Bead-apex sewing device, bead-apex station and method for sewing apex to bead

Abstract

The present invention relates to a bead-apex sewing device, a bead-apex station and a method for sewing an apex to a bead wherein the bead-apex sewing device comprises: at least one first sewing member and at least one second sewing member, the bead-apex sewing device comprises: a sewing driver for driving rotation of at least one first sewing member and at least one second sewing member about a central axis; and a control unit operatively connected to the suture driver wherein the control unit is configured to control the suture driver to rotate the at least one first suture member and the at least one second suture member in a first rotational direction, and subsequently rotating the at least one first stitching member and the at least one second stitching member in a second rotational direction opposite the first rotational direction.

Description

[0001] This application is a divisional application of a patent application with an application date of April 1, 2022, application number 202210348407.8, and invention name "Bead-triangle rubber strip sewing device, bead-triangle rubber strip station and method for sewing the triangular rubber strip to the tire bead". Technical Field

[0002] The invention relates to a bead-apex strip sewing device, a bead-apex strip station and a method for sewing an apex strip to a tire bead. Background Art

[0003] EP 1755874 B1 discloses a pressing station having a plurality of circumferentially spaced apart pressing members mounted to move radially to press the annular base portion of the apex to the bead core ring. The pressing members may be provided at the free end of each pressing member with roller means resiliently mounted by spring means.

[0004] The same document also discloses an alternative pressing device in the form of a rotatable pressing mechanism having an arm rotatable in the circumferential direction and a pressing wheel at the end of the arm which, when rotating, presses the conical portion of the apex against the bead. Summary of the invention

[0005] The object of the present invention is to provide a bead-apex stitching device, a bead-apex stitching station and a method for stitching an apex stitching strip to a tire bead, wherein the cycle time of the bead-apex stitching device can be greatly reduced.

[0006] According to a first aspect, the present invention provides a bead-to-apex rubber sewing device for sewing a apex rubber strip to a tire bead, wherein the bead-to-apex rubber sewing device includes: at least one first sewing member, which is used to sew the apex rubber strip to the tire bead; and at least one second sewing member, which is used to sew the apex rubber strip to the tire bead in a manner different from the first sewing member, wherein the at least one first sewing member and the at least one second sewing member can rotate together in a circumferential direction around a central axis, wherein the bead-to-apex rubber sewing device includes: a sewing drive, which is used to drive the at least one first sewing member and the at least one second sewing member to rotate around the central axis; and a control unit operatively connected to the sewing drive, wherein the control unit is configured to control the sewing drive to rotate the at least one first sewing member and the at least one second sewing member in a first rotational direction, and then rotate the at least one first sewing member and the at least one second sewing member in a second rotational direction opposite to the first rotational direction.

[0007] By rotating the at least one first sewing member and the at least one second sewing member back and forth, the at least one first sewing member can be returned to its initial position and immediately prepared for a subsequent sewing operation. Therefore, the cycle time of the bead-apex sewing device can be greatly reduced.

[0008] In one embodiment, the first group is rotatable as a whole around the central axis, wherein the bead-apex suturing device includes a suturing drive and a control unit, wherein the suturing drive is used to drive the first group to rotate around the central axis, and the control unit is operatively connected to the suturing drive, wherein the control unit is configured to control the suturing drive to rotate the first group across a first rotation range in a first rotation direction and then rotate the first group across a second rotation range in a second rotation direction opposite to the first rotation direction, wherein the first rotation range of the first group is less than one turn. In another embodiment, the second rotation range is less than one turn.

[0009] By rotating the first set back and forth over less than one revolution, tangling of control lines such as electrical cables and pneumatic tubes can be prevented.

[0010] According to a second aspect, the present invention provides a bead-apex station, including a bead-apex sewing device for sewing an apex strip to a bead, wherein the bead-apex sewing device includes: at least one first sewing member for sewing the apex strip to the bead and at least one second sewing member for sewing the apex strip to the bead in a manner different from the first sewing member; and a bead retainer for concentrically retaining the bead to the bead-apex sewing device, wherein the bead retainer is rotatable in a circumferential direction around a central axis, wherein the bead-apex station includes a bead retainer driver for driving the bead retainer to rotate and a control unit operatively connected to the bead retainer driver, wherein the control unit is configured to control the bead retainer driver to rotate the bead retainer in a first rotational direction over a first rotational range, and then rotate the bead retainer in a second rotational direction opposite to the first rotational direction over a second rotational range. This has the same technical advantages as the previously discussed embodiment in which the grouped sewing members are rotated.

[0011] In one embodiment, the first rotation range is less than one turn. In another embodiment, the second rotation range is less than one turn.

[0012] By rotating the first set back and forth through less than one revolution, control lines, such as cables and pneumatic tubes, can be prevented from becoming tangled.

[0013] According to a third aspect, the present invention provides a method for sewing an apex strip to a tire bead using the tire bead-apex strip sewing device according to the first aspect of the present invention, wherein the method comprises the following steps:

[0014] a) first sewing the apex to the bead using at least one first sewing member by rotating the at least one first sewing member and the at least one second sewing member in a first rotational direction; and

[0015] b) subsequently sewing the apex to the bead using the at least one second sewing member by rotating the at least one first sewing member and the at least one second sewing member in a second rotational direction.

[0016] The method according to the third aspect of the invention relates to a practical implementation of the bead-apex stitching device according to the first aspect of the invention and therefore has technical advantages which are not repeated below.

[0017] In one embodiment, step a) involves rotating the first group in a first rotational direction about the central axis over a first rotational range, wherein step b) involves rotating the first group in a second rotational direction opposite to the first rotational direction over a second rotational range, wherein the first rotational range is less than one revolution. In another embodiment, the second rotational range is less than one revolution.

[0018] According to a fourth aspect, the present invention provides a method for sewing an apex bead to a bead using the bead-apex bead station according to the second aspect of the present invention, wherein the method comprises the following steps:

[0019] a) first sewing the apex strip to the bead using at least one first sewing member while rotating the bead retainer in a first rotational direction over a first rotational range; and

[0020] b) subsequently sewing the apex to the bead using at least one second sewing member while rotating the bead retainer over a second rotational range in a second rotational direction opposite to the first rotational direction.

[0021] The method according to the fourth aspect of the invention relates to a practical implementation of the bead-apex station according to the second aspect of the invention and therefore has technical advantages which will not be repeated below.

[0022] In one embodiment, the first rotation range is less than one turn. In another embodiment, the second rotation range is less than one turn.

[0023] Obviously, any embodiment of the aforementioned aspects of the present invention may be combined with the bead-apex stitching device according to the first aspect of the present invention.

[0024] Where possible, the various aspects and features described and shown in this specification may be applied separately. These individual aspects, in particular the aspects and features described in the accompanying dependent claims, may become the subject of divisional patent applications. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] The present invention will be explained based on the exemplary embodiments shown in the accompanying drawings, in which:

[0026] Figure 1 It shows a front view of a bead-apex strip station with a bead-apex strip sewing device according to a first embodiment of the present invention;

[0027] Figure 2 and Figure 3 They are shown according to Figure 1 A cross-sectional view of the tire bead-triangular rubber strip sewing device along line II-II and line III-III;

[0028] Figure 4 and Figure 5 shows the control according to Figure 1 The control scheme of the bead-apex rubber strip joint device;

[0029] Figure 6 The front view of the tire bead-apex strip station is shown, and Figure 1 Compared with the bead-apex rubber strip in the embodiment of the present invention, the bead-apex rubber strip station is adjusted to accommodate the bead-apex rubber strip with a smaller diameter;

[0030] Figure 7 Shown according to Figure 1 A side cross-sectional view of the bead-apex station; and

[0031] Figure 8 A front view of a replacement bead-apex strip station with a replacement bead-apex strip sewing device according to a second embodiment of the present invention is shown. DETAILED DESCRIPTION

[0032] Figure 1 , Figure 6 and Figure 7 A bead-apex station 1 according to a first exemplary embodiment of the invention is shown. The bead-apex station 1 may be a separate station or part of a multi-station tire building machine, such as a turntable (not shown) known per se.

[0033] The bead-apex station 1 includes one or more bead retainers 10 for retaining a bead core or bead 90 in an annular or ring-shaped configuration about a central axis S. An elastomeric filler or apex is or has been concentrically applied around the bead 90. The bead-apex station 1 is configured to press or sew an apex 91 onto the bead 90 to form a so-called bead-apex 9. The bead-apex 9 can be used in a subsequent stage of tire forming to form a green tire or an unvulcanized tire. In this exemplary embodiment, the bead-apex station 1 includes a bead retainer frame 11 for carrying one or more bead retainers 10; and a bead retainer driver 12 for driving one or more bead retainers 10 and / or the bead retainer frame 11 to rotate about the central axis S.

[0034] like Figure 2 and Figure 3 As best shown in FIG. 1 , the apex 91 has a body of triangular cross-section defining a base 92 and an end 93. The apex 91 is applied around the bead 90 with the base 92.

[0035] like Figure 1 As shown, the bead-apex station 1 also includes a bead-apex sewing device 2 for sewing the apex 91 to the bead 90. The bead-apex sewing device 2 includes a first group of first sewing members 3, in particular first rollers 3, which are distributed in the circumferential direction C around the central axis S. The first sewing members 3 can alternatively be formed by another suitable sewing device, such as a brush, a pad, a finger, a spoon, etc. Each first roller 3 can rotate around the corresponding first roller axis R1. In this exemplary embodiment, the first group consists of three first rollers 3, although embodiments with two first rollers 3 or more than three first rollers 3 are also considered to be within the scope of the present invention. Preferably, the first rollers 3 are evenly distributed, i.e., equiangularly and / or spaced apart at fixed angular intervals X. In this particular example, the first rollers 3 are spaced apart at an angular interval X of 120 degrees.

[0036] The bead-apex station 2 also comprises a second set of second stitching members 4, in particular second rollers 4. The first stitching members 3 may alternatively be formed by another suitable stitching device, such as a brush, a pad, a finger, a spoon, etc. In this example, the second stitching members 4 alternate with the first rollers 3 of the first set in the circumferential direction C. In other words, considered in the circumferential direction C, the bead-apex station 2 has a first set of stitching members 3 and a second set of stitching members 4 distributed in the circumferential direction C in an alternating pattern, i.e., a repeated set of one of the first stitching members 3 and one of the second stitching members 4 is continuously included. Each second roller 4 can rotate around the corresponding second roller axis R2. It should be understood that the considerations regarding the number and distribution of the first rollers 3 apply to the second rollers 4 with necessary changes.

[0037] The first roller 3 and the second roller 4 are designed, constructed and / or arranged to press or sew the apex strip 91 to the bead 90 in different ways. In other words, the first roller 3 has a different purpose or function from the second roller 4.

[0038] In this exemplary embodiment, the first roller 3 and the second roller 4 have different shapes. Figure 2 As best shown, each first roller 3 comprises a roller body 30 defining a blunt circumferential surface or pressing surface 31. Preferably, the blunt pressing surface 31 transitions to a dome-shaped and / or conical distal end 32. Figure 3 As shown, each second roller 4 comprises a roller body 40 defining a sharp circumferential surface or pressing surface 41. In particular, the pressing surface 41 has a steep or sharp transition to a surface defining a distal end 42 of the corresponding second roller 4. In other words, the roller body 30 of the first roller 3 has a pressing surface 31 facing the apex strip 91, which has a rounded or "soft" profile, while the roller body 40 of the second roller 4 has a pressing surface 41 facing the apex strip 91, which has a relatively sharp, definite pressing edge.

[0039] It is also conceivable that the first roller 3 and the second roller 4 may have the same shape with two sides for different purposes. For example, the rollers 3, 4 may be given the same shape with a blunt side and a sharp side, so that simply reversing the orientation of the rollers 3, 4 relative to the apex 91 will change the way the rollers 3, 4 press the apex 91. In this case, the side of the rollers 3, 4 facing the apex 91 is considered the "selected side", and the explanation of the "shape" of the rollers 3, 4 applies only to the "selected side".

[0040] The first roller 3 is maintained in an orientation in which the corresponding first roller axis R1 is perpendicular or substantially perpendicular to the central axis S, i.e., within a first orientation range H1 of 70 to 110 degrees to the central axis S. The second roller 4 is maintained in a different orientation in which the corresponding second roller axis R2 is parallel or nearly parallel to the central axis S. Alternatively, the second roller axis R2 may be positioned at a more oblique or inclined angle to the central axis S. In any case, the second roller axis R2 extends within a second orientation range H2 of 0 to 60 degrees to the central axis S. The orientation difference between the roller axes R1, R2 helps the first roller 3 and the second roller 4 to perform different suturing purposes.

[0041] In particular, the first roller 3 can roll in the circumferential direction C along a radial or substantially radial plane relative to the center axis S, and apply pressure to the apex 91 in a direction parallel to the center axis S. Therefore, the first roller can smooth out irregularities in the apex 91 to provide a smoother and / or more uniform bead-apex 9. In contrast, the second roller 4 can roll in the circumferential direction C along a cylindrical plane around the center axis S, and apply pressure to the apex 91 in a direction mainly directed radially inward, i.e., toward the center axis S. Therefore, the second roller 4 can firmly press the base 92 of the apex 91 onto the bead 90.

[0042] like Figure 6 As shown, each first roller 3 of the first group can be moved, driven, actuated and / or positioned by a corresponding first actuator 5 in a radial direction R perpendicular to the central axis S with at least one vector component. Alternatively, each first roller 3 can be driven in a direction parallel to the central axis S. Similarly, each second roller 4 of the second group can be moved, driven, actuated and / or positioned by a corresponding second actuator 6 in a radial direction R with at least one vector component. The second actuator 6 can be positioned to be at an inclined angle with the central axis S, so that the corresponding second roller 4 moves at the inclined angle, that is, moves within a range of 10 to 80 degrees with the central axis S. Preferably, the first rollers 3 of the first group are all moved to the same extent by a single actuator at the same time, that is, they move synchronously. Similarly, the second rollers 4 of the second group are all moved to the same extent at the same time. The diameter adjustment of the first group and the second group can be controlled independently, that is, the first roller 3 can be controlled to move to a slightly different diameter from the second roller 4, so as to be pressed onto the apex strip 91 with a slightly different radius. Thus, the radial position of the rollers 3, 4 can be adjusted to match the various diameters D1, D2 of the bead 90, the apex 91 or the bead-apex 9. The actuators 4, 5 can be linear drives, such as pneumatic cylinders or linear servomotors. However, many conceivable alternative drive systems are proposed, which will still be included within the scope of the present invention. For example, one or both groups of rollers 3, 4 can alternatively be driven in the radial direction R by a single actuator, i.e. a screw drive known per se.

[0043] The same actuators 5, 6 can also be used to actively control the pressure applied by the rollers 3, 4 to the apex 91. The pressure can be controlled individually for each roller 3, 4 or all rollers 3, 4 of a group can be controlled synchronously. Individual control can allow the profile of the apex 91 to be accurately followed by the individual rollers 3, 4. Alternatively, the rollers 3, 4 can be passively biased, spring-loaded or spring-biased, i.e., by providing the bead-apex stitching device 2 with one or more biasing members (not shown), such as springs.

[0044] like Figure 1 As shown, the bead-apex station 1 is configured to generate relative rotation between the first roller 3 of the first group and the bead-apex 9 around the central axis S in the circumferential direction C. This can be achieved in various ways. In this exemplary embodiment, the first group of rollers 3 as a whole can rotate around the central axis S, while the bead holder 10 remains stationary. The bead-apex stitching device 2 can include: a stitching base or stitching frame 21, which is used to support or hold the first roller 3 in a fixed relationship with each other; and a stitching drive 22, which is engaged with the stitching frame 21 to rotate the stitching frame 21 in the circumferential direction C.

[0045] Alternatively, one or more bead holders 10 may rotate relative to the first set of rollers 3, or one or more bead holders 10 and the first set of rollers 3 may both rotate simultaneously in opposite directions. The bead-apex station 1 may be provided with a bead holder base or bead holder frame 11 to support or hold one or more bead holders 10 and a bead holder driver 12 to rotate the bead holder frame 11 in the circumferential direction C.

[0046] Preferably, the second group rotates with the first group. In other words, the first group and the second group rotate in unison. Therefore, during rotation about the central axis S, the relative positions of the first roller 3 and the second roller 4 in the circumferential direction C can remain unchanged.

[0047] The bead-apex station 1 may optionally include a third or more sets of stitching members (not shown) to perform other functions. The third set of stitching members may be positioned, for example, to press or stitch the transition area between the bead 90 and the apex 91, i.e., the area at the base 92 of the apex 91 and the immediate adjacent area of ​​the bead 90.

[0048] The bead-apex strip station 1 or the bead-apex strip sewing device 2 is also provided with a control unit 8, which is electronically or operably connected to the bead retainer driver 12, the sewing driver 22, one or more first actuators 5 and / or one or more second actuators 6 to control various operations of the bead-apex strip station 1 and / or the bead-apex strip sewing device 2.

[0049] In this exemplary embodiment, the control unit 8 is programmed, loaded with instructions, adapted, arranged or configured to control the stitching drive 22 to rotate the first group in a first rotation direction M, and then rotate the first group in a second rotation direction N opposite to the first rotation direction M. In this example, the first group is preferably rotated in a first rotation range A of less than one turn, i.e., less than 360 degrees, and in a second rotation range B of less than one turn, i.e., less than 360 degrees. However, the first group may also rotate one or more turns in the opposite direction. Preferably, the second group rotates together or in unison with the first group. As previously described, the control unit 8 may alternatively be configured to rotate the bead holder 10 relative to the first group by controlling the bead holder drive 12.

[0050] During the rotation in the first rotation direction M, the first rollers 3 of the first group are controlled to press or sew the apex strip 91 to the bead 90. During this sew phase, the second rollers 4 of the second group can be retracted in the retraction direction L, such as Figure 7 As shown, the first rollers 3 of the first group are not disturbed. During or shortly before the reverse rotation in the second rotation direction N, the second rollers 4 of the second group come into contact with the apex strip 91, and the first rollers 3 of the first group can be retracted in the retraction direction L to allow the subsequent stitching stage. Therefore, the stitching process can be divided into two different stages.

[0051] The retraction direction L of the first roller 3 and the second roller 4 is shown to be parallel or substantially parallel to the center axis S. Alternatively, the retraction direction L may be in the working direction of the respective actuator 5, 6, i.e. at an oblique angle to the center axis S or at right angles to the center axis S. Thus, the actuator 5, 6 may be used to retract the respective roller 3, 4. This may eliminate the need for a separate retraction drive.

[0052] By rotating the rollers 3, 4 in the groups back and forth in opposite directions of rotation M, N, the first group can be returned to its initial position and immediately ready for the subsequent stitching operation. Thus, the cycle time of the bead-apex stitching device 2 can be significantly reduced. In addition, entanglement of control lines such as electrical cables and pneumatic tubes can be prevented.

[0053] However, if the combined stroke of the first and second groups is small enough, ie if each group has a sufficient number of rollers to reduce the angular spacing X, it is also possible to perform both stitching phases in the same rotational direction, ie following each other without reversing the rotational direction.

[0054] Figure 4 and 5The control schemes in which the first group rotates in the first rotation direction M and the second group rotates in the second rotation direction N are shown respectively. The horizontal axis represents the angular position of the first group and the second group along the first rotation range A and the second rotation range B, respectively. The vertical axis represents one or more parameters of the first group and the second group, namely the angular velocity V of the corresponding group in the axial direction C, or the pressure P applied to the apex strip 91 by the corresponding group. In this exemplary embodiment, the rotation range A, B is greater than one times the angular interval X between each first roller 3. Preferably, the rotation range A, B is less than twice the angular interval X. Alternatively, the rotation range A, B can be greater than twice the angular interval X to ensure that each area of ​​the apex strip 91 is pressed by at least two rollers of the corresponding group. The exceeded range can be used to start and slow down the group. In particular, the ranges A, B each include a plurality of sub-ranges, more specifically, the starting sub-range A1, B1, the middle sub-range A2, B2 and the ending sub-range A3, B3. The control unit 8 is configured to keep one or more parameters P, V constant or substantially constant in the intermediate subrange A2 and to increase and decrease one or more parameters P, V in the starting subrange A1 and the ending subrange A3 , respectively.

[0055] As previously mentioned, the same control scheme may be used to control the rotation of the bead holder 10 instead of or in addition to the rotation of the roller sets 3, 4.

[0056] Figure 7 An alternative bead-apex station 101 is shown with an alternative bead-apex stitching device 102, which differs from the aforementioned bead-apex stitching device 2 in that each first roller 3 of the first group can be positioned at an inclined angle K about an inclined axis T perpendicular to the first roller axis R1 and / or parallel to the central axis S or can be inclined towards the inclined angle K to an inclined orientation in which the first roller axis R1 does not intersect the central axis S. In the inclined orientation, the rolling direction of the first roller 3 can be slightly misaligned with respect to the circumferential direction C, resulting in the first roller 3 applying a lateral force such as a friction force to the apex 91, which can effectively smooth out irregularities in the apex 91. The first rollers 3 can be actively tilted to the inclined orientation, or they can be mounted in the inclined orientation. The tilt angle K is preferably kept constant. Alternatively, it can be actively controlled and / or changed during stitching.

[0057] The following will refer to Figure 1 -8 briefly describes a method for sewing the apex strip 91 to the tire bead 90 using the aforementioned tire bead-apex strip station 1, 101 and / or the aforementioned tire bead-apex strip sewing device 2, 102.

[0058] like Figure 1 As shown, the method comprises the following steps:

[0059] a) firstly sew the apex strip 91 to the bead 90 using the first roller 3 of the first set; and

[0060] b) The apex strip 91 is then sewn to the bead 90 using a second set of second rollers 4 .

[0061] During the step, according to Figure 4 In the control scheme in the first group, the first group rotates around the central axis S in the first rotation direction M. During step b), the first group Figure 5 The control scheme in the embodiment rotates in the second rotation direction N. The second group rotates together with the first group. Figure 4 During the control scheme in , the first group is active, which causes the first roller 3 to be pressed onto the apex strip 91. Figure 5 During the control scheme in , the second group is active, which causes the second roller 4 to be pressed onto the apex strip 91. Figure 7 As shown, the inactive group can be retracted in the retraction direction L.

[0062] It should be noted that the stages of stitching may overlap partially, i.e. after one group may be in place, the other group is retracted in the retraction direction. The latter may save cycle time, and / or may be beneficial to have both groups of devices contact the apex strip 91 at least once during the cycle.

[0063] The bead-apex station 1 , 101 may comprise further drive means (not shown) for simultaneously retracting the set of rollers 3 , 4 in a direction parallel to the central axis S to allow removal of the bead 90 and / or the apex 91 .

[0064] As previously mentioned, the bead holder 10 may be rotated instead of, or in addition to, the first set. In this case, the method comprises the following steps:

[0065] a) firstly sewing the apex strip 91 to the bead 90 using the first set of first rollers 3 while rotating the bead holder 10 in the first rotational direction M; and

[0066] b) The apex strip 91 is then sewn to the bead 90 using a second set of second rollers 4 while the bead holder 10 is rotated in the second rotational direction N.

[0067] It should also be noted that the control unit 8 can control various operating parameters of the bead-apex station 1, 101 and / or the bead-apex stitching device 2, 102 based on the recipe, i.e. the material, compound or mixture used to generate the bead 90 and / or the bead 91, and / or based on the tire design, i.e. the structure, shape and / or size of the various tire components and their relative positions in the green tire to be formed.

[0068] It should be understood that the above description is included to illustrate the operation of the preferred embodiment and is not intended to limit the scope of the invention. Based on the above discussion, many variations will be apparent to those skilled in the art, and these variations will still be included within the scope of the invention.

[0069] Reference numerals list

[0070] 1. Bead-triangular rubber strip station

[0071] 10 Bead retainer

[0072] 11 Bead retainer frame

[0073] 12 Bead retainer driver

[0074] 2 Bead-triangular rubber strip sewing device

[0075] 21. Stitching Frame

[0076] 22 Suture Driver

[0077] 3. First suturing member

[0078] 30 Roller

[0079] 31 Press the surface

[0080] 32 Remote

[0081] 4 Second suture member

[0082] 40 Roller

[0083] 41 Press the surface

[0084] 42 Remote

[0085] 5. First Actuator

[0086] 6 Second actuator

[0087] 8 Control unit

[0088] 9 Bead-Triangular rubber strip

[0089] 90 bead

[0090] 91 triangle rubber strip

[0091] 92 base

[0092] 93 end

[0093] 101 Replacement tire bead-triangular rubber strip station

[0094] 102 Replacement tire bead-triangular rubber strip sewing device

[0095] AFirst rotation range

[0096] A1 Starting subrange

[0097] A2 Middle subrange

[0098] A3 End subrange

[0099] B Second rotation range

[0100] B1 Starting sub-range

[0101] B2 middle subrange

[0102] B3 End subrange

[0103] C Circumferential direction

[0104] D1 First diameter

[0105] D2 Second diameter

[0106] E Extension direction

[0107] H1 First directional range

[0108] H2 Second directional range

[0109] KTilt Angle

[0110] L Retraction direction

[0111] MFirst direction of rotation

[0112] N Second direction of rotation

[0113] P pressure

[0114] R radial direction

[0115] R1 first roller axis

[0116] R2 Second roller axis

[0117] S Center axis

[0118] T Tilt axis

[0119] V Angular velocity

[0120] X Angle Interval

Claims

1. A bead-to-bead suturing device for suturing an apex rubber strip to a bead, wherein: The bead-to-apex rubber sewing device includes: at least one first sewing member, which is used to sew the apex rubber to the bead; and at least one second sewing member, which is used to sew the apex rubber to the bead in a manner different from that of the first sewing member, wherein the at least one first sewing member and the at least one second sewing member can rotate together in a circumferential direction around a central axis, wherein the bead-to-apex rubber sewing device includes: a sewing drive, which is used to drive the at least one first sewing member and the at least one second sewing member to rotate around the central axis; and a control unit operatively connected to the sewing drive, wherein the control unit is configured to control the sewing drive to rotate the at least one first sewing member and the at least one second sewing member in a first rotational direction beyond a first rotational range, and then rotate the at least one first sewing member and the at least one second sewing member in a second rotational direction opposite to the first rotational direction beyond a second rotational range.

2. The bead-triangular rubber strip sewing device according to claim 1, characterized in that: The first rotation range is less than one circle.

3. The bead-triangular rubber strip sewing device according to claim 1 or 2, characterized in that: The second rotation range is less than one circle.

4. A bead-triangular rubber strip station, comprising a bead-triangular rubber strip sewing device for sewing the apex rubber strip to the bead, wherein: The bead-to-apex rubber stitching device includes: at least one first stitching member for stitching the apex rubber to the bead and at least one second stitching member for stitching the apex rubber to the bead in a manner different from the first stitching member; and a bead retainer for concentrically retaining the bead to the bead-to-apex rubber stitching device, wherein the bead retainer is rotatable in a circumferential direction around a center axis, wherein the bead-to-apex rubber station includes a bead retainer driver for driving the bead retainer to rotate and a control unit operatively connected to the bead retainer driver, wherein the control unit is configured to control the bead retainer driver to rotate the bead retainer in a first rotational direction beyond a first rotational range, and then rotate the bead retainer in a second rotational direction opposite to the first rotational direction beyond a second rotational range.

5. The bead-apex rubber station according to claim 4, characterized in that: The first rotation range is less than one circle.

6. The bead-apex rubber station according to claim 4 or 5, characterized in that: The second rotation range is less than one circle.

7. A method for sewing an apex strip to a tire bead using the tire bead-apex strip sewing device according to claim 1, wherein: The method comprises the following steps: a) first sewing the apex to the tire bead using the at least one first sewing member by rotating the at least one first sewing member and the at least one second sewing member in the first rotational direction over the first rotational range; and b) subsequently sewing the apex to the bead using the at least one second sewing member by rotating the at least one first sewing member and the at least one second sewing member in the second rotational direction over the second rotational range.

8. The method according to claim 7, characterized in that The first rotation range is less than one circle.

9. The method according to claim 7 or 8, characterized in that: The second rotation range is less than one circle.

10. A method for sewing an apex bead to a bead using the bead-apex bead station according to claim 4, wherein: The method comprises the following steps: a) first sewing the apex to the bead using the at least one first sewing member while rotating the bead retainer in the first rotational direction over the first rotational range; and b) subsequently sewing the apex to the bead using the at least one second sewing member while rotating the bead retainer over the second rotational range in a second rotational direction opposite to the first rotational direction.

11. The method according to claim 10, characterized in that The first rotation range is less than one circle.

12. The method according to claim 10, characterized in that In another embodiment, the second rotation range is less than one turn.

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