A central agency

Abstract

The present invention discloses a central mechanism, which belongs to the field of tire mold technology and includes a ring seat, a lower steel ring and a lower clamping power assembly, wherein the lower clamping power assembly drives the ring seat and the lower steel ring to move in the up and down directions; the clamping cylinder is also included, and the clamping cylinder is sleeved on the outer side of the ring seat, and a capsule clamping cavity is formed between the inner side of the upper end of the clamping cylinder and the ring seat; the clamping cylinder is floatingly connected to the lower steel ring, and the ring seat can float downward relative to the lower steel ring during tire vulcanization, so that the ring seat is always under the stable support of the lower ring cylinder; the internal pressure generated by the capsule on the central mechanism is always offset by the reaction force applied to the lower steel ring by the lower ring cylinder and the template, the lower steel ring is subjected to little force and can work stably for a long time, which solves the problem in the prior art that the lower ring cylinder is easily damaged due to inaccurate positioning of the lower ring cylinder due to the characteristics of the cylinder.

Description

Technical Field

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

[0002] The bladder is a tool used in tire vulcanization. During the vulcanization process, it is filled with compressed air, steam, or superheated water, causing it to expand and prop up the tire embryo to form a vulcanized tire. On the tire vulcanization equipment, the bladder is clamped at both ends by a central mechanism. For example, patent publication number CN207359443U discloses a tire vulcanization bladder chuck structure. This bladder clamps the lower bladder base of the bladder with a lower chuck and a lower steel ring, providing clamping force when the bladder is clamped.

[0003] In the current RIB center mechanism, the ring seat is connected to the lower steel ring. Driven by a hydraulic cylinder, the lower steel ring moves up and down in tandem with the center mechanism, enabling the lower steel ring to engage and disengage with the mold. During tire curing, the internal pressure of the bladder is 2.0-2.9 MPa, which exerts downward pressure on the center mechanism. This pressure is offset by the reaction force generated by the lower steel ring's mating position with the mold and the lower ring cylinder. However, due to the operating characteristics of the hydraulic cylinder, it is difficult to maintain the lower ring cylinder in the same position during each curing cycle. Due to factors such as oil leakage, the cylinder rod of the lower ring cylinder can move downward, causing the lower ring cylinder support to fail during tire curing. The downward pressure exerted by the bladder on the center mechanism is completely offset by the reaction force of the lower steel ring's mating position with the mold. Due to structural reasons, the strength of the lower steel ring's mating position with the ring seat is insufficient to withstand the enormous forces, ultimately causing deformation and damage to the lower steel ring. Summary of the Invention

[0004] In order to solve the problems existing in the prior art, the present invention provides a central mechanism, which effectively improves the stress environment of the lower steel ring and prevents the lower steel ring from being damaged by huge internal forces.

[0005] In order to achieve the above object, the technical solution adopted by the present invention is as follows:

[0006] The present invention provides a central mechanism, comprising a ring seat, a lower steel ring, and a lower clamping power assembly, wherein the lower clamping power assembly drives the ring seat and the lower steel ring to move in the up and down directions; and further comprising a clamping cylinder, wherein the clamping cylinder is sleeved on the outer side of the ring seat, and a capsule clamping cavity is formed between the inner side of the upper end of the clamping cylinder and the ring seat.

[0007] It also includes a floating connection assembly, which includes an elastic element. The elastic element cooperates with the clamping cylinder so that the ring seat can float downward relative to the lower steel rim only during the tire vulcanization process, and the lower steel rim and the ring seat rise and fall synchronously during the tire pushing process.

[0008] In the above-mentioned central mechanism, it also includes a capsule clamping power assembly for driving the clamping cylinder up and down to realize the clamping and loosening action of the lower clamping edge of the capsule; the capsule clamping power assembly includes a capsule clamping drive element, a connecting plate and a transmission rod, the connecting plate connects the clamping cylinder and the transmission rod, and the transmission rod is connected to the capsule clamping drive element.

[0009] In the above-mentioned central mechanism, the clamping cylinder includes a capsule clamping cylinder inner ring and a capsule clamping cylinder outer ring; the inner side wall of the upper end of the capsule clamping cylinder inner ring and the ring seat form the capsule clamping edge clamping cavity; the capsule clamping cylinder outer ring is slidably sleeved on the outer side of the capsule clamping cylinder inner ring, and the capsule clamping cylinder outer ring is connected to the lower steel ring and rises and falls synchronously;

[0010] The elastic element is a first elastic element, and the first elastic element is placed between the inner ring of the capsule clamping cylinder and the outer ring of the capsule clamping cylinder;

[0011] Driven by the lower clamping power assembly, the ring seat, the inner ring of the capsule clamping cylinder, the outer ring of the capsule clamping cylinder and the lower steel ring rise and fall synchronously; when the tire is vulcanized, the first elastic element can produce elastic deformation, so that the inner ring of the capsule clamping cylinder moves downward relative to the outer ring of the capsule clamping cylinder.

[0012] In the above-mentioned central mechanism, the inner side wall of the outer ring of the capsule clamping cylinder is convex inward to form a first supporting surface facing upward, and the inner ring of the capsule clamping cylinder is convex outward to form a second supporting surface facing downward;

[0013] The first elastic element is a spring, and the first elastic element extends up and down, with two ends of the first elastic element respectively resting on the first supporting surface and the second supporting surface.

[0014] In the above-mentioned central mechanism, a lower spring hole is provided on the first supporting surface, and the lower end of the first elastic element is located in the lower spring hole;

[0015] And / or, an upper spring hole is provided on the second supporting surface, and the upper end of the first elastic element is located in the upper spring hole;

[0016] And / or, a guide rod is provided inside the first elastic element;

[0017] And / or, the first elastic element is in a compressed state, exerting upward and downward forces on the capsule clamping cylinder inner ring and the capsule clamping cylinder outer ring respectively.

[0018] In the above-mentioned central mechanism, the outer wall of the clamping cylinder and the inner wall of the lower steel ring are connected by a staggered tooth connection structure; the staggered tooth connection structure includes a first protrusion provided on the outer wall of the clamping cylinder and a second protrusion provided on the inner wall of the lower steel ring;

[0019] The elastic element is a second elastic element, which is disposed between the first protrusion and the second protrusion and applies upward and downward thrusts on the first protrusion and the second protrusion respectively.

[0020] In the above-mentioned central mechanism, an elastic cavity is provided in the clamping cylinder or the lower steel ring; the second elastic element is installed in the elastic cavity and can be retracted into the elastic cavity to avoid when the first protrusion and the second protrusion rotate relative to each other and are engaged.

[0021] In the above-mentioned central mechanism, the clamping cylinder includes a ring seat connector and a steel ring connector. The inner side surface of the upper end of the ring seat connector cooperates with the ring seat to form the capsule clamping cavity; the steel ring connector is fixedly installed on the outer side of the ring seat connector, and a floating connection platform protruding radially outward is provided on the outer side wall of the steel ring connector.

[0022] A floating groove is provided on the inner side wall of the lower steel ring, and the floating connecting platform extends into the floating groove, and the two can move relative to each other in the vertical direction;

[0023] The elastic element is a third elastic element, which is located between the floating connection platform and the floating groove and applies an upward force on the floating connection platform.

[0024] In the above-mentioned central mechanism, the third elastic element is located below the floating connection platform;

[0025] And / or, the third elastic element is a spring;

[0026] And / or, the lower steel ring includes a steel ring body and a connecting pressure plate; the connecting pressure plate is located on the upper side of the steel ring body, and the floating groove is formed between the two.

[0027] The beneficial effects of the present invention are as follows:

[0028] The central mechanism utilizes a floating connection between the clamping cylinder and the lower steel ring, allowing the ring seat and the lower steel ring to rise and fall synchronously during the tire pushing operation. When the support position of the lower ring cylinder on the ring seat moves downward, the floating connection between the clamping cylinder and the lower steel ring allows the ring seat to move downward relative to the lower steel ring, ensuring that the ring seat is always stably supported by the lower ring cylinder. The internal pressure generated by the bladder on the central mechanism is always offset by the reaction force exerted on the lower steel ring by the lower ring cylinder and the template. The lower steel ring is subjected to little force and can operate stably for a long time, solving the problem in the prior art of the cylinder's characteristics, which can easily cause damage to the lower steel ring due to inaccurate positioning of the lower ring cylinder. At the same time, due to the floating connection between the lower steel ring and the clamping cylinder, when the lower steel ring descends and approaches the template and contacts the template, the lower steel ring and the template are in non-rigid contact, which also avoids contact wear between the template and the lower steel ring, thereby improving the service life of the vulcanizing equipment.

[0029] The floating connection assembly further improves the controllability of the floating connection between the clamping cylinder and the lower steel rim. The floating connection assembly maintains the synchronous lifting and lowering of the lower steel rim and the ring seat during the tire pushing operation. After the lower steel rim contacts the template, the downward force applied by the floating connection assembly on the lower steel rim can prompt the lower steel rim and the template to fit into place, ensuring the matching accuracy of the lower steel rim and the template.

[0030] The capsule clamping power assembly drives the clamping cylinder to achieve capsule clamping or releasing operations. The operation is simple and flexible, which greatly reduces the operation time of capsule replacement and reduces the impact on tire vulcanization production.

[0031] The connecting plate serves as an intermediate body and connects the clamping cylinder and the transmission rod at the same time, which not only simplifies the structure of the clamping cylinder, but also ensures that the multiple capsule clamping drive elements drive the clamping cylinder stably, avoiding the tilt of the clamping cylinder caused by asynchronous control.

[0032] The ring seat guide sleeve guides the cylinder, transmission rod and clamping tube to improve movement stability and ensure production quality.

[0033] The clamping cylinder includes a capsule clamping cylinder inner ring and a capsule clamping cylinder outer ring. The first elastic element is placed between the capsule clamping cylinder inner ring and the capsule clamping cylinder outer ring. The capsule clamping cylinder inner ring is connected to the ring seat to form a capsule clamping edge clamping cavity and the two are lifted and lowered synchronously. The capsule clamping cylinder outer ring is connected to the lower steel ring and lifted and lowered synchronously, making the clamping cylinder structure compact and the assembly structure simple.

[0034] The outer ring of the capsule clamping tube is provided with a first supporting surface, and the inner ring of the capsule clamping tube is provided with a second supporting surface. The first supporting surface and the second supporting surface provide connection surfaces for the installation of the elastic element. The outer ring of the capsule clamping tube and the inner ring of the capsule clamping tube have a reasonable structure, high strength, and occupy a small assembly space.

[0035] The provision of the guide rod can not only maintain the controllable deformation of the first elastic element, but also guide the relative movement of the outer ring of the capsule clamping cylinder and the inner ring of the capsule clamping cylinder.

[0036] The various floating connection solutions for the clamping cylinder and the lower steel ring provided are simple in structure and highly practical, and are conducive to promotion and application on existing equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] Figure 1 This is a schematic diagram of the overall structure of a central mechanism of the present invention;

[0038] Figure 2 It is a structural diagram of the ring seat guide sleeve;

[0039] Figure 3 Schematic diagram of the assembly structure of the lower support plate and the lower hot plate;

[0040] Figure 4 It is a structural diagram of the first embodiment of the central mechanism;

[0041] Figure 5 This is a schematic structural diagram of the clamping cylinder in the first embodiment of the central mechanism;

[0042] Figure 6 This is a schematic structural diagram of the lower steel ring in the first embodiment of the central mechanism;

[0043] Figure 7 This is a schematic structural diagram of the outer ring of the capsule clamping cylinder in the first embodiment of the central mechanism;

[0044] Figure 8 It is a structural diagram of the second embodiment of the central mechanism;

[0045] Figure 9 for Figure 8 A partial enlarged view of

[0046] Figure 10 This is a structural diagram of a second embodiment of the center mechanism in which the second elastic element adopts a ball plunger;

[0047] Figure 11 This is a structural diagram of a second embodiment of the central mechanism in which the second elastic element adopts an elastic sheet;

[0048] Figure 12 This is a structural diagram of the third embodiment of the central mechanism.

[0049] In the picture:

[0050] 100-tire mold; 110-lower support plate; 111-through hole; 112-step surface; 120-lower hot plate; 130-template; 140-connecting rod; 150-lower ring cylinder seat;

[0051] 200-upper clamping power assembly; 210-center rod; 220-upper ring cylinder;

[0052] 300-lower clamping power assembly; 310-lower ring cylinder; 320-support seat; 330-cylinder barrel;

[0053] 400-capsule clamp edge clamps the cavity; 500-ring seat;

[0054] 600 - lower steel ring; 610 - second protrusion; 620 - second slot; 630 - second through slot; 640 - steel ring body; 641 - floating slot; 650 - connecting pressure plate;

[0055] 700 - capsule clamping power assembly; 710 - capsule clamping drive element; 720 - transmission rod; 730 - connecting plate; 740 - ring seat guide sleeve; 741 - upper guide sleeve; 742 - limit platform; 743 - second guide hole; 744 - lower guide sleeve; 745 - first guide hole; 746 - guide plate; 747 - third guide hole;

[0056] 800 - clamping cylinder; 810 - capsule clamping cylinder inner ring; 811 - second support surface; 812 - upper spring hole; 813 - upper guide rod hole; 814 - bolt connection hole; 815 - clamping surface; 820 - capsule clamping cylinder outer ring; 821 - first support surface; 822 - lower spring hole; 823 - first clamping slot; 824 - first through slot; 825 - first protrusion; 830 - ring seat connector; 840 - steel ring connector; 841 - floating connection platform;

[0057] 900 - floating connection assembly; 910 - first elastic element; 920 - guide rod; 930 - second elastic element; 931 - main ring body; 932 - elastic claw; 933 - guide slope; 940 - elastic cavity; 950 - third elastic element. DETAILED DESCRIPTION

[0058] To facilitate understanding by those skilled in the art, the present invention is further described below with reference to the accompanying drawings.

[0059] like Figure 1 As shown, the central mechanism cooperates with the tire mold 100 to jointly realize the tire vulcanization operation. The tire mold 100 includes a template 130 and a lower support plate 110 arranged upper and lower. As needed, a lower hot plate 120 can also be set between the template 130 and the lower support plate 110. Mounting holes are correspondingly set in the middle of the template 130, the lower support plate 110 and the lower hot plate 120, and the central mechanism is located in the mounting hole. The central mechanism includes an upper clamping assembly and a lower clamping assembly, which clamp the upper and lower ends of the capsule respectively. Figure 1-6As shown, the lower clamping assembly includes a ring seat 500, a lower steel ring 600, and a lower clamping power assembly 300; the lower steel ring 600 is located radially outward from the ring seat 500, and the two are synchronously raised and lowered by the drive of the lower clamping power assembly 300. The upper clamping assembly includes an upper clamping power assembly 200 and an upper chuck, etc. The upper clamping power assembly 200 includes a center rod 210 and an upper ring cylinder 220, etc. The ring seat 500 is provided with a center hole, and the center rod 210 is slidably disposed in the center hole. The upper ring cylinder 220 is located on the lower side of the ring seat 500 and is used to drive the center rod 210 to move up and down. The upper clamping assembly is prior art and has not been improved in this application, so it will not be described in detail here.

[0060] The lower clamping power assembly 300 includes a lower ring cylinder 310, which is fixedly connected to the lower support plate 110 or the frame. For example, a lower ring cylinder seat 150 is provided on the underside of the lower support plate 110, and the lower support plate 110 and the lower ring cylinder seat 150 are connected by a number of connecting rods 140. The lower ring cylinder 310 is fixedly mounted on the lower ring cylinder seat 150. A support seat 320 is provided on the upper side of the lower ring cylinder seat 150. This support seat 320 is connected to the piston rod of the lower ring cylinder 310, allowing it to be raised and lowered by the lower ring cylinder 310. The support seat 320 is connected to the ring seat 500 via a cylinder barrel 330, with the support seat 320 fixedly connected to the lower end of the cylinder barrel 330 and the ring seat 500 fixedly connected to the upper end of the cylinder barrel 330. The movement of the lower ring cylinder 310 is transmitted to the cylinder barrel 330, causing the ring seat 500 to rise and fall.

[0061] In order to overcome the stress problem of the lower steel ring 600 in the prior art, the central mechanism of the present technical solution also includes a clamping cylinder 800, which is sleeved on the outside of the ring seat 500, and a capsule clamping edge clamping cavity 400 is formed between the inner side of the upper end of the clamping cylinder 800 and the ring seat 500. The clamping cylinder 800 is floatingly connected to the lower steel ring 600. When the lower ring oil cylinder 310 drives the ring seat 500 to rise and fall for the tire pushing operation, the lower steel ring 600, the clamping cylinder 800 and the ring seat 500 are synchronously lifted and lowered to complete the tire pushing and resetting action; when the tire is vulcanized, that is, after the lower steel ring 600 contacts the template 130, if the lower ring oil cylinder 310 drives the ring seat 500 to rise and fall ... The cylinder 310 moves downward from its actual supporting position for the ring seat 500 due to leakage or other reasons. The ring seat 500 can move downward by a certain distance relative to the lower steel ring 600, so that the lower ring cylinder 310 always effectively supports the ring seat 500, thereby ensuring that the pressure inside the capsule is still offset by the joint reaction force of the lower ring cylinder 310 and the lower steel ring 600, rather than being entirely offset by the reaction force of the matching position of the template 130 and the lower steel ring 600. This improves and optimizes the stress environment of the lower steel ring 600, and the lower steel ring 600 no longer has to bear the high pressure inside the capsule alone, thereby greatly increasing its service life.

[0062] The clamping cylinder 800 is detachably connected to the ring seat 500 to facilitate the replacement of the capsule. Figure 1As shown, the central mechanism is provided with a capsule clamping power assembly 700, which drives the clamping cylinder 800 to clamp the capsule upward or release the capsule downward.

[0063] The capsule clamping power assembly 700 includes a capsule clamping drive element 710 and a transmission rod 720. The transmission rod 720 connects the clamping cylinder 800 and the capsule clamping drive element 710. The capsule clamping drive element 710 is fixedly mounted on the support base 320 and rises and falls synchronously with the support base 320. The capsule clamping drive element 710 is preferably a hydraulic cylinder, and there are preferably multiple capsule clamping drive elements 710. The multiple capsule clamping drive elements 710 are spaced apart around the circumference of the clamping cylinder 800 and operate simultaneously to drive the clamping cylinder 800 to clamp and release the lower clamping edge of the capsule, facilitating capsule replacement.

[0064] Furthermore, the capsule clamping power assembly 700 includes a connecting plate 730 , which is located between the clamping cylinder 800 and the transmission rod 720 . The connecting plate 730 simultaneously connects the clamping cylinder 800 and several transmission rods 720 to ensure that multiple capsule clamping drive elements 710 synchronously drive the clamping cylinder 800 .

[0065] Furthermore, the central mechanism is further provided with a ring seat guide sleeve 740, which is connected to the lower support plate 110 to guide the cylinder 330 and the transmission rod 720. For example, Figure 2 and Figure 3 As shown, the ring seat guide sleeve 740 includes an upper guide sleeve 741 and a lower guide sleeve 744. The inner diameter of the upper guide sleeve 741 is larger than that of the lower guide sleeve 744. The butted ends of the upper guide sleeve 741 and the lower guide sleeve 744 are connected by a guide plate 746, and the three are fixed together as a whole. Preferably, the upper guide sleeve 741, the lower guide sleeve 744, and the guide plate 746 are a one-piece structure. The inner cavity of the lower guide sleeve 744 forms a first guide hole 745, the cross-sectional shape of which matches the outer shape of the cylinder 330. The guide plate 746 is provided with a plurality of second guide holes 743, which guide the up and down movement of the transmission rod 720. The inner cavity of the upper guide sleeve 741 forms a third guide hole 747, which guides the up and down movement of the clamping cylinder 800. The outer wall of the upper guide sleeve 741 is provided with a radially outwardly extending limit plate 742, which is clamped and fixed between the lower support plate 110 and the template 130 or the lower hot plate 120 located above the lower support plate 110. Preferably, the through hole 111 in the middle of the lower support plate 110 is a stepped hole, which is larger at the top and smaller at the bottom, forming an upward stepped surface 112. The ring seat guide sleeve 740 is in the through hole 111, and the lower side surface of the limit platform 742 cooperates and fits tightly with the stepped surface 112, and the upper side surface is flush with the upper side surface of the lower support plate 110.

[0066] The cylinder 330 and the support base 320 are also provided with a center hole, and the center rod 210 is slidably provided in the cylinder 330 and the support base 320 .

[0067] Because the clamping cylinder 800 and the lower steel rim 600 have vertical floating capacity, the lower steel rim 600 relies on its own gravity to force the mating surfaces of the two to mate when mating with the template 130, resulting in unstable mating quality. To overcome this problem, the central mechanism further includes a floating connection assembly 900. The clamping cylinder 800 and the floating connection assembly 900 cooperate to achieve a floating connection between the clamping cylinder 800 and the lower steel rim 600, allowing the ring seat 500 to move downward a certain distance relative to the lower steel rim 600 only when the support position of the lower ring cylinder 310 on the ring seat 500 is lower than the set position during tire vulcanization. During tire pushing, the floating connection assembly 900 ensures that the lower steel rim 600 and the ring seat 500 move synchronously, making the lifting and lowering of the lower steel rim 600 controllable and highly precise. Based on the different structures of the clamping cylinder 800, the floating connection assembly 900 also varies.

[0068] Please refer to Figure 1 、 Figure 4 and Figure 5 , which is the first embodiment of the central mechanism provided by the present invention; the clamping cylinder 800 includes a capsule clamping cylinder inner ring 810 and a capsule clamping cylinder outer ring 820, and the capsule clamping cylinder inner ring 810 and the capsule clamping cylinder outer ring 820 are both cylindrical structures with openings at both ends.

[0069] The inner sidewall of the upper end of the capsule clamping tube inner ring 810 and the ring seat 500 form a capsule clamping edge clamping cavity 400. The ring seat 500 and the capsule clamping tube inner ring 810 cooperate to clamp the capsule. For example, an upward-facing clamping surface 815 is formed on the inner sidewall of the capsule clamping tube inner ring 810. The clamping surface 815 cooperates with a radially outwardly protruding clamping platform on the ring seat 500 to clamp the lower end of the capsule. After the capsule is clamped, the capsule clamping tube inner ring 810 and the ring seat 500 remain clamped. That is, as the ring seat 500 rises and falls, the capsule clamping tube inner ring 810 also rises and falls. The capsule clamping tube inner ring 810 and the ring seat 500 are only separated when replacing the capsule. It is reflected in that the inner ring 810 of the capsule clamping cylinder is fixedly connected to the inner side of the upper part of the connecting plate 730; for example, a bolt connection hole 814 is set at the lower end of the inner ring 810 of the capsule clamping cylinder, and an assembly hole is correspondingly set on the connecting plate 730, and the bolt passes through the assembly hole from bottom to top and is threadedly connected to the bolt connection hole 814.

[0070] The capsule clamping tube outer ring 820 is mounted on the outer side of the capsule clamping tube inner ring 810. The connecting plate 730 is supported at the lower end of the capsule clamping tube outer ring 820. The outer wall of the capsule clamping tube inner ring 810 slides with the inner wall of the capsule clamping tube outer ring 820, allowing the capsule clamping tube outer ring 820 to slide upward relative to the capsule clamping tube inner ring 810 and the connecting plate 730. Simultaneously, the capsule clamping tube outer ring 820 is connected to the lower steel ring 600, and the two rise and fall synchronously. During the tire vulcanization process, the ring seat 500 and the capsule clamping tube inner ring 810 can float downward relative to the lower steel ring 600 and the capsule clamping tube outer ring 820. During the tire pushing operation, the capsule clamping tube outer ring 820, supported and lifted by the connecting plate 730, rises and falls together with the capsule clamping tube inner ring 810 and the ring seat 500. If a connecting plate 730 is not provided between the clamping cylinder 800 and the transmission rod 720, the transmission rod 720 may be used to support the lower side of the capsule clamping cylinder outer ring 820; or other support schemes may be adopted to achieve sliding cooperation between the capsule clamping cylinder inner ring 810 and the capsule clamping cylinder outer ring 820 and synchronous lifting and lowering driven by the lower ring cylinder 310.

[0071] Preferably, the floating connection assembly 900 includes a first elastic element 910 disposed between the capsule clamping tube inner ring 810 and the capsule clamping tube outer ring 820. The first elastic element 910 applies upward and downward forces to the capsule clamping tube inner ring 810 and the capsule clamping tube outer ring 820, respectively. The arrangement of the first elastic element 910 allows the capsule clamping tube inner ring 810 to float downward relative to the capsule clamping tube outer ring 820 and the lower steel ring 600 after the lower steel ring 600 contacts the template 130. In other words, after the lower steel ring 600 contacts the template 130, the lower steel ring 600 cannot continue to move downward due to the limitation of the template 130. Accordingly, the outer ring 820 of the capsule clamping cylinder fixedly connected to the lower steel ring 600 cannot move downward either; when the actual support position of the lower ring oil cylinder 310 during vulcanization is lower than the set support position, the inner ring 810 of the capsule clamping cylinder moves downward accordingly. Within the elastic deformation range of the first elastic element 910, the first elastic element 910 is compressed while the outer ring 820 of the capsule clamping cylinder and the lower steel ring 600 remain stationary.

[0072] According to the different magnitudes of the reaction force to be provided, a plurality of first elastic elements 910 are arranged around the capsule clamping cylinder inner ring 810 and the capsule clamping cylinder outer ring 820 .

[0073] Preferably, the first elastic element 910 is always in a compressed state, ensuring that the lower end of the capsule clamping tube outer ring 820 maintains effective contact with the connecting plate 730. This allows the lower steel ring 600 and the ring seat 500 to rise and fall synchronously after the tire is vulcanized to facilitate tire pushing and assist in separating the tire from the bladder. Because the first elastic element 910 constantly exerts a downward force on the capsule clamping tube outer ring 820, the lower steel ring 600 can be precisely and stably connected to the mating surface of the template 130 in a controlled manner.

[0074] As a preferred embodiment of the capsule clamping cylinder inner ring 810 and the capsule clamping cylinder outer ring 820, as Figure 5 As shown, the inner side wall of the outer ring 820 of the capsule clamping cylinder bulges inward to form a first support surface 821, and the first support surface 821 faces upward; the inner ring 810 of the capsule clamping cylinder bulges outward to form a second support surface 811, and the second support surface 811 faces downward; the second support surface 811 is higher than the first support surface 821, and the first elastic element 910 is arranged between the first support surface 821 and the second support surface 811.

[0075] Preferably, the first supporting surface 821 and the second supporting surface 811 overlap radially. The first elastic element 910 is a spring. The first elastic element 910 extends up and down with both ends respectively resting on the first supporting surface 821 and the second supporting surface 811 .

[0076] Furthermore, a lower spring hole 822 is provided on the first supporting surface 821 , and an upper spring hole 812 is provided on the second supporting surface 811 . Both ends of the first elastic element 910 are respectively located in the lower spring hole 822 and the upper spring hole 811 .

[0077] Preferably, the floating connection assembly 900 further includes a guide rod 920, which is disposed within the first elastic element 910 and serves to position and guide the first elastic element. An upper guide rod hole 813 is disposed within the upper spring hole 812. The lower end of the guide rod 920 is disposed within the lower spring hole 822, while the upper end passes through the upper spring hole 812 and extends into the upper guide rod hole 813. It is understood that a lower guide rod hole may also be disposed within the lower spring hole 822. The guide rod 920 does not affect the relative floating of the capsule clamping cylinder inner ring 810 and the capsule clamping cylinder outer ring 820 in the vertical direction.

[0078] The lower end of the capsule clamping tube outer ring 820 is located in the third guide hole 747 of the ring seat guide sleeve 740 and can slide in the up and down directions relative to the third guide hole 747.

[0079] The capsule clamping tube outer ring 820 and the lower steel ring 600 can be connected by threads or by the following method: Figure 4 For example, the staggered tooth connection structure of the capsule clamping tube outer ring 820 and the lower steel ring 600 is as shown in FIG. Figure 6 and Figure 7As shown, the structure includes a plurality of first protrusions 825 disposed on the outer side wall of the upper end of the capsule clamping cylinder outer ring 820. The first protrusions 825 protrude radially outward from the outer side wall of the capsule clamping cylinder outer ring 820. The plurality of first protrusions 825 are spaced apart circumferentially around the capsule clamping cylinder outer ring 820. The staggered tooth connection structure also includes a second retaining groove 620 disposed at the lower end of the inner side wall of the lower steel ring 600. The lower side wall of the second retaining groove 620 is provided with a plurality of second through grooves 630. The plurality of second through grooves 630 are spaced apart circumferentially around the lower steel ring 600, thereby forming a second protrusion 610 between two adjacent second through grooves 630. The first protrusion 825, the second protrusion 610 and the second slot 620 corresponding to their positions are the actual clamping and positioning parts. Axially, the upper side walls of the second protrusion 610 and the second slot 620 are respectively located on the lower side and the upper side of the first protrusion 825. Therefore, when the outer ring 820 of the capsule clamping cylinder descends, the first protrusion 825 exerts a downward force on the second protrusion 610, driving the lower steel ring 600 to descend synchronously; when the outer ring 820 of the capsule clamping cylinder ascends, the first protrusion 825 exerts an upward thrust on the upper side wall of the second slot 620, pushing the lower steel ring 600 to ascend synchronously.

[0080] Preferably, a first slot 823 is provided on the outer sidewall of the upper end of the capsule clamping cylinder outer ring 820. The upper sidewall of the first slot 823 is provided with a plurality of first through slots 824. These first through slots 824 are spaced apart circumferentially around the capsule clamping cylinder outer ring 820, with a first protrusion 825 formed between two adjacent first through slots 824. The second protrusion 610 is located within the first slot 823, between the first protrusion 825 and the lower sidewall of the first slot 823. The provision of the first slot 823 eliminates the need for the first protrusion 825 to extend beyond the outer sidewall of the capsule clamping cylinder outer ring 820, thereby reducing the radial dimension of the capsule clamping cylinder outer ring 820.

[0081] The first through-slot 824 and the second through-slot 630 provide assembly operating conditions for the assembly process. When assembling the lower steel ring 600 with the capsule clamping tube outer ring 820, first align the lower steel ring 600 with the capsule clamping tube outer ring 820, with the first protrusion 825 corresponding to the second through-slot 630 and the second protrusion 610 corresponding to the first through-slot 824. Then, the lower steel ring 600 and the capsule clamping tube outer ring 820 are axially moved and inserted into each other. When the first protrusion 825 is completely inserted into the second retaining groove 620 and the second protrusion 610 is completely inserted into the first retaining groove 823, the lower steel ring 600 and the capsule clamping tube outer ring 820 are rotated relative to each other so that the first protrusion 825 and the second protrusion 610 are aligned, completing the assembly of the capsule clamping tube outer ring 820 and the lower steel ring 600.

[0082] When in use, the lower steel ring 600 is connected to the outer ring 820 of the capsule clamping cylinder, and the outer ring 820 of the capsule clamping cylinder and the inner ring 810 of the capsule clamping cylinder are elastically matched through the first elastic element 910; when the lower ring oil cylinder 310 moves up and down, it drives the lower steel ring 600 to move up and down to realize tire pushing related actions; when the lower steel ring 600 is fully matched with the template 130 and enters the vulcanization state, if the lower ring oil cylinder 310 causes the hydraulic rod to move downward due to oil leakage, oil pressure characteristics and other reasons, under the action of internal pressure, the ring seat 500, the inner ring 810 of the capsule clamping cylinder, the connecting plate 730, the transmission rod 720, the capsule clamping drive element 710, the cylinder 330, and the support seat 320 move downward at the same time. At this time, the first elastic element 910 is compressed, so that the lower ring oil cylinder 310 always stably supports the ring seat 500, and the positions of the outer ring 820 of the capsule clamping cylinder and the lower steel ring 600 remain unchanged. The force borne by the joint between the capsule clamping tube outer ring 820 and the lower steel ring 600 is the compression force of the first elastic element 910, not the huge pressure generated by the internal pressure. The structure of the first elastic element 910 acts as a buffer to avoid damage to the lower steel ring 600.

[0083] Please refer to Figure 8 and Figure 9 This is the second embodiment of the central mechanism provided by the present invention. Unlike the first embodiment, the clamping cylinder 800 is a one-piece structure, with its lower end fixedly connected to the connecting plate 730. The inner sidewall of its upper end cooperates with the ring seat 500 to form a capsule clamping edge clamping cavity 400 for holding the capsule. The outer sidewall is connected to the lower steel ring 600 via a staggered tooth connection structure. The staggered tooth connection structure can refer to the staggered tooth connection structure between the capsule clamping cylinder outer ring 820 and the lower steel ring 600 in the first embodiment. The floating connection assembly 900 includes a second elastic element 930, which is disposed between the first protrusion 825 of the clamping cylinder 800 and the second protrusion 610 of the lower steel ring 600, exerting upward and downward forces on the first protrusion 825 and the second protrusion 610, respectively.

[0084] Since the first protrusion 825 and the second protrusion 610 need to rotate relative to each other and snap into place during the assembly process, in order to meet the assembly requirements of the clamping cylinder 800 and the lower steel ring 600, the second elastic element 930 can be elastically and floatingly disposed within the first protrusion 825 or the second protrusion 610, and can be avoided when the first protrusion 825 and the second protrusion 610 rotate relative to each other and snap into place. For example, an elastic cavity 940 is machined within the first protrusion 825 or the second protrusion 610, and the second elastic element 930 can be a plug body that is telescopically disposed within the elastic cavity 940. When the plug body extends out of the elastic cavity 940, the outer end of the plug body abuts against the first protrusion 825 or the second protrusion 610. Before assembling the clamping cylinder 800 and the lower steel ring 600, the plug body is pre-installed in the elastic cavity 940 without injecting gas or liquid into the elastic cavity 940; after the first protrusion 825 and the second protrusion 610 are snapped into place, gas or liquid is injected into the elastic cavity 940 and sealed, so that the plug body is pushed against the first protrusion 825 or the second protrusion 610 by the pressure of the compressed gas or liquid and can float up and down within a certain range. Alternatively, Figure 10 As shown, the second elastic element 930 is a ball plunger, which is installed in the elastic cavity 940. The ball head of the ball plunger can extend out of the elastic cavity 940 and abut against the first protrusion 825 or the second protrusion 610. However, when the first protrusion 825 or the second protrusion 610 rotates relative to each other and is engaged, the ball head can be retracted into the elastic cavity 940 without affecting the circumferential relative rotation of the two.

[0085] Or, as Figure 11 As shown, the second elastic element 930 is an elastic sheet, which is located between the first protrusion 825 and the second protrusion 610. The elastic sheet includes a main ring body 931, which has an opening on its circumference to facilitate installation on the clamping cylinder 800 or the lower steel ring 600. A number of radially and axially extending elastic claws 932 are provided on the inner or outer wall of the main ring body 931. If the main ring body 931 is sleeved on the outside of the clamping tube 800 and is below the first protrusion 825, the elastic claws 932 are set at the outer edge of the main ring body 931 and extend radially outward and downward, resting on the upper side of the second protrusion 610, and the elastic claws 932 are used to apply elastic force on the first protrusion 825 and the second protrusion 610; if the main ring body 931 is placed in the second card groove 620 on the inner wall of the lower steel ring 600, the radially extending elastic claw 932 extends upward away from the end of the main ring body 931 and rests on the lower side of the first protrusion 825. In order to facilitate the engagement of the first protrusion 825 and the second protrusion 610, guiding slopes 933 are provided at both ends of the elastic claw 932 in the circumferential direction; in order to ensure that the elastic claw 932 is located between the first protrusion 825 and the second protrusion 610, the main ring body 931 is preferably fixed on the clamping cylinder 800 or the lower steel ring 600.

[0086] Please refer to Figure 12In the third embodiment of the central mechanism provided by the present invention, the clamping cylinder 800 includes a ring seat connector 830 and a steel ring connector 840. The ring seat connector 830 is connected to the capsule clamping power assembly 700 and is raised and lowered under the drive of the capsule clamping power assembly 700. For example, the lower end of the ring seat connector 830 is fixedly connected to the connecting plate 730. The inner surface of the upper end of the ring seat connector 830 cooperates with the ring seat 500 to form the capsule clamping cavity 400. The ring seat connector 830 and the ring seat 500 cooperate to clamp the capsule.

[0087] The steel ring connector 840 is located outside the upper end of the ring seat connector 830; the ring seat connector 830 and the steel ring connector 840 can be an integral structure, or they can be assembled and fixed as a whole by threaded connection or staggered tooth connection structure, and rise and fall synchronously; the staggered tooth connection structure can refer to the staggered tooth connection structure of the capsule clamping cylinder outer ring 820 and the lower steel ring 600 in Example 1. For example, Figure 12 As shown, the ring seat connector 830 and the steel ring connector 840 are split structures and are connected by a staggered tooth connection structure.

[0088] The outer wall of the steel ring connector 840 is provided with a radially outwardly projecting floating connection platform 841. The inner wall of the lower steel ring 600 is provided with a floating groove 641. The floating connection platform 841 corresponds to the floating groove 641 and extends into the floating groove 641. The width of the floating groove 641 is greater than the thickness of the floating connection platform 841, allowing a certain amount of vertical movement between the two. The floating connection assembly 900 includes a third elastic element 950, which is positioned between the floating connection platform 841 and the floating groove 641. The third elastic element 950 exerts an upward elastic force on the floating connection platform 841, maintaining the synchronous lifting and lowering of the steel ring connector 840 and the lower steel ring 600. After the lower steel ring 600 contacts the template 130, the steel ring connector 840 can float downward relative to the lower steel ring 600.

[0089] Preferably, the third elastic element 950 is located below the floating connection platform 841; the third elastic element 950 can be a spring.

[0090] To facilitate assembly and processing, the lower steel ring 600 includes a steel ring body 640 and a connecting pressure plate 650. The inner side wall of the steel ring body 640 is provided with two upward-facing stepped surfaces, namely a first stepped surface located at the bottom and a second stepped surface located at the top. The third elastic element 950 is provided between the first stepped surface and the floating connecting platform 841. The connecting pressure plate 650 is fixed to the second stepped surface and is detachably connected to the second stepped surface by bolts or other connecting parts. Of course, it can also be fixed by welding. The upper side surface of the connecting pressure plate 650 is flush with the upper side surface of the lower steel ring 600 to ensure that the molding surface of the lower steel ring 600 is intact.

[0091] The foregoing description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Those skilled in the art will readily appreciate that various modifications and variations of the present invention are possible. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention are intended to be within the scope of protection of the present invention.

Claims

1. A central mechanism comprising a ring seat (500), a lower steel ring (600) and a lower clamping power assembly (300), wherein the lower clamping power assembly (300) drives the ring seat (500) and the lower steel ring (600) to move in an up-down direction; characterized in that: It also includes a clamping cylinder (800), the clamping cylinder (800) being sleeved on the outside of the ring seat (500), and forming a capsule clamping edge clamping cavity (400) between the inner side of the upper end of the clamping cylinder (800) and the ring seat (500); The invention also includes a floating connection assembly (900), wherein the floating connection assembly (900) includes an elastic element, and the elastic element cooperates with the clamping cylinder (800) so that the ring seat (500) can float downward relative to the lower steel ring (600) only during the tire vulcanization process, and the lower steel ring (600) and the ring seat (500) rise and fall synchronously during the tire pushing process.

2. A central mechanism according to claim 1, characterized in that: It also includes a capsule clamping power assembly (700) for driving the clamping cylinder (800) up and down to achieve the clamping and loosening action of the lower clamping edge of the capsule; the capsule clamping power assembly (700) includes a capsule clamping drive element (710), a connecting plate (730) and a transmission rod (720), the connecting plate (730) connects the clamping cylinder (800) and the transmission rod (720), and the transmission rod (720) is connected to the capsule clamping drive element (710).

3. A central mechanism according to claim 1, characterized in that: The clamping cylinder (800) comprises a capsule clamping cylinder inner ring (810) and a capsule clamping cylinder outer ring (820); the inner side wall of the upper end of the capsule clamping cylinder inner ring (810) and the ring seat (500) form the capsule clamping edge clamping cavity (400); the capsule clamping cylinder outer ring (820) is slidably mounted on the outer side of the capsule clamping cylinder inner ring (810), and the capsule clamping cylinder outer ring (820) is connected to the lower steel ring (600) and rises and falls synchronously; The elastic element is a first elastic element (910), and the first elastic element (910) is arranged between the capsule clamping cylinder inner ring (810) and the capsule clamping cylinder outer ring (820); Driven by the lower clamping power assembly (300), the ring seat (500), the capsule clamping tube inner ring (810), the capsule clamping tube outer ring (820) and the lower steel ring (600) are synchronously lifted and lowered; when the tire is vulcanized, the first elastic element (910) can generate elastic deformation, so that the capsule clamping tube inner ring (810) moves downward relative to the capsule clamping tube outer ring (820).

4. A central mechanism according to claim 3, characterized in that: The inner side wall of the capsule clamping cylinder outer ring (820) is convex inwardly to form an upward first supporting surface (821), and the inner side wall of the capsule clamping cylinder inner ring (810) is convex outwardly to form a downward second supporting surface (811); The first elastic element (910) is a spring, and the first elastic element (910) extends up and down, with two ends respectively resting on the first supporting surface (821) and the second supporting surface (811).

5. A central mechanism according to claim 4, characterized in that: A lower spring hole (822) is provided on the first supporting surface (821), and the lower end of the first elastic element (910) is located in the lower spring hole (822); And / or, an upper spring hole (812) is provided on the second supporting surface (811), and the upper end of the first elastic element (910) is located in the upper spring hole (812); And / or, a guide rod (920) is provided inside the first elastic element (910); And / or, the first elastic element (910) is in a compressed state, exerting upward and downward forces on the capsule clamping cylinder inner ring (810) and the capsule clamping cylinder outer ring (820), respectively.

6. A central mechanism according to claim 1, characterized in that: The outer wall of the clamping cylinder (800) and the inner wall of the lower steel ring (600) are connected via a staggered tooth connection structure; the staggered tooth connection structure comprises a first protrusion (825) provided on the outer wall of the clamping cylinder (800) and a second protrusion (610) provided on the inner wall of the lower steel ring (600); The elastic element is a second elastic element (930), and the second elastic element (930) is arranged between the first protrusion (825) and the second protrusion (610), and applies upward and downward thrusts on the first protrusion (825) and the second protrusion (610), respectively.

7. A central mechanism according to claim 6, characterized in that: An elastic cavity (940) is provided in the clamping cylinder (800) or the lower steel ring (600); the second elastic element (930) is installed in the elastic cavity (940) and can be retracted into the elastic cavity (940) to avoid when the first protrusion (825) and the second protrusion (610) rotate relative to each other and are engaged.

8. A central mechanism according to claim 1, characterized in that: The clamping cylinder (800) includes a ring seat connector (830) and a steel ring connector (840), wherein the inner side surface of the upper end of the ring seat connector (830) cooperates with the ring seat (500) to form the capsule clamp edge clamping cavity (400); the steel ring connector (840) is fixedly mounted on the outside of the ring seat connector (830), and a floating connection platform (841) protruding radially outward is provided on the outer side wall of the steel ring connector (840); A floating groove (641) is provided on the inner side wall of the lower steel ring (600), and the floating connecting platform (841) extends into the floating groove (641), and the two can move relative to each other in the vertical direction; The elastic element is a third elastic element (950), and the third elastic element (950) is located between the floating connection platform (841) and the floating groove (641), and applies an upward force on the floating connection platform (841).

9. A central mechanism according to claim 8, characterized in that: The third elastic element (950) is located below the floating connection platform (841); And / or, the third elastic element (950) is a spring; And / or, the lower steel ring (600) includes a steel ring body (640) and a connecting pressure plate (650); the connecting pressure plate (650) is located on the upper side of the steel ring body (640), and the floating groove (641) is formed between the two.

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