3-DIMENSIONAL STRIP WINDING SYSTEM FOR SPECIAL GIANT ALL-STEEL RADIAL OTR TIRE

Abstract

3-D Strip Winding System for a special giant all-steel radial OTR tire comprising: a movable base plate, a pivoting device, a support, a winding and applying device, and a bracket. The pivoting device comprises a spin orbit of an external gear ring, a positioning and rotating inner race, a support plate, a servo motor, and a drive gear. The spin orbit of an external gear ring is fixed on the plane of movable base plate. The positioning and rotating inner race is flexibly attached inside the spin orbit of an external gear ring. One end of the support plate is fixed to the positioning and rotating inner race. The servo motor is fixedly disposed on the support plate, the output end of which is connected with the drive gear after passing through the support plate. The drive gear is engaged with the outer edge of the spin orbit of the external gear ring.

Description

CROSS-REFERENCE TO RELATED APPLICATIONS

This application claims priority benefits to Chinese Patent Application No. 200810052989.5 filed on May 5, 2008, the contents of all of the aforementioned specifications are incorporated herein by reference.

BACKGROUND OF THE INVENTION

1. Field of the Invention

The invention relates to a tread winding system for rubber tire machinery, and more particularly to a 3-dimensional strip winding system for a special giant all-steel radial OTR tire.

2. Description of the Related Art

Giant tires, and special giant all-steel OTR (Off The Road) tires are widely used. These tires have large diameter, wide cross section, thick tread, and different winding shape from that of general radial OTR tires. They also require higher winding and applying accuracy than general radial OTR tires. Therefore, traditional winding systems only applicable to general radial OTR tires cannot be used with special giant all-steel OTR tires.

SUMMARY OF THE INVENTION

In view of the above-described problems, it is one objective of the invention to provide a 3-D strip winding system for special giant all-steel radial OTR tires, featuring high accuracy, flexible adaption to different winding shapes, and safe and easy operation.

To achieve the above objectives, in accordance with one embodiment of the invention, provided is a 3-D strip winding system for a special giant all-steel radial OTR tire, comprising: a movable base plate, a pivoting device, a support, a winding and applying device, and a bracket. The winding and applying device is fixed on the support, which is flexibly connected to the pivoting device. The pivoting device is rotatably connected with the movable base plate. The bracket operates to minimize stretch of a rubber strip, whose output end is disposed on the support.

The pivoting device comprises: a spin orbit of an external gear ring, a positioning and rotating inner race, a support plate, a servo motor, and a drive gear. The spin orbit of an external gear ring is fixed on the upper surface plane of the movable base plate. The positioning and rotating inner race is flexibly attached inside the spin orbit of the external gear ring. One end of the support plate is fixed to the positioning and rotating inner race. The drive servo motor is rigidly disposed on the support plate, whose output end is connected to the drive gear after passing through the support plate. The drive gear is engaged with the outer edge of the spin orbit for the external gear ring.

The winding and applying device comprises: a floating guide, an applying and stitching roller, a drive unit for the applying and stitching roller cylinder, a support for the applying and stitching roller, a non-return device, a cutter, an air discharging roller, and a tachometer device. All above-mentioned units are installed on a supported plate of the support. The drive unit for the applying and stitching roller cylinder is connected to a lower front portion of the floating guide. The support for the applying and stitching roller is fixed at the front end of the drive unit for the applying and stitching roller cylinder. The non-return device is flexibly connected to the upper end of the support. The applying and stitching roller is rotatably disposed at the lower end of the support. The cutter is connected to the bottom of the applying and stitching roller. The air discharging roller is disposed below the cutter. The tachometer device is fixedly disposed below the air discharging roller.

The tachometer device comprises: a tachometer roller, an encoder, a link, a cylinder bracket, a cylinder, a cylinder hinged support, a rail adapter, rails, and slide blocks. The tachometer roller is installed at the front end of the link. The encoder is fixed at the side of the tachometer roller. The cylinder bracket is fixedly connected to the link. The output end of the cylinder is hinged with the cylinder bracket, and the input end of the cylinder is flexibly connected to the hinged support. The rails are placed rigidly below the rail adapter. The slide blocks are disposed at a predetermined position on the rails and are fastened to the link.

The bracket comprises: a group of telescopic rods for bracket, a group of servo drive rollers for strip transportation, and a group of follow-up guide rollers. The servo drive rollers for strip transportation and the follow-up guide rollers are installed at a proper position of the telescopic rods. The front end of the bracket is connected to the support and the back end to the movable base plate.

Advantages of the invention include:

1) the tachometer device can detect in real time the line speed of carcass joint point by PLC control, making the line speed of carcass match that of strip transportation, thus improving the uniformity of applied strip on the built carcass and guarantee the precision requirements;

2) the non-return device is able to prevent effectively the rubber strip from moving back after winding and cutting;

3) the servo drive rollers for strip transportation can greatly reduce, at multiple spots, friction between the strip and the follow-up guide rollers during the long travel of strip transportation, decreasing the excessive stretch of strip during transportation and improving the quality of winding and applying.

BRIEF DESCRIPTION OF THE DRAWINGS

Detailed description will be given below with reference to accompanying drawings, in which

FIG. 1 is a schematic diagram of a 3-D strip winding system for a special giant all-steel radial OTR tire according to one embodiment of the invention;

FIG. 2 is a front view of a pivoting device according to one embodiment of the invention as shown in FIG. 1;

FIG. 3 is a partial enlargement of a pivoting device according to one embodiment of the invention as shown in FIG. 2;

FIG. 4 is a schematic diagram of a strip winding and applying device according to one embodiment of the invention;

FIG. 5 is an “A” direction side view according to one embodiment of the invention as shown in FIG. 4;

FIG. 6 is a bottom view of a tachometer device according to one embodiment of the invention; and

FIG. 7 is a schematic diagram of a strip transportation bracket according to one embodiment of the invention.

Legend: 1. Movable base plate, 2. Pivoting device, 2-1. Spin orbit of an external gear ring, 2-2. Positioning and rotating inner race, 2-3. Supported plate of pivoting device, 2-4. Drive gear, 2-5. Servo motor, 3. Support, 3-1. Supported plate of the support, 4. Winding and applying device, 4-1. Floating guide, 4-2. Drive unit for an applying and stitching roller cylinder, 4-3. Support for an applying and stitching roller, 4-4. non-return device, 4-5. applying and stitching roller, 4-6. Cutter, 4-7. Air discharging roller, 4-8. Tachometer device, 4-8-1. Tachometer roller, 4-8-2. Encoder, 4-8-3. Link, 4-8-4. Cylinder bracket, 4-8-5. Cylinder, 4-8-6. Cylinder hinged support, 4-8-7. Rail adapter, 4-8-8. Rails, 4-8-9. Slide blocks, 5. Bracket, 5-1. Telescopic rod, 5-2. Servo drive roller for strip transportation, 5-3. Follow-up guide roller.

DETAILED DESCRIPTION OF THE EMBODIMENTS

As shown in FIGS. 1-3, a 3-D strip winding system for a special giant all-steel radial OTR tire comprises a movable base plate 1, a pivoting device 2, a support 3, a winding and applying device 4 and a bracket 5. The winding and applying device 4 is fixed on the support 3. The support 3 is flexibly connected to the pivoting device 2. The pivoting device 2 is rotatably connected to the movable base plate 1. The bracket 5 operates to minimize stretch of a rubber strip, whose output end is disposed on the support 3. The pivoting device 2 comprises a spin orbit of an external gear ring 2-1, a positioning and rotating inner race 2-2, a support plate 2-3, a servo motor 2-5 and drive gear 2-4. The spin orbit of an external gear ring 2-1 is fixed on the plane of the movable base plate 1. The positioning and rotating inner race 2-2 is flexibly attached inside the spin orbit of an external gear ring 2-1. One end of the support plate 2-3 is fixed to the positioning and rotating inner race 2-2. The drive servo motor 2-5 is rigidly disposed on the support plate 2-3, whose output end is connected to the drive gear 2-4 after passing through the support plate. The drive gear 2-4 is engaged with the outer edge of the spin orbit of an external gear ring 2-1.

As shown in FIG. 4, the winding and applying device 4 comprises: a floating guide 4-1, an applying and stitching roller 4-5, a drive unit for the applying and stitching roller cylinder 4-2, a support for the applying and stitching roller 4-3, a non-return device 4-4, a cutter 4-6, an air discharging roller 4-7, and a tachometer device 4-8. All above-mentioned units are installed on a supported plate of the support 3-1. The drive unit for the applying and stitching roller cylinder 4-2 is connected to a lower front portion of the floating guide 4-1. The support for the applying and stitching roller 4-3 is fixed at the front end of the drive unit for the applying and stitching roller cylinder 4-2. In the embodiment, the support for the applying and stitching roller is substantially in a triangular shape. The non-return device 4-4 comprises a group of non-return rods, one end of which is a wedge shape, and the other end is flexibly connected to the upper end of the support for the applying and stitching roller 4-3. The wedge-shaped end falls down naturally through gravity against the applying and stitching roller 4-5, wherein the tip of the wedge shape touches the applying and stitching roller 4-5. The applying and stitching roller 4-5 is rotatably disposed at the bottom of the support for an applying and stitching roller 4-3. The cutter 4-6 is connected to the bottom of the applying and stitching roller 4-5. The air discharging roller 4-7 is disposed below the cutter 4-6. The tachometer device 4-8 is fixedly disposed below the air discharging roller 4-7.

As shown is FIGS. 5 and 6, the tachometer device comprises: a tachometer roller 4-8-1, an encoder 4-8-2, a link 4-8-3, a cylinder bracket 4-8-4, a cylinder 4-8-5, a cylinder hinged support 4-8-6, rail adapters 4-8-7, rails 4-8-8 and slide blocks 4-8-9. The tachometer roller 4-8-1 is installed at front end of the link 4-8-3. The encoder 4-8-2 is fixed at side of the tachometer roller 4-8-1. The cylinder bracket 4-8-4 is fixedly connected to the link 4-8-3. The output end of the cylinder 4-8-5 is hinged with the cylinder bracket 4-8-4, and the input end of the cylinder 4-8-5 is flexibly connected to the hinged support 4-8-6. The rails 4-8-8 are placed rigidly below the rail adapter 4-8-7. The slide blocks 4-8-9 are disposed on a predetermined position of the rails 4-8-8 and are fastened to the link 4-8-3.

As shown in FIGS. 1 and 7, the bracket comprises: a group of telescopic rod for bracket 5-1, a group of servo drive rollers for strip transportation 5-2, a group of follow-up guide rollers 5-3. The servo drive rollers for strip transportation 5-2 and the follow-up guide rollers 5-3 are installed at a proper position of telescopic rod 5-1 for bracket. The front end of the bracket 5 is connected to the support 3 and the back end to the movable base plate 1.

The 3-D strip winding system for a special giant all-steel radial OTR tire of the invention operates as follows:

According to required size and winding shape of the green tire, adjust the transversal and longitudinal adjusting unit on the movable base plate to allow the winding and applying device to run in compliance with the tread profile. Then, adjust the pivoting device so as to meet the turning radian required between the sidewall and the crown. The rubber strip is fed onto the bracket by previous sequence, as per technical requirements. The strip has to be transported onto the winding and applying device after passing through the guide rollers on the bracket. By the help of the floating guide rollers, the strip is wound and applied, from applying and stitching roller, to the preset position of the green tire. The applying and stitching of the green tire is completed by the applying and stitching roller and the air discharging roller, which is used in conjunction with the movable base plate and the pivoting device to finish the winding and applying of the required shape for the green tire. During winding and applying, the tachometer device can detect in real time the rotational speed of the green tire so that the rotational speed of the green tire can be adjusted to match that of strip transportation. After winding and applying, the strip is cut by a cutter. Since the applied strip on the applying and stitching roller is also underneath the non-return device, it is possible to slightly insert a wedged-shape tip into the strip to push forward the strip; thus, the strip does not move back, which is convenient for next operation.

While particular embodiments of the invention have been shown and described, it will be obvious to those skilled in the art that changes and modifications may be made without departing from the invention in its broader aspects, and therefore, the aim in the appended claims is to cover all such changes and modifications as fall within the true spirit and scope of the invention.

Claims

1. A 3-D strip winding system for a special giant all-steel radial OTR tire, comprising: wherein

a movable base plate;

a pivoting device;

a support;

a winding and applying device; and

a bracket for minimizing stretch of a rubber strip, said bracket having an output end;

said winding and applying device is fixed on said support;

said support is flexibly connected to said pivoting device;

said pivoting device is rotatably connected to said movable base plate; and

said output end is disposed on said support.

2. The 3-D strip winding system of claim 1, wherein

said pivoting device comprises a spin orbit for an external gear ring, a positioning and rotating inner race, a support plate, a servo motor, and a drive gear;

said spin orbit for an external gear ring is fixed on the upper surface plane of said movable base plate;

said positioning and rotating inner race is flexibly attached inside said spin orbit for an external gear ring;

one end of said support plate is fixedly connected to said positioning and rotating inner race;

said drive servo motor is fixedly disposed on said support plate;

an output shaft of said drive servo motor passes through said support plate and is fixedly connected to said drive gear; and

said drive gear is engaged with an outer edge of said spin orbit of an external gear ring.

3. The 3-D strip winding system of claim 1, wherein

said winding and applying device comprises a floating guide, an applying and stitching roller, a drive unit for the applying and stitching roller cylinder, a support for the applying and stitching roller, a non-return device, a cutter, an air discharging roller, and a tachometer device, all connected to said supported plate of the support;

said drive unit for the applying and stitching roller cylinder is connected to a lower front portion of said floating guide;

said support for the applying and stitching roller is fixedly connected to the front end of said drive unit for the applying and stitching roller cylinder;

said non-return device is flexibly connected to an upper end of said support;

said applying and stitching roller is rotatably disposed at the bottom of said support;

said cutter is connected to the bottom of said applying and stitching roller;

said air discharging roller is disposed below said cutter; and

said tachometer device is fixedly disposed below said air discharging roller.

4. The 3-D strip winding system of claim 3, wherein said tachometer device comprises a tachometer roller, an encoder, a link, a cylinder bracket, a cylinder, a cylinder hinged support, a rail adapter, rails, and slide blocks;

said tachometer roller is installed at the front end of said link;

said encoder is fixed at the side of said tachometer roller;

said cylinder bracket is connected to said link;

said output end of said cylinder is hinged with said cylinder bracket;

said input end of said cylinder is flexibly connected to said hinged support;

said rails are placed rigidly below said rail adapter; and

said slide blocks are disposed at the predetermined position of said rails and fastened to said link.

5. The 3-D strip winding system of claim 1, wherein

said bracket comprises a group of telescopic rods, a group of servo drive rollers for strip transportation, and a group of follow-up guide rollers;

said group of said servo drive rollers for strip transportation and said group of said follow-up guide rollers are installed on said telescopic rod;

the front end of said bracket is connected to said support and the back end is connected to said movable base plate.