CN110789766B

CN110789766B - Wheel hub lid packaging robot

Info

Publication number: CN110789766B
Application number: CN201911104179.4A
Authority: CN
Inventors: 王佳磊
Original assignee: Xuzhou Langhua Machinery Co ltd
Current assignee: Xuzhou Langhua Machinery Co ltd
Priority date: 2019-11-09
Filing date: 2019-11-09
Publication date: 2021-06-29
Anticipated expiration: 2039-11-09
Also published as: CN110789766A; JP6859515B1; JP2021075334A

Abstract

The invention provides a hub cap packaging robot, and belongs to the technical field of mechanical equipment. It has solved the lower problem of current wheel hub lid diolame quality and efficiency. This wheel hub lid packaging robot, including frame and conveyer belt, the frame is equipped with membrane mechanism at the conveyer belt front end, the frame is equipped with the lifter plate in the top of conveyer belt rear end, be connected with interior clamping ring on the lifter plate, the outside circumference of interior clamping ring is equipped with a plurality of pendulum rods, the upper end of these a plurality of pendulum rods all radially inwards inclines and articulates on the lifter plate, the lower extreme of pendulum rod all rotates and is connected with the pushing roll, be connected with the extension spring that resets between pendulum rod and lifter plate, still linked firmly the cutter on the lifter plate, the cutter can press on the conveyer belt when the lower extreme of a plurality of pendulum rods outwards swings and expand, circumference is connected with the outer compression ring on the. This wheel hub lid packaging robot can cover the cladding on the wheel hub with the protection film sticker, improves diolame quality and efficiency.

Description

Wheel hub lid packaging robot

Technical Field

The invention belongs to the technical field of mechanical devices, and relates to a hub cap packaging robot.

Background

Automobile tires are mounted on hubs, and for low-distribution automobile models, in order to reduce cost, the hubs are relatively missed, so consumers usually purchase hub covers to mount the hubs, the hub covers are provided with spokes which are used for being fixed on inner edges of the hubs and are distributed in the circumferential direction, the hub covers are mutually overlapped in the transportation and storage processes, in order to avoid mutual abrasion, the outer surfaces of the hub covers need to be subjected to film pasting packaging before leaving factories, the film pasting packaging for the hub covers is usually carried out manually at present, the efficiency is low, and the film pasting packaging quality is difficult to guarantee.

Disclosure of Invention

The invention aims to solve the problems in the prior art, and provides a hub cap packaging robot which can be used for coating a protective film on a hub cap in a sticking manner, so that the film coating quality and efficiency are improved.

The purpose of the invention can be realized by the following technical scheme: the utility model provides a wheel hub lid packaging robot, includes the frame and along vertically setting up and being used for tiling the conveyer belt of wheel hub lid, its characterized in that, the frame is equipped with the last membrane mechanism that can be with the protection film shop on the wheel hub lid in the conveyer belt front end, the frame is equipped with the lifter plate that can go up and down in the top of conveyer belt rear end, there is interior clamping ring along vertical sliding connection on the lifter plate, the outside circumference of interior clamping ring is equipped with a plurality of pendulum rods, and the upper end of these a plurality of pendulum rods all radially inwards inclines and articulates on the lifter plate, and the lower extreme of pendulum rod all rotates and is connected with the push roller, is connected with between pendulum rod and lifter plate and can makes the push roller radially inwards press the extension spring that resets on the inner compression ring outer peripheral face, still linked firmly annular cutter on the lifter plate, this cutter is located the lifter plate below and encircles a plurality of pendulum rods setting, and when a plurality, the cutter is circumferentially connected with an annular outer pressure ring, and when the cutter is pressed on the conveying belt, the outer pressure ring can tension the protective films on the inner side and the outer side of the cutter towards two sides.

The hub cover is laid on the conveying belt, the film feeding mechanism can independently lay the protective film on the hub cover, the conveying belt conveys the hub cover to the lower part of the lifting plate, the lifting plate descends, the inner pressure ring can be pre-pressed on the inner edge of the hub cover, so that the middle part of the protective film is adhered to the inner edge of the hub cover and is pressed and positioned on the middle part of the protective film, then the push roller is abutted against the spoke of the hub cover, along with the continuous descending of the lifting plate, the lower end of the swing rod can swing outwards due to the fact that the upper end of the swing rod is in an inwards inclined state, namely the push roller rolls outwards along the spoke of the hub cover, so that the protective film is adhered to the spoke of the hub cover until the cutter is sleeved on the hub cover and abutted against the conveying belt, at the moment, the outer pressure ring can tension the protective film, the cutter can cut off the outer edge part of the protective film, improve the quality and efficiency of the coating.

In foretell wheel hub lid packaging robot, two guide bars have vertically been linked firmly on the interior clamping ring is gone up the side, two through-holes have been seted up on the lifter plate, two the guide bar slides respectively and passes two through-holes, two the upper end circumference of guide bar has spacing protruding edge, still overlaps on the guide bar to be equipped with the pressure film spring, and the upper end of this pressure film spring is supported and is leaned on the lifter plate downside, and the lower extreme supports and leans on the interior clamping ring is gone up the side, and spacing protruding edge is supported and is leaned on the lifter plate is gone up the side under the effect of pressure film spring. When the lifting plate descends, the film pressing spring can enable the inner pressing ring to be tightly pressed on the inner edge of the hub cover, so that the middle part of the protective film is positioned, and the protective film is prevented from deviating in the pushing process of the push roller.

In foretell wheel hub lid packaging robot, the spread groove has been seted up to the middle part circumference of pushing away the roller outer peripheral face, the lower extreme of pendulum rod rotates to be connected in the spread groove, and the parcel has the felt on pushing away the roller outer peripheral wall, the connection boss has on the downside of lifter plate, the extension spring that resets has a plurality of roots, these a plurality of extension springs and a plurality of pendulum rod one-to-one that reset, and the one end of extension spring that resets is connected on connecting the boss, and the other end is connected on the pendulum rod, and the lower extreme of pendulum rod has inside wobbling trend under the effect of extension spring. The felt can fully contact with the spoke on the hub cover, so that the wheel is suitable for different spoke surfaces.

In foretell wheel hub lid packaging robot, the lifter plate is circularly, has a plurality of long banding connecting plates along circumference at the outer border of lifter plate, the connecting plate is along radially setting, and has the spliced pole on the downside of connecting plate outer end, the lower extreme at a plurality of spliced poles is fixed to the cutter, be fixed with a plurality of U-shaped boards on the outer clamping ring, U-shaped board opening links firmly down and with the outer clamping ring, and the guiding hole has been seted up to the upper end of U-shaped board, and the U-shaped board passes through the guiding hole slip cap and establish on the spliced pole, spacing dish has on the spliced pole, still overlaps on the spliced pole to be equipped with the tensioning spring, and the upper end of this tensioning spring is supported and is leaned on the side on the U-shaped board. The tensioning spring enables the outer ring to press against the conveyor belt as the cutter descends and abuts the conveyor belt.

In the wheel hub cap packaging robot, an annular avoiding notch is formed in the outer pressure ring in the circumferential direction, the avoiding notch penetrates through the upper side face and the lower side face of the outer pressure ring, the cutter is inserted into the avoiding notch, when the U-shaped plate abuts against the limiting disc, the cutting edge of the cutter is located in the avoiding notch, two annular tensioning lip edges are formed in the lower side face of the outer pressure ring in the circumferential direction, the two tensioning lip edges are respectively located on the inner side and the outer side of the avoiding notch and close to the avoiding notch, the tensioning lip edges are made of rubber materials, the lower edge of the outer side of each tensioning lip edge inclines outwards in the radial direction, the lower edge of the inner side of each tensioning lip edge inclines inwards in the radial direction, a supporting bedplate is horizontally fixed on the frame, the upper layer of the conveying belt is laid on the supporting bedplate, a plurality of stations are arranged on the outer side, the conveying belt is further provided with an annular groove on the outer side face of each station, and the annular grooves are arranged around the positioning columns. When the outer pressure ring descends and is close to the conveyor belt, the tensioning lip edge can be in contact with the protective film in advance, and along with the pushing down of the outer pressure ring, the tensioning lip edge can deform, namely the lower edges of the two tensioning lip edges can be relatively far away from each other, so that the protective film is tensioned, and the cutter can be conveniently embedded into the annular groove and cut off the outer edge part of the protective film.

In the wheel hub lid packaging robot, two vertical guide rods are vertically and fixedly connected to the lifting plate, two vertical guide sleeves are fixed to the frame, the two vertical guide rods are respectively slidably arranged in the two vertical guide sleeves in a penetrating mode, a lifting cylinder is further fixed to the frame, and a piston rod of the lifting cylinder faces downwards and is fixedly connected with the lifting plate. So that the lifter plate remains stable.

In foretell wheel hub lid packaging robot, go up the registration roller that membrane mechanism includes the protection film reel of being used for fixing a position, this registration roller is along vertically setting up in the conveyer belt top, the frame all is equipped with banding tight seat of clamp in the both sides of conveyer belt, and presss from both sides tight seat and registration roller parallel arrangement, the frame is equipped with the removal frame that can follow lateral shifting between two tight seats of clamp, and this removal frame is located the below of registration roller, it has two drawing membrane rollers to rotate to be connected with on the removal frame, and these two drawing membrane rollers all set up with registration roller parallel, and two drawing and form the film passing clearance that is used for the protection film to pass between the membrane roller, drawing and being fixed with respectively on the membrane roller and being banding and following the pressure membrane board that length direction set up and cutting the membrane sword, when the pull-out end of protection film is pressed from both sides tight seat and move to another tight seat top of clamp, and the registration roller that stimulates the protection film can rotate and impress the protection film, the positioning roller can rotate reversely when the protective film is clamped by the other clamping seat and cut off the protective film part clamped by the other clamping seat from the protective film part above the conveyor belt by the film cutting knife. The protective film winding drum is sleeved and positioned on the positioning roller, one end of the protective film on the protective film winding drum is pulled out and penetrates through a film penetrating gap during film paving, then the end edge of the protective film is clamped in the clamping seat, the hub cover is placed on the conveying belt, the conveying belt can convey the hub cover to the position below the film pulling roller, the movable frame moves towards the other clamping seat, the film pulling roller far away from the other clamping seat can pull out the protective film from the protective film winding drum, the film pulling roller rotates for a set angle when the movable frame is positioned above the other clamping seat, the protective film can be pressed into the other clamping seat and clamped downwards by the film pressing plate, the film pulling roller reversely rotates for a set angle, the film pressing plate can be pulled out from the clamping seat, the film cutting knife can cut off the protective film paved on the hub cover, the film paving on the hub cover is completed, the film paving quality is good, and the conveying belt conveys the protective film covering to the position below the lifting plate, and the other wheel hub cover enters the lower part of the positioning roller, and the movable frame reversely moves to the upper part of the clamping seat at the moment, namely, the movable frame can finish the film laying of one wheel hub cover once moving, and the efficiency is higher.

In the wheel hub cap packaging robot, the clamping seat comprises a fixed clamping plate and a movable clamping plate which are both in a long strip shape, the fixed clamping plate is fixed on a frame, both ends of the fixed clamping plate are both transversely fixed with transverse guide rods, both ends of the movable clamping plate are both fixed with transverse guide sleeves, the two transverse guide sleeves are respectively sleeved on the two transverse guide rods in a sliding manner, the fixed clamping plate is positioned between the conveyor belt and the movable clamping plate, the side surface of the movable clamping plate facing the fixed clamping plate is fixed with a rubber diaphragm, the frame is rotatably connected with two transmission discs below the conveyor belt, the central line direction of the two transmission discs is longitudinally arranged, both ends of the two movable clamping plates are respectively hinged with transmission rods, the free ends of the transmission rods at both ends of the two movable clamping plates are respectively hinged on the disc surfaces of the two transmission discs through pin shafts, the two pin shafts on the same transmission disc are symmetrically arranged relative to the central line of the transmission discs, and the two, each round pin epaxial all is connected with foretell press mold extension spring, the other end of press mold extension spring is connected in the frame, moves the rubber diaphragm on the splint and presses on the solid fixed splint under the effect of press mold extension spring. When the pressure membrane board top promotes splint and carries out the protection film and presss from both sides tightly, should move the splint and can drive the driving disc through the transfer line and rotate, and the driving disc drives another through another transfer line and moves splint and remove for another moves splint and decides the splint separation, thereby releases the tip border of protection film, consequently continues to impress at the pressure membrane board in-process and lays the protection film on the wheel hub lid and takes out reversely, makes another tight seat of clamp is taken out to the protection film tip, and the protection film is dragged when avoiding the conveyer belt to convey.

In foretell wheel hub lid packaging robot, set up two installation gaps that set up along length direction on the outer peripheral face of film-drawing roller one side, press mold board and film-cutting knife are respectively through the fix with screw in two installation gaps, the convex border of press mold board rotates along length direction and is connected with the press mold roller bearing, and the press mold roller bearing is opposite with the blade orientation of film-cutting knife, forms foretell penetrating film clearance between two press mold roller bearings when two press mold roller bearings are relative, the border has platelike top push portion on the movable clamp plate, and the upper portion of this top push portion is to the lopsidedness of keeping away from the fixed plate, and the press mold roller bearing can push top push portion and imbed between movable clamp plate and the fixed clamp plate when the film-drawing roller is located pressing holder top and rotates to press mold roller bearing down, set up along length direction on the fixed clamp plate side and seted up the film-cutting groove, should cut the film inslot and have the film-cutting cambered surface, work as film-drawing roller counter-rotating can slide into along cutting knife's film-cutting cambered surface when the film-cutting The film cutting knife is characterized in that saw teeth protruding towards one side are uniformly distributed on the edge of the cutting edge of the film cutting knife along the length direction, the saw teeth face the inner side of the film cutting groove when the edge of the cutting edge of the film cutting knife slides into the film cutting groove, the film cutting knife is further provided with tension rods which can press the protective film part between the film cutting knife and the conveyor belt on the upper side surface of the fixed clamping plate when the edge of the cutting edge of the film cutting knife slides into the film cutting groove, two ends of the film cutting knife are hinged with tensioning arms through pin shafts, two ends of each tension rod are fixedly connected with the free ends of the two tensioning arms respectively, the hinged end of each tensioning arm is further provided with a limiting convex part, each pin shaft is sleeved with a tensioning torsion spring which can enable the limiting convex part to abut against the side surface of the film cutting knife, the tension rods are lower than the edge of the film cutting knife when the limiting convex part abuts against the side surface of the film cutting knife, and the tension rods are, and the tension rod is pressed against the upper side surface of the fixed clamping plate under the action of the tension torsion spring. The film pressing roller on the film pressing plate can roll along the pushing part when the film drawing roller rotates, so as to push the movable clamping plate, so that the movable clamping plate is separated from the fixed clamping plate, the film pressing roller can press the protective film between the movable clamping plate and the fixed clamping plate, when the film pressing roller rotates reversely, the film pressing roller rolls outwards, the friction to the protective film is smaller, but the friction of the rubber diaphragm to the protective film is larger, so that the protective film can stay between the movable clamping plate and the fixed clamping plate, the clamping seat clamps the protective film after the film pressing plate is drawn out, the film cutting knife can cut into the film cutting groove along the film cutting cambered surface when the film drawing roller rotates reversely, the protective film can be cut off by the saw teeth in the process, so as to complete film cutting, the tension rod can pre-press the protective film on the upper side surface of the fixed clamping plate when the film cutting knife is close to the film cutting groove, and the tension rod can generate friction thrust far away from the clamping seat to the protective, thereby make the protection film part between tensioning rod and the clamping seat in the state of tautening, make things convenient for the film cutter to cut off.

In the above wheel hub cap packaging robot, the moving frame is in a bar frame shape, the two film drawing rollers are rotatably connected to the inner side of the moving frame, the end of the moving frame is rotatably connected with two transmission gears, the two transmission gears are engaged with each other, one end of each film drawing roller is fixed with a driven pulley, the two transmission gears are located between the two driven pulleys, the two transmission gears are fixed with intermediate pulleys, the two driven pulleys are respectively connected with the two intermediate pulleys through belts, the end of the moving frame is also fixed with a driving motor, a motor shaft of the driving motor is fixedly connected with one of the transmission gears, the frame is transversely fixed with two guide shafts, two ends of the moving frame are respectively fixed with guide sleeves, the guide sleeves at the two ends are respectively sleeved on the two guide shafts in a sliding manner, the frame is further rotatably connected with the two transmission pulleys, and the two transmission pulleys are sleeved with a transmission belt, the movable frame is connected with the transmission belt, a power motor is further fixed on the rack, and a motor shaft of the power motor is connected with one of the transmission belt wheels.

Compared with the prior art, the hub cap packaging robot has the following advantages:

1. because the inner pressure ring can be supported against the inner edge of the hub cover in advance, the middle part of the protective film is adhered to the inner edge of the hub cover, then the push roller is supported against the spoke of the hub cover, the upper end of the swing rod is in an inward inclined state, the lower end of the swing rod can swing outwards, namely, the push roller rolls outwards along the spoke of the hub cover, so that the protective film is adhered to the spoke of the hub cover until the cutter is sleeved on the hub cover and is supported against the conveyor belt, at the moment, the outer pressure ring can tension the protective film, the cutter is convenient to cut off the outer edge part of the protective film, and a circular protective film is adhered to the hub cover, so that the quality and the efficiency of the envelope are.

2. Because the film pressing spring can enable the inner pressing ring to be tightly pressed on the inner edge of the hub cover when the lifting plate descends, the middle part of the protective film is positioned, and the protective film is prevented from deviating in the pushing process of the pushing roller.

3. Because the outer pressure ring descends and when being close to the conveyer belt, the tensioning lip edge can contact the protection film in advance, along with the pushing down of outer pressure ring, the tensioning lip edge can be out of shape, and the lower border of two tight lip edges can keep away from relatively promptly to with the protection film tensioning, the cutter of being convenient for excision outward flange part of protection film.

Drawings

Fig. 1 is a schematic perspective view of a hub cap packaging robot.

Fig. 2 is a structural plan view of the hub cap packing robot.

Fig. 3 is a sectional view of the structure at a-a in fig. 2.

Fig. 4 is an enlarged view of the structure at B in fig. 1.

Fig. 5 is an enlarged view of the structure at C in fig. 1.

Fig. 6 is an enlarged view of the structure at D in fig. 3.

Fig. 7 is an enlarged view of the structure at E in fig. 1.

Fig. 8 is an enlarged view of the structure at F in fig. 3.

Fig. 9 is a schematic perspective view of the film feeding mechanism.

FIG. 10 is a top view of the structure of the film feeding mechanism.

Fig. 11 is a structural sectional view of the moving frame.

Fig. 12 is an enlarged view of the structure at G in fig. 9.

Fig. 13 is an enlarged view of the structure at H in fig. 10.

Fig. 14 is an enlarged view of the structure at I in fig. 9.

Fig. 15 is an enlarged view of the structure at J in fig. 9.

Fig. 16 is an enlarged view of the structure at K in fig. 10.

Fig. 17 is a sectional view of the moving frame at L-L of fig. 2, which is close to the clamping base.

Fig. 18 is a partial sectional view of the construction of the squeeze film plate when inserted into the clamping shoe.

FIG. 19 is a partial cross-sectional view of the slit cutter as it slides into the slit.

In the figure, 1, a frame; 11. a transverse guide rod; 12. a guide shaft; 13. a power motor; 14. a drive pulley; 15. a transmission belt; 16. a support; 17. a support platen; 18. a vertical guide sleeve; 19. a lifting cylinder; 2. a conveyor belt; 21. a positioning column; 22. an annular groove; 3. a lifting plate; 31. a connecting plate; 311. connecting columns; 312. a limiting disc; 32. connecting the bosses; 33. a cutter; 34. a U-shaped plate; 341. a guide hole; 35. an outer pressure ring; 351. avoiding the notch; 352. tensioning the lip edge; 36. tensioning the spring; 37. a vertical guide rod; 4. an inner compression ring; 41. a guide bar; 411. a limiting convex edge; 42. a diaphragm spring; 5. a swing rod; 51. pushing the roller; 511. connecting grooves; 512. felt; 52. a return tension spring; 6. a clamping seat; 61. fixing the clamping plate; 611. cutting a film groove; 612. cutting a film cambered surface; 62. a movable clamping plate; 621. a transverse guide sleeve; 622. a rubber diaphragm; 623. a pushing part; 624. a connecting portion; 63. a drive plate; 631. a pin shaft; 632. a film pressing tension spring; 64. a transmission rod; 7. a movable frame; 71. a film drawing roller; 711. installing a notch; 712. a driven pulley; 72. a film pressing plate; 721. a film pressing roller; 73. a film cutter; 731. saw teeth; 74. a film penetrating gap; 75. a tension rod; 751. a tensioning arm; 752. a limiting convex part; 753. tensioning the torsion spring; 76. a transmission gear; 761. an intermediate pulley; 77. a belt; 78. a drive motor; 79. a guide sleeve; 8. a positioning roller; 81. a limiting roller; 9. a protective film roll; 91. and (5) protecting the film.

Detailed Description

The following are specific embodiments of the present invention and are further described with reference to the drawings, but the present invention is not limited to these embodiments.

As shown in fig. 1, 2 and 3, a wheel hub cover packaging robot comprises a frame 1 and a conveyor belt 2 which is arranged along the longitudinal direction and used for flatly paving a wheel hub cover, wherein the frame 1 is provided with a film feeding mechanism which can pave a protective film 91 on the wheel hub cover at the front end of the conveyor belt 2, the frame 1 is provided with a lifting plate 3 which can lift above the rear end of the conveyor belt 2, the lifting plate 3 is vertically and slidably connected with an inner pressing ring 4, a plurality of swing rods 5 are circumferentially arranged at the outer side of the inner pressing ring 4, the upper ends of the swing rods 5 are radially and inwardly inclined and hinged on the lifting plate 3, the lower ends of the swing rods 5 are rotatably connected with a push roller 51, a reset tension spring 52 which can enable the push roller 51 to be radially and inwardly pressed on the outer peripheral surface of the inner pressing ring 4 is connected between the swing rods 5 and the lifting plate 3, an annular cutter 33 is fixedly connected on the lifting plate 3, the, when the lower ends of a plurality of swing rods 5 swing outwards and expand, the cutter 33 can be pressed against the conveyor belt 2, the annular outer pressure ring 35 is connected to the cutter 33 in the circumferential direction, when the cutter 33 is pressed against the conveyor belt 2, the outer pressure ring 35 can tension the protective films 91 on the inner side and the outer side of the cutter 33 towards two sides, the hub cover is laid on the conveyor belt 2, the protective films 91 can be independently laid on the hub cover by the upper film mechanism, the hub cover is conveyed to the lower part of the lifting plate 3 by the conveyor belt 2, the lifting plate 3 descends, the inner pressure ring 4 can be pressed on the inner edge of the hub cover in advance, so that the middle part of the protective films 91 is adhered to the inner edge of the hub cover and is pressed and positioned on the middle part of the protective films 91, then the push roller 51 is abutted against the spokes of the hub cover, and along with the continuous descending of the lifting plate 3, because the upper ends of the swing, that is, the pushing roller 51 rolls outwards along the spoke of the hub cover, so that the protective film 91 is adhered to the spoke of the hub cover until the cutter 33 is sleeved on the hub cover and abuts against the conveyor belt 2, at the moment, the outer ring 35 can tension the protective film 91, the cutter 33 can cut off the outer edge part of the protective film 91 conveniently, the circular protective film 91 is adhered to the hub cover, and the film coating quality and efficiency are improved.

As shown in fig. 4, 5 and 6, the lifting plate 3 is vertically and fixedly connected with two vertical guide rods 37, the frame 1 is fixed with two vertical guide sleeves 18, the two vertical guide rods 37 are respectively slidably arranged in the two vertical guide sleeves 18, the frame 1 is also fixed with a lifting cylinder 19, and a piston rod of the lifting cylinder 19 is downward and fixedly connected with the lifting plate 3. Two guide rods 41 are vertically fixedly connected to the upper side face of the inner compression ring 4, two through holes are formed in the lifting plate 3, the two guide rods 41 respectively slide through the two through holes, a limiting convex edge 411 is arranged at the circumferential direction of the upper ends of the two guide rods 41, a film pressing spring 42 is further sleeved on the guide rods 41, the upper end of the film pressing spring 42 is abutted to the lower side face of the lifting plate 3, the lower end of the film pressing spring is abutted to the upper side face of the inner compression ring 4, the limiting convex edge 411 is abutted to the upper side face of the lifting plate 3 under the action of the film pressing spring 42, the film pressing spring 42 can enable the inner compression ring 4 to be tightly pressed on the inner edge of the hub cover when the lifting plate 3 descends, the middle part of the protective film 91 is positioned, and the. Connecting groove 511 has been seted up to the middle part circumference of push roller 51 outer peripheral face, the lower extreme of pendulum rod 5 is rotated and is connected in connecting groove 511, the parcel has felt 512 on push roller 51 outer peripheral wall, connect boss 32 has on the downside of lifter plate 3, the extension spring 52 that resets has a plurality of, these a plurality of extension springs 52 that reset and a plurality of pendulum rod 5 one-to-one, and the one end of extension spring 52 that resets is connected on connecting boss 32, the other end is connected on pendulum rod 5, the lower extreme of pendulum rod 5 has inward swinging's trend under the effect of extension spring 52 that resets, felt 512 can cover spoke full contact with wheel hub, thereby be applicable to different spoke faces.

Referring to fig. 7 and 8, the lifting plate 3 is circular, a plurality of strip-shaped connecting plates 31 are arranged on the outer edge of the lifting plate 3 along the circumferential direction, the connecting plates 31 are arranged along the radial direction, connecting columns 311 are arranged on the lower side surface of the outer end of the connecting plate 31, the cutters 33 are fixed at the lower ends of the connecting columns 311, a plurality of U-shaped plates 34 are fixed on the outer ring 35, the U-shaped plate 34 has a downward opening and is fixedly connected with the outer ring 35, the upper end of the U-shaped plate 34 is provided with a guide hole 341, the U-shaped plate 34 is slidably sleeved on the connecting column 311 through the guiding hole 341, the connecting column 311 is provided with a limiting disc 312, the connecting column 311 is also sleeved with a tension spring 36, the upper end of the tension spring 36 is abutted against the lower side surface of the connecting plate 31, the lower end is abutted against the upper side surface of the U-shaped plate 34, the U-shaped plate 34 rests against the limiting disc 312 under the action of the tensioning spring 36, the tensioning spring 36 being able to press the outer ring 35 against the conveyor belt 2 when the cutting knife 33 is lowered and abuts against the conveyor belt 2. An annular avoiding notch 351 is formed in the outer pressure ring 35 in the circumferential direction, the avoiding notch 351 penetrates through the upper side surface and the lower side surface of the outer pressure ring 35, the cutter 33 is inserted into the avoiding notch 351, when the U-shaped plate 34 abuts against the limiting disc 312, the cutting edge of the cutter 33 is located in the avoiding notch 351, two annular tensioning lip edges 352 are formed in the lower side surface of the outer pressure ring 35 in the circumferential direction, the two tensioning lip edges 352 are respectively located on the inner side and the outer side of the avoiding notch 351 and close to the avoiding notch 351, the tensioning lip edges 352 are made of rubber materials, the lower edge of the outer side of each tensioning lip edge 352 inclines outwards in the radial direction, the lower edge of the inner side of each tensioning lip edge 352 inclines inwards in the radial direction, the support bedplate 17 is horizontally fixed on the frame 1, the upper layer of the conveyor belt 2 is laid on the support bedplate 17, a plurality of stations, the outer side surface of each station of the conveyor belt 2 is further provided with an annular groove 22, the annular grooves 22 are arranged around the positioning columns 21, when the outer pressure ring 35 descends and approaches the conveyor belt 2, the tensioning lip edges 352 can be in contact with the protective film 91 in advance, the tensioning lip edges 352 can deform along with the downward pressing of the outer pressure ring 35, namely the lower edges of the two tensioning lip edges 352 can be relatively far away, so that the protective film 91 is tensioned, and the outer side surface of the protective film 91 can be conveniently cut off by the cutter 33

Referring to fig. 9, 10 and 11, the film feeding mechanism includes a positioning roller 8 for positioning the protective film roll 9, the positioning roller 8 is longitudinally disposed above the conveyor belt 2, the frame 1 is provided with strip-shaped clamping seats 6 on both sides of the conveyor belt 2, the clamping seats 6 are disposed in parallel with the positioning roller 8, the frame 1 is provided with a moving frame 7 capable of moving in the transverse direction between the two clamping seats 6, the moving frame 7 is disposed below the positioning roller 8, the moving frame 7 is rotatably connected with two film pulling rollers 71, the two film pulling rollers 71 are disposed in parallel with the positioning roller 8, a film penetrating gap 74 for the protective film 91 to pass through is formed between the two film pulling rollers 71, the film pulling rollers 71 are respectively fixed with a film pressing plate 72 and a film cutting knife 73 which are in strip shape and disposed in the length direction, when the pulling-out end of the protective film 91 is clamped by one clamping seat 6, the moving frame 7 can move to the other clamping seat 6, and the positioning roller 8 pulling the protective film 91 can rotate and press the protective film 91 into the other clamping seat 6 through the film pressing plate 72 for clamping, and when the protective film 91 is clamped by the other clamping seat 6, the positioning roller 8 can rotate reversely and cut off the part of the protective film 91 clamped by the other clamping seat 6 from the part of the protective film 91 above the conveyor belt 2 through the film cutting knife 73. The protective film reel 9 is sleeved and positioned on the positioning roller 8, one end of the protective film 91 on the protective film reel 9 is pulled out and penetrates through the film penetrating gap 74 during film laying, then the end edge of the protective film 91 is clamped in the clamping seat 6, the hub cover is placed on the conveyor belt 2, the conveyor belt 2 can convey the hub cover to the position below the film pulling roller 71, the movable frame 7 moves towards the other clamping seat, the film pulling roller 71 far away from the other clamping seat 6 can pull out the protective film 91 from the protective film reel 9, the film pulling roller 71 rotates for a set angle when the movable frame 7 is positioned above the other clamping seat 6, the film pressing plate 72 can press the protective film 91 into the other clamping seat 6 downwards and clamp the protective film, then the film pulling roller 71 rotates for a set angle in the reverse direction, the film pressing plate 72 can be pulled out from the clamping seat 6, and the film cutting knife 73 can cut off the protective film 91 paved on the hub cover, therefore, the film spreading of the hub cover is completed, the film spreading quality is good, the conveyor belt 2 conveys the hub cover to the next process, the other hub cover enters the position below the positioning roller 8, the moving frame 7 reversely moves to the position above the clamping seat 6 at the moment, namely, the film spreading of one hub cover can be completed by moving the moving frame 7 once, and the efficiency is high.

Combine fig. 12, fig. 13 to show, press from both sides tight seat 6 including all being long banding set plate 61 and moving splint 62, set plate 61 fixes on frame 1, and set plate 61's both ends are all along transversely being fixed with horizontal guide arm 11, and the both ends that move splint 62 all are fixed with horizontal guide pin bushing 621, two horizontal guide pin bushing 621 slides the cover respectively and establishes on two horizontal guide arms 11, and set plate 61 is located conveyer belt 2 and moves between splint 62, is equipped with in the frame 1 to make the press mold extension spring 632 that moves splint 62 and press on set plate 61, moves splint 62 and is fixed with rubber diaphragm 622 towards on set plate 61's the side, moves splint 62 and presss from both sides protection film 91 tightly under press mold extension spring 632's effect, and rubber diaphragm 622 can increase the clamp force to protection film 91. The frame 1 is rotatably connected with two transmission discs 63 below the conveyor belt 2, the central line direction of the two transmission discs 63 is longitudinally arranged, two ends of two movable clamping plates 62 are respectively provided with a downward connecting part 624, a transmission rod 64 is hinged on the connecting part 624, the free ends of the transmission rods 64 at the two ends of the two movable clamping plates 62 are respectively hinged on the disc surfaces of the two transmission discs 63 through pin shafts 631, two pin shafts 631 on the same transmission disc 63 are symmetrically arranged relative to the central line of the transmission discs 63, and the two pin shafts 631 are vertically distributed when the movable clamping plates 62 abut against the fixed clamping plate 61, each pin shaft 631 is connected with the film pressing tension spring 632, the other end of the film pressing tension spring 632 is connected on the frame 1, when the film pressing plate 72 pushes the movable clamping plate 62 to clamp the protective film 91, the movable clamping plate 62 can drive the transmission disc 63 to rotate through the transmission rod 64, the transmission disc 63 drives the other, so that the other movable clamping plate 62 is separated from the fixed clamping plate 61, thereby releasing the end edge of the protective film 91, and therefore the protective film 91 laid on the hub cover is reversely drawn in the process of pressing the film pressing plate 72 continuously, so that the end part of the protective film 91 is drawn out of the other clamping seat 6, and the protective film 91 is prevented from being dragged when the conveyor belt 2 is conveyed.

As shown in fig. 14 to 19, the outer peripheral surface of one side of the film-drawing roller 71 is provided with two mounting notches 711 arranged along the length direction, the film-pressing plate 72 and the film-cutting knife 73 are respectively fixed in the two mounting notches 711 by screws, the protruded edge of the film-pressing plate 72 is connected with the film-pressing roller 721 along the length direction in a rotating manner, the cutting edges of the film-pressing roller 721 and the film-cutting knife 73 are opposite in direction, the above-mentioned film-passing gap 74 is formed between the two film-pressing rollers 721 when the two film-pressing rollers 721 are opposite, the upper edge of the movable clamp plate 62 is provided with a plate-shaped pushing portion 623, the upper portion of the pushing portion 623 is inclined toward the side away from the fixed clamp plate 61, the film-pressing roller 721 can push the pushing portion 623 and is embedded between the movable clamp plate 62 and the fixed clamp plate 61 when the film-drawing roller 71 is located above the clamp base 6 and rotates until the film-pressing roller 721 faces downward, the film-pressing roller, thereby push the movable clamp plate 62, make movable clamp plate 62 separate with the fixed clamp plate 61, press mold roller 721 can press the protection film 91 in between movable clamp plate 62 and the fixed clamp plate 61, and when the press mold roller counter-rotating, press mold roller 721 outwards rolls, and the friction to protection film 91 is less, but the frictional force of rubber diaphragm 622 to protection film 91 is great, therefore between movable clamp plate 62 and the fixed clamp plate 61 that protection film 91 can stop to press from both sides tight seat 6 and press from both sides tight protection film 91 after the press mold plate 72 takes out. The upper side surface of the fixed clamping plate 61 is provided with a film cutting groove 611 along the length direction, the film cutting groove 611 is internally provided with a film cutting arc surface 612, when the film pulling roller 71 rotates reversely until the film cutting knife 73 faces downwards, the edge of the film cutting knife 73 can slide into the film cutting groove 611 along the film cutting arc surface 612, the edge of the film cutting knife 73 is uniformly provided with saw teeth 731 which protrude towards one side along the length direction, when the edge of the film cutting knife 73 slides into the film cutting groove 611, the saw teeth 731 face towards the inner side of the film cutting groove 611, the film cutting knife 73 is further provided with a tensioning rod 75 which can press the part of the protective film 91 between the film cutting knife 73 and the conveyor belt 2 onto the upper side surface of the fixed clamping plate 61 when the edge of the film cutting knife 73 slides into the film cutting groove 611, when the film pulling roller 71 rotates reversely, the film cutting knife 73 can cut into the film cutting groove 611 along the film cutting arc surface 612, and the saw teeth 731 can cut the protective film 91 in the process. The two ends of the film cutting knife 73 are hinged with tensioning arms 751 through a pin 631, the two ends of the tensioning rod 75 are respectively and fixedly connected with the free ends of the two tensioning arms 751, the hinged end of the tensioning arm 751 is also provided with a limit convex part 752, a tensioning torsion spring 753 which can enable the limit convex part 752 to abut against the side surface of the film cutting knife 73 is sleeved on the pin 631, the tensioning rod 75 is lower than the edge of the film cutting knife 73 when the limit convex part 752 abuts against the side surface of the film cutting knife 73, the tensioning rod 75 is positioned between the film cutting knife 73 and the conveyor belt 2 when the edge of the film cutting knife 73 is embedded into the film cutting groove 611, the tensioning rod 75 is pressed against the upper side surface of the fixed clamping plate 61 under the action of the tensioning torsion spring 753, the tensioning rod 75 can pre-press the protective film 91 on the upper side surface of the fixed clamping plate 61 when the film cutting knife 73 is close to the film cutting groove 611, and the tensioning rod 75 can generate friction thrust force on the protective film 91 far away from the clamping seat 6, thereby, the part of the protective film 91 between the tension rod 75 and the clamping seat is in a tight state, and the film cutter 73 is convenient to cut off.

The moving frame 7 is in a strip frame shape, the two film drawing rollers 71 are rotatably connected to the inner side of the moving frame 7, two transmission gears 76 are rotatably connected to the end portion of the moving frame 7, the two transmission gears 76 are engaged with each other, driven pulleys 712 are fixed to one ends of the two film drawing rollers 71, the two transmission gears 76 are located between the two driven pulleys 712, intermediate pulleys 761 are fixed to the two transmission gears 76, the two driven pulleys 712 are respectively connected with the two intermediate pulleys 761 through belts 77, a driving motor 78 is further fixed to the end portion of the moving frame 7, a motor shaft of the driving motor 78 is fixedly connected with one of the transmission gears 76, and the two film drawing rollers 71 synchronously and reversely rotate while the radial size is reduced through the transmission arrangement of the two transmission gears 76, the driven pulleys 712 and the intermediate pulleys 761, so that only one driving motor 78 needs to be arranged. Two guide shafts 12 are transversely fixed on the frame 1, guide sleeves 79 are fixed at two ends of the movable frame 7, the guide sleeves 79 at the two ends are respectively sleeved on the two guide shafts 12 in a sliding manner, the frame 1 is further rotatably connected with two driving belt 15 wheels 14, driving belts 15 are sleeved on the two driving belt 15 wheels 14, the movable frame 7 is connected with the driving belts 15, a power motor 13 is further fixed on the frame 1, and a motor shaft of the power motor 13 is connected with one of the driving belt 15 wheels 14. The movable frame 7 is supported and guided, and the structure is stable. The positioning roller 8 is erected on the rack 1 through the support 16, the support 16 is further rotatably connected with two limiting rollers 81, the two limiting rollers 81 are located below the positioning roller 8 and are parallel to the positioning roller 8, a gap is formed between the two limiting rollers 81, the gap between the positioning roller 8 and the two limiting rollers 81 is right opposite, the pulling-out section of the protective film 91 is inclined in the moving process of the moving frame 7, the limiting rollers 81 can limit the portion, close to the protective film winding drum 9, of the protective film 91, and interference on the protective film winding drum 9 is avoided.

Claims

1. The utility model provides a wheel hub lid packaging robot, includes frame (1) and along vertically setting up and being used for tiling conveyer belt (2) of wheel hub lid, its characterized in that, frame (1) is equipped with the last membrane mechanism that can cover protection film (91) on the wheel hub lid in conveyer belt (2) front end, frame (1) is equipped with lifter plate (3) that can go up and down above conveyer belt (2) rear end, there is interior clamping ring (4) along vertical sliding connection on lifter plate (3), the outside circumference of interior clamping ring (4) is equipped with a plurality of pendulum rods (5), and the upper end of these a plurality of pendulum rods (5) all radially inwards inclines and articulates on lifter plate (3), and the lower extreme homorotation of pendulum rod (5) is connected with and pushes away roller (51), is connected with between pendulum rod (5) and lifter plate (3) and can make push away the interior tension spring (52) that resets of pressing on interior clamping ring (4) outer peripheral face of pushing away roller (51, the lifting plate (3) is fixedly connected with an annular cutter (33), the cutter (33) is positioned below the lifting plate (3) and arranged around the swing rods (5), when the lower ends of the swing rods (5) swing outwards and expand, the cutter (33) can be pressed against the conveyor belt (2), the cutter (33) is circumferentially connected with an annular outer pressing ring (35), and when the cutter (33) is pressed against the conveyor belt (2), the outer pressing ring (35) can tension the protective films (91) on the inner side and the outer side of the cutter (33) towards two sides; go up membrane mechanism including positioning roller (8) that is used for fixing a position protection film reel (9), this positioning roller (8) are along vertically setting up in conveyer belt (2) top, frame (1) all is equipped with banding tight seat (6) of clamp in the both sides of conveyer belt (2), and presss from both sides tight seat (6) and positioning roller (8) parallel arrangement, frame (1) is equipped with between two tight seats of clamp (6) and can follows lateral shifting's removal frame (7), and this removal frame (7) are located the below of positioning roller (8), it is connected with two and draws membrane roller (71) to rotate on the removal frame (7), and these two draw membrane roller (71) all with positioning roller (8) parallel arrangement, and two draw and form between membrane roller (71) and be used for protection film (91) the film clearance (74) of passing, draw to be fixed with respectively on membrane roller (71) and be the film pressing board (72) that are banding and set up along length direction and cut membrane sword (73), when the pulling-out end of the protective film (91) is clamped by one clamping seat (6), the movable frame (7) can move to the position above the other clamping seat (6), the positioning roller (8) pulling the protective film (91) can rotate and press the protective film (91) into the other clamping seat (6) through the film pressing plate (72) for clamping, and when the protective film (91) is clamped by the other clamping seat (6), the positioning roller (8) can rotate reversely and cut off the part of the protective film (91) clamped by the other clamping seat (6) from the part of the protective film (91) above the conveyor belt (2) through the film cutting knife (73); the clamping seat (6) comprises a fixed clamping plate (61) and a movable clamping plate (62) which are all long-strip-shaped, the fixed clamping plate (61) is fixed on the frame (1), the two ends of the fixed clamping plate (61) are both transversely fixed with transverse guide rods (11), the two ends of the movable clamping plate (62) are both fixed with transverse guide sleeves (621), the transverse guide sleeves (621) are respectively sleeved on the two transverse guide rods (11) in a sliding manner, the fixed clamping plate (61) is positioned between the conveyor belt (2) and the movable clamping plate (62), the upper edge of the fixed clamping plate (61) close to the movable clamping plate (62) is provided with an arc-shaped chamfer, the movable clamping plate (62) is fixed with a rubber diaphragm (622) on the side surface of the fixed clamping plate (61) towards the movable clamping plate, the frame (1) is rotatably connected with two transmission discs (63) below the conveyor belt (2), and the central line directions of the two transmission discs (63, two ends of the two movable clamping plates (62) are hinged with transmission rods (64), free ends of the transmission rods (64) at the two ends of the two movable clamping plates (62) are hinged to the disc surfaces of the two transmission discs (63) through pin shafts (631), the two pin shafts (631) on the same transmission disc (63) are symmetrically arranged relative to the center line of the transmission disc (63), the two pin shafts (631) are vertically distributed when the movable clamping plates (62) abut against the fixed clamping plates (61), each pin shaft (631) is connected with a film pressing tension spring (632), the other end of each film pressing tension spring (632) is connected to the rack (1), and a rubber diaphragm (622) on the movable clamping plate (62) is pressed against the fixed clamping plates (61) under the action of the film pressing tension springs (632); the outer peripheral surface of one side of the film drawing roller (71) is provided with two mounting notches (711) arranged along the length direction, the film pressing plate (72) and the film cutting knife (73) are respectively fixed in the two mounting notches (711) through screws, the convex edge of the film pressing plate (72) is rotatably connected with the film pressing roller (721) along the length direction, the blade orientations of the film pressing roller (721) and the film cutting knife (73) are opposite, when the two film pressing rollers (721) are opposite, the film penetrating gap (74) is formed between the two film pressing rollers (721), the upper edge of the movable clamping plate (62) is provided with a platy pushing part (623), the upper part of the pushing part (623) inclines towards one side far away from the fixed clamping plate (61), when the film drawing roller (71) is positioned above the clamping seat (6) and rotates to the downward direction of the film pressing roller (721), the film pressing roller (721) can push the pushing part (623) and is embedded between the movable clamping plate (62) and the fixed clamping plate (61), the film cutting device is characterized in that a film cutting groove (611) is formed in the upper side face of the fixed clamping plate (61) along the length direction, a film cutting arc face (612) is arranged in the film cutting groove (611), when the film pulling roller (71) rotates reversely to the state that the film cutting knife (73) faces downwards, the edge of the film cutting knife (73) can slide into the film cutting groove (611) along the film cutting arc face (612), sawteeth (731) protruding towards one side are uniformly distributed in the edge of the film cutting knife (73) along the length direction, when the edge of the film cutting knife (73) slides into the film cutting groove (611), the sawteeth (731) face towards the inner side of the film cutting groove (611), a rod (75) capable of pressing the part of a protective film (91) between the film cutting knife (73) and the conveying belt (2) onto the upper side face of the fixed clamping plate (61) when the edge of the film cutting knife (73) slides into the film cutting groove (611) is further arranged on the film cutting knife (73), and tensioning arms (751) are hinged to two ends of the film cutting knife (73), the two ends of the tensioning rod (75) are fixedly connected with the free ends of the two tensioning arms (751), the hinged end of each tensioning arm (751) is further provided with a limiting convex part (752), a tensioning torsion spring (753) capable of enabling the limiting convex part (752) to abut against the side face of the film cutting knife (73) is sleeved on the pin shaft (631), the tensioning rod (75) is lower than the edge of the film cutting knife (73) when the limiting convex part (752) abuts against the side face of the film cutting knife (73), the tensioning rod (75) is located between the film cutting knife (73) and the conveyor belt (2) when the edge of the film cutting knife (73) is embedded into the film cutting groove (611), and the tensioning rod (75) is pressed against the upper side face of the fixed clamping plate (61) under the action of the tensioning torsion spring (753); the film drawing roller is characterized in that the moving frame (7) is in a strip frame shape, the two film drawing rollers (71) are rotatably connected to the inner side of the moving frame (7), the end part of the moving frame (7) is rotatably connected with two transmission gears (76), the two transmission gears (76) are meshed with each other, one ends of the two film drawing rollers (71) are respectively fixed with a driven belt wheel (712), the two transmission gears (76) are positioned between the two driven belt wheels (712), the two transmission gears (76) are respectively fixed with a middle belt wheel (761), the two driven belt wheels (712) are respectively connected with the two middle belt wheels (761) through belts (77), the end part of the moving frame (7) is also fixed with a driving motor (78), a motor shaft of the driving motor (78) is fixedly connected with one of the transmission gears (76), the frame (1) is transversely fixed with two guide shafts (12), and two ends of the moving frame (7) are respectively fixed with guide sleeves (79), the guide sleeves (79) at the two ends are respectively sleeved on the two guide shafts (12) in a sliding mode, the rack (1) is further rotatably connected with two transmission belt (15) wheels (14), the transmission belt (15) wheels (14) are sleeved with the transmission belt (15), the moving frame (7) is connected with the transmission belt (15), the rack (1) is further fixedly provided with a power motor (13), and a motor shaft of the power motor (13) is connected with one of the transmission belt (15) wheels (14).

2. The wheel hub cap packaging robot of claim 1, wherein two guide rods (41) are vertically and fixedly connected to the upper side surface of the inner compression ring (4), two through holes are formed in the lifting plate (3), the two guide rods (41) respectively slide through the two through holes, two limiting convex edges (411) are circumferentially arranged at the upper ends of the guide rods (41), a film pressing spring (42) is further sleeved on the guide rods (41), the upper end of the film pressing spring (42) abuts against the lower side surface of the lifting plate (3), the lower end of the film pressing spring abuts against the upper side surface of the inner compression ring (4), and the limiting convex edges (411) abut against the upper side surface of the lifting plate (3) under the action of the film pressing spring (42).

3. The hub cap packaging robot of claim 2, wherein a connecting groove (511) is formed in the circumferential direction of the middle of the outer circumferential surface of the pushing roller (51), the lower end of the swing rod (5) is rotatably connected in the connecting groove (511), a felt (512) is wrapped on the outer circumferential wall of the pushing roller (51), a connecting boss (32) is arranged on the lower side surface of the lifting plate (3), a plurality of reset tension springs (52) are arranged, the reset tension springs (52) correspond to the swing rods (5) one to one, one ends of the reset tension springs (52) are connected to the connecting boss (32), the other ends of the reset tension springs are connected to the swing rod (5), and the lower ends of the swing rods (5) have the inward swinging tendency under the action of the reset tension springs (52).

4. The wheel hub cap packaging robot as claimed in claim 3, wherein the lifting plate (3) is circular, a plurality of long-strip-shaped connecting plates (31) are circumferentially arranged at the outer edge of the lifting plate (3), the connecting plates (31) are radially arranged, connecting columns (311) are arranged on the lower side surfaces of the outer ends of the connecting plates (31), the cutter (33) is fixed at the lower ends of the connecting columns (311), a plurality of U-shaped plates (34) are fixed on the outer pressure ring (35), the openings of the U-shaped plates (34) face downwards and are fixedly connected with the outer pressure ring (35), guide holes (341) are formed in the upper ends of the U-shaped plates (34), the U-shaped plates (34) are slidably sleeved on the connecting columns (311) through the guide holes (341), limiting discs (312) are arranged on the connecting columns (311), tensioning springs (36) are further sleeved on the connecting columns (311), and the upper ends of the tensioning springs (36) are abutted against the lower side, the lower end of the U-shaped plate (34) is abutted against the upper side surface of the U-shaped plate (34), and the U-shaped plate (34) is abutted against the limiting disc (312) under the action of the tensioning spring (36).

5. The hub cap packaging robot as claimed in claim 4, wherein the outer ring (35) is circumferentially provided with an annular avoidance notch (351), the avoidance notch (351) penetrates through the upper and lower side surfaces of the outer ring (35), the cutter (33) is inserted into the avoidance notch (351), the cutting edge of the cutter (33) is located in the avoidance notch (351) when the U-shaped plate (34) abuts against the limiting disc (312), the lower side surface of the outer ring (35) is circumferentially provided with two annular tensioning lips (352), the two tensioning lips (352) are respectively located at the inner side and the outer side of the avoidance notch (351) and close to the avoidance notch (351), the tensioning lips (352) are made of rubber materials, the lower edge of the outer tensioning lip (352) inclines outwards in the radial direction, the lower edge of the inner tensioning lip (352) inclines inwards in the radial direction, the support platform plate (17) is horizontally fixed on the rack (1), the upper layer of the conveyor belt (2) is laid on the support platform plate (17), a plurality of stations are arranged on the outer side surface of the conveyor belt (2), a plurality of bolt holes for hub caps are formed in each station and sleeved on the positioning columns (21), annular grooves (22) are further formed in the outer side surface of each station of the conveyor belt (2), and the annular grooves (22) are arranged around the positioning columns (21).

6. The hub cap packaging robot according to claim 3, 4 or 5, wherein the lifting plate (3) is vertically and fixedly connected with two vertical guide rods (37), the frame (1) is fixed with two vertical guide sleeves (18), the two vertical guide rods (37) are respectively slidably arranged in the two vertical guide sleeves (18), the frame (1) is further fixed with a lifting cylinder (19), and a piston rod of the lifting cylinder (19) faces downwards and is fixedly connected with the lifting plate (3).