Tire edging device and method of use thereof

Abstract

The application relates to the technical field of tire production equipment, in particular to a tire trimming device and a using method thereof. The tire trimming device comprises a portal frame, the portal frame comprises a first side wall, a second side wall and a cross beam, the first side wall is provided with a motor, the output end of the motor is connected with a rotating shaft, a radial expansion mechanism is arranged on the rotating shaft, the radial expansion mechanism comprises a plurality of radial telescopic pieces which are equidistantly arranged around the circumference of the rotating shaft and a telescopic control connected with the radial telescopic pieces, the free end of the radial telescopic piece is connected with an arc-shaped block, the radial telescopic piece can push the arc-shaped block to tightly adhere to the circumferential inner wall of the tire, a crown shoulder scraper is arranged below the radial expansion mechanism, and a lip scraper is arranged on each of the axial two sides. The tire is supported and fixed from the inside of the tire, the limitation of the traditional fixing mode on the trimming area is eliminated, the crown, the shoulder and the lip of the tire can be trimmed at the same time, and the working efficiency is greatly improved.

Description

Technical Field

[0001] This invention relates to the field of tire production equipment technology, and in particular to a tire trimming device and its usage method. Background Technology

[0002] During tire production, vulcanization is carried out in a mold. The mold contains venting holes, resulting in burrs on the tread, shoulder, and bead of the vulcanized tire. These burrs on the tread and shoulder not only affect the appearance but also increase the friction between the tire and the road surface, increasing rolling resistance and fuel consumption. Burrs on the bead can affect the airtightness when the tire is connected to the rim. Therefore, the tire needs to be trimmed to remove these burrs.

[0003] Patent application number CN202110744556.1 discloses a tire manufacturing burr removal device, including a tire fixing mechanism, a burr removal mechanism, and a burr collection mechanism. The device can fix the tire, remove tire burrs, ensure smooth burr feeding, and collect burrs. The tire fixing mechanism is connected to the burr collection mechanism, and the burr removal mechanism is connected to the burr collection mechanism. However, the drawback of the above technical solution is that it can only remove burrs near the tire shoulder on the tire sidewall and cannot remove burrs from the tire crown and tire bead.

[0004] Patent application CN202111013932.6 discloses a tire trimming device and method for improving trimming effect, including a trimming component, a retreading component, a transport component, a detection component, an outlet seat, and a controller. The outlet seat and the retreading component are respectively placed vertically on both sides of the transport component, and the trimming component is horizontally movable inside the transport component. A detection component is provided on the side of the trimming component. This invention can realize fully automated tire trimming operation, further improving trimming quality and efficiency. During the tire rotation and transport process, the angle sensor value changes, and the speed of the sliding seat is adjusted in real time to achieve the following trimming of the tire by the blade component. However, the above technical solution has the drawback that it can only remove the burrs at the tire crown, and cannot remove the burrs at the tire shoulder and tire bead.

[0005] In summary, in order to improve trimming efficiency, there is an urgent need for a device that can trim the tire crown, shoulder, and bead simultaneously. Summary of the Invention

[0006] To solve at least one of the above-mentioned technical problems, the present invention provides a tire trimming device, including a gantry frame, the gantry frame including a first sidewall, a second sidewall and a crossbeam, the first sidewall being provided with a motor, the output end of the motor being connected to a rotating shaft, the rotating shaft being provided with a radial expansion mechanism, the radial expansion mechanism including a plurality of radial telescopic members equidistantly arranged around the circumference of the rotating shaft and telescopic control connected thereto, the free end of the radial telescopic members being connected to an arc-shaped block, the radial telescopic members being able to push the arc-shaped block to tightly fit the circumferential inner wall of the tire, a tire crown and shoulder scraper being provided below the radial expansion mechanism, and tire bead scrapers being provided on both axial sides respectively.

[0007] Preferably, the radial telescopic component includes a sealed and slidably fitted inner cylinder and an outer cylinder. The inner cylinder is open at both ends and fixed to the rotating shaft. The free end of the outer cylinder is sealed and fixed to the inner wall of the arc-shaped block. The outer wall of the arc-shaped block is provided with an anti-slip layer. The telescopic control is connected to the air source and the inner cylinder respectively.

[0008] Preferably, two cylinders parallel to the rotating shaft are equidistantly arranged on the outer cylinder. The piston rod of the cylinder is connected to the pressure block. A ring is fixed on the outer cylinder. An annular cavity is provided inside the ring. One end of the annular cavity is sealed and connected to the sealed air chamber of the two cylinders. The other end is connected to the telescopic control through a hose. When the piston rod is extended, the pressure block can fit tightly against the inner wall of the tire.

[0009] Preferably, the rotating shaft is axially sealed with a first air passage and a second air passage. The telescopic control includes a fixed ring and a moving ring. The fixed ring is fixed to the first side wall and rotatably sleeved with the rotating shaft. The inner wall of the fixed ring has a first fixed ring cavity that connects the first air passage and the air source, and a second fixed ring cavity that connects the second air passage and the air source. The moving ring is fixedly sleeved on the rotating shaft. A plurality of inner cylinders are equidistantly arranged on the outer wall circumference. The inner wall has a first moving ring cavity that connects the first air passage and the inner cylinder, and a second moving ring cavity that connects the hose and the second air passage.

[0010] Preferably, the gantry frame is provided with a sidewall clamping mechanism, which includes two clamping members symmetrically arranged on both sides of the radial expansion mechanism. Each clamping member includes a rotatably connected connecting ring and a pressure ring. The pressure ring can press and clamp the sidewall of the tire with the clamping block. The connecting ring is provided with a tire bead scraper. One connecting ring is fixedly arranged on the inner side of the first sidewall, and the other connecting ring is connected to a sliding mechanism. The sliding mechanism is arranged on the second sidewall and can control the clamping member to move closer to or away from the radial expansion mechanism.

[0011] Preferably, the sliding mechanism includes a horizontal rod connected to the connecting ring, the horizontal rod connected to a central sliding rod, and a plurality of guide sliding rods equidistantly arranged on the axial circumference of the connecting ring. The central sliding rod and the guide sliding rods can slide through the second side wall. A first spring is sleeved on the central sliding rod and the guide sliding rod, and the first spring is connected to the second side wall. A vertical sliding groove is provided on the second side wall, and a first slider is provided in the vertical sliding groove. The first slider is hinged to a connecting rod, and the other end of the connecting rod is hinged to the horizontal rod. A vertically arranged second spring is connected to the first slider and the vertical sliding groove. A vertical lifting mechanism is provided on the crossbeam, and the vertical lifting mechanism can drive the first slider to slide down and push the clamping member closer to the radial expansion mechanism through the connecting rod.

[0012] Preferably, the gantry frame is provided with a circumferential clamping mechanism, which includes an upper clamping seat and a lower clamping seat located on the upper and lower sides of the radial expansion mechanism. The lower end face of the upper clamping seat and the upper end face of the lower clamping seat are provided with semi-circular placement grooves corresponding to the circumferential outer wall of the tire. A plurality of rolling elements that abut against the circumferential outer wall of the tire are provided equidistantly within the placement grooves. The upper clamping seat is connected to the vertical lifting mechanism.

[0013] Preferably, the vertical lifting mechanism includes a hydraulic cylinder mounted on the crossbeam, the output end of the hydraulic cylinder is connected to a lifting rod, the bottom of the lifting rod is connected to the upper clamping seat and the vertical pressure rod, when the lifting rod is pressed down, the vertical pressure rod can drive the first slider to move down, and the lower clamping seat is provided with a tire crown and tire shoulder scraper.

[0014] Preferably, the lower clamping seat is a hollow structure with a collection mechanism communicating with it at the bottom. The collection mechanism includes a rectangular support frame that can be pulled out and a waste bin. The support frame is fixedly connected to the lower clamping seat, and the top of the waste bin is open and communicates with the lower clamping seat.

[0015] This invention provides a method for using a tire trimming device, comprising the following steps:

[0016] Step S100. Place the tire coaxially on the radial expansion mechanism on the rotating shaft, control the outer cylinder of the radial expansion member to extend radially until the outer wall of the arc block is tightly attached to the circumferential inner wall of the tire, and then control the piston rod of the cylinder to extend axially until the pressure block is tightly attached to the inner wall of the tire, so as to provide contact support for the circumferential inner wall and the two inner walls of the tire, thereby increasing the friction between the tire and the radial expansion mechanism 4.

[0017] Step S200. Adjust the positions of the tread and shoulder scraper and the bead scraper so that the blades of the tread and shoulder scraper are close to the tread and shoulder of the tire, and the blades of the bead scraper are close to the bead of the tire.

[0018] Step S300. Turn on the motor to drive the rotating shaft and radial expansion mechanism to rotate. Under the action of friction between the circumferential inner wall of the tire and the arc-shaped block, as well as between the two inner sidewalls of the tire and the pressure block, the tire rotates synchronously. The tire crown and shoulder scrapers and the tire bead scrapers remove the burrs from the tire crown, shoulder and bead.

[0019] Compared with the prior art, the present invention has the following beneficial technical effects:

[0020] 1. This invention supports and fixes the tire from the inside, eliminating the limitations of traditional fixing methods on the trimming area. It can trim the tire crown, shoulder, and bead simultaneously, greatly improving work efficiency.

[0021] 2. The radial telescopic component includes a sealed and slidably fitted inner cylinder and an outer cylinder. The expansion and contraction of the radial telescopic component is controlled by inflation and deflation. The inner cylinder is fixed on the rotating shaft, and the free end of the outer cylinder is sealed and fixed on the arc-shaped block. The outer wall of the arc-shaped block is provided with an anti-slip layer, which can increase the friction between the tire and the arc-shaped block and improve the rotational stability of the tire.

[0022] 3. A cylinder is provided on the outer cylinder of the radial telescopic component. The piston rod of the cylinder is connected to the pressure block. When the piston rod extends, the pressure block can fit tightly against the inner wall of the tire. Through the double fit and support of the arc-shaped block against the circumferential inner wall of the tire and the two pressure blocks against the inner wall of the tire, the friction between the tire and the radial expansion mechanism is further increased, and the rotational stability of the tire is improved.

[0023] 4. A first air passage and a second air passage are opened inside the rotating shaft. The external air source, the first air passage, the second air passage, the inner cylinder and the cylinder are connected by the telescopic control, so that the overall structure of the equipment is compact.

[0024] 5. The gantry is equipped with a side wall clamping mechanism. The pressure ring on the side wall clamping mechanism can cooperate with the pressure block to squeeze and clamp the side wall of the tire. Through squeezing and clamping, the friction between the tire and the pressure block of the radial expansion mechanism can be greatly increased, thereby greatly improving the rotational stability of the tire.

[0025] 6. The gantry is equipped with a circumferential clamping mechanism. The rolling parts on the circumferential clamping mechanism can cooperate with the arc-shaped block to perform circumferential compression clamping on the tire. Through compression clamping, the friction between the tire and the arc-shaped block of the radial expansion mechanism can be greatly increased, thereby greatly improving the rotational stability of the tire. In addition, the lower clamping seat of the circumferential clamping mechanism can provide support and positioning for the tire.

[0026] 7. The gantry is equipped with a vertical lifting mechanism. The hydraulic cylinder of the vertical lifting mechanism can simultaneously drive the upper clamping seat and the clamping parts connected to the sliding mechanism to move to the target position to squeeze and clamp the tire.

[0027] 8. The lower clamping seat has a hollow structure and a collection mechanism connected to it. The collection mechanism includes a rectangular support frame that can be pulled out and a waste bin. The burrs trimmed by the tire crown, tire shoulder scraper and tire bead scraper can fall directly into the waste bin. When the waste bin is full, it can be emptied simply by pulling it out of the support frame, which is convenient and quick. Attached Figure Description

[0028] Figure 1 This is a schematic diagram of the structure in the trimmed state of the present invention;

[0029] Figure 2 for Figure 1 The right view;

[0030] Figure 3 for Figure 2 AA section view;

[0031] Figure 4 This is a structural schematic diagram of the initial state of the present invention;

[0032] Figure 5 This is another structural schematic diagram of the initial state of the present invention;

[0033] Figure 6 for Figure 5 The right view;

[0034] Figure 7 for Figure 6 BB section view;

[0035] Figure 8 for Figure 7 Cross-sectional view of the central shaft and radial expansion mechanism;

[0036] Figure 9 This is a schematic diagram of the radial expansion mechanism;

[0037] Figure 10 Exploded view of the radial expansion joint, arc block, and pressure block;

[0038] Figure 11 This is a schematic diagram of the circumferential clamping mechanism;

[0039] Figure 12 A schematic diagram of the initial state of the tire crown and shoulder scraper;

[0040] Figure 13 A schematic diagram of the tire crown and shoulder trimming process;

[0041] Explanation of reference numerals in the attached figures:

[0042] 1. Gantry frame; 11. First side wall; 111. First guide groove; 12. Second side wall; 121. Vertical groove; 122. Second guide groove; 13. Crossbeam; 2. Motor; 3. Shaft; 31. First air passage; 311. First through hole; 312. Second through hole; 32. Second air passage; 321. Third through hole; 322. Fourth through hole; 33. Sealing end cap; 4. Radial expansion mechanism; 41. Telescopic control; 411. Fixed ring, 4111, First fixed ring cavity, 4112, Second fixed ring cavity, 4113, First air inlet, 4114, Second air inlet, 412, Moving ring, 4121, First moving ring cavity, 4122, Second moving ring cavity, 4123, First air hole, 4124, Second air hole, 42, Radial telescopic component, 421, Inner cylinder, 422, Outer cylinder, 423, Cylinder, 424, Piston rod, 425, Circular ring, 4251, Annular cavity, 43. Arc-shaped block; 431. Anti-slip layer; 44. Pressure block; 5. Side wall clamping mechanism; 51. Clamping component; 511. Connecting ring; 512. Pressure ring; 52. Sliding mechanism; 521. Horizontal bar; 522. Central slide bar; 523. Guide slide bar; 524. First spring; 525. First slider; 526. Second spring; 527. Connecting rod; 53. Tire bead scraper; 531. First blade holder; 532. First blade; 6. Lifting mechanism 61. Hydraulic cylinder; 62. Lifting rod; 63. Vertical pressure rod; 7. Circumferential clamping mechanism; 71. Upper clamping seat; 72. Lower clamping seat; 73. Placement groove; 74. Rolling element; 75. Tire crown and shoulder scraper; 751. Second blade holder; 752. Second slide groove; 753. Second slider; 754. Second blade; 755. Locking bolt; 76. Buffer pad; 8. Collection mechanism; 81. Support frame; 82. Waste bin; 9. Tire. Detailed Implementation

[0043] The specific embodiments of the present invention are described below with reference to the accompanying drawings and examples:

[0044] It should be noted that the structures, proportions, sizes, etc. shown in the accompanying drawings are only for the purpose of assisting those skilled in the art in understanding and reading the content disclosed in the specification, and are not intended to limit the conditions under which the present invention can be implemented. Any modifications to the structure, changes in the proportions, or adjustments to the size, without affecting the effects and objectives that the present invention can produce, should fall within the scope of the technical content disclosed in the present invention.

[0045] Furthermore, the terms such as "upper," "lower," "left," "right," "middle," and "one" used in this specification are merely for clarity of description and are not intended to limit the scope of the invention. Any changes or adjustments to their relative relationships, without substantially altering the technical content, should also be considered within the scope of the invention. Example 1

[0046] Combined with appendix Figure 1-13 This embodiment provides a tire trimming device, including a gantry frame 1, such as... Figure 3 As shown, the gantry frame 1 includes a first side wall 11, a second side wall 12, and a crossbeam 13. A motor 2 is mounted on the first side wall 11, and the output end of the motor 2 is connected to a rotating shaft 3. A radial expansion mechanism 4 is mounted on the rotating shaft 3. Figure 9 As shown, the radial expansion mechanism 4 includes a plurality of radial telescopic members 42 equidistantly arranged around the circumference of the rotating shaft 3 and a telescopic control 41 connected thereto. The free end of the radial telescopic member 42 is connected to an arc-shaped block 43. The radial telescopic member 42 can push the arc-shaped block 43 to fit tightly against the circumferential inner wall of the tire 9, such as... Figure 3 As shown, a tire crown and shoulder scraper 75 is provided below the radial expansion mechanism 4, and tire bead scrapers 53 are provided on both sides of the axial direction.

[0047] In the above technical solution, the tread and shoulder scraper 75 is used to scrape off the burrs at the tread and shoulder of the tire 9, and can be fixed to the circumferential outer wall of the tire 9 in any suitable manner; the bead scraper 53 is used to scrape off the burrs at the bead of the tire 9, and can be fixed to the bead of the tire 9 in any suitable manner. The radial expansion mechanism 4 includes, but is not limited to, a pneumatic telescopic structure and an electric telescopic structure.

[0048] The working principle and process of this embodiment are as follows: The tire 9 is placed coaxially on the radial expansion mechanism 4 on the rotating shaft 3. The radial expansion member 42 is controlled to extend radially through the telescopic control 41 until the outer wall of the arc block 43 is tightly attached to the circumferential inner wall of the tire 9. The multiple circumferentially equidistant radial expansion members 42 and arc blocks 43 can support and fix the tire 9 from the inside. The positions of the tire crown and shoulder scraper 75 and the tire bead scraper 53 are adjusted so that the blade of the tire crown and shoulder scraper 75 is close to the tire crown and shoulder of the tire 9, and the blade of the tire bead scraper 53 is close to the tire bead of the tire 9. The motor 2 is turned on to drive the rotating shaft 3 and the radial expansion mechanism 4 to rotate. Under the action of friction between the circumferential inner wall of the tire 9 and the outer wall of the arc block 43, the tire 9 rotates synchronously. The tire crown and shoulder scraper 75 and the tire bead scraper 53 scrape off the burrs on the tire crown, shoulder and bead of the tire 9.

[0049] In this embodiment, by supporting and fixing the tire from the inside of the tire 9, the limitations of the traditional fixing method on the trimming area are eliminated, and the tire crown, tire shoulder and tire bead of the tire 9 can be trimmed at the same time, which greatly improves the work efficiency.

[0050] In a specific technical solution, such as Figures 8 to 10As shown, the radial telescopic component 42 includes a sealed and slidably fitted inner cylinder 421 and an outer cylinder 422. The inner cylinder 421 is open at both ends and fixed to the rotating shaft 3. The free end of the outer cylinder 422 is sealed and fixed to the inner wall of the arc-shaped block 43. The outer wall of the arc-shaped block 43 is provided with an anti-slip layer 431. The telescopic control 41 is connected to the air source and the inner cylinder 421 respectively. In the above technical solution, the anti-slip layer 431 can increase the friction between the tire 9 and the arc-shaped block 43, and improve the rotational stability of the tire 9. During trimming, the telescopic control 41 fills the inner cylinder 421 with gas from the air source. Under the action of gas pressure, the outer cylinder 422 extends away from the inner cylinder 421, pushing the arc-shaped block 43 to fit tightly against the circumferential inner wall of the tire 9. After trimming is completed, the gas can be withdrawn through the telescopic control 41, and the outer cylinder 422 returns to its original position under negative pressure. In this embodiment, a sealing slip ring 4211 is provided at the free end of the inner cylinder 421. The sealing slip ring 4211 can improve the sealing between the inner cylinder 421 and the outer cylinder 422, and can also play a limiting role to prevent the inner cylinder 421 and the outer cylinder 422 from completely separating.

[0051] In one specific technical solution, two cylinders 423 parallel to the rotating shaft 3 are equidistantly arranged on the outer cylinder 422. The piston rod 424 of the cylinder 423 is connected to the pressure block 44. A ring 425 is fixed on the outer cylinder 422. The ring 425 has an annular cavity 4251 inside. One end of the annular cavity 4251 is sealed and connected to the sealed air chambers of the two cylinders 423, and the other end is connected to the telescopic control 41 through a hose (not shown in the figure). When the piston rod 424 is extended, the pressure block 44 can tightly fit against the inner sidewall of the tire 9. In the above technical solution, since the pressure block 44 can tightly fit against the inner sidewall of the tire 9, the outer sidewall of the pressure block 44 has a curved surface corresponding to the inner sidewall of the tire 9. This is simplified in the figure and is directly shown as a flat plate. The pressure block 44 is preferably fan-shaped, and the outer sidewall is designed with anti-slip features, which can ensure a compact structure and increase the contact area with the tire 9, thereby improving the friction between them. During trimming, the telescopic control 41 first introduces gas into the inner cylinder 421, driving the outer cylinder 422 to extend radially, so that the arc-shaped block 43 fits tightly against the circumferential inner wall of the tire 9. Then, the gas is introduced into the cylinder 423, driving the piston rod 424 to extend, so that the pressure block 44 fits tightly against the inner sidewall of the tire 9. Through the double fit and support of the circumferential inner wall and the two inner sidewalls of the tire 9, the friction between the tire 9 and the radial expansion mechanism 4 is further increased, and the rotational stability of the tire 9 is improved.

[0052] In one specific technical solution, the rotating shaft 3 is axially sealed with a first air passage 31 and a second air passage 32. The telescopic control 41 includes a fixed ring 411 and a moving ring 412. The fixed ring 411 is fixed on the first side wall 11 and is rotatably and sealingly connected to the rotating shaft 3. The inner wall of the fixed ring 411 is provided with a first fixed ring cavity 4111 that connects the first air passage 31 and the air source, and a second fixed ring cavity 4112 that connects the second air passage 32 and the air source. The moving ring 412 is fixedly sleeved on the rotating shaft 3. A plurality of inner cylinders 421 are provided equidistantly on the outer wall. The inner wall is provided with a first moving ring cavity 4121 that connects the first air passage 31 and the inner cylinder 421, and a second moving ring cavity 4122 that connects the hose and the second air passage 32. In the above technical solution, the telescopic control 41 serves as a gas guiding medium, selectively introducing gas from the gas source into the first air passage 31 or the second air passage 32 of the rotating shaft 3. Then, the gas in the first air passage 31 is introduced into the inner cylinder 421, driving the outer cylinder 422 to extend radially. The gas in the second air passage 32 is introduced into the cylinder 423, driving the piston rod 424 to extend axially. When reset is required, the gas can simply be withdrawn along its original path. A further structural feature of the above technical solution is as follows:

[0053] The outer wall of the fixed ring 411 is provided with a first air inlet 4113 communicating with the first fixed ring cavity 4111 and a second air inlet 4114 communicating with the second fixed ring cavity 4112. The first air inlet 4113 and the second air inlet 4114 are respectively connected to an air source. The outer wall of the moving ring 412 is provided with a plurality of first air holes 4123 communicating with the first moving ring cavity 4121 and second air holes 4124 communicating with the second moving ring cavity 4122 at equal intervals. The inner cylinder 421 is sealed to the first air holes 4123, and the hose is sealed to the first air holes 4123. The rotating shaft 3 is connected to the second air hole 4124. It is radially provided with a first through hole 311 connecting the first air passage 31 and the first fixed ring cavity 4111, a second through hole 312 connecting the first air passage 31 and the first moving ring cavity 4121, a third through hole 321 connecting the second air passage 32 and the second fixed ring cavity 4112, and a fourth through hole 322 connecting the second air passage 32 and the second moving ring cavity 4122. The free end of the rotating shaft 3 is axially provided with the first air passage 31 and the second air passage 32. The sealing end cap 33 blocks the free end of the rotating shaft 3.

[0054] In a specific technical solution, such as Figure 7As shown, the gantry frame 1 is equipped with a sidewall clamping mechanism 5. The sidewall clamping mechanism 5 includes two clamping members 51 symmetrically arranged on both sides of the radial expansion mechanism 4. Each clamping member 51 includes a rotatably connected connecting ring 511 and a pressure ring 512. The pressure ring 512 can press and clamp the sidewall of the tire 9 with the pressure block 44. The connecting ring 511 is equipped with a tire bead scraper 53. One connecting ring 511 is fixed to the inner side of the first sidewall 11, and the other connecting ring 511 is connected to a sliding mechanism 52. The sliding mechanism 52 is located on the second sidewall 12 and can control the clamping member 51 to move closer to or away from the radial expansion mechanism 4. In the above technical solution, the pressure ring 512 on the sidewall clamping mechanism 5 can cooperate with the pressure block 44 to press and clamp the sidewall of the tire 9. Through pressing and clamping, the friction between the tire 9 and the pressure block 44 of the radial expansion mechanism 4 can be greatly increased, thereby greatly improving the rotational stability of the tire 9. During trimming, the radial expansion mechanism 4 is first radially expanded so that the arc block 43 fits against the circumferential inner wall of the tire 9. Then, it is axially expanded so that the pressure block 44 fits against the inner sidewall of the tire 9. The pressure ring 512 at the first sidewall 11 is tightly connected with the pressure block 44 near the first sidewall 11, squeezing and clamping the sidewall of the tire 9 near the first sidewall 11. Then, the sliding mechanism 52 drives another clamping member 51 to approach the radial expansion mechanism 4 until its pressure ring 512 is tightly connected with the pressure block 44 near the second sidewall 11, squeezing and clamping the sidewall of the tire 9 near the second sidewall 12. After clamping is completed, the motor 2 is started, the rotating shaft 3 rotates, and the radial expansion mechanism 4, pressure ring 512 and tire 9 rotate synchronously.

[0055] In one specific structure, the tire bead scraper 53 includes a first blade holder 531 axially fixed to the connecting ring 511, and a first blade 532 is provided on the first blade holder 531. The first blade 532 extends axially to the tire bead of the tire 9. The tire bead scraper 53 of the present invention is not limited to the above structure. Any structure that enables the first blade 532 to extend to the tire bead is applicable to the present invention. For example, the first blade 532 can be axially extended and retracted under automatic or manual drive, automatically extending to the tire bead.

[0056] In one specific technical solution, the sliding mechanism 52 includes a horizontal rod 521 connected to the connecting ring 511. The horizontal rod 521 is connected to a central sliding rod 522. The connecting ring 511 is provided with a plurality of guide sliding rods 523 equidistantly arranged axially. The central sliding rod 522 and the guide sliding rods 523 can slide through the second sidewall 12. A first spring 524 is respectively sleeved on the central sliding rod 522 and the guide sliding rod 523. The first spring 524 is connected to the second sidewall 12. The crossbeam 13 is provided with a vertical slide groove 121, within which a first slider 525 is provided. The first slider 525 is hinged to a connecting rod 527, and the other end of the connecting rod 527 is hinged to the horizontal rod 521. A vertically arranged second spring 526 connects the first slider 525 and the vertical slide groove 121. A vertical lifting mechanism 6 is provided on the crossbeam 13. The vertical lifting mechanism 6 can drive the first slider 525 to slide down, and push the clamping member 51 closer to the radial expansion mechanism 4 through the connecting rod 527. In the above technical solution, the central slide rod 522 and the guide slide rod 523 cooperate with each other to ensure the displacement stability of the clamping member 51. The first spring 524 and the second spring 526 can drive the clamping member 51 to reset and move away from the radial expansion mechanism 4.

[0057] In a specific technical solution, such as Figure 11As shown, the gantry frame 1 is provided with a circumferential clamping mechanism 7. The circumferential clamping mechanism 7 includes an upper clamping seat 71 and a lower clamping seat 72 located on the upper and lower sides of the radial expansion mechanism 4. The lower end face of the upper clamping seat 71 and the upper end face of the lower clamping seat 72 are provided with semi-circular placement grooves 73 corresponding to the circumferential outer wall of the tire 9. A plurality of rolling elements 74 that abut against the circumferential outer wall of the tire 9 are provided equidistantly on the inner circumference of the placement grooves 73. The upper clamping seat 71 is connected to the vertical lifting mechanism 6. In the above technical solution, the rolling element 74 on the circumferential clamping mechanism 7 can cooperate with the arc-shaped block 43 to perform circumferential compression clamping on the tire 9. Through compression clamping, the friction between the tire 9 and the arc-shaped block 43 of the radial expansion mechanism 4 can be greatly improved, thereby greatly improving the rotational stability of the tire 9. The rolling element 74 includes, but is not limited to, universal balls and rollers. In this embodiment, a series roller structure is adopted, and several series rollers are equidistantly distributed on the circumference of the placement groove 73. It should be noted that since the circumferential outer wall of the tire 9 is a curved surface with a certain curvature, the rollers also adopt a corresponding curved series state. The attached drawings of this embodiment are simplified and directly use straight series to show this. In addition, the lower clamping seat 72 of the circumferential clamping mechanism 7 can play a supporting and positioning role for the tire 9. During trimming, the tire 9 is placed in the lower clamping seat 72, with one sidewall of the tire 9 directly pressed against the pressure ring 512 at the first sidewall 11, at which point the tire 9 enters a stable upright state; then the radial expansion mechanism 4 is driven to expand radially and then axially, so that the arc block 43 fits against the circumferential inner wall of the tire 9, and the pressure block 44 fits against the inner sidewall of the tire 9. Finally, the vertical lifting mechanism 6 drives the upper clamping seat 71 to dock with the lower clamping seat 72, while the sliding mechanism 52 pushes another clamping member 51 closer to the radial expansion mechanism 4 until its pressure ring 512 is tightly docked with the pressure block 44 near the second sidewall 12; after clamping is completed, the motor 2 is started, the rotating shaft 3 rotates, and the radial expansion mechanism 4, pressure ring 512, rolling member 74 and tire 9 rotate synchronously.

[0058] In a specific technical solution, such as Figure 7As shown, the vertical lifting mechanism 6 includes a hydraulic cylinder 61 mounted on the crossbeam 13. The output end of the hydraulic cylinder 61 is connected to a lifting rod 62. The bottom of the lifting rod 62 is connected to the upper clamping seat 71 and a vertical pressure rod 63. When the lifting rod 62 is pressed down, the vertical pressure rod 63 can drive the first slider 525 to move downward. The lower clamping seat 72 is provided with a tire crown and shoulder scraper 75. In the above technical solution, when the output end of the hydraulic cylinder 61 extends, it can simultaneously drive the upper clamping seat 71 and the clamping member 51 connected to the sliding mechanism 52 to move to the target position. When driving the first slider 525 to slide down, the vertical pressure rod 63 does not need to be directly connected to the first slider 525; it only needs to abut against the first slider 525 or abut against the first slider 525 after descending to a certain extent. After the trimming is completed, the output end of the hydraulic cylinder 61 shortens and resets, causing the upper clamping seat 71 to move upward and reset. The vertical pressure rod 63 releases the first slider 525. Under the action of the rebound force of the first spring 524 and the second spring 526, the sliding mechanism 52 drives the clamping member 51 connected to it to reset and move away from the radial expansion mechanism 4.

[0059] To further improve lifting stability, a first guide groove 111 is vertically provided on the inner side of the first side wall 11, and a second guide groove 122 is vertically provided on the inner side of the second side wall 12. The two ends of the lifting rod 62 are vertically slidably connected to the first guide groove 111 and the second guide groove 122. To reduce the impact of docking, a buffer pad 76 is provided at the docking point of the upper clamping seat 71 and the lower clamping seat 72.

[0060] In a specific structure, such as Figure 12 and Figure 13 As shown, the tire crown and shoulder scraper 75 includes a second blade holder 751 fixed on a lower clamping seat 72. A second groove 752 is vertically provided within the second blade holder 751, and a second slider 753 is provided within the second groove 752. A second blade 754 and a locking bolt 755 are fixedly provided on the second slider 753. The second blade 754 can be retracted into the second groove 752 along with the second slider 753, and the locking bolt 755 can lock the second slider 753. The tire crown and shoulder scraper 75 of this invention is not limited to the above structure; any structure that allows for manual or automatic adjustment of the retraction and retraction of the second blade 754 is applicable to this invention.

[0061] In a specific technical solution, such as Figure 11As shown, the lower clamping seat 72 has a hollow structure, with a collection mechanism 8 communicating with it at the bottom. The collection mechanism 8 includes a rectangular support frame 81 that is pull-out and a waste bin 82. The support frame 81 is fixedly connected to the lower clamping seat 72, and the top of the waste bin 82 is open and communicates with the lower clamping seat 72. In the above technical solution, the burrs trimmed by the tire crown and shoulder scraper 75 and the tire bead scraper 53 can fall directly into the waste bin 82. When the waste bin 82 is full, it can be emptied simply by pulling it out of the support frame 81. Example 2

[0062] Combined with appendix Figure 1-13 This embodiment provides a method for using a tire trimming device, including the following steps:

[0063] Step S100. Place the tire 9 coaxially on the radial expansion mechanism 4 on the rotating shaft 3. Control the outer cylinder 422 of the radial telescopic member 42 to extend radially through the telescopic control 41 until the outer wall of the arc block 43 is tightly attached to the circumferential inner wall of the tire 9. Then control the piston rod 424 of the cylinder 423 to extend axially until the pressure block 44 is tightly attached to the inner wall of the tire 9. This provides contact support for the circumferential inner wall and the two inner walls of the tire 9, thereby increasing the friction between the tire 9 and the radial expansion mechanism 4.

[0064] Step S200. Adjust the positions of the tread and shoulder scraper 75 and the bead scraper 53 so that the blade of the tread and shoulder scraper 75 is close to the tread and shoulder of the tire 9, and the blade of the bead scraper 53 is close to the bead of the tire 9.

[0065] Step S300. Turn on the motor 2 to drive the rotating shaft 3 and the radial expansion mechanism 4 to rotate. Under the action of friction between the circumferential inner wall of the tire 9 and the arc block 43, and between the two inner sidewalls of the tire 9 and the pressure block 44, the tire 9 rotates synchronously. The tire crown and shoulder scraper 75 and the tire bead scraper 53 scrape off the burrs at the tire crown, shoulder and bead of the tire 9.

[0066] The above embodiments are preferred embodiments of the present invention, but the embodiments of the present invention are not limited to the above embodiments. Any changes, modifications, substitutions, combinations, or simplifications made without departing from the spirit and principle of the present invention shall be considered equivalent substitutions and shall be included within the protection scope of the present invention.

Claims

1. A tire trimming device, comprising a gantry frame (1), said gantry frame (1) comprising a first sidewall (11), a second sidewall (12), and a crossbeam (13), characterized in that, The first sidewall (11) is provided with a motor (2), the output end of the motor (2) is connected to a rotating shaft (3), the rotating shaft (3) is provided with a radial expansion mechanism (4), the radial expansion mechanism (4) includes a plurality of radial telescopic members (42) equidistantly arranged around the circumference of the rotating shaft (3) and a telescopic control (41) connected thereto, the free end of the radial telescopic member (42) is connected to an arc block (43), the radial telescopic member (42) can push the arc block (43) to fit tightly against the circumferential inner wall of the tire (9), a tire crown and shoulder scraper (75) is provided below the radial expansion mechanism (4), and tire bead scrapers (53) are provided on both sides of the axial direction respectively. The radial telescopic component (42) includes a sealed and slidably sleeved inner cylinder (421) and an outer cylinder (422). Two cylinders (423) parallel to the rotating shaft (3) are equidistantly arranged on the circumference of the outer cylinder (422). The piston rod (424) of the cylinder (423) is connected to the pressure block (44). The gantry (1) is provided with a side wall clamping mechanism (5). The side wall clamping mechanism (5) includes two clamping members (51) symmetrically arranged on both sides of the radial expansion mechanism (4). The clamping member (51) includes a rotatably connected connecting ring (511) and a pressure ring (512). The pressure ring (512) can squeeze and clamp the side wall of the tire (9) with the pressure block (44). The connecting ring (511) is provided with a tire bead scraper (53). One of the connecting rings (511) is fixedly arranged on the inner side of the first side wall (11), and the other connecting ring (511) is connected to a sliding mechanism (52). The sliding mechanism (52) is arranged on the second side wall (12) and can control the clamping member (51) to move closer to or away from the radial expansion mechanism (4).

2. The tire trimming device according to claim 1, characterized in that, The inner cylinder (421) is open at both ends and fixed to the rotating shaft (3). The free end of the outer cylinder (422) is sealed and fixed to the inner wall of the arc block (43). The outer wall of the arc block (43) is provided with an anti-slip layer (431). The telescopic control (41) is connected to the air source and the inner cylinder (421) respectively.

3. The tire trimming device according to claim 2, characterized in that, A ring (425) is fixedly provided on the outer cylinder (422). An annular cavity (4251) is provided inside the ring (425). One end of the annular cavity (4251) is sealed and connected to the sealed air chambers of two cylinders (423), and the other end is connected to the telescopic control (41) through a hose. When the piston rod (424) is extended, the pressure block (44) can fit tightly against the inner wall of the tire (9).

4. A tire trimming device according to claim 3, characterized in that, The rotating shaft (3) is axially sealed with a first air passage (31) and a second air passage (32). The telescopic control (41) includes a fixed ring (411) and a moving ring (412). The fixed ring (411) is fixed on the first side wall (11) and is rotatably and sealed with the rotating shaft (3). The inner wall of the fixed ring (411) is provided with a first fixed ring cavity (4111) that connects the first air passage (31) and the air source, and a second fixed ring cavity (4112) that connects the second air passage (32) and the air source. The moving ring (412) is fixedly sleeved on the rotating shaft (3). The outer wall is provided with a plurality of inner cylinders (421) equidistantly spaced. The inner wall is provided with a first moving ring cavity (4121) that connects the first air passage (31) and the inner cylinder (421), and a second moving ring cavity (4122) that connects the hose and the second air passage (32).

5. A tire trimming device according to claim 4, characterized in that, The sliding mechanism (52) includes a horizontal rod (521) connected to the connecting ring (511), the horizontal rod (521) being connected to a central slide rod (522), and the connecting ring (511) having a plurality of guide slide rods (523) equidistantly arranged on its axial circumference. The central slide rod (522) and the guide slide rods (523) are slidably passed through the second sidewall (12). A first spring (524) is respectively sleeved on the central slide rod (522) and the guide slide rod (523), and the first spring (524) is connected to the second sidewall (12). The second sidewall (12) has a vertical slide rod. The groove (121) is provided with a first slider (525), the first slider (525) is hinged to a connecting rod (527), the other end of the connecting rod (527) is hinged to the horizontal rod (521), and a vertically arranged second spring (526) is connected to the first slider (525) and the vertical groove (121) respectively. The crossbeam (13) is provided with a vertical lifting mechanism (6), which can drive the first slider (525) to slide down and push the clamping member (51) closer to the radial expansion mechanism (4) through the connecting rod (527).

6. A tire trimming device according to claim 5, characterized in that, The gantry (1) is provided with a circumferential clamping mechanism (7). The circumferential clamping mechanism (7) includes an upper clamping seat (71) and a lower clamping seat (72) located on the upper and lower sides of the radial expansion mechanism (4). The lower end face of the upper clamping seat (71) and the upper end face of the lower clamping seat (72) are provided with semi-circular placement grooves (73) corresponding to the circumferential outer wall of the tire (9). A number of rolling elements (74) that abut against the circumferential outer wall of the tire (9) are provided equidistantly on the inner circumference of the placement groove (73). The upper clamping seat (71) is connected to the vertical lifting mechanism (6).

7. A tire trimming device according to claim 6, characterized in that, The vertical lifting mechanism (6) includes a hydraulic cylinder (61) mounted on the crossbeam (13). The output end of the hydraulic cylinder (61) is connected to a lifting rod (62). The bottom of the lifting rod (62) is connected to the upper clamping seat (71) and the vertical pressure rod (63). When the lifting rod (62) is pressed down, the vertical pressure rod (63) can drive the first slider (525) to move down. The lower clamping seat (72) is provided with a tire crown and shoulder scraper (75).

8. A tire trimming device according to claim 7, characterized in that, The lower clamping seat (72) is a hollow structure, and a collection mechanism (8) connected to it is provided below. The collection mechanism (8) includes a rectangular support frame (81) that is pulled out and a waste bin (82). The support frame (81) is fixedly connected to the lower clamping seat (72), and the top of the waste bin (82) is open and connected to the lower clamping seat (72).

9. The method of using the tire trimming device according to claim 8, characterized in that, Includes the following steps: Step S100. Place the tire (9) coaxially on the radial expansion mechanism (4) on the rotating shaft (3), and control the outer cylinder (422) of the radial telescopic component (42) to extend radially through the telescopic control (41) until the outer wall of the arc block (43) is tightly attached to the circumferential inner wall of the tire (9). Then control the piston rod (424) of the cylinder (423) to extend axially until the pressure block (44) is tightly attached to the inner wall of the tire (9), and provide support for the circumferential inner wall and the two inner walls of the tire (9) to increase the friction between the tire (9) and the radial expansion mechanism (4). Step S200. Adjust the positions of the crown and shoulder scraper (75) and the bead scraper (53) so that the blade of the crown and shoulder scraper (75) is close to the crown and shoulder of the tire (9) and the blade of the bead scraper (53) is close to the bead of the tire (9). Step S300. Turn on the motor (2) to drive the rotating shaft (3) and the radial expansion mechanism (4) to rotate. Under the action of friction between the circumferential inner wall of the tire (9) and the arc block (43) and the two inner sidewalls of the tire (9) and the pressure block (44), the tire (9) rotates synchronously. The tire crown and shoulder scraper (75) and the tire bead scraper (53) scrape off the burrs at the tire crown, shoulder and bead of the tire (9).

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