A joint sewing repair device for a tire blank

Abstract

The application provides a joint stitching repair device for a tire blank, and belongs to the technical field of rubber machinery. The device comprises a sidewall pressing roller assembly, a servo drive unit, a multi-piece pressing roller assembly and a first frame body. The sidewall pressing roller assembly, the servo drive unit and the multi-piece pressing roller assembly are all mounted on the first frame body. The sidewall pressing roller assembly and the multi-piece pressing roller assembly are fixed on the two sides of the first frame body, and the servo drive unit is fixed on the middle part of the first frame body. The multi-piece pressing roller assembly can stitch the PA composite joint of the tire blank, and the sidewall pressing roller assembly can press the sidewall edge of the tire blank to repair the PA composite joint and save the installation space of the overall device. The device can effectively improve the quality and production efficiency of the tire blank and reduce the safety risk.

Description

Technical Field

[0001] This invention relates to the field of rubber machinery technology, and in particular to a joint repair device for tire blanks. Background Technology

[0002] A joint sewing device is used to sew PA composite joints. Generally, a joint sewing device is equipped with multiple pressure rollers that roll along the tire carcass joint direction to sew the PA composite joint. However, when sewing PA composite joints in this way, the joint often gets crushed at the tire sidewall, affecting tire quality and even resulting in a scrap tire. Therefore, repairing PA composite joints that have been crushed by the pressure rollers is an important way to improve the quality of joint sewing. Summary of the Invention

[0003] In view of this, the purpose of the present invention is to provide a joint stitching and repair device for tire blanks, which can repair PA composite joints that have been crushed by multiple pressure rollers after stitching PA composite joints.

[0004] This embodiment provides a joint stitching repair device for tire blanks, including: a sidewall pressure roller assembly, a servo drive unit, a multi-piece pressure roller assembly, and a first frame. The sidewall pressure roller assembly, the servo drive unit, and the multi-piece pressure roller assembly are all mounted on the first frame. The sidewall pressure roller assembly and the multi-piece pressure roller assembly are respectively fixed on both sides of the first frame, and the servo drive unit is fixed in the middle of the first frame.

[0005] The tire sidewall pressure roller assembly includes a rubber roller, a guide unit, and a first cylinder. The first cylinder is fixed to the first frame by screws. The push rod of the first cylinder is fixedly connected to one end of the guide unit, and the other end of the guide unit is fixedly connected to the rubber roller.

[0006] The servo drive unit includes a servo motor, a reducer, and a gear. The servo motor is fixed to the first frame with screws. The output end of the servo motor is connected to the reducer, and the reducer is connected to the gear. The gear extends from the bottom surface of the first frame and meshes with the front guide rail rack on the front guide rail, thereby driving the joint sewing device to move laterally on the front guide rail.

[0007] The multi-plate pressure roller assembly includes a multi-plate pressure roller structure, a second cylinder, and a second frame. The second frame is fixedly installed on the first frame. The second cylinder and the multi-plate pressure roller structure are mounted on the second frame. The output end of the second cylinder is connected to the multi-plate pressure roller structure.

[0008] Furthermore, when the first cylinder extends, the rubber roller can contact the tire blank and apply pressure to the sidewall edge of the tire blank; when the first cylinder retracts, the rubber roller can leave the tire blank.

[0009] Furthermore, when the second cylinder extends, the multi-plate pressure roller structure can contact the PA composite joint of the tire blank; when the joint sewing device moves laterally, the multi-plate pressure roller structure can sew the PA composite joint; when the second cylinder retracts, the multi-plate pressure roller structure separates from the PA composite joint.

[0010] Furthermore, the front guide rail includes a base, two linear guide rails, and a front guide rail rack. The two linear guide rails are fixedly installed on both sides of the base by screws, and the front guide rail rack is fixedly installed in the middle of the base by screws. Each of the two linear guide rails is equipped with a slider. The joint sewing device is installed on the slider of the linear guide rail. The gear of the servo drive unit meshes with the front guide rail rack to achieve gear rotation, thereby enabling the joint sewing device to move on the front guide rail.

[0011] Furthermore, the forming drum is mounted on the front guide rail via a forming drum housing, and the forming drum housing contains a motor for driving the forming drum to rotate; the joint sewing device is located below the forming drum, and the joint sewing device can move on the front guide rail by means of a servo drive unit. The position of the joint sewing device relative to the forming drum can be changed, and the direction of movement of the joint sewing device is consistent with the axis of the forming drum.

[0012] Furthermore, the guide unit includes an H-shaped block, two optical shafts, and a mounting plate. The H-shaped block is fixedly connected to the first frame. The H-shaped block has two guide holes. One end of each optical shaft is inserted into the two guide holes of the H-shaped block, and the other end of each optical shaft is fixedly connected to the mounting plate. The rubber roller is fixedly mounted on the mounting plate. The end of the push rod of the first cylinder is threadedly connected to the mounting plate, and the cylinder body of the first cylinder is fixedly mounted on the H-shaped block by screws. The first cylinder can extend and retract its push rod, thereby driving the rubber roller and optical shaft to extend and retract.

[0013] Furthermore, the multi-plate pressure roller structure includes multiple pressure rollers, a pre-stitched piercing roller, a multi-plate pressure roller support arm, an improved pre-stitched piercing roller support arm, a cam follower support arm, a cam follower, and a wear-resistant plate. Multiple pressure rollers are mounted on the multi-plate pressure roller support arm, and an improved pre-stitched piercing roller support arm is mounted on the multi-plate pressure roller support arm. The improved pre-stitched piercing roller support arm is mounted with a wear-resistant plate and a pre-stitched piercing roller. The cam follower support arm is fixed on the second frame, and a cam follower is mounted on the cam follower support arm. The cam follower and the wear-resistant plate can cooperate to form a cam pair.

[0014] The beneficial effects of this invention are as follows: Compared with the prior art, this invention can automatically repair PA composite joints that have been split open by multiple pressure rollers, improving the quality of tire carcass joint stitching and reducing the defect rate of tire carcasses. Simultaneously, manual intervention is no longer required when repairing PA composite joints, thus improving the efficiency of tire carcass production while reducing the workload of personnel, thereby mitigating the risk of accidents to some extent. Furthermore, this invention reduces the installation space required for the joint stitching device, allowing more safety space for adjacent components, reducing spatial constraints on neighboring components, and providing a more relaxed environment for them.

[0015] Other features and advantages of the invention will be set forth in the description which follows, and will be apparent in part from the description, or may be learned by practicing the invention. The objects and other advantages of the invention are realized and obtained in accordance with the structures particularly pointed out in the description, claims and drawings.

[0016] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, preferred embodiments are described below in detail with reference to the accompanying drawings. Attached Figure Description

[0017] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0018] Figure 1 A front view of a joint stitching and repair device for tire blanks provided in an embodiment of the present invention;

[0019] Figure 2 An axonometric view of a joint stitching and repair device for tire blanks provided in an embodiment of the present invention;

[0020] Figure 3 This is a schematic diagram of the sidewall pressure roller assembly structure of a joint stitching repair device for tire blanks provided in an embodiment of the present invention;

[0021] Figure 4 A schematic diagram of a tire sidewall pressure roller assembly for a joint stitching repair device for tire blanks, provided in an embodiment of the present invention, showing the tire sidewall being rolled.

[0022] Figure 5 A schematic diagram of a joint stitching and repair device for a tire blank, provided in an embodiment of the present invention, installed on a front guide rail;

[0023] Figure 6 Another schematic diagram of a joint stitching and repair device for a tire blank, provided in an embodiment of the present invention, installed on a front guide rail;

[0024] Figure 7 A schematic diagram showing the positions of a joint stitching and repair device for a tire blank and a forming drum, provided in an embodiment of the present invention;

[0025] Figure 8 An isometric view of a multi-piece pressure roller assembly for a joint stitching repair device for tire blanks provided in an embodiment of the present invention;

[0026] Figure 9 A schematic diagram of a multi-piece pressure roller assembly for rolling PA composite joints in a joint stitching and repair device for tire blanks provided in an embodiment of the present invention;

[0027] Figure 10 A schematic diagram of the structure of a guide unit for a joint stitching and repair device for a tire blank, provided in an embodiment of the present invention;

[0028] Figure 11 A front view of the second cylinder retracted in a conventional multi-plate pressure roller assembly in the prior art, for a tire carcass joint stitching repair device provided in an embodiment of the present invention;

[0029] Figure 12 A partial structural diagram of a conventional multi-plate pressure roller assembly in the prior art for a joint stitching and repair device for tire blanks provided in an embodiment of the present invention;

[0030] Figure 13 A front view of a multi-piece pressure roller assembly for a joint stitching and repair device for a tire blank, provided in an embodiment of the present invention;

[0031] Figure 14 This is a schematic diagram of the structure of a cam pair for a joint stitching and repair device for a tire blank, provided in an embodiment of the present invention.

[0032] Figure 15 A partial structural schematic diagram of a multi-piece pressure roller assembly for a joint stitching and repair device for tire blanks provided in an embodiment of the present invention;

[0033] Figure 16 A front view of the second cylinder in the extended state of a multi-plate pressure roller assembly of a tire blank joint stitching repair device provided in an embodiment of the present invention;

[0034] Figure 17 This is a schematic diagram of the tire sidewall of a tire blank being attached to a molding drum in a joint stitching and repair device for tire blanks provided in an embodiment of the present invention. Detailed Implementation

[0035] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0036] Example 1

[0037] To facilitate understanding of this embodiment, in conjunction with Figures 1-17 This invention provides a detailed description of a joint stitching and repair device for tire blanks, as disclosed in an embodiment of the present invention.

[0038] Combination Figure 1 , Figure 2 The joint stitching and repair device for tire blanks provided in this embodiment includes:

[0039] The tire sidewall pressure roller assembly 1, servo drive unit 2, multi-plate pressure roller assembly 3, and first frame 4 are all mounted on the first frame 4. The tire sidewall pressure roller assembly 1 and the multi-plate pressure roller assembly 3 are fixed on both sides of the first frame 4, and the servo drive unit 2 is fixed in the middle of the first frame 4.

[0040] Combination Figure 3 The tire sidewall pressure roller assembly 1 includes a rubber roller 5, a guide unit 6, and a first cylinder 7. The first cylinder 7 is fixed to the first frame 4 by screws. The push rod of the first cylinder 7 is fixedly connected to one end of the guide unit 6, and the other end of the guide unit 6 is fixedly connected to the rubber roller 5. Figure 4 When the first cylinder 7 extends, the rubber roller 5 can contact the tire blank and apply pressure to the sidewall edge of the tire blank; when the first cylinder 7 retracts, the rubber roller 5 can leave the tire blank.

[0041] Combination Figure 5 The servo drive unit 2 includes a servo motor, a reducer, and a gear. The servo motor is fixed to the first frame 4 by screws. The output end of the servo motor is connected to the reducer, and the reducer is connected to the gear. The gear extends from the bottom surface of the first frame 4 and meshes with the front guide rail rack 193 on the front guide rail 19, thereby driving the joint sewing device to move laterally on the front guide rail 19.

[0042] Specifically, in combination Figure 6The front guide rail 19 includes a base 191, two linear guide rails 192, and a front guide rail rack 193. The two linear guide rails 192 are fixedly mounted on both sides of the base 191 by screws, and the front guide rail rack 193 is fixedly mounted on the middle of the base 191 by screws. Each of the two linear guide rails 192 is provided with a slider. The joint sewing device is mounted on the slider of the linear guide rail 192. The gear of the servo drive unit 2 meshes with the front guide rail rack 193 to achieve gear rotation, thereby enabling the joint sewing device to move on the front guide rail 19.

[0043] Combination Figure 7 The forming drum 21 is mounted on the front guide rail 19 via the forming drum housing 20, and the forming drum housing 20 contains a motor for driving the forming drum 21 to rotate. The joint sewing device is located below the forming drum 21. Since the joint sewing device can move on the front guide rail 19 by means of the servo drive unit 2, the position of the joint sewing device relative to the forming drum 21 can be changed, and the direction of movement of the joint sewing device is consistent with the axial direction of the forming drum 21.

[0044] Combination Figure 8 The multi-plate pressure roller assembly 3 includes a multi-plate pressure roller structure 8, a second cylinder 9, and a second frame 10. The second frame 10 is fixedly mounted on the first frame 4. The second cylinder 9 and the multi-plate pressure roller structure 8 are mounted on the second frame 10, and the output end of the second cylinder 9 is connected to the multi-plate pressure roller structure 8. Figure 9 When the second cylinder 9 extends, the multi-plate pressure roller structure 8 can contact the PA composite joint of the tire blank. When the joint sewing device moves laterally, the multi-plate pressure roller structure 8 can sew the PA composite joint. When the second cylinder 9 retracts, the multi-plate pressure roller structure 8 separates from the PA composite joint.

[0045] Combination Figure 10 The guide unit 6 includes an H-shaped block 601, two optical shafts 602, and a mounting plate 603. The H-shaped block 601 is fixedly connected to the first frame 4. The H-shaped block 601 has two guide holes, one end of each optical shaft 602 is inserted into the two guide holes of the H-shaped block 601, and the other end of each optical shaft 602 is fixedly connected to the mounting plate 603. The rubber roller 5 is fixedly mounted on the mounting plate 603. The end of the push rod of the first cylinder 7 is threadedly connected to the mounting plate 603, and the cylinder body of the first cylinder 7 is fixedly mounted on the H-shaped block 601 by screws. The first cylinder 7 can extend and retract its push rod, thereby driving the rubber roller 5 and the optical shafts 602 to extend and retract.

[0046] Combination Figure 11 , Figure 12In the existing structure, the traditional multi-plate pressure roller structure includes multiple pressure rollers, a pre-stitched barbed roller 11, a pre-stitched barbed roller support arm 12, a multi-plate pressure roller support arm 13, and a spring 14. Multiple pressure rollers are mounted on the multi-plate pressure roller support arm 13, and the multi-plate pressure roller support arm 13 is connected to the pre-stitched barbed roller support arm 12 via the spring 14. The pre-stitched barbed roller 11 is mounted on the pre-stitched barbed roller support arm 12. For example... Figure 11 As shown, in its natural state, the multi-plate pressure roller and the pre-stitching roller 11 maintain a fixed relative position due to the tension of the spring 14. Therefore, when the second cylinder 9 is in the retracted state, the pre-stitching roller 11 will be higher than the multi-plate pressure roller, occupying a large amount of installation space.

[0047] Based on this, this embodiment provides a preferred implementation method, in which the following is combined with Figures 13-16 The multi-plate pressure roller structure 8 includes multiple pressure rollers, a pre-stitched piercing roller 11, a multi-plate pressure roller support arm 13, a spring 14, an improved pre-stitched piercing roller support arm 15, a cam follower support arm 16, a cam follower 17, and a wear-resistant plate 18. Multiple pressure rollers are mounted on the multi-plate pressure roller support arm 13, and the multi-plate pressure roller support arm 13 is connected to the improved pre-stitched piercing roller support arm 15 via the spring 14. The improved pre-stitched piercing roller support arm 15 is equipped with the wear-resistant plate 18 and the pre-stitched piercing roller 11. The cam follower support arm 16 is fixed to the second frame 10, and a cam follower 17 is mounted on the cam follower support arm 16. The cam follower 17 and the wear-resistant plate 18 can cooperate to form a cam pair. Figure 13 As shown, when the second cylinder 9 is in the retracted state, due to the action of the cam pair, the height of the pre-stitching roller 11 can be limited below the multi-plate pressure roller; as Figure 16 As shown, when the second cylinder 9 is in the extended state, the pre-stitching roller 11 can be released from the constraint of the cam pair, thus effectively reducing the installation space of the pre-stitching roller 11.

[0048] Based on the above, the working principle of the joint stitching and repair device for tire blanks provided in this embodiment is as follows:

[0049] S1. The second cylinder 9 in the multi-plate pressure roller assembly 3 extends, so that the multi-plate pressure roller structure 8 comes into contact with the tire blank.

[0050] S2, the servo drive unit 2 drives the joint sewing device to move laterally on the front guide rail 19, so that multiple pressure rollers roll on the PA composite joint of the tire blank and sew the PA composite joint.

[0051] S3, the second cylinder 9 of the multi-plate pressure roller assembly 3 retracts, causing the multi-plate pressure roller to separate from the PA composite joint.

[0052] S4. The joint sewing device moves laterally to the vicinity of the tire sidewall of the tire blank, and the first cylinder 7 of the sidewall pressure roller assembly 1 extends, so that the rubber roller 5 contacts the tire blank.

[0053] In this case, the direction in which the first cylinder 7 of the tire side roller assembly 1 extends is perpendicular to the axial direction of the forming drum 21.

[0054] S5. The forming drum 21 rotates actively, and the rubber roller 5 rotates passively and crushes the sidewall edge of the tire blank to complete the repair of the PA composite joint.

[0055] It should be noted that in this embodiment, the sidewall of the tire blank is a rubber material wound in an annular strip and attached to the molding drum 21. In the above steps, when the rubber roller 5 is pressing the tire blank, it only needs to press the edge of the sidewall to repair the PA composite joint that has been crushed by multiple pressure rollers. Figure 17 This is a schematic diagram showing the tire sidewall being attached to the molding drum 21. Figure 17 The location indicated by point A is the edge of the tire sidewall that is pressed by the rubber roller 5 when the tire sidewall roller assembly 1 repairs the PA composite joint.

[0056] It should be noted that, in this document, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0057] Finally, it should be noted that the above-described embodiments are merely specific implementations of the present invention, used to illustrate the technical solutions of the present invention, and not to limit it. The scope of protection of the present invention is not limited thereto. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that any person skilled in the art can still modify or easily conceive of changes to the technical solutions described in the foregoing embodiments within the technical scope disclosed in the present invention, or make equivalent substitutions for some of the technical features; and these modifications, changes, or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention, and should all be covered within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the scope of the claims.

Claims

1. A joint stitching and repair device for tire blanks, characterized in that, include: The tire sidewall pressure roller assembly (1), servo drive unit (2), multi-piece pressure roller assembly (3), and first frame (4) are all mounted on the first frame (4). The tire sidewall pressure roller assembly (1), servo drive unit (2), and multi-piece pressure roller assembly (3) are fixed on both sides of the first frame (4), and the servo drive unit (2) is fixed in the middle of the first frame (4). The tire sidewall pressure roller assembly (1) includes a rubber roller (5), a guide unit (6) and a first cylinder (7). The first cylinder (7) is fixed to the first frame (4) by screws. The push rod of the first cylinder (7) is fixedly connected to one end of the guide unit (6), and the other end of the guide unit (6) is fixedly connected to the rubber roller (5). The guide unit (6) includes an H-shaped block (601), two optical shafts (602) and a mounting plate (603). The H-shaped block (601) is fixedly connected to the first frame (4). The H-shaped block (601) has two guide holes. One end of the two optical shafts (602) is inserted into the two guide holes of the H-shaped block (601), and the other end of the two optical shafts (602) is fixedly connected to the mounting plate (603). The rubber roller (5) is fixedly installed on the mounting plate (603). The end of the push rod of the first cylinder (7) is threadedly connected to the mounting plate (603), and the cylinder body of the first cylinder (7) is fixedly installed on the H-shaped block (601) by screws. The first cylinder (7) can extend and retract its push rod, thereby driving the rubber roller (5) and the optical shaft (602) to extend and retract. The servo drive unit (2) includes a servo motor, a reducer and a gear. The servo motor is fixed to the first frame (4) by screws. The output end of the servo motor is connected to the reducer. The reducer is connected to the gear. The gear extends from the bottom surface of the first frame (4) and meshes with the front guide rail rack on the front guide rail (19), thereby driving the joint sewing device to move laterally on the front guide rail (19). The multi-plate pressure roller assembly (3) includes a multi-plate pressure roller structure (8), a second cylinder (9), and a second frame (10). The second frame (10) is fixedly installed on the first frame (4). The second frame (10) is equipped with the second cylinder (9) and the multi-plate pressure roller structure (8). The output end of the second cylinder (9) is connected to the multi-plate pressure roller structure (8). The multi-plate pressure roller structure (8) includes multiple pressure rollers, a pre-stitched piercing roller (11), a multi-plate pressure roller support arm (13), an improved pre-stitched piercing roller support arm (15), a cam follower support arm (16), a cam follower (17), and a wear-resistant plate (18). Multiple pressure rollers are installed on the multi-plate pressure roller support arm (13), and an improved pre-stitched piercing roller support arm (15) is installed on the multi-plate pressure roller support arm (13). A wear-resistant plate (18) and a pre-stitched piercing roller (11) are installed on the improved pre-stitched piercing roller support arm (15). The cam follower support arm (16) is fixed on the second frame (10), and a cam follower (17) is installed on the cam follower support arm (16). The cam follower (17) and the wear-resistant plate (18) can cooperate with each other to form a cam pair.

2. The joint stitching and repair device for tire blanks according to claim 1, characterized in that, When the first cylinder (7) extends, the rubber roller (5) can contact the tire blank and apply pressure to the sidewall edge of the tire blank; when the first cylinder (7) retracts, the rubber roller (5) can leave the tire blank.

3. The joint stitching and repair device for tire blanks according to claim 1, characterized in that, When the second cylinder (9) extends, the multi-plate pressure roller structure (8) can contact the PA composite joint of the tire blank. When the joint sewing device moves laterally, the multi-plate pressure roller structure (8) can sew the PA composite joint. When the second cylinder (9) retracts, the multi-plate pressure roller structure (8) separates from the PA composite joint.

4. The joint stitching and repair device for tire blanks according to claim 1, characterized in that, The front guide rail (19) includes a base (191), two linear guide rails (192), and a front guide rail rack (193). The two linear guide rails (192) are fixedly installed on both sides of the base (191) by screws, and the front guide rail rack (193) is fixedly installed in the middle of the base (191) by screws. Each of the two linear guide rails (192) is provided with a slider. The joint sewing device is installed on the slider of the linear guide rail (192). The gear of the servo drive unit (2) meshes with the front guide rail rack (193) to realize the gear rotation, thereby enabling the joint sewing device to move on the front guide rail (19).

5. A joint stitching and repair device for tire blanks according to claim 1 or 4, characterized in that, The forming drum (21) is mounted on the front guide rail (19) via the forming drum housing (20), and the forming drum housing (20) is equipped with a motor to drive the forming drum (21) to rotate; the joint sewing device is located below the forming drum (21), and the joint sewing device can move on the front guide rail (19) by means of the servo drive unit (2). The position of the joint sewing device relative to the forming drum (21) can be changed, and the moving direction of the joint sewing device is consistent with the axial direction of the forming drum (21).

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