CN205989990U - Screw is fed from oiling device certainly - Google Patents

Abstract

This utility model belongs to screw processing technique field, especially relates to a kind of screw and is certainly fed from oiling device.It is parallel to each other and the conveying axis with inclined bottom surface including being arranged on vibrating tray discharge end two, conveying axis one end is connected with vibrating tray discharge end by the first installing rack, the other end is downward-sloping to be stretched out and is connected with vibrating tray by the second installing rack, form the transfer passage of inclination between two conveying axis, the minimum widith of transfer passage is no more than arranged on the annular protrusion external diameter of screw upper end, and screw center of gravity is located at the lower end of annular protrusion, the assembly that oils that can certainly affix rust preventive lubricating oil when screw moves on transfer passage can be worked as being provided with conveying axis.Advantage is compared with prior art：Reasonable in design, high degree of automation, improve transfer efficiency, can certainly oil；Compact conformation, installs facility；Controllability is good, can be suitably used for the product of different size, and easy to adjust, saves the acquisition cost of enterprise.

Description

Screw is fed from oiling device certainly

Technical field

This utility model belongs to screw processing technique field, is related to a kind of conveyer device, especially relates to a kind of screw certainly It is fed from oiling device.

Background technology

Existing screw needs in process to be delivered to processing stations or needs after machining to be delivered to finished product Case, but existing screw, manually make it vertically convey afterwards adding man-hour requirement, artificial conveyance is not only lost time, more serious shadow Ring working (machining) efficiency, even if there being conveying equipment to be also unable to reach the effect of unpowered conveying automatically, and the conveying of existing screw Equipment cannot convey the screw of different size, even if having also adjusting more difficulty, also screw cannot be oiled in conveying, Conveying stability is poor.

For example, Chinese patent literature discloses a kind of screw [application number：201520909993.4], including be made into integration The shank of screw that head of screw is connected with head of screw, described head of screw offers the first groove, offers second recessed in the first groove Groove, described first groove is the first cross recess, and this cross recessed wherein bar groove is in getting through in the radial direction of head of screw Form the first flat recess.

If above-mentioned screw is in processing using artificial blowing conveying, it will have a strong impact on working (machining) efficiency.

Content of the invention

The purpose of this utility model is for the problems referred to above, provides a kind of reasonable in design, high degree of automation, improves defeated Send efficiency, the screw that can certainly oil is fed from oiling device certainly.

For reaching above-mentioned purpose, this utility model employs following technical proposal：This screw is fed from oiling device certainly, It is characterized in that, it is parallel to each other and the conveying axis with inclined bottom surface including being arranged on vibrating tray discharge end two, described is defeated Axle one end is sent to be connected with vibrating tray discharge end by the first installing rack, the other end is downward-sloping to stretch out and pacify by second Shelve and be connected with vibrating tray, form the transfer passage of inclination between two conveying axis, the minimum of described transfer passage is wide Degree is no more than arranged on the annular protrusion external diameter of screw upper end, and screw center of gravity is located at the lower end of annular protrusion, in conveying axis It is provided with and can work as the assembly that oils that can certainly affix rust preventive lubricating oil when screw moves on transfer passage, the described assembly that oils Including being arranged on below transfer passage and the uncovered oil storage box in upper end, described oil storage box inner close to the first installing rack, described Oil storage box outer end on offer can make screw remove oil storage box material-removing structure, in described oil storage box, both sides are respectively provided with and put the oil Sponge, puts the oil at two pieces and forms passage of putting the oil between sponge, the first described installing rack is existed by adjusting the first installing rack In vertical direction, the first governor motion of height is connected with vibrating tray, and the second described installing rack passes through to adjust the second peace The second governor motion shelving height in vertical direction is connected with vibrating tray.

In above-mentioned screw from being fed from oiling device, described oil storage box includes the first half boxes and the second half boxes, institute Below the first half fixed conveying axis wherein of box stated, described the second half boxes are installed in another conveying axis in lower section, Put the oil described in being equipped with described the first half boxes and the second half boxes sponge, described the first half boxes are set in logical in the second half boxes Cross grafting to be connected, and can by adjusting the spacing between the first half boxes and the second half boxes thus changing the width of passage of putting the oil, It is additionally provided with leak-proof arrangement, described leak-proof arrangement includes the leakproof taking the shape of the letter U between described the first half boxes and the second half boxes Sealing ring.

3. screw according to claim 2 from be fed from oiling device it is characterised in that described put the oil sponge from Conveying axis lateral part extends upwardly to be formed above conveying axis and can lubricate conveying axis the extension put the oil in screw top.

In above-mentioned screw from being fed from oiling device, described material-removing structure includes being opened in the first half boxes and second Opening on half box outer end, has step below opening, and two openings piece together de- material mouth and in the first half boxes and the second half The box relative movement time can change de- material mouth size.

Certainly it is fed from oiling device it is characterised in that the width of described passage of putting the oil is slightly less than in above-mentioned screw The width of transfer passage, described de- material mouth width is more than or equal to the width of transfer passage.

Certainly it is fed from oiling device in above-mentioned screw, described transfer passage outer end is provided with can make screw take off downwards From the blanking structure of transfer passage, and blanking structure only allows a screw to pass through every time, and described oil storage box outer end is close to falling Material structure.

Certainly it is fed from oiling device in above-mentioned screw, described blanking structure includes arranging two conveying axis outer ends On inner side and opposite two side channels, described side channel width from top to bottom becomes larger, and described side channel upper end width is big In annular protrusion external diameter.

In above-mentioned screw from being fed from oiling device, being arranged right below of the blanking structure stated departs from conveying when screw Screw can be delivered to one by one the feed mechanism of lower section after passage.

Certainly it is fed from oiling device in above-mentioned screw, it is sliding that the first described governor motion includes vertically disposed first Rail, the first described installing rack sidepiece offers can be with the first chute of the first slide rail cooperation, described the first installing rack energy Enough be vertically moved up or down along the first slide rail, and be installed with the first installing rack at least one for position the first slide rail and the first installing rack The first bolt；The second described governor motion includes vertically disposed second slide rail, described the second installing rack sidepiece Offering can be with the second chute of the second slide rail cooperation, and the second described installing rack can be vertically moved up or down along the second slide rail, and Second installing rack is installed with least one for positioning the second slide rail and the second installing rack the second bolt.

In above-mentioned screw from being fed from oiling device, it is provided between two conveying axis and can adjust spacing thus adjusting The transfer passage width adjusting structure of whole transfer passage width, and the first half boxes and the second half boxes and two conveying axis synchronously move Dynamic, described transfer passage width adjusting structure includes the width adjusting being separately positioned on the first installing rack and the second installing rack Groove, described conveying shaft end is respectively provided with stud, and described stud wears transfer passage width adjusting groove, and in conveying Width adjusting location nut for fixing conveying axis is bolted with the stud that channel width adjusts outside groove, described first All it is arranged with the stud of installing rack and the second installing rack both sides and can work as the first installing rack and the second installing rack vertical height is sent out It is used for during changing filling the profile gasket in gap respectively.

Compared with prior art, the advantage of this screw pay-off is：1st, reasonable in design, high degree of automation, carry High transfer efficiency, can oil certainly.2nd, compact conformation, installs facility.3rd, controllability is good, can be suitably used for the product of different size Product, and easy to adjust, save the acquisition cost of enterprise.

Brief description

Fig. 1 is the structural representation of the supreme line of oils part that this utility model provides.

Fig. 2 is the overlooking the structure diagram of the supreme line of oils part that this utility model provides.

Fig. 3 is the side structure schematic view that this utility model provides.

Fig. 4 is the structural representation that this utility model provides.

Fig. 5 is the structural representation of Fig. 4 midship section A-A.

Fig. 6 is the structural representation of Fig. 4 midship section B-B.

In figure, vibrating tray 1, conveying axis 2, the first installing rack 3, the second installing rack 4, transfer passage 5, screw 6, convex annular Rise the 61, first governor motion 31, the second governor motion 41, the first slide rail 311, the first chute 312, the first bolt 313, the Two slide rails 411, the second chute 412, the second bolt 413, blanking structure 7, transfer passage width adjusting structure 8, width are adjusted Section groove 81, stud 82, width adjusting location nut 83, profile gasket 84, side channel 71, side channel width adjusting structure 72, feeding Mechanism 9, vertical adjusting assembly 91, horizontal adjustment assembly 92, receiving hopper 93, quick feeding pipe 94, slow feed pipe 95, flexibility are slow Rush body 96, buffer structure 961, adjustment seat 911, screw rod 912, adjustment seat nut 913, the first strip through hole 921, receiving hopper spiral shell Bolt 922, baffle plate 721, baffle plate frame 722, the second strip through hole 723, baffle plate bolt 724, the 3rd strip through hole 725, counting Detector 9a, first annular groove 931, first annular step 941, the second cannelure 942, the second ring-shaped step 951, upper line of oils Part 10, oil storage box 101, material-removing structure 102, sponge 103 of putting the oil, passage 104 of putting the oil, the first half box 101a, the second half box 101b, Opening 102a, step 102b, de- material mouth 102c, extension 104, pole 105.

Specific embodiment

As shown in figures 1 to 6, this screw is from being fed from oiling device, mutual including being arranged on vibrating tray 1 discharge end two Parallel and conveying axis 2 with inclined bottom surface, conveying axis 2 one end is connected with vibrating tray 1 discharge end, separately by the first installing rack 3 One end is downward-sloping to be stretched out and is connected with vibrating tray 1 by the second installing rack 4, is formed and incline between two conveying axis 2 Oblique transfer passage 5, the minimum widith of transfer passage 5 is no more than arranged on annular protrusion 61 external diameter of screw 6 upper end, and spiral shell Follow closely the lower end that 6 centers of gravity are located at annular protrusion 61, can oneself being provided with conveying axis 2 to work as when screw 6 moves on transfer passage 5 Affix the assembly 10 that oils of rust preventive lubricating oil, the assembly 10 that oils includes being arranged on transfer passage 5 lower section and the uncovered oil storage in upper end Box 101, oil storage box 101 the inner offers on the first installing rack 3, oil storage box 101 outer end can make screw 6 removal oil storage box 101 material-removing structure 102, in oil storage box 101, both sides are respectively provided with sponge 103 of putting the oil, and put the oil to be formed between sponge 103 at two pieces and smear Oily passage 104, the first installing rack 3 passes through to adjust the first governor motion 31 of the first installing rack 3 height in vertical direction It is connected with vibrating tray 1, the second installing rack 4 passes through to adjust the second regulation of the second installing rack 4 height in vertical direction Mechanism 41 is connected with vibrating tray 1.

Oil storage box 101 includes the first half box 101a and the second half box 101b, the first half box 101a fixed wherein one defeated Send axle 2 lower section fixing by some poles 105 of being axially distributed, the second half box 101b are installed in another conveying axis 2 in lower section Fixed by some poles being axially distributed, be equipped with the first half box 101a and the second half box 101b described in put the oil sponge 103, The first half box 101a are set in the second half box 101b and are connected by grafting, and can be by adjusting the first half box 101a and second Spacing between half box 101b thus changing the width of passage 104 of putting the oil, between the first half box 101a and the second half box 101b also It is provided with leak-proof arrangement, leak-proof arrangement includes the leakproof seal circle taking the shape of the letter U；Put the oil sponge 103 from conveying axis 2 lateral part upwards Extend to conveying axis 2 top and formed and can lubricate conveying axis 2 extension 104 put the oil in screw 6 top.

Material-removing structure 102 includes being opened in the opening 102a on the first half box 101a and the second half box 101b outer ends, is opening There is below mouthful 102a step 102b, two opening 102a piece together de- material mouth 102c and in the first half box 101a and the second half boxes The 101b relative movement time can change de- material mouth 102c size；The width of passage 104 of putting the oil is slightly less than the width of transfer passage 5 Degree, de- material mouth 102c width is more than or equal to the width of transfer passage 5；Transfer passage 5 outer end is provided with can make screw 6 take off downwards From the blanking structure 7 of transfer passage 5, and blanking structure 7 only allows a screw 6 to pass through every time, and oil storage box 101 outer end is close to falling Material structure 7.

Blanking structure 7 includes arranging upper inside two conveying axis 2 outer ends and two opposite side channels 71, and side channel 71 is wide Degree from top to bottom becomes larger, and side channel 71 upper end width is more than annular protrusion 61 external diameter；Being provided with above two side channels 71 can Adjust the side channel specification adjusting part 72 of blanking specification between two side channels 71, described side channel specification adjusting part 72 includes setting Put and be provided with the baffle plate 721 that can adjust blanking specification between two side channels 71 above two side channels 71, side channel specification regulation group Part 72 includes L-shaped baffle plate 721, and baffle plate 721 is arranged in adjustment seat 911 by baffle plate installing rack 722, and baffle plate 721 is opened It is provided with the second strip through hole 723 being capable of controllable register 721 position in conveying axis 2 axial direction, in the second strip through hole 723 It is equipped with the baffle plate bolt 724 for fixed dam 721 and baffle plate installing rack 722, baffle plate installing rack 722 offers and vertically sets The 3rd strip through hole 725 put, receiving hopper bolt 922 is located in the 3rd strip through hole 725 and is fixed on baffle plate installing rack 722 On.

Blanking structure 7 be arranged right below when screw 6 depart from transfer passage 5 after can by screw 6 be delivered to one by one lower section Feed mechanism 9；The receiving hopper 93 that pay-off 9 includes being vertically arranged is located at below two side channels 71, and receiving hopper 93 internal diameter is big Upward, receiving hopper 93 lower end is connected with the quick feeding pipe 94 being vertically arranged for one end, and the lower end of quick feeding pipe 94 is connected with slow Fast feed pipe 95, receiving hopper 93 diameter of bore is from top to bottom gradually reduced, and receiving hopper 93 endoporus lower end diameter is less than or equal to fast Fast feed pipe 94 upper end diameter of bore；It is straight that quick feeding pipe 94 endoporus lower end diameter is less than or equal to slow feed pipe 95 endoporus Footpath, has buffer structure 961 on slow feed pipe 95 endoporus.Buffer structure 961 includes being arranged on slow feed pipe 95 endoporus On some in semi-circular buffer body 96, slow feed pipe 95 is made up of hard prepared material, and buffer body 96 is fabricated from a flexible material； It is equipped with the side wall of quick feeding pipe 94 and slow feed pipe 95 and calculate and monitor the monitor 9a passing through；Receiving hopper 93 splicing Below the blanking structure 7 that mouth is located at.

It is provided with the vertical adjusting that can adjust receiving hopper 93 height in vertical direction between receiving hopper 93 and the second installing rack 4 Assembly 91, is provided with the horizontal adjustment assembly 92 that can adjust receiving hopper 93 horizontal radial position on vertical adjusting assembly 91；Hang down Straight adjusting part 91 includes adjustment seat 911, and the second installing rack 4 bottom is provided with least one vertically disposed screw rod 912, screw rod 912 are located in adjustment seat 911, are respectively equipped with, in adjustment seat 911 upper and lower ends, the adjustment seat nut being screwed onto on screw rod 912 913, horizontal adjustment assembly 92 includes two the first strip through holes 914 parallel to each other, wears in the first strip through hole 921 It is provided with the receiving hopper bolt 922 for being fixed on receiving hopper 93 in adjustment seat 911；Receiving hopper 93 lower end offers first annular Groove 931, has female thread on first annular groove 931 inwall, and quick feeding pipe 94 upper end has first annular step 941, the External screw thread is had on one ring-shaped step 941, first annular step 941 is arranged on interior first annular groove 931 and passes through helicitic texture phase Even, quick feeding pipe 94 lower end offers the second cannelure 942, has female thread, slowly send on the second cannelure 942 inwall Expects pipe 95 upper end has the second ring-shaped step 951, and the second ring-shaped step 951 has external screw thread, and the second ring-shaped step 951 is arranged Pass through helicitic texture in interior second cannelure 942 to be connected.

First governor motion 31 includes vertically disposed first slide rail 311, and the first installing rack 3 sidepiece offers can be with First chute 312 of one slide rail 311 cooperation, the first installing rack 3 can be vertically moved up or down along the first slide rail 311, and in the first installation Be installed with frame 3 at least one for positioning the first slide rail 311 and the first installing rack 3 the first bolt 313；Second regulation Mechanism 41 includes vertically disposed second slide rail 411, and the second installing rack 4 sidepiece offers can be with the second slide rail 411 cooperation Second chute 412, the second installing rack 4 can be vertically moved up or down along the second slide rail 411, and is installed with least one on the second installing rack 4 Root is used for the second bolt 413 of positioning the second slide rail 411 and the second installing rack 4；Being provided between two conveying axis 2 can Adjustment spacing is thus adjust the transfer passage width adjusting structure 8 of transfer passage 5 width, and the first half box 101a and the second half boxes 101b and two conveying axis 2 synchronizing moving, transfer passage width adjusting structure 8 includes being separately positioned on the first installing rack 3 and Width adjusting groove 81 on two installing racks 4, conveying axis 2 end is respectively provided with stud 82, and stud 82 wears transfer passage width and adjusts Section groove 81, and the width for fixing conveying axis 2 is bolted with the stud 82 in transfer passage width adjusting groove 81 outside Adjust location nut 83, the stud 82 of the first installing rack 3 and the second installing rack 4 both sides is all arranged with and can work as the first installing rack 3 and the second installing rack 4 vertical height when changing for filling the profile gasket 84 in gap respectively.

Specific embodiment described herein is only explanation for example to this utility model spirit.This utility model institute Belong to those skilled in the art described specific embodiment can be made with various modifications or supplement or using similar Mode substitute, but without departing from of the present utility model spirit or surmount scope defined in appended claims.

Although more employing vibrating tray 1, conveying axis 2, the first installing rack 3, the second installing rack 4 herein, conveying and lead to Road 5, screw 6, annular protrusion 61, the first governor motion 31, the second governor motion 41, the first slide rail 311, the first chute 312, One bolt 313, the second slide rail 411, the second chute 412, the second bolt 413, blanking structure 7, transfer passage width Adjustment structure 8, width adjusting groove 81, stud 82, width adjusting location nut 83, profile gasket 84, side channel 71, side channel width Adjustment structure 72, feed mechanism 9, vertical adjusting assembly 91, horizontal adjustment assembly 92, receiving hopper 93, quick feeding pipe 94, slow Feed pipe 95, flexible buffer body 96, buffer structure 961, adjustment seat 911, screw rod 912, adjustment seat nut 913, the first strip Through hole 921, receiving hopper bolt 922, baffle plate 721, baffle plate frame 722, the second strip through hole 723, baffle plate bolt the 724, the 3rd are long Strip through-hole 725, count detector 9a, first annular groove 931, first annular step 941, second cannelure the 942, second annular Step 951, the assembly 10 that oils, oil storage box 101, material-removing structure 102, sponge 103 of putting the oil, passage 104 of putting the oil, the first half boxes 101a, the second half box 101b, opening 102a, step 102b, the de- term such as material mouth 102c, extension 104, pole 105, but not Exclusion is using the probability of other terms.Of the present utility model just for the sake of more easily describing and explaining using these terms Essence, it is all contrary with this utility model spirit for being construed as any additional restriction.

Claims (10)

1. a kind of screw is fed from oiling device certainly it is characterised in that including being arranged on vibrating tray (1) discharge end two mutually Parallel and conveying axis (2) with inclined bottom surface, the first installing rack (3) and vibrating tray (1) are passed through in described conveying axis (2) one end Discharge end is connected, and the other end is downward-sloping to be stretched out and be connected with vibrating tray (1) by the second installing rack (4), at two Form the transfer passage (5) of inclination, the minimum widith of described transfer passage (5) is no more than arranged on spiral shell between conveying axis (2) Annular protrusion (61) external diameter of nail (6) upper end, and screw (6) center of gravity is located at the lower end of annular protrusion (61), in conveying axis (2) It is provided with and can work as the assembly that oils (10) that screw (6) can certainly affix rust preventive lubricating oil when transfer passage (5) is upper mobile, described The assembly that oils (10) include being arranged on below transfer passage (5) and the uncovered oil storage box in upper end (101), described oil storage box (101) the inner offers on the first installing rack (3), described oil storage box (101) outer end can make screw (6) removal oil storage box (101) material-removing structure (102), the described interior both sides of oil storage box (101) are respectively provided with sponge of putting the oil (103), in two pieces of seas of putting the oil Form passage (104) of putting the oil, described the first installing rack (3) passes through to adjust the first installing rack (3) vertical between continuous (103) First governor motion (31) of Nogata height upwards is connected with vibrating tray (1), and described the second installing rack (4) passes through to adjust The second governor motion (41) saving the second installing rack (4) height in vertical direction is connected with vibrating tray (1).

2. screw according to claim 1 is fed from oiling device certainly it is characterised in that described oil storage box (101) wraps Include the first half boxes (101a) and the second half boxes (101b), the described the first half fixed conveying axis (2) wherein of box (101a) Lower section, described the second half boxes (101b) are installed in another conveying axis (2) in lower section, described the first half boxes (101a) and Put the oil described in being equipped with 2 half boxes (101b) sponge (103), described the first half boxes (101a) are set in the second half boxes (101b) be connected by grafting in, and can by adjust the spacing between the first half boxes (101a) and the second half boxes (101b) from And change the width of passage (104) of putting the oil, it is additionally provided with leakproof between described the first half boxes (101a) and the second half boxes (101b) Oily structure, described leak-proof arrangement includes the leakproof seal circle taking the shape of the letter U.

3. screw according to claim 2 is from being fed from oiling device it is characterised in that described sponge of putting the oil (103) Extend upwardly to be formed above conveying axis (2) from conveying axis (2) lateral part and can lubricate conveying axis (2) and to screw (6) top The extension put the oil.

4. screw according to claim 3 is from being fed from oiling device it is characterised in that described material-removing structure (102) Including the opening (102a) being opened on the first half boxes (101a) and the second half box (101b) outer ends, have below opening (102a) There is a step (102b), two openings (102a) piece together de- material mouth (102c) and in the first half boxes (101a) and the second half boxes (101b) the relative movement time can change de- material mouth (102c) size.

5. screw according to claim 4 is from being fed from oiling device it is characterised in that described passage of putting the oil (104) Width be slightly less than the width of transfer passage (5), described de- material mouth (102c) width is more than or equal to the width of transfer passage (5) Degree.

6. the screw according to claim 1 or 2 or 3 or 4 is from being fed from oiling device it is characterised in that described conveying Passage (5) outer end is provided with the blanking structure (7) that screw (6) can be made to depart from downwards transfer passage (5), and blanking structure (7) is every Secondary allows a screw (6) to pass through, and described oil storage box (101) outer end is close to blanking structure (7).

7. screw according to claim 6 is fed from oiling device certainly it is characterised in that described blanking structure (7) is wrapped Include upper inside two conveying axis (2) outer ends of setting and two opposite side channels (71), described side channel (71) width is by upper To under become larger, described side channel (71) upper end width is more than annular protrusion (61) external diameter.

8. screw according to claim 6 is from being fed from oiling device it is characterised in that described blanking structure (7) It is arranged right below screw (6) being delivered to one by one the feed mechanism (9) of lower section after screw (6) departs from transfer passage (5).

9. the screw according to claim 1 or 2 or 3 or 4 or 5 is from being fed from oiling device it is characterised in that described the One governor motion (31) includes vertically disposed first slide rail (311), and described the first installing rack (3) sidepiece offers can be with The first chute (312) that first slide rail (311) coordinates, described the first installing rack (3) can rise along the first slide rail (311) is vertical Fall, and be installed with the first installing rack (3) at least one for positioning the first slide rail (311) and the first installing rack (3) first Bolt (313)；Described the second governor motion (41) includes vertically disposed second slide rail (411), described the second peace Shelve (4) sidepiece and offer the second chute (412) that can coordinate with the second slide rail (411), described the second installing rack (4) energy Enough along the second slide rail (411) vertical lift, and be installed with the second installing rack (4) at least one for position the second slide rail (411) second bolt (413) of and the second installing rack (4).

10. the screw according to Claims 2 or 3 or 4 is from being fed from oiling device it is characterised in that in two conveying axis (2) it is provided between and can adjust spacing thus the transfer passage width adjusting structure (8) that adjusts transfer passage (5) width, and Half box (101a) and the second half boxes (101b) and two conveying axis (2) synchronizing movings, described transfer passage width adjusting knot Structure (8) includes the width adjusting groove (81) being separately positioned on the first installing rack (3) and the second installing rack (4), and described is defeated Axle (2) end is sent to be respectively provided with stud (82), described stud (82) wears transfer passage width adjusting groove (81), and in conveying Width adjusting location nut for fixing conveying axis (2) is bolted with the stud (82) outside channel width regulation groove (81) (83) all it is arranged with the stud (82) of, described the first installing rack (3) and the second installing rack (4) both sides and can work as the first installation It is used for when frame (3) and the second installing rack (4) vertical height change filling the profile gasket (84) in gap respectively.