Tire forming machine bead clamping device
By improving the tire bead clamping device of the forming machine, adopting an X-shaped clamping mechanism and synchronous belt drive, the tire bead can be fully clamped, solving the problem of unstable tire width and flatness, and improving the quality of tire products.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- HENAN TIANJI TIRE CO LTD
- Filing Date
- 2025-08-01
- Publication Date
- 2026-07-31
AI Technical Summary
Existing tire bead clamping devices in tire forming machines cannot fully clamp the tire bead, resulting in unstable tire width and flatness, which affects tire product quality.
A tire bead clamping device including an X-shaped clamping mechanism was designed. It employs four sets of clamping mechanisms to clamp the inner side of the core hole. Each set of clamping mechanisms is driven by a linear slide rail, a transmission gear, a clamping cylinder, and a synchronous belt, which can reliably clamp both the inner and outer sides of the tire bead to ensure that the tire bead does not deform.
It improves the flatness and width stability during the tire forming process, ensures the accuracy of the tire aspect ratio, and enhances the quality of tire products.
Smart Images
Figure CN224576236U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the field of tire production technology, specifically relating to a tire bead clamping device for a tire forming machine with stable tire width and shape. Background Technology
[0002] Tires are mainly composed of an airtight layer, inner rubber layer, ply layer, steel belt layer, bead, sidewall, sidewall rubber, shoulder, shoulder pad rubber, crown, and tread rubber. The bead itself consists of bead wires, bead wrapping, and a triangular rubber layer between the filler and the bead wrapping. The ratio of the tire's section height to its section width is called the aspect ratio, a crucial parameter for tire products. The tire forming machine, the main equipment in the tire forming process, is key to ensuring the tire's aspect ratio. Existing forming machines suffer from incomplete bead clamping (clamping only the outer triangular rubber portion and not the inner steel wire portion), leading to unstable tire aspect ratio and consequently, inconsistent aspect ratio accuracy in the finished tire, affecting product quality. Therefore, it is essential to improve and refine the bead clamping device of the forming machine. Utility Model Content
[0003] In response to the above situation, this utility model provides a tire bead clamping device for a tire forming machine that stabilizes tire width and flatness. It improves upon the existing tire bead clamping device for forming machines and can form a more reliable clamping of the tire bead.
[0004] To achieve the above objectives, the present invention adopts the following technical solution:
[0005] A tire bead clamping device for a tire forming machine with stable tire width and shape includes a clamping mechanism housing of the forming machine, with a circular clamping core hole through the center of the housing. The inner side of the clamping core hole is provided with four sets of clamping mechanisms for clamping the tire bead in an X-shape.
[0006] Each clamping mechanism includes a tire bead clamping assembly and a telescopic sliding arm assembly. The telescopic sliding arm assembly includes a linear slide rail that can slide and extend radially along the clamping core hole, and a transmission rack fixedly disposed on one side edge of the linear slide rail. The middle part of the linear slide rail is slidably connected to the clamping mechanism housing through a slide rail guide seat. A transmission gear for driving the linear slide rail to slide and extend is engaged on one side of the tail of each transmission rack. The transmission gear is rotatably connected to the clamping mechanism housing. A synchronous drive assembly for driving each transmission gear to rotate synchronously is disposed inside the clamping mechanism housing.
[0007] The bead clamping assembly includes a passive clamping part disposed at the head of the linear slide rail and an active clamping assembly disposed on the outside of the linear slide rail. The active clamping assembly includes a clamping lever. An extended lip is disposed on the side of the passive clamping part near the outer side of the bead. A clamping lip is disposed on the clamping lever. The clamping lip and the extended lip cooperate with each other to effectively clamp the bead wire portion inside the bead and the triangular rubber portion outside the bead.
[0008] The extended lip is detachably and fixedly connected to the top of the passive clamping part by a wedge-shaped pressure plate and a locking screw. The top of the passive clamping part is provided with a locking internal thread hole.
[0009] The active clamping assembly also includes a clamping cylinder. The clamping lever is an L-shaped lever structure, and its tail end is rotatably hinged to the linear slide rail via a fulcrum pin. The head of the clamping lever is provided with an active clamping part. The clamping lip is fixedly connected to the active clamping part on the side near the inner side of the tire bead. The middle bend of the clamping lever is rotatably hinged to the top of the piston rod of the clamping cylinder via a joint hinge seat. The clamping cylinder is connected to the linear slide rail via a connecting seat.
[0010] The synchronous drive assembly includes an annular synchronous belt and a drive cylinder. The outer ends of the four transmission gears are all coaxially fixed to synchronous pulleys. The annular synchronous belt is circulated between the four synchronous pulleys. A push block is fixedly arranged in the middle of the annular synchronous belt. A drive cylinder is installed on the upper part of the clamping mechanism housing. The top end of the piston rod of the drive cylinder is connected to the push block.
[0011] Each of the four synchronous pulleys is equipped with an auxiliary guide pulley between each pair, which works in conjunction with the synchronous pulleys to help spread the annular synchronous belt. Furthermore, auxiliary directional pulleys are also provided between the synchronous pulleys and the auxiliary guide pulleys on both sides of the push block. These auxiliary directional pulleys are at the same height as their nearest auxiliary guide pulleys, providing horizontal support for a section of the annular synchronous belt between them. Correspondingly, the annular synchronous belt is a double-toothed synchronous belt, the drive cylinder is horizontally positioned, and the push block can drive the annular synchronous belt to perform horizontal pushing and pulling movements.
[0012] The linear slide rail is provided with guide rollers on both sides to limit the extension and retraction direction of the linear slide rail. The center of each guide roller is rotatably connected to the corresponding slide rail guide seat through a spindle. Each slide rail guide seat is fixedly connected to the housing of the clamping mechanism.
[0013] This utility model also includes other components that enable its normal use, all of which are conventional means in the field. In addition, any devices or components not limited in this utility model adopt the prior art in the field.
[0014] The beneficial effects of this utility model are as follows:
[0015] This utility model provides a tire bead clamping device for a tire forming machine that stabilizes tire width and profile. By improving the existing tire bead clamping device, it can form a more reliable clamping of the tire bead, prevent tire bead deformation during tire forming, improve tire width and profile stability, ensure the accuracy of tire aspect ratio, and help improve tire product quality. Attached Figure Description
[0016] Figure 1 This is a schematic diagram of the overall structure of the tire bead clamping device of the tire forming machine for stabilizing tire width in the embodiment.
[0017] Figure 2 for Figure 1 A partial structural diagram of the clamping mechanism along the AA direction.
[0018] Figure 3 for Figure 2 A magnified structural diagram at point B in the middle. Detailed Implementation
[0019] The technical solution of this utility model will be clearly and completely described below with reference to specific embodiments. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments.
[0020] It should be noted that the terms "upper," "lower," "front," "back," "inner," and "outer," which indicate direction or positional relationship, are based on the attached drawings and are used only for ease of description.
[0021] Example
[0022] like Figure 1 As shown, a tire bead clamping device for a tire forming machine with stable flatness and width includes a clamping mechanism housing 1 of the forming machine, with a circular clamping core hole 2 penetrating through its center. Four sets of clamping mechanisms for clamping the tire bead are arranged circumferentially in an X-shape on the inner side of the clamping core hole. The clamping mechanism housing and clamping core hole of the forming machine are existing technologies for forming machines and will not be described in detail here.
[0023] like Figure 2-3 As shown, each clamping mechanism includes a tire bead clamping assembly and a telescopic sliding arm assembly; the telescopic sliding arm assembly includes a linear slide rail 3 that can slide and extend radially along the clamping core hole, and a transmission rack 4 fixedly disposed on one side edge of the linear slide rail; the middle part of the linear slide rail is slidably connected to the clamping mechanism housing through a slide rail guide seat 5.
[0024] Each of the transmission racks has a transmission gear 6 meshing on one side of its tail end for driving the linear slide rail to slide and extend. The transmission gear is rotatably connected to the clamping mechanism housing. The clamping mechanism housing is provided with a synchronous drive assembly for driving each of the transmission gears to rotate synchronously.
[0025] The bead clamping assembly includes a passive clamping part disposed at the head of the linear slide rail and an active clamping assembly disposed on the outside of the linear slide rail. The active clamping assembly includes a clamping lever 7. An extended lip 8 is disposed on the side of the passive clamping part near the outer side of the bead. A clamping lip 9 is welded onto the clamping lever.
[0026] Because the passive clamping part of the original bead clamping assembly is relatively short, it can only clamp the triangular rubber part 101 of the bead, but cannot reach the bead wire part 102. Therefore, it is difficult to ensure that the bead does not deform during the bead clamping and forming process, and thus it is difficult to ensure the flatness and width stability of the tire forming. By adding an extension lip and a clamping lip, the effective clamping length of the active and passive clamping parts of the bead clamping assembly is effectively increased. This is sufficient for the clamping lip and the extension lip to work together to effectively clamp both the bead wire part inside the bead and the triangular rubber part outside the bead, ensuring that the bead does not deform and the flatness and width stability of the tire is maintained.
[0027] The extended lip is detachably and fixedly connected to the top of the passive clamping part by a wedge-shaped pressure plate 10 and a locking screw 11. The locking screw is a countersunk screw. The wedge-shaped pressure plate has a countersunk through hole in the middle for the locking screw to pass through. The top of the passive clamping part has a locking internal thread hole.
[0028] The active clamping assembly also includes a clamping cylinder 12. The clamping lever is an L-shaped lever structure, with its tail end rotatably hinged to the linear slide rail via a fulcrum pin 13. The head of the clamping lever is provided with an active clamping part. The clamping lip is fixedly connected to the active clamping part on the side near the inner side of the tire bead. The middle bend of the clamping lever is rotatably hinged to the top of the piston rod of the clamping cylinder via a connector hinge seat 14. The clamping cylinder is connected to the linear slide rail via a connecting seat 15. The pushing and pulling action of the clamping cylinder can drive the bend of the clamping lever to make a limited arc movement around the fulcrum pin, thereby causing the clamping lip of the active clamping part of the clamping lever head and the extended lip of the passive clamping part of the linear slide rail to open and close, thus achieving clamping or releasing of the inner and outer sides of the tire bead.
[0029] The synchronous drive assembly includes an annular synchronous belt 16 and a drive cylinder 17. The outer ends of the four transmission gears are all coaxially fixed with synchronous pulleys 18. The annular synchronous belt is circulated between the four synchronous pulleys. A push block 19 is fixedly arranged in the middle of the annular synchronous belt. A drive cylinder is installed on the upper part of the clamping mechanism housing. The top end of the piston rod of the drive cylinder is connected to the push block.
[0030] Each pair of the four synchronous pulleys is provided with an auxiliary guide wheel 20, which works in conjunction with each synchronous pulley to help spread the annular synchronous belt. Furthermore, auxiliary directional pulleys 21 are provided between the synchronous pulleys and auxiliary guide wheels on both sides of the push block. These auxiliary directional pulleys are at the same height as their nearest auxiliary guide wheels, providing horizontal support for a section of the annular synchronous belt between them. Correspondingly, the annular synchronous belt is a double-toothed synchronous belt. The drive cylinder is horizontally positioned, and the push block can drive the annular synchronous belt to perform horizontal pushing and pulling movements, thereby driving the transmission gears to rotate. This, in turn, drives the transmission racks to move the linear slide rails in a sliding and telescopic motion toward or away from the center of the clamping hole.
[0031] The linear slide rail is provided with guide rollers 22 on both sides to limit the extension and retraction direction of the linear slide rail. The center of each guide roller is rotatably connected to the corresponding slide rail guide seat through a spindle 23. Each slide rail guide seat is fixedly connected to the clamping mechanism housing.
[0032] The side of the clamping mechanism housing is also provided with a forming drum mechanism 100 of the forming machine. The clamping mechanism housing moves back and forth along the axial direction of the forming drum mechanism. The clamping core hole can be coaxially sleeved on the outer periphery of the forming drum mechanism or gradually moved away from it. The forming drum mechanism of the forming machine and the axial movement mechanism of the clamping mechanism housing are both existing technologies of forming machines, and will not be described in detail here.
[0033] During tire forming, the tire bead component is first placed in the center of the clamping mandrel of the forming machine. Then, the bead needs to be clamped. The four clamping mechanisms of the telescopic sliding arm assembly are driven by the synchronous drive assembly to synchronously retract toward the center of the clamping mandrel to the designated position. Then, the active and passive clamping parts of the bead clamping assembly are controlled to clamp the bead component. Then, the clamping mandrel of the clamping mechanism housing can be moved and fitted onto the outer periphery of the forming drum mechanism, and then the tire forming operation can begin.
[0034] The technical solution of this utility model is not limited to the specific embodiments described above. Without departing from the scope and spirit of the described embodiments, many modifications and changes will be obvious to those skilled in the art. Any technical modifications made within the spirit and principles of this utility model shall fall within the protection scope of this utility model.
Claims
1. A tire bead clamping device for a tire forming machine with stable flatness and width, comprising a clamping mechanism housing of the forming machine, wherein a circular clamping core hole is provided through the center of the housing, and four sets of clamping mechanisms for clamping the tire bead are arranged circumferentially in an X-shape on the inner side of the clamping core hole, characterized in that: Each clamping mechanism includes a bead clamping assembly and a telescopic sliding arm assembly. The telescopic sliding arm assembly includes a linear slide rail that can slide and extend radially along the clamping core hole, and a transmission rack fixedly disposed on one side edge of the linear slide rail. The middle part of the linear slide rail is slidably connected to the clamping mechanism housing through a slide rail guide seat. A transmission gear for driving the linear slide rail to slide and extend is engaged on one side of the tail of each transmission rack. The transmission gear is rotatably connected to the clamping mechanism housing. A synchronous drive assembly for driving each transmission gear to rotate synchronously is disposed inside the clamping mechanism housing. The bead clamping assembly includes a passive clamping part disposed at the head of the linear slide rail and an active clamping assembly disposed on the outside of the linear slide rail. The active clamping assembly includes a clamping lever. An extended lip is disposed on the side of the passive clamping part near the outer side of the bead. A clamping lip is disposed on the clamping lever. The clamping lip and the extended lip cooperate to effectively clamp the bead wire part inside the bead and the triangular rubber part outside the bead.
2. The bead clamping device of claim 1, wherein: the bead clamping device is a tire forming machine bead clamping device. The extended lip is detachably and fixedly connected to the top of the passive clamping part by a wedge-shaped pressure plate and a locking screw.
3. The bead clamping device of claim 1, wherein: the bead clamping device is a tire forming machine bead clamping device. The active clamping assembly also includes a clamping cylinder. The clamping lever is an L-shaped lever structure, and its tail end is rotatably hinged to the linear slide rail via a fulcrum pin. The head of the clamping lever is provided with an active clamping part. The clamping lip is fixedly connected to the active clamping part on the side near the inner side of the tire bead. The middle bend of the clamping lever is rotatably hinged to the top of the piston rod of the clamping cylinder via a joint hinge seat. The clamping cylinder is connected to the linear slide rail via a connecting seat.
4. The bead clamping device of claim 1, wherein: the bead clamping device is a tire forming machine bead clamping device. The synchronous drive assembly includes an annular synchronous belt and a drive cylinder. The outer ends of the four transmission gears are all coaxially fixed to synchronous pulleys. The annular synchronous belt is circulated between the four synchronous pulleys. A push block is fixedly arranged in the middle of the annular synchronous belt. A drive cylinder is installed on the upper part of the clamping mechanism housing. The top end of the piston rod of the drive cylinder is connected to the push block.
5. The bead clamping device of claim 4, wherein: the bead clamping device is a tire building machine. Each of the four synchronous pulleys is equipped with an auxiliary guide wheel between each pair, which works in conjunction with each synchronous pulley to help spread the annular synchronous belt.
6. The bead clamping device of claim 1, wherein: the bead clamping device is a tire forming machine bead clamping device. The linear slide rail is provided with guide rollers on both sides to limit the extension and retraction direction of the linear slide rail. The center of each guide roller is rotatably connected to the corresponding slide rail guide seat through a spindle. Each slide rail guide seat is fixedly connected to the housing of the clamping mechanism.