Tire vulcanizer center mechanism and tire vulcanizer

Abstract

The utility model provides a tire vulcanizer center mechanism and a tire vulcanizer, the center mechanism comprises a mounting rack arranged in a vulcanizing chamber, a cylinder barrel is vertically arranged in the mounting rack, a center rod is arranged in the cylinder barrel, and an upper mounting plate is fixedly mounted at the bottom of the cylinder barrel; one end, extending out of the cylinder body, of a piston rod of the upper ring oil cylinder upwards penetrates through the upper mounting plate and is fixedly connected with the bottom end of a center rod in the cylinder barrel; pull rods are symmetrically arranged on the two sides, located on the cylinder barrel, of the mounting rack, lower mounting plates are fixedly connected to the bottom ends of the pull rods on the two sides, and the ends, extending out of cylinder bodies, of piston rods of the two lower ring oil cylinders upwards penetrate through the lower mounting plates and are fixedly connected with the upper mounting plates; a lower ring seat is fixedly mounted at the top of the cylinder barrel; a clamping ring is fixedly mounted at the top end of the center rod; and a guide sleeve is sleeved outside the cylinder barrel. Compared with an existing structure, the diameter of the oil cylinder can be reduced in a matched mode, so that cost needed by the oil cylinder can be saved, the structure is more compact, occupied space is reduced, and stability and centering performance of the lifting device in the lifting process can be improved.

Description

Technical Field

[0001] The utility model relates to the technical field of vulcanizers, in particular to a tire vulcanizer central mechanism and a tire vulcanizer. Background Art

[0002] The central mechanism, also known as the bladder operating mechanism, is located in the center of the vulcanization chamber and is an important component of the tire vulcanizer. In the tire vulcanizer structure, the space formed by the lower mold and the upper mold in the vulcanization chamber is required to vulcanize and mold the tire embryo. An upper hot plate is set above the upper mold and a lower hot plate is set below the lower mold. The upper and lower hot plates play a heating role, and the central mechanism on the vulcanizer is used to support the semi-finished tire embryo and bladder. Figure 8 As shown, the capsule 1 and the upper ring 11 and the lower ring 12 connected to the capsule 1 form a closed whole. Before vulcanization, the capsule of corresponding specifications is installed on the central mechanism, and the capsule can expand or contract with inflation or degassing, and can also expand and contract with the lifting and lowering of the upper ring. At the beginning of vulcanization, the inner cavity of the capsule is evacuated and shrunk, and then the capsule is manipulated to be loaded into the tire blank; after the mold is closed, a medium such as nitrogen with a specific pressure and temperature is filled into the inner cavity of the capsule to expand the capsule and closely shape the inner surface of the tire blank, completing the shaping and movement required for vulcanization, and ensuring that the tire is fully vulcanized and shaped; after the vulcanization is completed, the mold is opened, and the lower ring cylinder drives the upper ring and the lower ring installed on the capsule of the central mechanism to move upward synchronously. The expanded capsule drives the tire to be unloaded to be removed from the lower mold and drives it to rise to a certain height. After the tire unloading mechanism comes in to hold the tire, the gas inside the capsule is extracted, and the capsule shrinks due to the reduction of the internal air pressure. Subsequently, the upper ring is driven by the upper ring cylinder to rise alone, and the upper ring is separated from the upper bead of the tire. Then the lower ring cylinder drives the central mechanism to descend as a whole, so that the lower ring is separated from the lower bead of the tire, and finally the entire capsule is completely separated from the tire. The tire stays in the tire unloading mechanism and is moved to other processes for subsequent processing. The central mechanism descends and returns to the initial position, waiting for the next tire loading process.

[0003] In the existing hydraulic tire vulcanizer, the lower ring cylinder generally adopts a reverse installation structure. Figure 9As shown, the front end of its cylinder block faces downward, causing its piston rod to extend downward. The end of the piston rod is connected to the bottom of the entire central mechanism including the upper ring cylinder through an oil cylinder connecting seat. When the capsule needs to be lifted, the piston rod of the lower ring cylinder contracts into the cylinder body to drive the entire central mechanism to rise, enabling the capsule to drive the tire to be unloaded thereon to rise. During this process, the hydraulic oil inside the lower ring cylinder needs to act on one side of the piston with a rod, and this acting area is smaller than the other side of the piston without a rod, that is, the thrust generated by the hydraulic oil is smaller. To enable the lower ring cylinder to drive the central mechanism carrying a heavier tire to rise faster, it is necessary to configure an oil cylinder with a relatively larger cylinder diameter, so that the area where the hydraulic oil acts on the piston is larger during use to provide sufficient power. This will result in higher processing and manufacturing costs and maintenance costs required for the lower ring cylinder, and the larger oil cylinder will also occupy too much space, restricting its installable positions and making the loading and unloading process more troublesome; in addition, to ensure the precise dimensions of the tire after vulcanization and meet the quality requirements, the perpendicularity between the central mechanism and the upper surface of the lower hot plate and the coaxiality with the center of the tire unloading mechanism have very high requirements. Therefore, it is necessary to keep the central mechanism stable during the lifting process. In the above structure, the connection between the lower ring cylinder and the central mechanism is far from the vulcanization chamber, which will cause insufficient stability of the central mechanism during the lifting process, easily generating a large swing amplitude. The swing amplitude will be unstable with the change of the air pressure during shaping, and its centering will decrease. There may still be a certain degree of tilting and offset when the central mechanism rises, and this situation is more prominent when vulcanizing large-sized tires, reducing the accuracy of aligning the center of the tire blank with the vulcanization center during shaping and vulcanization, affecting the sealing performance during processing, thus affecting the processing quality of the tire and the subsequent tire unloading work. Summary of the Invention

[0004] The purpose of the present invention is to provide a tire vulcanizer central mechanism and a tire vulcanizer that can save the costs required for the oil cylinder, make the structure more compact, reduce the occupied space, and improve the stability and centering during the lifting process.

[0005] As an aspect of the present invention, a tire vulcanizer central mechanism is provided, including a mounting frame arranged at the bottom of the lower hot plate in the vulcanization chamber. A cylinder barrel is vertically arranged inside the mounting frame. A central rod is arranged inside the cylinder barrel. The bottom of the cylinder barrel is fixedly installed with an upper mounting plate. The bottom of the upper mounting plate is fixedly installed with an upper ring cylinder. The end of the piston rod of the upper ring cylinder extending out of the cylinder body penetrates upward through the upper mounting plate and is fixedly connected to the bottom end of the central rod inside the cylinder barrel;

[0006] The mounting frame is symmetrically provided with tie rods on both sides of the cylinder barrel. The bottom ends of the tie rods on both sides are fixedly connected with lower mounting plates. Two lower ring cylinders are respectively fixedly installed at the bottoms of the two lower mounting plates. The end of the piston rod of the lower ring cylinder extending out of the cylinder body penetrates upward through the lower mounting plate and is fixedly connected to the upper mounting plate;

[0007] A lower ring seat connected to the lower ring of the capsule is fixedly installed at the top of the cylinder barrel. Two through holes are symmetrically arranged on the lower ring seat, and an air inlet conduit and an air outlet conduit are respectively connected to the bottom ends of the two through holes; the top end of the central rod penetrates upward through the lower ring seat and is fixedly installed with a clamping ring connected to the upper ring of the capsule.

[0008] A guide sleeve is sleeved outside the cylinder barrel. The guide sleeve is installed through the upper part of the installation frame and the lower hot plate. An installation groove for accommodating and supporting the lower ring seat is provided above the guide sleeve.

[0009] Further, the central rod includes an upper central rod, a lower central rod, a clamping sleeve and a sheath. The bottom end of the upper central rod and the top end of the lower central rod both have limiting bumps and are abutted against each other up and down. The clamping ring is fixedly installed at the top end of the upper central rod, and the bottom end of the lower central rod is fixedly connected to the piston rod of the upper ring oil cylinder; the clamping sleeve includes two separable clamping parts, and the two clamping parts are combined to form a cylindrical clamping sleeve. The inner wall of the clamping sleeve is provided with limiting concave parts matching the shapes of the limiting bumps of the upper central rod and the lower central rod, so that the clamping sleeve clamps the bottom end of the upper central rod and the top end of the lower central rod together through the two clamping parts. The sheath is sleeved on the outer wall of the clamping sleeve in a matching manner, and a pin for preventing the sheath from sliding relative to the clamping sleeve is provided on the upper part of the sheath.

[0010] Further, the guide sleeve is provided with a limiting bolt penetrating from its outer wall through its inner wall, and a limiting slide rail adapted to the limiting bolt is provided on the outer wall of the cylinder barrel in the vertical direction. When the guide sleeve is sleeved on the outer wall of the cylinder barrel, one end of the limiting bolt located on the inner wall of the guide sleeve is adapted to abut against the limiting slide rail, and when the guide sleeve moves up and down relative to the cylinder barrel, the limiting bolt slides along the limiting slide rail with the guide sleeve.

[0011] Further, a cylinder head is fixedly installed on the top of the lower ring seat, and a plurality of diversion air holes opposite to the positions of the through holes are provided on the cylinder head.

[0012] Further, an annular groove is provided on the inner wall of the guide sleeve, and a guide belt is installed in the annular groove.

[0013] Further, a connecting pipe penetrates through the guide sleeve. One end of the connecting pipe close to the guide sleeve is arranged on the inner wall of the guide sleeve, and an oil cup is installed at the other end of the connecting pipe away from the guide sleeve.

[0014] Further, the guide sleeve is provided with a limiting guide hole through which the air inlet conduit and the air outlet conduit penetrate.

[0015] Furthermore, a switch support plate is provided on the mounting frame, and a proximity switch is provided on the switch support plate. The upper mounting plate is fixedly mounted with a sensing plate that cooperates with the proximity switch. When the piston rod of the lower ring cylinder drives the upper mounting plate to move up and down, the sensing plate moves accordingly and can pass through the position of the proximity switch and sense the proximity switch. The working state of the lower ring cylinder is controlled by a controller electrically connected to the proximity switch.

[0016] Furthermore, a linear displacement sensor is installed at the bottom of the upper ring cylinder, and the linear displacement sensor controls the working state of the upper ring cylinder through a controller electrically connected to the linear displacement sensor.

[0017] As another aspect of the utility model, a tire vulcanizer is provided, including a vulcanization chamber and a capsule, wherein the capsule includes an upper ring and a lower ring connected thereto, the vulcanization chamber is provided with the above-mentioned tire vulcanizer central mechanism, and the capsule is installed on the tire vulcanizer central mechanism, wherein the upper ring of the capsule is fixedly connected to the clamping ring of the central mechanism, and the lower ring of the capsule is fixedly connected to the lower ring seat of the central mechanism.

[0018] The center mechanism of the tire vulcanizer provided by the present utility model is such that tie rods are symmetrically arranged on both sides of the installation frame. The bottom end of the tie rod is connected with a lower mounting plate for fixedly installing a lower ring cylinder, enabling the lower ring cylinder to be installed in the forward direction, that is, the front end of the lower ring cylinder is installed at the bottom of the lower mounting plate, so that the piston rod of the lower ring cylinder can extend upward. Moreover, the upper mounting plate is fixedly installed between the cylinder barrel and the upper ring cylinder, enabling the piston rod of the lower ring cylinder to penetrate upward through the lower mounting plate and be fixedly connected with the upper mounting plate. In the above structure, since the piston rod is arranged upward, when lifting the bladder, the piston rod needs to extend out of the cylinder body. At this time, the hydraulic oil in the lower ring cylinder will act on the side of the piston without the piston rod below it, and the piston is pushed up by the hydraulic oil. The piston rod of the lower ring cylinder can extend upward to drive the upper mounting plate to move upward, thereby enabling the upper ring cylinder, conduit, cylinder barrel, lower ring seat, clamping ring, etc. to rise along the guide sleeve as a whole, causing the bladder to drive the tire to move upward away from the lower mold to complete the required work. Compared with the existing structure, when the lower ring cylinder drives the tire to rise, the acting area of the internal hydraulic oil on the piston is larger, enabling the center structure to generate a large enough thrust to drive the tire to rise, thereby enabling the cylinder diameter of the lower ring cylinder to be appropriately reduced. While ensuring the original working efficiency, it can save the cost required for the lower ring cylinder and make the overall structure more compact, reducing the space occupied by the center mechanism, enabling it to be adapted to more installation positions and being more convenient for loading and unloading. And, after the lower ring cylinder is installed in the forward direction in the above structure, the distance between the piston rod of the lower ring cylinder and the upper mounting plate connected to it and the guide sleeve can be reduced. The position of the upper mounting plate is between the overall moving cylinder barrel and the upper ring cylinder, closer to the vulcanization chamber. Moreover, the cylinder barrel can rise under the guidance of the guide sleeve, enabling the center mechanism to further reduce the situation of tilting and offset caused by excessive left and right swing amplitude during the lifting and lowering process, improving the stability, enabling the center mechanism to remain stable during the lifting and lowering process, and ensuring the centering during mold setting vulcanization to ensure the quality of tires including large-sized tires during vulcanization processing and the normal progress of subsequent tire unloading work. Different specifications of tires can be vulcanized according to different process requirements, and its adaptability is better, being able to meet more usage requirements. Description of the Drawings

[0019] The following further describes the present utility model with reference to the drawings:

[0020] Figure 1 is an axonometric view (omitting the installation frame) of the center mechanism of a tire vulcanizer of the present utility model;

[0021] Figure 2 is a schematic diagram of the overall structure of the center mechanism of a tire vulcanizer of the present utility model;

[0022] Figure 3 is Figure 2 a partial enlarged structural view of part A in

[0023] Figure 4 isFigure 2 Schematic diagram of the partial enlarged structure of part B

[0024] Figure 5 Side view (installation rack omitted) of the central mechanism of a tire vulcanizer according to the present utility model

[0025] Figure 6 Side view structure sectional view of the central mechanism of a tire vulcanizer according to the present utility model

[0026] Figure 7 is Figure 6 Schematic diagram of the partial enlarged structure of part C

[0027] Figure 8 Schematic diagram of the structure of the bladder

[0028] Figure 9 Schematic diagram of the installation structure of the existing lower ring cylinder

[0029] Figure 10 Schematic diagram of the installation structure of the lower ring cylinder of the present utility model

[0030] Reference numerals: 1 - bladder; 2 - lower hot plate; 3 - installation rack; 4 - cylinder barrel; 5 - central rod; 5a - upper central rod; 5b - lower central rod; 6 - upper ring cylinder; 6a - piston rod of the upper ring cylinder; 7 - upper mounting plate; 8 - pull rod; 9 - lower ring cylinder; 9a - piston rod of the lower ring cylinder; 10 - lower mounting plate; 11 - upper ring; 12 - lower ring; 13 - clamping ring; 14 - lower ring seat; 15 - through hole; 16 - intake duct; 17 - exhaust duct; 18 - guide sleeve; 18a - installation groove; 18b - limit guide hole; 19 - jacket; 19a - clamping part; 19b - limit recess; 20 - sheath; 21 - pin; 22 - cylinder head; 22a - diversion air hole; 23 - limit bolt; 24 - limit slide rail; 25 - connecting pipe; 26 - oil cup; 31 - annular groove; 32 - guide belt; 41 - switch support plate; 42 - proximity switch; 43 - induction plate; 44 - linear displacement sensor; 51 - limit projection; 60 - heat insulation plate; 70 - tire. Detailed implementation manners

[0031] The following further elaborates in detail the technical solutions in the embodiments of the present utility model with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all of the embodiments. Based on the embodiments in the present utility model, all other embodiments obtained by those of ordinary skill in the art based on the present utility model fall within the scope of protection of the present utility model. Without conflict, the embodiments in the present utility model and the features in the embodiments may be combined with each other.

[0032] It should be noted that if there are directional indications involved in the embodiments of the present utility model (such as up, down, left, right, front, back, top, bottom, end, inner, outer, horizontal, vertical, counterclockwise, clockwise, radial, axial, etc.), then such directional indications are only used to explain the relative positional relationship, movement conditions, etc. between components in a certain specific posture (as shown in the attached drawings), and are only for the convenience of describing the present utility model and simplifying the description. If this specific posture changes, then the directional indications will also change accordingly. Therefore, it should not be construed as a limitation to the present utility model. In the description of the embodiments, unless otherwise clearly specified and limited, terms such as "installation" and "connection" should be understood in a broad sense. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances. In addition, in the description of the present utility model, terms such as "first" and "second" are used to distinguish one element from another element, and do not have sequentiality and importance; the meaning of "a plurality" is two or more, unless otherwise clearly and specifically limited.

[0033] As Figures 1 to 7 shown, a central mechanism of a tire vulcanizer provided by the present utility model includes an installation frame 3 provided at the bottom of a lower hot plate 2 in a vulcanization chamber. The installation frame 3 is installed together with the lower hot plate 2, so that the central mechanism and the lower hot plate 2 form an integral structure. Among them, a cylinder barrel 4 is vertically arranged in the installation frame 3, a central rod 5 is arranged in the cylinder barrel 4, an upper mounting plate 7 is fixedly installed at the bottom of the cylinder barrel 4, an upper ring oil cylinder 6 is fixedly installed at the bottom of the upper mounting plate 7, and a piston rod 6a of the upper ring oil cylinder 6 extends upward through one end of the cylinder body and is fixedly connected to the bottom end of the central rod 5 in the cylinder barrel 4.

[0034] The installation frame 3 is symmetrically provided with tie rods 8 on both sides of the cylinder barrel 4. The bottom ends of the two tie rods 8 are fixedly connected with a lower mounting plate 10. As shown in Figure 1 and Figure 5 shown, on each side, the lower mounting plate 10 is connected to the installation frame 3 by arranging two tie rods 8. Of course, other quantities can also be set. Two lower ring oil cylinders 9 are respectively fixedly installed at the bottoms of the two lower mounting plates 10. A piston rod 9a of the lower ring oil cylinder 9 extends upward through the lower mounting plate 10 and is fixedly connected to the upper mounting plate 7. The number of the lower ring oil cylinders 9 can also be greater than two, and the number of the lower mounting plates 10 and the tie rods 8 is adjusted accordingly as long as the above connection relationship is satisfied, so that the lower ring oil cylinders 9 are arranged around the upper ring oil cylinder 6, and their piston rods 9a jointly drive the upper mounting plate 7 to move up and down.

[0035] A lower ring seat 14 connected to a lower ring 12 of the capsule 1 is fixedly installed at the top of the cylinder barrel 4. Refer to Figure 1In the case where the lower ring seat 14 can be provided with threads adapted to the lower ring 12 on the outside, so that the lower ring 12 is threadedly connected to the lower ring seat 14; two through holes 15 are symmetrically provided on the lower ring seat 14. After the capsule 1 is installed, the through holes 15 can communicate with the inner cavity of the capsule 1. The bottom ends of the two through holes 15 are respectively connected with an air inlet conduit 16 and an air outlet conduit 17, so that the air inlet conduit 16 and the air outlet conduit 17 can communicate with the inner cavity of the capsule 1 to control the internal air pressure of the capsule 1 and change its expansion degree. The positions of the air inlet conduit 16 and the air outlet conduit 17 are not limited to Figure 2 the positions shown. The positions of the two can be set in reverse; the top end of the central rod 5 penetrates upward through the lower ring seat 14 and is fixedly installed with a clamping ring 13 connected to the upper ring 11 of the capsule 1, so that the clamping ring 13 is located above the lower ring seat 14. Among them, the upper ring 11 and the clamping ring 13 can be snap-connected, and the clamping ring 13 is fixed to the top end of the central rod 5 by bolts. Through the mutual cooperation between the clamping ring 13 and the lower ring seat 14, the two are respectively connected to the upper ring 11 and the lower ring 12 of the capsule 1 to achieve the function of installing the capsule 1.

[0036] A guide sleeve 18 is sleeved outside the cylinder barrel 4. The guide sleeve 18 is installed through the upper part of the installation frame 3 and the lower hot plate 2, so that the cylinder barrel 4 can pass through the upper part of the installation frame 3 and the lower hot plate 2 and slide up and down along the guide sleeve 18. The moving direction of the cylinder barrel 4 is restricted by the guide sleeve 18 to prevent the overall structure including the upper ring oil cylinder 6, the cylinder barrel 4, the lower ring seat 14, the clamping ring 13, etc. from tilting and shifting during the lifting and moving process; an installation groove 18a for accommodating and supporting the lower ring seat 14 is provided above the guide sleeve 18, so that the lower ring seat 14 can be moved down to the installation groove 18a above the guide sleeve 18 for placement, so that the vulcanization chamber can vulcanize and shape the tire blank placed with the capsule 1 on the lower ring seat 14.

[0037] When using the present utility model, before the vulcanization starts, the corresponding specification capsule 1 is first installed on the central mechanism, as Figure 6 shown, so that the upper ring 11 of the capsule 1 is connected to the clamping ring 13, and the lower ring 12 is connected to the lower ring seat 14. The inner cavity space of the capsule 1 can communicate with the air inlet conduit 16 and the air outlet conduit 17 through the through holes 15 on the lower ring seat 14. When loading the tire, first evacuate the inside of the capsule 1 through the air outlet conduit 17, so that the internal air pressure of the capsule 1 gradually decreases to a vacuum state, as Figure 8 shown, the capsule 1 shrinks, and then it is loaded into the tire blank 70. After the tire loading is completed, the mold is closed and vulcanization starts. The shaping nitrogen is filled into the inner cavity of the capsule 1 from the air inlet conduit 16 along the through holes 15 of the lower ring seat 14, so that the capsule 1 gradually expands until it tightly adheres to the inner surface of the tire blank for shaping.

[0038] After vulcanization is completed, the mold is opened, so that the lower ring cylinders 9 on both sides synchronously drive their piston rods 9a to extend outward. At this time, since the lower ring cylinder 9 is installed in a positive direction, that is, the front end of the lower ring cylinder 9 is installed at the bottom of the lower mounting plate 10, its piston rod 9a penetrates the lower mounting plate 10 upward and is fixedly connected to the upper mounting plate 7. Therefore, when the piston rod 9a is to be extended, refer to Figure 10 , the hydraulic oil will act on the side of the piston without the piston rod below, and the hydraulic oil will push up the piston, so that the piston rod 9a extends out of the cylinder body of the lower ring cylinder 9, driving the upper mounting plate 7 connected to it to move upward. Since the upper mounting plate 7 is fixed to the upper ring cylinder 6 and the cylinder barrel 4, the upper ring cylinder 6 and the cylinder barrel 4 also move upward synchronously with the upper mounting plate 7 as a whole, and the guide sleeve 18 arranged outside the cylinder barrel 4 can guide the cylinder barrel 4 to move upward to avoid a large tilt offset when it moves; the cylinder barrel 4 drives the lower ring seat 14 at its top as a whole When the upper ring cylinder 6 moves upward, the air inlet duct 16 and the air outlet duct 17 connected to the through hole 15 of the lower ring seat 14 also move upward accordingly; when the upper ring cylinder 6 moves upward, the center rod 5 connected to its piston rod 6a moves upward accordingly, and then the clamping ring 13 installed on the top of the center rod 5 also moves upward as a whole; thus, the clamping ring 13 and the lower ring seat 14 also move upward synchronously, so that the upper ring 11 and the lower ring 12 of the capsule connected to the two move in the direction away from the lower hot plate 2, so that the capsule 1 drives the tire to separate from the lower mold and rise to a certain height under high-pressure expansion, waiting for tire unloading.

[0039] After the tire unloading mechanism holds the tire horizontally, the gas in the inner cavity of the capsule 1 is extracted through the air outlet duct 17, so that the air pressure in the capsule 1 is gradually reduced and contracted, the capsule 1 is separated from the inner surface of the tire, and the upper ring cylinder 6 is driven to make the piston rod 6a of the upper ring cylinder 6 extend outward, the piston rod 6a penetrates the upper mounting plate 7 and drives the center rod 5 connected to the end of the piston rod 6a to move upward, and the upward movement of the center rod 5 also drives the clamping ring 13 to move upward, so that the clamping ring 13 drives the upper ring 11 of the capsule 1 to rise independently relative to the lower ring 12, the upper ring 11 is separated from the upper bead of the tire, and the capsule 1 is The distance becomes larger, causing it to further shrink in the horizontal direction, so that it can be vertically separated from the tire along the tire bead; then the piston rod 9a of the lower ring cylinder 9 is contracted into the cylinder body, thereby driving the aforementioned upper ring cylinder 6, cylinder barrel 4, lower ring seat 14, clamping ring 13 and other structures to move downward as a whole, so that the upper ring 11 and the lower ring 12 of the capsule 1 are synchronously moved downward in the direction close to the lower hot plate 2, and the lower ring 12 is separated from the lower tire bead, so that the entire capsule 1 is completely withdrawn from the center of the tire, and the tire remains on the tire unloading mechanism. The capsule 1 descends with the central mechanism and returns to the initial position, waiting for the next tire loading process.

[0040] Since the seals of the cylinders on the central mechanism are prone to damage, the cylinders often need to be disassembled from the central mechanism to replace their seals. The upper ring cylinder 6 is located inside the base of the vulcanizer, where the space is limited. The central rod 5 connected to the piston rod 6a of the upper ring cylinder 6 is arranged inside the cylinder barrel 4, and both the cylinder barrel 4 and the central rod 5 are relatively long, making it inconvenient for the central rod 5 to move along with the movement of the upper ring cylinder 6. For stability requirements, a connection method that is not easy to install and disassemble is usually adopted between the central rod 5 and the piston rod 6a, such as installing pins to prevent rotation, which makes the disassembly and assembly of the upper ring cylinder 6 more difficult. To solve the above problems and save the workload of disassembling and assembling the upper ring cylinder 6, specifically, as Figure 3 shown, the central rod 5 includes an upper central rod 5a, a lower central rod 5b, a clamping sleeve 19, and a sheath 20. Among them, the bottom end of the upper central rod 5a and the top end of the lower central rod 5b both have limiting protrusions 51 and are abutted against each other up and down. A clamping ring 13 is fixedly installed at the top end of the upper central rod 5a, and the bottom end of the lower central rod 5b is fixedly connected to the piston rod 6a of the upper ring cylinder 6 to maintain the original connection relationship of the central rod 5. The clamping sleeve 19 includes two separable clamping parts 19a. The two clamping parts 19a are combined to form a cylindrical clamping sleeve 19. The inner wall of the clamping sleeve 19 is provided with limiting recesses 19b that match the shapes of the limiting protrusions 51 of the upper central rod 5a and the lower central rod 5b, so that the clamping sleeve 19 is adapted to abut against the limiting protrusions 51 of the upper central rod 5a and the lower central rod 5b through the limiting recesses 19b of the two clamping parts 19a, clamping the bottom end of the upper central rod 5a and the top end of the lower central rod 5b together, that is, the inner wall of the clamping sleeve 19 is adapted to abut against the abutting part between the upper central rod 5a and the lower central rod 5b, ensuring that the bottom end of the upper central rod 5a and the top end of the lower central rod 5b can maintain the relationship of abutting against each other up and down. Under the blocking action of the adapted limiting protrusions 51 and limiting recesses 19b, the upper central rod 5a and the lower central rod 5b will not move relative to each other, making the two form an integral body, and the piston rod 6a of the upper ring cylinder 6 drives the two to move up and down as a whole, causing the clamping ring 13 to move up and down accordingly. The sheath 20 is a rotating body, and the sheath 20 is suitably sleeved on the outer wall of the clamping sleeve 19. A pin 21 is provided at the upper part of the sheath 20 to prevent the sheath 20 from sliding relative to the clamping sleeve 19.

[0041] With the above structure, since the central rod 5 is divided into upper and lower sections including the upper central rod 5a and the lower central rod 5b, during installation, the upper central rod 5a and the lower central rod 5b are clamped by the jacket 19 to form an integral body, so that there is no relative movement between the upper central rod 5a and the lower central rod 5b, and it can perform overall lifting and lowering movement under the drive of the piston rod 6a of the upper ring oil cylinder 6. The outer part is fitted with a sheath 20 outside the jacket 19 to prevent the two clamping parts 19a of the jacket 19 from separating and causing the upper and lower central rods to separate. Then, a pin 21 is installed to prevent the sheath 20 from sliding up and down relative to the jacket 19 and disengaging from the jacket 19, thus realizing a structure that facilitates the disassembly and assembly of the upper ring oil cylinder 6 and the central rod 5. When disassembling the upper ring oil cylinder 6, first remove the pin 21 on the upper part of the sheath 20, so that the sheath 20 can leave the jacket 19 upward along the upper central rod 5a, and then separate the two clamping parts 19a of the jacket 19 to separate the upper central rod 5a and the lower central rod 5b. Without disassembling and separating the piston rod 6a of the upper ring oil cylinder 6 from the lower central rod 5b, the upper ring oil cylinder 6 can be conveniently taken out to adapt to the limited disassembly working space inside the vulcanizer base and can be adaptively installed in more working environments; its connection method is simple, the operation is convenient, it is easy to disassemble and install, and it can maintain the driving effect of the piston rod 6a of the upper ring oil cylinder 6 on the central rod 5.

[0042] Refer to Figure 1 、 Figure 6 and Figure 7 As shown, the guide sleeve 18 is provided with a limit bolt 23 that penetrates from its outer wall to its inner wall. The outer wall of the cylinder barrel 4 is provided with a limit slide rail 24 adapted to the limit bolt 23 in the vertical direction. When the guide sleeve 18 is sleeved on the outer wall of the cylinder barrel 4, one end of the limit bolt 23 located on the inner wall of the guide sleeve 18 is adapted to abut against the limit slide rail 24. And when the guide sleeve 18 moves up and down relative to the cylinder barrel 4, the limit bolt 23 slides along the limit slide rail 24 with the guide sleeve 18. The length of the limit slide rail 24 can correspond to the telescopic length range of the piston rod 9a of the lower ring oil cylinder 9. Thus, through the limiting effect of the limit slide rail 24 on the limit bolt 23, it can prevent the cylinder barrel 4 from rotating relative to the guide sleeve 18 during the lifting and lowering movement, avoiding the situation that the lower ring seat 14 fixed at the top of the cylinder barrel 4 rotates and causes a certain angle deflection between the lower ring 12 and the upper ring 11 of the capsule, resulting in the capsule being twisted, and ensuring the quality of the tire during vulcanization and shaping.

[0043] As Figure 1 and Figure 4 shown, a cylinder head 22 is fixedly installed on the top of the lower ring seat 14. The cylinder head 22 is provided with a plurality of diversion air holes 22a opposite to the positions of the through holes 15. The diversion air holes 22a can play a role in guiding the flow, enabling the gas entering and leaving the inner cavity of the capsule along the two conduits and the through holes 15 to be evenly distributed and dispersing the impact of the gas. The setting of its quantity and angle can refer to Figure 4In this case, it is ensured that the gas enters the capsule evenly, so that the capsule is in full close contact with the inner surface of the embryo. A sealed contact is maintained between the cylinder head 22 and the lower ring seat 14 to reduce gas leakage, and the two can also adopt an integral structure to further avoid leakage.

[0044] Refer to Figure 7 , an annular groove 31 is provided on the inner wall of the guide sleeve 18, and a guide belt 32 is installed in the annular groove 31. The number and position of the annular grooves 31 can be set according to actual needs. The guide belt 32 located on the inner wall of the guide sleeve 18 can further provide precise positioning and guiding functions for the cylinder barrel 4 sliding over the guide sleeve 18, ensuring that the cylinder barrel 4 moves smoothly under the guidance of the guide belt 32, and its moving direction will not deviate. Moreover, the guide belt 32 also has characteristics such as wear resistance and low friction, which can reduce the wear between the cylinder barrel 4 and the guide sleeve 18, and reduce the friction force between the cylinder barrel 4 and the guide sleeve 18, making the relative sliding between the two smoother.

[0045] A connecting pipe 25 passes through the guide sleeve 18. As Figure 6 and Figure 7 shown, one end of the connecting pipe 25 close to the guide sleeve 18 is arranged on the inner wall of the guide sleeve 18, and an oil cup 26 is installed at the end of the connecting pipe 25 away from the guide sleeve 18. The oil cup 26 serves as a lubrication device and can be filled with lubricating oil. The oil cup 26 is connected to the inner wall of the guide sleeve 18 through the connecting pipe 25. A certain amount of lubricating oil is added to the oil cup 26 according to the actual situation, so that the lubricating oil can flow along the connecting pipe 25 to the inner cavity with a certain gap between the inner wall of the guide sleeve 18 and the cylinder barrel 4, making the relative sliding between the guide sleeve 18 and the cylinder barrel 4 smoother. Moreover, the lubricating oil also has functions such as anti-corrosion and anti-oxidation, which can reduce corrosion and other damages on the guide sleeve 18 and the cylinder barrel 4, ensure the normal operation of the central mechanism, and is convenient to operate.

[0046] As Figure 1 shown, the guide sleeve 18 is provided with a limit guide hole 18b through which the intake duct 16 and the exhaust duct 17 pass, so that both the intake duct 16 and the exhaust duct 17 can extend downward through the guide sleeve 18 to adapt to more installation situations, and the movement range of the two ducts can be limited by the limit guide hole 18b to avoid large swings of the two ducts during the operation of the central mechanism, so as to ensure the stability of the gas flow in the ducts.

[0047] Furthermore, as Figure 2As shown in the figure, a switch support plate 41 is further provided on the mounting frame 3. A proximity switch 42 is provided on the switch support plate 41. The installation position and quantity of the proximity switch 42 can be adjusted according to actual needs to correspond to different extended lengths of the piston rod 9a of the lower ring cylinder 9. The upper mounting plate 7 is fixedly installed with an induction plate 43 that cooperates with the proximity switch 42. When the piston rod 9a of the lower ring cylinder 9 drives the upper mounting plate 7 to move up and down, the induction plate 43 moves accordingly and can pass through the position where the proximity switch 42 is located and be sensed by the proximity switch 42. The working state of the lower ring cylinder 9 is controlled by a controller electrically connected to the proximity switch 42, so that the lower ring cylinder 9 can drive the upper mounting plate 7 to move up and down to the required position, so that the capsule and the tire carried by it can reach a suitable position for corresponding operations. Through the cooperation of the induction plate 43 and the proximity switch 42, the proximity switch 42 provides a corresponding control instruction to the controller after being triggered by induction to control the telescopic movement range of the piston rod 9a of the lower ring cylinder 9, so that the up and down movement range of the tire is accurately adjustable, its action is reliable, its performance is stable, and its frequency response is fast.

[0048] In addition, a linear displacement sensor 44 is installed at the bottom of the upper ring cylinder 6 to measure the extended length of the piston rod 6a of the upper ring cylinder 6. The linear displacement sensor 44 controls the working state of the upper ring cylinder 6 through a controller electrically connected to it, so as to adjust the telescopic movement range of the piston rod 6a of the upper ring cylinder 6, ensuring that the distance between the upper ring 11 and the lower ring 12 of the capsule is accurately adjustable, with accurate measurement and good reliability.

[0049] As another aspect of the present invention, a tire vulcanizer is provided, including a vulcanization chamber and a capsule 1. The capsule 1 includes an upper ring 11 and a lower ring 12 connected thereto. The above-mentioned tire vulcanizer central mechanism is provided on the vulcanization chamber. The capsule 1 is installed on the tire vulcanizer central mechanism. Among them, the upper ring 11 of the capsule 1 is fixedly connected to the clamping ring 13 of the central mechanism, and the lower ring 12 of the capsule 1 is fixedly connected to the lower ring seat 14 of the central mechanism. The clamping ring 13 and the lower ring seat 14 can cooperate with each other to perform corresponding vulcanization and shaping operations. The mounting frame 3 is installed together with the lower hot plate 2, so that the central mechanism and the lower hot plate 2 form an integral structure. A heat insulation plate 60 is further provided between the upper surface of the mounting frame 3 and the lower hot plate 2 to achieve the effect of heat preservation and insulation, ensure the effect of the tire vulcanizer on vulcanizing and shaping the tire, guarantee the processing quality of the product, and has a simple structure and can save costs. In addition, two of the above-mentioned central mechanisms can be symmetrically distributed along the left and right on the vulcanization chamber. The capsules 1 are installed on both central mechanisms in the above-mentioned manner, so that the central mechanisms on both sides can perform corresponding vulcanization and shaping operations to improve the processing efficiency of the vulcanizer.

[0050] In summary, for the central mechanism of the tire vulcanizer and the tire vulcanizer provided by the present utility model, by symmetrically arranging tie rods 8 on both sides of the installation frame 3, the bottom end of the tie rod 8 is connected with a lower mounting plate 10 for fixedly installing the lower ring cylinder 9, so that the lower ring cylinder 9 can be installed forward, that is, the front end of the lower ring cylinder 9 is installed at the bottom of the lower mounting plate 10, so that the piston rod 9a of the lower ring cylinder 9 can extend upward. And the upper mounting plate 7 is fixedly installed between the cylinder barrel 4 and the upper ring cylinder 6, so that the piston rod 9a of the lower ring cylinder 9 penetrates upward through the lower mounting plate 10 and is fixedly connected with the upper mounting plate 7. In the above structure, referring to Figure 10 , since the piston rod 9a faces upward, when the bladder 1 is lifted, the piston rod 9a needs to extend out of the cylinder block. At this time, the hydraulic oil in the lower ring cylinder 9 will act on the side of the piston without the piston rod below it, and the piston will be pushed up by the hydraulic oil. The piston rod 9a of the lower ring cylinder 9 can extend upward to drive the upper mounting plate 7 to move upward, and then make the upper ring cylinder 6, two conduits, cylinder barrel 4, lower ring seat 14, clamping ring 13, etc. rise along the guide sleeve 18 as a whole, so that the bladder 1 drives the tire to move upward away from the lower mold. Compared with Figure 9 the existing installation structure of the oil cylinder, when the lower ring cylinder 9 drives the tire to rise, the acting area of the hydraulic oil on the piston is larger, so that the central structure can generate a large enough thrust to drive the tire to rise. Therefore, a lower ring cylinder 9 with a relatively small cylinder diameter can be adaptively used, the cylinder diameter of the lower ring cylinder is reduced, while ensuring the original working efficiency, the cost required for the lower ring cylinder 9 can be saved, and the structure is more compact, reducing the occupied space, so that it can be adapted to more installation positions and is more convenient for loading and unloading; and, after the lower ring cylinder 9 is installed forward, as Figure 1 and Figure 2 shown, the distance between the piston rod 9a of the lower ring cylinder 9 and the upper mounting plate 7 connected thereto and the guide sleeve 18 can be made smaller. The position of the upper mounting plate 7 is between the cylinder barrel 4 and the upper ring cylinder 6 that move as a whole, closer to the vulcanization chamber, and the cylinder barrel 4 can rise under the guidance of the guide sleeve 18, so that the central mechanism can reduce the situation of excessive left and right swing amplitude and tilting deviation during the lifting process, improve the stability, the central mechanism can remain stable during the lifting process, and ensure the centering during the shaping vulcanization, so as to meet the requirements of the perpendicularity between the central mechanism and the upper surface of the lower hot plate and the coaxiality with the center of the tire unloading mechanism, so as to ensure the quality of the tire during the vulcanization process including large-size tires and the subsequent tire unloading work, and different specifications of tires can be vulcanized according to different process requirements, with better adaptability and meeting more usage requirements.

[0051] The above are only some embodiments of the present utility model, and the protection scope of the present utility model is not limited thereby. Although the present utility model has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements on some or all of the technical features; and these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present utility model, and they should all be covered by the scope of the claims and the description of the present utility model. Therefore, those skilled in the art making non-substantive changes or replacements based on the present utility model still fall within the protection scope of the present utility model.

Claims

1. A central mechanism of a tire vulcanizer, characterized in that, It includes a mounting frame (3) provided at the bottom of the lower hot plate (2) of the vulcanizing chamber. A cylinder barrel (4) is vertically arranged inside the mounting frame (3). A central rod (5) is arranged inside the cylinder barrel (4). The bottom of the cylinder barrel (4) is fixedly installed with an upper mounting plate (7). The bottom of the upper mounting plate (7) is fixedly installed with an upper ring oil cylinder (6). The end of the piston rod of the upper ring oil cylinder (6) extending out of the cylinder body penetrates upward through the upper mounting plate (7) and is fixedly connected to the bottom end of the central rod (5) inside the cylinder barrel (4). On both sides of the cylinder barrel (4) of the mounting frame (3), tie rods (8) are symmetrically arranged. The bottom ends of the tie rods (8) on both sides are fixedly connected with lower mounting plates (10). Two lower ring oil cylinders (9) are respectively fixedly installed at the bottoms of the two lower mounting plates (10). The end of the piston rod of the lower ring oil cylinder (9) extending out of the cylinder body penetrates upward through the lower mounting plate (10) and is fixedly connected to the upper mounting plate (7). The top of the cylinder barrel (4) is fixedly installed with a lower ring seat (14) connected to the lower ring (12) of the capsule (1). Two through holes (15) are symmetrically arranged on the lower ring seat (14). The bottom ends of the two through holes (15) are respectively connected with an air inlet conduit (16) and an air outlet conduit (17). The top end of the central rod (5) penetrates upward through the lower ring seat (14) and is fixedly installed with a clamping ring (13) connected to the upper ring (11) of the capsule (1). A guide sleeve (18) is sleeved outside the cylinder barrel (4). The guide sleeve (18) is installed through the upper part of the mounting frame (3) and the lower hot plate (2). An installation groove (18a) for accommodating and supporting the lower ring seat (14) is arranged above the guide sleeve (18).

2. The central mechanism of a tire vulcanizer according to claim 1, characterized in that, The central rod (5) includes an upper central rod (5a), a lower central rod (5b), a clamping sleeve (19) and a sheath (20). The bottom end of the upper central rod (5a) and the top end of the lower central rod (5b) both have limit bumps (51) and are abutted against each other up and down. The top end of the upper central rod (5a) is fixedly installed with the clamping ring (13). The bottom end of the lower central rod (5b) is fixedly connected to the piston rod of the upper ring oil cylinder (6). The clamping sleeve (19) includes two separable clamping parts (19a). The two clamping parts (19a) are combined to form a cylindrical clamping sleeve (19). The inner wall of the clamping sleeve (19) is provided with limit recesses (19b) matching the shapes of the limit bumps (51) of the upper central rod (5a) and the lower central rod (5b), so that the clamping sleeve (19) clamps and buckles the bottom end of the upper central rod (5a) and the top end of the lower central rod (5b) through the two clamping parts (19a). The sheath (20) is sleeved on the outer wall of the clamping sleeve (19). A pin (21) for preventing the sheath (20) from sliding relative to the clamping sleeve (19) is arranged at the upper part of the sheath (20).

3. The central mechanism of a tire vulcanizing machine according to claim 1, characterized in that, The guide sleeve (18) is provided with a limiting bolt (23) which passes through its inner wall from its outer wall, and the outer wall of the cylinder barrel (4) is provided with a limiting slide rail (24) which is adapted to the limiting bolt (23) in the vertical direction. When the guide sleeve (18) is sleeved on the outer wall of the cylinder barrel (4), one end of the limiting bolt (23) located on the inner wall of the guide sleeve (18) is adapted to abut against the limiting slide rail (24), and when the guide sleeve (18) moves up and down relative to the cylinder barrel (4), the limiting bolt (23) slides along the limiting slide rail (24) along with the guide sleeve (18).

4. A center mechanism of a tire vulcanizer according to claim 1, characterized in that, A cylinder cover (22) is fixedly mounted on the top of the lower ring seat (14), and the cylinder cover (22) is provided with a plurality of air guide holes (22a) located opposite to the through holes (15).

5. The central mechanism of a tire vulcanizer according to claim 1, characterized in that An annular groove (31) is provided on the inner wall of the guide sleeve (18), and a guide belt (32) is installed in the annular groove (31).

6. The central mechanism of a tire vulcanizer according to claim 1, characterized in that, The guide sleeve (18) is provided with a connecting pipe (25), one end of the connecting pipe (25) close to the guide sleeve (18) is arranged on the inner wall of the guide sleeve (18), and the end of the connecting pipe (25) away from the guide sleeve (18) is installed with an oil cup (26).

7. A central mechanism of a tire vulcanizer according to claim 1, characterized in that, The guide sleeve (18) is provided with a limiting guide hole (18b) through which the air inlet conduit (16) and the air outlet conduit (17) pass.

8. A central mechanism of a tire vulcanizing machine according to claim 1, characterized in that, The mounting frame (3) is also provided with a switch support plate (41), on which a proximity switch (42) is provided. The upper mounting plate (7) is fixedly provided with a sensing plate (43) that cooperates with the proximity switch (42). When the piston rod of the lower ring oil cylinder (9) drives the upper mounting plate (7) to move up and down, the sensing plate (43) moves accordingly and can pass through the position where the proximity switch (42) is located and sense the proximity switch (42). The working state of the lower ring oil cylinder (9) is controlled by a controller electrically connected to the proximity switch (42).

9. A central mechanism of a tire vulcanizer according to claim 1, characterized in that, A linear displacement sensor (44) is installed at the bottom of the upper ring cylinder (6), and the linear displacement sensor (44) controls the working state of the upper ring cylinder (6) through a controller electrically connected thereto.

10. A tire vulcanizer, comprising a vulcanization chamber and a bladder (1), wherein the bladder (1) comprises an upper ring (11) and a lower ring (12) connected thereto, characterized in that, The vulcanization chamber is provided with a tire vulcanizer central mechanism as described in any one of claims 1 to 9, and the bladder (1) is installed on the tire vulcanizer central mechanism, wherein the upper ring (11) of the bladder (1) is fixedly connected to the clamping ring (13) of the central mechanism, and the lower ring (12) of the bladder (1) is fixedly connected to the lower ring seat (14) of the central mechanism.

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