Auxiliary device for attaching tire shoulder pad rubber to capsule forming drum

Abstract

The invention discloses a capsule forming drum tire shoulder pad rubber attaching auxiliary device which comprises a middle base assembly, a plurality of piston cavities internally provided with piston mechanisms are circumferentially formed in a main frame body of the middle base assembly in the radial direction of a main shaft, and the pneumatic driving structure is used for driving the piston mechanisms. The plurality of supporting turning plate assemblies are respectively arranged at the piston mechanisms; the supporting turning plate assembly comprises a base fixed to the piston rod end, two supporting plates are arranged in the axial direction of the main shaft, two connecting bases hinged to the two sides of the base through optical shafts are arranged on one sides of the two supporting plates, and the supporting turning plate assembly is arranged in a V-shaped turning state through torsional springs on the optical shafts. The end sides of the two connecting bases located at the opposite angles are arc-shaped ends capable of being in rolling friction fit with reset bearings on the main frame body so as to drive the supporting plates to be overturned to be in a plane unfolding state. The device is driven without pipes, the supporting plate of the device automatically ascends and descends along with the action of the piston rod, the extending distance and the overturning state of the supporting plate are accurately positioned through a mechanical hard limiting structure, stability is good, efficiency is high, and labor intensity is low.

Description

Technical Field

[0001] The invention relates to the technical field of capsule forming drums, in particular to a capsule forming drum tire shoulder pad glue laminating auxiliary device. Background Art

[0002] In the existing four-drum forming machines for all-steel radial tires, there are generally two types of forming drums: mechanical drums and capsule drums. What is the same is that both types of forming drums must have an auxiliary device installed in the middle of the single drums on both sides during the shoulder pad glue bonding process. The function of the auxiliary device is to support the tire body tube 4 during the shoulder pad glue bonding process to ensure the bonding accuracy of the shoulder pad glue, and at the same time, the bonding length of the shoulder pad glue can be accurately controlled. However, due to the limited space between the single drums on both sides, during the tire embryo shaping process, the auxiliary device needs to be turned up to leave enough space for the single drums on both sides. On the mechanical drum, the auxiliary device can be linked with the single drums on both sides through a mechanical structure, and can stably realize the turning up and down movements; but on the capsule drum, due to the limitations of the single drum structure on both sides, it cannot be linked through a mechanical structure; therefore, an auxiliary device with a relatively independent structure that can stably realize the turning up and down movements is particularly important.

[0003] The published patent CN113650333A provides a capsule forming drum tire shoulder pad glue fitting auxiliary device, which is installed on the main shaft of the forming drum through an intermediate frame. The intermediate frame is provided with eight groups of piston rods evenly distributed in the circumferential direction. The eight groups of support plates are respectively connected to the piston rods to realize the lifting and lowering movement of the support plates. At the same time, each group of support plates is connected to two groups of standard cylinders to realize the flipping and falling of the support plates. There are air holes on the main shaft, and compressed air is provided to the piston rods and cylinders through air pipes. However, the device has the following problems during assembly and use: 1) Since the air source supply of the eight groups of piston rods and sixteen groups of standard cylinders is realized by arranging air pipes, the overall pipe layout of the device is large, the workload during installation is large, and the air pipe lacks effective fixation, and there is a risk of scratches during operation; 2) The capsule drum of the forming machine needs to be replaced and maintained regularly. During the replacement of the drum, the device needs to be disassembled together. During disassembly, the air supply air pipe needs to be removed from the main shaft air hole first, and then the device is disassembled as a whole. Since the overall structure of the device is compact and the operating space is small, Therefore, the disassembly process is difficult and time-consuming; 3) During the shoulder pad glue bonding process, the support plate needs to be in a horizontal falling state. Since the support plate is supported by a cylinder, there is an unstable support, which will affect the bonding effect. When the bonding effect is not ideal, manual trimming is required, which will affect the production efficiency of the equipment and increase the labor intensity; 4) The installation method of the device and the main shaft has the risk of loosening. Under the action of long-term large centrifugal force, the connector itself has the risk of deformation, and the installation margin of the connector's own installation hole is also one of the hidden dangers of loosening. After the device is loose, it will have a great impact on the bonding accuracy, the life of the device itself, and the life of the main shaft.

[0004] Based on this, this design mainly takes the existing technology as the background, solves and optimizes the problems existing in the existing technology, streamlines the structure of the device, makes it easier to operate and maintain, improves the stability of the device operation, and assists the stable operation of the device, which can greatly reduce the number of manual interventions, improve the production efficiency of the equipment, and reduce the intensity of manual labor. It is also an indispensable factor in realizing unmanned bonding of pad glue. Summary of the invention

[0005] The purpose of the present invention is to provide a capsule forming drum tire shoulder pad glue fitting auxiliary device which solves the above technical problems.

[0006] To this end, the technical solution of the present invention is as follows: A capsule forming drum tire shoulder pad glue bonding auxiliary device comprises an intermediate base assembly, which comprises a main frame body sleeved on the main shaft of the forming drum, a plurality of piston cavities are circumferentially opened on the main frame body along the radial direction of the main shaft, a piston mechanism is arranged in the piston cavity, and the piston mechanism comprises a piston rod that performs telescopic movement in the piston cavity along the radial direction of the main shaft; a pneumatic drive structure is also arranged on the main frame body, which comprises an extension drive air circuit for driving all piston rods to extend outward synchronously and a retraction drive air circuit for driving all piston rods to retract inward synchronously; a plurality of support flap assemblies are evenly arranged on each piston along the circumferential direction of the intermediate base assembly Mechanism; the support flap assembly includes a base vertically fixed on the end of the piston rod, and two support plates are symmetrically arranged on both sides of the base along the main axis; two connecting seats are provided on one side of the support plate, and the two are hingedly connected to the base through an optical axis, and the two support plates are arranged in a V-shaped flip state through a torsion spring arranged on the optical axis; the end sides of the two connecting seats located in the diagonal direction are processed into arc ends, and the two and the reset bearings rotatably arranged on both sides of the piston mechanism on the main frame can form a rolling friction fit when they abut against each other, so as to drive the two connecting seats to rotate in the opposite direction, so that the two support plates are flipped to a planar unfolded state.

[0007] Furthermore, the piston mechanism also includes a fixed sleeve and an end cover; an annular boss is provided at one end of the piston rod and is embedded in the piston cavity to separate the extension cavity and the retraction cavity; the fixed sleeve is arranged on the outside of the piston rod and fixed on the inner wall of the piston cavity; the end cover is arranged on the outside of the piston rod end and closes the piston cavity opening.

[0008] Furthermore, sealing rings are provided between the outer wall of the annular boss of the piston rod and the wall of the radial mounting hole, and between the wall of the through hole of the end cover and the rod wall of the piston rod.

[0009] Furthermore, the main frame body is split into two semi-annular bodies, and the end faces of the two bodies are connected by a locking block and are tightly clamped to the outside of the main shaft.

[0010] Furthermore, a plurality of positioning pins are arranged at intervals on the inner annular surface of the main frame, and a plurality of matching positioning grooves are correspondingly opened on the circumferential outer wall of the main shaft, so that the main frame is sleeved on the outside of the main shaft in a manner that the plurality of positioning pins on it are respectively inserted into the positioning grooves on the main shaft.

[0011] Furthermore, in the pneumatic drive structure, one end of the extending drive air circuit is respectively connected to the bottom of each piston cavity, and the other end is located on the inner annular surface of the main frame and is connected to the first air circuit opened on the side wall of the main shaft; one end of the retracting drive air circuit is respectively connected to the opening side of each piston cavity, and the other end is located on the inner annular surface of the main frame and is connected to the second air circuit opened on the side wall of the main shaft.

[0012] Furthermore, guide holes are opened on both sides of each piston mechanism on the main frame, and a guide column is provided at the bottom of the base. The guide column is slidably inserted in the guide hole to radially guide the support flap assembly.

[0013] Furthermore, limiting blocks are arranged on both sides of each piston mechanism on the main frame, and a limiting claw is arranged at the bottom of the base. The bottom claw of the limiting claw can abut against the limiting block as the piston rod extends outward to limit the maximum extension length of the piston rod.

[0014] Furthermore, an adjusting bolt is radially penetrated and fixed on the claw portion of the limiting claw along the main frame, and the adjusting bolt can abut against the limiting block as the piston rod extends outward.

[0015] Furthermore, wedge-shaped pads are provided on adjacent side end walls of the two support plates, and the two support plates are arranged with inclined surfaces facing each other, so that the two support plates abut against the top of the base through the wedge-shaped pads and are arranged in a V-shaped flip state.

[0016] Compared with the prior art, the capsule forming drum tire shoulder pad glue fitting auxiliary device has the following beneficial effects: (1) The device provides air supply to the piston mechanism by providing a pneumatic drive structure on the main frame, thereby realizing tubeless driving of multiple groups of piston mechanisms. At the same time, by providing a flip torsion spring at the hinge of the support plate, and by structural coordination between the connecting seat of the support flap assembly and the reset bearing of the intermediate base assembly, the flipping and unfolding of the support plate is realized by using the lever principle, thereby completely replacing the lifting and lowering action of the original cylinder-driven support plate. The above structural design not only greatly simplifies the structure and reduces the workload during the assembly process, but also can realize rapid disassembly and assembly on the main shaft, facilitating subsequent maintenance work. (2) The device is designed with limit claws, adjustment bolts, hard limit blocks and wedge-shaped pads, that is, the mechanical hard limit is used to position the support plate's extension distance and different flipping states. This not only overcomes the problem of the support plate's position accuracy caused by cylinder control, but also can adapt to different specifications of forming drums; thereby effectively improving the stability of the shoulder pad glue bonding effect, greatly reducing the number of manual interventions, improving the equipment's production efficiency, and reducing manual labor intensity. It is also an indispensable factor in realizing unmanned pad glue bonding; (3) The intermediate base assembly of the device adopts a split structure, and is securely installed on the main shaft through the cooperation between the locking block and the groove, and between the positioning pin and the positioning groove, thereby eliminating the risk of the device loosening during the rotation of the main shaft. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the assembly structure of the intermediate base assembly and the single supporting flap assembly of the capsule forming drum tire shoulder pad glue bonding auxiliary device in an embodiment of the present invention relative to the main shaft of the forming drum; Figure 2 It is a schematic diagram of the structure of one side of the capsule forming drum tire shoulder pad glue fitting auxiliary device in an embodiment of the present invention; Figure 3 It is a schematic diagram of the structure of the other side of the capsule forming drum tire shoulder pad glue fitting auxiliary device in an embodiment of the present invention; Figure 4 It is a partial cross-sectional view of the intermediate base assembly of the capsule forming drum tire shoulder pad glue bonding auxiliary device in an embodiment of the present invention; Figure 5 It is a structural schematic diagram of a support flap assembly of a capsule forming drum tire shoulder pad glue bonding auxiliary device in an embodiment of the present invention; Figure 6 It is a front view structural schematic diagram of the capsule forming drum tire shoulder pad glue fitting auxiliary device at the initial loading position in an embodiment of the present invention; Figure 7 It is a side structural schematic diagram of the capsule forming drum tire shoulder pad glue fitting auxiliary device in the embodiment of the present invention in the fitting position; Figure 8 It is a side structural schematic diagram of the capsule forming drum tire shoulder pad glue fitting auxiliary device in the embodiment of the present invention in the forming position; Fig. 9 It is a front view structural schematic diagram of the support flap assembly during the change process from the bonding position to the shaping position of the bladder forming drum tire shoulder pad glue bonding auxiliary device in the embodiment of the present invention; Fig.10 It is a front view structural schematic diagram of the support flap assembly of the bladder forming drum tire shoulder pad glue bonding auxiliary device in an embodiment of the present invention at the tire unloading position (i.e., the initial loading position). DETAILED DESCRIPTION

[0018] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments, but the following embodiments are by no means intended to limit the present invention in any way.

[0019] See also Figure 1 The capsule forming drum tire shoulder pad glue bonding auxiliary device includes an intermediate base assembly 1 and eight supporting flap assemblies 2 evenly distributed along the circumferential direction of the intermediate base assembly 1; the intermediate base assembly 1 is an annular structure, which is sleeved and fixed on the outside of the center position of the main shaft 3 of the forming drum to rotate synchronously with the main shaft 3.

[0020] See also Figure 1 and Figure 4 The intermediate base assembly 1 includes a main frame body 101 with an annular structure, the size of the center hole of which matches the size of the main shaft 3 so that it can just embrace the outside of the main shaft 3.

[0021] The main frame 101 is provided with eight piston cavities evenly distributed in a circumferential shape along the radial direction of the main shaft 3 , and piston mechanisms are arranged in the piston cavities. The piston rods 106 of the eight piston mechanisms are radially slidably arranged in the eight piston cavities to synchronously perform telescopic motion along the radial direction of the main shaft 3 .

[0022] In this embodiment, eight piston chambers are radially opened from the outer annular surface of the main frame 101, and the piston mechanism includes a piston rod 106, a fixing sleeve 112 and an end cover 109; the piston rod 106 is a cylindrical rod body with an annular boss at one end, and the size of the annular boss is adapted to the aperture of the piston chamber, and the end of the piston rod 106 with the annular boss is built into the piston chamber, and the piston chamber is divided into an extension chamber and a retraction chamber by the annular boss, the extension chamber is close to the bottom of the piston chamber, and the retraction chamber is close to the opening of the piston chamber; the fixing sleeve 112 is a cylindrical sleeve body, which is sleeved on the outside of the rod body of the piston rod 106 and fixed on the hole wall near the open end side of the piston chamber to limit the upward distance of the annular boss; the end cover 109 is a plate body with a through hole in the center, which is sleeved on the outside of the rod body of the piston rod 106 and fixed on the outer annular surface of the main frame 101 by screws evenly arranged along the circumferential direction to close the open end of the piston chamber.

[0023] As a preferred technical solution of this embodiment, an annular sealing groove with a built-in first sealing ring 111 is opened on the outer wall of the annular boss of the piston rod 106 to form a seal between the annular boss and the piston cavity wall; an annular sealing groove with a built-in second sealing ring 110 is opened on the through hole wall of the end cover 109 to form a seal between the through hole wall of the end cover 109 and the rod wall of the piston rod 106; wherein the first sealing ring 111 and the second sealing ring 110 are preferably X-shaped sealing rings.

[0024] In order to facilitate the assembly between the main frame 101 and the main shaft 3, the main frame 101 is split into two semi-circular bodies, and T-shaped grooves are respectively provided on the two side ring walls where the two end faces meet, and the two T-shaped grooves located on the same butt joint surface are connected to form an I-shaped groove; a T-shaped locking block 103 is built in each I-shaped groove, which is composed of an embedded block and a locking bolt, the embedded block is built in one end side of the T-shaped groove, one end of the locking bolt is fixed on the embedded block, and the other end extends into the other end side of the T-shaped groove, and is limited in the other T-shaped groove by the gasket and locking nut sleeved thereon; further, by symmetrically assembling two T-shaped locking blocks 103 at each end of the two semi-circular bodies, the two semi-circular bodies of the main frame 101 can be detachably connected and fixed as a whole. Among them, the gasket is preferably a NORD-LOCK gasket to effectively prevent the screws of the locking block assembly from loosening.

[0025] In order to prevent the intermediate base assembly 1 from rotating relative to the main shaft 3 when it rotates with the main shaft 3, two cylindrical positioning pins 104 are evenly distributed in the circumferential direction on the inner ring surface of the main frame body 101, and the two are distributed on the two semi-annular bodies; specifically, the two positioning pins 104 are partially penetrated in the radial direction and fixed on the inner ring surface of the main frame body 101; correspondingly, two cylindrical positioning grooves 303 are evenly distributed on the circumferential outer wall of the main shaft 3, and the hole depth of the positioning grooves 303 is adapted to the length of the positioning pins 104 located on the outside of the main frame body 101; when the main frame body 101 and the main shaft 3 are assembled, the positioning pins 104 on the two semi-annular bodies of the main frame body 101 are respectively embedded in the positioning grooves 303 on the main shaft 3, and then connected and fixed by four T-shaped locking blocks 103, so as to realize that the intermediate base assembly 1 is tightly embraced on the outside of the main shaft 3.

[0026] A pneumatic drive structure is also provided on the main frame 101, which includes an extension drive air circuit and a retraction drive air circuit opened on the main frame 101; wherein, one end of the extension drive air circuit is respectively connected to the cavity bottom of each piston cavity, and the other end is connected to the first air circuit opened on the main shaft 3, so as to sequentially deliver the compressed air to the cavity bottom of each piston cavity (i.e. the above-mentioned extension cavity) through the first air circuit and the extension drive air circuit, thereby pushing the piston rod 106 to extend outward; one end of the retraction drive air circuit is respectively connected to the opening side of each piston cavity, and the other end is connected to the second air circuit opened on the main shaft 3, so as to sequentially deliver the compressed air to the opening side of each piston cavity (i.e. the above-mentioned retraction cavity) through the second air circuit and the retraction drive air circuit, thereby driving the piston rod 106 to retract inward.

[0027] See also Figure 1 and Figure 4In order to achieve communication with an external air source for air supply, in this embodiment, two radial ventilation grooves 102 are symmetrically provided on the inner annular surface of the main frame body 101, and the two are distributed on the two semi-annular bodies of the main frame body 101; correspondingly, two air supply passages 302 symmetrically arranged in the opposite side walls of the main shaft 3 are axially provided from the end surface of one end of the main shaft 3. Since the intermediate base assembly 1 is installed at the middle position of the main shaft 3, the other end of the air supply passage 302 is also correspondingly opened to the middle position of the main shaft 3; air outlet holes 301 penetrating to the outer wall of the main shaft 3 are respectively opened radially outward from the other ends of the two air supply passages 302; the opening positions of the two air outlet holes 301 are adapted to the opening positions of the two radial ventilation grooves 102, so that when the intermediate base assembly 1 is installed on the main shaft 3, the two radial ventilation grooves 102 on the main frame body 101 are respectively connected with the two air outlet holes 301 on the main shaft 3. As a preferred technical solution of this embodiment, an annular sealing groove with a third sealing ring 105 built in is opened at the notch of each radial ventilation groove 102 to form a seal at the junction between the radial ventilation groove 102 and the air outlet 301.

[0028] See also Figure 2 In order to realize synchronous air supply to each extension cavity, in this embodiment, two first communicating air grooves 115 are symmetrically provided on one side end surface of the two semi-circular bodies and close to the inner annular surface of the main frame body 101, and the two are distributed on the two semi-circular bodies of the main frame body 101; specifically, each first communicating air groove 115 is an arc-shaped groove, and a first input branch 116 connected to one of the radial ventilation grooves 102 and four first output branches 117 respectively connected to the bottom of the four piston chambers on the semi-circular body are provided at intervals at the bottom of the groove; a first connecting branch 118 is also provided between the two first output branches 117 located on the end sides of the two semi-circular bodies and close to the first input branch 116, which is connected through the two semi-circular bodies connected together.

[0029] Each first communicating air groove 115 is sealed with an arc-shaped pressing plate 108 at the notch, which is fixed to one side end face of the semi-circular body by screws uniformly arranged along the axial direction. As a preferred technical solution of this embodiment, an annular groove with a built-in fourth sealing ring 107 is opened at the notch of the first communicating air groove 115, so that the connection between the pressing plate 108 and the first communicating air groove 115 is sealed.

[0030] See also Figure 3In order to realize synchronous air supply to each retraction chamber, in this embodiment, two second communicating air grooves 119 are symmetrically opened on the other side annular surface of the main frame body 101 and close to the outer annular surface of the main frame body 101, and the two are distributed on the two semi-annular bodies of the main frame body 101; wherein, the second communicating air groove 119 is also an arc-shaped groove, and a second input branch 120 connected to another radial ventilation groove 102 and four second output branches 121 respectively connected to the opening sides of the four piston chambers on the semi-annular body are arranged at intervals at the bottom of the groove; a second connecting branch 122 connecting the two second communicating air grooves 119 is also opened near the second input branch 120 and located at the end side of the two semi-annular bodies, which is connected through the two semi-annular bodies connected together.

[0031] Each second communicating air groove 119 is sealed with an arc-shaped pressing plate 108 at the notch, which is fixed to the other end face of the semi-circular body by screws evenly arranged along the axial direction. As a preferred technical solution of this embodiment, an annular groove with a built-in fourth sealing ring 107 is opened at the notch of the second communicating air groove 119, so that the connection between the pressing plate 108 and the second communicating air groove 119 is sealed.

[0032] Furthermore, a radial vent groove 102, a first input branch 116, a first communicating vent groove 115, a first connecting branch 118, and four first output branches 117 together constitute an extension drive air circuit; another radial vent groove 102, a second communicating vent groove 119, a second input branch 120, a second connecting branch 122, and four second output branches 121 together constitute a retraction drive air circuit; an air supply duct 302 and an air outlet hole 301 connected thereto form a first air circuit on the main shaft 3, which is used to be connected to the radial vent groove 102 constituting the extension drive air circuit; and another air supply duct 302 and an air outlet hole 301 connected thereto form a second air circuit on the main shaft 3, which is used to be connected to the radial vent groove 102 constituting the retraction drive air circuit.

[0033] In actual application, the external gas source is connected to the first gas path and the second gas path on the main shaft 3 through pipelines, and compressed gas is supplied to the two gas paths respectively to synchronously drive the eight piston rods 106 to extend outward or retract inward.

[0034] See also Figure 1 The eight supporting flap assemblies 2 are evenly distributed along the circumferential direction of the intermediate base assembly 1 and are respectively connected to the eight groups of piston mechanisms of the intermediate base assembly 1 in a one-to-one correspondence.

[0035] See also Figure 5The supporting flap assembly 2 includes a base 201, which is a cross-shaped block; a mounting groove is opened at the center of the bottom surface of the base 201, and the rod end of the piston rod 106 is inserted into the mounting groove, and the supporting flap assembly 2 is connected to the rod end of the piston rod 106 by fastening bolts that are sequentially penetrated on the base 201 and the piston rod 106; then, the supporting flap assembly 2 is driven by the piston rod 106 to synchronously perform telescopic movement along the radial direction of the intermediate base assembly 1.

[0036] Two guide pillars 202 are arranged on the bottom surface of the base 201 along the circumferential direction of the main frame body 101, and the two are vertically fixed on the bottom surfaces of a group of opposite side protrusions of the base 201; correspondingly, two radial guide holes 113 are opened on the outer annular surface of the main frame body 101 on both sides of the piston cavity; the two guide pillars 202 can be inserted into the two guide holes 113 in a radially slidable manner to radially guide the support flap assembly 2 during the telescopic movement of the piston rod 106.

[0037] Two limiting claws 210 are arranged on the bottom surface of the base 201 along the axial direction of the main frame body 101, and the two are vertically fixed on the bottom surface of the other group of opposite side protrusions of the base 201; correspondingly, a limiting block 114 is fixed on each of the two end ring walls of the main frame body 101 located on both sides of each piston chamber; in this embodiment, the limiting claws 210 are Z-shaped, and the horizontal portions of one end of the two limiting claws 210 are fixed to the base 201 by bolts, and the horizontal portions of the other end are arranged as claws along the circumference of the main frame body 101, and the claws of the two are facing oppositely to separate They are respectively matched with the upper limit blocks 114 distributed on the end surfaces of the two ends of the main frame 101; in actual application, the claws of the two limit claws 210 are initially arranged close to the center hole of the main frame 101 when the piston rod 106 is in a retracted state; and when the piston rod 106 extends outward to the maximum length, the claws of the two limit claws 210 abut against the two limit blocks 114, that is, the two limit claws 210 are respectively blocked by the two limit blocks 114 from continuing to move radially outward; at the same time, this structural design also has the effect of preventing the piston rod from falling out of the cylinder.

[0038] As a preferred technical solution of this embodiment, an adjusting bolt 211 is provided on the claw portion of the limiting claw 210 along the radial direction of the main frame 101. In practical applications, the maximum distance that the support flap assembly 2 extends outward is adjusted by adjusting the length of the bolt 211 extending above the claw portion, so that the device can be widely applied to carcass tubes 4 of different sizes.

[0039] In addition, in the structural design of each supporting flap assembly 2, two limiting claws 210 and two limiting blocks 114 are evenly arranged on both sides of the main frame 101, so that the supporting flap assembly 2 can be evenly stressed on both sides during operation, and the operation will become smoother.

[0040] Two support plates 209 are symmetrically arranged at another group of opposite side protrusions of the base 201, so that the two are arranged along the axial direction of the main shaft 3; two spaced connection seats 203 are formed on the side where each support plate 209 and the protrusion meet, and the two connection seats 203 are embedded and matched with the adjacent side protrusions, and are hingedly connected by the optical axis 204 that passes through the two connection seats 203 and the protrusions in sequence; hard limit blocks that match the bottom surface of the support plate 209 are also provided on the end surfaces of the other two groups of opposite side protrusions, so that the two support plates 209 can be turned over to the maximum plane unfolding state. Among them, the size of the support plate 209 is adapted to the size of the tire shoulder pads attached to the two sides of the carcass tube and the distance between the two, so as to meet the support requirements of the support plate 209 for the tire shoulder pads on both sides of the carcass tube.

[0041] Both ends of each optical axis 204 extend to the outside of the two connecting seats 203, so that a torsion spring 205 is sleeved on the end of each optical axis 204; one end of each torsion spring 205 is embedded in a notch opened at the end face of the optical axis, and the other end is inserted into a notch opened on the adjacent side block 208, so that the two support plates 209 can automatically flip upward under the action of the torsion spring 205 and be set in a V-shaped flip state; preferably, a baffle 206 and a shaft retaining ring 207 are installed on both end sides of each optical axis 204 to prevent the torsion spring 205 from falling off from the end side of the optical axis 204.

[0042] As a preferred technical solution of this embodiment, two wedge-shaped pads 212 are symmetrically arranged on the adjacent side end walls of the two support plates 209, and the two are fixed on the end walls of the support plates 209 with their inclined surfaces facing each other, so that the two support plates 209 arranged in a V-shaped flip state are abutted against the top surface of the base 201 through the inclined surfaces of the wedge-shaped pads 212, while achieving buffering, ensuring that the two support plates 209 are arranged in a V-shaped flip state to avoid being unable to flip and unfold due to excessive flipping; the wedge-shaped pads 212 are preferably made of nylon.

[0043] One end side of a connecting seat 203 on each support plate 209 is processed into an arc-shaped end, and correspondingly, two reset bearings 213 are rotatably arranged on both sides of the piston mechanism on the main frame 101; wherein, the reset bearing 213 is embedded in a bearing mounting groove radially opened on the outer annular surface of the main frame 101, and is fixed to the rotating shaft along the circumferential direction of the main frame 101 to be freely rotatable; in order to balance the force on the main frame 101, the two connecting seats 203 processed into arc-shaped ends are located in the diagonal direction; the arc-shaped ends of the two connecting seats 203 and the two reset bearings 213 on the main frame 101 can form a rolling friction fit, so that the arc-shaped ends and the reset bearings 213 are matched in the process of abutting against each other to the downward pressure fit, and the two connecting seats 203 are driven to rotate in the opposite direction by forming a lever-like motion structure between the two, so that the two support plates 209 are flipped to the unfolded state.

[0044] The specific matching process between the connecting seat 203 and the reset bearing 213 is as follows: when the piston rod 106 is retracted into the piston chamber, the two support plates 209 arranged in a V-shaped flip state gradually fall back until the two connecting seats 203 are in contact with the two reset bearings 213 respectively. Fig.10 As shown; then, as the piston rod 106 continues to retract, sliding friction begins to occur between the connecting seat 203 and the reset bearing 213. Under the sliding friction force, the connecting seat 203 begins to rotate relative to the reset bearing 213 around the optical axis 204; since the relative rotation directions of the two connecting seats 203 are opposite, the two support plates 209 gradually flip over to the unfolded state, as shown in FIG. Figure 6 shown.

[0045] The working principle and working process of the capsule forming drum tire shoulder pad glue fitting auxiliary device are specifically described as follows.

[0046] The existing capsule forming drum includes a main shaft 3. The capsule forming drum tire shoulder pad glue bonding auxiliary device of this embodiment is sleeved and fixed at the middle position of the main shaft 3. The two sides of the main shaft 3 are also symmetrically sleeved with capsule drums. In the specific operation process, the carcass tube 4 is sleeved on the outside of the two capsule drums, and the bonding, shaping and tire unloading processes are completed in sequence based on the carcass tube 4. In the bonding process, the capsule forming drum tire shoulder pad glue bonding auxiliary device of this embodiment swells outward and is centrally supported on the inner wall surface of the carcass tube 4 to assist in completing the bonding.

[0047] See also Figure 6 In the initial state, the capsule forming drum tire shoulder pad glue fitting auxiliary device is in the loading position; specifically, the piston rods 106 of the eight piston assemblies on the intermediate base assembly 1 are all in the retracted state; the two connecting seats 203 of each supporting flap assembly 2 are respectively against the reset bearings 213 located on both sides of the piston mechanism, so that the support plates 209 on both sides are in a fully expanded state; at this time, the outer diameter of the annular body formed by the eight supporting flap assemblies 2 on the outer periphery of the intermediate base assembly 1 is the smallest, and is smaller than the outer diameter of the capsule drums on both sides, so that the carcass tube 4 can be smoothly mounted on the outside of the two capsule drums to complete the loading process.

[0048] See also Figure 7 After the loading is completed, the capsule forming drum tire shoulder pad glue bonding auxiliary device is transformed from the loading position to the bonding position; specifically, the piston rods 106 of the eight piston assemblies on the intermediate base assembly 1 are synchronously extended outward under the action of compressed air until the limiting claws 210 of each supporting flap assembly 2 hit the limiting block 114 and reach the maximum extended length position; because each supporting flap assembly 2 is surrounded by the tire tube 4 in the circumferential direction during the process of extending outward with the piston rod 106, the support plates 209 on both sides of each supporting flap assembly 2 remain in a fully expanded state, and the support plates 209 are tightly against the inner wall of the tire tube 4, which effectively assists the subsequent tire shoulder pad glue bonding process of the tire tube 4.

[0049] See also Figure 8 and Fig. 9 After the shoulder pad glue bonding is completed, the capsule forming drum shoulder pad glue bonding auxiliary device is immediately transformed from the bonding position to the shaping position; specifically, the piston rods 106 of the eight piston assemblies on the middle base assembly 1 maintain the current outward extended state under the action of compressed air, and the capsule drums on both sides move synchronously along the main shaft 3 toward the center position of the main shaft, so that the tire body tube 4 gathers toward the middle and expands; because the inner diameter of the tire body tube 4 also increases during the expansion process and separates from the support plate 209, at this time, the support plates 209 on both sides of each support flap assembly 2 are flipped upward under the action of the torsion spring 205, giving the capsule drums on both sides a larger axial movement space, avoiding the support plates 209 of the support flap assembly 2 from interfering with the capsule drum, thereby affecting the tire embryo shaping effect.

[0050] See also Fig. 9 and Fig.10 , the embryo is shaped, and the capsule forming drum tire shoulder pad glue fitting auxiliary device is immediately transformed from the shaping position to the tire unloading position (that is, the initial loading position); specifically, the piston rods 106 of the eight piston assemblies on the intermediate base assembly 1 are synchronously retracted inward under the action of compressed air, and drive each supporting flap assembly 2 to fall back to the side of the intermediate base assembly 1; during the falling back process of each supporting flap assembly 2, the connecting seat 203 contacts the reset bearing 213 at the corresponding position and generates sliding friction, so that the support plate 209 connected to the connecting seat 203 is flipped and unfolded again, and is in the fully unfolded state of the initial state, that is, Figure 6 The status shown is waiting for the next incoming material to be loaded onto the drum.

[0051] Based on the above process description, the capsule forming drum tire shoulder pad glue bonding auxiliary device cycles back and forth in sequence according to the loading position, bonding position, shaping position, and tire unloading position (i.e., the loading position).

Claims

1. A capsule forming drum tire shoulder pad glue fitting auxiliary device, characterized in that: The invention comprises an intermediate base assembly (1), which comprises a main frame (101) sleeved on a main shaft (3) of a forming drum, a plurality of piston cavities are circumferentially opened on the main frame (101) along the radial direction of the main shaft (3), a piston mechanism is arranged in the piston cavity, and the piston mechanism comprises a piston rod (106) which performs telescopic movement in the piston cavity along the radial direction of the main shaft (3); a pneumatic drive structure is also arranged on the main frame (101), which comprises an extension drive air circuit for driving all piston rods (106) to extend outward synchronously and a retraction drive air circuit for driving all piston rods (106) to retract inward synchronously; a plurality of support flap assemblies (2) are respectively arranged at each piston mechanism; the support flap assembly (2) comprises a base (21) vertically fixed to the rod end of the piston rod (106); 01), two support plates (209) are symmetrically arranged on both sides of the base (201) along the main axis (3); two connecting seats (203) are provided on one side of the support plate (209), and the two are hingedly connected to the base (201) via an optical axis (204), and the two support plates (209) are arranged in a V-shaped flip state through a torsion spring (205) arranged on the optical axis (204); the end sides of the two connecting seats (203) located in the diagonal direction are processed into arc ends, and the two and the reset bearings (213) rotatably arranged on both sides of the piston mechanism on the main frame (101) can form a rolling friction fit when they are in contact with each other, so as to drive the two connecting seats (203) to rotate in the opposite direction, so that the two support plates (209) are flipped to a planar unfolded state.

2. The capsule forming drum tire shoulder pad glue fitting auxiliary device according to claim 1 is characterized in that: The piston mechanism further comprises a fixing sleeve (112) and an end cover (109); an annular boss is provided at one end of the piston rod (106) and is built into the piston cavity to separate the extension cavity and the retraction cavity; the fixing sleeve (112) is sleeved on the outside of the piston rod (106) and fixed on the inner wall of the piston cavity; the end cover (109) is sleeved on the outside of the rod end of the piston rod (106) and closes the opening of the piston cavity.

3. The capsule forming drum tire shoulder pad glue fitting auxiliary device according to claim 2, characterized in that: A sealing ring is provided between the outer wall of the annular boss of the piston rod (106) and the wall of the radial mounting hole, and between the wall of the through hole of the end cover (109) and the rod wall of the piston rod (106).

4. The capsule forming drum tire shoulder pad glue fitting auxiliary device according to claim 1, characterized in that: The main frame body (101) is split into two semi-annular bodies, and the two end faces are connected by a locking block (103) and are tightly clamped to the outside of the main shaft (3).

5. The capsule forming drum tire shoulder pad glue fitting auxiliary device according to claim 4, characterized in that: A plurality of positioning pins (104) are arranged at intervals on the inner annular surface of the main frame (101), and a plurality of matching positioning grooves (303) are correspondingly provided on the circumferential outer wall of the main shaft (3), so that the main frame (101) is sleeved on the outer side of the main shaft (3) in a manner that the plurality of positioning pins (104) thereon are respectively inserted into the positioning grooves (303) on the main shaft (3).

6. The capsule forming drum tire shoulder pad glue fitting auxiliary device according to claim 1, characterized in that: In the pneumatic drive structure, one end of the extension drive air circuit is respectively connected to the bottom of each piston cavity, and the other end is located on the inner annular surface of the main frame body (101) and is connected to a first air circuit opened on the side wall of the main shaft (3); one end of the retraction drive air circuit is respectively connected to the opening side of each piston cavity, and the other end is located on the inner annular surface of the main frame body (101) and is connected to a second air circuit opened on the side wall of the main shaft (3).

7. The capsule forming drum tire shoulder pad glue fitting auxiliary device according to claim 1, characterized in that: Guide holes (113) are provided on both sides of each piston mechanism on the main frame (101), and a guide column (202) is provided at the bottom of the base (201). The guide column (202) is slidably inserted in the guide hole (113) to radially guide the support flap assembly (2).

8. The capsule forming drum tire shoulder pad glue fitting auxiliary device according to claim 1, characterized in that: Limiting blocks (114) are arranged on both sides of each piston mechanism on the main frame (101), and a limiting claw (210) is arranged at the bottom of the base (201). The bottom claw of the limiting claw (210) can abut against the limiting block (114) when the piston rod (106) extends outward, so as to limit the maximum extension length of the piston rod (106).

9. The capsule forming drum tire shoulder pad glue fitting auxiliary device according to claim 1, characterized in that: An adjusting bolt (211) is radially penetrated and fixed on the claw portion of the limiting claw (210) along the main frame (101), and the adjusting bolt (211) can abut against the limiting block (114) as the piston rod (106) extends outward.

10. The capsule forming drum tire shoulder pad glue fitting auxiliary device according to claim 1, characterized in that: Wedge-shaped pads (212) are provided on adjacent side end walls of the two support plates (209), and the two support plates (209) are arranged in a manner of facing each other with inclined surfaces, so that the two support plates (209) abut against the top of the base (201) through the wedge-shaped pads (212) and are arranged in a V-shaped flipped state.

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