Extruding and trimming device for small lorry tire production

Abstract

The invention discloses an extrusion edge cutting device for small-sized lorry tire production, and relates to the technical field of automobile tire edge cutting, in particular to an extrusion edge cutting device for small-sized lorry tire production, which comprises a tire body and a grinding disc body, a rubber gasket for increasing the friction force with the contact surface of the tire body is fixedly mounted on the outer side of the reinforcing plate. Through cooperation of the tire body, the grinding disc body, the reinforcing plate, the first electric push rod and the adjusting assembly, the effect of adjusting the lifting movement of the reinforcing plate in the vertical direction is achieved through telescopic movement of an output shaft in the first electric push rod, and the effect of adjusting the movement of the reinforcing plate in the horizontal direction is achieved through movement of the adjusting assembly; and the transverse reinforcing plates and the vertical reinforcing plates can be adjusted according to the actual size of the tire body, so that the stability of the tire body in the deburring machining process is reinforced.

Description

Technical Field

[0001] The invention relates to the technical field of automobile tire edge trimming, in particular to an extrusion edge trimming device for producing small truck tires. Background Art

[0002] Tires are circular, elastic rubber products that roll against the ground and are installed on various vehicles and machinery. Typically mounted on metal rims, they support the vehicle's body, cushion external impacts, maintain contact with the road, and ensure vehicle performance. After being molded and released, tires will have burrs on their surface. To maintain tire quality after production, they must be deburred.

[0003] However, in order to reduce the workload of the staff who use manual burr removal, a new type of solid tire trimming equipment with the existing publication number CN219054465U is available. The equipment places the tire vertically inside the through-hole and on two rotating support rollers. The rotating ball is rotated to adjust the use angle of the cutter. By starting the rodless cylinder, the horizontal position of the cutter is changed. The drive motor is started, and the drive motor drives the rotating support roller to rotate, thereby driving the solid tire to rotate, thereby facilitating the processing of the burrs of the solid tire on both sides at the same time, thereby increasing the convenience and efficiency of the processing.

[0004] From the above disclosed technical content, theoretically speaking, the implementation of the relevant technical structure is conducive to cleaning the burrs on the tire surface. However, according to the description in the above disclosed technical content, before removing the burrs from the tire, the tire needs to be placed inside the through-hole so that the tire remains upright. Since different types of cars require tires of different sizes, when the size of the tire is larger than the inner diameter of the through-hole, the tire cannot be placed inside the through-hole, making it impossible to fix the tire during the deburring process. When the size of the tire is smaller than the inner diameter of the through-hole, although the tire can be placed inside the through-hole, there is a certain gap between the two sides of the tire and the inner side of the through-hole. When the gap is too large, the tire cannot be placed vertically inside the through-hole, which brings inconvenience to the deburring process of the tire. Summary of the Invention

[0005] In response to the shortcomings of the existing technology, the present invention provides an extrusion trimming device for the production of small heavy-duty truck tires, which has the advantages of strengthening the stability of the tire during burr removal, improving the effect of removing burrs on the tire surface, and facilitating the cleaning of burrs on the arc surface and end face of the tire, thereby solving the problems raised in the above-mentioned background technology.

[0006] The present invention provides the following technical solution: an extrusion trimming device for producing small heavy-duty truck tires, comprising a tire body and a grinding disc body, wherein reinforcement plates are installed on the upper and lower sides of the interior of the tire body, and a rubber gasket for increasing the friction between the contact surface and the tire body is fixedly installed on the outer side of the reinforcement plate, and a first electric push rod is fixedly connected to the inner side of the reinforcement plate, and a mounting plate is fixedly installed on the end of the first electric push rod away from the reinforcement plate, and a telescopic rod is fixedly connected to the inner side of the mounting plate, and a sleeve rod is movably sleeved on the outer wall of the telescopic rod away from the end of the mounting plate, and an adjustment component for controlling the horizontal movement of the reinforcement plate is provided on the inner wall of the telescopic rod, and a processing bin located outside the grinding disc body is provided on the outer side of the tire body, and a moving component is installed on the upper end of the grinding disc body.

[0007] Preferably, a limiting ring is fixedly sleeved on the outer wall of the sleeve rod, a roller is rollingly connected to the inner wall of the sleeve rod, and an end of the roller away from the sleeve rod is fixedly connected to the outer wall of the telescopic rod.

[0008] Preferably, a turntable is fixedly sleeved on the outer wall of the limiting ring, and a support frame is fixedly installed on the inner wall of the turntable.

[0009] Preferably, the adjustment assembly includes a first ball nut and a first ball screw, the inner wall of the first ball nut is threadedly connected to the outer wall of the first ball screw, the outer wall of the first ball nut is fixedly connected to the inner wall of the telescopic rod, the left end of the first ball screw is fixedly installed with a servo motor located on the inside of the sleeve rod, and a No. 1 reducer is provided on the output shaft of the servo motor, the outside of the servo motor is fixedly installed with a first chassis, and the outer side of the first chassis is fixedly connected to the inner side of the sleeve rod.

[0010] Preferably, the movable assembly includes a second ball nut and a second ball screw, the inner wall of the second ball nut is threadedly connected to the outer wall of the second ball screw, the lower end of the second ball nut is fixedly installed with a vertical rod, and the end of the vertical rod away from the second ball nut is fixedly connected to a protective cover located above the grinding disc body.

[0011] Preferably, the inner wall of the second ball screw is fixedly sleeved with a rotating shaft, the right end of the rotating shaft is fixedly mounted with a driving motor, and a second reducer is provided on the output shaft of the driving motor, the outer wall of the driving motor is fixedly sleeved with a second chassis, the left end of the second chassis is fixedly mounted with a cross bar located outside the moving component, and the inner walls of the left and right ends of the cross bar are movably sleeved with the outer walls of the left and right ends of the rotating shaft, a reinforcement rod is fixedly mounted on the lower end of the second chassis, and the end of the reinforcement rod away from the second chassis is fixedly connected to a base.

[0012] Preferably, a connecting rod is fixedly installed on the upper end surface of the grinding disc body, and the end of the connecting rod away from the grinding disc body is fixedly connected to the first rotating motor, and the lower end of the first rotating motor is fixedly connected to the bottom surface of the inner wall of the protective cover, and the inner wall of the lower end of the protective cover is movably connected to the outer wall of the connecting rod.

[0013] Preferably, the lower end surface of the turntable is fixedly mounted with a second electric push rod located below the tire body, the lower end of the second electric push rod is fixedly mounted with an I-shaped rod, the end of the I-shaped rod away from the second electric push rod is fixedly connected to a second rotating motor, and a No. 3 reducer is provided on the output shaft of the second rotating motor, the outside of the second rotating motor is fixedly mounted with a reinforcement frame located below the I-shaped rod, and the inner wall of the upper end of the reinforcement frame is movably connected to the outer wall of the lower end of the I-shaped rod, and the lower end of the reinforcement frame is connected to a base located inside the processing chamber by bolts.

[0014] Preferably, the outer wall of the I-shaped rod is rotatably connected to a ball, and the side of the ball away from the I-shaped rod is rotatably connected to a ring, the outer wall of the ring is evenly distributed with round rods, and the end of the round rod away from the ring is fixedly connected to the inner wall of the base.

[0015] Preferably, a bin seat is fixedly installed at the lower end of the processing bin, and the inner wall of the bin seat is fixedly connected to the outer wall of the base. The left and right sides of the front of the processing bin are respectively hinged with bin doors through hinges, and a visual window is fixedly installed on the front of the bin door.

[0016] Compared with the prior art, the present invention has the following beneficial effects: 1. The present invention realizes the adjustment of the vertical lifting movement of the reinforcement plate by the cooperation among the tire body, the grinding disc body, the reinforcement plate, the first electric push rod and the adjustment component, and utilizes the telescopic movement of the internal output shaft of the first electric push rod. The horizontal movement of the reinforcement plate is adjusted by utilizing the movement of the adjustment component, so that the horizontal reinforcement plates and the vertical reinforcement plates can be adjusted according to the actual size of the tire body, thereby strengthening the stability of the tire body during the deburring process.

[0017] 2. The present invention realizes the adjustment of the horizontal direction of the grinding disc body through the cooperation between the tire body, the grinding disc body, the moving assembly and the second electric push rod, and utilizes the setting of the moving assembly. The internal output shaft of the second electric push rod is telescopically movable. When the grinding disc body moves to the upper end of the tire body, the rotation of the grinding disc body can deburr the upper end surface of the tire body. When the grinding disc body moves to one side of the tire body, the rotation of the grinding disc body can deburr the side of the tire body, thereby improving the deburring of the tire body surface. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1It is a schematic diagram of the structure of the present invention; Figure 2 is a side view of the tire body of the present invention; Figure 3 It is a side view of the grinding disc body of the present invention; Figure 4 is a side view of the base of the present invention; Figure 5 A top view of the turntable of the present invention; Figure 6 is a side view of the second electric push rod of the present invention; Figure 7 A top view of the support frame of the present invention; Figure 8 is a cross-sectional view of the adjustment assembly of the present invention; Figure 9 is a cross-sectional view of the sleeve rod of the present invention; Figure 10 It is a side view of the moving assembly of the present invention.

[0019] In the figure: 1. Reinforcement plate; 2. Rubber gasket; 3. First electric push rod; 4. Mounting plate; 5. Telescopic rod; 6. Sleeve rod; 7. Adjustment assembly; 701. First ball nut; 702. First ball screw; 8. Grinding disc body; 9. Processing chamber; 10. Moving assembly; 101. Second ball nut; 102. Second ball screw; 11. Limiting ring; 12. Roller; 13. Turntable; 14. Support frame; 15. Servo motor; 16. A chassis; 17. Vertical rod; 18. Protective cover; 19. Drive motor; 20. Second chassis; 21. Crossbar; 22. Reinforcement rod; 23. Base; 24. Connecting rod; 25. First rotary motor; 26. Second electric push rod; 27. I-shaped rod; 28. Ball; 29. ​​Second rotary motor; 30. Reinforcement frame; 31. Ring; 32. Round rod; 33. Tire body; 34. Rotating shaft; 35. Warehouse door; 36. Visual window; 37. Warehouse seat. DETAILED DESCRIPTION

[0020] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0021] See also Figure 1 、 Figure 4 and Figure 8The tire body 33 is provided with a plurality of support plates 1, and the support plates 1 on the upper and lower sides are provided to support the top and bottom surfaces of the inner wall of the tire body 33. The support plates 1 on the left and right sides are provided to support the side surfaces of the inner wall of the tire body 33. The outer side of the reinforcement plate 1 is fixedly provided with a rubber gasket 2 for increasing the friction force of the contact surface with the tire body 33. The setting of the rubber gasket 2 increases the friction force of the contact surface between the tire body 33 and the reinforcement plate 1, and strengthens the stability of the tire body 33 during rotation. The inner side of the reinforcement plate 1 is fixedly connected with a first electric push rod 3, and the output shaft inside the first electric push rod 3 is used to move The treadmill 3 is a kind of treadmill that is fixed on the upper and lower sides of the tyre, and the treadmill 3 is a kind of treadmill that is fixed on the upper and lower sides of the tyre, and the treadmill 3 is a kind of treadmill that is fixed on the upper and lower sides of the tyre, and the treadmill 3 is a kind of treadmill that is fixed on the upper and lower sides of the tyre, and the treadmill 3 is a kind of treadmill that is fixed on the upper and lower sides of the tyre, and the treadmill 3 is a kind of treadmill that is fixed on the upper and lower sides of the tyre, and the treadmill 3 is a kind of treadmill that is fixed on the upper and lower sides of the tyre, and the treadmill 3 is a kind of treadmill that is fixed on the upper and lower sides of the tyre

[0022] The outer wall of the sleeve rod 6 is fixedly sleeved with a limit ring 11, and the inner wall of the sleeve rod 6 is rollingly connected to a roller 12, and the end of the roller 12 away from the sleeve rod 6 is fixedly connected to the outer wall of the telescopic rod 5. The rolling of the roller 12 on the inner wall of the sleeve rod 6 reinforces the stability of the telescopic movement of the telescopic rod 5 in the sleeve rod 6.

[0023] The outer wall of the limiting ring 11 is fixedly sleeved with a turntable 13 , and the rotation of the turntable 13 provides power for the rotation of the tire body 33 , facilitating the removal of surface burrs of the tire body 33 . The inner wall of the turntable 13 is fixedly mounted with a support frame 14 .

[0024] See also Figure 2 、 Figure 9 and Figure 10The adjusting component 7 includes a first ball nut 701 and a first ball screw 702. The inner wall of the first ball nut 701 is threadedly connected to the outer wall of the first ball screw 702. The threaded connection method enables the first ball screw 702 to rotate circumferentially while driving the horizontal movement of the first ball nut 701 to provide power. The outer wall of the first ball nut 701 is fixedly connected to the inner wall of the telescopic rod 5. The left end of the first ball screw 702 is fixedly mounted with a servo motor 15 located on the inner side of the sleeve rod 6, and a No. 1 reducer is provided on the output shaft of the servo motor 15. The setting of the No. 1 reducer serves to adjust the speed of the output shaft of the servo motor 15. The outside of the servo motor 15 is fixedly mounted with a first chassis 16, and the outer side of the first chassis 16 is fixedly connected to the inner side of the sleeve rod 6. The installation of the first chassis 16 provides a platform for the installation of the servo motor 15.

[0025] The moving assembly 10 includes a second ball nut 101 and a second ball screw 102. The inner wall of the second ball nut 101 is threadedly connected to the outer wall of the second ball screw 102. A vertical rod 17 is fixedly installed at the lower end of the second ball nut 101. The end of the vertical rod 17 away from the second ball nut 101 is fixedly connected to a protective cover 18 located above the grinding disc body 8. The second ball screw 102 rotates in a circular direction while driving the second ball nut 101 to move horizontally. When the second ball nut 101 moves, the protective cover 18 is driven to move in the same direction through the connection of the vertical rod 17. The movement of the protective cover 18 moves the grinding disc body 8 to the outer side of the tire body 33.

[0026] The inner wall of the second ball screw 102 is fixedly sleeved with a rotating shaft 34. The setting of the rotating shaft 34 serves to connect the second ball screw 102 with the drive motor 19. The drive motor 19 is fixedly installed on the right end of the rotating shaft 34, and a second reducer is provided on the output shaft of the drive motor 19. The outer wall of the drive motor 19 is fixedly sleeved with a second chassis 20. The left end of the second chassis 20 is fixedly installed with a cross bar 21 located outside the moving component 10, and the inner walls of the left and right ends of the cross bar 21 are movably sleeved with the outer walls of the left and right ends of the rotating shaft 34. A reinforcing rod 22 is fixedly installed on the lower end of the second chassis 20, and the end of the reinforcing rod 22 away from the second chassis 20 is fixedly connected to the base 23.

[0027] See also Figure 3 、 Figure 5 and Figure 7A connecting rod 24 is fixedly installed on the upper end surface of the grinding disc body 8, and a first rotary motor 25 is fixedly connected to the end of the connecting rod 24 away from the grinding disc body 8, and the lower end of the first rotary motor 25 is fixedly connected to the bottom surface of the inner wall of the protective cover 18. Turn on the power of the first rotary motor 25. After the first rotary motor 25 is turned on, the rotation of the grinding disc body 8 is driven by the connection of the connecting rod 24. The rotation of the grinding disc body 8 on the tire body 33 can remove the burrs on the surface of the grinding disc body 8, and the inner wall of the lower end of the protective cover 18 is movably connected to the outer wall of the connecting rod 24.

[0028] The lower end surface of the turntable 13 is fixedly mounted with a second electric push rod 26 located below the tire body 33. The telescopic movement of the output shaft on the inner wall of the second electric push rod 26 provides power for the vertical height adjustment of the tire body 33. The lower end of the second electric push rod 26 is fixedly mounted with an I-shaped rod 27. The end of the I-shaped rod 27 away from the second electric push rod 26 is fixedly connected to a second rotating motor 29, and a No. 3 reducer is provided on the output shaft of the second rotating motor 29. The outside of the second rotating motor 29 is fixedly mounted with a reinforcement frame 30 located below the I-shaped rod 27, and the inner wall of the upper end of the reinforcement frame 30 is movably connected to the outer wall of the lower end of the I-shaped rod 27. The lower end of the reinforcement frame 30 is connected to the base 23 located inside the processing chamber 9 by bolts.

[0029] See also Figure 6 and Figure 8 The outer wall of the I-shaped rod 27 is rotatably connected with a ball 28. The rolling of the ball 28 between the I-shaped rod 27 and the collar 31 not only strengthens the stability of the I-shaped rod 27 in the collar 31, but also reduces the friction of the I-shaped rod 27 during the rotation process in the collar 31. The side of the ball 28 away from the I-shaped rod 27 is rotatably connected with the collar 31. The outer wall of the collar 31 is evenly distributed with round rods 32, and the end of the round rod 32 away from the collar 31 is fixedly connected to the inner wall of the base 23. The round rod 32 serves to connect the collar 31 and the base 23.

[0030] A bin seat 37 is fixedly installed at the lower end of the processing bin 9, and the inner wall of the bin seat 37 is fixedly connected to the outer wall of the base 23. The left and right sides of the front of the processing bin 9 are respectively hinged with bin doors 35 through hinges, and a visual window 36 is fixedly installed on the front of the bin door 35.

[0031] Working principle: When in use, first, place the tire body 33 on the base 23, turn on the power of the four-directional servo motor 15, and after the servo motor 15 is turned on, it drives the rotation of the first ball screw 702. Due to the threaded connection between the first ball screw 702 and the first ball nut 701, the first ball screw 702 rotates in a circular direction while driving the horizontal movement of the first ball nut 701. The movement of the first ball nut 701 drives the telescopic rod 5 to move telescopically inside the sleeve rod 6. When the telescopic rod 5 moves, the reinforcement plate 1 moves toward the inside of the tire body 33 until the rubber gasket 2 contacts the side of the inner wall of the tire body 33, thereby increasing the rubber gasket 2 on the reinforcement plate 1. The friction force of the contact surface with the tire body 33, at this time, the movement of the telescopic rod 5 makes the roller 12 roll on the sleeve rod 6, reinforcing the stability of the telescopic movement of the telescopic rod 5, then, turn on the power of the first electric push rods 3 on the upper and lower sides, and use the telescopic movement of the output shaft inside the first electric push rod 3 to drive the reinforcement plate 1 to move toward the tire body 33 until the rubber gasket 2 contacts the top and bottom surfaces inside the tire body 33, then turn on the power of the drive motor 19, after the drive motor 19 is turned on, it drives the second ball screw 102 to rotate through the connection of the rotating shaft 34, due to the threaded connection between the second ball screw 102 and the second ball nut 101, the second ball screw 102 is circular. While rotating, it drives the second ball nut 101 to move in the horizontal direction. While the second ball nut 101 moves, it drives the protective cover 18 to move in the same direction through the connection of the vertical rod 17. The movement of the protective cover 18 moves the grinding disc body 8 to the outer side of the tire body 33. Then, the power of the first rotary motor 25 is turned on. After the first rotary motor 25 is turned on, it drives the rotation of the grinding disc body 8 through the connection of the connecting rod 24. The rotation of the grinding disc body 8 on the tire body 33 allows the burrs on the surface of the grinding disc body 8 to be removed. Finally, when it is necessary to deburr the side of the tire body 33, the power of the second electric push rod 26 is turned on, and the extension and contraction of the output shaft inside the second electric push rod 26 are utilized. Movement, the tire body 33 is driven to move in the vertical direction by the connection of the turntable 13, until the side edge of the tire body 33 is moved to the left side of the grinding disc body 8, the tire body 33 can be driven to rotate by turning on the second rotary motor 29, and the burrs on the side of the tire body 33 can be removed; when the upper end surface of the tire body 33 needs to be deburred, the tire body 33 is moved to the bottom of the grinding disc body 8, so that the bottom surface of the grinding disc body 8 faces the upper end surface of the tire body 33 for deburring; when the bottom surface of the tire body 33 needs to be deburred, the tire body 33 is moved to the upper end of the grinding disc body 8, and the upper end of the grinding disc body 8 faces the lower end surface of the tire body 33 for deburring.

[0032] It should be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "include," "comprise," or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article, or device that includes a series of elements includes not only those elements, but also other elements not explicitly listed, or elements inherent to such process, method, article, or device. At the same time, in the drawings of the present invention, fill patterns are only used to distinguish layers and do not make any other limitations.

[0033] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. An extrusion trimming device for producing small truck tires, comprising a tire body (33) and a grinding disc body (8), characterized in that: Reinforcement plates (1) are installed on both upper and lower sides of the tire body (33). A rubber gasket (2) for increasing the friction force of the contact surface with the tire body (33) is fixedly installed on the outer side of the reinforcement plate (1). A first electric push rod (3) is fixedly connected to the inner side of the reinforcement plate (1). A mounting plate (4) is fixedly installed on the end of the first electric push rod (3) away from the reinforcement plate (1). A telescopic rod (5) is fixedly connected to the inner side of the mounting plate (4). A sleeve rod (6) is movably sleeved on the outer wall of the end of the telescopic rod (5) away from the mounting plate (4). An adjustment component (7) for controlling the horizontal movement of the reinforcement plate (1) is provided on the inner wall of the telescopic rod (5). A processing chamber (9) located outside the grinding disc body (8) is provided on the outer side of the tire body (33). A moving component (10) is installed on the upper end of the grinding disc body (8).

2. The extrusion trimming device for producing small truck tires according to claim 1, characterized in that: The outer wall of the sleeve rod (6) is fixedly sleeved with a limiting ring (11), the inner wall of the sleeve rod (6) is rollingly connected to a roller (12), and the end of the roller (12) away from the sleeve rod (6) is fixedly connected to the outer wall of the telescopic rod (5).

3. The extrusion trimming device for producing small truck tires according to claim 2, characterized in that: A turntable (13) is fixedly sleeved on the outer wall of the limiting ring (11), and a support frame (14) is fixedly mounted on the inner wall of the turntable (13).

4. The extrusion trimming device for producing small truck tires according to claim 1, characterized in that: The adjustment assembly (7) includes a first ball nut (701) and a first ball screw (702), wherein the inner wall of the first ball nut (701) is threadedly sleeved with the outer wall of the first ball screw (702), and the outer wall of the first ball nut (701) is fixedly sleeved with the inner wall of the telescopic rod (5). The left end of the first ball screw (702) is fixedly mounted with a servo motor (15) located inside the sleeve rod (6), and a first reducer is provided on the output shaft of the servo motor (15). A first chassis (16) is fixedly mounted on the outside of the servo motor (15), and the outer side of the first chassis (16) is fixedly connected to the inner side of the sleeve rod (6).

5. The extrusion trimming device for producing small truck tires according to claim 1, characterized in that: The moving assembly (10) comprises a second ball nut (101) and a second ball screw (102), wherein the inner wall of the second ball nut (101) is threadedly sleeved with the outer wall of the second ball screw (102), a vertical rod (17) is fixedly mounted on the lower end of the second ball nut (101), and an end of the vertical rod (17) away from the second ball nut (101) is fixedly connected to a protective cover (18) located above the grinding disc body (8).

6. The extrusion trimming device for producing small truck tires according to claim 5, characterized in that: The inner wall of the second ball screw (102) is fixedly sleeved with a rotating shaft (34), the right end of the rotating shaft (34) is fixedly mounted with a driving motor (19), and a second reducer is provided on the output shaft of the driving motor (19), the outer wall of the driving motor (19) is fixedly sleeved with a second chassis (20), the left end of the second chassis (20) is fixedly mounted with a cross bar (21) located outside the moving component (10), and the inner walls of the left and right ends of the cross bar (21) are movably sleeved with the outer walls of the left and right ends of the rotating shaft (34), the lower end of the second chassis (20) is fixedly mounted with a reinforcing rod (22), and the end of the reinforcing rod (22) away from the second chassis (20) is fixedly connected to a base (23).

7. The extrusion trimming device for producing small truck tires according to claim 5, characterized in that: A connecting rod (24) is fixedly mounted on the upper end surface of the grinding disc body (8), and one end of the connecting rod (24) away from the grinding disc body (8) is fixedly connected to a first rotary motor (25), and the lower end of the first rotary motor (25) is fixedly connected to the bottom surface of the inner wall of the protective cover (18), and the inner wall of the lower end of the protective cover (18) is movably sleeved with the outer wall of the connecting rod (24).

8. The extrusion trimming device for producing small truck tires according to claim 3, characterized in that: A second electric push rod (26) located below the tire body (33) is fixedly mounted on the lower end surface of the turntable (13), an I-shaped rod (27) is fixedly mounted on the lower end of the second electric push rod (26), an end of the I-shaped rod (27) away from the second electric push rod (26) is fixedly connected to a second rotary motor (29), and a third speed reducer is provided on the output shaft of the second rotary motor (29), a reinforcement frame (30) located below the I-shaped rod (27) is fixedly mounted on the outside of the second rotary motor (29), and the inner wall of the upper end of the reinforcement frame (30) is movably connected to the outer wall of the lower end of the I-shaped rod (27), and the lower end of the reinforcement frame (30) is connected to the base (23) located inside the processing chamber (9) by bolts.

9. The extrusion trimming device for producing small truck tires according to claim 8, characterized in that: The outer wall of the I-shaped rod (27) is rotatably connected to a ball (28), and the side of the ball (28) away from the I-shaped rod (27) is rotatably connected to a collar (31). Round rods (32) are evenly distributed on the outer wall of the collar (31), and one end of the round rod (32) away from the collar (31) is fixedly connected to the inner wall of the base (23).

10. The extrusion trimming device for producing small truck tires according to claim 8, characterized in that: A bin seat (37) is fixedly mounted on the lower end of the processing bin (9), and the inner wall of the bin seat (37) is fixedly sleeved with the outer wall of the base (23). Bin doors (35) are hingedly mounted on the left and right sides of the front of the processing bin (9) through hinges, and a visual window (36) is fixedly mounted on the front of the bin door (35).

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