Working device capable of changing stations and tire body joint synchronous sewing device

Abstract

The invention relates to the technical field of tire forming, and discloses a working device capable of changing stations and a tire carcass joint synchronous sewing device. The working device capable of changing the stations comprises a base and at least one working device body connected to the base in a sliding mode, the working device body can generate angular displacement to change the stations, and therefore the working device body can work on the annular workpiece on the centripetal side or the centrifugal side of the working device body. The working device and the base comprise a first connecting end and a second connecting end which are arranged on the working device and the base, so that when the working device is driven by power, the working device can generate displacement relative to the base under the interference effect of the first connecting end and the second connecting end. The tire carcass joint synchronous sewing device comprises the working device capable of changing the stations. In the tire body joint sewing operation, the tire body drum does not need to be frequently rotated for positioning the sewing angle and sewing back and forth, automatic changing of the sewing angle and simultaneous multi-angle sewing can be achieved, and the tire attaching efficiency is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of tire molding, in particular to a work device with changeable work stations and a synchronous splicing device for tire body joints. BACKGROUND

[0002] In the tire manufacturing process, tire blank bonding is one of the key processes. In particular, in the production of semi-steel one-step, semi-steel two-step, full-steel one-step and full-steel two-step tires, the inner liner and multiple layers of cord fabric and other sheet-shaped body materials need to be bonded in turn on a rotating tire body drum. After bonding, the joints of each layer of material will form a seam. In order to ensure that the seam is firmly overlapped and to avoid air being trapped between the layers, the seam must be rolled and spliced. This process directly affects the structural integrity, durability and final quality of the tire. If not handled properly, it can easily cause defects such as air pockets after vulcanization.

[0003] Currently, the industry generally uses a dedicated splicer to perform joint rolling. Its typical working method is: driving the rolling wheel to axially roll the inner liner composite joint on the tire body drum. After completing the inner liner seam rolling, the tire body drum is driven to rotate by a servo motor, moving the cord joint to the splicer station, and then repeating the rolling process. For multiple layers of cord fabric structure, the "drum rotation positioning-rolling" cycle needs to be repeated multiple times.

[0004] However, the above-mentioned existing splicing device and method have obvious limitations: Each layer of joint needs independent positioning and rolling process. Especially when bonding multiple layers of cord fabric, the splicer needs to move back and forth frequently, and the tire body drum also needs to be started and stopped multiple times and adjusted in angle, significantly increasing the single tire production cycle and restricting the overall efficiency of the building machine. If some of the joint special rolling is omitted in pursuit of efficiency, and only relies on the circumferential rolling during bonding, it is difficult to completely eliminate the air bubbles trapped inside the joint, and it is easy to form strip-shaped or granular cavities, resulting in quality problems such as bulging after tire vulcanization.

[0005] Therefore, the existing technology cannot achieve efficient and flexible tire blank bonding production while ensuring the quality of joint rolling, which has become a common bottleneck restricting the improvement of tire molding process. SUMMARY

[0006] The present application aims to solve at least one of the technical problems existing in the prior art. To this end, one object of the present application is to provide a work device with changeable work stations; the device can arrange the number and distribution angle of the tire body layer joints in advance according to the process, adjust the splicing angle, and realize synchronous splicing of multiple joints and multiple angles of the tire body.

[0007] Another object of the present application is to provide a synchronous splicing device for tire body joints.

[0008] The application provides a work device with variable work positions, which comprises a base and at least one work device slidably connected to the base. The work device and the base comprise first connecting ends and second connecting ends arranged thereon, so that the work device can be displaced relative to the base under the interference of the first connecting ends and the second connecting ends when the work device is driven by a power source.

[0009] The purpose of the arrangement is to drive the work device to move relative to the base through the interference of the first connecting ends and the second connecting ends, so as to change the spatial angle of the work position of the work device.

[0010] In some examples of the application, the first connecting end is a gear arranged on the work device, and the second connecting end is a rack engaged with the gear, and the rack is an arc-shaped rack.

[0011] The purpose of the arrangement is that the engagement of the gear and the rack enables the work device to change the angle displacement along a preset circumferential path, and the motion track is consistent with the circular tire body drum.

[0012] In some examples of the application, the work device comprises a driving mechanism for outputting rotating power, and the gear is connected to the output end of the driving mechanism.

[0013] The purpose of the arrangement is to arrange the driving mechanism such as a servo motor on the work device and directly drive the gear, so as to automatically change the work angle.

[0014] In some examples of the application, the work device and the base comprise a circular arc guide rail arranged thereon and a guide block slidably connected to the circular arc guide rail.

[0015] The purpose of the arrangement is that the circular arc guide rail and the guide block are used to guide the angle displacement of the work device, so as to enhance the stability of the work device during the change of the angle displacement, prevent the work device from deviating or vibrating under stress, and ensure the smoothness and quality consistency of the rolling work.

[0016] In some examples of the present application, the base comprises a bottom plate, the working device has a plurality of circumferentially distributed racks, and the plurality of circumferentially distributed circular arc guide rails correspond to the plurality of racks.

[0017] The purpose of such an arrangement is to arrange a plurality of independent working devices (such as cord stitching heads) with autonomous power and precise angle conversion capability circumferentially on the base, so that the device can be arranged once or in advance to cope with multiple stitching according to the actual number and distribution angle of the tire body drum joints.

[0018] According to the tire body joint synchronous stitching device provided by the present application, the working device is one or both of a cord joint stitching device or an inner liner joint stitching device; or, the working device is a cord joint stitching device, and the base is further provided with an inner liner joint stitching device.

[0019] The purpose of such an arrangement is that the synchronous stitching device can simultaneously cover the stitching needs of the inner liner and the cord joint, and can realize the sequential or cooperative processing of the inner liner and the cord joint under one-time clamping positioning, thereby further compressing the process time.

[0020] In some examples of the present application, the cord joint stitching device comprises a cord bottom plate, the cord bottom plate is slidably connected to the base, the cord joint stitching device further comprises a cord primary cylinder whose cylinder body is connected to the cord bottom plate, a cord secondary cylinder whose cylinder body is connected to the output end of the cord primary cylinder, and a cord pressure roller assembly connected to the output end of the cord secondary cylinder.

[0021] The purpose of such an arrangement is that the cord primary cylinder and the cord secondary cylinder work cooperatively, and are used in a multi-stage nested telescopic manner to realize large stroke movement to approach the stitching position and small stroke to provide stitching pressure; the cord pressure roller assembly uses a plurality of rolling wheels for rolling stitching, and according to the characteristics of the cord joint, the pressure of the rolling wheels can be adjusted in real time to achieve better rolling stitching joint effect.

[0022] In some examples of the present application, the cord joint stitching device further comprises a cord buffer connected to the cord bottom plate, and a cord limiting block corresponding to the cord buffer, which can adjust the relative position along the stroke direction of the cord primary cylinder and can displace with the output end of the cord primary cylinder.

[0023] The purpose of such an arrangement is that the adjustable cord limiting block allows flexible setting of the avoidance stroke end of the cord primary cylinder to adapt to tire body drums of different diameters; and the cord buffer provides flexible buffering at the stroke end to effectively absorb the kinetic energy of the moving parts and avoid the risk of damage to the tire body drum or the material already attached caused by hard impact.

[0024] In some examples of the present application, the inner liner joint stitching device comprises an inner liner base plate connected to the base in a sliding manner, and further comprises an inner liner primary cylinder connected to the base and having an output end connected to the inner liner base plate, an inner liner secondary cylinder having a cylinder connected to the output end of the inner liner primary cylinder, and an inner liner pressure roller assembly connected to the output end of the inner liner secondary cylinder.

[0025] The purpose of such arrangement is that the inner liner primary cylinder and the inner liner secondary cylinder work in cooperation, and are used in a multi-stage nested telescopic manner to achieve large stroke movement to approach the stitching position and small stroke to provide stitching pressure; the pressure roller assembly uses a plurality of floating rolling pieces to roll and stitch, and can automatically compress the internal elastic component according to the rolling surface, so as to increase the rolling area and adapt to the ups and downs of the joint to the greatest extent to achieve better rolling and stitching effect of the joint.

[0026] In some examples of the present application, the inner liner joint stitching device further comprises an inner liner buffer connected to the base, and an inner liner limit block corresponding to the inner liner buffer, which can adjust the relative position along the stroke direction of the inner liner primary cylinder and can displace with the output end of the inner liner primary cylinder.

[0027] The purpose of such arrangement is that the adjustable inner liner limit block allows flexible setting of the avoidance stroke end of the inner liner primary cylinder to adapt to the tire body drum of different diameters, and the inner liner buffer provides flexible buffering at the stroke end to effectively absorb the kinetic energy of the moving part and avoid the risk of damage to the tire body drum or the material that has been attached caused by hard impact.

[0028] Additional aspects and advantages of the present application will be made apparent from the following description. BRIEF DESCRIPTION OF DRAWINGS

[0029] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or the prior art description. Obviously, the drawings in the following description are some embodiments of the present application, and other drawings can also be obtained by those skilled in the art without creative labor.

[0030] Figure 1 It is a front view of the tire body joint synchronous stitching device in the embodiment of the present application. Figure 2 It is a perspective view of the cord joint stitching device in the embodiment of the present application in the connected state with the base. Figure 1 ; Figure 3 It is a perspective view of the cord joint stitching device in the embodiment of the present application in the connected state with the base. Figure 2 ; Figure 4 This is a perspective view of the lining joint sewing device connected to the base in an embodiment of the present invention.

[0031] Explanation of reference numerals in the attached figures: Base 1, rack 11, base plate 12, arc guide rail 13; 2. Cord splice sewing device, gear 21, drive mechanism 22, servo motor 221, reducer 222, guide block 23, cord bottom plate 24, cord first-stage cylinder 25, cord second-stage cylinder 26, cord pressure roller assembly 27, cord buffer 28, cord limit block 29. The inner lining joint sewing device 3, the inner lining plate 31, the inner lining primary cylinder 32, the inner lining secondary cylinder 33, the inner lining pressure roller assembly 34, the floating rolling plate 341, the roller pressing base 342, the spring 343, the inner lining buffer 35, and the inner lining limiting block 36. Detailed Implementation

[0032] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0033] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential," etc., indicating orientation or positional relationships, are based on the orientation or positional relationships shown in the accompanying drawings and are only for the convenience of describing the invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the invention. Furthermore, features defined with "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, unless otherwise stated, "a plurality of" means two or more.

[0034] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0035] Embodiments of the present invention are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0036] The following is for reference. Figures 1-4 The illustration shows a tire carcass joint synchronous stitching device provided in an embodiment of the present invention.

[0037] For details, please see the appendix. Figure 1 This is a front view of a synchronous stitching device for tire carcass joints. The synchronous stitching device includes a base 1 and two working devices slidably connected to the base 1. The working devices can generate angular displacement to change the working position, allowing the working devices to work on the annular workpiece on their centripetal or centrifugal side. The working device and the base 1 include a first connecting end and a second connecting end disposed on both, so that when the working device is driven by power, the working device can generate displacement relative to the base 1 under the interference of the first connecting end and the second connecting end.

[0038] Please continue reading the appendix. Figure 1 The two working devices are specifically a curtain joint sewing device 2; an inner lining joint sewing device 3 is also provided on the base 1; the inner lining joint sewing device 3 cannot produce angular displacement relative to the base 1, while the two curtain joint sewing devices 2 can produce angular displacement relative to the base 1 to adapt to different joint positions.

[0039] Please see the appendix Figures 1-2 , attached Figure 2 A three-dimensional view of the connection between the fabric joint sewing device 2 and the base 1. Figure 1 The first connecting end is a gear 21 set on the curtain joint sewing device 2, and the second connecting end is a rack 11 that meshes with the gear 21. The rack 11 is an arc-shaped rack 11 and is set on the base 1. Specifically, the base 1 includes a base plate 12, which is a basically annular plate. Two fabric joint sewing devices 2 and an inner lining joint sewing device 3 are distributed along the circumference of the plate. The sewing ends of the three devices all point to the centripetal end of the annular plate. When sewing is performed, the tire drum is located inside the annular plate so that the fabric joint sewing device 2 and the inner lining joint sewing device 3 can perform sewing operations on it. Correspondingly, there are also two arc-shaped toothed racks 11, which follow the curtain joint sewing device 2 and correspond one-to-one with the curtain joint sewing device 2. The two arc-shaped toothed racks 11 are formed on a circumference, and the teeth of the toothed racks 11 are formed on the inner side of the circumference. The circumference is concentrically set with the annular plate. The inner lining joint sewing device 3 is set between the two curtain joint sewing devices 2.

[0040] Please continue reading the appendix. Figure 2 Gear 21 is connected to the concave side, i.e. the inner side, of the arc-shaped rack 11.

[0041] Please see the appendix Figures 2-3 , Figure 3 A three-dimensional view of the connection between the fabric joint sewing device 2 and the base 1. Figure 2 The fabric joint sewing device 2 includes a drive mechanism 22 for outputting rotational power, and a gear 21 is connected to the output end of the drive mechanism 22. Specifically, the drive mechanism 22 includes a servo motor 221 and a reducer 222. The output end of the servo motor 221 is connected to the input end of the reducer 222, and the gear 21 is connected to the output end of the reducer 222. The structure of using the servo motor 221 and the gear 21 allows the sewing position and angular displacement distance to be laid out before the sewing operation begins, providing a foundation for automated sewing.

[0042] Please continue reading the appendix. Figure 1 Appendix Figure 3 The base 1 also includes an arc guide rail 13 fixed on the base plate 12, corresponding one-to-one with the arc rack 11 and closely fitting the outer side of the arc rack 11. A guide block 23 is provided at the bottom of the curtain joint sewing device 2. The guide block 23 is connected to the arc guide rail 13 to guide the angular displacement of the curtain joint sewing device 2.

[0043] Please see the appendix Figures 2-3 The fabric joint sewing device 2 includes a fabric base plate 2412, which is slidably connected to the base 1. The fabric joint sewing device 2 also includes a primary fabric cylinder 25 whose cylinder body is connected to the fabric base plate 2412, a secondary fabric cylinder 26 whose cylinder body is connected to the output end of the primary fabric cylinder 25, and a fabric pressure roller assembly 27 connected to the output end of the secondary fabric cylinder 26. The fabric pressure roller assembly 27 uses several rolling rollers to perform rolling sewing.

[0044] Please see the appendix Figures 2-3The fabric joint sewing device 2 also includes a fabric buffer 28 connected to the fabric base plate 2412, and a fabric limiting block 29 corresponding to the fabric buffer 28, which can be adjusted relative to the fabric primary cylinder 25 along the stroke direction and can be displaced with the output end of the fabric primary cylinder 25.

[0045] Please see the appendix Figure 4 The figure shows a perspective view of the lining joint sewing device 3 connected to the base 1. The lining joint sewing device 3 includes an inner lining plate 3112, which is slidably connected to the base 1. The lining joint sewing device 3 also includes a primary lining cylinder 32 whose cylinder body is connected to the base 1 and whose output end is connected to the inner lining plate 3112, a secondary lining cylinder 33 whose cylinder body is connected to the output end of the primary lining cylinder 32, and an inner lining pressure roller assembly 34 connected to the output end of the secondary lining cylinder 33.

[0046] Please continue reading the appendix. Figure 4 The inner lining joint sewing device 3 also includes an inner lining buffer 35 connected to the base 1, and an inner lining limiting block 36 corresponding to the inner lining buffer 35, whose relative position can be adjusted along the stroke direction of the inner lining primary cylinder 32, and which can be displaced with the output end of the inner lining primary cylinder 32.

[0047] Please continue reading the appendix. Figure 4 The inner lining pressure roller assembly 34 includes several closely arranged floating pressure plates 341. The inner lining pressure roller assembly 34 also includes a pressure roller base 3421. The output end of the inner lining secondary cylinder 33 is connected to the pressure roller base 3421. The floating pressure plates 341 are connected to the pressure roller base 3421 by a shaft, and a spring 343 is abutting between the two. The spring 343 can be automatically compressed according to the rolling surface, thereby increasing the rolling area and maximizing the adaptation to the undulating shape of the joint to achieve a better rolling and stitching joint effect.

[0048] Other components of the tire carcass joint synchronous stitching device according to embodiments of the present invention, such as cylinders, servo motors, reducers, etc., and their operation are known to those skilled in the art and will not be described in detail here.

[0049] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0050] Although embodiments of the invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A work device of a changeable station, characterized in that, The device comprises a base and at least one working device connected to the base by sliding, the working device can produce angular displacement to change the working position, so that the working device can work on the annular workpiece on the centripetal side or the centrifugal side; The working device and the base comprise a first connecting end and a second connecting end arranged on both, so that when the working device is driven by power, the working device can produce displacement relative to the base under the interference of the first connecting end and the second connecting end.

2. The convertible station work device of claim 1, wherein, The first connecting end is a gear arranged on the working device, the second connecting end is a rack engaged with the gear, and the rack is an arc-shaped rack.

3. The convertible station work device of claim 2, wherein, The working device comprises a driving mechanism for outputting rotary power, and the gear is connected to the output end of the driving mechanism.

4. A changeable station work device according to claim 2 or 3, characterized in that The working device and the base comprise a circular arc guide rail and a guide block connected to the circular arc guide rail by sliding.

5. The convertible station work device of claim 4, wherein, The base comprises a bottom plate, and the working device has a plurality of circumferentially distributed arc-shaped racks and a plurality of circumferentially distributed circular arc guide rails.

6. A tyre carcass joint synchronous stitching device, characterised in that, The device comprises a working device capable of changing the working position according to any one of claims 1-5, wherein the working device is one or both of a cord splice sewing device or an inner liner splice sewing device. Alternatively, the working device is a cord splice sewing device, and the base further comprises an inner liner splice sewing device.

7. The tire carcass joint synchronous sewing apparatus according to claim 6, characterized in that, The cord splice sewing device comprises a cord bottom plate connected to the base by sliding, a first-stage cord cylinder with its cylinder connected to the cord bottom plate, a second-stage cord cylinder with its cylinder connected to the output end of the first-stage cord cylinder, and a cord pressure roller assembly connected to the output end of the second-stage cord cylinder.

8. The tire carcass joint synchronous sewing apparatus according to claim 7, characterized in that, The cord splice sewing device further comprises a cord buffer connected to the cord bottom plate, and a cord limiting block corresponding to the cord buffer, which can adjust the relative position along the stroke direction of the first-stage cord cylinder and can displace with the output end of the first-stage cord cylinder.

9. The tire carcass joint synchronous sewing apparatus according to claim 6, characterized in that, The inner liner splice sewing device comprises an inner liner bottom plate connected to the base by sliding, a first-stage inner liner cylinder with its cylinder connected to the base and its output end connected to the inner liner bottom plate, a second-stage inner liner cylinder with its cylinder connected relative to the output end of the first-stage inner liner cylinder, and an inner liner pressure roller assembly connected to the output end of the second-stage inner liner cylinder.

10. The tire carcass joint synchronous sewing apparatus according to claim 9, characterized in that, The inner liner splice sewing device further comprises an inner liner buffer connected to the base, and an inner liner limiting block corresponding to the inner liner buffer, which can adjust the relative position along the stroke direction of the first-stage inner liner cylinder and can displace with the output end of the first-stage inner liner cylinder.

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