Automobile wheel hub fixing nut assembling device

Abstract

The present application relates to the field of automobile assembly, especially to a kind of automobile wheel hub fixing nut assembly device, the upper portion of machine tool is equipped with cylinder piece by mounting bracket, and the telescopic end of cylinder piece is equipped with multiple nut assembly mechanism by supporting arm, and the bottom of mounting bracket is provided with limiting seat for assembling workpiece, and bolt assembly rod is arranged on limiting seat to place fastener.In the present application, nut piece in fastening sleeve is lowered by cylinder piece and is connected with bolt piece on workpiece, and when nut piece contacts bolt piece, nut piece extrudes finger block and triggers pneumatic block to rotate, to drive fastening sleeve to rotate and fasten, and when fastened to a certain torsion, to avoid damaging fastener and workpiece, leaf plate outside pneumatic block is deflected by air pressure, and copper contact mechanism is triggered to stop pumping, to complete single fastening operation, which does not need manual fastening bolt multiple times, and does not need to limit fastener by tool, effectively improving assembly efficiency.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of automobile assembly, in particular to an automobile wheel hub fixing nut assembly device. BACKGROUND

[0002] The automobile assembly line is the last process in automobile production, which includes the assembly work of automobile wheel rim. In this process, since part of the wheel rim and spoke are set in a split type, the spoke needs to be connected with the wheel rim through nuts and bolts, and a torque wrench is used to tighten according to the corresponding torque value.

[0003] Since the split type wheel rim is generally suitable for large heavy vehicles, when manually assembling, not only the heavy wheel hub and spoke need to be held, but also the fasteners need to be manually aligned and installed. Since multiple fastening holes are provided on one wheel hub, the steps of manual repeated alignment, tightening and moving are required, which is low in work efficiency and time-consuming and laborious. SUMMARY

[0004] The purpose of the present application is to solve the problems existing in the prior art and provide an automobile wheel hub fixing nut assembly device.

[0005] In order to achieve the above purpose, the present application adopts the following technical scheme:

[0006] An automobile wheel hub fixing nut assembly device, comprising a machine tool, a gas cylinder is installed on the upper part of the machine tool through a mounting bracket, a plurality of nut assembly mechanisms are installed on the telescopic end of the gas cylinder through a support arm;

[0007] A limiting seat for assembling workpieces is arranged at the bottom of the mounting bracket, and a bolt assembly rod is arranged on the limiting seat to place fasteners;

[0008] The nut assembly mechanism comprises an assembly cylinder, a lifting cylinder is slidably installed on the inner wall of the upper part of the assembly cylinder, and a connecting cylinder is slidably sleeved at the bottom, a fastening sleeve driven to rotate by a pneumatic block is installed on the inner wall of the connecting cylinder, a pair of finger blocks are limitingly and slidably installed on the inner wall of the fastening sleeve, the finger blocks are deflected through a pin shaft piece two, a copper contact piece one is arranged on the upper wall of the finger blocks, the copper contact piece one is electrically connected with a copper contact point one arranged above in correspondence, and the copper contact point one is electrically connected with a brush piece one and a conductive ring one in sequence through a wire to realize circuit connection;

[0009] A plurality of leaf plates are limitingly and slidably installed on the outer side of the pneumatic block, the leaf plates are deflected through a limiting pin arranged at one end thereof, a V-shaped elastic strip is installed on the limiting pin, one side of the V-shaped elastic strip is in extrusion contact with a copper contact piece two, and when the leaf plates are deflected, the copper contact piece two is extruded to deform to excite a copper contact point two.

[0010] Furthermore, a preferred configuration is that a guide frame for assembling workpieces is provided on one side of the machine tool.

[0011] In addition, a preferred structure is that the assembly cylinder is mounted on the support arm by a mounting block, and a nut feeding pipe is installed on the upper side of the assembly cylinder by an arc-shaped flexible hose, with one end of the arc-shaped flexible hose communicating with the inside of the assembly cylinder.

[0012] In addition, a preferred structure is that a pneumatic chamber is installed in the middle of the assembly cylinder, a pneumatic block is provided in the pneumatic chamber, the pneumatic block is connected to the fastening sleeve, and the middle of the pneumatic block is rotatably installed inside the assembly cylinder through a bearing component.

[0013] An air inlet is provided on one side of the pneumatic cabin, and the air inlet of the air inlet is connected to an external air source mechanism through a connecting pipe.

[0014] In addition, a preferred structure is that the bottom of the assembly cylinder is provided with a positioning head, which 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. Limiting beads are installed in the mounting grooves, one side of the limiting beads is in contact with the elastic spring, and the bottom end of the elastic spring extends out of the bottom wall of the positioning head.

[0015] In addition, the preferred structure is that the lifting cylinder is limited and slidably installed on the upper inner wall of the assembly cylinder, and the lifting cylinder and the assembly cylinder are respectively provided with inlet two and inlet one on the common side. In the natural state, the openings of inlet two and inlet one are staggered, and one end of inlet one is connected to the arc-shaped hose.

[0016] The lifting cylinder and the assembly cylinder are connected by a return spring, and in the natural state, there is a certain gap between the bottom wall of the lifting cylinder and the top wall of the connecting cylinder.

[0017] The inner wall of the lifting cylinder is rotatably mounted with a clamping plate via a pin and a torsion spring. The bottom end of the clamping plate extends beyond the bottom wall of the lifting cylinder, and a magnetic block is installed on the outer side of the bottom of the clamping plate. The magnetic block is magnetically connected to a magnetic block set on the upper wall of the connecting cylinder.

[0018] In addition, a preferred structure is that the upper end of the fastening sleeve is provided with an upper extension guide cylinder, 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.

[0019] Furthermore, in a preferred configuration, one end of the finger block is slidably mounted on the inner wall opening of the limiting groove 1 opened in the inner wall of the fastening sleeve via a pin 2, and the finger block can deflect around the pin 2, and both ends of the pin 2 are connected to the limiting groove 1 via a spring 1.

[0020] In addition, preferably, the middle part of the connecting cylinder is provided with a pair of symmetrically arranged notches in the inner and outer walls, and a conductive ring I and a conductive ring II are respectively arranged in the notches.

[0021] In addition, preferably, the outer wall of the pneumatic block is provided with a plurality of sliding grooves for assembling the leaf plates, one end of each leaf plate is provided with a limiting pin, and the upper and lower ends of each leaf plate are provided with limiting blocks, and the limiting pin and the limiting block are slidably arranged in the notches in the top and bottom walls of the sliding groove.

[0022] The inner wall of the sliding groove is provided with a pair of symmetrically arranged shallow grooves, the shallow grooves are used for limiting the V-shaped elastic strips, and one end of each shallow groove is obliquely provided with a copper contact piece II, and the side away from the copper contact piece II is provided with a copper contact II.

[0023] The beneficial effects of the present application are:

[0024] In the present application, the nut in the fastening sleeve is lowered by the cylinder and is connected with the bolt on the workpiece, and when the nut contacts the bolt, the nut extrudes the finger-shaped block and activates the rotation of the pneumatic block to rotate the fastening sleeve, and when the fastening reaches a certain torque, to avoid damaging the fastening and the workpiece, the leaf plate on the outer side of the pneumatic block is deflected by the gas pressure, and the copper contact piece mechanism is activated to stop the gas pumping, thereby completing the single fastening operation. This mechanism does not need manual fastening of the bolt multiple times, and does not need to use tools to limit the fastening, effectively improving the assembly efficiency. BRIEF DESCRIPTION OF DRAWINGS

[0025] Figure 1 The present application provides a machine tool overall external structure diagram of an automobile hub fixing nut assembly device;

[0026] Figure 2 The present application provides a partial structure diagram of a nut assembly device;

[0027] Figure 3 The present application provides a nut assembly mechanism diagram;

[0028] Figure 4 The present application provides an assembly cylinder external structure diagram;

[0029] Figure 5 The present application provides an assembly cylinder internal structure sectional view;

[0030] Figure 6 The present application provides a positioning head butt joint assembly diagram;

[0031] Figure 7 The present application provides an explosion diagram of the lifting cylinder installation structure;

[0032] Figure 8 The exploded schematic view of the clamping plate mounting structure proposed by the present application;

[0033] Figure 9 The sectional view of the internal structure of the connecting cylinder proposed by the present application;

[0034] Figure 10 The schematic view of the finger block mounting structure proposed by the present application;

[0035] Figure 11 The schematic view of the position relationship between the clamping plate and the connecting cylinder proposed by the present application;

[0036] Figure 12 The schematic view of the limiting bead mounting structure proposed by the present application;

[0037] Figure 13 The schematic view of the limiting seat structure proposed by the present application;

[0038] Figure 14 The schematic view of the pneumatic block connecting structure proposed by the present application;

[0039] Figure 15 The schematic view of the vane plate mounting structure proposed by the present application;

[0040] Figure 16 The schematic view of the internal structure of the vane plate mounting proposed by the present application;

[0041] Figure 17 The schematic view of the second copper contact piece mounting structure proposed by the present application.

[0042] In the figure: 1, machine tool; 101, limiting seat; 2, mounting frame; 3, air cylinder; 4, guide frame; 5, bolt assembly rod; 6, rim; 61, spoke cover; 7, support arm; 71, mounting block; 8, assembly cylinder; 81, feeding port one; 9, nut feeding pipe; 10, pneumatic cabin; 11, positioning head; 12, air connection nozzle; 13, connecting pipe; 14, arc-shaped hose; 15, fastening sleeve; 151, upper extension guide cylinder; 16, limiting bead; 161, elastic spring piece; 162, mounting groove; 17, clamping plate; 171, magnetic block; 172, pin shaft piece one; 173, torsional spring piece one; 18, connecting cylinder; 19, return spring; 20, lifting cylinder; 201, feeding port two; 21, pneumatic block; 22, finger block; 221, spring piece one; 222, pin shaft piece two; 223, copper contact piece one; 23, annular groove; 24, magnetic attraction block; 25, brush piece one; 26, conductive ring one; 27, copper contact one; 28, bearing piece; 29, limiting groove one; 30, vane plate; 31, limiting pin; 32, sliding groove; 33, limiting block; 34, V-shaped elastic strip; 35, brush piece two; 36, shallow groove; 37, second copper contact piece; 38, copper contact two; 39, conductive ring two. DETAILED DESCRIPTION

[0043] 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 some of the embodiments of the present application, rather than all the embodiments of the present application.

[0044] Referring to Figures 1-4 , Figure 13 A nut assembly device for automobile wheel hub includes a machine tool 1, a cylinder 3 is assembled on one side of the upper part of the machine tool 1 through a mounting frame 2, the telescopic rod of the cylinder 3 extends downward to the middle part of the mounting frame 2, a plurality of support arms 7 are installed on the rod head of the telescopic rod, annular support members are installed on the outer sides of the support arms 7 to improve the overall mechanical strength, and a nut assembly mechanism is installed on each outer side end of each support arm 7.

[0045] The upper part of the machine tool 1 is provided with a window, a guide frame 4 is installed at the window, the guide frame 4 is used for guiding the introduction of a rim member 6 that has not been machined, the rim member 6 to be machined is assembled on a limiting seat 101 directly below the mounting frame 2, a plurality of bolt assembly rods 5 are arranged on the limiting seat 101, fastening bolt members for installation are assembled on the bolt assembly rods 5, and the bolt assembly rods 5 are limited in cooperation with the bolt heads.

[0046] Further, the nut assembly mechanism is integrally assembled on the support arm 7 by a mounting block 71, the nut assembly mechanism includes an assembly cylinder 8 as a main body, the assembly cylinder 8 is connected with the support arm 7 through the mounting block 71, one side of the upper part of the assembly cylinder 8 is connected with a nut feeding pipe 9 through an arc-shaped hose 14, a support steel bar is arranged on the outer side of the arc-shaped hose 14 to ensure the support property, and nut members are assembled in the nut feeding pipe 9, the nut members are guided into the inside of the assembly cylinder 8 through the arc-shaped hose 14 to be fed.

[0047] The bottom of the assembly cylinder 8 is provided with a pneumatic cabin 10, a gas connection nozzle 12 is installed on one side of the pneumatic cabin 10, the gas inlet end of the gas connection nozzle 12 is connected with an external gas source mechanism through a connecting pipe 13, so that compressed gas is introduced.

[0048] A positioning head 11 is installed at the bottom of the pneumatic cabin 10, the positioning head 11 is used for abutting the mounting hole of a rim cover 61 to ensure the assembly accuracy.

[0049] Referring to Figures 5-9 , Figure 11 The bottom inner side of the assembly cylinder 8 is sleeved with a connecting cylinder 18, the connecting cylinder 18 can slide up and down on the inner wall of the assembly cylinder 8, the middle part of the connecting cylinder 18 is provided with the pneumatic cabin 10, and a pneumatic block 21 is arranged in the pneumatic cabin 10.

[0050] The lifting cylinder 20 is located above the connecting cylinder 18 and is limitingly and slidingly installed on the inner wall of the assembly cylinder 8, and in the natural state, the upper wall of the connecting cylinder 18 is spaced apart from the bottom wall of the lifting cylinder 20.

[0051] The top wall of the lifting cylinder 20 is connected with the assembly cylinder 8 through the return spring 19, and the common side of the lifting cylinder 20 and the assembly cylinder 8 is respectively provided with the second feeding port 201 and the first feeding port 81, and in the natural state, the second feeding port 201 and the first feeding port 81 are staggered under the connection and support of the return spring 19, so as to block the nut member from entering the assembly cylinder 8.

[0052] Further, the inner wall of the lifting cylinder 20 is symmetrically provided with a pair of inwardly inclined clamping plates 17, the upper end of the clamping plate 17 is rotatably installed on the cylinder wall through the pin shaft piece 172, and the torsional spring piece 173 is arranged at the rotary connection of the pin shaft piece 172, and the torsional spring piece 173 generates a torsional force for deflecting the clamping plate 17 to the center of the lifting cylinder 20, thereby clamping and limiting the nut member.

[0053] Further, the outer wall of the connecting cylinder 18 is symmetrically provided with a pair of magnetic blocks 24, and the outer wall of the connecting cylinder 18 is provided with an annular groove 23 for abutting and slidingly assembling the assembly cylinder 8.

[0054] The connecting cylinder 18 is rotatably installed in the inner wall of the connecting cylinder 18, one side of the fastening sleeve 15 is connected with the pneumatic block 21, and the fastening sleeve 15 is synchronously driven to rotate with the pneumatic block 21, and the upper wall of the fastening sleeve 15 is connected with the 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 in inverted conical shape, and the hexagonal groove is arranged at the connection of the fastening sleeve 15 and the upper extension guide cylinder 151 to guide and limit the nut member.

[0055] Further, the upper end of the connecting cylinder 18 extends to a position below the clamping plate 17, the bottom of the clamping plate 17 is provided with a magnetic block 171 to magnetically attract the magnetic block 24 arranged on the connecting cylinder 18, and in the natural state, the magnetic block 24 is located obliquely below the magnetic block 171 and no magnetic attraction force is generated between the two.

[0056] Referring to Figures 9-10 A pair of limiting grooves 29 are symmetrically arranged on both sides of the inner wall of the fastening sleeve 15, the finger-shaped block 22 is rotatably installed in the limiting groove 29 through the pin shaft piece 222, the upper part of the finger-shaped block 22 is inclined, and the bottom is flat.

[0057] The upper end of the finger-shaped block 22 is limitingly and slidingly installed in the inner wall of the limiting groove 1 through the pin shaft piece 222, and the spring piece 221 is connected between the limiting groove 1 and the pin shaft piece 222, and the spring piece 221 is used to tightly and reset the whole finger-shaped block 22.

[0058] Furthermore, the finger block 22 can deflect and slide up and down to a certain extent. The upper wall of the finger block 22 is provided with a copper contact piece 223. The upper groove wall of the copper contact piece 223 is provided with a copper contact point 27. The copper contact point 27 is electrically connected to the brush component 25 through a wire. The brush component 25 is provided with positive and negative poles. A conductive ring 26 is provided on the side away from the brush component 25. The conductive ring 26 is assembled on one side of the inner wall of the connecting cylinder 18 and is electrically connected to the brush component 25. The conductive ring 26 is electrically connected to the machine tool 1 through a wire.

[0059] Among them, the brush component 25 rotates synchronously with the fastening sleeve 15.

[0060] Reference Figure 12 The inner wall of the positioning head 11 is symmetrically provided with mounting grooves 162 on both sides. The mounting grooves 162 are provided with limiting beads 16, the diameter of which is slightly larger than the outer groove opening of the mounting groove 162. An elastic spring 161 is installed on one side of the inner wall of the mounting groove 162. The elastic spring 161 is slightly arc-shaped and its bottom end extends out of the bottom wall of the positioning head 11.

[0061] In its natural state, the elastic spring 161 contacts the outer wall of the limiting bead 16 to limit the bead 16. When the bottom of the elastic spring 161 is compressed and deformed, the elastic spring 161 is bent as a whole. At this time, there is a gap between the limiting bead 16 and the elastic spring 161 to allow the limiting bead 16 to move freely.

[0062] Reference Figure 9 , Figures 14-17 The pneumatic block 21 is connected to the fastening sleeve 15 and is rotatably mounted in the middle of the connecting cylinder 18 via the bearing component 28. The pneumatic block 21 is rotatably disposed in the internal cavity of the pneumatic chamber 10. The inner wall cavity of the pneumatic chamber 10 is eccentrically disposed with 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 the other side has a gap. At the same time, the cavity with the gap is directly connected to the air nozzle 12 and is tangent to the air intake direction.

[0063] Furthermore, the pneumatic block 21 has multiple sliding grooves 32 inside to slide the blade 30. A limit pin 31 and a limit block 33 are installed on one side of the blade 30 to limit the sliding on the top and bottom sides of the sliding groove 32.

[0064] Among them, a pair of V-shaped elastic strips 34 are symmetrically installed in the middle of the limiting pin 31. The V-shaped elastic strips 34 extend to the inner walls of both sides of the sliding groove 32 and are in contact with the inner walls of the groove.

[0065] A shallow groove 36 is provided on the upper side of the sliding groove 32. The shallow groove 36 is connected to the V-shaped elastic strip 34. A copper contact piece 37 is installed at an angle on one side of the shallow groove 36. The copper contact piece 37 is deformed and tilted by the pressure of the V-shaped elastic strip 34.

[0066] The second copper contact 38 is arranged on the side away from the copper contact 37, is arranged in the shallow groove 36, and is electrically connected with the second brush piece 35 through a wire. The second brush piece 35 is assembled in the inside of the pneumatic block 21. On the contrary, the conductive ring 39 is assembled on the inner wall of the connecting cylinder 18 to be in electrical contact with the second brush piece 35.

[0067] The connecting cylinder 18 is internally and externally symmetrical on both sides of the middle cylinder wall, and the slot is arranged with the conductive ring 26 and the conductive ring 39 to electrically connect the brush piece 25 and the brush piece 35.

[0068] In this embodiment, the rim 6 is temporarily fixed by being assembled on the limiting seat 101 at the upper part of the machine tool 1, and the threaded mounting hole is butt jointed with each bolt assembly rod 5, so that the bolt placed on the upper part of the bolt assembly rod 5 penetrates into the mounting hole. The boss arranged on the limiting seat 101 can limit the inner wall of the rim 6.

[0069] Then the spoke cover 61 is assembled on the rim 6, and the bolt is penetrated into each mounting hole. Then the cylinder piece 3 controlled by the machine tool 1 is extended to drive the support arm 7 to descend as a whole, at this time, the nut assembly mechanism descends, the positioning head 11 in it is gradually inserted into the mounting hole of the spoke cover 61, and the bolt end head in the mounting hole presses the nut piece arranged on the positioning head 11, so that the nut piece slides upward on the inner wall of the fastening sleeve 15.

[0070] At this time, the nut piece moves upward under the action of 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 the bottom wall of the finger-shaped block 22 arranged on the inner wall of the fastening sleeve 15. The finger-shaped block 22 moves upward under the pressing until the copper contact 1 223 at the top of the copper contact 1 223 is in electrical contact with the copper contact 1 27 arranged on the inner wall of the slot. The copper contact 1 27 feeds back the corresponding electrical signal to the machine tool 1 through the wire, the brush piece 1 25 and the conductive ring 1 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 block 21 for driving is arranged in the pneumatic cabin 10. The pneumatic block 21 is driven by the compressed gas to rotate the fastening sleeve 15 synchronously, so as to assemble and tighten the nut piece.

[0071] In this process, the cylinder piece 3 is still in the state of being extended at this time, and the nut piece gradually descends with the rotation and fastening of the fastening sleeve 15.

[0072] Synchronous, with the gradual stretching of the cylinder 3, the fastening sleeve 15 gradually moves down, the assembly cylinder 8 is gradually moved down by the relative force, and the nut piece is gradually connected with the bolt piece. At this time, the positioning head 11 is in complete contact with the bottom wall of the mounting hole, and the assembly cylinder 8 is connected with the connecting cylinder 18 outside. In this process, the clamp plate 17 installed in the assembly cylinder 8 gradually approaches the magnetic block 24 arranged on the upper wall of the connecting cylinder 18, and when it falls to a certain position, the magnetic block 171 on the outer wall of the clamp plate 17 is adsorbed and attached to the magnetic block 24. At this time, the clamp plate 17 deflects outward, so that the pre-assembled nut piece originally clamped in the middle of the clamp plate 17 falls down. When it falls to the end, that is, when the connecting cylinder 18 and the lifting cylinder 20 are in complete contact, the magnetic block 24 passes through the magnetic block 171, and they are no longer in contact at this time. The clamp plate 17 is deflected and reset by the torsional spring piece 173.

[0073] Synchronous with the clamp plate 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 complete contact and pressure. The lifting cylinder 20 goes up under the action of force, and the reset spring 19 on the upper wall of the lifting cylinder 20 is compressed and deformed. At this time, the second feeding port 201 and the first feeding port 81 gradually coincide from the staggered state, and the nut piece in the nut feeding pipe 9 falls into the lifting cylinder 20 and is clamped by the clamp plate 17.

[0074] Among them, it is more summarized that the nut piece is arranged at one place of the connecting cylinder 18, the clamp plate 17 and the first feeding port 81. With the production operation, the nut piece falls down and is alternately fed.

[0075] Among them, in the process of the nut piece falling from the clamp plate 17 to the fastening sleeve 15, the upper extension guide cylinder 151 on the upper part of the fastening sleeve 15 guides the unloading force, so that the corners are aligned to be assembled into the fastening sleeve 15 to complete the feeding.

[0076] Among them, it is more summarized that with the continuous downward movement of the cylinder 3, the nut piece presses the top pressure of the finger-shaped block 22 to trigger the rotation of the fastening sleeve 15. At the same time, the clamp plate 17 is opened to make another nut piece fall into the fastening sleeve 15. At this time, the nut piece connected with the bolt piece has been tightly fastened. At this time, the cylinder 3 drives the whole device to go up, and the nut piece falling into 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.

[0077] Further, the machine tool 1 controls the external air source mechanism to pump compressed gas into the pneumatic cabin 10, and the pneumatic block 21 is rotated by the vane plate 30. Here, it is the same as the pneumatic motor, and the pneumatic cabin 10 is provided with corresponding air inlet and outlet.

[0078] Wherein, when the fastening sleeve 15 rotates at high speed to drive the nut piece to tighten, in order to avoid the damage of the fastener and the workpiece caused by large torque, when the fastening sleeve 15 reaches a certain torque, the opposite force generated by the fastening sleeve 15 is directly transmitted to the pneumatic block 21, at this time the rotation of the pneumatic block 21 is blocked, and the vane plate 30 located at one place of the air connection nozzle 12 is stretched out under the centrifugal force, the vane plate 30 is in direct contact with high-speed compressed gas, the vane plate 30 is deflected under the gas pressure, at this time the vane plate 30 rotates around the limiting pin 31 as the deflection shaft, at this time the V-shaped elastic strip 34 fixed on the limiting pin 31 is deformed and exerts force on the copper contact piece two 37 arranged at one place of the shallow groove 36, so that it is deformed to contact the copper contact two 38, at this time the copper contact two 38, copper contact piece two 37, wire, brush piece two 35, conductive ring two 39 are in electrical connection, the conductive ring two 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, and the pneumatic cylinder piece 3 goes up, thereby completing the assembly of the single hub piece.

[0079] Wherein, in actual application, the V-shaped elastic strip 34 enables the vane plate 30 to reset after deflection, and in the normal fastening process, the deflection angle of the vane plate 30 is insufficient to deform the copper contact piece two 37.

[0080] Due to the setting of the limiting block 33, when the vane plate 30 does not stretch out of the outer wall of the pneumatic block 21, the limiting block 33 limits the left and right deflection of the vane plate 30.

[0081] Wherein, in actual application, when the positioning head 11 contacts with the mounting hole of the spoke cover 61, the elastic spring sheet 161 at the bottom of the positioning head 11 is extruded and goes up, and a certain degree of bending is generated, so that the limiting bead 16 has a certain space for movement, thereby allowing the nut piece to pass through.

[0082] Wherein, in actual application, before processing, the corresponding fasteners such as gasket pieces, bolt pieces and nut pieces need to be placed in the corresponding position manually.

[0083] Wherein, in actual application, the machine tool 1 is provided with a guide frame 4 for mounting the unprocessed rim piece 6, the guide frame 4 extends to the limiting seat 101 side and facilitates the operator to take the material.

[0084] Wherein, in actual application, dynamic sealing pieces are arranged at the connection between the conductive ring piece and the brush piece.

[0085] Wherein, in actual application, an inclined section is arranged at the outer slot of the sliding groove 32 to meet the small range deflection of the vane plate 30.

[0086] Among them, it is worth noting that the brush, copper contact and conductive ring mechanism of the above mechanism are provided with corresponding positive and negative poles to realize circuit communication. The specific circuit principle, wiring specification and operation involved are well known to those skilled in the art, and will not be described here.

[0087] Among them, it is worth noting that the brush, copper contact and conductive ring mechanism of the above mechanism are provided with corresponding positive and negative poles to realize circuit communication. The specific circuit principle, wiring specification and operation involved are well known to those skilled in the art, and will not be described here.

[0088] The above is only the preferred specific embodiment of the present application, but the protection scope of the present application is not limited to this. Any person skilled in the art can make equivalent replacement or change according to the technical solution and the inventive concept of the present application within the technical range disclosed by the present application, which should be covered within the protection scope of the present application.

Claims

1. A device for assembling automotive wheel hub fixing nuts, comprising a machine tool (1), characterized in that, The upper part of the machine tool (1) is equipped with a cylinder component (3) via a mounting bracket (2), and the telescopic end of the cylinder component (3) is equipped with a plurality of nut assembly mechanisms via a support arm (7). The bottom of the mounting bracket (2) is provided with a limiting seat (101) for assembling workpieces, and a bolt assembly rod (5) is provided on the limiting seat (101) to place fasteners. The nut assembly mechanism includes an assembly cylinder (8), an upper inner wall of which a lifting cylinder (20) is slidably installed, and a connecting cylinder (18) is slidably sleeved at the bottom. The inner wall of the connecting cylinder (18) is fitted with a fastening sleeve (15) driven to rotate by a pneumatic block (21). The inner wall of the fastening sleeve (15) is fitted with a pair of finger blocks (22). The finger blocks (22) are deflected by a pin (222). The upper wall of the finger blocks (22) is provided with a copper contact piece (223). The copper contact piece (223) is electrically connected to the copper contact point (27) above it. The copper contact point (27) is electrically connected to the brush piece (25) and the conductive ring (26) in sequence through wires to achieve circuit connection. Multiple blades (30) are slidably mounted on the outer side of the pneumatic block (21). The blades (30) are deflected by a limiting pin (31) at one end. A V-shaped elastic strip (34) is mounted on the limiting pin (31). One side of the V-shaped elastic strip (34) is pressed against the copper contact piece (37). When the blades (30) are deflected, the copper contact piece (37) is deformed by compression to activate the copper contact point (38). The assembly cylinder (8) is mounted on the support arm (7) via the mounting block (71), and a nut feeding pipe (9) is installed on the upper side of the assembly cylinder (8) via an arc-shaped hose (14), with one end of the arc-shaped hose (14) communicating with the inside of the assembly cylinder (8). A pneumatic chamber (10) is installed in the middle of the assembly cylinder (8). A pneumatic block (21) is provided inside the pneumatic chamber (10). The pneumatic block (21) is connected to the fastening sleeve (15). The middle part of the pneumatic block (21) is rotatably installed inside the assembly cylinder (8) through a bearing component (28). An air inlet (12) is provided on one side of the pneumatic cabin (10), and the air inlet of the air inlet (12) is connected to an external air source mechanism through a connecting pipe (13). The lifting cylinder (20) is slidably installed on the upper inner wall of the assembly cylinder (8), and is located on the common side of the lifting cylinder (20) and the assembly cylinder (8) respectively, with feed inlet 2 (201) and feed inlet 1 (81). In the natural state, the openings of feed inlet 2 (201) and feed inlet 1 (81) are staggered, and one end of feed inlet 1 (81) is connected to the arc-shaped hose (14). The lifting cylinder (20) and the assembly cylinder (8) are connected by a return spring (19), and in the natural state, there is a certain gap between the bottom wall of the lifting cylinder (20) and the top wall of the connecting cylinder (18). The inner wall of the lifting cylinder (20) is rotatably mounted with a clamping plate (17) through a pin (172) and a torsion spring (173). The bottom end of the clamping plate (17) extends beyond the bottom wall of the lifting cylinder (20), and a magnetic block (171) is installed on the outer side of the bottom of the clamping plate (17). The magnetic block (171) is magnetically connected to the magnetic attraction block (24) provided on the upper wall of the connecting cylinder (18). One end of the finger block (22) is slidably mounted on the inner wall of the limiting groove (29) opened in the inner wall of the fastening sleeve (15) via the second pin (222), and the finger block (22) can deflect around the second pin (222), and the two ends of the second pin (222) are connected to the limiting groove (29) via the first spring (221).

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

3. The automobile wheel hub fixing nut assembly device according to claim 1, characterized in that, The bottom of the assembly cylinder (8) is provided with a positioning head (11), which is used to position the mounting hole. A pair of mounting grooves (162) are symmetrically opened on the inner wall of the bottom end of the positioning head (11). A limiting bead (16) is installed in the mounting groove (162). One side of the limiting bead (16) is pressed against the elastic spring (161), and the bottom end of the elastic spring (161) extends out of the bottom wall of the positioning head (11).

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

5. The automobile wheel hub fixing nut assembly device according to claim 1, characterized in that, The middle wall of the connecting cylinder (18) is provided with a pair of slots symmetrically arranged inside and outside. Conductive ring one (26) and conductive ring two (39) are respectively installed in the slots. Conductive ring one (26) is electrically connected to brush one (25) and copper contact one (27) in sequence, and conductive ring two (39) is electrically connected to brush two (35) and copper contact two (38) in sequence.

6. 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 multiple sliding grooves (32) for mounting the blade (30). One end of the blade (30) is provided with a limit pin (31), and the upper and lower ends of the blade (30) are provided with limit blocks (33). The limit pin (31) and the limit block (33) are slidably installed in the slots opened on 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) arranged symmetrically on the upper and lower sides. The shallow grooves (36) are used to limit the V-shaped elastic strip (34). A copper contact piece (37) is installed at one end of the shallow groove (36) at an angle, and a copper contact point (38) is provided on the side away from the copper contact piece (37).

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