CN214997661U - Combined type cutter head device of shield machine - Google Patents

Abstract

A combined type cutter head device of a shield tunneling machine comprises a cutter head body and a group of hob mounting frames, wherein the section of the cutter head body is circular; the detachable hob comprises a hob body, a first clamp, a second clamp and a hob mounting assembly, wherein the first clamp is arranged on the hob mounting frame at one end of a rotating shaft of the hob body, the other end of the rotating shaft of the hob body is connected with the hob mounting assembly, and the second clamp is arranged on the hob mounting assembly. Shield constructs combined type blade disc device of machine, clamp one can carry out the cutter pivot from the outside and fix, the mode that hobbing cutter installation component adopted the plug can reduce the use quantity of bolt, carry out the fixed of cutter pivot fast simultaneously to hobbing cutter installation component carries out the rolling fixedly from the cutter pivot is inside, has improved fixed stability, adopts above-mentioned fixed knot to construct for the hobbing cutter body installation is dismantled conveniently, uses manpower sparingly, and can improve the cost of maintenance of shield structure machine blade disc greatly.

Description

Combined type cutter head device of shield machine

Technical Field

The utility model belongs to the technical field of the super-huge special component shaping processing, specifically, relate to a shield constructs combined type blade disc device of machine.

Background

With the expansion of the construction scale of urban infrastructure and the larger demand of urban rail transit, the shield tunneling machine is widely used in tunnel engineering of subways, railways, highways, municipal works, hydropower and the like, and the demand of the shield tunneling machine as important equipment rises year by year.

The shield machine is an engineering apparatus for tunneling, mainly comprises a shield machine cutter head, a front shield and a rear shield, wherein in the tunneling, the shield machine cutter head excavates tunnel soil while the shield machine advances forwards along the axis of a tunnel. The excavation of the shield machine mainly depends on the rotation of the cutter head, and the cutter head directly influences the working efficiency of the shield machine.

A plurality of cutters such as cutters, edge scrapers, center cutters and the like are installed on a cutter disc of an existing shield machine, and due to the fact that the number of the cutters arranged on the disc is large, and the shield machine belongs to large-scale mechanical equipment, the size of the cutter disc of the shield machine is large, and the size of the cutters on the cutter disc is large. In the process of tunneling a cutter head of the shield tunneling machine, the cutter is seriously abraded, the damage degree of the cutter needs to be periodically checked, the cutter needs to be replaced, and a plurality of fasteners are adopted in the process of installing the cutter on the cutter head, so that the disassembly efficiency is seriously influenced in the process of replacing the cutter. Based on the problems in the prior art, a cutter head structure capable of conveniently and quickly disassembling a cutter is needed urgently.

SUMMERY OF THE UTILITY MODEL

Utility model purpose: the utility model aims at providing a shield constructs combined type blade disc device of machine has solved the cutter on the shield constructs the machine blade disc among the prior art, and the problem of difficulty is dismantled in the installation.

The technical scheme is as follows: the utility model provides a shield constructs combined type blade disc device of machine, including blade disc body and a set of hobbing cutter mounting bracket, the cross-section of blade disc body is circular, a set of hobbing cutter mounting bracket is fixed to be set up on the terminal surface of blade disc body, and a set of hobbing cutter mounting bracket uses the center of blade disc body as the centre of a circle and sets up according to the mode of annular array, be equipped with a set of removable hobbing cutter on the hobbing cutter mounting bracket, a set of removable hobbing cutter is a setting along the radial of blade disc body; the detachable hob comprises a hob body, a first clamp, a second clamp and a hob mounting assembly, the hob mounting assembly is fixedly arranged on the hob mounting frame, the first clamp is arranged on the hob mounting frame through one end of a rotating shaft of the hob body, the other end of the rotating shaft of the hob body is connected with the hob mounting assembly, and the second clamp is arranged on the hob mounting assembly.

Further, foretell shield constructs combined type blade disc device of machine, the hobbing cutter mounting bracket includes the fixed mounting panel one and a set of hobbing cutter mount pad that two symmetries set up, the fixed mounting panel one that two symmetries set up uses the radius of blade disc body to set up as symmetry axis symmetry, a set of hobbing cutter mount pad is fixed to be set up on the fixed mounting panel one that two symmetries set up to a set of hobbing cutter mount pad is a setting along the radial of blade disc body, the hobbing cutter body sets up on the hobbing cutter mount pad, hobbing cutter installation component is fixed to be set up on fixed mounting panel one.

Further, foretell shield constructs combined type blade disc device of machine, the hobbing cutter body includes cutter pivot, disc cutter one and disc cutter two are all fixed to be set up on the outer wall of cutter pivot, the both ends of cutter pivot all set up on the hobbing cutter mount pad, the one end of cutter pivot is passed through clamp one and is locked on the hobbing cutter mount pad to the other end and the hobbing cutter installation component of cutter pivot are connected.

Further, the combined type cutter head device of the shield machine comprises a hob mounting assembly, a hob limiting rod, a push block, a first spring, a limiting ring and two symmetrically arranged push block limiting assemblies, the fixed mounting seat is fixedly connected with the hob mounting seat, the hob limiting rod penetrates through the fixed mounting seat, the push block is sleeved on the hob limiting rod, the two symmetrically arranged push block limiting components are both arranged on the fixed mounting seat, and two symmetrically arranged push block limiting components are positioned at two sides of the push block, the outer walls at two sides of the push block are contacted with the push block limiting components, the limit ring is fixedly arranged on the hob limit rod, the spring is sleeved on the hob limit rod, and the spring is located between the limiting ring and the inner wall of the push block, and the second clamp can lock the hob limiting rod on the hob mounting seat.

Furthermore, in the composite cutter head device of the shield tunneling machine, a first hollow cavity is arranged in the middle of the fixed mounting seat, the hob limiting rod penetrates through the first hollow cavity, and the push block is located in the first hollow cavity.

Further, foretell shield constructs combined type blade disc device of machine, the inside of ejector pad is equipped with cavity two, the hobbing cutter gag lever post runs through cavity two, spring one and spacing ring all are located cavity two to the spacing ring sets up between the inner wall of spacing ring and cavity two.

Further, foretell shield constructs combined type blade disc device of machine, the spacing subassembly of ejector pad includes spring two and spacing lug, be equipped with spring mounting groove on the fixed mounting seat, spring mounting groove and the first intercommunication of well cavity, the fixed setting in spring mounting groove of the one end of spring two to the other end and the spacing lug of spring two are connected, spacing lug extensible to in the cavity is one and contact with the ejector pad.

Furthermore, foretell shield constructs combined type blade disc device of machine, the one end that the cutter pivot is close to hobbing cutter installation component is equipped with the mounting hole, the one end setting of hobbing cutter gag lever post is in the mounting hole.

Furthermore, in the composite cutter head device of the shield tunneling machine, the corners of the outer wall of the pushing block are all set to be round corners, and the end part of the limiting convex block extending to the first hollow cavity is an arc surface.

Further, foretell shield constructs combined type blade disc device of machine, be equipped with a set of bracket board on the blade disc body and the relative terminal surface of a set of hobbing cutter mounting bracket that is equipped with, a set of bracket board uses the center of blade disc body to set up according to annular array's mode as the centre of a circle.

Above-mentioned technical scheme can find out, the utility model discloses following beneficial effect has: shield constructs combined type blade disc device of machine, the traditional whole connected mode who locks the hobbing cutter through the bolt has been changed, set up outer mounting and inside mounting respectively at the both ends of cutter pivot, clamp one and hobbing cutter installation component promptly, clamp one can carry out the cutter pivot from the outside and fix, the mode of plug is adopted to hobbing cutter installation component, can reduce the use quantity of bolt, carry out the fixed of cutter pivot fast simultaneously, and hobbing cutter installation component carries out rolling fixed from the cutter pivot is inside, fixed stability has been improved, adopt above-mentioned fixed knot to construct, make hobbing cutter body installation dismantle conveniently, use manpower sparingly, and can improve the cost of maintenance that shield constructs the machine blade disc greatly, good using value has.

Drawings

Fig. 1 is a front view of a composite cutter head device of a shield tunneling machine according to the present invention;

fig. 2 is a left side view of the composite cutter head device of the shield tunneling machine of the present invention;

fig. 3 is a rear view of the composite cutter head device of the shield tunneling machine of the present invention;

FIG. 4 is an enlarged view of a portion of FIG. 1;

FIG. 5 is a schematic structural view of the hob mounting assembly and the hob body according to the present invention when they are connected;

fig. 6 is a schematic structural view of the hob mounting assembly and the hob body when they are separated.

In the figure: the hob head comprises a hob head body 1, a hob mounting frame 2, a first fixed mounting plate 21, a hob mounting seat 22, a detachable hob 3, a hob body 31, a hob rotating shaft 311, a first disc cutter 312, a second disc cutter 313, a mounting hole 314, a first hoop 32, a second hoop 33, a hob mounting component 34, a fixed mounting seat 341, a hob limiting rod 342, a push block 343, a first spring 344, a limiting ring 345, a push block limiting component 346, a first hollow cavity 347, a second hollow cavity 348, a second spring 349, a limiting lug 3410, a spring mounting groove 3411 and a bracket plate 4.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary and intended to be used for explaining the present invention, and should not be construed as limiting the present invention.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "clockwise", "counterclockwise" 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 to simplify the description, but do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be construed as limiting the present invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, unless otherwise specified, "a plurality" means two or more unless explicitly defined otherwise.

In the present invention, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "fixed" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally connected; 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 according to specific situations by those skilled in the art.

In the present disclosure, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may comprise direct contact between the first and second features, or may comprise contact between the first and second features not directly. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.

Example one

The combined type cutter head device of the shield tunneling machine shown in fig. 1-3 comprises a cutter head body 1 and a group of hob mounting frames 2, wherein the cross section of the cutter head body 1 is circular, the group of hob mounting frames 2 are fixedly arranged on the end face of the cutter head body 1, the group of hob mounting frames 2 are arranged in a mode of an annular array by taking the center of the cutter head body 1 as the circle center, a group of detachable hobs 3 are arranged on the hob mounting frames 2, and the group of detachable hobs 3 are arranged in a row along the radial direction of the cutter head body 1. The end face of the cutter head body 1 opposite to the end face of the cutter head body provided with the hob mounting frame 2 is provided with a group of cow leg plates 4, and the center of the cutter head body 1 is used as the center of a circle of the cow leg plates 4 and the cow leg plates are arranged in an annular array mode.

Wherein, as shown in fig. 4, the detachable hob 3 includes a hob body 31, a first hoop 32, a second hoop 33 and a hob mounting assembly 34, the hob mounting assembly 34 is fixedly arranged on the hob mounting frame 2, one end of the rotating shaft of the hob body 31 is arranged on the hob mounting frame 2 through the first hoop 32, and the other end of the rotating shaft of the hob body 31 is connected with the hob mounting assembly 34, and the second hoop 33 is arranged on the hob mounting assembly 34.

In addition, hobbing cutter mounting bracket 2 includes the fixed mounting panel 21 and a set of hobbing cutter mount pad 22 that two symmetries set up, the radius that the fixed mounting panel 21 that two symmetries set up used cutterhead body 1 sets up as symmetry axis symmetry, a set of hobbing cutter mount pad 22 is fixed to be set up on the fixed mounting panel 21 that two symmetries set up to a set of hobbing cutter mount pad 22 is a setting along the radial of cutterhead body 1, hobbing cutter body 31 sets up on hobbing cutter mount pad 22, hobbing cutter installation component 34 is fixed to be set up on fixed mounting panel 21. A set of hobbing cutter mount pad 22 welds on the fixed mounting panel 21 that two symmetries set up in proper order to correspond installation hobbing cutter body 31 on a set of hobbing cutter mount pad 22, hobbing cutter body 31 does not need to adopt too much bolt, conveniently connects through a clamp 32 and 34 locks on hobbing cutter mount pad 22 of hobbing cutter installation component.

In addition, hobbing cutter body 31 includes cutter pivot 311, a disc cutter 312 and a disc cutter 313 are all fixed to be set up on the outer wall of cutter pivot 311, the both ends of cutter pivot 311 all set up on hobbing cutter mount pad 22, the one end of cutter pivot 311 is locked on hobbing cutter mount pad 22 through a clamp 32 to the other end and the hobbing cutter installation component 34 of cutter pivot 311 are connected.

The hob body 31 is provided with the first disc cutter 312 and the second disc cutter 313, so that the working efficiency is improved, and more hob bodies 31 can be mounted on the hob body 1 with the same sectional area.

Example two

The hob mounting assembly 34 as shown in figures 5 and 6 comprises a fixed mounting base 341, a hob stop rod 342, a push block 343, a first spring 344, a stop ring 345 and two symmetrically arranged push block stop assemblies 346, the fixed mounting base 341 is fixedly connected with the hob mounting base 22, the hob limiting rod 342 penetrates through the fixed mounting base 341, the push block 343 is sleeved on the hob limiting rod 342, the two symmetrically arranged push block limiting components 346 are both arranged on the fixed mounting base 341, and two symmetrically arranged push block limiting assemblies 346 are positioned at two sides of the push block 343, the outer walls of the two sides of the push block 343 are in contact with the push block limiting assemblies 346, the limit ring 345 is fixedly arranged on the hob cutter limit rod 342, the first spring 344 is sleeved on the hob cutter limit rod 342, and the first spring 344 is located between the stop ring 345 and the inner wall of the push block 343, and the second clip 33 can lock the hob stop lever 342 on the hob mounting seat 22.

In the above structure, a first hollow cavity 347 is disposed in the middle of the fixed mounting base 341, the hob stop lever 342 penetrates through the first hollow cavity 347, and the push block 343 is located in the first hollow cavity 347. The inside of the push block 343 is provided with a second hollow cavity 348, the hob spacing rod 342 penetrates through the second hollow cavity 348, the first spring 344 and the spacing ring 345 are both located in the second hollow cavity 348, and the spacing ring 345 is arranged between the spacing ring 345 and the inner wall of the second hollow cavity 348.

In addition, the push block limiting assembly 346 comprises a second spring 349 and a limiting bump 3410, a spring installation groove 3411 is arranged on the fixed installation seat 341, the spring installation groove 3411 is communicated with the first hollow cavity 347, one end of the second spring 349 is fixedly arranged in the spring installation groove 3411, the other end of the second spring 349 is connected with the limiting bump 3410, and the limiting bump 3410 can extend into the first hollow cavity 347 and is in contact with the push block 343. The cutter rotating shaft 311 is provided with a mounting hole 314 at one end close to the hob mounting assembly 34, and one end of the hob limiting rod 342 is arranged in the mounting hole 314.

In addition, the corners of the outer wall of the push block 343 are rounded, and the end of the limiting protrusion 3410 extending to the first hollow cavity 347 is a cambered surface.

When the hob body 31 is installed, the first clamp 32 and the second clamp 33 are not installed, two ends of the cutter rotating shaft 311 are respectively erected on the hob installation seat 22, the first clamp 32 is sleeved outside the cutter rotating shaft 311, and the first clamp 32 is fixedly connected with the hob installation seat 22, so that the first clamp 32 is limited on the outer surface of the cutter rotating shaft 311, then the hob limiting rod 342 is pushed to press the hob limiting rod 342 towards the hob body 31, the hob limiting rod 342 drives the limiting ring 345 to compress the first spring 344, the compression amount of the first spring 344 is increased along with the continuous pushing of the hob limiting rod 342, the pressure of the first spring 344 on the push block 343 is increased, the thrust of the push block 343 acts on the limiting lugs 3410 of the two symmetrically-arranged push block limiting assemblies 346, so that the limiting lugs 3410 compress the second springs 349, when the pressure is increased to a certain degree, the limiting lugs 3410 are pressed into the spring installation grooves 3411, so that the limit protrusion 3410 loses the limit on the push block 343, the push block 343 moves toward the hob body 31 under the action of the pushing force, meanwhile, the hob cutter limiting rod 342 moves towards the hob cutter body 31, one end of the hob cutter limiting rod 342 close to the hob cutter body 31 is inserted into the cutter rotating shaft 311 (in the state shown in fig. 5), at this time, the limiting projection 3410 extends out under the elastic restoring force of the second spring 349 to limit the push block 343, so that the push block 343 is located at one side of the first hollow cavity 347 close to the hob cutter body 31, then, the second clamp 33 is locked on the hob mounting seat 22, so that the hob stop rod 342 is limited, the hob mounting assembly 34 limits the position of the hob body 31, the hob body 31 is stably fixed in an internal and external combination mode, meanwhile, the use of the bolts is reduced, and even if the bolts are installed and disassembled, the risk of loosening of the bolts is reduced.

When the hob body 31 is disassembled, the second clamping band 33 is firstly disassembled from the hob mounting seat 22, then the end of the hob limiting rod 342 far away from the hob body 31 is pulled by the pulling tool, because the limiting ring 345 is fixedly connected with the hob limiting rod 342, the limiting ring 345 moves synchronously, and because the limiting ring 345 is attached to the inner wall of the push block 343, the push block 343 is driven by the limiting ring 345 to move synchronously, the pressure of the push block 343 is applied to the limiting lugs 3410 of the two symmetrically arranged push block limiting components 346, so that the limiting lugs 3410 compress the second springs 349, when the pressure is increased to a certain degree, the limiting lugs 0 are pressed into the spring mounting grooves 3411, so that the limiting lugs 3410 lose the limit on the push block 343, the push block 343 moves away from the hob body 31 under the thrust action until the push block 343 is attached to the inner wall of the fixed mounting seat 341 far away from the end of the hob body 31 (i.e. the state shown in fig. 6), at this time, one end of the hob cutter limiting rod 342 close to the hob cutter body 31 is pulled out from the hob cutter rotating shaft 311, the hob cutter limiting rod 342 is separated from the hob cutter body 31, and then the first clamp 32 is opened, so that the hob cutter body 31 can be separated from the hob cutter mounting seat 22.

The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, a plurality of modifications can be made without departing from the principles of the present invention, and these modifications should also be regarded as the protection scope of the present invention.

Claims (10)

1. The utility model provides a shield constructs combined type blade disc device of machine which characterized in that: the cutter head comprises a cutter head body (1) and a group of hob mounting frames (2), wherein the cross section of the cutter head body (1) is circular, the group of hob mounting frames (2) are fixedly arranged on the end face of the cutter head body (1), the group of hob mounting frames (2) are arranged in an annular array mode by taking the center of the cutter head body (1) as the center of a circle, a group of detachable hobs (3) are arranged on the hob mounting frames (2), and the group of detachable hobs (3) are arranged in a row along the radial direction of the cutter head body (1);

wherein, can dismantle hobbing cutter (3) and include hobbing cutter body (31), clamp (32), clamp two (33) and hobbing cutter installation component (34), hobbing cutter installation component (34) are fixed to be set up on hobbing cutter mounting bracket (2), the one end of hobbing cutter body (31) pivot is passed through clamp (32) and is set up on hobbing cutter mounting bracket (2) to the other end and the hobbing cutter installation component (34) of hobbing cutter body (31) pivot are connected, clamp two (33) set up on hobbing cutter installation component (34).

2. The composite cutter head device of the shield tunneling machine according to claim 1, wherein: hobbing cutter mounting bracket (2) include the fixed mounting panel (21) and a set of hobbing cutter mount pad (22) that two symmetries set up, the radius that fixed mounting panel (21) that two symmetries set up with blade disc body (1) sets up for symmetry axis symmetry, a set of hobbing cutter mount pad (22) is fixed to be set up on fixed mounting panel (21) that two symmetries set up to a set of hobbing cutter mount pad (22) is a setting along the radial of blade disc body (1), hobbing cutter body (31) sets up on hobbing cutter mount pad (22), hobbing cutter installation component (34) are fixed to be set up on fixed mounting panel (21).

3. The composite cutter head device of the shield tunneling machine according to claim 1, wherein: hobbing cutter body (31) includes cutter pivot (311), disc cutter one (312) and disc cutter two (313) are all fixed to be set up on the outer wall of cutter pivot (311), the both ends of cutter pivot (311) all set up on hobbing cutter mount pad (22), the one end of cutter pivot (311) is passed through clamp one (32) and is locked on hobbing cutter mount pad (22) to the other end and the hobbing cutter installation component (34) of cutter pivot (311) are connected.

4. The composite cutter head device of the shield tunneling machine according to claim 3, wherein: the hob mounting assembly (34) comprises a fixed mounting base (341), a hob limiting rod (342), a push block (343), a first spring (344), a limiting ring (345) and two symmetrically arranged push block limiting assemblies (346), the fixed mounting base (341) is fixedly connected with the hob mounting base (22), the hob limiting rod (342) penetrates through the fixed mounting base (341), the push block (343) is sleeved on the hob limiting rod (342), the two symmetrically arranged push block limiting assemblies (346) are both arranged on the fixed mounting base (341), the two symmetrically arranged push block limiting assemblies (346) are positioned at two sides of the push block (343), outer walls at two sides of the push block (343) are in contact with the push block limiting assemblies (346), the limiting ring (345) is fixedly arranged on the hob limiting rod (342), the first spring (344) is sleeved on the hob limiting rod (342), and the first spring (344) is positioned between the limiting ring (345) and the inner wall of the push block (343), and the second clamp (33) can lock the hob limiting rod (342) on the hob mounting seat (22).

5. The composite cutter head device of the shield tunneling machine according to claim 4, wherein: the middle position of the fixed mounting base (341) is provided with a first hollow cavity (347), the hob limiting rod (342) penetrates through the first hollow cavity (347), and the push block (343) is located in the first hollow cavity (347).

6. The composite cutter head device of the shield tunneling machine according to claim 4, wherein: the inner part of the push block (343) is provided with a second hollow cavity (348), the hob limiting rod (342) penetrates through the second hollow cavity (348), the first spring (344) and the limiting ring (345) are both located in the second hollow cavity (348), and the limiting ring (345) is arranged between the limiting ring (345) and the inner wall of the second hollow cavity (348).

7. The composite cutter head device of the shield tunneling machine according to claim 5, wherein: the push block limiting assembly (346) comprises a second spring (349) and a limiting bump (3410), a spring mounting groove (3411) is formed in the fixed mounting seat (341), the spring mounting groove (3411) is communicated with the first hollow cavity (347), one end of the second spring (349) is fixedly arranged in the spring mounting groove (3411), the other end of the second spring (349) is connected with the limiting bump (3410), and the limiting bump (3410) can extend into the first hollow cavity (347) and is in contact with the push block (343).

8. The composite cutter head device of the shield tunneling machine according to claim 4, wherein: one end of the cutter rotating shaft (311) close to the hob mounting component (34) is provided with a mounting hole (314), and one end of the hob limiting rod (342) is arranged in the mounting hole (314).

9. The composite cutter head device of the shield tunneling machine according to claim 7, wherein: the corners of the outer wall of the push block (343) are all set to be round corners, and the end part of the limit lug (3410) extending to the first hollow cavity (347) is an arc surface.

10. The composite cutter head device of the shield tunneling machine according to claim 1, wherein: the cutter head body (1) and the end face which is provided with a group of hob mounting frames (2) and is opposite to each other are provided with a group of bracket plates (4), and the center of the cutter head body (1) is used as the center of a circle for the group of bracket plates (4) to be arranged according to an annular array mode.

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