Tire expanding device for automobile maintenance and use method of tire expanding device

Abstract

The invention relates to the technical field of tire maintenance, in particular to an automobile maintenance tire expanding device and a using method thereof.The automobile maintenance tire expanding device comprises a [-shaped supporting plate, an air cylinder is fixed to the middle of the [-shaped supporting plate, and a bearing assembly is arranged at the output end of the air cylinder and comprises an extrusion plate rotationally connected with the output end of the air cylinder; supporting plates are fixed to the two ends of the U-shaped supporting plate, stand columns are clamped to the top faces of the supporting plates in a sliding mode, limiting blocks are fixed to the top ends of the stand columns, supporting bases are fixed to the top faces of the supporting plates, connecting shafts are rotationally connected to the tops of the supporting bases, and transmission wheels are fixed to one ends of the connecting shafts. The rollers can expand and move in the tire along the arc-shaped track in the tire, the two rollers synchronously expand and move to expand the rim of the tire, the air cylinder drives the extrusion plate to move upwards to abut against the outer side of the tire, and the inner bottom surface of the tire is exposed along with the upward movement of the extrusion plate; the tire expansion efficiency is improved while the tire is protected.

Description

Technical Field

[0001] This invention relates to the field of tire repair technology, specifically to a tire expansion device for automobile repair and its usage. Background Technology

[0002] After a period of use, or if tires experience leaks or low pressure, they need to be inspected. The main purpose of this inspection is to check for tire damage. During inspection, the tire removed from the vehicle needs to be widened, increasing the distance between the tire's bead sides to facilitate observation of the extent of damage to the tire's inner surface and to pinpoint the specific damaged area. Common tire widening tools use a screw or cylinder to rotate a clamping block positioned relative to the tire's bead, moving it away from the tire. Alternatively, two metal claws can be used to grip the tire's rim and rotate it away from the rim. While these methods can widen the tire, the shape of the clamping block or metal claws is not adapted to the elliptical arc shape of the tire's inner surface; they simply rotate or move linearly. This can easily damage the tire's rim, and while the clamping block or metal claws can expose the tire's inner surface, they don't adequately expose the side of the tire closest to the rim. Summary of the Invention

[0003] To overcome the aforementioned technical problems, the present invention aims to provide an automotive tire expansion device and its usage method. A motor drives two transmission wheels to rotate synchronously in opposite directions. These two transmission wheels, along with rollers at the ends of transmission rods, move along an elliptical trajectory, allowing the rollers to expand outwards along an arc-shaped path inside the tire. This synchronous outward expansion of the two rollers facilitates widening of the tire rim. A cylinder moves a pressing plate upwards to abut against the outer side of the tire. As the pressing plate moves upwards, the inner bottom surface of the tire is exposed, thus protecting the tire while improving the efficiency of tire expansion.

[0004] The objective of this invention can be achieved through the following technical solutions: A tire expander for automotive repair includes a C-shaped support plate. A cylinder is fixed in the middle of the C-shaped support plate. A support assembly is provided at the output end of the cylinder. The support assembly includes a pressing plate rotatably connected to the output end of the cylinder. C-shaped clamps are slidably connected to the interior of both ends of the pressing plate. A support plate is fixed to both ends of the C-shaped support plate. A column is slidably engaged on the top surface of the support plate. A limit block is fixed at the top of the column. A support seat is fixed to the top of the support seat. A connecting shaft is rotatably connected to the top of the support seat. A transmission wheel is fixed to one end of the connecting shaft. A transmission rod is rotatably sleeved on the outer side of the transmission wheel. A C-shaped frame is fixed to the end of the transmission rod opposite to the transmission wheel. A roller is rotatably connected inside the C-shaped frame. A support block is fixed to the bottom of the transmission rod. The support block slidably abuts against the top surface of the corresponding limit block.

[0005] Furthermore, the two ends of the C-shaped support plate are respectively fixed with a first fixed seat and a second fixed seat. A double-groove pulley is rotatably connected to the outer side of the first fixed seat, and a pulley is rotatably connected to the outer side of the second fixed seat. A transmission shaft that is rotatably connected to the C-shaped support plate is engaged with the outer side of the pulley. A second pulley is fixed to the outer side of the transmission shaft, and a belt is connected between the second pulley and the double-groove pulley.

[0006] Furthermore, a gear is fixed to the side of the pulley one near the fixed base two, a gear two that meshes with the gear one is fixed to one end of the transmission shaft, a pulley three is fixed to the outside of the connecting shaft, and the double-groove pulley and pulley one are respectively connected to the corresponding pulley three via belt drive.

[0007] Furthermore, the top surface of the tray is provided with a slot, the bottom surface of the column is rotatably connected with a limiting wheel that rolls and engages with the slot, and both sides of the support block are fixed with limiting springs between them and the column.

[0008] Furthermore, both ends of the limiting block are fixed with stop blocks, and one end of the transmission rod is detachably and movably connected to the position of the transmission wheel off-center.

[0009] Furthermore, a crossbeam is fixed to the outer side of the cylinder, and both ends of the crossbeam are fixedly connected to the inner side of the C-shaped support plate. A return spring is fixed to the bottom surface of each of the two C-shaped clamps, and a connecting frame is fixed between the two return springs. The connecting frame is rotatably connected to the output end of the cylinder.

[0010] Furthermore, a housing is fixed to one side of the C-shaped support plate, and a motor is fixed to the outside of the housing. The output end of the motor is fixedly connected to a connecting shaft at a corresponding position.

[0011] A method for using a tire expander for automotive repair, the method specifically includes the following steps: Step 1: The motor drives the two drive wheels to rotate. When the rollers at the ends of the two drive rods rotate to the maximum distance between them, the drive rods stop moving with the rollers, and the tire is placed vertically on the extrusion plate. Step 2: The output end of the cylinder moves the compression plate upwards and supports it at the bottom of the tire; Step 3: The drive wheel moves along an elliptical trajectory with the roller end of the drive rod. The arc-shaped part of the elliptical trajectory is easy to adapt to the arc shape of the inner side of the tire. The two oppositely arranged rollers move synchronously in the direction away from the rim to achieve the effect of rapid tire expansion. Step 4: The output end of the cylinder moves the extrusion plate upward again, and the extrusion plate moves from the outside of the tire to the inside of the tire, turning the inner bottom of the tire outward. Step 5: Slide the upright on one of the trays along the L-shaped slot, and rotate the upright so that one of the transmission rods drives the roller to rotate to one end of the tray; Step 6: Attach the rim on one side of the tire to the corresponding position inside a U-shaped clamp, and then flip the tire in the direction away from the U-shaped clamp; Step 7: The drive wheel continues to move with the drive rod that has not moved, so that the roller at one end of the drive rod can abut against the side of the wheel rim inside the tire that is away from the C-shaped clamp. Step 8: Flip the tire again toward the C-shaped clamp and press the tire down so that the rim of the tire near the C-shaped clamp is laid flat and exposed on the extrusion plate.

[0012] The beneficial effects of this invention are: 1. The motor drives the transmission wheel at its output end to rotate in the direction away from the tire (instruction manual attached). Figure 1 (In the clockwise direction), under the transmission action of the belt, double-groove pulley, pulley one, and pulley two, another transmission wheel rotates counterclockwise in the direction away from the tire. The position off-center on the transmission wheel is rotatably connected to the transmission rod. During the rotation of the transmission wheel, one end of the transmission rod can move back and forth a certain distance to the left and right and up and down a certain distance. The end of the transmission rod near the transmission wheel moves downward so that the other end of the transmission rod, with the support block as the base point, probes into the interior of the tire near the rim. The end of the transmission rod near the transmission wheel moves upward so that the other end of the transmission rod, with the support block as the base point, moves in the direction away from the tire. In turn, the roller at the end of the transmission rod moves the position of the tire rim in the direction away from the tire. Furthermore, the support block constantly slides back and forth on the top surface of the limiting block. In conjunction with the up-and-down and left-and-right reciprocating equidistant movements of one end of the transmission rod, the transmission rod causes the roller on the convex frame to move in an elliptical trajectory. The arc-shaped section of the elliptical trajectory facilitates movement to adapt to the arc-shaped shape of the inner side of the tire. At the same time, the roller itself can rotate during the traction of the rim, realizing the tire expansion work while protecting the rim. The two relatively arranged rollers move synchronously in the direction away from the rim to achieve a rapid tire expansion effect. Rotating the extrusion plate by 90 degrees causes the elliptical extrusion plate to be converted into a long straight state and arranged on the outer side of the bottom of the tire. The output end of the cylinder carries the extrusion plate upward, thereby flipping the inner bottom surface of the tire outward, which helps to improve the tire expansion effect.

[0013] 2. The column on one of the pallets first slides longitudinally along the L-shaped groove to separate the transmission rod from the transmission wheel. Then, the column slides laterally along the groove to the circular groove at the end of the groove. Next, the column is rotated to make one of the transmission rods rotate with the roller to one end of the pallet. The rim on one side of the tire is attached to the corresponding position of a C-shaped clamp. Then, the tire is flipped away from the C-shaped clamp, changing it from a flat to a vertical position. The drive wheel continues to move the drive rod that has not moved, so that the roller at one end of the drive rod abuts against the rim position on the side of the tire away from the C-shaped clamp. Then, the tire is flipped and moved again towards the C-shaped clamp, and the tire is pressed down so that the rim position on the side of the tire closest to the C-shaped clamp is laid flat and exposed on the extrusion plate. This fully exposes the side of the tire closest to the rim. By setting two C-shaped clamps, both drive rods can slide away from the top position of the extrusion plate through the column on the slot. This makes it easy to attach the rims on different sides of the tire to the C-shaped clamps as needed, thus exposing the rims on different sides of the tire onto the extrusion plate. Attached Figure Description

[0014] The invention will now be further described with reference to the accompanying drawings.

[0015] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2-3 These are schematic diagrams of the overall structure of the present invention from different perspectives; Figure 4 This is a schematic diagram of the cylinder and support assembly structure in this invention; Figure 5 This is a schematic diagram of the overall structure of the top of the tray in this invention; Figure 6 This is a schematic diagram of the tray and column structure in this invention; Figure 7 This is a schematic diagram of the transmission relationship between the support base, transmission wheel, double-groove pulley, pulley one, and pulley two in this invention; Figure 8 This is a schematic diagram of the moving state of the column and transmission rod in this invention.

[0016] In the diagram: 100, C-shaped support plate; 110, tray; 111, slot; 120, fixed seat one; 121, double-groove pulley; 130, fixed seat two; 131, pulley one; 140, drive shaft; 141, pulley two; 150, housing; 151, motor; 200, cylinder; 210, crossbeam; 300, support assembly; 310, extrusion plate; 320, C-shaped clamp; 330, return spring; 340, connecting frame; 400, column; 410, limit block; 420, limit wheel; 500, support seat; 510, connecting shaft; 511, drive wheel; 600, drive rod; 610, C-shaped frame; 611, roller; 620, support block; 621, limit spring. Implementation

[0017] The technical solutions of the present invention will be clearly and completely described below with reference to the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0018] Please see Figure 1-8 As shown, an automotive tire expansion device includes a C-shaped support plate 100, a cylinder 200 fixed in the middle of the C-shaped support plate 100, a support assembly 300 provided at the output end of the cylinder 200, the support assembly 300 including a pressing plate 310 rotatably connected to the output end of the cylinder 200, C-shaped clamping plates 320 slidably connected inside both ends of the pressing plate 310, a support plate 110 fixed at both ends of the C-shaped support plate 100, a column 400 slidably engaged on the top surface of the support plate 110, and a limit block fixed at the top of the column 400. 410, a support base 500 is fixed on the top surface of the support plate 110, a connecting shaft 510 is rotatably connected to the top of the support base 500, a transmission wheel 511 is fixed to one end of the connecting shaft 510, a transmission rod 600 is rotatably sleeved on the outer side of the transmission wheel 511, a chamfered frame 610 is fixed to the end of the transmission rod 600 away from the transmission wheel 511, a roller 611 is rotatably connected inside the chamfered frame 610, a support block 620 is fixed to the bottom of the transmission rod 600, and the support block 620 slides against the top surface of the corresponding position limiting block 410.

[0019] The two ends of the C-shaped support plate 100 are respectively fixed with a first fixing seat 120 and a second fixing seat 130. A double-grooved pulley 121 is rotatably connected to the outer side of the first fixing seat 120, and a pulley 131 is rotatably connected to the outer side of the second fixing seat 130. A transmission shaft 140, which is rotatably connected to the C-shaped support plate 100, is engaged with the outer side of the pulley 131. A second pulley 141 is fixed to the outer side of the transmission shaft 140. A belt is connected between the second pulley 141 and the double-grooved pulley 121. The transmission of the pulley 131, the second pulley 141, the third pulley, and the two belts is... The action causes the two transmission wheels 511 to rotate synchronously in opposite directions; a gear 1 is fixed on the side of pulley 131 near the fixed base 2 130, a gear 2 that meshes with gear 1 is fixed at one end of the transmission shaft 140, and a pulley 3 is fixed on the outside of the connecting shaft 510. The double groove pulley 121 and pulley 131 are respectively connected to the corresponding pulley 3 through belt drive. The meshing of gear 1 and gear 2 causes the rotation direction of pulley 2 141 to be opposite to the rotation direction of pulley 131, thereby enabling the two transmission wheels 511 to rotate synchronously in opposite directions.

[0020] The top surface of the support plate 110 has a slot 111. The bottom surface of the column 400 is rotatably connected to a limiting wheel 420 that rolls into the slot 111. Limiting springs 621 are fixed between both sides of the support block 620 and the column 400. The limiting wheel 420 facilitates the locking of the column 400 into the slot 111. The column 400 can only rotate when it moves to one end of the slot 111. The limiting spring 621 keeps the bottom surface of the support block 620 abutting the top surface of the limiting block 410, causing the movement trajectory of the transmission rod 600 to be elliptical. Both ends of the limiting block 410 are fixed with stops. One end of the transmission rod 600 is detachably and movablely connected to the transmission wheel 511 at a position off-center. The stops restrict the position of the support block 620, and one end of the transmission rod 600 can move along an elliptical trajectory as the transmission wheel 511 rotates. A crossbeam 21 is fixed to the outside of the cylinder 200. 0. Both ends of the crossbeam 210 are fixedly connected to the inner side of the C-shaped support plate 100. The bottom surfaces of the two C-shaped clamps 320 are fixed with return springs 330. A connecting frame 340 is fixed between the two return springs 330. The connecting frame 340 is rotatably connected to the output end of the cylinder 200. During the process of the extrusion plate 310 extruding the tire, the C-shaped clamps 320 are stored inside the extrusion plate 310, and the return springs 330 are in a compressed state. When the extrusion plate 310 leaves the tire, the C-shaped clamps 320 are moved up to the outside of the extrusion plate 310 under the elastic force of the return springs 330 to engage the wheel rim for later use. A housing 150 is fixed to one side of the C-shaped support plate 100. A motor 151 is fixed to the outside of the housing 150. The output end of the motor 151 is fixedly connected to the corresponding connecting shaft 510. The motor 151 facilitates the rotation of the drive wheel 511, enabling the device to automatically assist in tire expansion.

[0021] A method for using a tire expander for automotive repair, the method specifically includes the following steps: Step 1: The motor 151 drives the two transmission wheels 511 to rotate. When the rollers 611 at the ends of the two transmission rods 600 rotate to the maximum distance between them, the transmission rods 600 stop moving with the rollers 611 and the tire is placed vertically on the extrusion plate 310. Step 2: The output end of cylinder 200 moves upward with the extrusion plate 310 to support the bottom of the tire; Step 3: The transmission wheel 511 moves along an elliptical trajectory with the roller 611 end of the transmission rod 600. The arc-shaped part of the elliptical trajectory is easy to adapt to the arc shape of the inner side of the tire. The two relatively arranged rollers 611 move synchronously in the direction away from the rim to achieve the effect of rapid tire expansion. Step 4: The output end of cylinder 200 moves the extrusion plate 310 upward again. The extrusion plate 310 moves from the outside of the tire to the inside of the tire, turning the inner bottom of the tire outward. Step 5: Slide the column 400 on one of the trays 110 along the L-shaped slot 111, and rotate the column 400 so that one of the transmission rods 600 drives the roller 611 to one end of the tray 110. Step 6: Attach the rim on one side of the tire to the corresponding position inside a U-shaped clamp 320, and then flip the tire in the direction away from the U-shaped clamp 320; Step 7: The transmission wheel 511 continues to move the transmission rod 600, which has not moved, so that the roller 611 at one end of the transmission rod 600 can abut against the wheel rim position on the side of the tire that is away from the C-shaped clamp 320. Step 8: Flip the tire again toward the direction of the C-shaped clamp 320 and press the tire down so that the rim position on the side of the tire closest to the C-shaped clamp 320 can be laid flat and exposed on the extrusion plate 310.

[0022] Working principle: In use, when it is necessary to expose the inner bottom of the tire, the motor 151 drives the transmission wheel 511 at its output end to rotate. Under the transmission action of the belt, double groove pulley 121, pulley one 131, pulley two 141, and pulley three, the other transmission wheel 511 rotates synchronously in the opposite direction. When the rollers 611 at the ends of the two transmission rods 600 rotate to the maximum distance between them, the transmission rods 600 stop moving with the rollers 611, and the tire is placed vertically on the extrusion plate 310 (refer to the instruction manual). Figure 1At this point, the elliptical extrusion plate 310 can be rotated 90 degrees to convert it into a long straight state and placed on the outside of the tire bottom. This facilitates the later compression of the tire tread by the narrower extrusion plate. The output end of the cylinder 200 moves the extrusion plate 310 upwards and supports it at the bottom of the tire. Then, the transmission wheel 511 continues to move the roller 611 end of the transmission rod 600 in an elliptical trajectory. The arc-shaped part of the elliptical trajectory is convenient to adapt to the arc shape of the inner side of the tire. At the same time, the roller 611 can rotate itself during the traction of the rim, realizing the tire expansion work while protecting the rim. The two relatively arranged rollers 611 move synchronously in the direction away from the rim to achieve the effect of rapid tire expansion. At the same time, the output end of the cylinder 200 moves the extrusion plate 310 upwards again. The extrusion plate 310 moves from the outside of the tire to the inside of the tire, turning the inner bottom surface of the tire outwards to fully expose the inner bottom surface of the tire.

[0023] When it is necessary to expose the interior of the tire near the rim, slide the column 400 on one of the support plates 110 longitudinally along the L-shaped groove 111 to separate the drive rod 600 from the drive wheel 511. Then, slide the column 400 laterally along the groove 111 to the circular groove at the end of the groove 111. Rotate the column 400 to rotate one of the drive rods 600, which in turn rotates the roller 611 to one end of the support plate 110 (see attached diagram). Figure 8 The tire is then attached to the corresponding position of a U-shaped clamp 320, and then the tire is flipped away from the U-shaped clamp 320, so that the tire changes from a flat position to a vertical position. The transmission wheel 511 continues to move the transmission rod 600, which has not moved, so that the roller 611 at one end of the transmission rod 600 can abut against the rim position on the side of the tire away from the U-shaped clamp 320. Then the tire is flipped and moved again towards the U-shaped clamp 320, and the tire is pressed down so that the rim position on the side of the tire closest to the U-shaped clamp 320 can be laid flat and exposed on the extrusion plate 310, so that the side of the tire closest to the rim is fully exposed.

[0024] In the description of this specification, references to terms such as "an embodiment," "example," "specific example," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the invention. In this specification, illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0025] The above description is merely an example and illustration of the present invention. Those skilled in the art can make various modifications or additions to the specific embodiments described, or use similar methods to replace them, as long as they do not deviate from the invention or exceed the scope defined in the claims, all of which should fall within the protection scope of the present invention.

Claims

1. A tire expansion device for automobile repair, comprising a U-shaped support plate (100), characterized in that, A cylinder (200) is fixed in the middle of the C-shaped support plate (100). A support assembly (300) is provided at the output end of the cylinder (200). The support assembly (300) includes a pressing plate (310) rotatably connected to the output end of the cylinder (200). C-shaped clamps (320) are slidably connected to the inside of both ends of the pressing plate (310). A support plate (110) is fixed at both ends of the C-shaped support plate (100). A column (400) is slidably engaged on the top surface of the support plate (110). A limit block (410) is fixed at the top of the column (400). The top surface of the support plate (110) is... A support base (500) is fixed, and a connecting shaft (510) is rotatably connected to the top of the support base (500). A transmission wheel (511) is fixed to one end of the connecting shaft (510). A transmission rod (600) is rotatably sleeved on the outside of the transmission wheel (511). A U-shaped frame (610) is fixed to one end of the transmission rod (600) away from the transmission wheel (511). A roller (611) is rotatably connected inside the U-shaped frame (610). A support block (620) is fixed to the bottom of the transmission rod (600). The support block (620) slides against the top surface of the corresponding position limiting block (410).

2. The tire expansion device for automobile repair according to claim 1, characterized in that, The two ends of the C-shaped support plate (100) are respectively fixed with a first fixed seat (120) and a second fixed seat (130). A double-groove pulley (121) is rotatably connected to the outer side of the first fixed seat (120), and a pulley (131) is rotatably connected to the outer side of the second fixed seat (130). A transmission shaft (140) that is rotatably connected to the C-shaped support plate (100) is engaged with the outer side of the pulley (131). A second pulley (141) is fixed to the outer side of the transmission shaft (140), and a belt is connected between the second pulley (141) and the double-groove pulley (121).

3. The tire expansion device for automobile repair according to claim 2, characterized in that, A gear is fixed to the side of the pulley (131) near the fixed seat (130). A gear is fixed to one end of the transmission shaft (140) and meshes with the gear. A pulley is fixed to the outside of the connecting shaft (510). The double groove pulley (121) and the pulley (131) are respectively connected to the pulleys at corresponding positions via belt drives.

4. The tire expansion device for automobile repair according to claim 3, characterized in that, The top surface of the tray (110) is provided with a slot (111), and the bottom surface of the column (400) is rotatably connected with a limiting wheel (420) that rolls and engages with the slot (111). Limiting springs (621) are fixed between both sides of the support block (620) and the column (400).

5. A tire expansion device for automobile repair according to claim 4, characterized in that, Both ends of the limiting block (410) are fixed blocks, and one end of the transmission rod (600) is detachably and movably connected to the position of the transmission wheel (511) off-center.

6. A tire expansion device for automobile repair according to claim 5, characterized in that, A crossbeam (210) is fixed to the outside of the cylinder (200). Both ends of the crossbeam (210) are fixedly connected to the inside of the U-shaped support plate (100). A return spring (330) is fixed to the bottom surface of each of the two U-shaped clamps (320). A connecting frame (340) is fixed between the two return springs (330). The connecting frame (340) is rotatably connected to the output end of the cylinder (200).

7. A tire expansion device for automobile repair according to claim 6, characterized in that, A housing (150) is fixed to one side of the C-shaped support plate (100), and a motor (151) is fixed to the outside of the housing (150). The output end of the motor (151) is fixedly connected to the corresponding connecting shaft (510).

8. The method of using a tire expander for automobile repair according to claim 7, characterized in that, The method specifically includes the following steps: Step 1: The motor (151) drives the two transmission wheels (511) to rotate. When the rollers (611) at the ends of the two transmission rods (600) rotate to the maximum distance between them, the transmission rods (600) stop moving with the rollers (611) and the tire is placed vertically on the extrusion plate (310). Step 2: The output end of the cylinder (200) moves upward with the extrusion plate (310) to support the bottom of the tire; Step 3: The drive wheel (511) moves along an elliptical trajectory with the roller (611) end of the drive rod (600). The arc-shaped part of the elliptical trajectory is easy to adapt to the arc shape of the inner side of the tire. The two relatively arranged rollers (611) move synchronously in the direction away from the wheel rim to achieve the effect of rapid tire expansion. Step 4: The output end of the cylinder (200) moves the extrusion plate (310) upward again, and the extrusion plate (310) moves from the outside of the tire to the inside of the tire, turning the inner bottom surface of the tire outward. Step 5: Slide the column (400) on one of the trays (110) along the L-shaped slot (111), and rotate the column (400) so that one of the transmission rods (600) drives the roller (611) to rotate to one end of the tray (110); Step 6: Attach the rim on one side of the tire to the corresponding position of an incline clamp (320), and then flip the tire in the direction away from the incline clamp (320); Step 7: The drive wheel (511) continues to move with the drive rod (600) which has not moved, so that the roller (611) at one end of the drive rod (600) can abut against the wheel rim position on the side away from the scalloped plate (320) inside the tire. Step 8: Flip the tire again toward the C-shaped clamp (320) and press the tire down so that the rim position on the side of the tire closest to the C-shaped clamp (320) can be laid flat and exposed on the extrusion plate (310).

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