Green tire positioning device

Abstract

The invention relates to the field of green tire alignment, in particular to a green tire positioning device. The green tire positioning device comprises a lifting assembly, a rotating assembly and a grabbing assembly, the lifting assembly is in transmission connection with the rotating assembly so as to drive the rotating assembly to ascend and descend in the vertical direction. The rotating assembly is in transmission connection with the grabbing assembly so as to drive the grabbing assembly to rotate around a vertical axis; the grabbing assembly comprises a claw clamp and a driving mechanism; the number of the claw forceps is at least three, and the at least three claw forceps are distributed around the vertical axis at intervals and located on the circumference of the same circle with the point on the vertical axis as the circle center. The driving mechanism is in transmission connection with the claw forceps so as to drive the claw forceps to synchronously move in the radial direction of the circle. By means of the green tire positioning device, the technical problem that in the prior art, the green tire is not aligned in place is solved, and the purpose of preventing bar code information on the green tire from being damaged is achieved.

Description

Technical Field

[0001] The invention relates to the field of green tire alignment, and in particular to a green tire positioning device. Background Art

[0002] The semi-finished product before the tire is made is called a green tire. The green tire needs to be aligned before entering the vulcanization equipment to avoid damage to the barcode information on it.

[0003] The existing alignment scheme is as attached Figure 7 As shown, during alignment, the green tire entering the alignment area is first held by four sets of clamping arms 1 to ensure that the center of the green tire is located at the center of the four sets of electrically driven conical rollers 2. Then the four sets of clamping arms are released, and the green tire is rotated by the four sets of electrically driven conical rollers at the bottom, and the green tire is aligned to the agreed position according to the barcode position information scanned and read.

[0004] It should be pointed out here that in the process of the clamping arm holding the green tire, due to the plastic material and structural characteristics of the green tire, the green tire will be deformed and rebound after the clamping arm is released, resulting in horizontal displacement of the green tire on the working surface of the roller machine 3 and a large center alignment error; furthermore, in actual production, there are also errors in the clamping process of the clamping arm from the outside to the inside.

[0005] Based on the above and other reasons, when the center of the green tire cannot be aligned with the center of the four sets of electric-driven cone rollers, the four contact surfaces of the green tire and the electric-driven cone rollers will not be at the same radius of the electric-driven cone rollers. As a result, the four contact surfaces will have four different rotation speeds, and the green tire will further undergo horizontal displacement in uncertain directions during rotation, resulting in green tire alignment out of tolerance or failure. Summary of the invention

[0006] The purpose of the present invention is to provide a green tire positioning device to solve the technical problem of the green tire not being properly aligned in the prior art.

[0007] In order to solve the above technical problems, the technical solution provided by the present invention is:

[0008] The green tire positioning device provided by the present invention comprises: a lifting assembly, a rotating assembly and a grabbing assembly;

[0009] The lifting assembly is transmission-connected with the rotating assembly to drive the rotating assembly to rise and fall vertically;

[0010] The rotating assembly is in transmission connection with the grabbing assembly to drive the grabbing assembly to rotate around a vertical axis;

[0011] The grabbing assembly includes a claw and a driving mechanism;

[0012] The claws are provided with at least three claws, and the at least three claws are distributed around the vertical axis at intervals and are located on the circumference of the same circle with a point on the vertical axis as the center;

[0013] The driving mechanism is in transmission connection with the plurality of claws to drive the plurality of claws to move synchronously along the radial direction of the circle.

[0014] Further, the driving mechanism includes a spoke turntable, a driving turntable and a rotation driving assembly;

[0015] The spoke turntable is horizontally arranged and fixed to the output portion of the rotating assembly, and its axis coincides with the vertical axis;

[0016] The driving turntable is coaxially arranged with the spoke turntable and is also rotationally connected with the spoke turntable;

[0017] The driving rotary disk is provided with a plurality of arc-shaped grooves, which are distributed at intervals around the vertical axis and correspond one by one to the claws;

[0018] The claw clamp is slidably connected to the spoke turntable through a sliding structure, and the sliding path is consistent with the radial direction of the circle. The claw clamp is slidably matched with the driving turntable through the arc groove so as to be able to slide along the extension direction of the arc groove;

[0019] The rotary drive assembly is in driving connection with the driving turntable to drive the driving turntable to rotate around its own axis.

[0020] Furthermore, the claw is L-shaped, with the short section arranged horizontally and the long section arranged vertically;

[0021] The short section is connected with a cam bearing, and the bearing side surface of the cam bearing is in contact with the groove surface of the arc groove;

[0022] The sliding structure comprises a slider and a slide rail, wherein the slider is fixed to the short section, and the slide rail is fixed to the spoke turntable.

[0023] Furthermore, at least three groups of limit assemblies are fixed on the driving turntable, and the at least three groups of limit assemblies are spaced apart and distributed around the vertical axis;

[0024] The limiting assembly includes a guide seat and an upper bearing, a middle bearing and a lower bearing which are all pivotally connected to the guide seat, wherein the upper bearing has rolling friction with the upper surface of the spoke turntable, the middle bearing has rolling friction with the side surface of the spoke turntable, and the lower bearing has rolling friction with the lower surface of the spoke turntable.

[0025] Further, the rotating assembly includes a hollow rotating table, a connecting drum and a first servo motor;

[0026] The hollow rotating platform is fixed to the output portion of the lifting assembly;

[0027] The connecting drum is fixedly connected to the spoke turntable and is also connected to the inner drum rotor of the hollow rotating table;

[0028] The first servo motor is connected to the power input reducer of the hollow rotating table.

[0029] Further, the rotary drive assembly includes an arc-shaped rack, a gear and a second servo motor;

[0030] The arc-shaped rack is fixed to the driving turntable;

[0031] The gear is meshed with the arc-shaped rack;

[0032] The second servo motor is fixed to the spoke turntable, and an output shaft of the second servo motor is connected to the gear.

[0033] Furthermore, the rotating assembly also includes a flange and an electric slip ring;

[0034] The connecting drum is connected to the inner drum rotor via the flange;

[0035] The electric slip ring is fixed to the flange and electrically connected to the second servo motor.

[0036] Further, the lifting assembly includes an outer frame, a fixed platform and a linear drive component;

[0037] The fixed platform is slidably connected to the outer frame, and the sliding path extends vertically;

[0038] The rotating assembly is arranged on the fixed platform;

[0039] The linear drive assembly is arranged on the outer frame and is drivingly connected to the fixed platform.

[0040] Further, the linear drive assembly includes a lead screw, a nut and a third servo motor;

[0041] The lead screw extends vertically, and both ends thereof are rotatably connected to the outer frame;

[0042] The nut is threadedly connected to the lead screw;

[0043] The fixing platform is connected to the nut;

[0044] The third servo motor is fixed to the outer frame, and its output shaft is connected to the lead screw through a coupling.

[0045] Furthermore, the linear drive assembly also includes a connecting sleeve and a connecting shaft;

[0046] The connecting sleeve is sleeved on the nut and fixedly connected to the nut;

[0047] The connecting shaft is rotatably connected to the connecting sleeve via an outer spherical bearing, and both ends of the connecting shaft are fixed to the fixed platform.

[0048] Compared with the prior art, the green tire positioning device provided by the present invention has the following beneficial effects:

[0049] In the raw tire positioning device, the lifting assembly drives the rotating assembly and the grasping assembly to descend as a whole, so that multiple claws can be inserted into the inner ring of the raw tire; driven by the driving mechanism, the multiple claws can move synchronously outward in the radial direction and contact with the edge of the inner ring of the raw tire to achieve the grasping of the raw tire; after the grasping is completed, the lifting assembly drives the rotating assembly and the grasping assembly to rise as a whole, and the raw tire rises synchronously with the claws; after rising to the right position, the rotating assembly is started, and the raw tire is indirectly rotated around its own axis through the grasping assembly, and at the same time, the relevant scanning instrument attempts to read the barcode of the raw tire and judge the position information of the barcode, so that the raw tire can be rotated to a preset angle position; after the raw tire is rotated into place, the lifting assembly drives the raw tire to descend, and then the driving mechanism drives the multiple claws to move synchronously inward in the radial direction to put down the raw tire. At this point, the raw tire is aligned.

[0050] It can be seen that compared with the prior art, the green tire positioning device can avoid horizontal deviation of the green tire and ensure that the green tire can be effectively aligned. In addition, by extending and retracting multiple claws to grab and release the green tire, green tires of different specifications can be aligned, thereby improving the scope of application.

[0051] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, preferred embodiments are given below and described in detail with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0052] In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the related technologies, the drawings required for use in the specific embodiments or the related technical descriptions will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0053] Figure 1 A schematic diagram of an application of a green tire positioning device provided by an embodiment of the present invention;

[0054] Figure 2 A schematic diagram of the structure of a lifting assembly provided by an embodiment of the present invention;

[0055] Figure 3 for Figure 2 The enlarged view of point Ⅰ;

[0056] Figure 4 An exploded view of the connection between the lead screw and the nut in the lifting assembly provided in an embodiment of the present invention;

[0057] Figure 5 A schematic diagram of the structure of the connection between the rotating assembly and the grabbing assembly provided in an embodiment of the present invention;

[0058] Figure 6 A schematic diagram of the structure of a grab assembly provided in an embodiment of the present invention;

[0059] Figure 7 It is a top view of the existing alignment mechanism.

[0060] icon:

[0061] 1-clamping arm; 2-electrically driven cone roller; 3-roller machine;

[0062] 100-lifting assembly; 110-outer frame; 120-fixed platform; 130-screw; 140-nut; 150-third servo motor; 160-connecting sleeve; 170-connecting shaft; 180-outer spherical bearing;

[0063] 200-rotating assembly; 210-hollow rotating table; 220-connecting drum; 230-first servo motor; 240-flange; 250-electric slip ring;

[0064] 300-grasping assembly; 310-claw clamp; 320-driving mechanism; 330-limiting assembly; 321-spoke turntable; 322-driving turntable; 323-cam bearing; 324-sliding block; 325-slide rail; 326-arc rack; 327-gear; 328-second servo motor; 331-guide seat; 332-upper bearing; 333-middle bearing; 334-lower bearing; 3221-arc groove;

[0065] 400-green tire. DETAILED DESCRIPTION

[0066] The technical solution of the present invention will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0067] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0068] In the description of the present invention, it should be noted that the terms "center", "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance. Physical quantities in formulas, if not separately marked, should be understood as basic quantities of the base units of the International System of Units, or derived quantities derived from the basic quantities through mathematical operations such as multiplication, division, differentiation or integration.

[0069] In addition, the terms "horizontal", "vertical", "overhanging" and the like do not mean that the components are required to be absolutely horizontal or overhanging, but can be slightly tilted. For example, "horizontal" only means that its direction is more horizontal than "vertical", and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0070] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0071] In conjunction with the accompanying drawings, some embodiments of the present invention are described in detail below. In the absence of conflict, the following embodiments and features in the embodiments may be combined with each other.

[0072] In the existing green tire alignment scheme, the center of the green tire and the center of the four sets of electrically driven conical rollers cannot be guaranteed to be aligned, resulting in the four contact surfaces of the green tire and the electrically driven conical rollers not being at the same radius of the electrically driven conical rollers. The four contact surfaces have four different rotation speeds, which in turn causes the green tire to undergo horizontal displacement in an uncertain direction during rotation, resulting in alignment errors or failure.

[0073] In view of this, an embodiment of the present invention provides a raw tire positioning device, which includes: a lifting assembly 100, a rotating assembly 200 and a grabbing assembly 300; the lifting assembly 100 is transmission-connected to the rotating assembly 200 to drive the rotating assembly 200 to rise and fall vertically; the rotating assembly 200 is transmission-connected to the grabbing assembly 300 to drive the grabbing assembly 300 to rotate around a vertical axis; the grabbing assembly 300 includes a claw 310 and a driving mechanism 320; the claw 310 is provided with at least three claws 310, and at least three claws 310 are distributed at intervals around the vertical axis and are located on the circumference of the same circle with a point on the vertical axis as the center; the driving mechanism 320 is transmission-connected to the multiple claws 310 to drive the multiple claws 310 to move synchronously along the radial direction of the circle.

[0074] In the green tire positioning device, the lifting assembly 100 drives the rotating assembly 200 and the grabbing assembly 300 to descend as a whole, so that the multiple claws 310 can be inserted into the inner ring of the green tire 400; driven by the driving mechanism 320, the multiple claws 310 can move synchronously outward in the radial direction, and contact with the edge of the inner ring of the green tire 400 to achieve the grasping of the green tire 400; after the grasping is completed, the lifting assembly 100 drives the rotating assembly 200 and the grabbing assembly 300 to rise as a whole, and the green tire 400 rises synchronously with the claws 310; after rising to the right position, the rotating assembly 200 is started, and indirectly through the grabbing assembly 300 causes the raw tire 400 to rotate around its own axis, and at the same time, the relevant scanning equipment attempts to read the barcode of the raw tire 400 and judge the position information of the barcode, so that the raw tire 400 can be rotated to a preset angle position; after the raw tire 400 is rotated into place, the lifting assembly 100 drives the raw tire 400 to descend, and then the driving mechanism 320 drives the multiple claws 310 to move synchronously inward along the radial direction to put down the raw tire 400. At this point, the raw tire 400 is aligned; finally, the lifting assembly 100 drives the rotating assembly 200 and the grabbing assembly 300 to rise and reset as a whole, waiting for the next alignment of the raw tire 400.

[0075] It can be seen that compared with the prior art, the raw tire positioning device can prevent the raw tire 400 from horizontally offset, ensuring that the raw tire 400 can be effectively aligned. In addition, by extending and retracting multiple claws 310 to grab and release the raw tire 400, raw tires 400 of different specifications can be aligned, thereby improving the scope of application.

[0076] The following combination Figures 1 to 6 The structure and shape of the green tire positioning device provided in this embodiment are described in detail:

[0077] Regarding the lifting assembly 100, specifically:

[0078] refer to Figures 1 to 4The lifting assembly 100 includes an outer frame 110, a fixed platform 120 and a linear drive assembly; the fixed platform 120 is slidably connected to the outer frame 110, and the sliding path extends vertically; the rotating assembly 200 is arranged on the fixed platform 120; the linear drive assembly is arranged on the outer frame 110 and is transmission-connected to the fixed platform 120.

[0079] Specifically, the fixed platform 120 is located inside the outer frame 110, on which four sliders 324 are fixed, and guide rails matching the sliders 324 are fixed on the two vertical rods of the outer frame 110; optionally, the linear drive assembly includes a lead screw 130, a nut 140 and a third servo motor 150; the lead screw 130 extends vertically, and its upper and lower ends are rotatably connected to the outer frame 110; the nut 140 is threadedly connected to the lead screw 130; the fixed platform 120 is connected to the nut 140; the third servo motor 150 is fixed to the outer frame 110, and its output shaft is connected to the lead screw 130 through a coupling.

[0080] When the third servo motor 150 is running, it drives the lead screw 130 to rotate around its own axis, and the nut 140 moves upward or downward under the restriction of the fixed platform 120, thereby driving the fixed platform 120 to rise and fall, and then the rotating assembly 200 and the grabbing assembly 300 can realize the movement in the plumb direction.

[0081] Preferably, reference Figure 3 and Figure 4 The linear drive assembly also includes a connecting sleeve 160 and a connecting shaft 170; the connecting sleeve 160 is sleeved on the nut 140 and fixedly connected to the nut 140; the connecting shaft 170 is rotatably connected to the connecting sleeve 160 through an outer spherical bearing 180, and its two ends are fixed to the fixed platform 120.

[0082] With the above design, although the center of gravity of the whole composed of the fixed platform 120, the rotating assembly 200 and the grabbing assembly 300 is not on the axis of the nut 140, the whole can rotate slightly forward around the axis of the connecting shaft 170. In this way, the coincidence of the axis of the nut 140 and the axis of the screw 130 is ensured, thereby solving the problem of the nut 140 moving jammed due to excessive cantilever of the mechanism, production and installation tolerances, and enabling the fixed platform 120 to smoothly drive the rotating assembly 200 and the grabbing assembly 300 to rise and fall.

[0083] Regarding the grab assembly 300, specifically:

[0084] refer to Figure 5 and Figure 6In one embodiment of the present application, the driving mechanism 320 includes a spoke turntable 321, a driving turntable 322 and a rotation driving assembly; the spoke turntable 321 is horizontally arranged and fixed to the output portion of the rotating assembly 200, and its axis coincides with the vertical axis; the driving turntable 322 is coaxially arranged with the spoke turntable 321 and is also rotationally connected to the spoke turntable 321; a plurality of arc grooves 3221 are provided on the driving turntable 322, and the plurality of arc grooves 3221 are spaced apart around the vertical axis, And it corresponds one to one with the claw clamp 310; more preferably, the arc groove 3221 and the claw clamp 310 are each provided with 6; the claw clamp 310 and the spoke turntable 321 are slidingly connected through a sliding structure, and the sliding path is consistent with the radial direction of the circle, and the claw clamp 310 and the driving turntable 322 are slidingly matched through the arc groove 3221 so as to be able to slide along the extension direction of the arc groove 3221; the rotation drive assembly is transmission-connected to the driving turntable 322 to drive the driving turntable 322 to rotate around its own axis.

[0085] Continue to refer Figure 5 and Figure 6 The claw clamp 310 is L-shaped, with its short section arranged horizontally and the long section arranged vertically; the short section is connected to a cam bearing 323, and the bearing side of the cam bearing 323 contacts the groove surface of the arc groove 3221; the sliding structure includes a slider 324 and a slide rail 325, wherein the slider 324 is fixed to the short section, and the slide rail 325 is fixed to the spoke turntable 321.

[0086] As mentioned above, optionally, the rotation drive assembly includes an arc-shaped rack 326, a gear 327 and a second servo motor 328; the arc-shaped rack 326 is fixed to the driving turntable 322; the gear 327 is meshed with the arc-shaped rack 326; the second servo motor 328 is fixed to the spoke turntable 321, and its output shaft is connected to the gear 327.

[0087] Combination Figure 1 and Figure 6 As shown, when the second servo motor 328 is running, the driving turntable 322 rotates around its own axis under the transmission of the gear 327 and the arc-shaped rack 326; if it rotates counterclockwise (the end of the arc-shaped groove 3221 close to the center of the driving turntable 322 is the first end, and the other end is the second end), the first end gradually approaches the cam bearing 323, and at the same time, the groove surface of the arc-shaped groove 3221 rolls and rubs with the cam bearing 323, so that the groove surface of the arc-shaped groove 3221 can smoothly push the cam bearing 32 3 moves outward along the radial direction of the driving rotary disk 322, that is, the claw clamp 310 slides outward synchronously; if it rotates clockwise, the second end gradually approaches the cam bearing 323, so that the groove surface of the arc groove 3221 pushes the cam bearing 323 to move inward along the radial direction of the driving rotary disk 322, that is, the claw clamp 310 slides inward synchronously; when the claw clamp 310 slides outward, the multiple claw clamps 310 cooperate to grasp the green tire 400, and when the claw clamp 310 slides inward, the green tire 400 is released.

[0088] It should be added that in other embodiments, the driving mechanism 320 can use the principle of a three-jaw chuck to drive the multiple claws 310 to move. The specific structure is not explained here and reference may be made to the prior art.

[0089] In this embodiment, reference Figure 5 and Figure 6 At least three groups of limit assemblies 330 are fixed on the driving turntable 322, and the at least three groups of limit assemblies 330 are spaced apart around the vertical axis; the limit assemblies 330 include a guide seat 331 and an upper bearing 332, a middle bearing 333 and a lower bearing 334 which are all pivotally connected to the guide seat 331, wherein the upper bearing 332 has rolling friction with the upper surface of the spoke turntable 321, the middle bearing 333 has rolling friction with the side of the spoke turntable 321, and the lower bearing 334 has rolling friction with the lower surface of the spoke turntable 321.

[0090] The above design ensures the coaxiality of the driving turntable 322 and the spoke turntable 321, so that the rotation axis of the driving turntable 322 coincides with the center of the circle where the multiple claws 310 are located. In this way, when the driving turntable 322 rotates, it can ensure that the multiple claws 310 can be smoothly expanded or retracted at the same time; in addition, the stability of the connection between the driving turntable 322 and the spoke turntable 321 is also guaranteed.

[0091] Regarding the rotating assembly 200, specifically:

[0092] refer to Figure 5 The rotating assembly 200 includes a hollow rotating table 210, a connecting drum 220 and a first servo motor 230; the hollow rotating table 210 is fixed to the output part of the lifting assembly 100; the connecting drum 220 is fixedly connected to the spoke turntable 321, and is also connected to the inner drum rotor of the hollow rotating table 210; the first servo motor 230 is connected to the power input reducer of the hollow rotating table 210.

[0093] Specifically, the hollow rotating table 210 is an existing structure, including a power input reducer, an outer cylinder seat and an inner cylinder rotor, wherein the outer cylinder seat is fixed to the fixed platform 120, and the inner cylinder rotor can rotate around its own axis in the outer cylinder seat, and a flange 240 is provided thereon, and is fixedly connected to the outer ring of the flange 240; the first servo motor 230 is fixed to the fixed platform 120, and its output end is connected to the power input reducer; the top end of the connecting drum 220 is fixedly connected to the inner ring of the flange 240, and the bottom end is fixedly connected to the spoke turntable 321.

[0094] Combination Figure 1 and Figure 5As shown, when the first servo motor 230 is running, the inner drum rotor rotates, and drives the connecting drum 220 to rotate through the flange 240, thereby causing the spoke turntable 321 to rotate around its own axis, and the grabbing assembly 300 rotates as a whole.

[0095] Preferably, reference Figure 1 and Figure 5 The flange 240 is provided with an electric slip ring 250, the rotor part of the electric slip ring 250 is fixed to the top of the flange 240, and the stator part is installed on the fixed platform 120 through a bracket; the power line and signal control line of the second servo motor 328 pass through the connecting drum 220 and are connected to the rotor part. With such a design, when the grab assembly 300 rotates freely at 360°, the power line and signal control line of the second servo motor 328 can be prevented from being damaged due to torsion, thereby ensuring the effectiveness of the electrical connection of the second servo motor 328.

[0096] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A green tire positioning device, characterized in that: include: A lifting assembly (100), a rotating assembly (200) and a grabbing assembly (300); The lifting assembly (100) is transmission-connected to the rotating assembly (200) to drive the rotating assembly (200) to rise and fall vertically; The rotating assembly (200) is transmission-connected to the grabbing assembly (300) to drive the grabbing assembly (300) to rotate around a vertical axis; The grabbing assembly (300) comprises a claw (310) and a driving mechanism (320); The claw clamps (310) are provided with at least three pieces, and the at least three claw clamps (310) are distributed at intervals around the vertical axis and are located on the circumference of the same circle with a point on the vertical axis as the center; The driving mechanism (320) is transmission-connected to the plurality of claws (310) to drive the plurality of claws (310) to move synchronously along the radial direction of the circle.

2. The green tire positioning device according to claim 1, characterized in that: The driving mechanism (320) comprises a spoke turntable (321), a driving turntable (322) and a rotation driving assembly; The spoke turntable (321) is arranged horizontally and fixed to the output portion of the rotating assembly (200), and its axis coincides with the vertical axis; The driving turntable (322) is coaxially arranged with the spoke turntable (321), and is also rotationally connected with the spoke turntable (321); The driving rotary disk (322) is provided with a plurality of arc-shaped grooves (3221), the plurality of arc-shaped grooves (3221) are distributed at intervals around the vertical axis and correspond one to one with the claws (310); The claw clamp (310) and the spoke turntable (321) are slidably connected via a sliding structure, and the sliding path is consistent with the radial direction of the circle. The claw clamp (310) and the driving turntable (322) are slidably matched via the arc groove (3221) so as to be able to slide along the extension direction of the arc groove (3221); The rotary drive assembly is in driving connection with the driving turntable (322) to drive the driving turntable (322) to rotate around its own axis.

3. The green tire positioning device according to claim 2, characterized in that: The claw clamp (310) is L-shaped, with a short section arranged horizontally and a long section arranged vertically; The short section is connected to a cam bearing (323), and a bearing side surface of the cam bearing (323) is in contact with a groove surface of the arc-shaped groove (3221); The sliding structure comprises a slider (324) and a slide rail (325), wherein the slider (324) is fixed to the short section, and the slide rail (325) is fixed to the spoke rotating disk (321).

4. The green tire positioning device according to claim 2, characterized in that: At least three groups of position limiting components (330) are fixed on the driving rotary disk (322), and the at least three groups of position limiting components (330) are distributed at intervals around the vertical axis; The limiting assembly (330) comprises a guide seat (331) and an upper bearing (332), a middle bearing (333) and a lower bearing (324) which are all pivotally connected to the guide seat (331), wherein the upper bearing (332) and the upper surface of the spoke turntable (321) are in rolling friction, the middle bearing (333) and the side surface of the spoke turntable (321) are in rolling friction, and the lower bearing (324) and the lower surface of the spoke turntable (321) are in rolling friction.

5. The green tire positioning device according to claim 2, characterized in that: The rotating assembly (200) comprises a hollow rotating platform (210), a connecting rotating drum (220) and a first servo motor (230); The hollow rotating platform (210) is fixed to the output portion of the lifting assembly (100); The connecting rotating drum (220) is fixedly connected to the spoke rotating disk (321), and is also connected to the inner drum rotor of the hollow rotating platform (210); The first servo motor (230) is connected to the power input reducer of the hollow rotating platform (210).

6. The green tire positioning device according to claim 5, characterized in that: The rotary drive assembly comprises an arc-shaped rack (326), a gear (327) and a second servo motor (328); The arc-shaped rack (326) is fixed to the driving rotary disk (322); The gear (327) is meshed with the arc-shaped rack (326); The second servo motor (328) is fixed to the spoke turntable (321), and its output shaft is connected to the gear (327).

7. The green tire positioning device according to claim 6, characterized in that: The rotating assembly (200) further includes a flange (240) and an electric slip ring (250); The connecting drum (220) is connected to the inner drum rotor via the flange (240); The electric slip ring (250) is fixed to the flange (240) and is electrically connected to the second servo motor (328).

8. The green tire positioning device according to claim 1, characterized in that: The lifting assembly (100) comprises an outer frame (110), a fixed platform (120) and a linear drive component; The fixed platform (120) is slidably connected to the outer frame (110), and a sliding path extends vertically; The rotating assembly (200) is arranged on the fixed platform (120); The linear drive assembly is arranged on the outer frame (110) and is drivingly connected to the fixed platform (120).

9. The green tire positioning device according to claim 8, characterized in that: The linear drive assembly comprises a lead screw (130), a nut (140) and a third servo motor (150); The lead screw (130) extends vertically, and both ends thereof are rotatably connected to the outer frame (110); The nut (140) is threadedly connected to the lead screw (130); The fixing platform (120) is connected to the nut (140); The third servo motor (150) is fixed to the outer frame (110), and its output shaft is connected to the lead screw (130) via a coupling.

10. The green tire positioning device according to claim 9, characterized in that: The linear drive assembly also includes a connecting sleeve (160) and a connecting shaft (170); The connecting sleeve (160) is sleeved on the nut (140) and fixedly connected to the nut (140); The connecting shaft (170) is rotatably connected to the connecting sleeve (160) via an outer spherical bearing (180), and both ends of the connecting shaft (170) are fixed to the fixed platform (120).

Images