A carcass rolling pressure compensation device

Abstract

This utility model discloses a tire rolling pressure compensation device, relating to the field of tire manufacturing technology. It includes a rolling mill, with a frame connected to one side of the rolling mill via a hydraulic cylinder. Two track blocks are fixedly connected to the frame, and pressure boxes are slidably connected to each track block. A slider slides through each pressure box, and a pressure component is provided between the slider and the inner cavity of the pressure box. Pressure rollers are provided on the side of each slider extending outside the pressure box. Through the cooperation of the adjusting groove on the track block and the connecting piece, the pressure component automatically adjusts the pressure on the pressure rollers during the lateral movement of the pressure box. This allows the pressure rollers to receive gradually increasing pressure compensation as they roll from the center area of ​​the tire crown towards the shoulder arc section, thereby offsetting the normal pressure attenuation caused by the change in the angle between the roller axis and the normal to the tire surface. This ensures uniform force distribution across the entire tire tread, avoids internal defects such as bubbles or delamination, and significantly improves the uniformity and dynamic balance performance of the tire.

Description

Technical Field

[0001] This utility model relates to the field of tire manufacturing technology, specifically a tire rolling pressure compensation device. Background Technology

[0002] In the tire rolling manufacturing process, the pressure compensation device is mainly used to ensure that the force on each part of the formed tire body is uniform, and to avoid uneven tire thickness, different density or internal defects caused by local pressure fluctuations. By automatically adjusting and compensating for pressure changes caused by rolling action, tire blank shape differences or mechanical clearance, the rolling head is always in contact with the tire tread with the set optimal pressure, thereby improving the uniformity, dynamic balance performance and finished product qualification rate of the tire.

[0003] Patent CN220482651U discloses a rolling device for a tire forming machine used in tire production, comprising a side support, a base, and a top platform. The device is characterized by a rolling positioning shaft rotatably mounted on the left side of the side support; the base is installed on the left side of the bottom end of the side support; two venting assemblies are symmetrically arranged on the top of the base; a transmission mechanism synchronously drives the venting assemblies on both sides is provided inside the base; the top platform is installed on the left side of the top end of the side support; and a lower pressure roller is arranged between the top platform and the rolling positioning shaft. Through the lower pressure roller at the top and the venting assemblies at the bottom that can synchronously expand outwards, air inside the various bonding layers of the tire carcass can be quickly expelled, while ensuring the integrity of the rolling process, resulting in a more compact internal structure in the produced tire blank.

[0004] In existing technologies such as those described in the aforementioned patents, during the tire rolling process, simply relying on constant roller pressure cannot guarantee uniform force distribution across the entire tire tread. The tire surface is not a single continuous curved surface, but rather consists of a gently curving crown area and a sharply curving shoulder arc segment. When the roller rolls from the center of the crown area towards both shoulders, as the swing angle of the swing frame gradually increases, the angle between the roller axis and the normal to the tire surface changes accordingly. Under this condition, the effective normal component of the constant pressure applied by the roller on the shoulder arc segment exhibits an exponential attenuation trend. If this is not effectively compensated, it will directly cause poor adhesion at the shoulder area and the inability to expel residual gas, leading to internal defects such as bubbles or delamination, which seriously affects the uniformity and dynamic balance performance of the tire. Utility Model Content

[0005] The purpose of this invention is to provide a tire rolling pressure compensation device to address the shortcomings of the prior art.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a tire carcass rolling pressure compensation device, comprising a rolling machine, one side of which is connected to a frame via a hydraulic cylinder, two track arc blocks fixedly connected to the frame, each track arc block having a pressure box slidably connected therein, each pressure box having a slider slidably passing through it, and a pressure component being provided between the slider and the inner cavity of the pressure box, with pressure rollers provided on the side of each slider extending outside the pressure box; a drive component is also provided on the frame, which drives the two sets of pressure boxes to move laterally via a connector to roll the tire carcass; each track arc block has an adjustment groove, and when the two pressure boxes move, they slide in the corresponding adjustment grooves via a connector to adjust the pressure component to compensate for the pressure of the pressure rollers.

[0007] Furthermore, the pressure assembly includes a wedge block slidably connected in the pressure chamber, and a pressure spring is fixedly connected between the wedge block and the slider.

[0008] Furthermore, a track arc groove is formed on the track arc block, and a slide rod is fixedly connected to the pressure box, with the slide rod sliding in the track arc groove.

[0009] Furthermore, the track groove is formed by connecting a horizontal groove portion and an arc-shaped groove portion.

[0010] Furthermore, the drive assembly includes a bidirectional reciprocating screw rotatably connected to the frame, with threaded blocks threaded to both ends of the bidirectional reciprocating screw, and both threaded blocks sliding laterally on the frame.

[0011] Furthermore, the connecting component is a telescopic connecting rod that is rotatably connected between the threaded block and the pressure box.

[0012] Furthermore, the second connector includes an L-shaped rod that is vertically slidably connected to the pressure box. One end of the L-shaped rod is fixedly connected to a wedge block two. The elastic force of the pressure spring drives the inclined surface of the first wedge block to abut against the inclined surface of the second wedge block.

[0013] Furthermore, the adjusting groove is formed by connecting a horizontal groove portion, an inclined groove portion, and an arc-shaped groove portion.

[0014] In the above technical solution, the tire rolling pressure compensation device provided by this utility model automatically adjusts the pressure of the pressure component on the pressure roller during the lateral movement of the pressure box by cooperating with the adjustment groove on the track arc block and the connecting part two. This allows the pressure roller to obtain gradually increasing pressure compensation when rolling from the center area of ​​the tire crown to the circular arc section of the tire shoulder, thereby offsetting the normal pressure attenuation caused by the change of the angle between the pressure roller axis and the normal of the tire surface, ensuring uniform force on the entire tire tread, effectively solving the problems of poor adhesion at the tire shoulder and the inability to expel residual gas in the prior art, avoiding the formation of internal defects such as bubbles or delamination, significantly improving the uniformity and dynamic balance performance of the tire, and realizing mechanical pressure compensation that automatically, continuously and steplessly adjusts the pressure of the pressure roller with the rolling position throughout the entire rolling stroke. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this utility model. For those skilled in the art, other drawings can be obtained based on these drawings.

[0016] Figure 1 A schematic diagram of the overall structure provided for an embodiment of this utility model; Figure 2 A partial structural schematic diagram provided for an embodiment of this utility model; Figure 3 This is a schematic diagram showing the connection between the threaded block and the pressure box, etc., provided in an embodiment of the present utility model. Figure 4 A longitudinal sectional view of the connection between the pressure box and the track arc block structure provided in an embodiment of this utility model; Figure 5 This is a schematic diagram of the track arc block structure provided in an embodiment of the present utility model.

[0017] Explanation of reference numerals in the attached figures: 1. Roller; 2. Hydraulic cylinder; 3. Frame; 4. Track arc block; 5. Pressure box; 6. Slider; 7. Pressure roller; 8. Adjusting groove; 9. Wedge block one; 10. Pressure spring; 11. Track arc groove; 12. Slide rod; 13. Bidirectional reciprocating screw; 14. Threaded block; 15. Telescopic connecting rod; 16. L-shaped rod; 17. Wedge block two. Detailed Implementation

[0018] To enable those skilled in the art to better understand the technical solution of this utility model, the present utility model will be further described in detail below with reference to the accompanying drawings.

[0019] Please see Figures 1-5This utility model provides a tire rolling pressure compensation device, including a rolling machine 1. One side of the rolling machine 1 is connected to a frame 3 via a hydraulic cylinder 2. The frame 3 serves as the core load-bearing structure for all rolling and compensation components. Two track arc blocks 4 are fixedly connected to the frame 3. Pressure boxes 5 are slidably connected to both track arc blocks 4. Sliding sliders 6 are slidably passed through both pressure boxes 5. A pressure component is provided between the sliders 6 and the inner cavity of the pressure boxes 5. Pressure rollers 7 are provided on the side of both sliders 6 extending to the outside of the pressure boxes 5. The hydraulic cylinder 2 connects the rolling machine 1 and the frame 3, driving the frame 3 to move or retract towards the tire body, thereby achieving initial contact and basic pressure setting between the pressure rollers 7 and the tire body being rolled. The starting position and approximate pressure of the rolling can be adjusted through hydraulic control. One end of the slider 6 receives the thrust of the pressure spring 10 inside the pressure box 5, and the other end extends out of the pressure box 5 and is connected to the pressure rollers 7. The slider 6 can slide axially within the pressure box 5, transmitting the elastic force of the pressure spring 10 to the pressure roller 7, ensuring that the pressure roller 7 always maintains variable pressure against the tire surface. The pressure roller 7 is the terminal actuator that directly contacts and rolls the tire surface, compacting each layer of the tire material, expelling gas, and forming a uniform tire structure. A drive assembly is also installed on the frame 3, which drives the two pressure boxes 5 to move laterally via a connector to roll the tire. Adjustment grooves 8 are provided on both track arc blocks 4. Each adjustment groove 8 is formed by connecting a horizontal groove, an inclined groove, and an arc-shaped groove. Composed of different parts, when it enters the arc groove section from the horizontal groove section through the inclined groove section, it can increase the pressure of the pressure component, thereby compensating the pressure of the pressure roller 7. When the two pressure boxes 5 move, they slide in the corresponding adjustment grooves 8 through the connecting parts to adjust the pressure component to compensate the pressure of the pressure roller 7. The track arc block 4 provides sliding guidance and trajectory control for the pressure box 5. The track arc groove 11 and adjustment groove 8 opened on it are the key paths to realize pressure compensation. The track arc block 4 is fixed on the frame 3 and does not participate in the movement, but its groove shape directly determines the spatial movement trajectory and pressure adjustment timing of the pressure roller 7.

[0020] The pressure assembly includes a wedge block 9 slidably connected in the pressure chamber 5. A pressure spring 10 is fixedly connected between the wedge block 9 and the slider 6. The greater the compression of the spring 10, the greater the thrust applied to the slider 6 and the pressure roller 7. By adjusting the position of the wedge block 9, the spring compression can be dynamically changed, achieving real-time compensation for the rolling pressure.

[0021] The track arc block 4 has a track arc groove 11, and the pressure box 5 is fixedly connected to a slide rod 12, which slides in the track arc groove 11. The track arc groove 11 is formed by connecting a horizontal groove and an arc groove. The slide rod 12 on the pressure box 5 slides in the groove to control the overall movement trajectory of the pressure box 5, so that it moves laterally in the tire crown area and swings along the arc trajectory in the tire shoulder area, so as to ensure that the pressure roller 7 always maintains the correct contact posture with the tire surface.

[0022] The drive assembly includes a bidirectional reciprocating screw 13 rotatably connected to the frame 3. Both ends of the bidirectional reciprocating screw 13 are threadedly connected to threaded blocks 14. Both threaded blocks 14 slide laterally on the frame 3. The two ends of the bidirectional reciprocating screw 13 have opposite threads. When the screw rotates, the two threaded blocks 14 will move towards or away from each other, realizing the synchronous or symmetrical rolling action of the pressure rollers 7 on both sides. The threaded blocks 14 convert the rotational motion of the screw into linear motion.

[0023] The first connecting component is a telescopic connecting rod 15 that is rotatably connected between the threaded block 14 and the pressure box 5. The telescopic connecting rod 15 has a certain degree of telescopicity and is used to transmit the lateral movement of the threaded block 14 to the pressure box 5. At the same time, it allows the pressure box 5 to generate longitudinal or arc displacement under the guidance of the track arc groove 11, thus avoiding rigid interference.

[0024] The second connecting component includes an L-shaped rod 16 that is vertically slidably connected to the pressure box 5. One end of the L-shaped rod 16 is fixedly connected to a wedge block 17. The elastic force of the pressure spring 10 drives the inclined surface of the first wedge block 9 to abut against the inclined surface of the second wedge block 17. During the movement of the pressure box 5, the L-shaped rod 16 is guided up and down by the adjusting groove 8, thereby driving the second wedge block 17 to move. It is the trigger and transmission component for pressure compensation. When the L-shaped rod 16 moves up and down, it pushes the first wedge block 9 to move laterally, thereby changing the compression of the pressure spring 10. Together with the first wedge block 9, it forms an inclined surface drive mechanism, which converts vertical movement into horizontal pressure adjustment.

[0025] In the above technical solution, firstly, the hydraulic cylinder 2 on one side of the rolling mill 1 retracts, driving the frame 3 to move as a whole towards the tire being rolled, until the two pressure rollers 7 contact the surface of the tire and establish an initial basic rolling force. At this time, the pressure spring 10 is in an initial compressed state, and it applies a set initial pressure to the pressure rollers 7 through the slider 6. Subsequently, the drive assembly starts to operate, and the bidirectional reciprocating screw 13 rotates under the drive of an external power source (such as a motor). Since the two ends of the bidirectional reciprocating screw 13 have threads in opposite directions, and the two threaded blocks 14 respectively engage with these two threaded sections and are subject to the lateral sliding limit of the frame 3, when the screw rotates, the two threaded blocks 14 will move in opposite directions along the frame 3, thereby achieving the rolling of both sides. The pressure roller 7 performs symmetrical rolling motions, moving synchronously closer to or further away from the tire's centerline. The lateral linear movement of the threaded block 14 is transmitted to the pressure box 5 via the telescopic connecting rod 15. When the pressure box 5 moves laterally, the sliding rod 12, fixedly connected to its side, remains embedded in the track arc groove 11 on the track arc block 4. When the pressure box 5 is located in the center area of ​​the tire crown, the sliding rod 12 slides in the transverse groove of the track arc groove 11. At this time, the pressure box 5 only moves horizontally laterally, causing the pressure roller 7 to flatten the tire crown area. As the pressure box 5 gradually moves towards the tire shoulder area, the sliding rod 12 enters the arc-shaped groove of the track arc groove 11. Because the trajectory of the arc-shaped groove is curved, the sliding rod 12 is forced to slide along the arc-shaped groove, thereby driving the entire pressure box 5 to move laterally... Simultaneously, it generates oscillation, allowing the axis of the pressure roller 7 to change angle according to the curvature of the tire surface, always maintaining a good contact posture with the tire surface; while the pressure box 5 moves laterally and performs rolling, the pressure compensation mechanism works synchronously, with one side of the upper end of the vertically sliding L-shaped rod 16 on the pressure box 5 in the adjustment groove 8 of the inserted track arc block 4; when the pressure box 5 is in the tire crown area and begins rolling, the end of the L-shaped rod 16 is located in the transverse groove of the adjustment groove 8, which is parallel to the direction of movement of the pressure box 5, so the L-shaped rod 16 does not rise or fall when sliding in the transverse groove, the second wedge block 17 maintains its initial height, and the first wedge block 9 is held in its initial position under the action of the pressure spring 10, the compression amount of the pressure spring 10 The pressure roller 7 remains unchanged, rolling the tire crown with the base pressure. As the pressure box 5 continues to move laterally towards the tire shoulder, the end of the L-shaped rod 16 enters the inclined groove from the horizontal groove of the adjusting groove 8. Since the inclined groove has an angle relative to the horizontal plane, the L-shaped rod 16 is forced to gradually rise along the inclined surface, thereby driving the wedge block 17 to slide upward relative to the pressure box 5. When the wedge block 17 rises, its inclined surface pushes the wedge block 9 that is in contact with it to overcome the elastic force of the pressure spring 10 and move laterally away from the slider 6. This causes the pressure spring 10 to be further compressed, the spring compression increases, and the spring's thrust on the slider 6 increases accordingly. The slider 6 then transmits the increased thrust to the pressure roller 7, and the rolling pressure of the pressure roller 7 on the tire surface increases accordingly.As the pressure box 5 continues to move to the shoulder arc section, the end of the L-shaped rod 16 enters the arc-shaped groove of the adjusting groove 8. The trajectory of this arc-shaped groove matches the arc-shaped groove of the track arc groove 11, allowing the L-shaped rod 16 to maintain its raised position or undergo further fine-tuning within the arc-shaped groove. This maintains or further increases the compression of the pressure spring 10, ensuring that the pressure roller 7 receives maximum pressure compensation in the area of ​​greatest shoulder curvature change, effectively offsetting the normal pressure attenuation caused by the change in the posture of the pressure roller 7.

[0026] The foregoing description only illustrates certain exemplary embodiments of the present invention. Undoubtedly, those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A tire carcass rolling pressure compensation device, comprising a rolling mill, one side of which is connected to a frame via a hydraulic cylinder, characterized in that: Two track arc blocks are fixedly connected to the frame. A pressure box is slidably connected to each of the two track arc blocks. A slider is slidably passed through each of the two pressure boxes. A pressure component is provided between the slider and the inner cavity of the pressure box. A pressure roller is provided on the side of each slider that extends to the outside of the pressure box. The frame is also equipped with a drive assembly, which drives two pressure boxes to move laterally through a connector to roll the tire body. Both track arc blocks are provided with adjustment grooves. When the two pressure boxes move, they slide in the corresponding adjustment grooves through the connecting parts to adjust the pressure components to compensate for the pressure of the pressure rollers.

2. The tire carcass rolling pressure compensation device according to claim 1, characterized in that, The pressure assembly includes a wedge block slidably connected in the pressure chamber, and a pressure spring is fixedly connected between the wedge block and the slider.

3. The tire carcass rolling pressure compensation device according to claim 1, characterized in that, The track arc block has a track arc groove, and a slide rod is fixedly connected to the pressure box, and the slide rod slides in the track arc groove.

4. The tire carcass rolling pressure compensation device according to claim 3, characterized in that, The track groove is formed by connecting a horizontal groove section and an arc-shaped groove section.

5. A tire carcass rolling pressure compensation device according to claim 1, characterized in that, The drive assembly includes a bidirectional reciprocating screw rotatably connected to the frame, with threaded blocks threaded to both ends of the bidirectional reciprocating screw, and both threaded blocks sliding laterally on the frame.

6. A tire carcass rolling pressure compensation device according to claim 5, characterized in that, One of the connecting components is a telescopic connecting rod that is rotatably connected between the threaded block and the pressure box.

7. A tire carcass rolling pressure compensation device according to claim 2, characterized in that, The second connector includes an L-shaped rod that is vertically slidably connected to the pressure box. One end of the L-shaped rod is fixedly connected to a wedge block two. The elastic force of the pressure spring drives the inclined surface of the first wedge block to abut against the inclined surface of the second wedge block.

8. A tire carcass rolling pressure compensation device according to claim 1, characterized in that, The adjusting groove is formed by connecting a horizontal groove, an inclined groove, and an arc-shaped groove.

Images