Tire puncture injection backfill repair device

Abstract

The invention relates to the technical field of injection molding equipment, and discloses a tire puncture injection backfill repair device which comprises a rack, a positioning seat is fixedly mounted on the bottom wall of the rack, a puncture glue injection mechanism is assembled on the top wall of the rack, and two sets of lateral clamping mechanisms in mirror symmetry are arranged on the left side and the right side of the rack; a linkage lifting mechanism is assembled on the top wall and on the rear side of the puncture glue injection mechanism, and a lining supporting mechanism is assembled below the linkage lifting mechanism; the linkage sliding rod is driven by the main driving device to accurately move downwards along the guide stand column, and the composite injection part and the puncture head are synchronously linked to complete the puncture action; the guide head is matched with the inclined surface of the inclined guide groove to realize automatic centering and clamping of the lateral clamping mechanism, so that the clamping blocks are stably attached to the two sides of the tire; by means of a transmission mechanism of a transmission rack and a reversing gear, the lining supporting mechanism moves reversely, and it is ensured that a liner groove is tightly attached to the inner wall of the tread; finally, collaborative operation of puncture positioning of the puncture head and double-side clamping of the clamping block is achieved, and the operation efficiency of tire repairing is remarkably improved.

Description

Technical Field

[0001] This invention relates to the field of injection molding equipment technology, and more specifically to a tire puncture injection backfill repair device. Background Technology

[0002] As a key component of a vehicle, the health of tires is directly related to driving safety. When cracks appear on the tire tread or sidewall, it will not only affect the normal performance of the tire (such as air tightness, strength, and grip), but also pose a huge safety hazard of tire blowout. Therefore, it is crucial to repair tires with cracks in a timely and effective manner.

[0003] Currently, several specialized devices have been proposed for tire crack repair. For example: Positioning device: For example, Chinese utility model patent with announcement number CN218477152U discloses a self-repairing tire processing tire positioning device; the device mainly includes a base plate, a support column and a clamping assembly; its core is to insert the clamping frame into the inner wall of the tire, use a threaded rod to drive the rotating block and the slider to move, and through the linkage mechanism of pull rope, spring, push plate, push rod and other mechanisms, finally drive the four sets of clamping plates to expand outward and fit tightly against the inner wall of the tire, thereby realizing the fixed positioning of the tire.

[0004] Inspection device: For example, Chinese utility model patent with announcement number CN213564492U discloses a tire crack inspection device that does not require inflation; its working process mainly involves: cleaning the cracked area on the tire surface with a brush, then heating and softening the cracked area with a heating block, and finally squeezing the heated crack with a top plate (or similar structure) in an attempt to melt and bond the crack edges, so as to prevent crack expansion and achieve the purpose of rapid inspection.

[0005] However, existing tire crack repair equipment of this type generally suffers from the following significant drawbacks: The repair mechanism is simplistic and the effect is unsatisfactory: Existing technologies (such as CN213564492U) mainly rely on physical heating (such as heating blocks) to thermoplastic soften the cracked area, and then achieve adhesion through mechanical extrusion. This simple physical thermal bonding method often has insufficient bonding strength and limited adhesion to the tire rubber matrix, making it difficult to form a durable and reliable repair layer, and it is easy to crack again in subsequent use. It is also prone to secondary damage: If the temperature is not properly controlled or the heating time is too long during the physical heating process, it is very easy to cause excessive thermal aging or thermal damage to the tire rubber matrix. Summary of the Invention

[0006] In order to overcome the above-mentioned defects of the prior art, the present invention provides a tire puncture injection backfill repair device to solve the problems of poor physical thermoplastic bonding effect and easy secondary damage to tires such as thermal aging in the prior art.

[0007] The present invention provides the following technical solution: a tire puncture injection backfill repair device, including a frame, a positioning seat fixedly installed on the bottom wall of the frame, a puncture injection mechanism assembled on its top wall, two sets of lateral clamping mechanisms with mirror symmetry on the left and right sides of the frame, a linkage lifting mechanism assembled on the top wall behind the puncture injection mechanism, and an inner liner support mechanism assembled below the linkage lifting mechanism. The puncture and injection mechanism has a guide column that is vertically oriented and fixedly installed on the top wall of the frame. A composite injection part is movably sleeved inside the guide column. The left and right ends of the composite injection part are equipped with mirror-symmetrical linkage slide rods. The bottom end of the composite injection part extends axially to produce a puncture head that penetrates the guide column. The outer wall of the puncture head is integrally formed with a longitudinally arrayed transmission rack. When the puncture head moves down, it can drive the linkage lifting mechanism to move in the opposite direction. The linkage lifting mechanism includes a longitudinally arranged lifting guide rail, which is fixedly installed on the top wall of the frame and slidably connected to the rack connecting rod on the front side. The rack connecting rod and the puncture head are centrally symmetrically arranged. A reversing gear is provided at the center of symmetry. It is rotatably installed on the outer side of the bottom end of the guide column through a positioning bracket. The reversing gear meshes with the transmission rack and rack connecting rod on the front and rear sides, respectively. The bottom end of the rack and pinion is equipped with an inner lining support mechanism, which includes a lining groove. A central support column is fixedly connected below the lining groove, and tension rods are symmetrically arranged on the left and right sides. The bottom end of the tension rod is rigidly connected to the rack and pinion, and the top end is rigidly connected to the lining groove through a telescopic end.

[0008] Furthermore, the axial length of the inner cavity of the guide post is at least sufficient to meet the puncture requirements of the puncture head on the tire tread; that is, when the liner groove is tightly fitted to the inner wall of the tread, the bottom end of the puncture head passes through the wound and is inserted into the inner side of the tread and placed in the liner groove.

[0009] Furthermore, the composite injection unit includes a double-lumen tube, which has an upper and lower separated air exchange chamber and a liquid chamber inside. A pneumatic push rod is axially installed through the top of the tube and extends into the air exchange chamber. A plunger that is linked to the extension and retraction end of the pneumatic push rod is sealed in the liquid chamber. When the pneumatic push rod retracts, it drives the plunger to move upward to the top of the liquid chamber. A puncture head is rigidly connected to the bottom of the double-lumen tube and is coaxially arranged therewith. One-way valves for liquid inlet / outlet are respectively installed on the bottom side wall of the double-lumen tube and inside the puncture head.

[0010] Furthermore, the left and right side walls of the guide column are symmetrically provided with upper sliding grooves, and the front and rear side walls of the guide column are provided with lower sliding grooves, that is, the upper and lower sliding grooves are staggered; the one-way valve here is connected to the sealed container storing the repair agent through a hose.

[0011] Furthermore, both the puncture head and the inner wall of the liner groove are coated with PTFE.

[0012] Furthermore, a heating inner liner is provided inside the liquid chamber of the dual-lumen tube, and the outer diameter of the plunger is adapted to the inner diameter of the heating inner liner.

[0013] Furthermore, the bottom wall of the puncture head is a closed sloping structure, and the internal hollow cavity and the glue injection hole opened on the bottom side wall form a fluid channel.

[0014] Furthermore, a limit drive device is installed on the rear side of the bottom end of the lifting guide rail, which includes a limit pawl and its horizontal adjustment drive mechanism.

[0015] Furthermore, a through groove is formed on the lower half of the rack connecting rod surface. When the puncture head is gradually pulled out from the inside of the tire tread and attempts to reset the pad groove, the limiting claw is driven to form a mechanical limit. After passing through the through groove of the rack connecting rod, this structure abuts against the bottom of the central support, thereby providing support for the pad groove. This allows the tensioning rod to be stretched as the rack connecting rod moves down, while the pad groove can still maintain its posture of being attached to the inner wall of the tire tread.

[0016] Furthermore, the outer end of the composite injection section is connected to the lateral clamping mechanism via a transmission connection. This assembly consists of a take-up plate, a connecting arm, and a clamping block rigidly connected from top to bottom. The bottom end of the take-up plate is guided by a slide rail on the frame surface. Its surface is provided with an obliquely penetrating guide groove. The guide head, which is fixedly connected to the end of the linkage slide rod, can slide in the oblique guide groove. The bottom end of the connecting arm extends to the side of the positioning seat and is fixed to the clamping block. When the linkage slide rod moves down, the guide head slides from top to bottom along the oblique guide groove, guiding the take-up plate to move inward along the slide rail on the top wall of the frame, so that the symmetrical lateral clamping mechanism converges towards the center under the traction of the take-up plate.

[0017] The technical effects and advantages of this invention are as follows: 1. This invention uses a main drive device to drive a linkage slide rod to move precisely downward along a guide column, simultaneously linking the composite injection unit and the puncture head to complete the puncture action; the guide head and the inclined guide groove cooperate to achieve automatic centering and clamping of the lateral clamping mechanism, so that the clamping block stably fits against both sides of the tire; the transmission mechanism of the transmission rack and reversing gear causes the inner liner support mechanism to move in the opposite direction, ensuring that the liner groove fits tightly against the inner wall of the tire tread; finally, it achieves the coordinated operation of puncture head positioning and clamping block clamping on both sides, the whole process requires no manual intervention, has high positioning accuracy and reliable mechanical linkage, significantly improving the automation level and operation efficiency of tire repair.

[0018] 2. This invention achieves precise quantitative injection of repair agent by driving a plunger with a pneumatic push rod, and the preheating function of the heated inner liner ensures optimal flowability of the vulcanized rubber repair paste; the modified PTFE / PFA coating of the puncture head and the liner groove effectively prevents material adhesion; the one-way valve structure ensures stable injection of repair agent into the tread wound; the mechanical limit formed by the driven limiting claw ensures that the liner groove remains attached when the puncture head is retracted; the linkage design of the rack and pinion and the reversing gear realizes the dynamic reset of the inner liner support mechanism. The entire system realizes an automated closed-loop operation of injection-limiting-needle retraction, significantly improving repair quality and efficiency. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the overall structure of the present invention.

[0020] Figure 2 This is a schematic diagram of the overall structure during the tire placement stage of the present invention.

[0021] Figure 3 For the present invention Figure 2 A further anatomical diagram of the structure.

[0022] Figure 4 For the present invention Figure 3 Schematic diagram of the connection structure between the central puncture and glue injection mechanism and the lateral clamping mechanism.

[0023] Figure 5 For the present invention Figure 4 Schematic diagram of the puncture and glue injection mechanism.

[0024] Figure 6 For the present invention Figure 5 A further anatomical diagram of the puncture and glue injection mechanism.

[0025] Figure 7 For the present invention Figure 6 Schematic diagram of the structure at point A in the middle.

[0026] Figure 8 For the present invention Figure 4 Schematic diagram of the middle lateral clamping mechanism.

[0027] Figure 9 For the present invention Figure 3 Schematic diagram of the connection structure of the puncture and glue injection mechanism, the linkage lifting mechanism, and the inner lining support mechanism.

[0028] Figure 10 This is a schematic diagram of the overall structure during the puncture and positioning stage of the present invention.

[0029] Figure 11 For the present invention Figure 10 A further anatomical diagram of the structure.

[0030] Figure 12 For the present invention Figure 11 Schematic diagram of the structure at point B.

[0031] Figure 13 This is a schematic diagram of the overall structure during the shaping and limiting stage of the present invention.

[0032] The attached figures are labeled as follows: 1. Frame; 2. Positioning seat; 3. Puncture and injection mechanism; 31. Guide column; 32. Composite injection section; 321. Dual-lumen tube; 322. Plunger; 323. Pneumatic push rod; 324. One-way valve; 325. Heated inner liner; 33. Linkage slide rod; 331. Guide head; 34. Puncture head; 341. Injection hole; 342. Transmission rack; 4. Lateral clamping mechanism; 41. Retracting plate; 411. Angled guide groove; 42. Connecting arm; 43. Clamping block; 44. Stabilizer. 441. Connecting bracket; 442. Roller; 5. Linkage lifting mechanism; 51. Lifting guide rail; 52. Rack and pinion; 53. Reversing gear; 54. Positioning bracket; 55. Limit drive device; 551. Limit pawl; 552. Lead screw nut; 553. Transmission lead screw; 554. Bearing seat; 555. Motor; 6. Inner lining support mechanism; 61. Liner groove; 62. Tensioning link; 63. Central support column; 7. Main drive device; 71. Linear actuator; 72. Linkage beam. Detailed Implementation

[0033] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings. In addition, the forms of the various structures described in the following embodiments are merely illustrative. The tire puncture injection backfill repair device involved in the present invention is not limited to the structures described in the following embodiments. All other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0034] Reference Figures 1-3 This invention provides a tire puncture injection backfill repair device, including a frame 1. A positioning seat 2 is fixedly installed on the bottom wall of the frame 1 for stably placing the tire, and a puncture injection mechanism 3 is assembled on its top wall. Two sets of lateral clamping mechanisms 4 are provided on the left and right sides of the frame 1 in a mirror symmetrical manner. A linkage lifting mechanism 5 is assembled on the top wall behind the puncture injection mechanism 3, and an inner liner support mechanism 6 is assembled below the linkage lifting mechanism 5. The positioning seat 2, the puncture injection mechanism 3, the lateral clamping mechanism 4 and the inner liner support mechanism 6 are located in the same left and right longitudinal plane.

[0035] In this embodiment, it should be noted that the top of the positioning seat 2 has a groove for placing the tire. When the tire is placed on the positioning seat 2 (tire placement stage), the puncture is facing upwards. The inner liner support mechanism 6 is located in the center hole of the wheel hub, and its axis is coplanar with the tire tread. The puncture and glue injection mechanism 3 is suspended above the tire tread and maintains a safe distance from the tire tread. The lateral clamping mechanism 4 is symmetrically distributed on the left and right sides of the tire tread. The puncture and glue injection mechanism 3, the inner liner support mechanism 6, and the lateral clamping mechanism 4 are all in no contact with the tire tread and maintain a preset working distance. Through the coordinated operation of the puncture and glue injection mechanism 3, the lateral clamping mechanism 4, the linkage lifting mechanism 5 and the inner lining support mechanism 6, the integrated operation of puncture positioning, limiting clamping and glue injection repair is completed. The front and rear sides of the top wall of the frame 1 are provided with mirror-symmetrical main drive devices 7, which provide driving force for the lifting and lowering of the linkage slide rod 33 and the composite injection part 32, and trigger the linkage and linkage between the linkage slide rod 33, the lateral clamping mechanism 4, the linkage lifting mechanism 5 and the inner liner support mechanism 6. The main drive device 7 consists of a linear actuator 71 and a linkage beam 72. The linear actuator 71 is fixedly installed on the top wall of the frame 1, and its top telescopic end is rigidly connected to the linkage beam 72. The left and right ends of the linkage beam 72 are respectively fixedly connected to the two linkage slide rods 33 in the puncture and injection mechanism 3. The main drive device 7 can use other equivalent drive devices to realize the lifting and traction function of the linkage slide rod 33, as long as the linkage accuracy and load requirements with the linkage slide rod 33 are met, the same technical effect can be achieved. In this article, all our discussions of positional relationships, including front-back, left-right, and right-side relationships, are based on... Figures 1-3 Defined from the perspective presented, these directional descriptions do not have actual geographical or physical meaning. They are merely a reference framework set up to help readers understand the content of the text more intuitively. In this way, we can more clearly show the relative positional relationship between the various parts, making the entire argument process easier to understand and follow. Please note that these custom directional markers are only for use within this article and do not represent any absolute direction or position in the real world.

[0036] Reference Figures 3-9 , Figures 10-12 and Figure 13The top wall of the frame 1 is provided with a puncture and injection mechanism 3. The puncture and injection mechanism 3 includes a guide column 31, a composite injection part 32, a linkage slide rod 33, and a puncture head 34. The guide column 31 is vertical and fixedly installed on the top wall of the frame 1. The composite injection part 32 is movably sleeved inside the guide column 31. The left and right ends of the composite injection part 32 are equipped with mirror-symmetrical linkage slide rods 33. The bottom end of the composite injection part 32 extends axially to the puncture head 34 that penetrates the guide column 31. The axial length of the inner cavity of the guide column 31 is at least sufficient to meet the puncture requirements of the puncture head 34 on the tire tread. That is, when the pad groove 61 is tightly attached to the inner wall of the tire tread, the bottom end of the puncture head 34 passes through the wound and inserts into the inner side of the tire tread and is placed in the pad groove 61.

[0037] In this embodiment, it should be noted that the left and right sidewalls of the guide column 31 are symmetrically provided with upper sliding grooves to provide a vertical moving track for the linkage slide rod 33 with precise guidance, so as to ensure that the linkage slide rod 33 can achieve a smooth lifting and lowering action under the traction drive of the main drive device 7. The composite injection unit 32 includes a double-lumen tube 321, which has an upper and lower separated air exchange chamber and a liquid chamber inside. A pneumatic push rod 323 is axially installed through the top of the tube and extends into the air exchange chamber. A plunger 322 is sealed in the liquid chamber and is linked to the extension end of the pneumatic push rod 323. When the pneumatic push rod 323 retracts, it drives the plunger 322 to move upward to the top of the liquid chamber. A puncture head 34 is rigidly connected to the bottom of the double-lumen tube 321 and is coaxially arranged therewith. One-way valves 324 for liquid inlet / outlet are respectively installed on the bottom side wall of the double-lumen tube 321 and inside the puncture head 34. The guide column 31 has sliding grooves on its front and rear sidewalls, providing a vertically moving track for the one-way valve 324 installed on the bottom sidewall of the double-lumen tube 321; that is, the upper and lower grooves are staggered to avoid interference; the one-way valve 324 here is connected to the material supply source through a hose; the material supply source is a sealed container for storing repair agent, which can be vulcanized rubber repair paste; the vulcanized rubber repair paste undergoes molecular cross-linking with the tire rubber to form a reinforcing layer that is homogeneous with the tire body, achieving seamless integration with the original tire body and avoiding secondary cracking; after curing, it forms a dense elastomer that can withstand ≥300kPa high pressure inside the tire, completely sealing the pinholes / cracks in the airtight layer and preventing slow air leakage; The ventilation chamber sidewall of the dual-chamber tube 321 has a perforated structure, which allows the internal pressure to be dynamically balanced with the external environment through continuous air pressure exchange, thereby ensuring that the pneumatic push rod 323 can provide stable power output to the plunger 322 during operation. The liquid chamber of the dual-lumen tube 321 is equipped with a heated inner liner 325, which can preheat the repair agent in the liquid chamber. The outer diameter of the plunger 322 is matched with the inner diameter of the heated inner liner 325 to ensure that the contact interface between the two forms a reliable sealing fit. The bottom wall of the puncture head 34 is a closed inclined structure. Its sharp angle structure can efficiently puncture the tire. The internal hollow cavity and the injection hole 341 opened on the bottom side wall form a fluid channel. After the puncture and positioning are completed, pressure is applied to the liquid cavity to make the pre-stored repair agent in it discharge through the injection hole 341 and fully fill the pad groove 61 that is in close contact with the inner wall of the tire tread along the fluid channel to achieve self-sealing repair. This structure ensures the controllable release and uniform distribution of the repair agent under pressure through the synergistic effect of the inclined puncture surface and the directional flow channel. The outer wall of the puncture head 34 is integrally formed with a longitudinally arrayed transmission rack 342. When the puncture head 34 moves downward, it can drive the linkage lifting mechanism 5 to move in the opposite direction. The linkage lifting mechanism 5 includes a longitudinally arranged lifting guide rail 51, which is fixedly installed on the top wall of the frame 1 and slidably connected to the rack connecting rod 52 on its front side. The rack connecting rod 52 and the puncture head 34 are centrally symmetrically arranged, and a reversing gear 53 is provided at the center of symmetry. It is rotatably installed on the outer side of the bottom end of the guide column 31 through the positioning bracket 54. The front and rear sides respectively form a meshing transmission relationship with the transmission rack 342 and rack connecting rod 52; when the puncture head 34 performs axial displacement, the transmission rack 342 drives the reversing gear 53 to rotate through the meshing action, thereby driving the rack connecting rod 52 to move synchronously in the opposite direction. Finally, through the transmission of the rack connecting rod 52, the inner liner support mechanism 6 generates a vertical displacement, ensuring that the liner groove 61 is close to the predetermined position of the inner wall of the tire tread; this linkage mechanism realizes the efficient conversion of downward pressure into upward force through the forward and reverse meshing transmission of the gear and rack; The bottom end of the rack and pinion 52 is equipped with an inner lining support mechanism 6. The inner lining support mechanism 6 includes a padding groove 61 located in the processing area between the positioning seat 2 and the puncture and glue injection mechanism 3. The central support column 63 is fixedly connected to the lower center of the padding groove 61. Tensioning rods 62 are symmetrically arranged on the left and right sides and separated to the sides. The bottom end of the tensioning rod 62 is rigidly connected to the rack and pinion 52, and the top end is rigidly connected to the padding groove 61 through a telescopic end, so that the inner lining support mechanism 6 can move synchronously with the rack and pinion 52 as it rises and falls. A through groove is opened on the lower half of the rack connecting rod 52. When the puncture head 34 is gradually pulled out from the inside of the tread and tries to drive the pad groove 61 to reset, the limiting claw 551 is driven to form a mechanical limit. After passing through the through groove of the rack connecting rod 52, the structure abuts against the bottom of the central support 63, thereby providing support for the pad groove 61. The tensioning rod 62 is stretched as the rack connecting rod 52 moves down, while the pad groove 61 can still maintain its posture of being attached to the inner wall of the tread. A limit drive device 55 is installed on the rear side of the bottom end of the lifting guide rail 51, which includes a limit pawl 551 and a horizontal adjustment drive mechanism. The horizontal adjustment drive mechanism consists of a lead screw nut 552, a transmission lead screw 553, a bearing seat 554, and a motor 555. The bearing seat 554 is fixedly installed on the rear side wall of the lifting guide rail 51. The limit pawl 551 is fixedly connected to the lead screw nut 552. The lead screw nut 552 is threaded onto the surface of the transmission lead screw 553. The transmission lead screw 553 is rotatably supported in the bearing seat 554. One end of the transmission lead screw 553 is rigidly connected to the output shaft of the motor 555 via a coupling. The outer end of the composite injection section 32 is connected to the lateral clamping mechanism 4 via a transmission connection. This assembly consists of a take-up plate 41, a connecting arm 42, and a clamping block 43 rigidly connected from top to bottom. The bottom end of the take-up plate 41 is guided by a slide rail on the surface of the frame 1. Its surface is provided with an obliquely penetrating guide groove 411. The guide head 331, which is fixedly connected to the end of the linkage slide rod 33, can slide within the oblique guide groove 411. The bottom end of the connecting arm 42 extends to the side of the positioning seat 2 and is fixed to the clamping block 43. When the linkage slide rod 33... When moving downwards, the guide head 331 slides down the inclined guide groove 411 from top to bottom, and the guide plate 41 moves inward along the slide rail on the top wall of the frame 1, so that the symmetrical lateral clamping mechanism 4 converges towards the center under the traction of the plate 41, so that the clamping block 43 abuts against the left and right sides of the tire tread to support the tire; the bottom can be equipped with a stabilizer 44 consisting of a connecting bracket 441 and a roller 442 - the connecting bracket 441 is fixed to the bottom of the connecting arm 42, and the roller 442 slides along the surface of the frame 1 to achieve stable movement.

[0038] Working principle of this invention: First, place the tire to be repaired steadily on the positioning seat 2, with the wound facing upwards, such as... Figures 2-3 As shown; at this time, the inner liner support mechanism 6 is precisely inserted into the center hole of the wheel hub, and its axis is coplanar with the tire tread; the puncture and glue injection mechanism 3 is suspended above the tire tread, maintaining a safe distance from the tire tread; the lateral clamping mechanism 4 is symmetrically distributed on the left and right sides of the tire tread. All components, including the puncture and glue injection mechanism 3, the inner liner support mechanism 6, and the lateral clamping mechanism 4, are not in contact with the tire tread and maintain a preset working distance. This is the tire placement stage, i.e., the initial preparation state of the equipment. Next, the main drive unit 7 is activated, causing the linkage slide rod 33 and the composite injection unit 32 to descend as a whole. Specifically, the telescopic end of the linear actuator 71 drives the linkage slide rod 33 to move downward through the linkage beam 72. The linkage slide rod 33 moves along the upper sliding groove of the guide column 31, and drives the connected composite injection unit 32 and puncture head 34 to descend together, so that the puncture head 34 gradually approaches the tire tread. At the same time, because the guide head 331 at the end of the linkage slide rod 33 slides in cooperation with the inclined guide groove 411 on the surface of the take-up and release plate 41, when the linkage slide rod 33 moves downward, the guide head 331 slides from top to bottom along the inclined guide groove 411, guiding the take-up and release plate 41 to move inward along the slide rail on the top wall of the frame 1, so that the left and right symmetrical lateral clamping mechanisms 4. Under the traction of the take-up and release plate 41, the tire converges towards the center, causing the clamping block 43 to gradually approach the left and right sides of the tire. Furthermore, because the transmission rack 342 on the sidewall of the puncture head 34 is driven by the reversing gear 53 and the rack connecting rod 52, when the puncture head 34 moves downward, the transmission rack 342 drives the rack connecting rod 52 to move in the opposite direction via the reversing gear 53, causing the rack connecting rod 52 to drive the inner liner support mechanism 6 to move upward as a whole, bringing the liner groove 61 closer to the inner wall of the tire tread. Until the liner groove 61 is tightly fitted against the inner wall of the tire tread, the bottom end of the puncture head 34 passes through the wound and inserts into the inner side of the tire tread, placing it in the liner groove 61. Simultaneously, the clamping block 43 just abuts against the left and right sides of the tire tread to support the tire. This process is the puncture positioning stage, completing the equipment mode switch, such as... Figures 10-12 As shown; Subsequently, the pneumatic push rod 323 is activated, and its output end drives the plunger 322 to move downward, pressurizing the liquid chamber of the dual-chamber tube 321. The repair agent (vulcanized rubber repair paste) inside the chamber is ejected through the one-way valve 324 in the puncture head 34, overflows through the injection hole 341, and is injected into the pad groove 61 that is close to the inner wall of the tire tread. After the quantitative injection is completed, the pneumatic push rod 323 drives the plunger 322 to lift, the liquid chamber expands to form a negative pressure, and the material source replenishes the quantitative repair agent in time for use. It should be emphasized that the heating liner 325 can preheat the repair agent in the liquid chamber. The inner walls of the puncture head 34 and the pad groove 61 are both coated with modified PTFE (containing wear-resistant filler) or PFA coating, which has excellent anti-stick properties. The one-way valve 324 is respectively located at the bottom of the liquid chamber of the guide column 31 and inside the puncture head 34 to ensure one-way flow of the repair agent and complete the injection filling of the inner area of ​​the tire puncture. Finally, the limit drive device 55 is activated to limit the inner liner support mechanism 6. Specifically, the motor 555 drives the transmission screw 553 to rotate forward / reverse through the coupling, allowing the screw nut 552 to move horizontally back and forth. When the screw nut 552 drives the limit pawl 551 to move horizontally forward, it passes through the through groove of the rack connecting rod 52 and abuts against the bottom of the central support 63, thus supporting the liner groove 61. Subsequently, the main drive device 7 is activated to drive the linkage slide rod 33 and the composite injection part 32 to move upward as a whole, performing a reverse action: causing the puncture head 34 to gradually pull out the liner groove 61 on the inner side of the tire tread, the clamping block 43 to expand to both sides, and at the same time, the rack connecting rod 52 moves downward and resets through the reversing gear 53. However, due to the interception effect of the limit pawl 551, the adaptability of the tension connecting rod 62 is stretched as the rack connecting rod 52 moves downward, while the liner groove 61 can still maintain its posture of being attached to the inner wall of the tire tread. Figure 13 As shown; After the repair agent in the pad groove 61 has completely cooled and adhered to the tread, the limiting claw 551 is removed from the bottom of the central support 63, and the pad groove 61 immediately loses its support and can fall back into place; the repair personnel can then polish the repair point, thus completing the tread repair.

[0039] The above is merely a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, in accordance with the technical plan and its improved concept, should be included under the protection of the present invention.

Claims

1. A tire puncture injection backfill repair device, comprising a frame (1), a positioning seat (2) fixedly installed on the bottom wall of the frame (1), and a puncture injection mechanism (3) assembled on its top wall, characterized in that: The frame (1) has two sets of mirror-symmetrical lateral clamping mechanisms (4) on its left and right sides. Its top wall is equipped with a linkage lifting mechanism (5) behind the piercing and glue injection mechanism (3). The inner lining support mechanism (6) is assembled below the linkage lifting mechanism (5). The puncture and injection mechanism (3) has a guide column (31) that is vertically oriented and fixedly installed on the top wall of the frame (1). A composite injection part (32) is movably sleeved inside the guide column (31). The left and right ends of the composite injection part (32) are equipped with mirror-symmetrical linkage slide rods (33). The bottom end of the composite injection part (32) extends axially to a puncture head (34) that penetrates the guide column (31). The outer wall of the puncture head (34) is integrally formed with a longitudinally arrayed transmission rack (342). When the puncture head (34) moves down, it can drive the linkage lifting mechanism (5) to move in the opposite direction. The linkage lifting mechanism (5) includes a longitudinally arranged lifting guide rail (51). The lifting guide rail (51) is fixedly installed on the top wall of the frame (1) and the rack connecting rod (52) is slidably connected to the front side. The rack connecting rod (52) and the puncture head (34) are centrally symmetrically arranged. A reversing gear (53) is provided at the center of symmetry. It is rotatably installed on the outer side of the bottom end of the guide column (31) through the positioning bracket (54). The reversing gear (53) meshes with the transmission rack (342) and the rack connecting rod (52) on the front and rear sides respectively. The bottom end of the rack and pinion (52) is equipped with an inner lining support mechanism (6), which includes a padding groove (61). A central support column (63) is fixedly connected below the padding groove (61), and tension rods (62) are symmetrically arranged on the left and right sides. The bottom end of the tension rod (62) is rigidly connected to the rack and pinion (52), and the top end is rigidly connected to the padding groove (61) through a telescopic end.

2. The tire puncture injection backfill repair device according to claim 1, characterized in that: The axial length of the inner cavity of the guide post (31) is at least sufficient to meet the puncture requirements of the puncture head (34) on the tire tread; that is, when the pad groove (61) is tightly attached to the inner wall of the tread, the bottom end of the puncture head (34) passes through the wound and is inserted into the inner side of the tread and placed in the pad groove (61).

3. The tire puncture injection backfill repair device according to claim 2, characterized in that: The composite injection unit (32) includes a double-lumen tube (321). The double-lumen tube (321) is provided with an upper and lower separated air exchange chamber and a liquid chamber. A pneumatic push rod (323) is axially installed through the top of the tube and extends into the air exchange chamber. A plunger (322) is sealed in the liquid chamber and is linked to the extension end of the pneumatic push rod (323). When the pneumatic push rod (323) retracts, it drives the plunger (322) to move up to the top of the liquid chamber. A puncture head (34) is rigidly connected to the bottom of the double-lumen tube (321) and is coaxially arranged with it. One-way valves (324) for liquid inlet / outlet are respectively installed on the bottom side wall of the double-lumen tube (321) and the puncture head (34).

4. The tire puncture injection backfill repair device according to claim 3, characterized in that: The guide column (31) has symmetrical upper sliding grooves on its left and right side walls, and lower sliding grooves on its front and rear side walls, i.e., the upper and lower sliding grooves are staggered; the one-way valve (324) here is connected to the sealed container storing the repair agent through a hose.

5. The tire puncture injection backfill repair device according to claim 4, characterized in that: Both the puncture head (34) and the inner wall of the liner groove (61) are coated with PTFE.

6. The tire puncture injection backfill repair device according to claim 5, characterized in that: The liquid chamber of the dual-lumen tube (321) is provided with a heating inner liner (325), and the outer diameter of the plunger (322) is adapted to the inner diameter of the heating inner liner (325).

7. The tire puncture injection backfill repair device according to claim 6, characterized in that: The bottom wall of the puncture head (34) is a closed inclined structure, and the internal hollow cavity and the glue injection hole (341) opened on the bottom side wall form a fluid channel.

8. The tire puncture injection backfill repair device according to claim 1, characterized in that: The lifting guide rail (51) is equipped with a limit drive device (55) at the rear bottom, which includes a limit pawl (551) and its horizontal adjustment drive mechanism.

9. The tire puncture injection backfill repair device according to claim 8, characterized in that: The lower half of the rack connecting rod (52) has a through groove. When the puncture head (34) is gradually pulled out from the inside of the tread and tries to drive the pad groove (61) to reset, the limiting claw (551) is driven to form a mechanical limit. After passing through the through groove of the rack connecting rod (52), the structure abuts against the bottom of the central support (63), thereby providing support for the pad groove (61). The tensioning rod (62) is stretched as the rack connecting rod (52) moves down, while the pad groove (61) can still maintain its posture attached to the inner wall of the tread.

10. The tire puncture injection backfill repair device according to claim 1 or 9, characterized in that: The outer end of the composite injection part (32) is connected to the lateral clamping mechanism (4) for transmission. The assembly consists of a take-up plate (41), a connecting arm (42), and a clamping block (43) rigidly connected from top to bottom. The bottom end of the take-up plate (41) is guided by the slide rail on the surface of the frame (1). The surface of the take-up plate (41) is provided with an oblique guide groove (411) that runs through it. The guide head (331) fixedly connected to the end of the linkage slide rod (33) can slide in the oblique guide groove (411). The bottom end of the connecting arm (42) extends to the side of the positioning seat (2) and is fixed to the clamping block (43). When the linkage slide rod (33) moves down, the guide head (331) slides from top to bottom along the oblique guide groove (411), guiding the take-up plate (41) to move inward along the slide rail on the top wall of the frame (1), so that the left and right symmetrical lateral clamping mechanism (4) converges towards the center under the traction of the take-up plate (41).

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