CN109277910B

CN109277910B - Tire tread polishing equipment and polishing method

Info

Publication number: CN109277910B
Application number: CN201811252934.9A
Authority: CN
Inventors: 施伟; 李金发
Original assignee: Nanjing Pan Mei Lei Te New Material Technology Co ltd
Current assignee: Nanjing Pan Mei Lei Te New Material Technology Co ltd
Priority date: 2018-10-25
Filing date: 2018-10-25
Publication date: 2023-04-21
Anticipated expiration: 2038-10-25
Also published as: CN109277910A

Abstract

The invention discloses tire tread polishing equipment and a polishing method, and belongs to the technical field of tire retreading. The polishing equipment comprises a tensioning device, a driving device and a polishing device; the tensioning device comprises a bracket, wherein a lower extending arm and an upper extending arm which can extend up and down and side extending arms which can extend to two sides respectively are arranged on the bracket; the driving device comprises a driving roller arranged at the upper opening of the box body, and the driving roller is driven by a driving motor arranged in the box body; the polishing device comprises a grinding head and a motor for driving the grinding head to rotate; the lower stretching arm and the upper stretching arm are used for stretching and tensioning the tread; the lower stretching arm is matched with the driving roller up and down to clamp the tread, and the tread is driven to rotate by the rotation of the driving roller; the grinding head extends to the inner side of the tread and clings to the inner wall of the tread. According to the invention, the tread is tightly supported and fixed by the tension device, and all parts of the inner wall of the tread are automatically polished by the tension device, the driving device and the polishing device, so that the operation is simple, the polishing efficiency is high, the quality is good, and the safety is high.

Description

Tire tread polishing equipment and polishing method

Technical Field

The invention relates to the technical field of tire retreading, in particular to tire tread polishing equipment and a polishing method.

Background

Tire retreading is a process in which tires that have worn or otherwise damaged to lose their usable properties are reworked to have usable properties. Retreaded tires are an active way of recycling junked tires, are extension and processing reuse of the tire industry, and in terms of the prospect, junked tire retreading is an industry which is indispensable in the automobile industry as is the tire industry.

Tire retreading is classified into various cases, and conventionally, the process of applying tread to only the tread and re-vulcanizing is called tire retreading, and depending on the degree of damage of the tire, retreading is performed by adopting a top-turning, shoulder-turning or full-turning process, respectively. The tire retreading comprises the steps of polishing, gluing, assembling, fluidizing and the like, in the polishing step, the outer wall of the tire and the inner wall of the new tread are required to be polished respectively, equipment for polishing the outer wall of the tire in the existing equipment is common, and the inner wall of the new tread is usually polished by adopting a manual polishing mode, when the tire retreading is polished, a polisher or a grinder is required to be taken for operation, so that the safety is poor, the labor intensity is high, the efficiency is low, and the labor cost is high.

Chinese patent, bulletin number: CN 106626455A, application publication date: the utility model discloses a model polisher of annular tread inner wall, the on-line screen storage device comprises a base, two gyro wheels have been supported through two supports on the base, wherein one gyro wheel is driven its rotation by first motor or first air motor, it has annular rotary drum to support on two gyro wheels, the upper arm of the L type support of fixing on the base stretches into in the annular rotary drum and is fixed with the bracket, slide on the horizontal slide rail of bracket is provided with the slider, the cover is equipped with the sleeve on the vertical axis of fixing on the slider, be fixed with mounting panel and cantilever on the sleeve, the outer end pivoted of cantilever is provided with the cross axle, the grinding wheel is installed to the one end of cross axle, install second motor or second air motor on the mounting panel, second motor or second air motor drive the cross axle through transmission and rotate. When the invention is applied, the whole polishing surface forms a proper radian through the rotation of the cantilever, the labor intensity is low, the production efficiency is high, the polishing quality is good, the damage to human body is small, and the invention is suitable for automatically polishing the inner wall of the annular tread. However, when the invention is applied, the annular tread cannot be effectively fixed, is easy to collapse and deform, and seriously affects the polishing efficiency and the safety.

Disclosure of Invention

Technical problem to be solved by the invention

Aiming at the problems that annular tread inner wall polishing equipment in the prior art cannot effectively fix annular tread and seriously affect polishing efficiency and safety, the invention provides tire tread polishing equipment and a polishing method.

Technical proposal

In order to solve the problems, the technical scheme provided by the invention is as follows:

a tire tread polishing device comprises a tensioning device, a driving device and a polishing device;

the tensioning device comprises a bracket, wherein a lower extending arm and an upper extending arm which can extend up and down are arranged on the bracket;

the driving device comprises a driving roller arranged at the upper opening of the box body, and the driving roller is driven by a driving motor arranged in the box body;

the polishing device comprises a polishing head and a motor for driving the polishing head to rotate;

the lower stretching arms and the upper stretching arms are used for stretching and tensioning the tread; the lower stretching arm is matched with the driving roller up and down to clamp the tread, and the tread is driven to rotate by the rotation of the driving roller; the grinding head extends to the inner side of the tread and clings to the inner wall of the tread.

Further, the method comprises, among other things,

the bracket comprises a base, a top plate and a plurality of guide rods; the guide rods are vertically fixed on the base and are symmetrically arranged left and right; the top plate is fixed at the top of the guide rod;

the lower stretching arm comprises a hydraulic cylinder I, a lifting plate I, an upright post and a roller arm I; the hydraulic cylinder I is vertically arranged, the lower end of the hydraulic cylinder I is fixedly connected with the base, and the upper end of the hydraulic cylinder I is fixed at the bottom of the lifting plate I; the lifting plate I is movably matched with the guide rod and can slide up and down along the guide rod; the stand is vertically fixed on the lifting plate I, the rear end of the roller arm I is fixed at the upper end of the stand, and the front end of the roller arm I horizontally extends towards the front side.

Further, the tensioning device comprises two lower stretching arms, and the two lower stretching arms are symmetrically arranged left and right.

Further, the upper stretching arm comprises a lifting plate II, a roller arm II and two hydraulic cylinders II which are symmetrically arranged left and right; the hydraulic cylinders II are vertically arranged, the lower ends of the hydraulic cylinders II are fixedly connected with the base, and the upper ends of the hydraulic cylinders II are fixed at the bottom of the lifting plate II; the lifting plate II is movably matched with the guide rod and can slide up and down along the guide rod; the rear end of the roller arm II is fixed on the lifting plate II, and the front end of the roller arm II horizontally extends towards the front side.

Further, the tensioning device further comprises side stretching arms which are symmetrically arranged left and right, and the side stretching arms can stretch to two sides respectively.

Further, the side stretching arm comprises a first movable arm, and the first movable arm comprises a connecting block, a movable rod I, a hydraulic cylinder III and a roller arm III; the connecting block is fixed at the top of the top plate, one end of the movable rod I is hinged with the connecting block, and the other end of the movable rod I is a free end; the free end of the movable rod I is fixedly provided with a hinge block I, one end of the hydraulic cylinder III is hinged with the connecting block, and the other end of the hydraulic cylinder III is hinged with the hinge block I; the rear end of the roller arm III is fixedly connected with the free end of the movable rod I, and the front end of the roller arm III horizontally extends towards the front side.

Further, the side stretching arm also comprises a second movable arm, and the second movable arm comprises a movable rod II, a hydraulic cylinder IV and a roller arm IV; one end of the movable rod II is hinged with a hinge block II arranged on the free end of the movable rod I, and the other end of the movable rod II is a free end; one end of the hydraulic cylinder IV is hinged with a hinge block III arranged in the middle of the movable rod I, and the other end of the hydraulic cylinder IV is hinged with a hinge block IV arranged in the middle of the movable rod II; the rear end of the roller arm IV is fixedly connected with the free end of the movable rod II, and the front end of the roller arm IV horizontally extends towards the front side.

Further, the first movable arm and the second movable arm extend and retract synchronously or asynchronously.

Further, the polishing device also comprises a supporting seat and a hydraulic cylinder V; the hydraulic cylinder V is horizontally and longitudinally arranged, the supporting seat is fixed on the cylinder body of the hydraulic cylinder V, and the motor is fixed on the supporting seat; the end part of a piston rod of the hydraulic cylinder V is fixedly connected with a cross rod on the base, and a roller is fixed at the bottom of a cylinder body of the hydraulic cylinder V.

A polishing method of tire tread comprises the following steps:

step one, fixing a tread:

A. hanging the tread to be polished on a tensioning device;

B. controlling the lower stretching arms at two sides to move so as to drive the roller arms I at two sides to move downwards, and clamping the tread between the roller arms I and a driving roller on a driving device;

C. then, the upper stretching arms and the side stretching arms on the two sides are controlled to move, and the roller arms II, III and IV are respectively driven to expand outwards from the initial positions, so that the tread is tightly supported;

step two, controlling a hydraulic cylinder V in the polishing device to start, and pushing the polishing device to move forwards from a starting position, so that a grinding head in the polishing device extends to the inner ring of the tread and is clung to the inner wall of the tread;

step three, polishing:

A. controlling a motor in the polishing device to start so as to drive the grinding head to polish the inner wall of the tread;

B. meanwhile, the driving device is controlled to start, and the driving roller on the driving device drives the tread to rotate so as to polish all parts of the inner wall of the tread;

step four, removing the tread after polishing:

A. controlling a hydraulic cylinder V in the polishing device to start to drive the polishing device to move to the rear side and retract to the starting position;

B. the upper stretching arms and the side stretching arms on two sides are controlled to move to drive the roller arms II, III and IV to shrink inwards to retract to the initial position;

C. controlling the lower stretching arms at two sides to move to drive the roller arms I at two sides to move upwards and retract to the initial position;

D. and taking the polished tread off from the tensioning device to finish polishing.

Advantageous effects

Compared with the prior art, the technical scheme provided by the invention has the following beneficial effects:

(1) According to the tire tread polishing equipment provided by the invention, the tread is tightly supported and fixed by the tensioning device, so that the tread deformation in the polishing process is avoided; the lower stretching arm in the tensioning device is matched with the driving roller in the driving device to clamp the tread, the tread is driven to rotate, and the polishing device matched with the tensioning device and the driving device is used for automatically polishing all parts of the inner wall of the tread, so that the polishing efficiency is high, the polishing of all parts of the inner wall of the tread is uniform, the polishing quality is good, and the safety is high;

(2) According to the tire tread polishing equipment provided by the invention, the lower stretching arm, the upper stretching arm and the side stretching arms are all driven by hydraulic pressure, so that the speed is adjustable, and the stability is good;

(3) According to the tire tread polishing equipment provided by the invention, the lifting plate I in the lower extending arm and the lifting plate II of the upper extending arm are respectively in sliding fit with the guide rod in the bracket, and the movement is more stable and the safety is high due to the guide of the guide rod;

(4) The tire tread polishing equipment provided by the invention comprises two lower stretching arms which are symmetrically arranged left and right, wherein a polishing processing area is left between the two lower stretching arms, so that the polishing device is convenient to mount and polish the inner wall of the tire tread;

(5) The tire tread polishing equipment provided by the invention has the advantages that the tension device also comprises the side stretching arms which are symmetrically arranged left and right, so that the stretching range of the tension device is larger, and the tension device is further suitable for polishing a tread with a larger size;

(6) The tire tread polishing equipment provided by the invention has the advantages that the side stretching arms comprise the first movable arms and the second movable arms, the stretching range is larger, and the applicable tread size is further increased;

(7) According to the tire tread polishing equipment provided by the invention, the first movable arm and the second movable arm synchronously extend and retract, so that the action time is short, and the processing efficiency is high;

(8) According to the tire tread polishing equipment provided by the invention, the first movable arm and the second movable arm are asynchronously stretched and retracted, and only the first movable arm acts when polishing the medium-size tire tread, so that the power consumption is low, and the production cost is reduced;

(9) The tire tread polishing device comprises the motor, the grinding head, the supporting seat and the hydraulic cylinder V, and the supporting seat, the motor and the grinding head are driven to move back and forth by the hydraulic cylinder V, so that the automatic contact and separation of the grinding head and the tire tread are realized, the polishing processing efficiency is improved, manual intervention is not needed, and the safety is high;

(10) According to the polishing method for the tire tread, provided by the invention, the inner wall of the tread is polished by using polishing equipment, the operation is simple, the polishing efficiency is high, the polishing quality is good, the labor cost is low, and the polishing process is safe and reliable;

(11) The polishing method for the tire tread provided by the invention can polish the tire treads with different sizes, has a wide application range, and has higher efficiency, saves more energy and greatly reduces the processing cost when polishing the tire tread with smaller size.

Drawings

FIG. 1 is a schematic view of the construction of the sanding apparatus of the present invention;

FIG. 2 is a schematic structural view of a bracket according to the present invention;

FIG. 3 is a schematic view of the upper and lower arms of the present invention mated with a bracket;

FIG. 4 is a schematic view of the structure of the lower arm of the present invention;

FIG. 5 is a schematic view of the structure of the side extension arm of the present invention;

FIG. 6 is a schematic view of the rear side structure of the sanding apparatus of the present invention;

fig. 7 is a schematic structural view of a polishing apparatus according to the present invention.

In the accompanying drawings: 100. a polishing device; 110. a support base; 120. a motor; 130. grinding head; 140. a hydraulic cylinder V; 200. a tensioning device; 210. a bracket; 211. a base; 212. a guide rod; 213. a top plate; 214. a cross bar; 220. a lower extension arm; 221. a hydraulic cylinder I; 222. lifting plate I; 223. a column; 224. a roller arm I; 230. an upper extension arm; 231. a hydraulic cylinder II; 232. a lifting plate II; 233. a roller arm II; 240. a side extension arm; 241. a connecting block; 242. a movable rod I; 243. a hydraulic cylinder III; 244. a hinge block I; 245. a cylinder arm III; 246. a hinging block II; 247. a hinge block III; 248. a movable rod II; 249. a hydraulic cylinder IV; 250. a hinging block IV; 251. a roller arm IV; 300. a driving device; 310. a case; 320. and driving the roller.

Detailed Description

For a further understanding of the present invention, the present invention will be described in detail with reference to the drawings and examples.

Example 1

A tire tread buffing apparatus, as shown in fig. 1, 6, 7, includes a tensioning device 200, a driving device 300, and a buffing device 100; the tensioning device 200 comprises a bracket 210, wherein a lower extending arm 220 and an upper extending arm 230 which can extend up and down are arranged on the bracket 210, and the lower extending arm 220 and the upper extending arm 230 are driven by hydraulic pressure; the driving device 300 comprises a driving roller 320 arranged at the upper opening of the box 310, wherein the driving roller 320 is driven by a driving motor arranged in the box 310; the polishing apparatus 100 includes a polishing head 130 and a motor 120 for driving the polishing head 130 to rotate; the lower stretching arm 220 and the upper stretching arm 230 are used for stretching and tightening the tread; the lower stretching arm 220 and the driving roller 320 are matched up and down to clamp the tread, and the driving roller 320 rotates to drive the tread to rotate; the grinding head 130 extends to the inner side of the tread and clings to the inner wall of the tread.

Rollers are arranged at the matching parts of the lower extending arm 220 and the upper extending arm 230 and the tread, and the lower extending arm 220 and the upper extending arm 230 are matched with the tread in a rolling way through the rollers; in this embodiment, the lower stretching arm 220 is provided with two parallel rollers, and the driving roller 320 is three parallel rollers, so as to increase the friction between the lower stretching arm 220 and the driving roller 320, and prevent slipping.

The process steps for polishing the tread are as follows:

step one, hanging the tread on the upper stretching arms 230 of the tensioning device 200, and ensuring that the lower stretching arms 220 and the upper stretching arms 230 are both positioned in the tread annular ring;

step two, then controlling the lower stretching arm 220 to move downwards, and clamping the lower edge of the tread between the roller on the lower stretching arm 220 and the driving roller 320;

step three, simultaneously controlling the upper stretching arms 230 to move upwards to fully stretch and tighten the tread;

step four, starting a motor 120 in the polishing device 100, and driving a grinding head 130 to rotate through the motor 120 to polish the inner wall of the tread;

and fifthly, simultaneously starting a driving motor in the driving device 300, and driving the driving roller 320 to rotate through the driving motor, so that the tread is driven to rotate along with the driving roller 320, and each part of the inner wall of the tread is polished.

According to the tire tread polishing equipment, the tire tread is stretched and tensioned by means of the tensioning device 200, so that the tire tread is prevented from deforming in the polishing process, and the polishing efficiency, polishing quality and safety are improved; the lower stretching arm 220 in the tensioning device 200 is matched with the driving roller 320 in the driving device 300 to clamp the tread, the tread is driven to rotate, the polishing device 100 matched with the tensioning device 200 and the driving device 300 is utilized to polish all parts of the inner wall of the tread automatically, the polishing efficiency is further improved, polishing of all parts of the inner wall of the tread is uniform and consistent, and the polishing quality is good.

Example 2

The tire tread polishing apparatus of this embodiment is basically the same as that of embodiment 1, except that, as shown in fig. 2, the bracket 210 includes a base 211, a top plate 213 and a plurality of guide rods 212; the guide rods 212 are vertically fixed on the base 211 and are symmetrically arranged left and right; the top plate 213 is fixed to the top of the guide bar 212.

The base 211 and the top plate 213 are used to fix the guide rods 212, and the guide rods 212 are used to guide the movement of the lower and upper stretching

arms

220 and 230, and improve the movement stability of the lower and upper stretching

arms

220 and 230; in this embodiment, as shown in fig. 2, four guide rods 212 are provided, and the guide rods 212 are symmetrically arranged in rectangular four corners, so that the stability of the guide rods 212 is good.

As shown in fig. 3 and 4, the lower stretching arm 220 includes a hydraulic cylinder i 221, a lifting plate i 222, a column 223, and a drum arm i 224; the hydraulic cylinder I221 is vertically arranged, the lower end of the hydraulic cylinder I221 is fixedly connected with the base 211, and the upper end of the hydraulic cylinder I is fixed at the bottom of the lifting plate I222; the lifting plate I222 is movably matched with the guide rod 212 and can slide up and down along the guide rod 212; the upright post 223 is vertically fixed on the lifting plate I222, the rear end of the roller arm I224 is fixed at the upper end of the upright post 223, and the front end horizontally extends towards the front side.

The hydraulic cylinder I221 is used for driving the lower stretching arm 220 to move up and down; the lifting plate I222 is used for connecting the lower extending arm 220 and the guide rod 212, so that the lower extending arm 220 moves axially along the guide rod 212; the upright 223 is used for supporting the roller arm I224 to keep the roller arm I at a proper height; the roller arm I224 is used for spreading the tread, a roller is arranged in the roller arm I224, and the driving roller 320 and the roller in the roller arm I224 are matched up and down to clamp the lower edge of the tread, so that the driving roller 320 drives the tread to rotate.

In the tire tread polishing device of the embodiment, the lower stretching arm 220 is driven by the hydraulic cylinder I221, so that the movement is stable, and the speed is adjustable; the lifting plate I222 in the lower extending arm 220 is in sliding fit with the guide rod 212 in the bracket 210, so that the lower extending arm 220 moves stably and has high safety.

Example 3

The tire tread polishing apparatus of this embodiment has a basic structure similar to that of embodiment 1 or 2, and is different from and improved in that, as shown in fig. 3, the tensioning device 200 includes two lower stretching arms 220, and the two lower stretching arms 220 are symmetrically disposed about each other, so that a polishing area is left between the two lower stretching arms 220, and the polishing device 100 is convenient for polishing the inner wall of the tread.

When the tread is ground, the two lower stretching arms 220 can move simultaneously or sequentially, and the action modes are flexible and changeable; in this embodiment, the two lower stretching arms 220 move up and down at the same time, so that the processing time is saved and the processing efficiency is improved.

Example 4

The tire tread polishing apparatus of this embodiment is similar to embodiment 2 or 3 in basic structure, and is different from and improved in that, as shown in fig. 3, the upper extension arm 230 includes a lifting plate ii 232, a roller arm ii 233, and two hydraulic cylinders ii 231 symmetrically disposed in left-right direction; the hydraulic cylinders II 231 are vertically arranged, the lower ends of the hydraulic cylinders II are fixedly connected with the base 211, and the upper ends of the hydraulic cylinders II are fixed at the bottom of the lifting plate II 232; the lifting plate II 232 is movably matched with the guide rod 212 and can slide up and down along the guide rod 212; the rear end of the roller arm II 233 is fixed on the lifting plate II 232, and the front end extends horizontally to the front side.

The hydraulic cylinders II 231 are used for driving the upper extension arm 230 to move up and down, and two hydraulic cylinders II 231 are symmetrically arranged left and right, so that the stability of the upper extension arm 230 is good when the upper extension arm moves up and down; the lifting plate II 232 is used for connecting the upper extending arm 230 and the guide rod 212, so that the upper extending arm 230 moves axially along the guide rod 212, and the stability is further improved; meanwhile, the lifting plate II 232 is also used for installing and supporting the roller arm II 233; the roller arm II 233 is used for stretching the tread, and a roller is arranged in the roller arm II 233 and is matched with the tread in a rolling way so as to reduce the rotation resistance of the tread.

During polishing, the two hydraulic cylinders II 231 move synchronously, so that the upper extending arm 230 is prevented from being damaged due to asynchronous lifting.

In this embodiment, as shown in fig. 3, two roller arms ii 233 are fixed on the lifting plate ii 232, and the two roller arms ii 233 are symmetrically disposed about each other, so as to increase the extension range of the tensioning device 200, so that the tensioning device is suitable for tread polishing with a larger size.

Example 5

The tire tread buffing apparatus according to this embodiment is similar to any of embodiments 1 to 4 in basic structure, and is different from and improved in that, as shown in fig. 1, the tensioning device 200 further includes side extension arms 240 symmetrically disposed on the left and right, and the side extension arms 240 may extend to two sides respectively, so that the extension range of the tensioning device 200 is larger, and the tensioning device is suitable for tread buffing with a larger size.

The side stretching arms 240 are driven by hydraulic pressure, and the side stretching arms 240 on two sides can stretch and retract synchronously and can move independently in sequence, so that the flexibility of stretching modes is further improved; in this embodiment, the side stretching arms 240 on both sides stretch synchronously, so that the processing time is further saved and the processing efficiency is improved.

The side stretching arms 240 and the upper stretching arms 230 can synchronously act, or can independently act in sequence, and the action modes are flexible and changeable; in this embodiment, the side stretching arms 240 and the upper stretching arms 230 operate synchronously, so that the operating time is further shortened and the processing efficiency is improved.

The matching parts of the side stretching arms 240 and the tread are provided with rollers, and the side stretching arms 240 and the tread are matched in a rolling way through the rollers so as to reduce the rotation resistance of the tread.

Example 6

The tire tread polishing apparatus of this embodiment is basically the same as that of embodiment 5, except that, as shown in fig. 5, the side stretching arm 240 includes a first movable arm including a connection block 241, a movable rod i 242, a hydraulic cylinder iii 243 and a cylinder arm iii 245; the connecting block 241 is fixed on the top of the top plate 213, one end of the movable rod I242 is hinged with the connecting block 241, and the other end is a free end; a hinge block I244 is fixed on the free end of the movable rod I242, one end of the hydraulic cylinder III 243 is hinged with the connecting block 241, and the other end is hinged with the hinge block I244; the rear end of the roller arm III 245 is fixedly connected with the free end of the movable rod I242, and the front end extends horizontally towards the front side.

The connection block 241 is used to connect the side extension arm 240 to the top plate 213; the movable rod I242 is used as an extending arm which extends outwards; the hydraulic cylinder III 243 is used for driving the movable rod I242 to swing up and down around the connecting block 241; the roller arm III 245 is used for stretching the tread, and a roller is arranged in the roller arm III 245 and is in rolling fit with the tread so as to reduce the rotation resistance of the tread.

According to the tire tread polishing equipment, the side stretching arm 240 comprises the first movable arm, the first movable arm comprises the connecting block 241, the movable rod I242, the hydraulic cylinder III 243 and the roller arm III 245 which are matched with each other, the movable rod I242 is driven to swing through the hydraulic cylinder III 243, so that stretching action of the side stretching arm 240 is achieved, the action is smooth, the speed is controllable, the structure is simple, and the cost is low.

Example 7

The tire tread polishing apparatus of this embodiment is similar to embodiment 6 in basic structure, and is different from and improved in that, as shown in fig. 5, the side stretching arm 240 further includes a second movable arm, and the second movable arm includes a movable rod ii 248, a hydraulic cylinder iv 249 and a roller arm iv 251; one end of the movable rod II 248 is hinged with a hinge block II 246 arranged on the free end of the movable rod I242, and the other end is a free end; one end of the hydraulic cylinder IV 249 is hinged with a hinge block III 247 arranged in the middle of the movable rod I242, and the other end of the hydraulic cylinder IV 249 is hinged with a hinge block IV 250 arranged in the middle of the movable rod II 248; the rear end of the roller arm IV 251 is fixedly connected with the free end of the movable rod II 248, and the front end extends horizontally to the front side.

The movable lever ii 248 serves as a second extension arm extending outward to further expand the extension range of the side extension arm 240 to further increase the tread size applicable thereto; the hydraulic cylinder IV 249 is used for driving the movable rod II 248 to swing left and right around the free end of the movable rod I242; the roller arm IV 251 is used for stretching the tread, and rollers are arranged in the roller arm IV 251 and are in rolling fit with the tread to reduce the rotation resistance of the tread.

In this embodiment, the first movable arm and the second movable arm extend and retract synchronously, and the action time is short.

In the tire tread buffing apparatus of the present embodiment, the side stretching arms 240 include the first movable arm and the second movable arm, the stretching range is larger, and the applicable tread size is further increased; the first movable arm and the second movable arm synchronously extend and retract, so that the action time is short, and the processing efficiency is high.

Example 8

The tire tread polishing apparatus of this embodiment is the same as embodiment 7 in basic structure, different from and improved in that the first movable arm and the second movable arm are asynchronously extended and retracted, and independently operated, respectively; for a medium-sized tread, the tread can be fully stretched and expanded by only using the first movable arm of the side stretching arm 240 in cooperation with the lower stretching arm 220 and the upper stretching arm 230, and the second movable arm is not required, in which case the first movable arm acts alone, thereby reducing power consumption and thus reducing production cost.

Example 9

The tire tread polishing apparatus of this embodiment is basically the same as any one of embodiments 1 to 8, except that, as shown in fig. 6 and 7, the polishing device 100 further includes a support base 110 and a hydraulic cylinder v 140; the hydraulic cylinder V140 is horizontally and longitudinally arranged, the supporting seat 110 is fixed on the cylinder body of the hydraulic cylinder V140, and the motor 120 is fixed on the supporting seat 110; the end of the piston rod of the hydraulic cylinder V140 is fixedly connected with the cross rod 214 on the base 211, and a roller is fixed at the bottom of the cylinder body of the hydraulic cylinder V140.

The supporting seat 110 is used for supporting the motor 120 to keep the motor at a certain height so as to be effectively matched with the tensioning device 200 and the driving device 300; the hydraulic cylinder V140 is matched with a roller fixed at the bottom of the cylinder body of the hydraulic cylinder V140 and used for dragging the supporting seat 110, the motor 120 and the grinding head 130 to move back and forth.

In this embodiment, as shown in fig. 7, two hydraulic cylinders v 140 are symmetrically disposed at the bottom of the supporting seat 110, so that stability is good.

According to the tire tread polishing device, the polishing device 100 comprises the motor 120, the polishing head 130, the supporting seat 110 and the hydraulic cylinder V140, and the hydraulic cylinder V140 drives the supporting seat 110, the motor 120 and the polishing head 130 to move back and forth, so that the polishing head 130 is automatically contacted with and separated from a tire tread, polishing efficiency is improved, manual intervention is not needed, and safety is high.

Example 10

The tire tread polishing apparatus of this embodiment has the same basic structure as any one of embodiments 1 to 9, and is different and improved in that the tensioning device 200, the driving device 300 and the polishing device 100 are controlled centrally by a control cabinet, so that the cost of labor is low and the safety is high.

Example 11

A method of buffing a tire tread using the buffing apparatus of any one of embodiments 2 to 10, comprising the steps of:

step one, fixing a tread:

A. the tread to be buffed is hung on the tensioning device 200, supported by the upper extension arm 230 and the side extension arm 240 on the tensioning device 200, and the upper extension arm 230 and the lower extension arm 220 are ensured to be positioned in the tread annular ring;

B. controlling the lower stretching arms 220 at two sides to move so as to drive the roller arms I224 at two sides to move downwards, and clamping the tread between the roller arms I224 and the driving roller 320 on the driving device 300;

C. then, the upper stretching arm 230 and the side stretching arms 240 on the two sides are controlled to move, and the roller arms II 233, III 245 and IV 251 are respectively driven to expand outwards from the initial positions, so that the tread is tightly supported;

step two, controlling a hydraulic cylinder V140 in the polishing device 100 to start, and pushing the polishing device 100 to move from a starting position to the front side, so that a grinding head 130 in the polishing device 100 extends to the inner ring of the tread and is clung to the inner wall of the tread;

step three, polishing:

A. controlling a motor 120 in the polishing device 100 to start so as to drive a grinding head 130 to polish the inner wall of the tread;

B. meanwhile, the driving device 300 is controlled to start, and the driving roller 320 on the driving device 300 drives the tread to rotate so as to polish all parts of the inner wall of the tread;

step four, removing the tread after polishing:

A. the hydraulic cylinder V140 in the polishing device 100 is controlled to be started to drive the polishing device 100 to move to the rear side and retract to the starting position;

B. the upper extension arm 230 and the side extension arms 240 on the two sides are controlled to move to drive the roller arm II 233, the roller arm III 245 and the roller arm IV 251 to retract inwards to retract to the initial position;

C. controlling the lower stretching arms 220 at two sides to move to drive the roller arms I224 at two sides to move upwards and retract to the initial position;

D. and taking the polished tread off the tensioning device 200 to finish polishing.

According to the polishing method for the tire tread, the polishing equipment is utilized to polish the inner wall of the tread, the operation is simple, the polishing efficiency is high, the polishing quality is good, the labor cost is low, and the polishing process is safe and reliable.

Example 12

A method of buffing a tire tread by buffing a smaller tire tread using the buffing apparatus described in any one of examples 1 to 10, the basic steps being the same as example 11, except that the tread fixing step is:

A. the tread to be ground is hung on the tensioning device 200, supported by the upper extending arm 230 on the tensioning device 200, and the upper extending arm 230 and the lower extending arm 220 are ensured to be positioned in the tread annular ring;

C. then the upper stretching arm 230 is controlled to move to drive the roller arm II 233 to expand outwards from the initial position, so as to tighten the tread.

According to the polishing method for the tire tread, when the tire tread with a smaller size is polished, the efficiency is higher, the energy is saved, and the processing cost is greatly reduced.

The invention and its embodiments have been described above by way of illustration and not limitation, and the invention is illustrated in the accompanying drawings and described in the drawings in which the actual structure is not limited thereto. Therefore, if one of ordinary skill in the art is informed by this disclosure, the structural mode and the embodiments similar to the technical scheme are not creatively designed without departing from the gist of the present invention.

Claims

1. A tire tread buffing apparatus, characterized in that: comprises a tensioning device (200), a driving device (300) and a polishing device (100);

the tensioning device (200) comprises a bracket (210), wherein a lower stretching arm (220) and an upper stretching arm (230) which can stretch up and down are arranged on the bracket (210);

the driving device (300) comprises a driving roller (320) arranged at the upper opening of the box body (310), and the driving roller (320) is driven by a driving motor arranged in the box body (310);

the polishing device (100) comprises a polishing head (130) and a motor (120) for driving the polishing head (130) to rotate;

the lower stretching arm (220) and the upper stretching arm (230) are used for stretching and tensioning the tread; the lower stretching arm (220) is matched with the driving roller (320) up and down to clamp the tread, and the driving roller (320) rotates to drive the tread to rotate; the grinding head (130) extends to the inner side of the tread and is clung to the inner wall of the tread;

wherein, the liquid crystal display device comprises a liquid crystal display device,

the bracket (210) comprises a base (211), a top plate (213) and a plurality of guide rods (212); the guide rods (212) are vertically fixed on the base (211), and the guide rods (212) are symmetrically arranged left and right; the top plate (213) is fixed at the top of the guide rod (212);

the lower stretching arm (220) comprises a hydraulic cylinder I (221), a lifting plate I (222), a stand column (223) and a roller arm I (224); the hydraulic cylinder I (221) is vertically arranged, the lower end of the hydraulic cylinder I (221) is fixedly connected with the base (211), and the upper end of the hydraulic cylinder I (221) is fixed at the bottom of the lifting plate I (222); the lifting plate I (222) is movably matched with the guide rod (212), and the lifting plate I (222) can slide up and down along the guide rod (212); the upright post (223) is vertically fixed on the lifting plate I (222), the rear end of the roller arm I (224) is fixed at the upper end of the upright post (223), and the front end of the roller arm I (224) horizontally extends towards the front side;

the tensioning device (200) comprises two lower stretching arms (220), and the two lower stretching arms (220) are symmetrically arranged left and right; the upper stretching arm (230) comprises a lifting plate II (232), a roller arm II (233) and two hydraulic cylinders II (231) which are symmetrically arranged left and right; the hydraulic cylinders II (231) are vertically arranged, the lower ends of the hydraulic cylinders II (231) are fixedly connected with the base (211), and the upper ends of the hydraulic cylinders II (231) are fixed at the bottom of the lifting plate II (232); the lifting plate II (232) is movably matched with the guide rod (212), and the lifting plate II (232) can slide up and down along the guide rod (212); the rear end of the roller arm II (233) is fixed on the lifting plate II (232), and the front end of the roller arm II (233) horizontally extends to the front side; the tensioning device (200) further comprises side stretching arms (240) which are symmetrically arranged left and right, and the side stretching arms (240) can stretch to two sides respectively; the side stretching arm (240) comprises a first movable arm, wherein the first movable arm comprises a connecting block (241), a movable rod I (242), a hydraulic cylinder III (243) and a roller arm III (245); the connecting block (241) is fixed at the top of the top plate (213), one end of the movable rod I (242) is hinged with the connecting block (241), and the other end of the movable rod I (242) is a free end; a hinge block I (244) is fixed on the free end of the movable rod I (242), one end of the hydraulic cylinder III (243) is hinged with the connecting block (241), and the other end of the hydraulic cylinder III (243) is hinged with the hinge block I (244); the rear end of the roller arm III (245) is fixedly connected with the free end of the movable rod I (242), and the front end of the roller arm III (245) horizontally extends towards the front side.

2. A tire tread buffing apparatus according to claim 1 wherein: the side stretching arm (240) further comprises a second movable arm, and the second movable arm comprises a movable rod II (248), a hydraulic cylinder IV (249) and a roller arm IV (251); one end of the movable rod II (248) is hinged with a hinge block II (246) arranged on the free end of the movable rod I (242), and the other end of the movable rod II (248) is a free end; one end of the hydraulic cylinder IV (249) is hinged with a hinged block III (247) arranged in the middle of the movable rod I (242), and the other end of the hydraulic cylinder IV (249) is hinged with a hinged block IV (250) arranged in the middle of the movable rod II (248); the rear end of the roller arm IV (251) is fixedly connected with the free end of the movable rod II (248), and the front end of the roller arm IV (251) horizontally extends towards the front side.

3. A tire tread buffing apparatus according to claim 2 wherein: the first movable arm and the second movable arm extend and retract synchronously or asynchronously.

4. A tire tread buffing apparatus according to claim 3 wherein: the polishing device (100) further comprises a supporting seat (110) and a hydraulic cylinder V (140); the hydraulic cylinder V (140) is horizontally and longitudinally arranged, the supporting seat (110) is fixed on the cylinder body of the hydraulic cylinder V (140), and the motor (120) is fixed on the supporting seat (110); the end part of a piston rod of the hydraulic cylinder V (140) is fixedly connected with a cross rod (214) on the base (211), and a roller is fixed at the bottom of a cylinder body of the hydraulic cylinder V (140).

5. A buffing method using the tire tread buffing apparatus of claim 4, characterized by the steps of:

step one, fixing a tread:

A. hanging the tread to be polished on a tensioning device (200);

B. controlling the lower stretching arms (220) at two sides to move so as to drive the roller arms I (224) at two sides to move downwards, and clamping the tread between the roller arms I (224) and the driving roller (320) on the driving device (300);

C. then the upper stretching arm (230) and the side stretching arms (240) at the two sides are controlled to move, and the roller arm II (233), the roller arm III (245) and the roller arm IV (251) are respectively driven to expand outwards from the initial positions, so that the tread is tightly supported;

step two, controlling a hydraulic cylinder V (140) in the polishing device (100) to start to push the polishing device (100) to move from a starting position to the front side, so that a grinding head (130) in the polishing device (100) extends to the inner ring of the tread and is clung to the inner wall of the tread;

step three, polishing:

A. controlling a motor (120) in the polishing device (100) to start so as to drive a grinding head (130) to polish the inner wall of the tread;

B. meanwhile, the driving device (300) is controlled to start, and the driving roller (320) on the driving device (300) drives the tread to rotate so as to polish all parts of the inner wall of the tread;

step four, removing the tread after polishing:

A. the hydraulic cylinder V (140) in the polishing device (100) is controlled to be started to drive the polishing device (100) to move to the rear side and retract to the starting position;

B. the upper extension arm (230) and the side extension arms (240) at the two sides are controlled to move to drive the roller arm II (233), the roller arm III (245) and the roller arm IV (251) to retract inwards to retract to the initial position;

C. controlling the lower stretching arms (220) at two sides to move to drive the roller arms I (224) at two sides to move upwards and retract to the initial position;

D. and taking the polished tread off the tensioning device (200) to finish polishing.