Background technology
Screw feeding machine in existing industry is also called machine for arranging screws, that a kind of scattered screw dropping into hopper is simply arranged in a row, make screw can be quicker, sent accurately and got, with a kind of small automatic equipment of increasing work efficiency, be widely used in the industry that electronics and electrical equipment etc. need to tighten up a screw, be used widely in enterprise much relevant to electronic equipment at home at present.
Full automatic screw supplying machine operation principle in current industry mainly can be divided into three kinds: Vibration disc type, ravine slot type, drum-type.Be exactly briefly that scattered screw is dropped into screw hopper, then by three kinds of different feeding styles, in good order for screw is aligned on track, and along orbit transports to discharging opening, then enter feeding distribution mechanism and carry out sub-material, screw puts in place and namely stops, be convenient to the absorption of electric screwdriver head, squeeze into corresponding screw hole position.
Vibrating disk type screw feeding machine utilizes the vibration of the dish that shakes to make the screw at random in hopper increase along helical orbit, and the vibration of rocking by a series of track in the process risen is screened and attitudes vibration screw, become by unordered arranging screws unified orderly state alignment on feeding track.
Ravine slot type screw feeding machine, by the stirring up and down of hopper, makes screw automatically fall in orbit, and then utilize the brush above guide rail by the unordered screw cleaning falling into track, the screw of remaining neat unified arrangement is sent to discharging opening along guide rail.
Drum-type screw feeding machine is then make the screw in hopper along with the rotation of cylinder, goes to the top of feeding track, then falls into the feeding style of track.Unordered screw is screened out by hairbrush by the screw falling into slide rail, and what the arranging screws making to fall into track was neat is sent to discharging opening one by one.
The screw feeding machine of above three kinds of principles is all utilize slide rail that screw is delivered to discharging opening, all there are certain requirements like this to the draw ratio of screw and the thickness of nut.If screw is too tiny, draw ratio is too small, and this feeding style will also exist following deficiency:
One is because precision screw is undersized, adds that draw ratio is also too small, and the direction equipment of nut and screw rod is difficult to identify;
Two is the vibrations owing to producing when the vibration of machine self adds and tightens up a screw and drop track, for too tiny precision screw, very easily produces screw thread wearing and tearing in feeder process;
Three is because the nut of precision screw is too thin, easily produces the phenomenon got stuck in orbit because screw mutually superposes, thus causes course of conveying to interrupt, and then need to carry out plant maintenance, cause operating efficiency to reduce, and production cost increases.
Summary of the invention
In view of this, a kind of compact conformation, easy and simple to handle, substantially non-maintaining automatic screw feeder are provided.
A kind of automatic screw feeder, it screw arrangement apparatus comprising screw hopper and be installed in screw feed hopper bottom, described screw arrangement apparatus comprises the driving mechanism of rotating disk, vacuum generator and driving dial rotation, the periphery edge of described rotating disk has the conical surface, the conical surface of described rotating disk is provided with multiple fluting and multiple material-distributing hole running through rotating disk, each material-distributing hole is slotted with at least one and is communicated with, each fluting extends along the circumferencial direction of rotating disk, described vacuum generator has air entry, and the air entry of described vacuum generator is in the position relative with material-distributing hole.
Further, described rotating disk is in the horizontal direction in skewed, described screw arrangement apparatus has screwdriver feeding position and material stock position, and described screwdriver feeding position is in or close to the highest order of the disk edge conical surface, and described material stock position is in or close to the lowest order of the disk edge conical surface.
Further, the tapered portion of described rotating disk at screwdriver feeding position place in horizontal direction.
Further, the air entry of described vacuum generator is in the position relative with the material-distributing hole at material stock position place.
Further, the groove width of described fluting is less than the diameter of screw screw mandrel, and the groove depth of described fluting is less than the screw mandrel length of described screw, and the size of described material-distributing hole is greater than groove width and is less than the nut size of described screw.
Further, described automatic screw feeder also comprises detection system, described detection system at least has the first detecting position and the second detecting position, each detecting position is provided with a detection probe, described first detecting position is corresponding to the material-distributing hole entered before screwdriver feeding position, for detecting the state of material-distributing hole internal thread, described second detecting position is relative with screwdriver feeding position, for detecting the state of screw state on screwdriver feeding position and electric screw driver.
Further, described automatic screw feeder also comprises indication mechanism, described indication mechanism comprises at least two indicator lamps and feedback circuit, described feedback circuit is connected with described detection system and receives the signal from each detecting position detects, wherein two indicator lamps indicate the state that puts in place of the normotopia state of material-distributing hole internal thread and electric screw driver respectively.
Further, described automatic screw feeder also comprises and does not suck screw cleaning structure and blowning installation, described residue screw removes before structure is positioned at the first detecting position, for cleaning out the screw not entering material-distributing hole, it is air knife or hairbrush that described residue screw removes structure, described blowning installation has inflatable mouth, and described inflatable mouth is positioned at below the material-distributing hole after the second detecting position, for the screw in material-distributing hole is blown out position, hole.
Further, be provided with ledge structure at the lateral edges of each material-distributing hole, described ledge structure comprises the boss being positioned at conical surface edge, enters material-distributing hole in order to the screw stirring material stock position.
Further, described screw hopper is provided with screwdriver feeding guide rail above screwdriver feeding position, and described screwdriver feeding guide rail is added is provided with feeding cylinder, and described screwdriver feeding guide rail has to the gathering sill of electric screw driver guiding.
Above-mentioned automatic screw feeder mainly adopts the material-distributing hole of the edge conical surface of rotating disk to carry out feeding, and under pull of vacuum effect, screw is directly inhaled into material-distributing hole, because fluting communicates with material-distributing hole, strong vacuum power can be avoided oppositely to hold screw.Like this, even the precision screw that draw ratio is too little also can be suitable for, solve conventional screw supplying machine for following on the too little precision screw None-identified of draw ratio, and easily there is the phenomenon that screw thread damages in precision screw, also have the three large problems that screw gets stuck in feeding process.Further, automatic screw feeder structure is more simply compact, easy to operate, substantially non-maintaining, substantially increases the operating efficiency of precision screw feed, reduces production cost.
Detailed description of the invention
Below with reference to specific embodiments and the drawings, the present invention is described in detail.
Refer to Fig. 1 to Fig. 5, the automatic screw feeder 100 of the display embodiment of the present invention, it screw arrangement apparatus comprising screw hopper 10 and be installed in bottom screw hopper 10, screw arrangement apparatus comprises rotating disk 20, vacuum generator 30 and the driving mechanism driving rotating disk 20 to rotate, the periphery edge of described rotating disk 20 has the conical surface 21, the conical surface 21 of described rotating disk 20 is provided with multiple fluting 22 and multiple material-distributing hole 23 running through rotating disk 20, each material-distributing hole 23 is slotted with at least one and 22 to be communicated with, preferably, each fluting 22 extends along the circumferencial direction of rotating disk 20, certainly, also can be radial extension, vacuum generator 30 has air entry 31, the air entry 31 of vacuum generator 30 is in the position relative with material-distributing hole 23.
Particularly, automatic screw feeder 100 has shell, and shell comprises fore shell 101, upper cover 102, side shell 103, back cover 104, drain pan 105.Upper cover 102 offers a screw charging aperture 106, for dropping into screw.Fore shell 101 has a viewing window 101a, for exposing the screwdriver feeding position 201 of rotating disk 20.
Further, automatic screw feeder 100 also comprises detection system, detection system at least has the first detecting position and the second detecting position, first detecting position is corresponding to the material-distributing hole 23 entered before screwdriver feeding position 201, for detecting the state of material-distributing hole 23 internal thread, second detecting position is relative with screwdriver feeding position 201, for detecting the state of state and the electric screw driver (or claiming electric screwdriver head) of tightening up a screw screwdriver feeding position 201.Each detecting position is provided with a detection probe, and the present embodiment adopts fiber laser arrays mode, such as, is respectively equipped with the first fibre-optical probe 51 and the second fibre-optical probe 52 at two detecting positions.
Automatic screw feeder 100 also comprises indication mechanism, and indication mechanism comprises at least two indicator lamps 61,62 and feedback circuit, and feedback circuit is connected with detection system and receives the signal from each detecting position detects.Wherein two indicator lamps 61,62 indicate the normotopia state of material-distributing hole 23 internal thread and the state that puts in place of electric screw driver respectively.Two indicator lamps 61 and 62 protrude from upper cover 102, are convenient to observation signal, to carry out corresponding operating.
Whether, when material-distributing hole 23 turns is to the first detecting position, whether the first fibre-optical probe 51 detects in material-distributing hole 23 material (i.e. screw), and detect further following position on screw and arrange correctly, screw whether normotopia.First fibre-optical probe 51 will filter out emptying aperture and by the screw of suck-back hand-hole position, can not provide signal to indication mechanism at both of these case, indicator lamp does not work, and just can provide signal to indication mechanism when only having material-distributing hole 23 internal thread to arrange correct.When material-distributing hole 23 internal thread is inhaled correctly, provide signal after the first fibre-optical probe 51 detects, go to screwdriver feeding position 201, and suspend rotation, now indicator lamp (green) lights, and prompting operator, can get screw.As material-distributing hole 23 is inhaled into downwards without screw or nut head, now indicator lamp is in OFF state, and rotating disk 20 is rotated further, until the first fibre-optical probe 51 detects that material-distributing hole 23 has screw to be inhaled correctly and just can again light, waits for operator's operation.Whether the second fibre-optical probe 52 has abnormality for detecting screwdriver feeding position 201 screw and whether has electric screw driver, first when detection screw is inhaled correctly, namely rotating disk 20 stops operating, electric screw driver detected simultaneously, screw is got again by electric screw driver, when detecting that getting screw action completes, when electric screwdriver head takes out, rotating disk 20 just can be rotated further.
As shown in Figure 2, rotating disk 20 in the horizontal direction in skewed, namely rotating disk 20 plane and horizontal plane angled so that screw more easily enters material-distributing hole 23.Screw arrangement apparatus has screwdriver feeding position 201 and material stock position 202, and screwdriver feeding position 201 is in or close to the highest order of the rotating disk 20 edge conical surface 21, and material stock position 202 is in or close to the lowest order of the rotating disk 20 edge conical surface 21.Preferably, the present embodiment, screwdriver feeding position 201 is in the peak of the rotating disk 20 edge conical surface 21, and material stock position 202 is in the lowest part of the rotating disk 20 edge conical surface 21, i.e. low-lying position, so that namely the screw entering hopper 10 slips in material stock position 202.
The conical surface 21 part of rotating disk 20 at screwdriver feeding position 201 place in horizontal direction, that is, the material-distributing hole 23 at screwdriver feeding position 201 place be vertically to, namely the hole axle of material-distributing hole 23 is herein vertical direction.Like this, when the screw normotopia in material-distributing hole 23 and when forwarding screwdriver feeding position 201 to, screw is in nut upper vertical vertical, so that screw taken away by electric screw driver.
As shown in Figure 2, screw hopper 10 has side plate washer 15, preferably, at the side shield 15 at material stock position 202 place, there is certain altitude, such as at least with the peak level of the rotating disk 20 edge conical surface 21, the height of side plate washer 15 reduces successively from material stock position 202 to screwdriver feeding position 201, mainly can load screw.Screw hopper 10 is installed on installing plate 110, and installing plate 110 is also heeling condition in horizontal direction.As shown in Figure 4, screw hopper 10 is provided with screwdriver feeding guide rail 13 above screwdriver feeding position 201, and screwdriver feeding guide rail 13 has to the gathering sill 131 of electric screw driver guiding, and gathering sill 131 is right against the top of the material-distributing hole 23 forwarding feeding position 201 to.Screw hopper 10 has feeding cylinder 14, and feeding cylinder 14 is set up on screwdriver feeding guide rail 13, can move by follows track 13.
Further, automatic screw feeder 100 also comprises and does not suck screw cleaning structure and blowning installation 34.Before not sucking screw cleaning structure being positioned at the first detecting position, for cleaning out the screw not entering material-distributing hole 23, blowning installation 34 has inflatable mouth, and inflatable mouth is positioned at below the material-distributing hole 23 after the second detecting position, for the screw in material-distributing hole 23 is blown out position, hole.In embodiment as shown in Figure 3, not sucking screw cleaning structure is air knife 33, for being blown off by the screw not entering material-distributing hole 23.As shown in Figure 6, not sucking screw cleaning structure is hairbrush 32, will not suck screw brush by rotation or rotating brush 32.The side plate washer 15 of screw hopper 10 corresponds to air knife 33 position and is provided with multiple window 16, the side being right against air knife 33 bottom screw hopper 10 has to leak expects mouth 17, so that the screw that air knife 33 blows off can blow out from window 16 and leakage material mouth 17, be unlikely to block hopper 10.Be provided with striker plate 18 in the position near feeding position 201 further, be strayed into feeding position 201 to avoid screw.Do not suck screw cleaning structure and blowning installation, described residue screw removes before structure is positioned at the first detecting position, for cleaning out the screw not entering material-distributing hole, it is air knife or hairbrush that described residue screw removes structure, described blowning installation has inflatable mouth, described inflatable mouth is positioned at below the material-distributing hole after the second detecting position, for the screw in material-distributing hole is blown out position, hole
As shown in Figure 5, screw hopper 10 has chassis 112, and chassis 112 is installed on installing plate 110, and side plate washer 15 is installed on chassis 112.Chassis 112 corresponds to position, screwdriver feeding position 201 and is provided with inclined-plane 112a, so that handled easily.Chassis 112 also has multiple through hole 113, so that ventilate with air entry 31.Spilt by this through hole 113, do not terminate in the equipment of blocking.Rotating disk 20 is installed on chassis 112, particularly, bottom motor 41, output shaft 44 connects an initiatively runner 42, initiatively runner 42 is connected to a driven runner 43 by belt 45, rotating shaft 25 is provided with bottom chassis 112, rotating shaft 25 is connected with the driven runner 43 of motor 41, and motor 41 can drive rotating disk 20 to rotate thus.Installing plate 110 offers a perforation 118 for running through the driven runner 43 of motor 41.The below coaxial sleeve on chassis 112 is provided with a turntable bearing 26, and turntable bearing 26 is sheathed on the driven runner 43 of motor 41.Vacuum generator 30 is positioned at below installing plate 110, and the air entry 31 of vacuum generator 30 is in the position relative with the material-distributing hole 23 at material stock position 202 place.
As illustrated in Figures 5 and 6, turntable bearing 26 is provided with the grooved rail 116 circumferentially extended.Grooved rail 116 accounts for part-circular periphery direction, and the air entry 31 of vacuum generator 30 through described grooved rail 116, and can move along grooved rail 116, to regulate the position of air entry 31.Turntable bearing 26 is also provided with through hole 117, to pass the inflatable mouth 35 of blowning installation 34.
In addition, the groove width of fluting 22 is less than the diameter of screw screw mandrel, and the groove depth of fluting 22 is less than the screw mandrel length of screw, and the size of material-distributing hole 23 is greater than groove width and is less than the nut size of screw.Such increase screw correctly enters the probability of material-distributing hole 23, and in addition, fluting 22 can also be used for avoiding strong vacuum power oppositely to suck screw.Fluting 22 is preferably extended along whole periphery, and be cannelure state, multiple material-distributing hole 23 is for insert in annular slotted 22 evenly and at intervals, and annular slotted 22 does not preferably run through the form of rotating disk 20.
As shown in Figure 7, this rotating disk 20 is provided with ledge structure at the lateral edges of material-distributing hole 23, and described ledge structure comprises the boss 27 being positioned at the conical surface 21 edge, utilizes boss 27 to stir screw, increases screw attendance rate, makes the screw of material stock position enter material-distributing hole 23 smoothly.
In addition, as shown in FIG. 8 and 9, this rotating disk 20 four aspects that communicate with material-distributing hole 23 are respectively equipped with fluting 22, increase screw and enter probability in material-distributing hole 23.Accepting groove 29 is provided with between material-distributing hole 23, can accommodating screw.Because precision screw is too tiny, also can there is nut head and be squeezed the phenomenon sucking material-distributing hole position 23 downwards.Fluting between material-distributing hole 23 just can be adsorbed when making to only have screw rod to enter aperture downwards, otherwise cannot will adsorb due to the air gap of slotting in 22.
This automatic screw feeder 100 can be applicable to electronics, precision instrument and test industry, as computer, wrist-watch, mobile phone, circuit board, microminiature Mechatronic Systems, instrument etc. need the automatic Composition field of precision screw, can enhance productivity greatly, reduce production cost, improve reliability.The screw of the present embodiment, except general screw, is also applicable to microminiature precision screw such as, the screw that the draw ratio of M0.6 ~ M1.5 is too small.
During concrete operations, screw first enters into hopper 10 by feeding cylinder 14, and slides into region, material stock position 202, and motor 41 drives rotating disk 20 to start to rotate, and screw is under the effect of ledge structure simultaneously, then makes screw enter material-distributing hole 23 by vacuum suction effect.The screw being inhaled into material-distributing hole 23 along with the rotation of rotating disk 20 continue upwards to go to air knife 33 position time, the unnecessary screw not entering material-distributing hole 23 blows off by air knife 33, and rotating disk 20 is rotated further.When first fibre-optical probe 51 detects that material-distributing hole 23 has screw to be inhaled correctly, light indicator lamp, rotating disk 20 is rotated further.When forwarding screwdriver feeding position 201 to, whether the second fibre-optical probe 52 first detects screw has abnormality, when screw is inhaled correctly, namely rotating disk 20 stops operating, detect screwdriver feeding position 201 again and whether have electric screw driver, as electric screw driver detected, namely carry out getting screw action, rotating disk 20 can not be rotated further, when electric screwdriver head takes out, namely detect that getting screw action completes, rotating disk 20 just can be rotated further, forward inflatable mouth 35 position of blowning installation 34 again to, by the screw blowout of not taking out in material-distributing hole 23, forward material stock position 202 again to, again repeat aforesaid operations, and so forth, complete the full-automatic supply in screw ground.
It can thus be appreciated that, above-mentioned automatic screw feeder 100 mainly adopts the material-distributing hole 23 of the edge conical surface 21 of rotating disk 20 to carry out feeding, and under pull of vacuum effect, screw is directly inhaled into material-distributing hole 23,22 to communicate with material-distributing hole 23 owing to slotting, strong vacuum power can be avoided oppositely to hold screw.Like this, even the precision screw that draw ratio is too little also can be suitable for, solve conventional screw supplying machine 100 for following on the too little precision screw None-identified of draw ratio, and easily there is the phenomenon that screw thread damages in precision screw, also have the three large problems that screw gets stuck in feeding process.Further, automatic screw feeder 100 structure is more simply compact, easy to operate, substantially non-maintaining, there will not be the phenomenon that gets stuck, and substantially increases the operating efficiency of precision screw feed, reduces production cost.
It should be noted that; the present invention is not limited to above-mentioned embodiment, and according to creative spirit of the present invention, those skilled in the art can also make other changes; these changes done according to creative spirit of the present invention, all should be included within the present invention's scope required for protection.