CN216267740U - Chuck structure and forming drum - Google Patents

Abstract

The utility model provides a chuck structure and a forming drum, wherein the chuck structure is used for positioning a tire body cylinder on the forming drum, the chuck structure comprises an installation sleeve and a chuck assembly, the chuck assembly is arranged on the installation sleeve in an expandable and contractible manner, the chuck assembly is provided with an avoiding position and a positioning position, so that the tire body cylinder can pass through the chuck assembly when the chuck assembly is contracted to the avoiding position, and the tire body cylinder is fixed on the forming drum when the chuck assembly is expanded to the positioning position. The chuck structure solves the problem of low matching efficiency of the forming drum and the tire body cylinder in the prior art.

Description

Chuck structure and forming drum

Technical Field

The utility model relates to the technical field of tire manufacturing, in particular to a chuck structure and a forming drum.

Background

At present, the engineering tire and the giant tire are generally produced by adopting a twice-method forming process, a two-section forming drum and a winding drum of the twice-method forming process usually adopt a fixed chuck structure, when a tire body cylinder is transferred or the tire is unloaded, the outer diameter of the fixed chuck is larger than the inner diameter of a tire bead, so that when the tire body cylinder is transferred into the forming drum and the winding drum or the formed tire is unloaded, the chuck at the outer side of the drum needs to be manually disassembled and then assembled; the chuck is heavier, the chuck of the giant tire is about 300Kg, manual disassembly is very inconvenient, the chuck needs about 40 minutes every time of disassembly and assembly, the transmission efficiency of the tire body cylinder is seriously influenced, and certain influence is generated on the quality of the tire.

SUMMERY OF THE UTILITY MODEL

The utility model mainly aims to provide a chuck structure and a forming drum, and aims to solve the problem of low matching efficiency of the forming drum and a tire body cylinder in the prior art.

In order to achieve the above object, according to one aspect of the present invention, a chuck structure for positioning a carcass tube on a building drum is provided, the chuck structure comprising a mounting sleeve and a chuck assembly, the chuck assembly being telescopically arranged on the mounting sleeve, wherein the chuck assembly has an avoiding position and a positioning position for enabling the carcass tube to pass through the chuck assembly when the chuck assembly is retracted to the avoiding position and for securing the carcass tube on the building drum when the chuck assembly is expanded to the positioning position.

Further, the chuck assembly includes: the first slips are arranged around the installation sleeve at intervals, and each first slip is telescopically arranged along the radial direction of the installation sleeve; the second slips are arranged around the installation sleeve at intervals, and each second slip is telescopically arranged along the radial direction of the installation sleeve; wherein, a plurality of first slips and a plurality of second slips are in turn arranged alternately.

Further, the chuck assembly further comprises: a drive mechanism; the first connecting rods are respectively connected with the driving mechanism, and the first connecting rods and the first slips are arranged in a one-to-one correspondence manner, wherein the driving mechanism drives the first slips to move through the first connecting rods; the plurality of second connecting rods are respectively connected with the driving mechanism, the plurality of second connecting rods and the plurality of second slips are arranged in a one-to-one correspondence mode, and the driving mechanism drives the second slips to move through the second connecting rods.

Further, the drive mechanism includes: the driving cylinder is arranged on the mounting sleeve; the rotating disc is rotatably sleeved on the mounting sleeve, and each first connecting rod and each second connecting rod are respectively and rotatably connected with the rotating disc; wherein, drive actuating cylinder and carousel articulated connection to rotate through the drive carousel and drive each first connecting rod and the motion of second connecting rod.

Furthermore, the turntable is of a circular ring structure, and an included angle between the first connecting rod and the outer edge of the turntable is smaller than an included angle between the second connecting rod and the outer edge of the turntable.

Furthermore, a plurality of first connecting plates and a plurality of second connecting plates are arranged on the rotary table, wherein each first connecting plate is hinged to each first connecting rod in a one-to-one correspondence mode, each second connecting plate is hinged to each second connecting rod in a one-to-one correspondence mode, and the distance from the hinged position of the first connecting plate and the first connecting rod to the circle center of the rotary table is larger than the distance from the hinged position of the second connecting plate and the second connecting rod to the circle center of the rotary table.

Further, first slips is fan-shaped structure, and the second slips is trapezium structure, and when chuck assembly was in dodge position or position, a plurality of first slips and a plurality of second slips mutually cooperated in order to form ring structure.

Further, the chuck assembly further comprises: the mounting plate is arranged around the outer side of the mounting sleeve; and the plurality of tracks are arranged around the mounting plate, wherein the tracks extend along the radial direction of the mounting sleeve, and each first slip and each second slip are movably arranged on the corresponding track respectively.

Further, the building drum further comprises: the annular capsule, the annular capsule is connected with the chuck subassembly to when the chuck subassembly is in the locating position, the cladding is at the part that the chuck subassembly inserted the matrix section of thick bamboo, and/or a plurality of sealed pad, each sealed pad sets up respectively between adjacent first slips and second slips, with when the chuck subassembly is in the locating position, seals up the gap between first slips and the second slips.

According to another aspect of the utility model, a building drum is provided comprising two chuck structures arranged in a spaced apart relationship with respect to each other and defining a positioning space therebetween for securing a carcass tube in the positioning space, wherein the chuck structures are as described above.

The chuck structure applying the technical proposal of the utility model is mainly applied to a forming drum or a winding drum for manufacturing a tire and used for positioning a tire body cylinder, the mounting sleeve of the chuck structure adopts a circular sleeve structure and is fixed along the horizontal direction, the chuck assembly is arranged on the mounting sleeve in a surrounding way, when the tire body cylinder is transferred onto the forming drum, the chuck assembly firstly contracts to an avoiding position along the radial direction of the mounting sleeve, at the moment, the radius of the chuck assembly in the radial direction is smaller than the radius of the inner side of the tire body cylinder, so that the tire body cylinder can pass through the chuck assembly along the mounting sleeve and enter between two chuck structures, after the tire body cylinder enters between the two chuck structures, the chuck structures extend to the positioning position along the radial direction of the mounting sleeve, at the moment, the radius of the chuck structure in the radial direction is larger than the radius of the inner side of the tire body cylinder, the chuck structures play a role in limiting and prevent the tire body cylinder from moving left and right, according to the utility model, the chuck with the expansion structure is arranged, so that the tire body cylinder can be smoothly installed, positioned and disassembled, the problem of disassembling and assembling the chuck structure is avoided, the time is saved, and the efficiency is improved.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate embodiments of the utility model and, together with the description, serve to explain the utility model and not to limit the utility model. In the drawings:

fig. 1 shows a schematic view of a carcass sleeve fitted into a building drum in an embodiment of the building drum according to the utility model;

FIG. 2 shows a schematic view of an embodiment of the chuck construction of the present invention in an escape position;

fig. 3 shows a schematic view of the carcass sleeve in an embodiment of the building drum of the utility model in inflated position;

FIG. 4 shows a schematic view of a chuck construction embodiment of the present invention employing a ring capsule in a positioning position;

FIG. 5 is a schematic view of an embodiment of a cartridge structure employing a gasket according to the present invention in a seated position;

figure 6 shows a cross-sectional view of the building drum of figure 1.

Wherein the figures include the following reference numerals:

10. installing a sleeve; 20. a carcass tube; 30. a chuck assembly; 31. a first slip; 32. a second slip; 41. a first link; 42. a second link; 43. a driving cylinder; 44. a turntable; 441. a first connecting plate; 442. a second connecting plate; 51. mounting a plate; 52. a track; 60. an annular capsule; 70. and a gasket.

Detailed Description

It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The present invention will be described in detail below with reference to the embodiments with reference to the attached drawings.

In order to solve the problem of low matching efficiency of the forming drum and the tire body cylinder 20 in the prior art, the utility model provides a chuck structure and a forming drum.

Referring to fig. 1 to 6, the present invention provides a chuck structure for positioning a carcass tube 20 on a building drum, the chuck structure comprising a mounting sleeve 10 and a chuck assembly 30, the chuck assembly 30 being telescopically arranged on the mounting sleeve 10, wherein the chuck assembly 30 has an escape position and a positioning position for allowing the carcass tube 20 to pass through the chuck assembly 30 when the chuck assembly 30 is retracted to the escape position and for securing the carcass tube 20 on the building drum when the chuck assembly 30 is expanded to the positioning position.

The chuck structure of the utility model is mainly applied to a forming drum or a winding drum for manufacturing a tire, and is used for positioning a tire body cylinder 20, a mounting sleeve 10 of the chuck structure adopts a circular sleeve structure and is fixed along the horizontal direction, a chuck assembly 30 is arranged on the mounting sleeve 10 in a surrounding way, when the tire body cylinder 20 is transferred onto the forming drum, the chuck assembly 30 firstly contracts to an avoiding position along the radial direction of the mounting sleeve 10, at the moment, the radius of the chuck assembly 30 in the radial direction is smaller than that of the inner side of the tire body cylinder 20, so that the tire body cylinder 20 can pass through the chuck assembly 30 along the mounting sleeve 10 and enter between two chuck structures, after the tire body cylinder 20 enters between the two chuck structures, the chuck structures extend to the positioning position along the radial direction of the mounting sleeve 10, at the moment, the radius of the chuck structures in the radial direction is larger than that of the inner side of the tire body cylinder 20, and play a role in limiting to the tire body cylinder 20, the utility model prevents the tire from moving left and right, and the tire body cylinder 20 can be smoothly installed, positioned and disassembled by arranging the chuck with the expansion structure, thereby avoiding the problem of disassembling and assembling the chuck structure, saving time and improving efficiency.

The spider assembly 30 comprises a plurality of first slips 31 and a plurality of second slips 32, the plurality of first slips 31 being arranged at intervals around the installation sleeve 10, and each first slip 31 being telescopically arranged in a radial direction of the installation sleeve 10; a plurality of second slips 32 are arranged around the installation sleeve 10 at intervals, and each second slip 32 is telescopically arranged along the radial direction of the installation sleeve 10; wherein the plurality of first slips 31 and the plurality of second slips 32 are alternately arranged in sequence. The rotating disc 44 is provided with a plurality of first connecting plates 441 and a plurality of second connecting plates 442, wherein each first connecting plate 441 is hinged to each first connecting rod 41 in a one-to-one correspondence manner, each second connecting plate 442 is hinged to each second connecting rod 42 in a one-to-one correspondence manner, and the distance from the hinged position of the first connecting plate 441 and the first connecting rod 41 to the center of the rotating disc 44 is greater than the distance from the hinged position of the second connecting plate 442 and the second connecting rod 42 to the center of the rotating disc 44. The rotating disc 44 is provided with a plurality of first connecting plates 441 and a plurality of second connecting plates 442, wherein each first connecting plate 441 is hinged to each first connecting rod 41 in a one-to-one correspondence manner, each second connecting plate 442 is hinged to each second connecting rod 42 in a one-to-one correspondence manner, and the distance from the hinged position of the first connecting plate 441 and the first connecting rod 41 to the center of the rotating disc 44 is greater than the distance from the hinged position of the second connecting plate 442 and the second connecting rod 42 to the center of the rotating disc 44. The turntable 44 is a circular ring structure, and the included angle between the first connecting rod 41 and the outer edge of the turntable 44 is smaller than the included angle between the second connecting rod 42 and the outer edge of the turntable 44.

The spider assembly 30 in this embodiment is a circular ring structure formed by a plurality of first slips 31 and a plurality of second slips 32 alternately, and in order to facilitate contraction and expansion, the present invention provides two embodiments as follows:

according to an embodiment of the present invention, the control system sets the moving time of the first slip 31 and the second slip 32 to be different, and specifically, the second slip 32 may be moved before the first slip 31 when the slip contracts or expands, so that the slip can be structurally avoided.

According to another embodiment of the present invention, the first slip 31 and the second slip 32 can be moved simultaneously, but the second slip 32 can move faster than the first slip 31, so as to ensure the telescopic movement of the circular ring, and specifically, the included angle between the first connecting rod 41 and the outer edge of the rotating disc 44 is smaller than the included angle between the second connecting rod 42 and the outer edge of the rotating disc 44, so that the moving speed of the connecting rod in the radial direction is slower as the included angle is smaller when the rotating disc 44 rotates, so that the moving speed of the first slip 31 and the second slip 32 is different, and meanwhile, the length of the first connecting rod 41 is longer than that of the second connecting rod 42, the distance between the hinge position of the first connecting rod 41 and the rotating disc 44 and the hinge position of the second connecting rod 42 and the rotating disc 44 in the radial direction of the rotating disc 44 are different, and for this purpose, a first connecting plate 441 and a second connecting plate 442 are provided, and the first connecting plate 441 and the second connecting plate 442 are fixed on the rotating disc 44, the first connecting plate 441 and the second connecting plate 442 are provided with hinge holes to be connected to the first link 41 and the second link 42, respectively, and the length of the first connecting plate 441 is greater than that of the second connecting plate 442.

The first slips 31 are of a fan-shaped structure, the second slips 32 are of a trapezoid structure, and when the chuck assembly 30 is located at an avoiding position or a locating position, the first slips 31 and the second slips 32 are matched with each other to form a circular ring-shaped structure.

In order to form a circular ring structure and facilitate contraction and expansion, the first slip 31 is arranged in a fan-shaped structure, the second slip 32 is arranged in a trapezoid structure, but the upper edge and the lower edge of the second slip 32 are arc-shaped, so that the first slip 31 and the second slip 32 are combined to form a circular ring,

the chuck assembly 30 further comprises a driving mechanism, a plurality of first connecting rods 41 and a plurality of second connecting rods 42, wherein the plurality of first connecting rods 41 are respectively connected with the driving mechanism, the plurality of first connecting rods 41 and the plurality of first slips 31 are arranged in a one-to-one correspondence manner, and the driving mechanism drives the first slips 31 to move through the first connecting rods 41; the plurality of second connecting rods 42 are respectively connected with a driving mechanism, and the plurality of second connecting rods 42 are arranged in one-to-one correspondence with the plurality of second slips 32, wherein the driving mechanism drives the second slips 32 to move through the second connecting rods 42. The drive mechanism includes: a driving cylinder 43 and a turntable 44, wherein the driving cylinder 43 is arranged on the mounting sleeve 10; the rotary table 44 is rotatably sleeved on the mounting sleeve 10, and each first connecting rod 41 and each second connecting rod 42 are respectively and rotatably connected with the rotary table 44; wherein, the driving cylinder 43 is hinged with the rotary disc 44 to drive the first connecting rod 41 and the second connecting rod 42 to move through the rotation of the driving rotary disc 44.

In this embodiment, two sets of driving cylinders 43 are adopted to drive the rotation of the turntable 44 together, the driving cylinders 43 are arranged on the mounting plate 51, the driving cylinders 43 are in driving connection with the turntable 44, so as to drive the turntable 44 to rotate in a reciprocating manner, and the whole movement steps are as follows: the driving cylinder 43 drives the rotating disc 44 to rotate, and the first connecting plate 441 and the second connecting plate 442 on the rotating disc 44 drive the first connecting rod 41 and the second connecting rod 42 to move, so that the first slip 31 and the second slip 32 do radial contraction and expansion movement.

The chuck assembly 30 further comprises a mounting plate 51 and a plurality of rails 52, the mounting plate 51 being disposed around the outside of the mounting sleeve 10; a plurality of rails 52 are disposed around the mounting plate 51, wherein the rails 52 are disposed to extend in a radial direction of the mounting sleeve 10, and each of the first and second slips 31 and 32 is movably disposed on the corresponding rail 52.

The mounting plate 51 is an annular plate and is sleeved outside the mounting sleeve 10, and the first slip 31 and the second slip 32 radially move along the track 52 on the mounting plate 51, so that the moving accuracy of each of the first slip 31 and the second slip 32 is ensured.

According to an embodiment, as shown in fig. 4, when pressing the inside of the carcass drum, to ensure the closure between the carcass drum and the building drum, the building drum further comprises a ring-shaped bladder 60, the ring-shaped bladder 60 being connected to the chuck assembly 30 so as to cover the portion of the chuck assembly 30 inserted into the carcass tube 20 when the chuck assembly 30 is in the positioning position. Before the inner side of the carcass drum is pressurized, the annular capsule 60 is pressurized, so that the part of the chuck assembly 30 inserted into the carcass drum is covered after the capsule is expanded, and the problem of air leakage caused by gaps on the chuck assembly 30 is solved.

In addition, as shown in fig. 5, the chuck assembly 30 may be sealed by providing a plurality of sealing pads 70, specifically, each sealing pad 70 is respectively disposed between the adjacent first slip 31 and the adjacent second slip 32 to seal the gap between the first slip 31 and the second slip 32 when the chuck assembly 30 is in the positioning position, when the chuck assembly is installed, the sealing pads 70 may be prefabricated on both sides of the first slip 31 or both sides of the second slip 32, and the sealing pads 70 are elastic rubber pads, so that the sealing performance is better.

The utility model also provides a forming drum, which comprises two chuck structures, wherein the two chuck structures are oppositely arranged at intervals and form a positioning space between the two chuck structures so as to fix the tire body cylinder 20 in the positioning space, and the chuck structures are the chuck structures.

The chuck structure of the present invention can be applied to different drums for positioning the carcass barrel 20 or the tire carcass, such as a shaping drum or a winding drum, and only one or both of the two chuck structures can adopt the chuck structure capable of expanding and contracting, and the specific arrangement is according to the requirements of the shaping drum.

From the above description, it can be seen that the above-described embodiments of the present invention achieve the following technical effects:

the chuck structure of the utility model is mainly applied to a forming drum or a winding drum for manufacturing a tire, and is used for positioning a tire body cylinder 20, a mounting sleeve 10 of the chuck structure adopts a circular sleeve structure and is fixed along the horizontal direction, a chuck assembly 30 is arranged on the mounting sleeve 10 in a surrounding way, when the tire body cylinder 20 is transferred onto the forming drum, the chuck assembly 30 firstly contracts to an avoiding position along the radial direction of the mounting sleeve 10, at the moment, the radius of the chuck assembly 30 in the radial direction is smaller than that of the inner side of the tire body cylinder 20, so that the tire body cylinder 20 can pass through the chuck assembly 30 along the mounting sleeve 10 and enter between two chuck structures, after the tire body cylinder 20 enters between the two chuck structures, the chuck structures extend to the positioning position along the radial direction of the mounting sleeve 10, at the moment, the radius of the chuck structures in the radial direction is larger than that of the inner side of the tire body cylinder 20, and play a role in limiting to the tire body cylinder 20, the utility model prevents the tire from moving left and right, and the tire body cylinder 20 can be smoothly installed, positioned and disassembled by arranging the chuck with the expansion structure, thereby avoiding the problem of disassembling and assembling the chuck structure, saving time and improving efficiency.

It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments according to the present application. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof, unless the context clearly indicates otherwise.

The relative arrangement of the components and steps, the numerical expressions and numerical values set forth in these embodiments do not limit the scope of the present invention unless specifically stated otherwise. Meanwhile, it should be understood that the sizes of the respective portions shown in the drawings are not drawn in an actual proportional relationship for the convenience of description. Techniques, methods, and apparatus known to those of ordinary skill in the relevant art may not be discussed in detail but are intended to be part of the specification where appropriate. In all examples shown and discussed herein, any particular value should be construed as merely illustrative, and not limiting. Thus, other examples of the exemplary embodiments may have different values. It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, further discussion thereof is not required in subsequent figures.

In the description of the present invention, it is to be understood that the orientation or positional relationship indicated by the orientation words such as "front, rear, upper, lower, left, right", "lateral, vertical, horizontal" and "top, bottom", etc. are usually based on the orientation or positional relationship shown in the drawings, and are only for convenience of description and simplicity of description, and in the case of not making a reverse description, these orientation words do not indicate and imply that the device or element being referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore, should not be considered as limiting the scope of the present invention; the terms "inner and outer" refer to the inner and outer relative to the profile of the respective component itself.

Spatially relative terms, such as "above … …," "above … …," "above … …," "above," and the like, may be used herein for ease of description to describe one device or feature's spatial relationship to another device or feature as illustrated in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if a device in the figures is turned over, devices described as "above" or "on" other devices or configurations would then be oriented "below" or "under" the other devices or configurations. Thus, the exemplary term "above … …" can include both an orientation of "above … …" and "below … …". The device may be otherwise variously oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.

It should be noted that the terms "first", "second", and the like are used to define the components, and are only used for convenience of distinguishing the corresponding components, and the terms have no special meanings unless otherwise stated, and therefore, the scope of the present invention should not be construed as being limited.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (10)

1. A chuck structure for positioning a carcass drum (20) on a building drum, characterized in that it comprises:

a mounting sleeve (10);

a chuck assembly (30), the chuck assembly (30) is arranged on the mounting sleeve (10) in an expandable and contractible manner, wherein the chuck assembly (30) is provided with an avoiding position and a positioning position, so that the carcass tube (20) can pass through the chuck assembly (30) when the chuck assembly (30) is contracted to the avoiding position, and the carcass tube (20) is fixed on the forming drum when the chuck assembly (30) is expanded to the positioning position.

2. The chuck arrangement according to claim 1, characterized in that the chuck assembly (30) comprises:

a plurality of first slips (31), wherein the first slips (31) are arranged around the installation sleeve (10) at intervals, and each first slip (31) is telescopically arranged along the radial direction of the installation sleeve (10);

a plurality of second slips (32), the plurality of second slips (32) being arranged at intervals around the installation sleeve (10), and each second slip (32) being telescopically arranged in a radial direction of the installation sleeve (10);

wherein a plurality of the first slips (31) and a plurality of the second slips (32) are alternately arranged in sequence.

3. The chuck arrangement according to claim 2, characterized in that the chuck assembly (30) further comprises:

a drive mechanism;

a plurality of first connecting rods (41), wherein the plurality of first connecting rods (41) are respectively connected with the driving mechanism, the plurality of first connecting rods (41) are arranged in one-to-one correspondence with the plurality of first slips (31), and the driving mechanism drives the first slips (31) to move through the first connecting rods (41);

the second connecting rods (42) are respectively connected with the driving mechanism, the second connecting rods (42) are arranged in one-to-one correspondence with the second slips (32), and the driving mechanism drives the second slips (32) to move through the second connecting rods (42).

4. The chuck construction according to claim 3, wherein the drive mechanism comprises:

a drive cylinder (43), the drive cylinder (43) being disposed on the mounting sleeve (10);

the rotary disc (44) is rotatably sleeved on the mounting sleeve (10), and each first connecting rod (41) and each second connecting rod (42) are respectively and rotatably connected with the rotary disc (44);

the driving air cylinder (43) is hinged to the rotary table (44) so as to drive the rotary table (44) to rotate to drive the first connecting rod (41) and the second connecting rod (42) to move.

5. The chuck structure according to claim 4, characterized in that the turntable (44) is a circular ring structure, and the angle between the first connecting rod (41) and the outer edge of the turntable (44) is smaller than the angle between the second connecting rod (42) and the outer edge of the turntable (44).

6. The chuck structure according to claim 4, characterized in that the rotating disk (44) is provided with a plurality of first connecting plates (441) and a plurality of second connecting plates (442), wherein each first connecting plate (441) is hinged with each first connecting rod (41) in a one-to-one correspondence, each second connecting plate (442) is hinged with each second connecting rod (42) in a one-to-one correspondence, and the distance from the hinged position of the first connecting plate (441) and the first connecting rod (41) to the center of the rotating disk (44) is greater than the distance from the hinged position of the second connecting plate (442) and the second connecting rod (42) to the center of the rotating disk (44).

7. The spider structure of claim 3, wherein the first slips (31) are of a fan configuration and the second slips (32) are of a ladder configuration, and wherein the first slips (31) and the second slips (32) cooperate to form a ring configuration when the spider assembly (30) is in the retracted position or the set position.

8. The chuck arrangement according to claim 2, characterized in that the chuck assembly (30) further comprises:

a mounting plate (51), the mounting plate (51) being disposed around an outside of the mounting sleeve (10);

a plurality of rails (52), a plurality of the rails (52) are arranged around the mounting plate (51), wherein the rails (52) extend along the radial direction of the mounting sleeve (10), and each of the first slip (31) and the second slip (32) is movably arranged on the corresponding rail (52).

9. The chuck construction as set forth in claim 2, wherein the building drum further comprises:

a toroidal capsule (60), said toroidal capsule (60) being associated with the chuck assembly (30) so as to cover the portion of the chuck assembly (30) inserted into the carcass drum (20) and/or so as to cover the same when the chuck assembly (30) is in the positioning position

A plurality of gaskets (70), each gasket (70) disposed between adjacent first and second slips (31, 32) to seal a gap between the first and second slips (31, 32) when the spider assembly (30) is in the set position.

10. Building drum, comprising two chuck structures, which are arranged at a distance from each other and form a positioning space between them, for fixing a carcass tube (20) in said positioning space, wherein said chuck structures are as claimed in any one of claims 1 to 9.

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