CN102022307B - Pump driving device - Google Patents

Abstract

The invention provides a pump driving device. Currently, a known technology is as follows: a reciprocating driving type pump is installed in a soil disinfection device, while driving by a wobble crank, an adjusting rod linked with a wobbling pivot is operated in sliding, thereby quickly changing an extrusive quantity, but a problem that a pivot position of the wobbling pivot cannot be correctly returned to an original pivot position when returning back to an original extrusive quantity after changing the extrusive quantity is caused. In the pump driving device of the invention, the adjusting rod (44) comprises a first moving body (54) which slides along length direction of the wobble crank (40) and can be locked with a locking body (56)at a multi-stage position, and a second moving body (55) which slides along the first moving body (54) and can be locked with the first moving body (54) at a non-stage position, moreover, a pivot cam (41) is linked with one end of the second moving body (55), and the other end of the second moving body (55) is provided with a rod operating part (57).

Description

Pump drive

Technical field

The present invention relates in the reciprocal driving pumps such as the diaphragm type liquid rear pump for soil disinfection machine, its spray volume can be changed to the pump drive of specified value in the short time, particularly relate to and possess once after changing spray volume, correctly can return the pump drive of the return structure of former spray volume.

Background technique

At present, a kind of structure is known to: the reciprocal driving pumps such as diaphragm type liquid rear pump are installed in the soil disinfection apparatus being installed on tractor or supervisor.The driving of this reciprocal driving pump is known to a kind of technology: one end of wobble crank and both-way movable bodies such as being arranged on connecting rod on barrier film are linked, the other end of eccentric cam and this wobble crank is linked, make this eccentric cam rotary actuation, make described wobble crank March motion of handle thus, and, at the length direction middle part of described wobble crank, swing pivot is set, adjustable lever and this swing pivot are linked, by this adjustable lever of length direction slide along wobble crank, thus promptly move the position of described swing pivot, change the up and down reciprocatingly amplitude of described both-way movable body, spray volume is changed at short notice specified value (such as with reference to patent documentation 1).

According to this technology, when carrying out the confirmation etc. of exhaust or the regular event waited in drug liquid tube during running in before operation, described reciprocal driving pump can be made to change to maximum spout output at short notice, like this, need not repeatedly rotate in order to mobile described swing pivot the bolt shank linked with this swing pivot, the preparation shortening of activity duration or alleviating of worker's load can be realized.In addition, even if when thinking to change suddenly spray volume in operation, when maybe will stop the ejection of only specific reciprocal driving pump, can spray volume be changed at short notice, can not supply by the liquid carried out too insufficiently to soil, the increase of the yielding of crop or the raising of quality can be realized.

Patent documentation 1: Japanese Unexamined Patent Publication 2007-303279 publication

In the above-described techniques, (following by former spray volume, be called " benchmark spray volume ") change to the spray volume of regulation, after completing the operations such as the confirmation waiting exhaust or regular event in drug liquid tube, return benchmark spray volume, utilize dial to read the position of the pointer linked with swing pivot in advance, after having operated before changing at spray volume, slide adjustable lever, returns to this load position to make pointer.

But, even if such as make adjustable lever return to the position of reading, the reading error of the pointer offset caused due to the vibration etc. in operation, the scale on dial or read error etc., and it is (following that the position of the fulcrum of the swing pivot linked with adjustable lever can not be made correctly to return spray volume former position of the fulcrum before changing, be called " benchmark position of the fulcrum "), spray volume produces error, consequently there is this problem of increase of the minimizing of the yielding of the crop causing the inequality of liquid effect to cause or quality reduces and liquid too much causes liquid cost.

Summary of the invention

The problem that the present invention will solve is described above, the following describes the method for solving this problem.

Namely, first aspect present invention provides a kind of pump drive, one end of wobble crank is linked with driving the both-way movable body of reciprocal driving pump, the other end of eccentric cam and this wobble crank is linked, this eccentric cam is driven in rotation, described wobble crank is made to do crank-motion thus, and at the length direction middle part of described wobble crank, swing pivot is set, adjustable lever and this swing pivot are linked, by the length direction slide of this adjustable lever along wobble crank, the position of described swing pivot can be moved rapidly thus, wherein, described adjustable lever possesses: the first moving body, its length direction along described wobble crank slides, and can engage with locking body in multistage position, second moving body, it slides along this first moving body, and can engage with this first moving body without level position, and one end of described swing pivot and this second moving body links, and arranges bar operation unit at the other end of the second moving body.

In second aspect, described first moving body and the second moving body make inside and outside two layers of tubular construction that can mutually be configured at slidably in concentric shafts.

In the third aspect, insert described second moving body in the inside of described first moving body, and, the engaged part that can engage with described locking body is set integratedly in the periphery of the first moving body.

In fourth aspect, the periphery of described first moving body is arranged for estimating the mark with the position engaging the engaged part that body engages.

The present invention is structure as above, the effect shown in below playing.

Namely, in a first aspect, by combination can be multistage be positioned to engage the first moving body of body, infinitely can be positioned the second moving body of this first moving body, the position of the fulcrum of spray volume swing pivot before changing and benchmark position of the fulcrum can be made correctly to correspond to the locking position of the first moving body to the locking of locking body, even if after spray volume changes, as long as pull bar operation unit operates, first moving body is locked on former locking position, just make swing pivot rapidly and correctly return benchmark position of the fulcrum, prevent spray volume before changing after spray volume in produce big error, the inequality of liquid effect can not be produced, realize the increase of the yielding of crop or the raising of quality, and liquid can not be made too much, the reduction of liquid cost can be realized.

In second aspect, described adjustable lever can be made compact structure, the operability of adjustable lever, maintenance can be improved.

In a third aspect, do not need with the first moving body split design engaged part, can number of spare parts be reduced, the reduction of cost of parts and the raising of maintenance can be realized.

In fourth aspect, wait when can not confirm even if engaged part is hidden in card at all, also with the described target that is labeled as, the position of engaged part can be held, reliably the first moving body can be locked to former locking position.

Accompanying drawing explanation

Fig. 1 is the overall plan view representing that the entirety of the tractor having installed soil disinfection machine of the present invention is formed;

Fig. 2 is the stereogram of the liquid injection unit of soil disinfection machine;

Fig. 3 is the side part sectioned view of diaphragm type liquid rear pump;

Fig. 4 is the plane part sectioned view of diaphragm type liquid rear pump;

Fig. 5 is the front partial cut away figure of diaphragm type liquid rear pump;

Fig. 6 is the exploded view of adjustable lever.

Symbol description

28 pump drives

29 diaphragm pumps (reciprocal driving pump)

37 connecting rods (both-way movable body)

40 wobble cranks

41 fulcrum cam (swing pivot)

42 eccentric cams

44 adjustable levers

54 first moving bodys

54c engages recess (engaged part)

54d marks

55 second moving bodys

56 locking bodies

57 bar operation units

Embodiment

First, according to Fig. 1 ~ Fig. 3, the overall structure possessing the soil disinfection machine 1 of pump drive of the present invention, the vehicle installing this soil disinfection machine 1 and tractor 2 is described.In addition, by the direction of advance being set to tractor 2 with the direction that arrow F represents of Fig. 1, each component locations described below or direction etc. with this direction of advance for benchmark.

This tractor 2 is by moving vehicle 2a, form with the assembly department 2b of the back hitch of this moving vehicle 2a, and at the front portion of this moving vehicle 2a and rear portion, suspension has front-wheel 3,3 and trailing wheel 4,4 respectively.

And, in the hood 5 of this moving vehicle 2a front portion, be mounted with motor, storage battery 6 etc., and at this hood 5 rear configuration steering wheel 7, be equipped with the driver's seat 8 that worker takes one's seat at the more rear of this steering wheel 7.Lateral column 9L, 9R of two sides of this driver's seat 8 are equipped the various operation utensil such as main shift lever, PTO speed change lever, are equipped with pin accelerator pedal, left and right brake petal, main clutch pedal etc. in the underfooting in this driver's seat 8 front.

In addition, above-mentioned assembly department 2b consists of, and be made up of top ring 10, pairing left and right bottom ring 11,11 etc., various working machine can link with this top ring 10, bottom ring 11,11 and draw.In addition, the vehicle as above-mentioned soil disinfection machine 1 can be also cultivator etc., and is not limited to this tractor 2.

In addition, above-mentioned soil disinfection machine 1 is made up of the liquid supply unit 1a of supply liquid, the liquid injection unit 1b that injects liquid in soil.And, for liquid injection unit 1b wherein, top ring bar 12,12 is set in front end, the back hitch of the top ring 10 of the upper end of this top ring bar 12,12 and the assembly department 2b of above-mentioned tractor 2, on the other hand, link the front end of fixed bearing bar 13,13 in the lower end of top ring bar 12,12, link the rear end of above-mentioned bottom ring 11,11 at left and right pins 14,14 head lamp brush guard pivot projected outward from the front end of this supporting rod 13,13.

And, can via such top ring 10, bottom ring 11,11, top ring bar 12,12, the liquid injection unit 1b of soil disinfection machine 1 is reliably linked supporting with the assembly department 2b of tractor 2 and draws.

Rectangular-shaped scaffold 15 is seen, rotatable earth's axis supporting seaming roll 16 between the rear portion of arm 15a, 15a of the left and right of this scaffold 15, the soil after roll extrusion liquid injects in the plane being fixedly installed rearward opening below of above-mentioned supporting rod 13,13.

In addition, frame linking portion 15b between the front end being located at above-mentioned arm 15a, 15a at link press span is equipped with multiple liquid every certain intervals and injects pawl 17,17......, inject pawl 17 at this liquid, the back side of 17...... arranges liquid injection nozzle 18,18...... with can setting prescribed depth.

At above-mentioned liquid supply unit 1a, the plane of front openings sees that the rear end of the bearing support 19 of U-shaped is installed in the front portion of above-mentioned moving vehicle 2a, further, above the front portion of this bearing support 19, be installed with liquid medicinal case mounting table 20,20, this liquid medicinal case mounting table 20,20 is placed with liquid medicinal case 21,21.

In addition, on above-mentioned bearing support 19, crossbearer has support plate 22, this support plate 22 is installed with above-mentioned liquid injection nozzle 18,18...... with liquid rear pump 23, the 23...... of quantity.This liquid rear pump 23,23...... in the present embodiment, arrange two left and right pump unit 63L, 63R are each respectively, this pump unit 63L, 63R above-mentioned liquid medicinal case 21,21 dead astern left and right directions and establish.And, between this pump unit 63L, 63R, connection shaft 64 is set, interlock between the live axle 50 of respective liquid rear pump 23 is linked, utilize the motor power from the motor 24a be attached in the motor field frame 24 of left pump unit 63L, four liquid rear pumps 23,23...... can be driven simultaneously.

This liquid rear pump 23,23...... have as reciprocal driving pump diaphragm pump 29 and drive the pump drive 28 of this diaphragm pump 29, this pump drive 28 is driven by above-mentioned live axle 50.In addition, the driving source of this live axle 50 and above-mentioned motor 24a driving, stop the switch 25a being disposed in the motor switch dish 25 of the lateral column 9R of side on the right side of above-mentioned driver's seat 8 by switching manipulation to carry out.In addition, this liquid supply unit 1a also can be configured at the rear portion of tractor 2, and its allocation position does not limit especially.

And, these liquid rear pumps 23,23...... are communicated with via suction pipe 26,26...... with liquid medicinal case 21,21......, and liquid rear pump 23,23...... are communicated with via spraying pipe 27,27...... with above-mentioned liquid injection nozzle 18,18.......In addition, above-mentioned liquid supply unit 1a also can be configured at the rear portion of tractor 2, and its allocation position is not particularly limited.

Below, the structure of Fig. 3 ~ Fig. 5 to pump drive 28 of the present invention is utilized to be described.Wherein, the structure of 4 liquid rear pumps 23 is roughly the same, so be only described the liquid rear pump 23 in left side of the left pump unit 63L setting up motor field frame 24, all the other omit.

Pump drive 28 is arranged in the pump drive shell 30 of above-mentioned liquid rear pump 23, links interlock with the diaphragm pump 29 of reciprocal driving pump on top of the side being arranged at this pump drive shell 30.In addition, as pump, may not be diaphragm type, but plunger type, as long as back and forth driving, be not particularly limited.

In above-mentioned diaphragm pump 29, the barrier film 35 be made up of upper and lower parts 35a, 35b by valve seat member 33 and barrier film assembly 34 from gripping up and down, the suction port 31 be communicated with in barrier film 35 and ejiction opening 32 project upward from valve seat member 33 wherein, and this suction port 31 and ejiction opening 32 are connected with above-mentioned suction pipe 26 and spraying pipe 27 respectively.

On the other hand, to hang down connection pin 36 from the central lower of above-mentioned barrier film 35, both-way movable body and connecting rod 37 link with this connection pin 36, and the bottom of this connecting rod 37 is inserted in said pump drive shell 30.

In addition, in said pump drive unit 28, connecting rod 37 lower end of this diaphragm pump 29 is pivotally supported on the top, one end of wobble crank 40 via pivot fulcrum 39, utilize retainer 38 to prevent from coming off.On this wobble crank 40, offer elongated hole 40a in diaphragm pump 29 side, offer elliptical hole 40b in motor 24a side, insert the fulcrum cam 41 as swing pivot in above-mentioned elongated hole 40a wherein, in above-mentioned elliptical hole 40b, insert eccentric cam 42.

Above-mentioned fulcrum cam 41 is formed as discoid, and middle thereof connection shaft 43, by this connection shaft 43 rotatably pivot suspension.And the right part of this connection shaft 43 is inserted in pilot hole 30a said pump drive shell 30 worn into elongated hole-shape.On the other hand, be formed with large-diameter portion 43a the left part of connection shaft 43 is expanding, at this large-diameter portion 43a, penetrate with the axle center of connection shaft 43 top being fixed with adjustable lever 44 orthogonally, and at the left end of this large-diameter portion 43a, pointer 48 is installed.And, in the pilot hole 30b that this pointer 48 wears with being inserted in the left surface elongated hole-shape of said pump drive shell 30, simultaneously along this pilot hole 30b, be also installed with dial 47 at the left surface of pump drive shell 30, it is provided with the scale 47a of the position for reading above-mentioned pointer 48.In addition, above-mentioned pilot hole 30a, 30b configure in parallel to each other in the left and right of pump drive shell 30, and also configure abreast with above-mentioned adjustable lever 44.

And insert above-mentioned live axle 50 at the axis central part of above-mentioned eccentric cam 42, this live axle 50 utilizes key 51 not link with the relative rotation.In addition, the axle collar 52 is embedded with outside eccentric cam 42, via this axle collar 52, eccentric cam 42 is slidably carry in the elliptical hole 40b of above-mentioned wobble crank 40, and the fixed component 53,53 of ring-type is fitted together in the bi-side of the axle collar 52, thus, above-mentioned eccentric cam 42 and the axle collar 52 are fixed in the mode of not deviating from wobble crank 40.

The left-hand end of the live axle 50 of through eccentric cam 42 from pump drive shell 30 left foreign side give prominence to, be linked with the not shown output shaft of the above-mentioned motor 24a of the left surface being fixedly arranged on pump drive shell 30 at this protruding terminus, motor power from motor 24a can be transmitted to live axle 50.

In such an embodiment, when carrying out slide to the above-mentioned adjustable lever 44 of length direction push-and-pull of wobble crank 40, be fixed on the large-diameter portion 43a of the connection shaft 43 at the top of this adjustable lever 44 by while above-mentioned pilot hole 30a, 30b guiding, length direction promptly along wobble crank 40 slides, meanwhile, the above-mentioned fulcrum cam 41 supported by connection shaft 43 also moves at short notice.

After this fulcrum cam 41 mobile, as the above-mentioned switch 25a drive motor 24a of open operation, above-mentioned live axle 50 is driven in rotation, and eccentric cam 42 rotates.So, the one end of the wobble crank 40 slipped with the periphery of this eccentric cam 42 pumps, the other end of wobble crank 40 also with above-mentioned fulcrum cam 41 for fulcrum pumps, thereupon, the above-mentioned barrier film 35 linked via connecting rod 37 and the other end of wobble crank 40 also pumps.Thus, be arranged on the valve opening and closing in suction port 31 and ejiction opening 32, liquid suction action and spray action alternate repetition carry out.

At this moment, when making the fulcrum cam 41 becoming swing pivot move to eccentric cam 42 side, the up and down reciprocatingly amplitude that can realize pivot fulcrum 39 side increases, the amount of liquid medicine be inhaled in barrier film 35 increases, and spray volume also increases, on the contrary, when making the fulcrum cam 41 becoming swing pivot be separated from eccentric cam 42, the up and down reciprocatingly amplitude that can realize pivot fulcrum 39 side shortens, and the amount of liquid medicine sucked in barrier film 35 reduces, and spray volume also reduces.

Below, to the structure of above-mentioned adjustable lever 44 and the return structure returning benchmark position of the fulcrum, Fig. 3 ~ Fig. 6 is utilized to be described.

Be connected and fixed guide rod 46 in the anterior left comer portion of said pump drive shell 30 by upper and lower bolt 62,62, the middle part of above-mentioned adjustable lever 44 inserted the boss part 46a being embedded in and there is in this guide rod 46 axle center along the longitudinal direction.And this adjustable lever 44 comprises: with the mode connected with above-mentioned boss part 46a carry out the tubulose of interpolation the first moving body 54, in insert in this first moving body 54 and be configured at shaft-like the second moving body 55 in concentric shafts, be arranged on the bar operation unit 57 of the rear end of this second moving body 55.

The inside of the first moving body 54 wherein from after be formed with the most large and long large footpath hole 54a, less than this large footpath hole 54a and short and possess the central diameter tapped hole 54b of screw section occupying the first moving body 54 in order.In addition, the external diameter of the first moving body 54 is roughly formed with footpath with the boss hole 46d of the boss part 46a being arranged at above-mentioned guide rod 46, and at the periphery upper side of the first moving body 54, in the upper wall portions of the first moving body 54, be the locking recess 54c of 5 mortar shapes in multistage position is formed with multiple, the present embodiment with separating predetermined distance.And, in the mode by the substantial middle of this locking recess 54c, be the mark 54d of 5 annular groove shapes in fore-and-aft direction forms multiple, the present embodiment in the periphery of the first moving body 54 with separating predetermined distance.

On above-mentioned second moving body 55 from after be formed with central diameter portion 55a, the large-diameter portion 55b thicker than this central diameter portion 55a in order, with above-mentioned central diameter portion 55a roughly with footpath and long central diameter portion 55c, with this central diameter portion 55c roughly with footpath and short and possess screw section central diameter screw section 55d and than external diameter screw section 55d this carefully and with the tapped hole 57a of above-mentioned bar operation unit 57 roughly with the small-diameter thread portion 55e in footpath.

In adjustable lever 44 of the present invention, the second moving body 55 small-diameter thread portion 55e being set to top is inserted in the large footpath hole 54a of the first moving body 54, the central diameter screw section 55d of the second moving body 55 be threaded into the central diameter tapped hole 54b of the first moving body 54 and forwards give prominence to, on this basis, by trimming bolt 58 is chimeric with the protuberance screw thread of this central diameter screw section 55d, make the second moving body 55 and the first moving body 54 tight joint.In addition, the small-diameter thread portion 55e at the top of above-mentioned central diameter screw section 55d be threaded into the tapped hole 57a of bar operation unit 57 and forwards give prominence to, on this basis, by fixing bolt 59 is chimeric with the protuberance screw thread of this small-diameter thread portion 55e, bar operation unit 57 pushes the stepped part 55f between central diameter screw section 55d and small-diameter thread portion 55e, with the second moving body 55 tight joint.

On the other hand, this adjustable lever 44 is fixed by the locking body 56 of the orthogonal insertion of boss part 46a with above-mentioned guide rod 46.This locking body 56 by spherical shank 56a, be threaded into this spherical shank 56a and be made up of the screw section 56c of upper and lower set screw nut 56b, 56b and spherical shank 56a tight joint, the cone shape locking protuberance 56d on top that is formed at this screw section 56c, and be equipped with fixed hole 46b on the top of the boss part 46a of above-mentioned guide rod 46 along radial direction.

In structure as above, when carrying out returning benchmark position of the fulcrum after the operation such as the exhaust of grade or the confirmation of regular event in drug liquid tube, in a word, first, before operation, slide by making the first moving body 54 of adjustable lever 44, fix in assigned position and locking body 56, set benchmark position of the fulcrum substantially thus, then, by making the second moving body 55 of adjustable lever 44 rotate, at assigned position tight joint trimming bolt 58, thus said reference position of the fulcrum is finely tuned, adjustable lever 44 records tram.And, only take off above-mentioned locking body 56 and carry out above-mentioned operation.After operation, as long as the first moving body 54 of adjustable lever 44 is returned and engaged the original position that body 56 engages, fulcrum cam 41 just can be made correctly to return benchmark position of the fulcrum, correctly can spray with former spray volume.

In detail, hold the bar operation unit 57 of above-mentioned adjustable lever 44, the boss hole 46d that first moving body 54 inserts guide rod 46 is slided, make adjustable lever 44 to fulcrum cam 41 slide, simultaneously, hold the spherical shank 56a of above-mentioned locking body 56, by the screw section 56c of locking body 56 being screwed into the fixed hole 46b of guide rod 46, the locking recess 54c of the regulation of the first moving body 54 be in boss hole 46d and the locking protuberance 56d on 56c top, this screw section can be made to engage, enable the first moving body 54 relatively engage protuberance 56d and engage in multistage position.

Then, unclamping under trimming bolt 58 makes the rotating state of bar operation unit 57, hold this bar operation unit 57 to rotate, rotate in the central diameter tapped hole 54b of the first moving body 54 by making the central diameter screw section 55d of the second moving body 55, second moving body 55 is moved to the fulcrum cam 41 being in benchmark position of the fulcrum, the central diameter portion 55a of the rear end of the second moving body 55 is engaged with the large-diameter portion 43a of linking department 43.Thereafter, when the trimming bolt 58 that tight joint unclamps, when second moving body 55 is fixed on the first moving body 54, the length (hereinafter referred to as " datum length ") 61 engaging recess 54c to the regulation engaged with locking body 56 from the fulcrum cam 41 being in benchmark position of the fulcrum is fixed.Like this, relative first moving body 54 of the second moving body 55 is made can to engage without level position.

And when carrying out the operations such as the confirmation of exhaust or the regular event waited in drug liquid tube, unclamp the screw section 56c of locking body 56, after taking off from the locking recess 54c of the first moving body 54, push-and-pull adjustable lever 44 carries out slide.After above-mentioned operation, use the above-mentioned adjustable lever 44 that have recorded datum length, the boss hole 46d that first moving body 54 of this adjustable lever 44 inserts guide rod 46 is slided, the locking recess 54c of the regulation of the first moving body 54 is engaged with the locking protuberance 56d of locking body 56 again.Thus, rapid reproducing-reference length 61, correctly can make benchmark position of the fulcrum corresponding to the locking position engaging body 56 with the first moving body 54, can make the position of fulcrum cam 41 rapidly and correctly return benchmark position of the fulcrum.

By possessing this return structure, even such as because benchmark position of the fulcrum is between each scale 47a of dial 47, cannot the situation of the position of reading pointer 48 fully in dial 47, fulcrum cam 41 also can be made to return correct benchmark position of the fulcrum.In addition, when making adjustable lever 44 to fulcrum cam 41 slide, arrange and mark 54d described above, with this mark 54d for target, can confirm whether the locking protuberance 56d engaging body 56 engages with the locking recess 54c of regulation.

In addition, under the state of unclamping above-mentioned trimming bolt 58, when the central diameter screw section 55d of the second moving body 55 is rotated in the central diameter tapped hole 54b of the first moving body 54, the boss part 46a of guide rod 46 arranges front and back anti-turn bolt 60,60, with make the first moving body 54 not together with the second moving body 55 interlock rotate.In the mode opposed with above-mentioned fixed hole 46b on this boss part 46a, be equipped with front and back anti-rotating hole 46c, 46c at radial direction, screw section 60a, 60a of above-mentioned anti-turn bolt 60,60 are screwed into this anti-rotating hole 46c, 46c.

And the top of this screw section 60a, 60a is connected to the outer circumferential face with above-mentioned locking recess 54c opposition side by the first moving body 54 in boss hole 46d, thereby, it is possible to prevent the interlock of the first moving body 54 from rotating.In addition, in the present embodiment, the outer circumferential face of the first moving body 54 of the top abutting of screw section 60a, 60a is still curved surface, but also only the outer peripheral portion of abutting can be processed into plane, make to increase with the area of contact on the top of screw section 60a, 60a, rotational resistance is increased, as long as reliably prevent the interlock of the first moving body 54 from rotating, then the shape of abutment portion, structure do not limit especially.

Namely, one end of wobble crank 40 and the both-way movable body and connecting rod 37 driving reciprocal driving pump and diaphragm pump 29 are linked, the other end of eccentric cam 42 with this wobble crank 40 is linked, make this eccentric cam 42 rotary actuation, thus make above-mentioned wobble crank 40 do crank-motion, and the fulcrum cam 41 of swing pivot is provided as at the length direction middle part of above-mentioned wobble crank 40, adjustable lever 44 and this fulcrum cam 41 are linked, by making this adjustable lever 44 to the length direction slide of wobble crank 40, in the pump drive 28 of position that can move rapidly above-mentioned fulcrum cam 41, above-mentioned adjustable lever 44 possesses the first moving body 54, its length direction at above-mentioned wobble crank 40 slides, and can engage with locking body 56 in multistage position, second moving body 55, it slides along this first moving body 54, can engage with this first moving body 54 without level position, and, above-mentioned fulcrum cam 41 is linked with one end of this second moving body 55, at the other end of the second moving body 55, bar operation unit 57 is set, therefore, by combination can be multistage be positioned to engage the first moving body 54 of body 56, with second moving body 55 that infinitely can be positioned this first moving body 54, can make the position of the fulcrum of spray volume fulcrum cam 41 before changing and benchmark position of the fulcrum correctly with the first moving body 54 to engage that body 56 engages locking position corresponding, even if after spray volume changes, as long as pull bar operation unit 57 carries out operation, the first moving body 54 is engaged with former locking position, just make fulcrum cam 41 rapidly and correctly return benchmark position of the fulcrum, prevent spray volume before changing after spray volume on produce large error, there is no the uneven of liquid effect, realize the increase making material yielding, the raising of quality, and it is too much to there is not liquid, the reduction of liquid cost can be realized.

In addition, above-mentioned first moving body 54 and the second moving body 55 are inside and outside two layers of tubular construction that can mutually be configured at slidably in concentric shafts, therefore, it is possible to make above-mentioned adjustable lever 44 become compact structure, can improve the operability of adjustable lever 44, maintenance.

And, above-mentioned second moving body 55 is inserted in the inside of above-mentioned first moving body 54, and the engaged part that can engage with above-mentioned locking body 56 is set integratedly in the periphery of the first moving body 54 and namely engages recess 54c, therefore, need not with the first moving body 54 split arrange and engage recess 54c, can number of components be reduced, the reduction of component costs and the raising of maintenance can be realized.

And, the periphery of above-mentioned first moving body 54 is arranged for the mark 54d estimated with engage engaged part that body 56 engages and namely engage the position of recess 54c, therefore, even if when cannot confirm when engaging recess 54c and being hidden in locking body 56 grade, also can hold for standard the position engaging recess 54c with above-mentioned mark 54d, the first moving body 54 reliably can be locked on former locking position.

Utilizability in industry

Pump drive of the present invention, except can being applied to illustrated soil disinfection machine, also in the manufacturing mechanisms such as chemical plant, can be applied to in the high diaphragm type of various liquid of correct spray volume conveying corrosivity or the driving of the reciprocal driving pump of plunger type.

Claims (4)

1. a pump drive, one end of wobble crank links with driving the both-way movable body of reciprocal driving pump by it, the other end of eccentric cam and this wobble crank is linked, this eccentric cam is driven in rotation, described wobble crank is made to do crank-motion thus, and at the length direction middle part of described wobble crank, swing pivot is set, adjustable lever and this swing pivot are linked, by the length direction slide of this adjustable lever along wobble crank, the position of described swing pivot can be moved rapidly thus, it is characterized in that

Described adjustable lever possesses: the first moving body, and its length direction along described wobble crank slides, and can engage with locking body in multistage position; Second moving body, it slides along this first moving body, and can engage with this first moving body without level position, and one end of described swing pivot and this second moving body links, and arranges bar operation unit at the other end of the second moving body.

2. pump drive as claimed in claim 1, it is characterized in that, described first moving body and the second moving body make inside and outside two layers of tubular construction that can mutually be configured at slidably in concentric shafts.

3. pump drive as claimed in claim 1 or 2, is characterized in that, insert described second moving body in the inside of described first moving body, and, the engaged part that can engage with described locking body is set integratedly in the periphery of the first moving body.

4. pump drive as claimed in claim 3, it is characterized in that, the periphery of described first moving body arranges mark, and this mark is for the position estimated with engage the engaged part that body engages.