slideably assemble the vane 30 , and a limit pin 31 is installed on one side of the vane 30 , and a limit block 33 is installed on the top and bottom sides of the sliding groove 32 to slide in a limited manner.

[0039] A pair of V-shaped elastic strips 34 are symmetrically mounted in the middle of the limiting pin 31 . The V-shaped elastic strips 34 extend toward the inner walls on both sides of the sliding groove 32 and are in compression contact with the inner walls.

[0040] A shallow groove 36 is provided on one side of the upper portion of the sliding groove 32 . The shallow groove 36 is connected to the V-shaped elastic strip 34 . A second copper contact piece 37 is obliquely installed on one side of the shallow groove 36 . The second copper contact piece 37 is deformed and tilted by being squeezed by the V-shaped elastic strip 34 .

[0041] A copper contact 2 38 is provided on the side away from the copper contact piece 2 37. The copper contact 2 38 is provided in the shallow groove 36 and is electrically connected to the brush piece 2 35 through a wire. The brush piece 2 35 is assembled on the inner side of the pneumatic block 21. Conversely, a conductive ring 2 39 is assembled on one side of the inner wall of the connecting tube 18 and is electrically connected to the brush piece 2 35.

[0042] Among them, notches are opened symmetrically on both sides of the middle wall of the connecting tube 18, and a conductive ring 1 26 and a conductive ring 2 39 are respectively arranged at the notches to electrically connect the brush member 1 25 and the brush member 2 35.

[0043] In this embodiment, the rim part 6 is assembled on the limit seat 101 on the upper part of the machine tool 1 for temporary fixation, and its threaded mounting hole is connected with each bolt assembly rod 5, so that the bolt part placed on the upper part of the bolt assembly rod 5 is inserted into the mounting hole, and the boss arranged on the limit seat 101 can limit the inner wall of the rim part 6.

[0044] Then, the spoke cover 61 is assembled to the rim part 6 accordingly, and a bolt part is inserted into each mounting hole. Then, the machine tool 1 controls the cylinder part 3 to extend to drive the support arm 7 to move downward as a whole. At this time, the nut assembly mechanism moves downward, and the positioning head 11 therein is gradually inserted into the mounting hole of the spoke cover 61. At the same time, the bolt end in the mounting hole presses the nut part set on the positioning head 11, so that the nut part slides upward on the inner wall of the fastening sleeve 15.

[0045] At this time, the nut piece is subjected to the upward force and moves upward from the limiting bead 16 at the bottom of the positioning head 11. The top wall of the nut piece presses against the bottom wall of the finger block 22 arranged on the inner wall of the fastening sleeve 15. The finger block 22 is pressed upward until the copper contact piece 223 at its top makes electrical contact with the copper contact 27 arranged on the inner wall of the slot. The copper contact 27 feeds back the corresponding electrical signal to the machine tool 1 through the wire, the brush piece 25 and the conductive ring 26. The machine tool 1 receives the corresponding electrical signal to control the external air source mechanism to pump the compressed gas into the pneumatic cabin 10. The pneumatic cabin 10 is provided with a pneumatic block 21 for driving. The pneumatic block 21 is pushed by the compressed gas to synchronously drive the fastening sleeve 15 to rotate, thereby assembling and tightening the nut piece.

[0046] During this process, the cylinder member 3 is still in the extended state, and as the tightening sleeve 15 is rotated and tightened, the nut member gradually moves downward.

[0047] Synchronously, as the cylinder member 3 is gradually extended, the tightening sleeve 15 gradually moves downward, the assembly tube 8 gradually moves downward under the relative force, and the nut member is gradually tightly connected with the bolt member. At this time, the positioning head 11 is completely in contact with the bottom wall of the mounting hole, and the assembly tube 8 sleeved on the outside of the connecting tube 18 moves downward relatively. In this process, the splint 17 installed in the assembly tube 8 through the lifting tube 20 gradually approaches the magnetic block 24 set on the upper wall of the connecting tube 18, and when it is lowered to a certain position, the magnetic block 171 on the outer wall of the splint 17 is adsorbed and fitted with the magnetic block 24. At this time, the splint 17 deflects outward, causing the pre-assembled nut member originally clamped in the middle of the splint 17 to fall downward, and when it is lowered to the end, that is, the connecting tube 18 is completely in contact with the lifting tube 20, the magnetic block 24 passes over the magnetic block 171, and the two are no longer in contact at this time, and the splint 17 is deflected and reset by the torsion spring member 173.

[0048] Synchronized with the splint 17, the distance between the lifting cylinder 20 on the inner wall of the assembly cylinder 8 and the upper wall of the connecting cylinder 18 gradually decreases until they are completely in contact and pressed. The force causes the lifting cylinder 20 to move upward, and the return spring 19 on the upper wall of the lifting cylinder 20 is compressed and deformed. At this time, the feed port 201 and the feed port 1 81 are gradually overlapped from a staggered state, and the nut parts in the nut feeding tube 9 fall into the lifting cylinder 20 and are clamped by the splint 17.

[0049] Among them, it is more generally described that nut parts are provided at the connecting tube 18, the clamping plate 17, and the feed port 81. As the production operation proceeds, the nut parts fall downward in sequence and are fed alternately.

[0050] When the nut falls from the clamping plate 17 to the fastening sleeve 15, the upper extension guide cylinder 151 on the upper part of the fastening sleeve 15 guides and unloads the force, so that the edges and corners are aligned so that the nut can be assembled into the fastening sleeve 15 to complete the loading.

[0051] Among them, it is more summarized that as the cylinder member 3 continues to descend, the nut member presses against the finger block 22 to stimulate the rotation of the fastening sleeve 15. At the same time, the clamping plate 17 opens to allow another nut member to fall to a place on the fastening sleeve 15. At this time, the nut member connected to the bolt member has been tightened. At this time, the cylinder member 3 drives the device upward as a whole, and the nut member that has fallen in the fastening sleeve 15 falls to the bottom of the fastening sleeve 15 and is limited by the limiting bead 16 to wait for the next assembly operation.

[0052] Furthermore, the machine tool 1 controls the external air source mechanism to pump the compressed gas into the pneumatic cabin 10 , and the pneumatic block 21 is driven to rotate by the vane 30 , which is the same as the pneumatic motor, and the pneumatic cabin 10 is provided with corresponding air inlet and outlet ports.

[0053] When the fastening sleeve 15 rotates at high speed to drive the nut to tighten, in order to avoid damage to the fastener and the workpiece due to large torque, when the fastening sleeve 15 reaches a certain torque, the opposing force generated by it is directly transmitted to the pneumatic block 21. At this time, the rotation of the pneumatic block 21 is blocked, and the blade 30 located at the air nozzle 12 is extended by the centrifugal force. The blade 30 is in direct contact with the high-speed compressed gas, and the blade 30 is deflected by the gas pressure. At this time, the blade 30 rotates with the limit pin 31 as the deflection axis. At this time, the V-shaped elastic strip 34 fixed on the limit pin 31 is deformed by deflection, and exerts a force on the copper contact piece 2 37 set at a place in the shallow groove 36, so that it is deformed to contact the copper contact point 2 38. At this time, the circuits between the copper contact 2 38, the copper contact piece 2 37, the wire, the brush piece 2 35, and the conductive ring 2 39 are connected, and the conductive ring 2 39 feeds back the corresponding electrical signal to the machine tool 1. At this time, the machine tool 1 controls the external air source mechanism to stop pumping air, and the cylinder part 3 moves upward, thereby completing the assembly of a single hub part.

[0054] In actual application, the V-shaped elastic strip 34 enables the blade 30 to reset itself after deflection, and in the normal tightening process, the deflection angle of the blade 30 is insufficient to cause the second copper contact piece 37 to deform.

[0055] Due to the setting of the limiting block 33 , when the blade 30 does not extend out of the outer wall of the pneumatic block 21 , the limiting block 33 restricts the blade 30 from deflecting left and right.

[0056] In actual application, when the positioning head 11 contacts the mounting hole of the spoke cover 61, the elastic spring 161 at the bottom of the positioning head 11 is squeezed upward and bends to a certain extent, so that the limiting bead 16 has a certain activity space, thereby allowing the nut to pass through.

[0057] In the actual application process, before processing, the corresponding fasteners, such as gaskets, bolts, and nuts, need to be manually placed in corresponding positions.

[0058] In the actual application process, the machine tool 1 is provided with a guide frame 4 for mounting the unprocessed rim part 6 , and the guide frame 4 extends to one side of the limiting seat 101 and facilitates the operator to take the material.

[0059] In actual application, dynamic seals are provided at the connection between the conductive ring and the brush.

[0060] In actual application, an inclined cut surface is provided at the outer notch of the sliding slot 32 to satisfy the small-range deflection of the blade 30 .

[0061] Among them, it is worth noting that the brush parts, copper contacts and conductive ring mechanisms provided in the above-mentioned mechanisms are all provided with corresponding positive and negative poles to achieve circuit connectivity. The specific circuit principles, wiring specifications and operations involved are common knowledge well known to technical personnel in this field and will not be repeated here.

[0062] Among them, it is worth noting that it is still necessary to use corresponding tools such as torque wrenches to tighten the nuts to the specified torque value to ensure mechanical strength.

[0063] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. An automobile wheel hub fixing nut assembly device, comprising a machine tool (1), characterized in that: The upper part of the machine tool (1) is mounted with a cylinder part (3) via a mounting frame (2), and a plurality of nut assembly mechanisms are mounted on the telescopic end of the cylinder part (3) via a support arm (7); A limiting seat (101) for assembling a workpiece is provided at the bottom of the mounting frame (2), and a bolt assembly rod (5) is provided on the limiting seat (101) for placing a fastener; The nut assembly mechanism comprises an assembly cylinder (8), a lifting cylinder (20) is slidably mounted on the upper inner wall of the assembly cylinder (8), and a connecting cylinder (18) is slidably sleeved on the bottom, a fastening sleeve (15) driven to rotate by a pneumatic block (21) is mounted on the inner wall of the connecting cylinder (18), a pair of finger-shaped blocks (22) are limitedly slidably mounted on the inner wall of the fastening sleeve (15), the finger-shaped blocks (22) are deflected by a second pin shaft member (222), and a copper contact piece (223) is provided on the upper wall of the finger-shaped block (22), the copper contact piece (223) is electrically connected to a copper contact point (27) arranged above it, and the copper contact point (27) is electrically connected to a brush member (25) and a conductive ring (26) in sequence through a wire to achieve circuit connection; The outer side of the pneumatic block (21) is provided with a plurality of blades (30) for limiting sliding. The blades (30) are deflected by a limiting pin (31) provided at one end thereof, and a V-shaped elastic strip (34) is installed on the limiting pin (31). One side of the V-shaped elastic strip (34) is in compression contact with the second copper contact piece (37). When the blades (30) are deflected, the second copper contact piece (37) is compressed and deformed to stimulate the second copper contact point (38).

2. The automobile wheel hub fixing nut assembly device according to claim 1, characterized in that: A guide frame (4) for assembling a workpiece is provided on one side of the machine tool (1).

3. The automobile wheel hub fixing nut assembly device according to claim 1, characterized in that: The assembly cylinder (8) is mounted on the support arm (7) via a mounting block (71), and a nut feeding pipe (9) is mounted on one side of the upper portion of the assembly cylinder (8) via an arc-shaped hose (14), one end of the arc-shaped hose (14) being in communication with the interior of the assembly cylinder (8).

4. The automobile wheel hub fixing nut assembly device according to claim 1, characterized in that: A pneumatic cabin (10) is installed in the middle of the assembly cylinder (8), a pneumatic block (21) is arranged in the pneumatic cabin (10), the pneumatic block (21) is connected to the fastening sleeve (15), and the middle of the pneumatic block (21) is rotatably installed in the assembly cylinder (8) via a bearing member (28); An air receiving nozzle (12) is provided on one side of the pneumatic cabin (10), and an air inlet end of the air receiving nozzle (12) is connected to an external air source mechanism via a connecting pipe (13).

5. The automobile wheel hub fixing nut assembly device according to claim 1, characterized in that: A positioning head (11) is provided at the bottom of the assembly cylinder (8), the positioning head (11) being used to position the mounting hole, and a pair of mounting grooves (162) are symmetrically provided on the inner wall of the bottom end of the positioning head (11), and a limiting bead (16) is installed in the mounting groove (162), one side of the limiting bead (16) is in compression contact with the elastic spring (161), and the bottom end of the elastic spring (161) protrudes from the bottom wall of the positioning head (11).

6. The automobile wheel hub fixing nut assembly device according to claim 1, characterized in that: The lifting cylinder (20) is limitedly slidably mounted on the upper inner wall of the assembly cylinder (8), and a second feed port (201) and a first feed port (81) are respectively provided on a common side of the lifting cylinder (20) and the assembly cylinder (8), and in a natural state, the openings of the second feed port (201) and the first feed port (81) are staggered, and one end of the first feed port (81) is connected to the arc-shaped hose (14); The lifting cylinder (20) and the assembly cylinder (8) are connected via a return spring (19), and in a natural state, a certain gap is left between the bottom wall of the lifting cylinder (20) and the top wall of the connecting cylinder (18); A clamping plate (17) is rotatably mounted on the inner wall of the lifting cylinder (20) through a pin shaft component (172) and a torsion spring component (173). The bottom end of the clamping plate (17) extends beyond the bottom wall of the lifting cylinder (20). A magnetic block (171) is mounted on the outer side of the bottom of the clamping plate (17). The magnetic block (171) is magnetically connected to a magnetic block (24) disposed on the upper wall of the connecting cylinder (18).

7. The automobile wheel hub fixing nut assembly device according to claim 1, characterized in that: An upper extension guide cylinder (151) is provided at the upper end of the fastening sleeve (15), the interior of the upper extension guide cylinder (151) gradually expands outward from bottom to top, and the bottom opening corresponds to and overlaps with the top opening of the fastening sleeve (15).

8. The automobile wheel hub fixing nut assembly device according to claim 1, characterized in that: One end of the finger block (22) is slidably mounted on the inner wall notch of a limiting groove (29) provided on the inner wall of the fastening sleeve (15) via a second pin shaft component (222), and the finger block (22) can be deflected around the second pin shaft component (222), and both ends of the second pin shaft component (222) are connected to the limiting groove (29) via a first spring component (221).

9. The automobile wheel hub fixing nut assembly device according to claim 1, characterized in that: A pair of notches are symmetrically formed on the middle wall of the connecting tube (18), and a conductive ring 1 (26) and a conductive ring 2 (39) are respectively installed in the notches. The conductive ring 1 (26) is electrically connected to the brush member 1 (25) and the copper contact 1 (27) in sequence, and the conductive ring 2 (39) is electrically connected to the brush member 2 (35) and the copper contact 2 (38) in sequence.

10. The automobile wheel hub fixing nut assembly device according to claim 1, characterized in that: The outer wall of the pneumatic block (21) is provided with a plurality of sliding grooves (32) for assembling the blade plate (30); a limit pin (31) is provided at one end of the blade plate (30); and limit blocks (33) are provided at the upper and lower ends of the blade plate (30); the limit pin (31) and the limit block (33) are slidably mounted together in notches provided at the top and bottom walls of the sliding groove (32); The inner wall of the sliding groove (32) is provided with a pair of shallow grooves (36) symmetrically arranged at the top and the bottom, the shallow groove (36) is used to limit the V-shaped elastic strip (34), and a second copper contact piece (37) is obliquely installed at one end of the shallow groove (36), and a second copper contact point (38) is provided on the side away from the second copper contact piece (37).

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