Online puncturing device for side wall of aircraft tire

Abstract

The utility model discloses an aviation tire sidewall online puncturing device which comprises a front conveying roller way, a rear conveying roller way and at least one set of pressing wheel assembly arranged between the front conveying roller way and the rear conveying roller way, the front conveying roller way and the rear conveying roller way are driven by a conveying roller way motor to achieve synchronous work, a puncturing needle mechanism is arranged below the pressing wheel assembly, and the puncturing needle mechanism comprises an installation frame. The driving chain wheel set, the driven chain wheel set and the transition chain wheel sets are rotationally connected to the mounting frame, the two transition chain wheel sets, the driving chain wheel set and the driven chain wheel set form trapezoidal structure arrangement, and the supporting plate chain wraps the outer sides of supporting plate chain wheels on the two sides of the driving chain wheel set, the driven chain wheel set and the transition chain wheel sets. At least one set of supporting plate assembly with the puncturing needle is fixed to the supporting plate chain, the linear speed of the supporting plate chain is the same as that of the front conveying roller way and the rear conveying roller way, the included angle between the puncturing needle and the sidewall is smaller than 12 degrees, the angle between the puncturing needle and the sidewall is effectively reduced, and the length of a groove pulled out of a sidewall product by the puncturing needle is shortened.

Description

TECHNICAL FIELD

[0001] The utility model relates to tire production equipment technical field, concretely relates to an aviation tire side online puncture device. BACKGROUND

[0002] In the tire forming process, air is easy to accumulate in the gap between the tire side and the tire body, if the tire side is not provided with a vent hole for exhausting air, the internal air cannot be exhausted in the subsequent forming and vulcanization process, thereby producing bubbles to cause tire waste products, so in the tire side extrusion composite production line, the tire side puncture becomes one of the key links.

[0003] The existing puncture device mainly adopts two structures, one structure is a plate type puncture device, due to the structure limitation, the tire side is in a static state in the puncture process, which belongs to a non-online puncture, and the puncture efficiency is low, and the other structure is a roller type puncture device, the puncture needles are uniformly installed on the surface of the roller, and the puncture needles are inserted into the tire side to complete the tire side puncture while the roller rolls on the surface of the tire side, the structure is in a moving state in the puncture process, which belongs to an online puncture, and the puncture efficiency is high.

[0004] The tire side thickness of automobile tires and engineering tires is usually below 15mm, and the tire side thickness of aviation tires is designed to be thicker than that of automobile tires and engineering tires to adapt to the extreme temperature change and pressure generated by the aircraft during high-speed flight, and is usually above 25mm, and the tire side thickness of large specification aviation tires is above 30mm. When the roller type puncture device is used to puncture the tire side of the aviation tire, the length of the puncture needle needs to be designed to be long due to the large size of the tire side thickness, and the angle of the puncture needle when penetrating into the tire side and separating from the tire side is large, so that the puncture needle drags a long groove on the tire side product, which seriously affects the dynamic balance and overall quality of the tire. UTILITY MODEL CONTENTS

[0005] The utility model discloses a aviation tire side online puncture device, which effectively reduces the angle of the puncture needle when penetrating into and separating from the tire side during the online synchronous puncture process of the tire side of the aviation tire, and shortens the length of the groove dragged by the puncture needle on the tire side product.

[0006] To achieve the above object, the utility model provides the following technical scheme:

[0007] The utility model provides an aviation tire tire side online puncture device, including front conveying roller way, rear conveying roller way, at least one set of pressure wheel assembly is arranged between front conveying roller way and rear conveying roller way, and front conveying roller way and rear conveying roller way adopt conveying roller motor drive to realize synchronous work, it is characterized by: the puncture needle mechanism is provided below the pressure wheel assembly, the puncture needle mechanism includes mounting frame, driving sprocket group, driven sprocket group, transition sprocket group rotation is connected on mounting frame, the number of transition sprocket group is 2 sets, and 2 sets of transition sprocket group are arranged left and right in horizontal direction and are located above driving sprocket group and driven sprocket group, and 2 sets of transition sprocket group and driving sprocket group, driven sprocket group form the trapezoidal structure arrangement, and the both sides of driving sprocket group, driven sprocket group and transition sprocket group are equipped with the chain wheel of supporting plate, and the chain of supporting plate is enveloped in the outside of the chain wheel of supporting plate and forms the envelope line of trapezoidal structure, and the chain of supporting plate is equipped with mounting hole, and at least one set of the supporting plate assembly with puncture needle is fixedly connected with the chain of supporting plate on both sides through the mounting hole, and the second sprocket is equipped on driving sprocket group, and the second sprocket is connected with the first sprocket of the first chain of being installed on the puncture mechanism motor, and the linear velocity of the chain of supporting plate operation is same with the linear velocity of front conveying roller way and rear conveying roller way operation, and the angle alpha of the upper surface of supporting plate assembly between driven sprocket group and left transition sprocket group and horizontal direction is less than 12 DEG, and the angle beta of the upper surface of supporting plate assembly between driving sprocket group and right transition sprocket group and horizontal direction is less than 12 DEG.

[0008] Further, the chain of supporting plate includes the inner side link plate of triangular shape, the outer side link plate rotationally connected with the inner side link plate by a rotating pin, the inner side link plate is located inside the outer side link plate, the distance between the two rotating pins on the inner side link plate is equal to the distance between the two rotating pins on the outer side link plate, the two side plates of the outer side link plate extend upward and are bent in the forward and backward directions to form a horizontal plate of the same height, the mounting hole is provided on the horizontal plate, the left and right sides of the upper part of the outer side link plate are provided with circular-arc-shaped positioning grooves, the inner side link plate is provided with a positioning pin corresponding to the positioning grooves, the length of the positioning pin is greater than the width of the two side plates of the outer side link plate, and the diameter of the positioning pin is the same as the diameter of the circular-arc-shaped positioning grooves.

[0009] Further, the supporting plate assembly includes a supporting plate and puncture needles threadedly connected with the supporting plate, the puncture needles are uniformly arranged on the supporting plate, and the supporting plate is connected with the mounting hole of the horizontal plate of the outer side link plate by a countersunk screw.

[0010] Further, the utility model also includes at least one adjusting mechanism for tensioning the chain of supporting plate.

[0011] Further, the adjusting mechanism is arranged on both sides of the passive sprocket set, the adjusting mechanism comprises an adjusting plate arranged between the wall plate and the passive end bearing seat, a vertical plate vertically welded with the adjusting plate, an adjusting screw welded on the vertical plate and parallel to the adjusting plate, and a supporting plate sleeved on the adjusting screw and fixedly connected with the mounting frame, the adjusting plate is provided with a waist-shaped hole, the adjusting plate is connected with the passive end bearing seat through a screw and connected with the wall plate through a screw penetrating through the waist-shaped hole, and adjusting nuts are arranged on both sides of the adjusting screw and located on the supporting plate.

[0012] Further, the compression wheel assembly comprises a "door" shaped support fixed above the mounting frame and a compression roller driven by the air cylinder to move up and down, a sliding plate with a sliding groove is arranged on the inner side of the support, the compression roller is in sliding connection with the sliding groove, and the compression roller is provided with circumferentially arranged annular grooves corresponding to the arrangement positions of the piercing needles.

[0013] Further, the number of the compression wheel assemblies is two sets, one set is fixed above the left transition sprocket set, and the other set is fixed above the right transition sprocket set.

[0014] Compared with the prior art, the beneficial effects of the utility model are as follows:

[0015] 1. The angle α between the upper surface of the supporting plate assembly between the passive sprocket set and the left transition sprocket set and the horizontal direction and the angle β between the upper surface of the supporting plate assembly between the driving sprocket set and the right transition sprocket set and the horizontal direction are small angles in the range of less than 12°, effectively reducing the angle of the piercing needle piercing and separating from the sidewall, shortening the length of the groove dragged out by the piercing needle on the sidewall product, and improving the dynamic balance and overall quality of the tire.

[0016] 2. The supporting plate assembly with the piercing needle is enveloped outside the supporting plate sprocket of the driving sprocket set, the passive sprocket set and the transition sprocket set to form an envelope line in a trapezoidal structure, the piercing needle on the supporting plate assembly is continuously pierced on the lower side of the sidewall by driving the piercing mechanism motor, and the production efficiency is high.

[0017] 3. The linear speed of the supporting plate chain is the same as the linear speed of the front and rear conveying roller ways, so that the phenomenon that the piercing needle drags out a groove on the sidewall product due to the speed difference is avoided.

[0018] 4. By adjusting the adjusting mechanism on both sides of the passive sprocket set, the tightness of the supporting plate chain can be adjusted, and the angle α between the upper surface of the supporting plate assembly before the sidewall enters the compression wheel assembly and the horizontal direction can also be adjusted, so that the piercing angle of the piercing needle can be adjusted, and the needs of production of various specifications can be met. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 is a structural schematic diagram of an embodiment of the utility model

[0020] Figure 2 is the structure schematic view of the puncture mechanism of the utility model

[0021] Figure 3 is Figure 2 structure schematic view of the plan view

[0022] Figure 4 is Figure 3 structure schematic view of the middle M-M section view

[0023] Figure 5 is Figure 4 the partial enlarged view of A in

[0024] Figure 6 is Figure 3 the partial enlarged view of B in

[0025] Figure 7 is Figure 6 structure schematic view of the N view in

[0026] Figure 8 is the structure schematic view of the main view of the utility model's supporting plate chain

[0027] Figure 9 is the structure schematic view of the left view of the utility model's supporting plate chain

[0028] Figure 10 is the structure schematic view of the utility model's compression wheel assembly

[0029] Figure 11 is Figure 10 structure schematic view of the E-E section view in

[0030] The drawing mark: front conveying roller 1, compression wheel assembly 2, compression roller 201, air cylinder 202, support 203, sliding plate 204, sliding groove 205, puncture mechanism 3, puncture mechanism motor 301, first sprocket 302, first chain 303, supporting plate sprocket 304, mounting frame 310, wallboard 311, driving sprocket set 320, second sprocket 321, driving end bearing seat 322, driven sprocket set 330, driven end bearing seat 331, transition sprocket set 340, supporting plate chain 350, inner chain plate 351, outer chain plate 352, positioning groove 353, positioning pin 354, rotating pin 355, supporting plate assembly 360, supporting plate 361, puncture needle 362, countersunk screw 363, adjusting mechanism 370, adjusting plate 371, vertical plate 372, adjusting screw 373, adjusting nut 374, supporting plate 375, waist type hole 376, rear conveying roller 4, conveying roller motor 5, side 6. DETAILED DESCRIPTION

[0031] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present utility model.

[0032] The online puncture device for aircraft tire sidewalls provided by this utility model, such as Figures 1 to 5 As shown, it includes a front conveyor roller conveyor 1, a rear conveyor roller conveyor 4, and at least one set of pressure roller assembly 2 arranged between the front conveyor roller conveyor 1 and the rear conveyor roller conveyor 4. The front conveyor roller conveyor 1 and the rear conveyor roller conveyor 4 are driven by a conveyor roller conveyor motor 5 to achieve synchronous operation. The key feature is that a needle-piercing mechanism 3 is provided below the pressure roller assembly 2. The needle-piercing mechanism 3 includes a mounting frame 310, a drive sprocket group 320, a driven sprocket group 330, and a transition sprocket group 340 rotatably connected to the mounting frame 310. There are two sets of transition sprocket groups 340, which are arranged horizontally to the left and right and located above the drive sprocket group 320 and the driven sprocket group 330. The two sets of transition sprocket groups 340, the drive sprocket group 320, and the driven sprocket group 330 form a trapezoidal structure. Figure 3 , 4 As shown, pallet sprockets 304 are provided on both sides of the drive sprocket group 320, the driven sprocket group 330, and the transition sprocket group 340. Pallet chains 350 wrap around the outside of the pallet sprockets 304, forming a trapezoidal envelope. The pallet chains 350 have mounting holes. At least one pallet assembly 360 with piercing needles 362 is fixedly connected to the pallet chains 350 on both sides through the mounting holes. A second sprocket 321 is provided on the drive sprocket group 320. The second sprocket 321 is connected to a first sprocket 302 mounted on the piercing mechanism motor 301 via a first chain 303. The linear speed of the pallet chain 350 is the same as the linear speed of the front conveyor roller 1 and the rear conveyor roller 4. Figure 2 As shown, the angle α between the upper surface of the support plate assembly 360 between the passive sprocket group 330 and the left transition sprocket group 340 and the horizontal direction is less than 12°, and the angle β between the upper surface of the support plate assembly 360 between the active sprocket group 320 and the right transition sprocket group 340 and the horizontal direction is less than 12°. That is to say, in this embodiment, the piercing angle of the piercing needle 362 piercing the tire sidewall 6 and the detachment angle of the piercing needle 362 detaching from the tire sidewall 6 are both less than 12°.

[0033] In the above embodiment, the upper surface of the support plate assembly 360 between the passive sprocket set 330 and the left transition sprocket set 340 forms an angle α with the horizontal direction, the upper surface of the support plate assembly 360 between the driving sprocket set 320 and the right transition sprocket set 340 forms an angle β with the horizontal direction, and the angle of penetration of the piercing needle 362 into the sidewall 6 is the angle between the axial direction of the piercing needle 362 and the vertical direction when the sidewall 6 enters the compression roller assembly 2. Since the upper surface of the support plate assembly 360 is perpendicular to the axial direction of the piercing needle 362, the angle of penetration is equal to the angle α. Similarly, the angle of disengagement of the piercing needle 362 from the sidewall 6 is the angle between the axial direction of the piercing needle 362 and the vertical direction after the sidewall 6 passes through the compression roller assembly 2. The angle of disengagement is equal to the angle β. In the above embodiment, the angle α between the upper surface of the support plate assembly 360 between the passive sprocket set 330 and the left transition sprocket set 340 and the horizontal direction, and the angle β between the upper surface of the support plate assembly 360 between the driving sprocket set 320 and the right transition sprocket set 340 and the horizontal direction can be set to a small angle within the range of less than 12°, so that the angle of penetration and disengagement of the piercing needle 362 into and from the sidewall 6 becomes a small angle within the range of less than 12°. It should be noted that the sidewall is not yet completely cooled during the piercing stage of the sidewall product, and needs to be placed at room temperature for a period of time before entering the molding process. During the placement period, the product will shrink due to natural cooling, and the groove on the lower surface of the sidewall 6 will shrink and shorten when the angle of penetration and disengagement is less than 12°. During the vulcanization stage, the groove produced at this angle will automatically fill and have no effect on the dynamic balance of the tire. Through the above embodiment, the angle of penetration and disengagement of the piercing needle 362 into and from the sidewall 6 is effectively reduced, and the angle of penetration and disengagement of the piercing needle 362 into and from the sidewall 6 is controlled to be less than 12°, greatly shortening the length of the groove dragged by the piercing needle 362 on the sidewall product, and improving the dynamic balance and overall quality of the tire.

[0034] In the above embodiment, the support plate assembly 360 with the piercing needle 362 is enveloped outside the support plate sprocket 304 of the driving sprocket set 320, the passive sprocket set 330 and the transition sprocket set 340 to form a trapezoidal envelope line, and the piercing mechanism motor 301 drives the piercing needle 362 on the support plate assembly 360 to continuously pierce the lower side of the sidewall 6 online, achieving high production efficiency.

[0035] In the above embodiment, the linear speed of the support plate chain 350 is the same as the linear speed of the front and rear conveying roller beds 1 and 4, avoiding the phenomenon of the piercing needle 362 dragging a groove on the sidewall 6 due to speed difference.

[0036] In another embodiment, as shown in Figure 8 , Figure 9As shown, the pallet chain 350 comprises triangular inner link plates 351, outer link plates 352 rotatably connected with the inner link plates 351 through rotating pins 355, the inner link plates 351 are located inside the outer link plates 352, the distance between the two rotating pins 355 on the inner link plates 351 is equal to the distance between the two rotating pins 355 on the outer link plates 352, the two side plates of the outer link plates 352 extend upwards and are bent in the forward and backward directions to form an isometric horizontal plate, the mounting holes are arranged on the horizontal plate, the outer link plates 352 are provided with circular arc-shaped positioning grooves 353 on the left and right sides of the upper portion, and the inner link plates 351 are provided with positioning pins 354 corresponding to the positioning grooves 353, the length of the positioning pins 354 is greater than the width of the two side plates of the outer link plates 352, and the diameter of the positioning pins 354 is the same as the diameter of the circular arc-shaped positioning grooves 353.

[0037] In the above embodiment, the pallet assembly 360 with the piercing needle 362 is arranged on the pallet chain 350 in a trapezoidal structure envelope, when the pallet assembly 360 is arranged in a horizontal state above the two transition sprocket sets 340, the pressure wheel assembly 2 applies a force downward on the sidewall 6, and the force is applied to the horizontal section of the pallet chain 350 through the pallet assembly 360, at this time, the centers of the positioning grooves 353 on the upper portions of the adjacent outer link plates 352 of the pallet chain 350 coincide with the centers of the positioning pins 354 on the inner link plates 351, and since the diameter of the positioning pins 354 is the same as the diameter of the circular arc-shaped positioning grooves 353, the horizontal section of the pallet chain 350 does not bend downward under the action of the external force, so that the pallet assembly 360 above the transition sprocket set 340 always maintains a horizontal state and does not affect the process of piercing the sidewall 6 by the downward bending of the pallet assembly 360.

[0038] In another embodiment, as shown in Figure 4 , Figure 5 The pallet assembly 360 comprises a pallet 361 and a piercing needle 362 threadedly connected with the pallet 361, the piercing needles 362 are uniformly arranged on the pallet 361, and the pallet 361 is connected with the mounting holes of the horizontal plate of the outer link plate 352 through the countersunk head screws 363.

[0039] In the above embodiment, the pallet 361 and the piercing needle 362 are connected in a detachable structure, when the piercing needle 362 is damaged, the damaged piercing needle 362 can be detached from the pallet 361, or the entire pallet assembly 360 can be detached from the pallet chain 350, so that the pallet assembly 360 is convenient to detach and maintain.

[0040] In another embodiment, as shown in Figure 2 , Figure 3 The utility model further comprises at least one adjusting mechanism 370 for tensioning the pallet chain 350.

[0041] Another embodiment, as shown in Figure 2 , Figure 3 , Figure 6 , Figure 7 adjusting mechanism 370 is placed between the wall plate 311 and the passive end bearing seat 331, the adjusting plate 371 is vertically welded with the stand plate 372, the adjusting screw 373 is welded on the stand plate 372 and parallel to the adjusting plate 371, the support plate 375 is sleeved on the adjusting screw 373 and fixedly connected with the mounting frame 310, the waist-shaped hole 376 is arranged on the adjusting plate 371, the adjusting plate 371 is connected with the passive end bearing seat 331 through the screw and connected with the wall plate 311 through the screw passing through the waist-shaped hole 376, and the adjusting nut 374 is arranged on the adjusting screw 373 on both sides of the support plate 375.

[0042] In the above embodiment, by adjusting the adjusting mechanism 370 on both sides of the passive sprocket set 330, the tightness of the supporting plate chain 350 can be adjusted, and the angle α between the upper surface of the front supporting plate assembly 360 and the horizontal direction when the sidewall 6 enters the pressure roller assembly 2 can be adjusted, so that the adjustment of the piercing needle penetration angle can be realized, and the needs of various specifications production can be met.

[0043] Another embodiment, as shown in Figure 10 , Figure 11 the pressure roller assembly 2 includes a “door” shaped bracket 203 fixed above the mounting frame 310 and a pressure roller 201 driven by the air cylinder 202 to move up and down, a sliding plate 204 with a sliding groove 205 is arranged on the inner side of the bracket 203, the pressure roller 201 is slidably connected with the sliding groove 205, and the pressure roller 201 is provided with a circumferential annular groove corresponding to the arrangement position of the piercing needle 362.

[0044] In the above embodiment, when the air cylinder 202 drives the pressure roller 201 to move up and down, the pressure roller 201 is slidably connected with the sliding groove 205 on both sides, so as to avoid the position deviation of the annular groove and the piercing needle 362 during the movement of the pressure roller 201.

[0045] Another embodiment, as shown in Figure 1 , Figure 10 , Figure 11 the number of the pressure roller assembly 2 is two sets, one set is fixed above the left transition sprocket set 340, and the other set is fixed above the right transition sprocket set 340.

[0046] In the above example, the sidewall 1 is forced multiple times by the two sets of pressure roller assemblies 2 to ensure that the piercing needle 362 pierces the sidewall 6 and improves the stability of the piercing. In addition, the air cylinders of the two sets of pressure roller assemblies can be set to different pressures, and the piercing process can be completed in a gradual pressing manner to avoid a large piercing resistance in the one-time piercing process.

[0047] In the prior art roller piercing device, the piercing needle 362 has a limited length of 30mm at least for the sidewall with a thickness of 25mm, and the piercing roller has an outer diameter of 180mm, and the piercing angle and the disengaging angle of the piercing needle 362 are about 38°, and only when the outer diameter of the piercing roller is changed to 3000mm, the piercing angle and the disengaging angle of the piercing needle 362 can be close to 12°, and obviously, the change of the diameter of the piercing roller to reduce the piercing angle and the disengaging angle is neither economical nor practical. Compared with the prior art roller piercing device, the utility model effectively reduces the piercing angle and the disengaging angle of the piercing needle 362 to the sidewall 6, and the piercing angle and the disengaging angle of the piercing needle 362 can be controlled within 12°, and the length of the groove dragged by the piercing needle 362 on the sidewall 6 is greatly shortened, and the dynamic balance and the overall quality of the tire are improved.

[0048] In the description of the utility model, it is necessary to explain that, unless otherwise specified and limited, the terms "connection", "fixing", "setting" and the like should be understood in a broad sense, for example, "fixing" can be fixed connection, or can be detachable connection, or can be integrated; can be mechanical connection, or can be electrical connection; can be directly connected, or can be indirectly connected through an intermediate medium; can be the internal communication of two elements or the interaction relationship of two elements, unless otherwise specified. In addition, the terms "left", "right", "up", "down", "front", "back", "inside", "outside", "back", "middle" and the like indicate the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the utility model and simplifying the description, and do not indicate or imply that the indicated device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the utility model.

[0049] In addition, the technical solutions of various embodiments of the utility model can be combined with each other, but must be based on the realization of the skilled person in the art, and when the combination of technical solutions appears contradictory or unachievable, it should be considered that the combination of technical solutions does not exist and is not within the protection scope required by the utility model.

Claims

1. An online puncture device for the sidewall of an aircraft tire, comprising a front conveyor roller (1), a rear conveyor roller (4), and at least one set of pressure roller assembly (2) arranged between the front conveyor roller (1) and the rear conveyor roller (4), wherein the front conveyor roller (1) and the rear conveyor roller (4) are driven synchronously by a conveyor roller motor (5), characterized in that: A needle-piercing mechanism (3) is provided below the pressure roller assembly (2). The needle-piercing mechanism (3) includes a mounting frame (310), a drive sprocket assembly (320), a driven sprocket assembly (330), and a transition sprocket assembly (340) which are rotatably connected to the mounting frame (310). There are two sets of transition sprocket assemblies (340). The two sets of transition sprocket assemblies (340) are arranged horizontally and are located above the drive sprocket assembly (320) and the driven sprocket assembly (330). The two sets of transition sprocket assemblies (340) form a trapezoidal structure with the drive sprocket assembly (320) and the driven sprocket assembly (330). On both sides of the drive sprocket assembly (320), the driven sprocket assembly (330), and the transition sprocket assembly (340), there are pallet sprockets (304). The pallet chain (350) wraps around the outside of the pallet sprocket (304) and forms a trapezoidal envelope. The pallet assembly (360) is provided with mounting holes. At least one pallet assembly (360) with piercing needles (362) is fixedly connected to the pallet chains (350) on both sides through the mounting holes. The drive sprocket group (320) is provided with a second sprocket (321). The second sprocket (321) is connected to the first sprocket (302) installed on the piercing mechanism motor (301) through the first chain (303). The linear speed of the pallet chain (350) is the same as the linear speed of the front conveyor roller (1) and the rear conveyor roller (4). The angle (α) between the upper surface of the pallet assembly (360) between the passive sprocket group (330) and the left transition sprocket group (340) and the horizontal direction is less than 12°. The angle (β) between the upper surface of the pallet assembly (360) between the drive sprocket group (320) and the right transition sprocket group (340) and the horizontal direction is less than 12°.

2. The online puncture device for aircraft tire sidewalls according to claim 1, characterized in that: The pallet chain (350) includes a triangular inner chain plate (351) and an outer chain plate (352) rotatably connected to the inner chain plate (351) via rotating pins (355). The inner chain plate (351) is located inside the outer chain plate (352). The distance between the two mounting rotating pins (355) on the inner chain plate (351) is equal to the distance between the two mounting rotating pins (355) on the outer chain plate (352). The two side plates of the outer chain plate (352) extend upward and separate... The plate is bent forward and backward to form a horizontal plate of equal height. The mounting holes are provided on the horizontal plate. The upper left and right sides of the outer chain plate (352) are provided with arc-shaped positioning grooves (353). The inner chain plate (351) is provided with positioning pins (354) corresponding to the positioning grooves (353). The length of the positioning pins (354) is greater than the width of the two side plates of the outer chain plate (352). The diameter of the positioning pins (354) is the same as the diameter of the arc-shaped positioning grooves (353).

3. The online puncture device for aircraft tire sidewalls according to claim 2, characterized in that: The pallet assembly (360) includes a pallet (361) and piercing needles (362) threadedly connected to the pallet (361). The piercing needles (362) are evenly arranged on the pallet (361). The pallet (361) is connected to the mounting hole of the horizontal plate on the outer chain plate (352) by countersunk screws (363).

4. The online puncture device for aircraft tire sidewalls according to any one of claims 1-3, characterized in that: It also includes at least one adjustment mechanism (370) for tensioning the support chain (350).

5. The online puncture device for aircraft tire sidewalls according to claim 4, characterized in that: The adjustment mechanism (370) is placed on both sides of the passive sprocket assembly (330). The adjustment mechanism (370) includes an adjustment plate (371) placed between the wall plate (311) and the passive end bearing seat (331), a vertical plate (372) welded perpendicularly to the adjustment plate (371), an adjustment screw (373) welded to the vertical plate (372) and parallel to the adjustment plate (371), and a support plate (375) sleeved on the adjustment screw (373) and fixedly connected to the mounting bracket (310). The adjustment plate (371) is provided with a waist-shaped hole (376). The adjustment plate (371) is connected to the passive end bearing seat (331) by screws and to the wall plate (311) by screws passing through the waist-shaped hole (376). Adjusting nuts (374) are provided on both sides of the support plate (375) on the adjustment screw (373).

6. The online puncture device for aircraft tire sidewalls according to any one of claims 1-3, characterized in that: The pressure roller assembly (2) includes a "door" shaped bracket (203) fixed above the mounting frame (310) and a pressure roller (201) driven to move up and down by a cylinder (202). A sliding plate (204) with a sliding groove (205) is provided on the inner side of the bracket (203). The pressure roller (201) is slidably connected to the sliding groove (205). The pressure roller (201) is provided with a circumferentially arranged annular groove, the position of which corresponds to the arrangement position of the piercing needle (362).

7. The online puncture device for aircraft tire sidewalls according to claim 6, characterized in that: The number of pressure roller assemblies (2) is 2 sets, one set is fixed directly above the left transition sprocket assembly (340), and the other set is fixed directly above the right transition sprocket assembly (340).

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