Tire bead presetting device

Abstract

The present invention discloses a tire bead presetting device, which includes a fixed frame body, a sliding plate, a movable arm, an expansion and contraction clamping mechanism and a driving mechanism that spans vertically above a bed; the sliding plate is slidably connected to the fixed frame body; there are two movable arms that are symmetrically arranged on both sides of the lower end of the sliding plate; there are two expansion and contraction clamping mechanisms that are respectively used to support the left bead and the right bead, and the two expansion and contraction clamping mechanisms are installed on the outside of the two movable arms in a one-to-one correspondence; the driving mechanism is used to drive the sliding plate to move longitudinally, so that the two expansion and contraction clamping mechanisms can be in a coaxial position with the left steel ring and the right presetting ring respectively. The present invention can place the bead during the operator's free time without occupying the cycle time, and can also retain the middle ring of the carcass tube transfer ring to ensure the quality of the tire.

Description

Technical Field

[0001] The invention relates to the field of rubber machinery, in particular to a tire bead presetting device. Background Art

[0002] With the continuous development of my country's highway and transportation industries, all-steel radial truck tire building machines, as one of the most important equipment for manufacturing all-steel radial truck tires, have achieved great development. The equipment currently used in the market includes two-drum, three-drum, and four-drum building machines. The development of the two-drum building machine has stagnated due to its low efficiency. The four-drum building machine has high efficiency, but the price is also several times that of the three-drum building machine. Although the three-drum building machine has made breakthroughs in production quality and efficiency, its production efficiency is still lower than that of the four-drum building machine, and its automation level is still to be further improved compared to the semi-steel building machine. Therefore, it is necessary to make major improvements and innovations in the forming process and forming equipment of all-steel radial truck tires. It has become an urgent need in the current market to develop an efficient three-drum building machine with high production efficiency, good quality of formed tire blanks, high automation level, and excellent cost performance.

[0003] The all-steel load-bearing radial tire one-step forming machine used for radial tire forming in rubber industrial machinery mainly consists of the following six parts: forming system, feeding system, work-in-progress transmission system, calibration system, tire unloading system and operating system. The tire bead is an important component of the all-steel radial tire. An all-steel radial tire contains two left and right tire beads (wire rings). On the all-steel radial tire three-drum forming machine, there are two ways to load the tire bead. One of them is that the bead presetter is located on both sides of the carcass drum. Before the composite parts are bonded, the tire bead is manually placed on the bead presetter at both ends of the carcass drum. The carcass drum transfer ring takes the tire bead when taking the carcass drum and transfers it to the forming drum. Another way is that the tire bead presetter is located outside the carcass tube transfer ring, and the tire bead is manually placed on the external tire bead presetter, which automatically transfers the tire bead to the carcass tube transfer ring. The carcass tube transfer ring enters the carcass drum station before the cushion glue is attached, opens the flat width, and takes out the carcass tube after the cushion glue is attached. The carcass tube transfer ring also transfers the carcass tube and the tire bead to the forming drum.

[0004] For the above two methods, the first method can retain the middle ring of the carcass tube transfer ring, making the carcass tube transfer more reliable and widely used. However, since the manual operation takes about 7 seconds of cycle time, it does not meet the market technical requirements for higher and higher efficiency of tire forming machines and shorter and shorter single tire cycle time. The second method uses the spare time on the outside of the carcass tube transfer ring to put on the tire bead, which saves the cycle time and significantly improves the efficiency target; however, this tire bead transfer solution requires that the carcass tube transfer ring has no middle ring or only retains a lower magnet arc plate, which is easy to cause the carcass tube to have no magnet adsorption during the carcass tube transfer process, and it will also collapse due to gravity. Especially for large-sized tires or under conditions where the carcass tube transfer ring has a long waiting time carrying the carcass tube, it is easy to cause poor carcass tube transfer, poor tire dynamic balance data and other tire quality problems.

[0005] In the context of market demand for both efficiency and quality, it is urgent to design a presetter device that does not affect the configuration of the intermediate ring of the tire body tube transfer ring and can transfer the tire bead without taking up the beat time. Summary of the invention

[0006] The purpose of the present invention is to make up for the shortcomings of the prior art and provide a tire bead presetting device, which can place the bead during the operator's spare time without taking up the cycle time, and can retain the middle ring of the carcass tube transfer ring to ensure the quality of the tire.

[0007] In order to solve the above technical problems, the present invention adopts the following technical solutions:

[0008] A tire bead presetting device comprises a fixed frame body, a sliding plate, a movable arm, an expansion and contraction clamping mechanism and a driving mechanism which spans longitudinally above a bed; the sliding plate is slidably connected to a linear guide rail fixed to the fixed frame body; the movable arm is two and symmetrically arranged on both sides of the lower end of the sliding plate, and the preset distance between the two movable arms is greater than the thickness of the middle ring in the carcass tube transfer ring slidably mounted on the bed body, so as to avoid interference with the middle ring during the tire bead transfer process; the expansion and contraction clamping mechanism is two and is used to support the left tire bead and the right tire bead respectively, and the two The expansion and contraction clamping mechanisms are installed one by one on the outer sides of the two movable arms; the driving mechanism is fixed on the fixed frame, and is used to drive the sliding plate to move longitudinally along the linear guide rail on the fixed frame, so that the expansion and contraction clamping mechanism on the left side can be in a coaxial position with the left steel ring on the carcass tube transfer ring, or the expansion and contraction clamping mechanism on the right side can be in a coaxial position with the right preset ring slidably installed on the bed, so as to smoothly transfer the left tire bead to the left steel ring or smoothly transfer the right tire bead to the right preset ring.

[0009] Furthermore, the fixed frame includes two columns and a longitudinal beam; wherein, the longitudinal beam is horizontally installed between the upper ends of the two columns, the two ends of the longitudinal beam are respectively connected to the two columns through a frame precision adjustment mechanism, and the lower end of the longitudinal beam is symmetrically formed with two linear guide rails used in conjunction with the sliding plate.

[0010] Furthermore, each of the frame precision adjustment mechanisms respectively comprises a support plate, a locking bolt, a fixing plate and an adjusting bolt; wherein, the support plate is fixedly connected to the end of the longitudinal beam, and an oblong hole is opened on the side wall of the support plate, and the locking bolt passes through the oblong hole and is locked on the column to achieve the fixation of the longitudinal beam and the column; the fixing plate is fixedly connected to the side wall of the column, and the adjusting bolt is vertically threadedly connected to the fixing plate, and the upper end of the adjusting bolt is pressed against the lower end of the support plate; when the locking bolt is not locked, the position of the support plate can be adjusted by rotating the adjusting bolt, thereby achieving the parallelism adjustment of the linear guide on the longitudinal beam and the linear guide on the bed, and the locking bolt is used to lock it after the adjustment is completed.

[0011] Furthermore, the driving mechanism includes a motor and a transmission belt; wherein, the motor is fixed on the longitudinal beam, the transmission belt is longitudinally installed on the longitudinal beam through two pulleys, the upper end of the sliding plate is fixedly connected to the transmission belt, and the motor drives the transmission belt to rotate, thereby driving the sliding plate to move longitudinally along the linear guide rail on the longitudinal beam.

[0012] Furthermore, the sliding plate includes a first plate, a second plate and a sliding plate precision adjustment mechanism; wherein the first plate is stacked on the upper end of the second plate and the two are fixed by mounting bolts, a large circular hole is opened on the first plate, and the mounting bolt can be movably passed through the large circular hole and locked on the second plate to achieve the fixation of the first plate and the second plate; the upper end of the first plate is fixedly connected with a clamping block for connecting with the transmission belt and a sliding block for cooperating with the linear guide rail on the longitudinal beam; the lower end of the second plate is fixedly connected with two of the moving arms; the sliding plate The precision adjustment mechanism includes an inverted L-shaped plate and a top screw, the upper end of the L-shaped plate is fixedly connected to the first flat plate, and the top screw is threaded through the lower end of the L-shaped plate and pressed against the outer edge of the second flat plate; the sliding plate precision adjustment mechanism is multiple and distributed around the first flat plate and the second flat plate; when the mounting bolts are not locked, the positional relationship between the first flat plate and the second flat plate can be changed by adjusting the top screw, thereby adjusting the positional accuracy of the two movable arms to ensure the coaxiality of the two expansion and contraction clamping mechanisms with the carcass tube transfer ring and the right preset ring.

[0013] Furthermore, a guide rail clamp is fixedly connected to the first flat plate, and is used to clamp the linear guide rail on the longitudinal beam when the expansion and contraction clamping mechanism reaches the automatic winding station.

[0014] Furthermore, each of the expansion and contraction clamping mechanisms comprises a driving cylinder, a swing arm, a rotating shaft, a base plate, a rotating disk, a first connecting rod, a second connecting rod and a supporting roller; wherein the driving cylinder is connected to the moving arm through a cylinder mounting seat; the first end of the swing arm is hinged to the output end of the driving cylinder, and the second end is fixed to the rotating shaft; the rotating shaft is rotatably mounted on the lower end of the moving arm; the base plate is coaxially mounted on the rotating shaft and is fixed to the lower end of the moving arm; the rotating disk is coaxially fixed to the rotating shaft; the number of the first connecting rod and the second connecting rod is the same and both are at least Three, the two are used in a one-to-one correspondence and are evenly distributed around the rotating shaft; the first end of each of the first connecting rods is hinged to the turntable, and the second end is hinged to the middle part of a second connecting rod; the first end of each of the second connecting rods is hinged to the base plate, and the second end is respectively connected to one of the support rollers; the output end of the driving cylinder performs a telescopic action, driving the swing arm to drive the turntable to rotate with the rotating shaft, and then driving the first connecting rod to drive the second connecting rod to swing, so as to change the distance between the support roller and the rotating shaft, thereby realizing the expansion and contraction action of the expansion and contraction clamping mechanism.

[0015] Furthermore, each of the support rollers comprises a roller body, a magnet, an eccentric shaft, a locking nut, a bearing, a sleeve and a spring; wherein, a flange for limiting the tire bead is formed at the end of the roller body close to the second connecting rod; the magnets are multiple and circumferentially evenly embedded in the flange for adsorbing the tire bead; the eccentric shaft comprises a large diameter shaft and a small diameter shaft, the first end of the large diameter shaft is fixedly connected to a limiting cap, the second end is eccentrically connected to the first end of the small diameter shaft, an external thread is formed on the outer wall of the second end of the small diameter shaft and is used in conjunction with the locking nut, a mounting hole is opened on the second connecting rod, the small diameter shaft passes through the mounting hole and is locked by the second end of the large diameter shaft and the locking nut; the bearing is mounted between the roller body and the sleeve; the sleeve can be slidably mounted on the large diameter shaft; the spring is mounted on the large diameter shaft and is located between the sleeve and the end face of the second connecting rod for pushing the sleeve onto the limiting cap.

[0016] Furthermore, the locking nut is a locking nut with a non-metallic insert.

[0017] Furthermore, a specification adjustment mechanism is respectively provided between each of the cylinder mounting seats and the respective corresponding movable arms; each of the specification adjustment mechanisms comprises a bracket, a trapezoidal lead screw, a slider and a handwheel; wherein, the bracket is fixed on the movable arm, the trapezoidal lead screw is rotatably mounted vertically on the bracket, the slider is transmission-connected to the trapezoidal lead screw, and is slidingly connected to a linear guide rail fixed on the bracket, and is also fixedly connected to the cylinder mounting seat, the handwheel is fixedly connected to the end of the trapezoidal lead screw and is used to drive the trapezoidal lead screw to rotate; by rotating the handwheel, the slider can be driven to carry the cylinder mounting seat up and down along the linear guide rail on the bracket, thereby changing the initial position of the driving cylinder, so that the expansion and contraction diameter of the expansion and contraction clamping mechanism changes, so as to achieve the clamping of tire rims of different specifications and sizes.

[0018] Compared with the prior art, the beneficial effects of the present invention are as follows: the tire bead pre-setting device of the present invention can not only place the tire bead during the operator's free time, without occupying the cycle time, thus improving production efficiency, but also retain the intermediate ring of the carcass barrel transfer ring, thus ensuring the carcass barrel transfer accuracy and improving the equipment quality. The present invention is applicable to the all-steel load-bearing three-drum forming machine, and can meet the process requirements of tire bead placement and transmission. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to make the advantages of the present invention more easily understood, the present invention briefly described above will be described in more detail by referring to the specific embodiments shown in the accompanying drawings. It can be understood that these drawings only depict typical embodiments of the present invention and therefore should not be considered as limiting the scope of protection thereof, and the present invention is described and explained with additional characteristics and details through the accompanying drawings.

[0020] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention;

[0021] Figure 2 It is a structural schematic diagram of the frame precision adjustment mechanism in the present invention;

[0022] Figure 3 It is a schematic diagram of the cross-section structure of the sliding plate in the present invention;

[0023] Figure 4 A schematic diagram of the three-dimensional structure of the expansion and contraction clamping mechanism of the present invention at one angle;

[0024] Figure 5 It is a three-dimensional structural schematic diagram of another angle of the expansion and contraction clamping mechanism of the present invention;

[0025] Figure 6 It is a schematic diagram of the cross-section structure of the support roller in the present invention;

[0026] Figure 7 It is a schematic diagram of the structure of the present invention used in conjunction with a carcass tube transfer ring;

[0027] Figure 8 It is a schematic diagram of the structure of the present invention used in conjunction with the right preset ring.

[0028] Among them, 7-bed, 801-fixed frame, 8011-column, 8012-longitudinal beam, 802-sliding plate, 8021-first plate, 8022-second plate, 8023-sliding plate precision adjustment mechanism, 80231-L-shaped plate, 80232-top screw, 8024-mounting bolt, 8025-large round hole, 8026-clamping block, 8027-sliding block, 8028-guide rail clamp, 803-moving arm, 804-expansion and contraction clamping mechanism, 8041-driving cylinder, 8042-swing arm, 8043-rotating shaft, 8044-base, 8045-turntable, 8046-first connecting rod, 8047-second connecting rod, 8048-support roller, 80481-roller body, 80482- Magnet, 80483-eccentric shaft, 80484-locking nut, 80485-bearing, 80486-sleeve, 80487-spring, 80488-flanging, 8049-specification adjustment mechanism, 80491-bracket, 80492-trapezoidal screw, 80493-slider, 80494-handwheel, 805-driving mechanism, 8051-motor, 8052-transmission belt, 806-frame precision adjustment mechanism, 8061-support plate, 8062-locking bolt, 8063-fixing plate, 8064-adjusting bolt, 8065-oblong hole, 9-carcass tube transfer ring, 901-sidewall expansion ring, 902-left steel ring, 903-middle ring, 904-right steel ring, 10-right preset ring. DETAILED DESCRIPTION

[0029] In the following description, a large number of specific details are provided to provide a more thorough understanding of the present invention. However, it is obvious to those skilled in the art that the embodiments of the present invention can be implemented without one or more of these details. In other examples, in order to avoid confusion with the embodiments of the present invention, some technical features well known in the art are not described.

[0030] In order to fully understand the embodiments of the present invention, detailed structures will be presented in the following description. Obviously, the implementation of the embodiments of the present invention is not limited to the specific details familiar to those skilled in the art. The preferred embodiments of the present invention are described in detail below, but in addition to these detailed descriptions, the present invention may also have other embodiments.

[0031] In the description of the present invention, the terms "inside", "outside", "longitudinal", "lateral", "upper", "lower", "top", "bottom" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and do not require that the present invention must be constructed and operated in a specific orientation. Therefore, they should not be understood as limitations on the present invention.

[0032] The embodiments of the present invention are further described in detail below in conjunction with the accompanying drawings:

[0033] See also Figures 1 to 8 The embodiment of the present invention provides a tire bead presetting device, which mainly includes a fixed frame 801 spanning vertically above the bed 7, a sliding plate 802, a movable arm 803, an expansion and contraction clamping mechanism 804 and a driving mechanism 805. Among them, the sliding plate 802 is slidably connected to a linear guide rail fixed on the fixed frame 801; the movable arms 803 are two and symmetrically arranged on both sides of the lower end of the sliding plate 802, and the preset distance between the two movable arms 803 is greater than the thickness of the middle ring 903 in the carcass tube transfer ring 9 slidably installed on the bed 7. In particular, in the process of transferring the left tire bead, the two movable arms 803 need to move to a position coaxial with the carcass tube transfer ring 9, and at this time the middle ring 903 is just between the two movable arms 803, so the preset distance between the two movable arms 803 must ensure that there is enough space for the middle ring 903 to avoid interference between the two movable arms 803 and the middle ring 903 during the transfer of the left tire bead. There are two expansion and contraction clamping mechanisms 804, which are used to support the left tire bead and the right tire bead respectively. The two expansion and contraction clamping mechanisms 804 are installed on the outer sides of the two movable arms 803 in a one-to-one correspondence; the driving mechanism 805 is fixed on the fixed frame 801, and is used to drive the sliding plate 802 to move longitudinally along the linear guide rail on the fixed frame 801, so that the expansion and contraction clamping mechanism 804 on the left side can be in a coaxial position with the left steel ring 902 on the tire body tube transfer ring 9, or the expansion and contraction clamping mechanism 804 on the right side can be in a coaxial position with the right pre-set ring 10 slidably installed on the bed 7, so as to smoothly transfer the left tire bead to the left steel ring 902 or smoothly transfer the right tire bead to the right pre-set ring 10.

[0034] As a further solution of the present invention: Figure 1 As shown, the fixed frame 801 includes two columns 8011 and a longitudinal beam 8012. The longitudinal beam 8012 is horizontally installed between the tops of the two columns 8011. The two ends of the longitudinal beam 8012 are respectively connected to the two columns 8011 through a frame body precision adjustment mechanism 806. The lower end of the longitudinal beam 8012 is symmetrically formed with two linear guide rails used in conjunction with the sliding plate 802. The two frame body precision adjustment mechanisms 806 have the same structure and are symmetrically arranged. Now, taking one frame body precision adjustment mechanism 806 as an example, its structure is described in detail. Figure 2As shown, the frame precision adjustment mechanism 806 includes a support plate 8061, two locking bolts 8062, a fixing plate 8063 and an adjusting bolt 8064; wherein the support plate 8061 is fixedly connected to the end of the longitudinal beam 8012, and two oblong holes 8065 are formed on the side wall of the support plate 8061, and each locking bolt 8062 passes through a corresponding oblong hole 8065 and is locked on the column 8011 to achieve the fixation of the longitudinal beam 8012 and the column 8011, and the fixing plate 8063 and the column 8011 are fixedly connected. The side wall is fixed, and the adjusting bolt 8064 is vertically threadedly connected to the fixing plate 8063. The upper end of the adjusting bolt 8064 is pressed against the lower end of the supporting plate 8061. When the two locking bolts 8062 are not locked, the position of the supporting plate 8061 can be adjusted by rotating the adjusting bolt 8064, thereby adjusting the parallelism between the linear guide rail on the longitudinal beam 8012 and the linear guide rail on the bed 7. After the adjustment is completed, the longitudinal beam 8012 and the column 8011 are locked by the two locking bolts 8062. In addition, the exterior of the fixing frame 801 is covered with an appearance cover assembly to optimize the appearance of the equipment and prevent the solenoid valve and electrical components from being exposed, so that the equipment meets functionality while taking into account appearance.

[0035] As a further solution of the present invention: Figure 1 As shown, the driving mechanism 805 includes a motor 8051 and a transmission belt 8052. The motor 8051 is fixed on the longitudinal beam 8012. The transmission belt 8052 is longitudinally installed on the longitudinal beam 8012 through two pulleys. The upper end of the sliding plate 802 is fixed to the transmission belt 8052 through a clamping block 8026. The motor 8051 drives the transmission belt 8052 to rotate, thereby driving the sliding plate 802 to move longitudinally along the linear guide rail on the longitudinal beam 8012.

[0036] As a further solution of the present invention: Figure 1 and Figure 3 As shown, the sliding plate 802 includes a first plate 8021, a second plate 8022 and a sliding plate precision adjustment mechanism 8023. The first plate 8021 is stacked on the upper end of the second plate 8022 and the two are fixed by mounting bolts 8024. A large circular hole 8025 is opened on the first plate 8021. The diameter of the large circular hole 8025 is larger than the diameter of the screw rod of the mounting bolt 8024 and smaller than the diameter of the nut of the mounting bolt 8024. The mounting bolt 8024 can be movably passed through the large circular hole 8025 and locked on the second plate 8022 to achieve the fixation of the first plate 8021 and the second plate 8022; the upper end of the first plate 8021 is fixedly connected with a clamping block 8026 for connecting with the transmission belt 8052 and a sliding block 8027 for cooperating with the linear guide rail on the longitudinal beam 8012; the lower end of the second plate 8022 is symmetrically fixedly connected with two moving arms 803.

[0037] Furthermore, if Figure 3 As shown, the sliding plate precision adjustment mechanism 8023 includes an inverted L-shaped plate 80231 and a top screw 80232. The upper end of the L-shaped plate 80231 is fixed to the outer edge of the first flat plate 8021 by bolts, and the top screw 80232 is threadedly connected to the lower end of the L-shaped plate 80231, and the end of the top screw 80232 is pressed against the outer edge of the second flat plate 8022. The sliding plate precision adjustment mechanism 8023 is multiple and distributed around the first flat plate 8021 and the second flat plate 8022. Specifically, two sliding plates can be respectively provided at the two side edges in the longitudinal direction. The plate precision adjustment mechanism 8023 can be provided with a sliding plate precision adjustment mechanism 8023 on each of the two side edges in the transverse direction; when the mounting bolts 8024 are not locked, the positional relationship between the first plate 8021 and the second plate 8022 can be changed by adjusting the top screws 80232 in cooperation with each other, that is, the positional relationship between the second plate 8022 and the first plate 8021 can be adjusted, and then the positional precision of the two moving arms 803 can be adjusted to ensure the coaxiality of the two expansion and contraction clamping mechanisms 804 and the carcass tube transfer ring 9 and the right preset ring 10. In addition, the second plate 8022 can be divided into two parts, which are separately connected to the first plate 8021 and are also each connected to a moving arm 803, and each part can be adjusted by a plurality of sliding plate precision adjustment mechanisms 8023 to achieve the separate adjustment of the two moving arms 803, and the coaxiality between the two moving arms 803 can be adjusted.

[0038] As a further solution of the present invention: Figure 1 and Figure 3 As shown, a guide rail clamp 8028 is also fixedly connected to the first flat plate 8021. The guide rail clamp 8028 is used in conjunction with the linear guide rail on the longitudinal beam 8012 to clamp the linear guide rail on the longitudinal beam 8012 when the expansion and contraction clamping mechanism 804 reaches the automatic coiling station to prevent the position of the sliding plate 802 from changing. A limit switch is installed on the longitudinal beam 8012. The limit switch is used in conjunction with the sliding plate 802. When the sliding plate 802 moves into position, the limit switch sends a signal to the control device of the system, and then the control device of the system controls the guide rail clamp 8028 to move and clamp the linear guide rail on the longitudinal beam 8012.

[0039] As a further solution of the present invention: Figure 1 , Figure 4 and Figure 5As shown, the two expansion and contraction clamping mechanisms 804 have the same structure and are symmetrically arranged. Taking one expansion and contraction clamping mechanism 804 as an example, its structure is described in detail. The expansion and contraction clamping mechanism 804 includes a driving cylinder 8041, a swing arm 8042, a rotating shaft 8043, a base plate 8044, a rotating plate 8045, a first connecting rod 8046, a second connecting rod 8047 and a supporting roller 8048. The cylinder body of the driving cylinder 8041 is fixed on the cylinder mounting seat, and the cylinder mounting seat is connected to the moving arm 803; the first end of the swing arm 8042 is hinged to the output end of the driving cylinder 8041, and the second end is fixed to the rotating shaft 8043; the rotating shaft 8043 is rotatably mounted on the lower end of the moving arm 803; the base plate 8044 is coaxially sleeved on the rotating shaft 8043 and fixed to the lower end of the moving arm 803. Preferably, six connecting ends are evenly distributed circumferentially on the base plate 8044 for use with the second connecting rod 8047; the rotating disk 8045 is coaxially fixed with the rotating shaft 8043; the number of the first connecting rod 8046 and the second connecting rod 8047 is the same, preferably, both are six, the first connecting rod 8046 and the second connecting rod 8047 are used in a one-to-one correspondence and are evenly distributed around the rotating shaft 8043; the first end of each first connecting rod 8046 is hinged to the turntable 8045, and the second end is hinged to the middle part of a second connecting rod 8047; the first end of each second connecting rod 8047 is hinged to a connecting end of the base plate 8044, and the second end is respectively connected to a supporting roller 8048. The output end of the driving cylinder 8041 performs a telescopic action, driving the swing arm 8042 to drive the rotating shaft 8043 to rotate, and the turntable 8045 rotates along with the rotating shaft 8043, thereby driving the first connecting rod 8046 to drive the second connecting rod 8047 to swing around the hinge point between the connecting end and the base plate 8044, so as to change the distance between the supporting roller 8048 and the rotating shaft 8043, thereby realizing the expansion and contraction action of the expansion and contraction clamping mechanism 804.

[0040] As a further solution of the present invention: Figure 4 and Figure 5As shown, a specification adjustment mechanism 8049 is also provided between each cylinder mounting seat and the corresponding moving arm 803. The two specification adjustment mechanisms 8049 in the two expansion and contraction clamping mechanisms 804 are of the same structure and symmetrically arranged. Now, taking one specification adjustment mechanism 8049 as an example, its structure is described in detail. The specification adjustment mechanism 8049 includes a bracket 80491, a trapezoidal lead screw 80492, a slider 80493 and a hand wheel 80494. Among them, the bracket 80491 is fixed on the movable arm 803, the trapezoidal screw 80492 is rotatably installed vertically on the bracket 80491, the slider 80493 is transmission-connected to the trapezoidal screw 80492, the slider 80493 is vertically slidingly connected to the linear guide fixed on the bracket 80491, and the slider 80493 is also fixedly connected to the cylinder mounting seat, and the handwheel 80494 is fixedly connected to the end of the trapezoidal screw 80492 and is used to drive the trapezoidal screw 80492 to rotate; by rotating the handwheel 80494, the slider 80493 can be driven to carry the cylinder mounting seat together along the linear guide on the bracket 80491 to move up and down, thereby changing the initial position of the driving cylinder 8041, so that the expansion and contraction diameter of the expansion and contraction clamping mechanism 804 changes, so as to realize the clamping of tire rims of different specifications and grades, and full stroke coverage can be achieved without changing the tooling. In addition, the trapezoidal lead screw 80492 has a self-locking function, and the position is self-locking after the inch adjustment is completed.

[0041] As a further solution of the present invention: Figure 6As shown, the support roller 8048 includes a roller body 80481, a magnet 80482, an eccentric shaft 80483, a locking nut 80484, a bearing 80485, a sleeve 80486 and a spring 80487. Among them, a flange 80488 is formed at the end of the roller body 80481 close to the second connecting rod 8047, and the flange 80488 is used to limit the tire bead. The flange 80488 does not need to be designed and installed on all roller bodies 80481, and can be set on several roller bodies 80481 in an interval manner; there are multiple magnets 80482 and they are evenly distributed circumferentially and embedded in the flange 80488, and the magnets 80482 are used to adsorb the tire bead; the eccentric shaft 80483 includes a large diameter shaft and a small diameter shaft, the first end of the large diameter shaft is fixedly connected to the limiting cap, and the second end is eccentrically connected to the first end of the small diameter shaft, and the outer wall of the second end of the small diameter shaft is formed with an external thread and is used in conjunction with a locking nut 80484, and the second connecting rod 8047 is provided with a mounting hole, and the small diameter shaft passes through the mounting hole and uses the second end of the large diameter shaft and the locking nut Nut 80484 is used for locking; bearing 80485 is installed between roller body 80481 and sleeve 80486. Specifically, a stepped hole is formed inside roller body 80481, and the outer ring of bearing 80485 is inserted into the stepped hole and locked by a large retaining ring. A step is formed on the outer wall of sleeve 80486, and the inner ring of bearing 80485 is sleeved on the outer wall of sleeve 80486 and pressed against the step, and then locked by a small retaining ring; sleeve 80486 is slidably matched and sleeved on the large diameter shaft; spring 80487 is sleeved on the large diameter shaft and is located between the end faces of sleeve 80486 and the second connecting rod 8047, so as to press sleeve 80486 against the limiting cap. Spring 80487 is designed to allow roller body 80481 to have a certain amount of axial movement during automatic winding to ensure winding accuracy. Figure 4 and Figure 5 As shown, each expansion and contraction clamping mechanism 804 is provided with six support rollers 8048, which are evenly arranged around the rotating shaft 8043 in the circumferential direction, and are used to support the tire bead. Moreover, the position of the support roller 8048 can be slightly adjusted by adjusting the eccentric shaft 80483. Specifically, the position of the large diameter shaft is changed by rotating the small diameter shaft, thereby achieving fine adjustment of the position of the support roller 8048, ensuring that each support roller 8048 can contact the tire bead and ensure the same roundness of each support roller 8048. After the adjustment is completed, the small diameter shaft is locked with a locking nut 80484 with a non-metallic insert to prevent the position of the support roller 8048 from changing.

[0042] Combination Figure 7 and Figure 8, the working principle of the tire bead presetting device of the present invention is explained: the operation steps of the carcass drum station mainly include: composite parts bonding, composite parts sewing, sub-mouth bonding, cord bonding, cord manual sewing, cord rolling, cushion glue bonding, and carcass tube unloading, wherein during the cord rolling process, the operator has a certain amount of idle time, at which time the operator can install the left tire bead and the second right tire bead on the left and right expansion and contraction clamping mechanisms 804; then, the two expansion and contraction clamping mechanisms 804 move along the linear guide rail on the longitudinal beam 8012 to a position coaxial with the carcass tube transfer ring 9 and automatically transfer the left tire bead to the left steel ring 902, and then the two expansion and contraction clamping mechanisms 804 are reset; then, after the cushion glue bonding is completed on the carcass drum, the carcass tube transfer ring 9 carries the left tire bead and moves along the linear guide rail on the bed 7 to the carcass drum tube taking station (i.e., the position when the intermediate ring 903 is in the middle of the carcass drum), and reaches the tube taking station. , the right pre-set ring 10 automatically transfers the first right tire bead it carries to the right steel ring 904 of the carcass tube transfer ring 9, and then the right pre-set ring 10 returns to the waiting position, and then the left steel ring 902 and the right steel ring 904 of the carcass tube transfer ring 9 shrink to the flat width position, the magnet arc plate of the middle ring 903 shrinks to take the carcass tube, the carcass drum shrinks and rotates, and the carcass tube transfer ring 9 completes taking the carcass tube; then, wait for the carcass tube transfer ring 9 to move with the carcass tube, the left tire bead and the first right tire bead When the molding drum station is reached and the molding process is performed, the right pre-set ring 10 moves along the linear guide rail on the bed 7 to the bead-up station (i.e., the position where the right pre-set ring 10 is used to receive the second right tire bead), and the two expansion and contraction clamping mechanisms 804 move along the linear guide rail on the longitudinal beam 8012 to a position coaxial with the right pre-set ring 10 and automatically transfer the right tire bead to the right pre-set ring 10, after which the carcass tube transfer ring 9 and the right pre-set ring 10 both return to their initial positions and perform a cyclic operation. In the above-mentioned bead-up process, during the first operation, the first right tire bead can be manually installed on the right pre-set ring 10, and in the subsequent cyclic operation, the first right tire bead carried on the right pre-set ring 10 is the second right tire bead received in the previous operation.

[0043] The tire bead presetting device provided by the present invention solves the long-standing problem in the industry that the bead transfer cannot take into account both production efficiency and tire product quality. The beat sequence of transferring the left and right bead is scientifically and rationally coordinated, shortening the cycle time of a single tire. The precision adjustment structure ensures the transfer accuracy of the bead, and the full-stroke expansion and contraction clamping mechanism saves the operator time to change tooling. The present invention lays a foundation for the high efficiency, intelligence, lightweight and low cost of tire building machines.

[0044] In summary, the content of the present invention is not limited to the above-mentioned embodiments, and those skilled in the art can propose other embodiments within the technical guiding idea of ​​the present invention, but these embodiments are all included in the scope of the present invention.

Claims

1. A tire bead presetting device, characterized in that: It includes a fixed frame body that spans vertically above the bed, a sliding plate, a moving arm, an expansion and contraction clamping mechanism and a driving mechanism; The sliding plate is slidably connected to a linear guide rail fixed on the fixed frame; There are two movable arms symmetrically arranged on both sides of the lower end of the sliding plate, and the preset distance between the two movable arms is greater than the thickness of the middle ring in the tire tube transfer ring slidably mounted on the bed, so as to avoid interference with the middle ring during tire bead transfer; There are two expansion and contraction clamping mechanisms, which are used to support the left tire bead and the right tire bead respectively, and the two expansion and contraction clamping mechanisms are installed on the outside of the two movable arms in a one-to-one correspondence; The driving mechanism is fixed on the fixed frame and is used to drive the sliding plate to move longitudinally along the linear guide rail on the fixed frame, so that the expansion and contraction clamping mechanism on the left side can be in a coaxial position with the left steel ring on the carcass tube transfer ring or the expansion and contraction clamping mechanism on the right side can be in a coaxial position with the right pre-set ring slidably mounted on the bed, so as to smoothly transfer the left tire bead to the left steel ring or smoothly transfer the right tire bead to the right pre-set ring; The fixed frame includes two columns and a longitudinal beam; wherein, The longitudinal beam is horizontally installed between the upper ends of the two columns, and the two ends of the longitudinal beam are respectively connected to the two columns through a frame precision adjustment mechanism, and the lower end of the longitudinal beam is symmetrically formed with two linear guide rails used in conjunction with the sliding plate; The driving mechanism includes a motor and a transmission belt; wherein, The motor is fixed on the longitudinal beam, the transmission belt is longitudinally installed on the longitudinal beam through two pulleys, the upper end of the sliding plate is fixedly connected to the transmission belt, and the motor drives the transmission belt to rotate, thereby driving the sliding plate to move longitudinally along the linear guide rail on the longitudinal beam; The sliding plate includes a first plate, a second plate and a sliding plate precision adjustment mechanism; wherein, The first plate is stacked on the upper end of the second plate and the two are fixed by mounting bolts. A large circular hole is opened on the first plate, and the mounting bolt can movably pass through the large circular hole and be locked on the second plate to achieve the fixation of the first plate and the second plate; The upper end of the first flat plate is fixedly connected with a clamping block for connecting with the transmission belt and a sliding block for cooperating with the linear guide rail on the longitudinal beam; The lower end of the second flat plate is fixedly connected to the two movable arms; The sliding plate precision adjustment mechanism comprises an inverted L-shaped plate and a top screw, wherein the upper end of the L-shaped plate is fixedly connected to the first flat plate, and the top screw is threadedly connected to the lower end of the L-shaped plate and is pressed against the outer edge of the second flat plate; The sliding plate precision adjustment mechanisms are multiple and distributed around the first flat plate and the second flat plate; When the mounting bolts are not locked, the positional relationship between the first plate and the second plate can be changed by adjusting the top screw, thereby adjusting the position accuracy of the two movable arms to ensure the coaxiality of the two expansion and contraction clamping mechanisms with the carcass tube transfer ring and the right preset ring.

2. The tire bead presetting device according to claim 1, characterized in that: Each of the frame precision adjustment mechanisms comprises a support plate, a locking bolt, a fixing plate and an adjustment bolt; wherein, The support plate is fixedly connected to the end of the longitudinal beam, and a long circular hole is opened on the side wall of the support plate. The locking bolt passes through the long circular hole and is locked on the column to achieve the fixation of the longitudinal beam and the column; The fixing plate is fixedly connected to the side wall of the column, the adjusting bolt is vertically threadedly connected to the fixing plate, and the upper end of the adjusting bolt is pressed against the lower end of the supporting plate; When the locking bolt is not locked, the position of the support plate can be adjusted by rotating the adjusting bolt, thereby adjusting the parallelism between the linear guide rail on the longitudinal beam and the linear guide rail on the bed, and then locked by the locking bolt after the adjustment.

3. The tire bead presetting device according to claim 1, characterized in that: A guide rail clamp is fixedly connected to the first flat plate and is used for clamping the linear guide rail on the longitudinal beam when the expansion and contraction clamping mechanism reaches the automatic coiling station.

4. The tire bead presetting device according to claim 1, characterized in that: Each of the expansion and contraction clamping mechanisms comprises a driving cylinder, a swing arm, a rotating shaft, a base plate, a rotating plate, a first connecting rod, a second connecting rod and a supporting roller; wherein, The driving cylinder is connected to the moving arm via a cylinder mounting seat; The first end of the swing arm is hinged to the output end of the driving cylinder, and the second end is fixed to the rotating shaft; The rotating shaft is rotatably mounted on the lower end of the movable arm; The base plate is coaxially mounted on the rotating shaft and is fixedly connected to the lower end of the moving arm; The rotating disk is coaxially fixed to the rotating shaft; The number of the first connecting rods and the second connecting rods is the same and at least three, and the two are used in a one-to-one correspondence and are evenly distributed around the rotating shaft; The first end of each of the first connecting rods is hinged to the rotating disk, and the second end is hinged to the middle part of a second connecting rod; The first end of each of the second connecting rods is hinged to the base plate, and the second end is respectively connected to one of the supporting rollers; The output end of the driving cylinder performs a telescopic action, driving the swing arm to drive the turntable to rotate along with the rotating shaft, and then driving the first connecting rod to drive the second connecting rod to swing, so as to change the distance between the supporting roller and the rotating shaft, thereby realizing the expansion and contraction action of the expansion and contraction clamping mechanism.

5. The tire bead presetting device according to claim 4, characterized in that: Each of the supporting rollers comprises a roller body, a magnet, an eccentric shaft, a locking nut, a bearing, a sleeve and a spring; wherein, The end of the roller body close to the second connecting rod is formed with a flange for limiting the tire bead position; The magnets are multiple and evenly distributed circumferentially and embedded on the flange to adsorb the tire bead; The eccentric shaft comprises a large diameter shaft and a small diameter shaft, the first end of the large diameter shaft is fixedly connected to a limiting cap, and the second end is eccentrically connected to the first end of the small diameter shaft, an external thread is formed on the outer wall of the second end of the small diameter shaft and is used in conjunction with the locking nut, a mounting hole is formed on the second connecting rod, the small diameter shaft passes through the mounting hole and is locked by using the second end of the large diameter shaft and the locking nut; The bearing is installed between the roller body and the sleeve; The shaft sleeve is slidably mounted on the large diameter shaft; The spring is sleeved on the large diameter shaft and is located between the shaft sleeve and the end surface of the second connecting rod, so as to push the shaft sleeve onto the limiting cap.

6. The tire bead presetting device according to claim 5, characterized in that: The locking nut is a locking nut with a non-metallic insert.

7. The tire bead presetting device according to any one of claims 4 to 6, characterized in that: A specification adjustment mechanism is also provided between each of the cylinder mounting seats and the corresponding movable arm; Each of the specification adjustment mechanisms comprises a bracket, a trapezoidal lead screw, a slider and a hand wheel; wherein the bracket is fixed on the movable arm, the trapezoidal lead screw is rotatably mounted vertically on the bracket, the slider is drivingly connected to the trapezoidal lead screw, and is slidably connected to a linear guide rail fixed on the bracket, and is also fixed to the cylinder mounting seat, and the hand wheel is fixed to the end of the trapezoidal lead screw and is used to drive the trapezoidal lead screw to rotate; By rotating the hand wheel, the slider can be driven to move up and down along the linear guide rail on the bracket together with the cylinder mounting seat, thereby changing the initial position of the driving cylinder, so that the expansion and contraction diameter of the expansion and contraction clamping mechanism changes, so as to achieve the clamping of tire rims of different specifications and sizes.

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