CN212244782U - Automatic garbage classification processing system for high-rise building - Google Patents

Automatic garbage classification processing system for high-rise building Download PDF

Info

Publication number
CN212244782U
CN212244782U CN202021403459.3U CN202021403459U CN212244782U CN 212244782 U CN212244782 U CN 212244782U CN 202021403459 U CN202021403459 U CN 202021403459U CN 212244782 U CN212244782 U CN 212244782U
Authority
CN
China
Prior art keywords
garbage
trolley
door
dumping
throwing
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
CN202021403459.3U
Other languages
Chinese (zh)
Inventor
曹占龙
吴兢
何俊波
向纪华
周敬之
石昊
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Hubei University of Automotive Technology
Original Assignee
Hubei University of Automotive Technology
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Hubei University of Automotive Technology filed Critical Hubei University of Automotive Technology
Priority to CN202021403459.3U priority Critical patent/CN212244782U/en
Application granted granted Critical
Publication of CN212244782U publication Critical patent/CN212244782U/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

Landscapes

  • Refuse Collection And Transfer (AREA)

Abstract

The utility model discloses an automatic waste classification system for high-rise buildings, which comprises a trolley transportation well, a waste temporary storage device, a waste collection trolley and a waste transportation trolley, wherein the waste temporary storage device is provided with a plurality of waste temporary storage devices which are arranged in the trolley transportation well at equal intervals, the waste collection trolley is arranged in the trolley transportation well, the waste transportation trolley is arranged at the bottom of the trolley transportation well, the top of the trolley transportation well is provided with a transportation mechanism consisting of a traction machine, a dovetail groove guide rail, a counterweight part and a traction rope, and the transportation mechanism is connected with the waste collection trolley; the system can accurately classify the garbage, save the time of residents, save human resources, prevent the garbage from being exposed in the open air and directly transported away, protect the air and the environment, and realize more automation of centralized garbage treatment.

Description

Automatic garbage classification processing system for high-rise building
Technical Field
The utility model relates to a domestic waste classification technical field specifically is automatic waste classification system of high-rise building.
Background
With the rapid development and the great improvement of the living standard of people, high-rise buildings are increasingly common. The development of high-rise buildings brings a series of inconvenience for cleaning the garbage on the high-rise buildings. With the development of living standard, the way of cleaning the garbage on the high buildings is changed continuously, from the initial manual packing and self-cleaning to the following public garbage passage of the high buildings, and then returning to the current self-packing and cleaning, thereby forming a cycle. The garbage channel seems to be time-saving and labor-saving compared with self-packing cleaning from the surface, but is replaced by manual cleaning. The disadvantage of this refuse chute is that the refuse cannot be sorted.
The classified recovery of garbage is an important means for reducing environmental pollution and building a conservation-oriented society. There are two main types of existing approaches for waste classification: the large-batch garbage is classified in a garbage field in a centralized way, but the accurate classification is difficult to realize; or the manual garbage throwing source is utilized to divide the garbage into a plurality of categories according to the regulations, in this case, a throwing person is required to have higher personal quality and general knowledge of garbage classification basis, and the method has low accuracy.
The existing garbage disposal mode of a community is roughly as follows: after the garbage is packaged, the residential building in the residential area takes the garbage to a temporary garbage placing point below the residential area from home by himself sitting on the elevator. This method is somewhat cumbersome for the household because the work is busy for one day and the household must be returned to the home to dispose of the garbage generated by the household for one day. And the garbage can is placed under the floor in the residential area, so that the peculiar smell is greatly placed in the open air, the ecological environment is influenced, and inconvenience is brought to residents. Place the garbage bin downstairs in district, still need the manpower to shift rubbish and transport rubbish station, so not only extravagant manpower resources, the transportation of garbage truck brings the pollution for the resident family in district moreover, including environmental pollution, noise pollution etc..
Aiming at the situation, the intelligent garbage treatment system for the high-rise building can be designed by combining problems, and the problems of garbage classification, transportation, concentration and the like are solved.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide an automatic waste classification processing system of high-rise building to solve the problem that proposes among the above-mentioned background art.
In order to achieve the above object, the utility model provides a following technical scheme:
automatic waste classification processing system of high-rise building, including dolly transportation well, rubbish temporary storage device, refuse collection dolly and rubbish travelling bogie, rubbish temporary storage device has a plurality ofly and is located equidistant setting in the dolly transportation well, and the rubbish collection dolly is located the dolly transportation well, and the rubbish travelling bogie is located dolly transportation well bottom, is equipped with at dolly transportation well top by hauler, dovetail guide rail, to heavy part and tow the transport mechanism that the rope constitutes, and transport mechanism is connected with the rubbish collection dolly.
The garbage temporary storage device comprises a throwing device and a pushing device, the throwing device comprises a throwing door, a garbage partition plate, a throwing port baffle and a garbage throwing outlet surrounding plate, and the throwing door, the garbage partition plate, the garbage throwing outlet surrounding plate and the throwing port baffle are respectively connected with corresponding main servo motors through gears; the pushing device is composed of a pushing mechanism and a sliding groove, and the pushing mechanism and the sliding groove are provided with independent driving motors.
The garbage collection trolley is characterized in that a collection trolley motor transmission mechanism is arranged on a top plate of the garbage collection trolley and provided with a bevel gear combination, the bevel gear combination is provided with two bevel gears meshed with each other, the two bevel gears are respectively butted with a garbage collection trolley box body and a transmission motor, a side door is arranged on the side face of the garbage collection trolley box body and connected with a synchronous motor through a synchronous belt, a collection trolley bottom dumping mechanism is arranged at the bottom of the garbage collection trolley and comprises five first valve leaves driven by an adjusting servo motor, a dumping channel plate is arranged above the first valve leaves, the first valve leaves are rotatably installed on a fixed ring, and the door leaves of the first valve leaves are fixed through a linkage outer ring.
And a plurality of steel wire ropes with butted tops are arranged on the garbage collection trolley and are used for being butted with the transportation mechanism.
The garbage transport trolley comprises a trolley body, an automatic adjusting mechanism, a transport trolley motor transmission mechanism and a transport trolley bottom dumping mechanism, wherein the transport trolley bottom dumping mechanism is positioned below the trolley body, two sides of the transport trolley bottom dumping mechanism are slidably mounted on a track through the transport trolley motor transmission mechanism, the transport trolley bottom dumping mechanism is provided with five second valve leaf doors which are driven by an external servo motor, a dumping top annular plate and a dumping middle annular plate are respectively arranged on the upper side and the lower side of each second valve leaf door, and two adjacent second valve leaf doors are in transmission connection through a connecting rod; the bottom of the dumping mechanism at the bottom of the transport trolley is provided with a dumping bottom plate.
As the preferred scheme of the utility model: a door handle is arranged on the side surface of the first valve leaf door; and a manual adjusting handle is arranged on the side surface of the second valve leaflet door.
Compared with the prior art, the beneficial effects of the utility model are that: the system can accurately classify the garbage, save the time of residents, save the manpower, directly transport the garbage away without exposing the garbage in the open air, protect the air and the environment, and realize the more automation of the centralized garbage treatment.
Drawings
Fig. 1 is an overall structure diagram of the present invention.
Fig. 2 is an exploded view of the main structure of the present invention.
Fig. 3 is an explosion diagram of the structure of the garbage temporary storage device of the present invention.
Fig. 4 is an explosion diagram of the structure of the middle throwing device of the present invention.
Fig. 5 is a perspective view of the garbage collecting cart of the present invention.
Fig. 6 is an enlarged view of the motor transmission mechanism of the middle collecting trolley of the utility model.
Fig. 7 is a top view of the bottom dumping mechanism of the middle collecting trolley of the present invention.
Fig. 8 is an exploded view of the bottom dumping mechanism of the middle collecting trolley of the present invention.
Fig. 9 is a perspective view of the structure of the garbage transporting cart of the present invention.
Fig. 10 is a perspective view of the bottom tilting mechanism of the middle transportation trolley of the present invention.
Fig. 11 is an exploded view of the bottom dumping mechanism of the middle transportation trolley of the present invention.
In the figure 1-trolley transport shaft, 2-garbage temporary storage device, 21-throwing device, 22-pushing device, 23-chute, 24-pushing mechanism, 211-main servo motor, 212-throwing door, 213-garbage clapboard, 214-garbage throwing outlet coaming, 215-throwing port baffle, 216-gear, 3-garbage collection trolley, 31-collection trolley motor transmission mechanism, 311-bevel gear combination, 32-steel wire rope, 33-synchronous motor, 331-synchronous belt, 34-garbage collection trolley box, 35-collection trolley bottom dumping mechanism, 3511-dumping channel plate, 3512-adjusting servo motor, 3513-first flap door, 3514-door handle, 3515-fixed ring, 4-garbage transport trolley, 41-an automatic adjusting mechanism, 42-a motor transmission mechanism of the transport trolley; 43. wagon bottom dump mechanism, 431-dump top ring plate, 432-second lobe gate, 433-link, 434-dump middle ring plate, 435-dump bottom plate, 436-manual adjustment handle.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work 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 "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
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, and may be, for example, 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 in specific cases to those skilled in the art.
Example 1:
referring to fig. 1-11, the automatic waste classification system for high-rise buildings comprises a trolley transportation well 1, a plurality of waste temporary storage devices 2, a waste collection trolley 3 and a waste transportation trolley 4, wherein the waste temporary storage devices 2 are arranged in the trolley transportation well 1 at equal intervals, the waste collection trolley 3 is arranged in the trolley transportation well 1, the waste transportation trolley 4 is arranged at the bottom of the trolley transportation well 1, a transportation mechanism consisting of a traction machine, a dovetail groove guide rail, a counterweight part and a traction rope is arranged at the top of the trolley transportation well 1, and the transportation mechanism is connected with the waste collection trolley 3.
When the garbage collecting trolley works, the traction motor drives the traction wheel to rotate after the speed of the speed reducer is changed, and the garbage collecting trolley 3 and the counterweight move up and down relatively by virtue of traction force generated by friction between the traction wheel and the traction wheel, so that the garbage collecting trolley 3 can move up and down freely to reach each layer to collect garbage.
The garbage temporary storage device 2 comprises a throwing device 21 and a pushing device 22, the throwing device 21 comprises a throwing door 212, a garbage partition plate 213, a throwing port baffle 215 and a garbage throwing port enclosing plate 214, the throwing door 212, the garbage partition plate 213, the garbage throwing port enclosing plate 214 and the throwing port baffle 215 are respectively connected with corresponding main servo motors 211 through gears 216, when the garbage is thrown, the throwing door 212 is opened under the driving of the main servo motors 211, the garbage partition plate 213 is driven to rotate to a proper position through the main servo motors 211 to correspond to a throwing port, and after the garbage collection trolley 3 is in place, the garbage throwing port enclosing plate 214 rotates under the action of the corresponding main servo motors 211 to enable gaps of the garbage throwing channel to correspond to sequentially enable the garbage in the throwing device 21 to fall into the garbage channel; pusher 22 comprises push mechanism 24 and spout 23, and push mechanism 24 and spout 23 have independent driving motor, can with fall into rubbish propelling movement to the rubbish collection dolly 3 of rubbish passageway the inside, because there is the hole between rubbish temporary storage device 2 and the rubbish collection dolly 3, through setting up of spout 23 and stretch out and draw back through driving motor drive spout 23, guarantee the complete transfer of rubbish.
In the process that the garbage in the garbage temporary storage device 2 enters the garbage collection trolley 3, the garbage collection trolley 3 needs to rotate because different types of garbage need to be classified and only one side surface of the garbage collection trolley 3 corresponds to the garbage temporary storage device 2, so that classification is finished; the garbage collection trolley is characterized in that a collection trolley motor transmission mechanism 31 is arranged on the top plate of the garbage collection trolley 3, the collection trolley motor transmission mechanism 31 is provided with a bevel gear assembly 311, the bevel gear assembly 311 is provided with two bevel gears which are meshed with each other, the two bevel gears are respectively butted with a garbage collection trolley box body 34 and a transmission motor, the garbage collection trolley box body 34 is powered through the bevel gear assembly 311, a side door is arranged on the side surface of the garbage collection trolley box body 34 and is connected with a synchronous motor 33 through a synchronous belt 331, the synchronous motor 33 drives the synchronous belt 331 to rotate and can drive the side door to move in the vertical direction, a collection trolley bottom dumping mechanism 35 is arranged at the bottom of the garbage collection trolley 3, the collection trolley bottom dumping mechanism 35 comprises five first valve leaflet doors 3513 driven by an adjusting servo motor 3512, a dumping channel plate 3511 is arranged above the first valve leaflet doors 3513, and is rotatably arranged on a fixing, the door leaf of first valve leaflet door 3513 is fixed through the linkage outer loop, and at the during operation, adjust servo motor 3512 and drive first valve leaflet door 3513 and carry out synchronous revolution, the synchronous equidimension of different rubbish is to the whereabouts, the back is opened to the door, in rubbish gets into the extension passageway on the channel board 3511 of empting, the extension passageway adopts the same structural style with rubbish storage device, can play the effect that prevents the rubbish dispersion and drop again when increasing rubbish storage device capacity, ensure that rubbish accurately gets into 4 appointed spaces of rubbish travelling bogie.
Furthermore, a plurality of steel wire ropes 32 with butted tops are arranged on the garbage collecting trolley 3, and the steel wire ropes 32 are used for being butted with the transportation mechanism.
The garbage transport trolley 4 is used for collecting garbage thrown by a vertically upper conveying garbage elevator, when the garbage is completely collected on floors by the conveying garbage elevator, the garbage transport trolley 4 receives a signal and stands by at a position vertical to an elevator shaft, and a precision sensor is used for judging whether the positioning is accurate and adjusting the positioning; the garbage transport trolley 4 comprises a trolley body, an automatic adjusting mechanism 41, a transport trolley motor transmission mechanism 42 and a transport trolley bottom dumping mechanism 43, wherein the transport trolley bottom dumping mechanism 43 is located below the trolley body, two sides of the transport trolley bottom dumping mechanism 43 are slidably mounted on a rail through the transport trolley motor transmission mechanism 42, the position of the garbage transport trolley 4 is adjusted, the garbage collection trolley 3 is accurately abutted, so that garbage above the garbage collection trolley falls into the garbage collection trolley, after one-time garbage storage is finished, the garbage is conveyed to a garbage concentration center of a community through the rail, the transport trolley bottom dumping mechanism 43 is provided with five second flap doors 432 which are fully moved by an external servo motor, a dumping top annular plate 431 and a dumping middle annular plate 434 are respectively arranged on the upper side and the lower side of each second flap door 432, two adjacent second flap doors 432 are in transmission connection through a connecting rod 433, when the external servo motor works, the five second flap doors 432 can be driven to synchronously rotate and open, so that the garbage can enter; a dump bottom plate 435 is provided at the bottom of the dump mechanism 43 at the bottom of the transport cart for allowing the waste to be quickly discharged to a collection center when opened.
Example 2:
on the basis of embodiment 1, a door handle 3514 is arranged on the side of the first leaflet door 3513, so that a person can conveniently open the first leaflet door 3513 manually for maintenance work when the servo motor 3512 is adjusted to be in fault; the side surface of the second valve leaf door 432 is provided with a manual adjusting handle 436, so that a worker can conveniently open the valve manually to perform maintenance work when the external servo motor fails.
It is obvious to a person skilled in the art that the invention is not restricted to details of the above-described exemplary embodiments, but that it can be implemented in other specific forms without departing from the spirit or essential characteristics of the invention. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.
Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.

Claims (6)

1. Automatic waste classification processing system of high-rise building, its characterized in that, including dolly transportation well (1), rubbish temporary storage device (2), garbage collection dolly (3) and rubbish travelling bogie (4), rubbish temporary storage device (2) have a plurality ofly and lie in equidistant setting in dolly transportation well (1), and rubbish collection dolly (3) lie in dolly transportation well (1), and rubbish travelling bogie (4) lie in dolly transportation well (1) bottom, are equipped with at dolly transportation well (1) top by hauler, dovetail guide rail, to the transport mechanism that weight part and tow rope constitute, and transport mechanism is connected with rubbish collection dolly (3).
2. The automatic garbage classification system for the high-rise building according to claim 1, wherein the garbage temporary storage device (2) comprises a throwing device (21) and a pushing device (22), the throwing device (21) comprises a throwing door (212), a garbage partition plate (213), a throwing opening baffle plate (215) and a garbage throwing outlet enclosing plate (214), and the throwing door (212), the garbage partition plate (213), the garbage throwing outlet enclosing plate (214) and the throwing opening baffle plate (215) are respectively connected with a corresponding main servo motor (211) through gears (216); the pushing device (22) is composed of a pushing mechanism (24) and a sliding groove (23), and the pushing mechanism (24) and the sliding groove (23) are provided with independent driving motors.
3. The automatic garbage classification system for high-rise buildings according to claim 2, wherein the garbage collection cart (3) is provided with a collection cart motor transmission mechanism (31) on the top plate, the collection cart motor transmission mechanism (31) is provided with a bevel gear assembly (311), the bevel gear assembly (311) is provided with two bevel gears which are engaged with each other, the two bevel gears are respectively abutted with the garbage collection cart box body (34) and the transmission motor, the side door is arranged on the side surface of the garbage collection cart box body (34) and is connected with the synchronous motor (33) through a synchronous belt (331), the bottom of the garbage collection cart (3) is provided with a collection cart bottom dumping mechanism (35), the collection cart bottom dumping mechanism (35) comprises five first flap doors (3513) driven by a regulating servo motor (3512), a dumping channel plate (3511) is arranged above the first flap doors (3513), the first flap door (3513) is rotatably mounted on a fixed ring (3515), and the door leaf of the first flap door (3513) is fixed by a linkage outer ring.
4. The automatic waste sorting system for high-rise buildings according to claim 3, wherein a plurality of top-butted wire ropes (32) are provided on the waste collection cart (3) for butting against the transport mechanism.
5. The automatic garbage classification system for the high-rise buildings according to claim 3, wherein the garbage transport trolley (4) comprises a trolley body, an automatic adjusting mechanism (41), a transport trolley motor transmission mechanism (42) and a transport trolley bottom dumping mechanism (43), the transport trolley bottom dumping mechanism (43) is located below the trolley body, two sides of the transport trolley bottom dumping mechanism (43) are slidably mounted on the track through the transport trolley motor transmission mechanism (42), the transport trolley bottom dumping mechanism (43) is provided with five second flap doors (432) which are fully moved by external servo motors, a dumping top annular plate (431) and a dumping middle annular plate (434) are respectively arranged on the upper side and the lower side of each second flap door (432), and two adjacent second flap doors (432) are in transmission connection through a connecting rod (433); a dumping bottom plate (435) is arranged at the bottom of the dumping mechanism (43) at the bottom of the transport trolley.
6. The automatic garbage classification system for high-rise buildings according to claim 5, wherein the first flap door (3513) is provided with a door handle (3514) at the side; and a manual adjusting handle (436) is arranged on the side surface of the second valve leaf door (432).
CN202021403459.3U 2020-07-16 2020-07-16 Automatic garbage classification processing system for high-rise building Active CN212244782U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202021403459.3U CN212244782U (en) 2020-07-16 2020-07-16 Automatic garbage classification processing system for high-rise building

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202021403459.3U CN212244782U (en) 2020-07-16 2020-07-16 Automatic garbage classification processing system for high-rise building

Publications (1)

Publication Number Publication Date
CN212244782U true CN212244782U (en) 2020-12-29

Family

ID=73980212

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202021403459.3U Active CN212244782U (en) 2020-07-16 2020-07-16 Automatic garbage classification processing system for high-rise building

Country Status (1)

Country Link
CN (1) CN212244782U (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113233062A (en) * 2021-04-09 2021-08-10 李建波 Classification method and system for intelligent garbage classification barrel
CN113233061A (en) * 2021-04-09 2021-08-10 李建波 Method and system for collecting and transporting intelligent garbage can

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113233062A (en) * 2021-04-09 2021-08-10 李建波 Classification method and system for intelligent garbage classification barrel
CN113233061A (en) * 2021-04-09 2021-08-10 李建波 Method and system for collecting and transporting intelligent garbage can
CN113233061B (en) * 2021-04-09 2022-05-17 李建波 Method and system for collecting and transporting intelligent garbage can

Similar Documents

Publication Publication Date Title
CN111907988A (en) Automatic garbage classification processing system for high-rise building
CN212244782U (en) Automatic garbage classification processing system for high-rise building
CN204126210U (en) A kind of garbage from high buildings monitoring and transport cleaning integral system
CN106677491B (en) Vertical circulation type garbage collection and automatic dumping device
CN111703762A (en) Many functions of intelligence automatic classification dustbin
CN212314521U (en) Domestic waste source classification sorting equipment
CN110902216A (en) Multiple categorised rubbish transfer device
CN214494309U (en) Intelligent garbage can
CN112124813A (en) Intelligent garbage can device capable of actively classifying garbage
CN104217777B (en) Sorting glove box used for classifying radioactive waste
CN111530890B (en) Household garbage treatment system
CN111319890A (en) Classification guiding device of building garbage recycling pipeline and control method thereof
CN207658460U (en) A kind of categorized consumer waste collection device
CN113200257A (en) Outdoor artificial intelligence waste classification and clearance cooperation equipment
CN214358056U (en) Corridor rubbish intelligent processing device
CN212638664U (en) Classified garbage throwing, collecting and transmitting system
CN113060437B (en) Intelligent garbage classification and recovery system for urban community
CN211077206U (en) Garbage collection system for multi-storey building
CN210652014U (en) Movable vertical garbage classification compression device with underground turnplate
CN210527478U (en) Fixed garbage classification and collection system
CN100398420C (en) Mansion garbage transporter with turing type changeable working position
CN210316382U (en) District is rubbish processing mechanism futilely
CN201647529U (en) Automatic transportation ladder for biochemical and medical waste and general waste
RU86574U1 (en) DEVICE FOR DRAWING HOUSEHOLD IN A RESIDENTIAL HOUSE
CN216140690U (en) Dirty clothing and bedding collecting and conveying system

Legal Events

Date Code Title Description
GR01 Patent grant
GR01 Patent grant