Central mechanism and tire vulcanization equipment

Abstract

The invention belongs to the technical field of tire vulcanization equipment, and discloses a central mechanism and tire vulcanization equipment. The center mechanism comprises an upper ring, a lower ring, a capsule and a driving assembly, the upper ring and the lower ring are connected with the upper side and the lower side of the capsule respectively, and the driving assembly is used for driving the upper ring and the lower ring to move up and down. The driving assembly comprises an installation part and a center rod, the installation part is arranged on a frame body of the tire vulcanization equipment, the center rod is vertically arranged on the installation part in a sliding mode, and the upper side of the center rod is connected with the upper ring. The driving assembly further comprises a driving air cylinder, a bearing piece and an adapter piece, the driving air cylinder is arranged on the mounting piece, a piston rod of the driving air cylinder can extend downwards, the bearing piece is connected with the piston rod, and the bearing piece is connected with the lower ring through the adapter piece. The driving assembly further comprises a driving motor and a transmission part, the driving motor is arranged on the bearing part, and the driving motor drives the center rod to slide through the transmission part. Hydraulic oil or power water does not need to serve as a transmission medium, and the risk of oil leakage or water pollution is eliminated.

Description

Technical Field

[0001] The invention relates to the technical field of tire vulcanization equipment, and in particular to a central mechanism and tire vulcanization equipment. Background Art

[0002] In the field of tire manufacturing, tire vulcanization is a key process link that determines the quality and performance of tires. It promotes cross-linking reaction of rubber through specific temperature, pressure and time conditions, thereby giving the tire the required physical and mechanical properties.

[0003] At present, traditional central mechanisms are mostly driven by hydraulic or water cylinders. The hydraulic drive method relies on hydraulic oil to transmit power, while the water cylinder drive method requires additional power water to realize the movement of the central mechanism.

[0004] However, the hydraulic drive method has the risk of hydraulic oil leakage. Once leakage occurs, it will not only cause environmental pollution, but may also cause equipment failure and increase maintenance costs. Although the water cylinder drive method avoids the oil pollution problem, it is bulky and requires an additional power water supply system, which also increases the energy consumption and operating costs of the tire vulcanization equipment. At the same time, during the long-term operation of the tire vulcanization equipment, the aging of wearing parts will further increase the possibility of hydraulic oil leakage, thereby affecting the normal operation of the equipment and reducing production efficiency.

[0005] Therefore, the above problems need to be solved urgently. Summary of the invention

[0006] The purpose of the present invention is to provide a central mechanism and tire vulcanizing equipment to eliminate the risk of oil leakage or water pollution, thereby complying with the industry trend of tire vulcanizing equipment towards green and intelligent development.

[0007] To achieve this object, the present invention adopts the following technical solutions:

[0008] A central mechanism, comprising an upper ring, a lower ring, a capsule and a driving assembly, wherein the upper ring and the lower ring are respectively connected to the upper and lower sides of the capsule, and the driving assembly is used to drive the upper ring and the lower ring to move up and down.

[0009] The driving assembly comprises a mounting member and a center rod, wherein the mounting member is arranged on a frame of the tire vulcanizing equipment, the center rod is vertically slidably arranged on the mounting member, and the upper side of the center rod is connected to the upper ring;

[0010] The driving assembly further comprises a driving cylinder, a bearing member and an adapter member, wherein the driving cylinder is arranged on the mounting member, a piston rod of the driving cylinder can extend downward, the bearing member is connected to the piston rod, and the bearing member is connected to the lower ring through the adapter member;

[0011] The driving assembly further comprises a driving motor and a transmission member. The driving motor is arranged on the bearing member, and the driving motor drives the central rod to slide through the transmission member.

[0012] Preferably, the transmission member comprises a ball screw, a screw nut and a guide rod, wherein:

[0013] The ball screw is connected to the output shaft of the driving motor and is arranged in the vertical direction. The screw nut cooperates with the thread of the ball screw. The lower side of the center rod is connected to the screw nut. The guide rod is vertically arranged on the bearing member, and the screw nut can slide along the guide rod.

[0014] Preferably, the center rod is hollow and is sleeved on the outer circumference of the ball screw and is clearance-matched therewith.

[0015] Preferably, the adapter is the guide rod, and two ends of the guide rod are respectively connected to the supporting member and the lower ring.

[0016] Preferably, the central mechanism further comprises a heating element disposed inside the capsule, and the heating element is configured to heat the medium inside the capsule.

[0017] Preferably, the central mechanism further comprises a circulation member disposed inside the capsule, and the circulation member is configured to drive the medium to flow inside the capsule.

[0018] Preferably, the circulation member comprises a fan and a rotating member driving the fan to rotate, wherein the rotating member is disposed on the mounting member and is used to drive the fan to rotate.

[0019] Preferably, the heating element is located on the suction side of the fan.

[0020] Preferably, the capsule comprises an inlet and an outlet, the inlet is located at the suction side of the fan, and the outlet is located at the blowing side of the fan.

[0021] A tire vulcanization device comprises a mold, a medium supply system and the above-mentioned central mechanism, wherein the medium supply system is used to supply medium to the central mechanism, and the central mechanism can inject the medium into a bladder to expand the bladder and fit the tire blank to the cavity of the mold.

[0022] Beneficial effects of the present invention:

[0023] 1. The drive assembly in the central mechanism provided by the present invention uses a drive cylinder and a drive motor as the power structure, without hydraulic oil or power water as the transmission medium, fundamentally eliminating the risk of oil leakage or water pollution, thus conforming to the industry trend of the tire vulcanization equipment towards green and intelligent development.

[0024] 2. The drive cylinder and the drive motor are integrated on the mounting part. Compared with the huge cylinder body of the traditional water cylinder and the hydraulic station pipeline, the structure is more compact. In addition, due to the low density of water, the cylinder diameter needs to be increased for water cylinder drive, while the piston area of the cylinder is small, and the cylinder diameter can be significantly reduced under the same thrust; at the same time, there are no vulnerable parts such as hydraulic valve groups or water cylinder seals inside the drive motor, and there is no problem of valve jamming caused by oil pollution, so the equipment failure rate is greatly reduced and the production efficiency is significantly improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 is a schematic structural diagram of the central mechanism provided by the present invention;

[0026] Figure 2 is a schematic structural diagram of the drive motor, drive cylinder, bearing part and transmission part provided by the present invention;

[0027] Figure 3 is a schematic structural diagram of the heating part and the circulation part provided by the present invention.

[0028] In the figure:

[0029] 100, mounting part; 1, central rod; 2, drive motor; 3, drive cylinder; 4, bearing part; 5, transmission part; 51, ball screw; 52, screw nut; 53, guide rod; 6, heating part; 7, circulation part; 71, fan; 72, rotating part. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0030] Before explaining any embodiment of the present application in detail, it should be understood that the present application is not limited to the structural details and component arrangements described in the following description or shown in the above drawings.

[0031] In the present application, the terms "comprising", "including", "having" or any other variant thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements not only includes those elements but also includes other elements not expressly listed, or further includes elements inherent to such process, method, article or device. Without further limitation, an element defined by the statement "including one..." does not exclude the existence of another identical element in the process, method, article or device including that element.

[0032] In this application, the term "and / or" describes the relationship between associated objects and indicates three possible relationships. For example, a centrifugal vortex magnetic pump and / or a centrifugal vortex magnetic pump can represent: the sole existence of a centrifugal vortex magnetic pump, the simultaneous existence of a centrifugal vortex magnetic pump and a centrifugal vortex magnetic pump, and the sole existence of a centrifugal vortex magnetic pump, these three situations. Additionally, in this application, the character " / " generally indicates that the associated objects before and after are in an "and / or" relationship.

[0033] In this application, the terms "connected", "combined", "coupled", and "mounted" can be direct connections, combinations, couplings, or mountings, or they can be indirect connections, combinations, couplings, or mountings. Among them, for example, a direct connection means that two parts or components are connected together without the need for an intermediate member, and an indirect connection means that two parts or components are respectively connected to at least one intermediate member, and these two parts or components are connected through the intermediate member. In addition, "connected" and "coupled" are not limited to physical or mechanical connections or couplings and can include electrical connections or couplings.

[0034] In this application, those of ordinary skill in the art will understand that relative terms used in connection with a quantity or condition (such as "about", "approximately", "substantially", etc.) are intended to include the stated value and have the meaning indicated by the context. For example, such relative terms include at least the degree of error associated with the measurement of a particular value, tolerances resulting from manufacturing, assembly, use in relation to a particular value, etc. Such terms should also be considered to disclose a range defined by the absolute values of two endpoints. The relative term may refer to a plus or minus a certain percentage (such as 1%, 5%, 10% or more) of the indicated value. A numerical value without the use of a relative term should also be disclosed as a specific value with a tolerance. In addition, when expressing a relative angular positional relationship (such as substantially parallel, substantially perpendicular), "substantially" may refer to a plus or minus a certain number of degrees (such as 1 degree, 5 degrees, 10 degrees or more) based on the indicated angle.

[0035] In this application, those of ordinary skill in the art will understand that the functions performed by a component can be performed by one component, multiple components, one part, or multiple parts. Similarly, the functions performed by a part can also be performed by one part, one component, or a combination of multiple parts.

[0036] In this application, the orientation terms such as "upper", "lower", "left", "right", "front", and "rear" are described based on the orientation and positional relationship shown in the drawings, and should not be construed as a limitation on the embodiments of this application. In addition, in the context, it should also be understood that when it is mentioned that one component is connected "above" or "below" another component, it can not only be directly connected "above" or "below" another component, but also be indirectly connected "above" or "below" another component through an intermediate component. It should also be understood that the orientation terms such as the upper side, the lower side, the left side, the right side, the front side, and the rear side not only represent the positive orientation, but can also be understood as the side orientation. For example, the lower side can include directly below, lower left, lower right, lower front, and lower rear, etc.

[0037] Please refer to Figures 1 to 3 , this embodiment provides a central mechanism. The central mechanism includes an upper ring, a lower ring, a capsule, and a driving assembly. The upper ring and the lower ring are respectively connected to the upper and lower sides of the capsule, and the driving assembly is used to drive the upper ring and the lower ring to move up and down.

[0038] Specifically, the driving assembly includes a mounting member 100 and a central rod 1. The mounting member 100 is arranged on the frame of the tire vulcanizing equipment. The central rod 1 is vertically slidably arranged on the mounting member 100, and the upper side of the central rod 1 is connected to the upper ring. The driving assembly further includes a driving cylinder 3, a bearing member 4, and a connecting member. The driving cylinder 3 is arranged on the mounting member 100, and the piston rod of the driving cylinder 3 can extend downward. The bearing member 4 is connected to the piston rod, and the bearing member 4 is connected to the lower ring through the connecting member. The driving assembly further includes a driving motor 2 and a transmission member 5. The driving motor 2 is arranged on the bearing member 4, and the driving motor 2 drives the central rod 1 to slide through the transmission member 5.

[0039] With such a setting, the driving motor 2 converts the rotational motion into the vertical sliding of the central rod 1 through the transmission member 5. Since the upper side of the central rod 1 is rigidly connected to the upper ring, the driving motor 2 can precisely control the rise or fall of the upper ring by forward and reverse rotation to realize the position adjustment of the upper end of the capsule. In addition, the piston rod of the driving cylinder 3 is connected downward to the bearing member 4, and the bearing member 4 is connected to the lower ring through the connecting member. The telescopic movement of the piston rod of the cylinder directly drives the bearing member 4 and the lower ring to move up and down, and the telescopic movement of the piston rod of the driving cylinder 3 can precisely control the rise or fall of the lower ring.

[0040] Combined with the tire vulcanization process, the specific operation process is as follows:

[0041] Before the capsule expands, the piston rod of the driving cylinder 3 extends, pushing the bearing member 4 and the lower ring connected thereto to rise to a preset position. At the same time, the driving motor 2 controls the upper ring to descend, so that the upper and lower ends of the capsule approach each other, so that the subsequent capsule can expand to fit the green tire to the cavity of the mold.

[0042] After the capsule shrinks, the driving motor 2 drives the upper ring to rise. At the same time, the piston rod of the cylinder retracts to pull the lower ring down. The capsule shrinks due to the reverse movement of the upper and lower ends, thereby separating the vulcanized tire from the mold.

[0043] It can be understood that the driving assembly uses the driving cylinder 3 and the driving motor 2 as the power structure, without hydraulic oil or power water as the transmission medium, fundamentally eliminating the risks of oil leakage or water pollution, thus conforming to the industry trend of the green and intelligent development of tire vulcanization equipment.

[0044] It can also be understood that the driving cylinder 3 and the driving motor 2 are integrated on the mounting member 100, and the structure is more compact compared to the huge cylinder body and hydraulic station pipelines of traditional water cylinders. In addition, due to the low density of water, the cylinder diameter needs to be increased for water cylinder drive, while the piston area of the cylinder is small, and the cylinder diameter can be greatly reduced under the same thrust. At the same time, there are no vulnerable parts such as hydraulic valve groups or water cylinder seals inside the driving motor 2, and there is no valve jamming problem caused by oil pollution, resulting in a significant reduction in the equipment failure rate and a remarkable improvement in production efficiency.

[0045] It should be noted that the specific models of the driving cylinder 3 and the driving motor 2 can be selected according to the actual application scenario. Among them, the driving motor 2 is preferably a servo motor, and the driving cylinder 3 is preferably a driving cylinder 3 with a displacement sensor to realize closed-loop control of the upper ring and the lower ring respectively, real-time feedback of the position and speed, and precise adjustment of their movements through the coordination of the control system, so as to precisely control the capsule, avoid the defects of traditional drives, and meet the greening requirements.

[0046] To ensure the transmission accuracy, the transmission member 5 includes a ball screw 51, a screw nut 52, and a guide rod 53. The ball screw 51 is connected to the output shaft of the driving motor 2 and is arranged vertically. The screw nut 52 is in threaded cooperation with the ball screw 51. The lower side of the central rod 1 is connected to the screw nut 52. The guide rod 53 is vertically arranged on the bearing member 4, and the screw nut 52 can slide along the guide rod 53. In this embodiment, two guide rods 53 are arranged oppositely to guide the opposite sides of the screw nut 52, thereby improving the movement stability of the screw nut 52.

[0047] It can be understood that the mechanical transmission structure of the ball screw 51 and the screw nut 52 does not require hydraulic oil or power water as the transmission medium, fundamentally avoiding the problem of liquid leakage. The cooperation between the guide rod 53 and the screw nut 52 only involves the rigid connection of mechanical components, without the risk of seal loss, reducing the maintenance cost and the frequency of shutdown for repair caused by leakage.

[0048] It can also be understood that the ball screw 51 is directly connected to the output shaft of the driving motor 2 in the vertical direction, with a simple structural layout and occupying less space than a water cylinder or a hydraulic system. The guide rod 53 cooperates with the screw nut 52 to limit the radial displacement, ensuring that the central rod 1 slides precisely in the vertical direction, avoiding the movement deviation caused by component shaking or the characteristics of liquid media in the traditional driving method. The high-precision transmission can ensure the synchronous movement of the upper ring and the lower ring, thereby improving the stability of capsule contraction and tire demolding, and indirectly improving the precision of the vulcanization process.

[0049] It should be noted that the transmission member 5 can also adopt a transmission structure such as a gear-rack transmission structure or a worm-gear transmission structure. The following takes the gear-rack transmission structure as an example for a brief description. The output shaft of the driving motor 2 is connected to a driving gear (helical gear or spur gear), which meshes with a vertically arranged rack, and the linear guide rail is used to limit the radial displacement of the central rod 1. When the motor rotates, the gear drives the rack to move up and down, realizing the lifting of the upper ring. Its advantages are high transmission efficiency and simple structure, and it is suitable for high-speed and light-load scenarios (such as rapid demolding). The specific structure of the transmission member 5 can be selected according to the actual application scenario, and this embodiment does not make specific requirements and restrictions on it.

[0050] To improve the transmission efficiency and reduce energy consumption, the central rod 1 is provided in a hollow shape. The central rod 1 is sleeved on the outer periphery of the ball screw 51 and has a clearance fit with it. The central rod 1 adopts a hollow structure. By removing the redundant material in the center of the central rod 1, the mass of the moving parts can be significantly reduced while ensuring the structural strength, which helps to reduce the load torque of the driving motor 2, especially reducing the power loss of the motor during the high-speed demolding stage.

[0051] More importantly, impurities such as rubber debris and water vapor that may be generated during the vulcanization process will be blocked by the outer wall of the central rod 1, thereby avoiding the direct contact between the impurities and the threads of the ball screw 51. Especially in the high-temperature and high-humidity vulcanization environment, the pollution failure frequency of the lubricating grease of the ball screw 51 can be reduced, which helps to extend the service life of the central mechanism.

[0052] In this embodiment, the adapter is the guide rod 53, and both ends of the guide rod 53 are respectively connected to the bearing member 4 and the lower ring. With such a setting, the guide rod 53 undertakes the dual functions of "motion guiding" and "force transmission and connection" at the same time, so that the number of parts can be reduced through the reuse of the structure, and then the driving assembly can be made more compact and the use cost can be lower.

[0053] To further shorten the vulcanization cycle, the central mechanism further includes a heating member 6 disposed inside the bladder, and the heating member 6 is configured to heat the medium inside the bladder. In traditional heating processes, the medium is generally heated and then fed into the bladder. Compared with the traditional external heating method, after the heating member 6 is built into the bladder, the heating member 6 can directly contact the medium, thereby greatly increasing the heating rate of the medium, and further avoiding the extension of the vulcanization cycle caused by temperature lag in the traditional external heating method.

[0054] More importantly, in combination with the optimization of the drive assembly described above, the optimization of the drive assembly and the built-in heating member 6 do not act independently on shortening the vulcanization time, but through the dual acceleration of the improvement of mechanical action efficiency and the optimization of process temperature control, forming a systematic compression of the vulcanization cycle.

[0055] It should be noted that the heating member 6 can be any component with a heating function such as an electric heating tube or a heating wire in the prior art, and is preferably a spiral coil heating tube.

[0056] In particular, the central mechanism further includes a circulation member 7 disposed inside the bladder, and the circulation member 7 is configured to drive the medium to flow inside the bladder. It can be understood that by driving the medium through the circulation member 7 to form a spiral or turbulent flow field, the temperature distribution inside the bladder is made more uniform, thereby avoiding the common defects of "over-vulcanization at the edge / under-vulcanization at the center" in traditional static heating.

[0057] Specifically, the circulation member 7 includes a fan 71 and a rotating member 72 for driving the fan 71 to rotate. The rotating member 72 is disposed on the mounting member 100, and the rotating member 72 is used to drive the fan 71 to rotate. It can be understood that the fan 71 generates a directional air flow through rotation, forming a spiral or axial circulation flow field inside the bladder. Compared with irregular turbulence, the flow rate of the medium can be increased, and the heat exchange area can be increased. In this embodiment, the fan 71 is preferably a turbo fan.

[0058] It should be noted that the rotating member 72 can use a micro motor and be directly mounted on the mounting member 100 to shorten the power transmission path and improve the transmission efficiency, which will not be elaborated here.

[0059] It is worth noting that the air intake side of the fan 71 will actively draw the medium to flow through the heating member 6 to form forced convection. For this reason, in this embodiment, the heating member 6 is located on the air intake side of the fan 71, so that the medium can be in more sufficient contact with the heating member 6 in a flowing state, and the heat transfer efficiency is much higher than that of natural convection, and the heat generated by the heating member 6 can be quickly and evenly diffused to the inside of the bladder, shortening the overall heating time.

[0060] Furthermore, the capsule includes an inlet and an outlet. The inlet is located on the air suction side of the fan 71, and the outlet is located on the air blowing side of the fan 71. It can be understood that there is a negative pressure area on the air suction side of the fan 71. By locating the inlet here, the medium can be actively sucked in by the suction effect of the fan 71, without relying on the pressure or gravity of the medium itself, significantly reducing the flow resistance at the inlet end. In contrast, if the inlet is located on the air blowing side (positive pressure area), the medium may flow slowly due to the small pressure difference.

[0061] In addition, this embodiment further provides a tire vulcanizing device, which includes a mold, a medium supply system, and the above-mentioned central mechanism. The medium supply system is used to supply the medium to the central mechanism, and the central mechanism can inject the medium into the capsule to expand the capsule and fit the green tire blank to the cavity of the mold.

[0062] It can be understood that the tire vulcanizing device including the above-mentioned central mechanism fundamentally eliminates the risks of oil leakage or water pollution, thus conforming to the industry trend of the development of tire vulcanizing devices towards green and intelligent.

[0063] It should be noted that both the mold and the medium supply system are prior arts, and no improvements are made in this embodiment, so they will not be elaborated here.

[0064] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, rather than limiting the implementation manners of the present invention. For those of ordinary skill in the art, various obvious changes, re-adjustments, and substitutions can be made without departing from the protection scope of the present invention. It is not necessary and impossible to enumerate all the implementation manners here. Any modifications, equivalent substitutions, and improvements made within the spirit and principle of the present invention shall be included in the protection scope of the claims of the present invention.

Claims

1. A central mechanism, comprising an upper ring, a lower ring, a capsule and a driving assembly, wherein the upper ring and the lower ring are respectively connected to the upper and lower sides of the capsule, and the driving assembly is used to drive the upper ring and the lower ring to move up and down, characterized in that: The driving assembly comprises a mounting member (100) and a center rod (1), wherein the mounting member (100) is arranged on a frame of the tire vulcanizing equipment, the center rod (1) is vertically slidably arranged on the mounting member (100), and the upper side of the center rod (1) is connected to an upper ring; The driving assembly further comprises a driving cylinder (3), a bearing member (4) and an adapter, wherein the driving cylinder (3) is arranged on the mounting member (100), a piston rod of the driving cylinder (3) can extend downward, the bearing member (4) is connected to the piston rod, and the bearing member (4) is connected to the lower ring via the adapter; The driving assembly further comprises a driving motor (2) and a transmission member (5); the driving motor (2) is arranged on the bearing member (4); and the driving motor (2) drives the central rod (1) to slide via the transmission member (5).

2. The central mechanism according to claim 1, characterized in that, The transmission member (5) comprises a ball screw (51), a screw nut (52) and a guide rod (53), wherein: The ball screw (51) is connected to the output shaft of the drive motor (2) and is arranged in the vertical direction. The screw nut (52) is threadedly matched with the ball screw (51). The lower side of the center rod (1) is connected to the screw nut (52). The guide rod (53) is vertically arranged on the bearing member (4). The screw nut (52) can slide along the guide rod (53).

3. The central mechanism according to claim 2, characterized in that The center rod (1) is arranged in a hollow shape, and the center rod (1) is sleeved on the outer periphery of the ball screw (51) and is clearance-matched therewith.

4. A central mechanism according to claim 3, characterized in that, The adapter is the guide rod (53), and two ends of the guide rod (53) are respectively connected to the bearing member (4) and the lower ring.

5. A central mechanism according to claim 1, characterized in that, The central mechanism further comprises a heating element (6) arranged inside the capsule, and the heating element (6) is configured to heat the medium inside the capsule.

6. The central mechanism according to claim 5, characterized in that, The central mechanism further comprises a circulation member (7) arranged inside the capsule, and the circulation member (7) is configured to drive the medium to flow inside the capsule.

7. A central mechanism according to claim 6, characterized in that, The circulation member (7) comprises a fan (71) and a rotating member (72) for driving the fan (71) to rotate. The rotating member (72) is arranged on the mounting member (100) and is used to drive the fan (71) to rotate.

8. A central mechanism according to claim 7, characterized in that, The heating element (6) is located on the air suction side of the fan (71).

9. A central mechanism according to claim 8, characterized in that, The capsule comprises an inlet and an outlet, wherein the inlet is located on the air suction side of the fan (71), and the outlet is located on the air blowing side of the fan (71).

10. A tire vulcanization device, characterized in that, The tire vulcanization equipment includes a mold, a medium supply system, and a central mechanism as described in any one of claims 1-9. The medium supply system is used to supply medium to the central mechanism, and the central mechanism can inject the medium into the bladder to cause the bladder to expand and fit the green tire to the cavity of the mold.

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