CN211710086U

CN211710086U - Tire building drum

Info

Publication number: CN211710086U
Application number: CN201922404630.6U
Authority: CN
Inventors: 李国松; 李彦海
Original assignee: Suzhou Sachi Huachen Machinery Co Ltd
Current assignee: Safe Run Intelligent Equipment Co Ltd
Priority date: 2019-12-27
Filing date: 2019-12-27
Publication date: 2020-10-20
Anticipated expiration: 2029-12-27

Abstract

The utility model relates to a tire shaping technical field discloses a tire building drum. The tire building drum includes that drum shaft and cover locate epaxial well drum of drum and two side drums, well drum is located between two side drums, well drum includes the tile subassembly, expansion assembly and resets the piece, expansion assembly is connected and can axial displacement together with the side drum, expansion assembly can radially expand in order to drive the radial expansion of tile subassembly, it can radially contract in order to drive the radial shrink of tile subassembly to reset the piece, when the tile subassembly is in the contraction state, the periphery wall of tile subassembly can form continuous face of cylinder. The utility model provides a tire building drum, when carrying out the laminating operation, the periphery wall meshing of tile subassembly forms continuous face of cylinder, can not appear because the clearance leads to sewing up the not good situation of quality, has improved the production quality of child embryo.

Description

Tire building drum

Technical Field

The utility model relates to a tire shaping technical field especially relates to a tire building drum.

Background

In the prior art, a tyre building drum comprises a drum shaft, two side drums and a middle drum located between the two side drums, the middle drum comprising two half drums which are axially movable relative to each other, each half drum comprising a finger, the fingers of the two half drums being axially engageable.

In the tire forming process, the tire forming drum needs to be converted from a flat drum material sticking state (flat width state) to an inflation shaping state (shaping width state), so that the distance between the shoulders of the two half drums of the middle drum in the flat width state is larger than that of the two half drums of the middle drum in the shaping width state. However, in the flat-drum state (flat-width state) of the tire building drum, the finger structures of the two half drums are not completely engaged to the bottom, and therefore, a gap exists in the middle drum of the tire building drum in the axial direction. When the flat drum is used for pasting materials, after the belt-shaped materials are wound into the forming drum for one circle, the head and the tail of the belt-shaped materials need to be pressed and sewed through a stitching device. If the stitching device moves to the gap, poor stitching quality of the head end and the tail end of the strip-shaped material can be caused, or the strip-shaped material is separated from the gap or even deformed, so that air bubbles are easily formed during subsequent tire vulcanization, and the tire blank quality is unqualified.

SUMMERY OF THE UTILITY MODEL

Based on the above problem, an object of the utility model is to provide a tire building drum, when carrying out the operation of subsides material, do not have the clearance, improved the quality of sewing up of taking material head and the tail both ends.

In order to achieve the purpose, the utility model adopts the following technical proposal:

the utility model provides a tire building drum, includes the drum shaft and the cover is located epaxial well drum of drum and two side drums, well drum is located two between the side drum, well drum includes tile subassembly, expansion subassembly and resets the piece, the expansion subassembly with the side drum is connected and can axial displacement together, the expansion subassembly can radially expand in order to drive the tile subassembly is followed the radial expansion of drum shaft, it can radially contract in order to drive to reset the piece the radial shrink of tile subassembly, works as when the tile subassembly is in the contraction state, the periphery wall of tile subassembly can form continuous face of cylinder.

As a preferred aspect of the tire building drum of the present invention, the drum tile assembly includes:

the bracket is sleeved and connected on the drum shaft;

the plurality of drum tile units are distributed along the circumferential direction of the support and comprise drum tiles, the drum tiles are connected to the support in a sliding mode, and the plurality of drum tiles can be sequentially meshed end to end along the circumferential direction of the support to form a continuous cylindrical surface.

As the utility model discloses a preferred scheme of tire building drum, the tile unit still includes support piece, support piece's one end is followed the radial slip of support set up in on the support, the other end with the tile is connected.

As the utility model discloses a preferred scheme of tire building drum, the radial outside surface of tile is concave to be equipped with the holding tank, and is a plurality of the tile the holding tank makes up into approximate continuous circular recess, reset the piece set up in the circular recess.

As the utility model discloses a preferred scheme of tire building drum, the tile unit still includes the guide pin bushing, the guide pin bushing connect in on the support, support piece sliding connection in the guide pin bushing.

As the utility model discloses a preferred scheme of tire building drum, the last guide way that is provided with of support piece, the guide way is followed support piece's slip direction extends, be provided with circumference locating part on the guide pin bushing, the tip sliding connection of circumference locating part in the guide way.

As the utility model discloses a preferred scheme of tire building drum, the both sides of drum tile are provided with a plurality of meshing teeth, adjacent two the meshing groove, one are formed between the meshing tooth the drum tile meshing tooth can stretch into another the drum tile the meshing inslot.

As a preferred aspect of the tire building drum of the present invention, when the expansion member moves axially, a part of the expansion member can be contracted to the radial inner side of the drum tile member.

As the utility model discloses a preferred scheme of tire building drum, the expansion subassembly with linking department of tile is provided with first inclined plane, be provided with on the tile can with first inclined plane complex second inclined plane.

As the utility model discloses a preferred scheme of tire building drum, the support is formed by two semi-ring structure concatenations.

The utility model has the advantages that:

the utility model provides a tire building drum, tire building drum includes that drum shaft and cover locate the epaxial well drum of drum and two side drums, well drum includes the tile subassembly, the expansion subassembly and the piece that resets, the expansion subassembly can be with the radial expansion of tile subassembly along the drum shaft, the piece that resets can reset the tile subassembly to the contraction state, when the tile subassembly is in the contraction state, the periphery wall of tile subassembly can mesh and form continuous face of cylinder, thereby when carrying out the laminating operation, banded material wraps up in above-mentioned a week face of cylinder, then press through stitching up the ware with the head and the tail of banded material and sew up, can not appear because the clearance leads to stitching up the not good situation of quality, the quality of sewing up at belted material head and the tail both ends has been improved, the production quality of child embryo has been improved.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required to be used in the description of the embodiments of the present invention will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the contents of the embodiments of the present invention and the drawings without creative efforts.

FIG. 1 is a schematic structural view of a tire building drum according to an embodiment of the present invention in a contracted state;

FIG. 2 is a schematic structural view of a tire building drum according to an embodiment of the present invention as it expands;

FIG. 3 is a schematic view of a tire building drum according to an embodiment of the present invention showing a partial configuration of the drum assembly as the drum tile assembly expands and the expansion assembly contracts;

FIG. 4 is a schematic structural view of a drum assembly of a tire building drum as it is expanded according to an embodiment of the present invention;

FIG. 5 is a cross-sectional view of a drum tile assembly of a tire building drum as it is expanded according to an embodiment of the present invention;

fig. 6 is a partial cross-sectional view of a drum tile assembly of a tire building drum according to an embodiment of the present invention.

In the figure:

100-a middle drum; 200-drum shaft; 300-side drum;

1-a drum tile assembly; 101-a cylindrical surface; 2-a stent assembly; 21-a first bevel;

11-a scaffold; 12-a drum tile unit;

111-a fastening screw;

121-drum tile; 122-a support; 123-guide sleeve;

1211-an accommodating tank; 1212-engaging teeth; 1213-meshing grooves; 1214-a second inclined plane;

1221-a guide groove;

1231-radial fastener; 1232-circumferential limit.

Detailed Description

In order to make the technical problems, technical solutions and technical effects achieved by the present invention more clear, the embodiments of the present invention will be described in further detail with reference to the accompanying drawings, and obviously, the described embodiments are only some embodiments, not all embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by those skilled in the art without creative efforts belong to the protection scope of the present invention.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. Wherein the terms "first position" and "second position" are two different positions.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection or a removable connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

The present embodiment provides a tire building drum, which includes a drum shaft 200, and a middle drum 100 and two side drums 300 that are fitted over the drum shaft 200, as shown in fig. 1 and 2. The middle drum 100 is located between two side drums 300, and the two side drums 300 are substantially symmetrically disposed. The middle drum 100 has a contracted state and an expanded state, and when the middle drum 100 is in the contracted state, the outer circumferential surface of the side drum 300 of the tire building drum and the outer circumferential surface of the middle drum 100 are spliced into a complete circumferential surface which can be used for receiving materials, namely, the tire building drum is in a flat drum material pasting state, as shown in fig. 1. When the middle drum 100 is in the expanded state, the outer circumferential surface of the middle drum 100 of the tire building drum is higher than the outer circumferential surface of the side drum 300, so that the drum shoulders on both sides of the middle drum 100 can provide a certain supporting force for the tire components in the turn-up or inflation shaping process, namely, the tire building drum is in the turn-up or inflation shaping state, as shown in fig. 2.

As shown in fig. 2-4, the middle drum 100 includes a tile assembly 1, two sets of expansion assemblies 2 and a reset member (not shown in the drawings), the two sets of expansion assemblies 2 are symmetrically disposed on two sides of the tile assembly 1, and each set of expansion assemblies 2 is connected to a corresponding side drum 300 and can axially move together with the side drum 300. In this embodiment, a screw rod is coaxially disposed in the hollow drum shaft 200, two thread segments with opposite thread directions but the same thread pitch are disposed on the screw rod, and a nut is disposed on each thread segment and connected to the side drum. The self-rotation of the screw rod can drive the two nuts and the two side drums to synchronously move relatively, thereby driving the two groups of expansion assemblies 2 to axially and synchronously move.

The expansion assembly 2 in this embodiment is also capable of being driven radially to expand or contract by a cylinder-like structure. When the expansion components 2 are radially expanded, the drum tile components 1 can be driven to radially expand along the drum shaft 200, and then the two groups of expansion components 2 axially move to enable a part of the expansion components 2 to contract on the radial inner side of the drum tile components 1, so that the process of transition from the flat drum material pasting state (flat width state) of the tire building drum to the turn-up or inflation shaping state (shaping width state) of the tire building drum is completed. When the expansion assembly 2 is radially contracted, the restoring member can be radially contracted to drive the drum tile assembly 1 to be contracted to a flat drum material-pasting state of the tire building drum as shown in fig. 1. It should be noted that, when the tile assembly 1 is contracted to the flat drum rubberized state of the tire building drum as shown in fig. 1, the outer peripheral wall of the tile assembly 1 can form a continuous cylindrical surface 101, so that when the tire building drum is rubberized or seamed on the cylindrical surface 101, no impression or poor seaming condition is caused due to the gap.

As shown in fig. 2, the expansion assembly 2 includes a plurality of large arc plates and small arc plates distributed at intervals in the circumferential direction, and when the expansion assembly 2 is radially expanded, the large arc plates and the small arc plates are engaged with each other to form a continuous circumferential surface. After the expansion assembly 2 is radially contracted, the large arc is positioned radially outward of the small arc, as shown in fig. 3.

As shown in fig. 3, the tile assembly 1 is in an expanded state, the expansion assembly 2 is in a contracted state, a first inclined surface 21 is arranged at a joint of the expansion assembly 2 and the tile assembly 1, a second inclined surface 1214 capable of being matched with the first inclined surface 21 is arranged on the tile assembly 1, when the expansion assembly 2 is expanded, the first inclined surface 21 abuts against the second inclined surface 1214, and therefore the expansion assembly 2 can drive the tile assembly 1 to move radially when being expanded. The first ramp 21 is also guided by the second ramp 1214 as the expansion assembly 2 moves axially so that the expansion assembly 2 is smoothly disposed radially inward of the drum tile assembly 1.

Alternatively, as shown in fig. 3 to 6, the tile assembly 1 includes a support 11 and a plurality of tile units 12, and the support 11 is sleeved and fixedly connected to the drum shaft 200. For assembly, referring to fig. 5, the bracket 11 may be formed by splicing two half-ring structures, and the two half-ring structures may be fixedly connected by fastening screws 111.

As shown in fig. 4 to 6, a plurality of the tile units 12 are distributed along the circumferential direction of the rack 11. The tile unit 12 includes a tile 121, a support 122 and a guide sleeve 123, and the guide sleeve 123 is fixedly connected to the bracket 11. One end of the supporting member 122 is slidably disposed on the bracket 11 along the radial direction of the bracket 11, and the other end is fixedly connected to the drum tile 121. Therefore, the supporting member 122 can be used for supporting the drum tile 121 and driving the drum tile 121 to slide, and the guide sleeve 123 can be used for guiding the supporting member 122 to slide along the radial direction of the bracket 11.

As shown in fig. 4 to 6, a plurality of engaging teeth 1212 are respectively disposed at intervals on both sides of each drum tile 121, an engaging groove 1213 is formed between two adjacent engaging teeth 1212, and the engaging teeth 1212 of each drum tile 121 can extend into the engaging groove 1213 of one adjacent drum tile 121. Therefore, the plurality of drum tiles 121 can be sequentially engaged end to end along the circumferential direction of the bracket 11 to form the continuous cylindrical surface 101. Therefore, when the material sticking operation is carried out, the cylindrical surface 101 has no gap, so that the condition that the sewing quality is not good due to the gap can not occur, and the production quality of the tire blank is improved. After the suturing is completed, the tile assembly 1 is in an expanded state, and the plurality of tiles 121 are spread apart in the circumferential direction of the stent 11, as shown in fig. 4.

Further, the radial outer surface of the drum tile 121 is concavely provided with a receiving groove 1211, the receiving grooves 1211 on the plurality of drum tiles 121 can be combined into a substantially continuous circular groove, and the restoring member can be placed in the circular groove. Preferably, the receiving groove 1211 is provided at one half of the drum tile 121. In this embodiment, for conveniently placing the piece that resets, holding tank 1211 is seted up along the circumference of tile subassembly 1, and the piece that resets can be spring or elasticity clamp, and the periphery of tile subassembly 1 is located to the cover, and it is effectual to kick-back reset.

As shown in fig. 5 and 6, the guide sleeve 123 is provided with a radial fastener 1231, and the guide sleeve 123 is fixedly connected to the bracket 11 through the radial fastener 1231. The radial fasteners 1231 are arranged in parallel with the supporting members 122, and the radial fasteners 1231 can be screws, so that materials are conveniently obtained, and the cost is low. In order to prevent the support 122 from rotating in the guide sleeve 123, optionally, a guide groove 1221 is provided on the support 122, and the guide groove 1221 extends along the sliding direction of the support 122, and the length thereof is the radial stroke of the drum tile 121. A circumferential limiting piece 1232 is disposed on the guide sleeve 123, and an end of the circumferential limiting piece 1232 extends into the guide groove 1221, so that the end of the circumferential limiting piece 1232 can only slide in the guide groove 1221. Therefore, the above-mentioned structure not only limits the sliding displacement of the supporting member 122, but also prevents the supporting member 122 and the drum tiles 121 fixed on the supporting member 122 from rotating relatively, thereby avoiding the fracture of the cylindrical surface 101 formed by splicing a plurality of drum tiles 121. Further, the circumferential limit part 1232 is perpendicular to the support 122, and the circumferential limit part 1232 may be a screw, so that the material is easy to obtain and the cost is low.

The tire building drum provided by the embodiment works substantially as follows:

as shown in fig. 1, the intermediate drum 100 is in a contracted state, at this time, the tile assembly 1 is in a contracted state under the elastic action of the reset piece, the tiles 121 of the plurality of tile units 12 are engaged along the circumferential direction of the bracket 11 to form a continuous cylindrical surface 101 for the stitching of the adhesive material, and the expansion assembly 2 is also in a contracted state, so that the tire building drum is in a flat and wide state, when the adhesive material is applied, the belt-shaped material wraps around the cylindrical surface 101 for a circle, and then the head and the tail of the belt-shaped material are pressed and stitched by a stitching device;

after the sewing is completed, the expanding assembly 2 provides acting force for the radial expansion of the drum tiles 121 along the drum shaft 200 by the cooperation of the first inclined surface 21 (shown in fig. 3) and the second inclined surface 1214 (shown in fig. 3) under the driving of the synchronous driving mechanism, as shown in fig. 6, the supporting member 122 fixedly connected with the drum tiles 121 slides in the guide sleeve 123 to guide the radial expansion of the drum tiles 121, the circumferential limiting member 1232 of the guide sleeve 123 is matched with the sliding slot of the supporting member 122 to limit the supporting member 122 to rotate in the guide sleeve 123, so as to ensure the radial expansion of the drum tiles 121 along the drum shaft 200 and prevent deviation, when the end of the circumferential limiting member 1232 abuts against the side wall of the sliding slot, the drum tiles 121 radially expand in place, as shown in fig. 2, at this time, the drum 100 is in an expanded state, and further performs an inflation shaping operation;

after the inflation shaping operation is completed, the expansion assembly 2 contracts, and the drum tile assembly 1 contracts to a contracted state (as shown in fig. 1) along the radial direction of the drum shaft 200 under the action of the resetting piece so as to be used for sewing the patch.

It should be noted that the foregoing is only a preferred embodiment of the present invention and the technical principles applied. It will be understood by those skilled in the art that the present invention is not limited to the particular embodiments illustrated herein, but is capable of various obvious modifications, rearrangements and substitutions without departing from the scope of the invention. Therefore, although the present invention has been described in greater detail with reference to the above embodiments, the present invention is not limited to the above embodiments, and may include other equivalent embodiments without departing from the scope of the present invention.

Claims

1. The utility model provides a tire building drum, includes drum shaft (200) and cover locate well drum (100) and two side drums (300) on drum shaft (200), well drum (100) are located two between side drum (300), its characterized in that, well drum (100) are including tile subassembly (1), expansion subassembly (2) and reset the piece, expansion subassembly (2) with side drum (300) are connected and can be together axial displacement, expansion subassembly (2) can radially expand in order to drive tile subassembly (1) radially expands, reset the piece and can radially contract in order to drive tile subassembly (1) radially contract, when tile subassembly (1) is in the shrink state, the periphery wall of tile subassembly (1) can form continuous face of cylinder (101).

2. Tyre building drum according to claim 1, characterized in that the drum tile assembly (1) comprises:

the bracket (11) is sleeved and connected to the drum shaft (200);

the drum tile units (12) are distributed along the circumferential direction of the support (11), each drum tile unit (12) comprises a drum tile (121), the drum tiles (121) are connected to the support (11) in a sliding mode, and the drum tiles (121) can be sequentially meshed end to end along the circumferential direction of the support (11) to form the continuous cylindrical surface (101).

3. Tyre building drum according to claim 2, characterised in that the tile unit (12) further comprises a support (122), one end of the support (122) being slidably arranged on the support (11) in the radial direction of the support (11) and the other end being connected to the tile (121).

4. Tyre building drum according to claim 3, characterised in that the radially outer surface of the drum tiles (121) is recessed with an accommodation groove (1211), the accommodation grooves (1211) of several of the drum tiles (121) being combined into a substantially continuous circular groove in which the return member is arranged.

5. Tyre building drum according to claim 3, wherein the tile unit (12) further comprises a guide sleeve (123), the guide sleeve (123) being connected to the support (11), the support (122) being slidably connected within the guide sleeve (123).

6. Tyre building drum according to claim 5, characterised in that the support (122) is provided with a guide groove (1221), the guide groove (1221) extending in the sliding direction of the support (122), the guide sleeve (123) being provided with a circumferential stop (1232), the end of the circumferential stop (1232) being slidably connected in the guide groove (1221).

7. Tyre building drum according to any one of claims 2-6, wherein the drum tiles (121) are provided at intervals with a plurality of engagement teeth (1212) on each side, and wherein an engagement groove (1213) is formed between two adjacent engagement teeth (1212), and wherein the engagement teeth (1212) of one drum tile (121) are capable of protruding into the engagement groove (1213) of another drum tile (121).

8. Tyre building drum according to any one of claims 2-6, in which a part of the expansion assembly (2) is retractable radially inside the drum tile assembly (1) when the expansion assembly (2) is moved axially.

9. Tyre building drum according to any one of claims 2-6, characterised in that the expansion assembly (2) is provided with a first ramp (21) at the junction with the drum tile (121), and that the drum tile (121) is provided with a second ramp (1214) able to cooperate with the first ramp (21).

10. Tyre building drum according to any one of claims 2-6, in which the support (11) is formed by two half-ring structures being spliced together.