CN210994205U - Automatic trolley mechanism of transport vehicle used before cutting soil conditioner slurry - Google Patents

Automatic trolley mechanism of transport vehicle used before cutting soil conditioner slurry Download PDF

Info

Publication number
CN210994205U
CN210994205U CN201921770112.XU CN201921770112U CN210994205U CN 210994205 U CN210994205 U CN 210994205U CN 201921770112 U CN201921770112 U CN 201921770112U CN 210994205 U CN210994205 U CN 210994205U
Authority
CN
China
Prior art keywords
guide rail
soil conditioner
fixture block
material containing
moving frame
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
CN201921770112.XU
Other languages
Chinese (zh)
Inventor
李学贵
张建荣
郜英豪
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.)
Zhangjiakou Genliduo Ecological Agricultural Technology Co ltd
Original Assignee
Zhangjiakou Genliduo Ecological Agricultural Technology Co ltd
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 Zhangjiakou Genliduo Ecological Agricultural Technology Co ltd filed Critical Zhangjiakou Genliduo Ecological Agricultural Technology Co ltd
Priority to CN201921770112.XU priority Critical patent/CN210994205U/en
Application granted granted Critical
Publication of CN210994205U publication Critical patent/CN210994205U/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

Landscapes

  • Accessories For Mixers (AREA)

Abstract

The utility model belongs to the technical field of biomaterial processing equipment, a soil conditioner thick liquids are cut with transport vechicle automatic pushing mechanism before providing, including guide rail one, fixed setting is between mixer and cutting machine, and guide rail two sets up one side of guide rail one, and with guide rail one is parallel, removes the frame, removes the setting and is in on the guide rail two, drag the link gear, including fixture block and pivot, the both ends of pivot are all rotated and are set up remove on the frame, the fixture block is fixed to be set up in the pivot, when not receiving external force, the height of fixture block one end is greater than remove the height of frame, flourishing material dolly sets up guide rail one is last, flourishing material dolly bottom is provided with the recess, the one end of fixture block one is used for the card to establish in the recess, power unit drives the moving frame moves on the guide rail two. Through the technical scheme, the problem of high labor intensity in the soil conditioner processing process in the prior art is solved.

Description

Automatic trolley mechanism of transport vehicle used before cutting soil conditioner slurry
Technical Field
The utility model belongs to the technical field of biomaterial processing equipment, a with transport vechicle automatic pushing car mechanism before cutting is related to soil conditioner thick liquids.
Background
The Soil Conditioner is a product which is processed by taking natural mineral substances (dolomite, limestone and shale containing potassium) as main raw materials through high-temperature steam-curing hydrothermal reaction, and has three very remarkable Soil conditioning performances of water retention, weight gaining and air permeability. In the processing process of the soil conditioner, raw materials are ground into powder, the powder is stirred in a stirrer, water is added to the powder to prepare slurry, the slurry is cut and then sent into a steam-curing kettle for steam-curing, at present, the slurry needs to be sent into the steam-curing kettle from the stirrer manually, and the manual labor intensity is high.
SUMMERY OF THE UTILITY MODEL
The utility model provides a before cutting, soil conditioner thick liquids have solved the problem that artifical intensity of labour is big among the prior art in the soil conditioner course of working with transport vechicle automatic pushing mechanism.
The technical scheme of the utility model is realized like this: comprises that
The first guide rail is fixedly arranged between the stirring machine and the cutting machine,
a second guide rail which is arranged on one side of the first guide rail and is parallel to the first guide rail,
the moving frame is movably arranged on the second guide rail,
the towing mechanism comprises a clamping block and a rotating shaft, both ends of the rotating shaft are rotatably arranged on the moving frame, the clamping block is fixedly arranged on the rotating shaft, when the external acting force is not applied, the height of one end of the clamping block is greater than that of the moving frame,
the material containing trolley is arranged on the first guide rail, a groove is formed in the bottom of the material containing trolley, one end of the first clamping block is clamped in the groove,
and the power mechanism drives the movable frame to move on the second guide rail.
Further, the trailing mechanism still includes even piece and connecting rod, even the fixed setting of piece is in the one end of pivot, the one end of connecting rod with even the piece is connected, the removal is put up and is fixed to be provided with the dog, the dog is used for the restriction the turned angle of connecting rod.
Furthermore, an opening is formed in the fixture block, a first bolt is vertically arranged at one end of the connecting rod, and the first bolt is clamped in the opening and locked through a nut.
Furthermore, two guide rails are arranged, a plurality of first rollers are arranged on two sides of the moving frame, the rollers roll on the two guide rails respectively, protruding edges are arranged on the two guide rails along the length direction, grooves are formed in the side faces of the first rollers along the circumferential direction, and the protruding edges are arranged in the grooves.
Further, the guide rail II comprises a bottom plate, side plates and a top plate which are sequentially connected, and the convex edges are arranged on the bottom plate.
Furthermore, a plurality of second bolts are arranged on the side wall of the guide rail in the length direction, a plurality of mounting holes are formed in the side plate in the length direction, and the second bolts penetrate through the mounting holes and are locked through nuts.
Furthermore, the material containing trolley comprises a base plate and a baffle plate, the baffle plate surrounds the periphery of the base plate to form a cavity with an upward opening, the groove is located at the bottom of the base plate, two sides of the base plate are further provided with two rollers, and the two rollers slide along the first guide rail.
The utility model discloses a theory of operation and beneficial effect do:
1. as shown in figures 1-3, a plurality of material containing trolleys are placed at the outlet of the stirring machine along a first guide rail, the material containing trolleys are conveyed to the cutting machine by the movable frame in the right-left direction, after the material containing trolleys are filled with slurry, the movable frame moves towards one side of the material containing trolleys along the guide rail, one end, protruding out of each fixture block, of each fixture block is blocked by the bottom of the material containing trolleys, the rotary shaft is rotated, the fixture blocks are driven by the rotary shaft to rotate in the anticlockwise direction, the height of the fixture blocks is gradually reduced, the movable frame continues to move to the bottom of the material containing trolleys, when the fixture blocks move to the groove positions of the bottom of the material containing trolleys, due to the fact that no external acting force is applied, the fixture blocks return to the natural state, the fixture blocks are clamped in the grooves, connection between the movable frame and.
As shown in fig. 4-5, after the moving frame drives the material containing trolley to reach the cutting machine, the moving frame moves rightwards along the second guide rail, the protruding end of the fixture block is blocked by the bottom of the material containing trolley, so that the rotating shaft rotates, the rotating shaft drives the fixture block to rotate anticlockwise, the height of the fixture block is gradually reduced, the moving frame continues to move rightwards until the protruding end of the fixture block is lower than the height of the moving frame, the fixture block is disengaged from the groove, the moving frame continues to move rightwards, and the moving frame is separated from the material containing trolley. The movable frame moves towards the mixer to carry out the next feeding.
The clamping block can be made into a shape with one large end and one small end, so that after the clamping block is fixed on the rotating shaft, under the action of gravity, the heavy end of the clamping block rotates downwards, the light end of the clamping block rotates upwards, the clamping block drives the rotating shaft to rotate, and the height of one end of the clamping block is larger than that of the other end when the clamping block is not acted by external force.
The utility model discloses realize the autoloading of thick liquids from mixer to cutting machine, be favorable to using manpower sparingly, reduce artifical intensity of labour.
2. As shown in figure 3, when the movable frame drives the material containing trolley to move leftwards, the material containing trolley has a rightwards acting force on the convex end of the clamping block, if the acting force of the material containing trolley on the convex end of the clamping block is too large, the rotating shaft can be caused to rotate clockwise, so that the clamping block is disengaged from the groove, and the movable frame and the material containing trolley can not be connected. The utility model discloses in set up even piece in the one end of pivot to connect the connecting rod through even piece, when the pivot rotated, the one end of connecting rod can rotate thereupon like this, and at the rotation in-process, the one end of connecting rod received blockking of dog, and the motion of connecting rod receives the restriction, and the connecting rod can not continue to rotate, thereby avoids the pivot to continue to rotate, guarantees the reliable cooperation of fixture block and recess.
3. The utility model discloses in establish in the opening of even piece through blocking a bolt, realize the connecting rod and even the dismantlement of piece and connect simple structure, be convenient for installation and dismantlement.
4. The utility model discloses be rolling contact between well gyro wheel one and the guide rail two, be favorable to reducing the frictional force of moving the frame in the removal process, further reduce the part wearing and tearing, be favorable to the extension the utility model discloses a life. A side of the roller is provided with a groove, and in the rolling process of the roller, the bead card is clamped into the groove, so that the roller is limited to move, the roller is prevented from being separated from the guide rail in the rolling process, and the reliability is further improved.
5. The utility model discloses the setting of two upper side plates of well guide rail and roof plays fine effect of sheltering from, avoids gyro wheel one to cause unexpected injury to operating personnel at the roll in-process.
6. The utility model discloses in realize through two of a plurality of bolts that two guide rails are fixed on guide rail one, simple structure, connection are reliable.
7. The top end of the medium material containing trolley of the utility model is provided with an opening, which is convenient for containing slurry, and the baffle plate encloses a space with an upward opening along the periphery of the base plate, thereby avoiding leakage during slurry transportation; when flourishing material dolly removed along with removing the frame, gyro wheel two slided on guide rail one, was favorable to reducing the frictional force of flourishing material dolly at the removal in-process, further reduces the part wearing and tearing to be favorable to prolonging the utility model discloses a life.
Drawings
The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.
FIG. 1 is a schematic view of the overall structure of the present invention;
FIG. 2 is a schematic view of the connection process between the moving frame and the material containing trolley;
FIG. 3 is a schematic view showing the connection state of the moving frame and the material containing trolley;
FIG. 4 is a schematic view of the process of disengaging the moving rack and the material containing trolley;
FIG. 5 is a schematic view showing the state that the moving frame and the material containing trolley are disengaged;
fig. 6 is a schematic top view of the present invention;
FIG. 7 is a schematic top view of the movable frame of the present invention;
FIG. 8 is a schematic structural view of a second middle rail of the present invention;
in the figure: 1-first guide rail, 2-second guide rail, 21-bottom plate, 211-convex rib, 22-side plate, 221-mounting hole, 23-top plate, 3-moving frame, 31-stop block, 32-first roller, 4-dragging mechanism, 41-clamping block, 42-rotating shaft, 43-connecting block, 44-connecting rod, 45-first bolt, 5-material containing trolley, 51-base plate, 511-groove, 52-baffle, 6-second bolt, 7-stirrer and 8-cutting machine.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely below with reference to 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 efforts belong to the protection scope of the present invention.
As shown in fig. 1-8, comprises
The guide rail I1 is fixedly arranged between the stirrer 7 and the cutting machine 8,
a second guide rail 2 which is arranged at one side of the first guide rail 1 and is parallel to the first guide rail 1,
the moving frame 3 is movably arranged on the second guide rail 2,
the towing mechanism 4 comprises a fixture block 41 and a rotating shaft 42, both ends of the rotating shaft 42 are rotatably arranged on the moving frame 3, the fixture block 41 is fixedly arranged on the rotating shaft 42, when the external acting force is not applied, the height of one end of the fixture block 41 is larger than that of the moving frame 3,
the material containing trolley 5 is arranged on the guide rail I1, the bottom of the material containing trolley 5 is provided with a groove 511, one end of the fixture block 41I is used for being clamped in the groove 511,
and the power mechanism drives the moving frame 3 to move on the second guide rail 2.
As shown in fig. 1-3, a plurality of material containing trolleys 5 are placed at the outlet of the mixer 7 along the guide rail 1, the moving frame 3 transports the material containing trolleys 5 to the cutting machine 8 from the right to the left, when the material containing trolleys 5 are filled with slurry, the moving frame 3 moves to one side of the material containing trolleys 5 along the guide rail two 2, the protruding end of the fixture block 41 is blocked by the bottom of the material containing trolleys 5, so that the rotating shaft 42 rotates, the rotating shaft 42 drives the fixture block 41 to rotate along the counterclockwise direction, the height of the fixture block 41 is gradually reduced, the moving frame 3 continues to move to the bottom of the material containing trolleys 5, when the fixture block 41 moves to the position of the groove 511 at the bottom of the material containing trolleys 5, the fixture block 41 returns to the natural state due to no limitation of external acting force, the fixture block 41 is clamped in the groove 511, so as to realize the connection between the moving frame 3 and the material, and (5) conveying the material containing trolley 5 to a cutting machine 8.
As shown in fig. 4-5, after the moving frame 3 drives the material containing trolley 5 to reach the cutting machine 8, the moving frame 3 moves rightward along the second guide rail 2, the protruding end of the fixture block 41 is blocked by the bottom of the material containing trolley 5, so that the rotating shaft 42 rotates, the rotating shaft 42 drives the fixture block 41 to rotate counterclockwise, the height of the fixture block 41 is gradually reduced, the moving frame 3 continues to move rightward until the protruding end of the fixture block 41 is lower than the height of the moving frame 3, the fixture block 41 is disengaged from the groove 511, the moving frame 3 continues to move rightward, and the moving frame 3 is separated from the material containing trolley 5. The moving frame 3 moves toward the mixer 7 to perform the next feeding.
The fixture block 41 can be made into a shape with a large end and a small end, so that after the fixture block 41 is fixed on the rotating shaft 42, under the action of gravity, the heavy end of the fixture block 41 rotates downward, the light end of the fixture block 41 rotates upward, the fixture block 41 drives the rotating shaft 42 to rotate, and when the fixture block 41 is not influenced by external force, the height of one end of the fixture block 41 is larger than that of the other end.
The utility model discloses realize the thick liquids from mixer 7 to the autoloading of cutting machine 8, be favorable to using manpower sparingly, reduce artifical intensity of labour.
Further, the towing mechanism 4 further includes a connecting block 43 and a connecting rod 44, the connecting block 43 is fixedly disposed at one end of the rotating shaft 42, one end of the connecting rod 44 is connected with the connecting block 43, the moving frame 3 is fixedly disposed with a stopper 31, and the stopper 31 is used for limiting a rotation angle of the connecting rod 44.
As shown in fig. 3, when the moving frame 3 drives the material containing trolley 5 to move leftwards, the material containing trolley 5 has a rightward acting force on the protruding end of the clamping block 41, and if the acting force of the material containing trolley 5 on the protruding end of the clamping block 41 is too large, the rotating shaft 42 can rotate clockwise, so that the clamping block 41 is disengaged from the groove 511, and the moving frame 3 and the material containing trolley 5 cannot be connected. The utility model discloses in set up even piece 43 in the one end of pivot 42 to connect connecting rod 44 through even piece 43, when pivot 42 rotated like this, connecting rod 44's one end can rotate thereupon, and at the rotation in-process, connecting rod 44's one end received blockking of dog 31, and connecting rod 44's motion receives the restriction, and connecting rod 44 can not continue to rotate, thereby avoids pivot 42 to continue to rotate, guarantees fixture block 41 and recess 511's reliable cooperation.
Further, an opening portion is formed in the fixture block 41, a first bolt 45 is vertically arranged at one end of the connecting rod 44, and the first bolt 45 is clamped in the opening portion and locked by a nut.
The utility model discloses in establish in the opening of even piece 43 through with a 45 clamps of bolt, realize connecting rod 44 and the dismantlement of even piece 43 and connect, simple structure, be convenient for installation and dismantlement.
Furthermore, the number of the two guide rails 2 is two, the two sides of the moving frame 3 are respectively provided with a plurality of rollers 32, the rollers 32 roll on the two guide rails 2 respectively, the protruding edges 211 are arranged on the guide rails 2 along the length direction, the side faces of the rollers 32 are circumferentially provided with grooves, and the protruding edges 211 are arranged in the grooves.
The utility model discloses be rolling contact between well gyro wheel 32 and the guide rail two 2, be favorable to reducing and remove the frictional force of frame 3 at the removal in-process, further reduce the part wearing and tearing, be favorable to the extension the utility model discloses a life. A32 side of gyro wheel is opened there is the slot, and at a 32 rolling in-process of gyro wheel, in the slot was gone into to bead 211 card, played the limited effect to a 32 removal of gyro wheel, avoided a 32 at the roll in-process to break away from the guide rail, further improved the utility model discloses a reliability.
Further, the second guide rail 2 comprises a bottom plate 21, a side plate 22 and a top plate 23 which are connected in sequence, and the protruding ribs 211 are arranged on the bottom plate 21.
The utility model discloses the setting of side panel 22 and roof 23 on two 2 of well guide rail plays fine effect of sheltering from, avoids a gyro wheel 32 to cause unexpected injury to operating personnel at the roll in-process.
Further, a plurality of bolts II 6 are arranged on the side wall of the guide rail I1 along the length direction, a plurality of mounting holes 221 are formed in the side plate 22 along the length direction, and the bolts II 6 penetrate through the mounting holes 221 and are locked through nuts.
The utility model discloses in realize through two 6 fixing of a plurality of bolts of guide rail two 2 on guide rail 1, simple structure, connection are reliable.
Further, the material containing trolley 5 comprises a base plate 51 and a baffle plate 52, the baffle plate 52 surrounds the periphery of the base plate 51 to form a cavity with an upward opening, the groove 511 is located at the bottom of the base plate 51, two sides of the base plate 51 are also provided with second rollers, and the second rollers slide along the first guide rail 1.
The top end of the material containing trolley 5 of the utility model is opened, which is convenient for containing the slurry, the baffle plate 52 encloses a space with an upward opening along the periphery of the base plate 51, and the leakage during the slurry transportation is avoided; when flourishing material dolly 5 removed along with removing frame 3, gyro wheel two slided on guide rail 1, was favorable to reducing the frictional force of flourishing material dolly 5 at the removal in-process, further reduces the part wearing and tearing to be favorable to the extension the utility model discloses a life.
The above description is only a preferred embodiment of the present invention, and should not be taken as limiting the invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (7)

1. With transport vechicle automatic pushing mechanism before soil conditioner thick liquids are cut for send thick liquids to cutting machine (8) from mixer (7), its characterized in that: comprises that
A first guide rail (1) which is fixedly arranged between the stirrer (7) and the cutting machine (8),
a second guide rail (2) which is arranged on one side of the first guide rail (1) and is parallel to the first guide rail (1),
a moving frame (3) movably arranged on the second guide rail (2),
the towing mechanism (4) comprises a clamping block (41) and a rotating shaft (42), two ends of the rotating shaft (42) are rotatably arranged on the movable frame (3), the clamping block (41) is fixedly arranged on the rotating shaft (42), when external acting force is not applied, the height of one end of the clamping block (41) is larger than that of the movable frame (3),
the material containing trolley (5) is arranged on the first guide rail (1), a groove (511) is formed in the bottom of the material containing trolley (5), one end of the first clamping block (41) is clamped in the groove (511),
and the power mechanism drives the moving frame (3) to move on the second guide rail (2).
2. The automatic cart mechanism of a transport cart for soil conditioner slurry prior to cutting of claim 1, wherein: the towing mechanism (4) further comprises a connecting block (43) and a connecting rod (44), the connecting block (43) is fixedly arranged at one end of the rotating shaft (42), one end of the connecting rod (44) is connected with the connecting block (43), a stop block (31) is fixedly arranged on the moving frame (3), and the stop block (31) is used for limiting the rotating angle of the connecting rod (44).
3. The automatic cart mechanism of a transport cart for soil conditioner slurry prior to cutting of claim 2, wherein: an opening part is formed in the clamping block (41), a first bolt (45) is vertically arranged at one end of the connecting rod (44), and the first bolt (45) is clamped in the opening part and locked through a nut.
4. The automatic cart mechanism of a transport cart for soil conditioner slurry prior to cutting of claim 1, wherein: the two guide rails (2) are two, a plurality of roller I (32) are arranged on two sides of the moving frame (3), the roller I (32) rolls on the two guide rails (2) respectively, a rib (211) is arranged on the two guide rails (2) along the length direction, a groove is formed in the side face of the roller I (32) along the circumferential direction, and the rib (211) is arranged in the groove.
5. The automatic cart mechanism of claim 4 for a transport vehicle prior to cutting of soil conditioner slurry, wherein: the second guide rail (2) comprises a bottom plate (21), a side plate (22) and a top plate (23) which are sequentially connected, and the convex ribs (211) are arranged on the bottom plate (21).
6. The automatic cart mechanism of a transport cart for soil conditioner slurry prior to cutting of claim 5, wherein: a plurality of second bolts (6) are arranged on the side wall of the first guide rail (1) along the length direction, a plurality of mounting holes (221) are formed in the side plate (22) along the length direction, and the second bolts (6) penetrate through the mounting holes (221) and are locked through nuts.
7. The automatic cart mechanism of a transport cart for soil conditioner slurry prior to cutting of claim 1, wherein: the material containing trolley (5) comprises a base plate (51) and a baffle (52), wherein the baffle (52) surrounds the base plate (51) to form a cavity with an upward opening, the groove (511) is located at the bottom of the base plate (51), two sides of the base plate (51) are further provided with second rollers, and the second rollers slide along the first guide rail (1).
CN201921770112.XU 2019-10-21 2019-10-21 Automatic trolley mechanism of transport vehicle used before cutting soil conditioner slurry Active CN210994205U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201921770112.XU CN210994205U (en) 2019-10-21 2019-10-21 Automatic trolley mechanism of transport vehicle used before cutting soil conditioner slurry

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201921770112.XU CN210994205U (en) 2019-10-21 2019-10-21 Automatic trolley mechanism of transport vehicle used before cutting soil conditioner slurry

Publications (1)

Publication Number Publication Date
CN210994205U true CN210994205U (en) 2020-07-14

Family

ID=71497731

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201921770112.XU Active CN210994205U (en) 2019-10-21 2019-10-21 Automatic trolley mechanism of transport vehicle used before cutting soil conditioner slurry

Country Status (1)

Country Link
CN (1) CN210994205U (en)

Similar Documents

Publication Publication Date Title
CN110293619B (en) Production line is used in preparation of environment-friendly foam brick processing
CN210994205U (en) Automatic trolley mechanism of transport vehicle used before cutting soil conditioner slurry
CN114870940A (en) Pulverized coal processing is with grinding screening plant
CN204799170U (en) Agitating unit of insulating material production with material circulation
CN213388434U (en) Compound fertilizer kneading, mixing and granulating integrated machine using sludge cakes as main materials
CN110201973B (en) Waste liquid collecting and conveying device suitable for landfill leachate coupling purification
CN211586931U (en) Automatic change iron fillings processing apparatus
CN112050057A (en) Mobile wireless video engineering supervision system
CN211392816U (en) Soil conditioner thick liquids are with conveying system before evaporating foster
CN211392792U (en) Transportation track for soil conditioner slurry before steam curing
CN108384951B (en) A kind of separation of high-efficient energy-saving environment friendly aluminium ash and recyclable device
CN112194543A (en) Compound fertilizer kneading, mixing and granulating integrated machine using sludge cakes as main materials
CN210709430U (en) Efficient biological particle conveying device
CN214554343U (en) Improved coal feeder
CN218361610U (en) Automatic waste material frock of leading
CN212075353U (en) Sludge drying machine transmission band with guide structure
CN218507202U (en) Feeding device for cutting machine
CN214320399U (en) Waste recovery processing device for construction
CN216631468U (en) A novel magnet separator for ore is selected separately
CN216063482U (en) Concrete crushing and recycling equipment
CN213376818U (en) High-efficient broken processing apparatus of construction waste material
CN213770656U (en) Waste recovery device for automatic shearing production line of angle steel
CN214347885U (en) Sand conveying belt with filtering device
CN217410867U (en) Material crushing device
CN219384974U (en) Sludge dewatering device for water supply and drainage

Legal Events

Date Code Title Description
GR01 Patent grant
GR01 Patent grant