CN100379601C - Control handle head of mobile floor delivery tool and moving speed conveyor - Google Patents

Abstract

The device contains a Hall sensor (18') for controlling traveling movement of the vehicle, whose output signal is proportional to the angle of rotation of the drive switch handle and/or a magnet carrier (20) with two permanent magnets (21,22). The Hall sensor is securely mounted so that faulty radial and axial movements transferred to the rotation shaft (14') of the magnet carrier do not cause drive signal errors. - AN INDEPENDENT CLAIM is also included for a drive value generator for a measurement arrangement for generating control signals for propulsion drive control.

Description

The control handle head of motor-driven floor delivery tool and scanning frequency value forwarder

Technical field

The present invention relates to the special-purpose control handle head of motor-driven floor delivery tool; be furnished with the operation actuating device of a controller with the control floor delivery tool; the control handle head is arranged on the free end of control handle body; comprise control handle loudspeaker and a control handle head shell that is arranged in control handle body lengthening part; from the approximate shaft-like handle that laterally extends in the both sides of control handle loudspeaker facing to the control handle loudspeaker; be crooked and the approximate bracket section that is parallel to the extension of control handle loudspeaker in the transition of the outer end of this shaft-like handle; begin once more supporting section crooked and that be connected with parts through the bracket section of associating to the transition of control handle body; wherein; constitute a protection toxoplasm by bracket section and supporting section; form handle opening

And, between each handle and control handle loudspeaker, be provided with a speed change handwheel, their rotating shafts on being positioned at control handle loudspeaker rotation that moves forward and backward, the approximate connection axis that is equivalent between the handle in the position of this rotating shaft, and constitute a controller shaft that crosses the control handle housing

In addition, establish two control buttons at least, be arranged on the basin shape face or dip plane of supporting section in each side of control handle loudspeaker,

Also have a scanning frequency value forwarder, it can be by will being bearing in speed change handwheel on the control handle loudspeaker from the initial rotation position or the size of the angular adjustment floor delivery tool speed that turns left to the right when moving forward and backward,

Fixedly be located at a magnetic switch in the rotating shaft by handling as the speed change handwheel of the controller of scanning frequency value forwarder,

This rotating shaft is equivalent to the above-mentioned rotating shaft that is positioned on the control handle loudspeaker, and in other words, it is parallel to the rotating shaft campaign of the speed change handwheel that constitutes controller shaft under the situation that forms certain converter speed ratio, and is subjected to the influence of rotating shaft,

This rotating shaft can reach and the corresponding different angles of the antagonistic force position that acts on pull back spring in the rotating shaft of speed change handwheel, under the reseting torque effect, can get back to and the corresponding initial rotation of the speed of 0km/h position, simultaneously, scanning frequency value forwarder is bearing in the scope of control handle head shell together with its electric and/or electronic unit

Magnetic switch is fixed in the control handle loudspeaker housing by one, and side and circuit card keep certain distance, and magnet carrier free to rotate composition,

Arranged the Hall sensor of a conveyor line sex ratio position on circuit card, the position is aimed at the contact cap shape shell on being located at magnet carrier,

On the rotating magnet carrier in the enclosure fixed and arranged the permanent magnet of two apart determining deviations, the relative permanent magnet projection of Hall sensor when magnet carrier is rotated, can be adjusted permanent magnet with respect to magnet carrier,

According to the output signal of Hall sensor, through an electronic building brick, micro controller system can produce the run signal of the rotating speed of run signal that moves forward and backward and the operation actuating device of controlling floor delivery tool according to the corner of magnet carrier,

In addition, placed a neutral switch that uses as safety switch at permanent magnet or on the control surface of permanent magnet shell,

This neutrality switch only discharges under the corner of the magnet carrier of stipulating for the run signal near switch control floor delivery tool moving velocity,

The circuit card that the position of magnet carrier is bearing in un-rotatably in a side and in control handle loudspeaker scope between control handle head shell bottom and the top keeps a determining deviation, rotating shaft faces toward the side wall supports of control handle horn bulb on radial bearing, and circuit card is bearing on the bearing on the opposite of rotating shaft.

In addition, the invention still further relates to a kind of scanning frequency value forwarder of being furnished with the motor-driven floor delivery tool measurement mechanism of control handle head and rotatable speed change handwheel, can produce the adjustment signal of control operation actuating device and other signal of floor delivery tool operation with respect to neutral position (not running state) corner according to the speed change handwheel, comprise a linear-static Hall element, Hall sensor is fixedly mounted on the circuit card, be orientated relative with rotating magnet carrier above it, can produce the ratio output signal of control operation according to the corner of speed change handwheel, on circuit card, arrange at least a portion electronic metering equipment and a micro controller system simultaneously, to carry out signal conditioning.

Background technology

Through being bearing in the speed change handwheel in control handle loudspeaker right side and left side, can adjust the advancing of floor delivery tool by rotating, to retreat the size with speed, because the rotating shaft of speed change handwheel is connected with a ratio switch, ratio switch produces for example needed adjustment signal of control operation actuating device, as long as be associated with the corner of speed change handwheel with lifting control, revolution control or upset control, this adjustment signal also can be used for lifting control, revolution control or upset control.

People know already at the control handle head and use this ratio switch to control the floor delivery tool of handling with control handle, in order to control the operation actuating device, according to potentiometer of German patent DE 44 44 772A1 design, allow potentiometer effectively be connected with the shared rotating shaft of two speed change handwheels.

The present invention is based on the control handle head of European patent EP 1 180 473 A1, adopted a magnetic switch, it is to be arranged in the control handle loudspeaker housing by one, the side keeps certain distance with the circuit card that is fixed therein, and can constitute by the magnet carrier that the speed change handwheel rotates in the certain angle scope; On circuit card,, arranged the Hall sensor of a conveyor line sex ratio position highlightedly simultaneously with respect to the inboard that is placed in the contact cap shape shell on the magnet carrier.

In a contact cap shape shell, on rotating magnet carrier, separated by a distancely arranged two blocks of permanent magnets, therefore Hall sensor can adjust permanent magnet with respect to Hall sensor with respect to two permanent magnet projections when the rotor magnet carriage.After receiving the output signal of Hall sensor, through an electronic building brick that has micro controller system, according to the corner of magnet carrier, the run signal that produces the run signal that moves forward and backward and control operation actuating device speed.

The quadrangle pin that constitutes the rotating shaft of speed change handwheel is bearing on the sidewall on loudspeaker top, and both sides are preset with bearing carrier ring and bearing body, and magnet carrier is fixed on the quadrangle pin, can move or rotate according to its radial and axial adjustment.

The quadrangle pin passes circuit card at the position that is provided with clear opening, and can rotate on a radial bearing with respect to the side wall supports on loudspeaker top.

Magnet carrier comprises two blocks of permanent magnets, and separated by a distance being arranged on the circular body is as the circular body of Hall sensor.When magnet carrier rotated, two blocks of permanent magnets did not come in contact along with the corner of speed change handwheel correspondingly is the top that round symmetric figure operates in the magnetic Hall sensor, with circuit card and be connected contact pin and keep the distance.The measurement signal of Hall sensor provides one and the proportional observed reading of position associated magnetic field at this moment, and this observed reading is used as the speed rated value of floor delivery tool engine management system.

Hall sensor just is used as a Hall sensor that transmits static linear position here, and its output signal is directly proportional with the corner of speed change handwheel.The permanent magnet of fixed and arranged on magnet carrier be with respect to the motion of static Hall sensor when rotating according to the speed change handwheel, the variation that draws the Hall sensor magnetic potential, and magnetic potential influences this sensor voltage variation of output signals.

Also need to use in addition a microswitch though be used for the above-mentioned this known electric mechanical measurement mechanism of operation control system, this microswitch is by " neutral position " that is positioned at the switch groove on the permanent magnet shell on the magnet carrier can controlled handle head speed change handwheel, and deviation is very little, but for known control system technical some difficulty.

Neutral position is equivalent to " zero " corner, is actually the idle running that certain perceives.

Need utilize such idle running, so that cut off or remove the signal of linear-static Hall sensor near zero output the time, because if not, under given " zero " corner, engine management system may can be received a faint run signal all the time.

The engine management system et out of order, on the one hand may be since the configuration of microswitch wrong and be worn due to, also may be owing to due to the operation speed change handwheel,, also have diametral load or lateral forces to the speed change handwheel because except simple turning effort.In this case, the bearing of speed change handwheel on the control handle loudspeaker must have the slit.The result must cause, and utilizes rotating shaft to be connected securely and plays the relative motion of the iron acting permanent magnet generation of operation electromagnetism with respect to Hall sensor on the circuit card between two speed change handwheels, makes Hall sensor produce unnecessary output voltage (run signal).

In addition, verified as a shortcoming, according to the terms of settlement that is adopted so far, Hall sensor is that manual welding gets on, and bends on one of the permanent magnet of magnet carrier or another direction easily away from the connection contact pin of circuit card on perpendicular to the direction of magnet carrier like this.

Will cause Hall sensor to pass the magnetic field of permanent magnet so asymmetricly.

The result causes voltage to change at neutral position on the one hand, but also can cause the center of speed change handwheel and the voltage on the terminal backstop to change.This situation will cause advance with reverse direction in the different maximum speed of terminal location.

Such situation also took place in the implementation process in the past, promptly be designed to the mechanical terminations backstop of the speed change handwheel of wing wheel, owing to use for a long time, may be easy to occur the plastic parts wearing and tearing, cause its tolerance to become big gradually, cause permanent magnet on Hall sensor, to collide, the connection contact pin of Hall sensor thereby bend.

After after a while, connect the contact pin fracture, may cause the beyond thought result of operating personal under certain conditions, under worst situation, will export whole output voltage, be equivalent to " at full speed " run signal.

Neutral position by microswitch supervision speed change handwheel only just often carry out in the pull back spring function of speed change handwheel, but actual conditions often is not like this.

The Hall sensor that other reason also may cause magnet carrier and permanent magnet thereof and protrude in circuit card bumps, or with it contact brush past.

In addition, magnet carrier or be bearing in securely permanent magnet on the bearing unexpected axially or radial motion also may cause this situation.

Unexpected axially or radial motion may be because the error of bearing or since external force the influence of the speed change handwheel that rotating is caused, for example the operator firmly thrusts facing to the terminal backstop of speed change handwheel with thumb, flat-out acceleration on the ground of injustice (not establishing recoil spring) floor delivery tool.

Vibrations, impact or operate the speed change handwheel suddenly and all may produce wrong run signal, cause means of delivery to produce unexpected velocity variations suddenly, and thereby cause danger.

These destructive influences can be intercepted and captured in the engine control electronic unit in certain error limit, and wherein acceleration/accel is restricted, even so, but still have certain residue risk.

The fault rootstock of others mainly is the mechanical inaccuracy of speed change handwheel bearing and method of operation, the rotating shaft of speed change handwheel, and the configuration of permanent magnet and Hall sensor and circuit thereof.May cause on the magnet carrier two blocks of permanent magnets thus and explore the radial displacement of Hall sensor, thereby make the magnetic potential measure of the change in the Hall sensor error occur with respect to the position.

Aspect use microswitch measurement neutral position, microswitch often is a problem in the location correction of lateral distance magnet carrier on the circuit card, because about the enough not accurate production tolerance in the position of microswitch switching contact.

Each microswitch all must specifying calibration.Microswitch and all can be subjected to mechanical wear with its collector bow of shift knob operation, wearing and tearing year in year out can make its neutral region enlarge, capture the measurement range of Hall sensor more and more, therefore improved minimum permission starting speed, the user of floor delivery tool has been felt begin starting just as ballistic kick.

The problem of Chu Xianing is the high wear out failure of microswitch simultaneously, all will operate microswitch because change to advance at every turn when retreating.

In addition, to proofread and correct the position of Hall sensor on perpendicular to the direction of circuit card under away from the situation of magnet carrier be a job of taking a lot of work very much connecting contact pin, connects on the contact pins because Hall sensor is welded on three, and need to aim at.

Simultaneously, as mentioned above, under the situation that the connection contact pin bends, the danger that magnet carrier and Hall sensor collide may take place.

Summary of the invention

In view of the above, task of the present invention is, overcomes the mechanical inaccuracy that causes the axially unexpected and radial displacement of magnet carrier and cause the polygon bearing pin of this kind displacement, prevents the fault that causes owing to this mechanical inaccuracy basically.

In addition, should guarantee the motion of the floor delivery tool that a simple microswitch with a conventional confguration form takes place in the time of just can bringing into operation with controlling and stop at unexpected mal as far as possible than detected neutral position more reliably in the past.

In order to solve above-mentioned task, the motor-driven floor delivery tool that starts described the sort of type for this paper has designed a kind of control handle head, wherein:

The Hall sensor of conveyor line sex ratio position flushes to crouch puts and is fixed on fixed in position on the circuit card of control handle head, its position is directly below two permanent magnet pivot region of magnet carrier or side, two blocks of permanent magnets space certain distance on the rotational plane parallel with circuit card, play the operation electromagnet, wherein, the connection contact pin of Hall sensor is on the plane of a pleurapophysis for circuit card

In a certain distance apart from one another two blocks of permanent magnets arrange that by identical magnetic pole orientation therefore, the magnetic pole that the permanent magnet of certain pitch arrangement of being separated by cooperatively interacts has different polarity on magnet carrier, i.e. the north and south poles, or the South Pole and the arctic,

Magnet carrier is placed in the rotating shaft of speed change handwheel or is placed in the rotating shaft that runs parallel with certain converter speed ratio, adopt frictional connection, in addition, it is on the circuit card opposite that magnet carrier has a supporting in addition, be arranged on the bearing of magnetic shell side of permanent magnet, simultaneously, rotating shaft is placed on the control of magnet carrier adjustment wheel on one side in a center bearing pilot bearing hole

Adjust wheel the spoke made from flexible material is housed, spoke is on the adjustment wheel plane vertical with rotating shaft, becomes scroll to extend radially outwardly from the outer bearing sleeve of rotating shaft or the bearing hole that is located at this,

Simultaneously, spoke be each to the elasticity spoke, horizontal also flexible to the spoke plane,

Adjust the upper end that wheel is arranged on the bearing body of outer bearing, wherein, bearing body is around extending to circuit card with open guide wall,

In guide wall, for supporting shaft simultaneously on circuit card, inserted an in-to-in butt joint bearing, be fixed in the clear opening of the expansion of rotating shaft on the circuit card, accurately cooperate in bearing body with guide pin bushing towards bearing body.

Simultaneously designed a kind of scanning frequency value forwarder from excellent again, wherein:

Magnet carrier and circuit card are arranged on the pivot bearing in a certain distance apart from one another as structural unit fastened to each otherly, simultaneously, a butt joint bearing and a guide pin bushing have been fixedly installed for the outer bearing of pivot bearing in the clear opening of on circuit card, establishing for the rotating shaft of speed change handwheel, the rotating shaft that can support the speed change handwheel by this butt joint bearing on the one hand, support the side bearing body of the outer bearing of magnet carrier on the other hand through this butt joint bearing, the shell of permanent magnet stretches out with one heart through a circular arc member on bearing body, adjust wheel and spoke thereof in the bearing body through being integrated in simultaneously, magnet carrier and shell are fastened in the rotating shaft.

In order to suppress magnet carrier and to play the axial and radial motion that the iron acting permanent magnet of operation electromagnetism meets accident, should make magnet carrier and be bearing in this part the axially unexpected and radial motion power decoupling of application force and the speed change handwheel rotating shaft that then occurs of permanent magnet on the magnet carrier securely, for this reason need be in rotating shaft carry out special fixing and guiding to magnet carrier, so that create conditions for the motion of permanent magnet and rotating shaft application force decoupling axial unexpectedly and radial motion through special-purpose radial and axial bearing.

Because realized the decoupling of application force, the motion of permanent magnet just is coupled on the position of Hall sensor regularly.Therefore, especially can not owing in the rotating shaft or the speed change handwheel on " swing " produce an effective run signal of off-square.

Decoupling mechanism is by arranging that in a side of the magnet shell of magnet carrier a pivot bearing realizes, this pivot bearing will be designed to the polygon pin on the one hand in an outer bearing that originates in the magnet shell rotating shaft is fixed on and is designed to adjust in the bearing body part of wheel, this pivot bearing is docked on the butt joint bearing that is inserted in the outer bearing on the other hand, and this butt joint bearing is fixed on circuit card in the clear opening in this place.In described butt joint bearing, can support through a pivotally supported rotating shaft polygon pin.But the polygon pin preferably has a free guide through hole to pass cross-sectional plane in-to-in degree of opening endoporus in the circuit card scope.Additional supporting-point is established in rotating shaft no longer in addition in the circuit card scope.

According to the present invention, the adjustment wheel has can be on all directions, can be at axially and directly make progress crooked " spoke " of rotating shaft, the latter is being coiled by the outer bearing sleeve of adjusting wheel and is being extended radially outward the outer rim of adjusting wheel, just extend at this place around the supporting mass of outer bearing, this supporting mass mainly is to be made of the housing outer wall boundary member that is located on the magnet carrier that is used for fixing permanent magnet.

Spoke is made with flexible material, is coiling to extend radially outward on the adjustment wheel plane perpendicular to rotating shaft.

Spoke be each to the elasticity spoke, can be with respect to adjusting the bending of wheel flat transverse.

Simultaneously, its bearing of rotating shaft process is bearing in the opposite of circuit card.Be fixed on the circuit card at the butt joint bearing of in the rotating shaft clear opening, having preset that has enlarged for this reason, and utilize a guide pin bushing will dock in the bearing body that bearing inserts the magnet carrier outer bearing exactly.

As previously mentioned, a rotating cover plug can be installed in guide pin bushing, import the polygon pin of rotating shaft by this cover plug, and subsidiary to the polygon pin with radial support, the polygon pin can be rotated whereby.

According to according to the present invention, the adjustment of whole outer bearing and belt wheel spoke wheel is (the POM material) made as an integral plastics injection moulding member with magnet carrier and subsidiary permanent magnet shell.This material not only is used for magnet carrier and outer bearing (comprising used bearing body) thereof, but also is used for fixing the butt joint bearing on circuit card, and as previously mentioned, the latter comprises that cooperates an accurate guide pin bushing.

The result proves that the performance of this plastic sliding bearing aspect wearing and tearing and durability is fabulous.

According to another embodiment of the invention, except can be in the bearing body of outer bearing for the guide pin bushing of butt joint bearing provides the radial support, can also provide axially mounting for guide pin bushing with respect to bearing body.Thereby form in the outside of guide pin bushing part around the bearing projection, and correspondingly form in the bearing body inboard of magnet carrier outer bearing part around depression.

According to the present invention, another of variable-speed controller is characterised in that, the Hall sensor plane of transmission ratio static position is placed also to be fixed on and fixedly is placed on the interior circuit card of control handle head, wherein, the connection contact pin of Hall sensor at avris away from circuit card.Can significantly improve the mechanical stability of structure like this,, but utilize advanced SMD technology downhand welding on circuit card because Hall sensor no longer is supported on the thin and easily curved connection contact pin.This is absolute firm and stable mechanical connection, has high repeatable accuracy in the course of processing, because can pick and place the location that automat is realized Hall sensor automatically by so-called element.

The magnet carrier band the permanent magnet slip and is crossed the Hall sensor that place on the plane, and the error that the mechanical terminations backstop of the variation of less shaft support or speed change handwheel takes place can not cause the collision of permanent magnet and Hall sensor.

In addition, according to the present invention, to permanent magnet and extremely made special arrangement, utilize the field line of the permanent magnet of layout separated by a distance to make the surface of Hall sensor produce suitable magnetic potential, when rotating the speed change handwheel on a covering of the fan, permanent magnet is with the motion of magnet carrier course of emergency Hall sensor.

According to the present invention, permanent magnet with identical pole orientation layout separated by a distance, has different polarity towards the different utmost points on magnet carrier, i.e. north and southern, or Nan Hebei.

Just as shown in the drawing, the magnetic field of two blocks of permanent magnets overlaps, and magnetic line of force vertically debouches the surface of the Hall sensor of placing on the plane.

Verified, when permanent magnet was taked such layout with respect to Hall sensor, the ratio output signal that Hall sensor sends was relevant with the corner of magnet carrier, thereby also relevant with permanent magnet position with respect to Hall sensor on magnet carrier.

Permanent magnet is under the situation of the axial and radial motion that meets accident, the stronger variation of Hall sensor output signal of Chu Xianing simultaneously is easy to by magnet carrier and is integrated in the adjustment wheel in the outer bearing and is compensated at the working accuracy that can reach of the used plastic bearing of all flexible spoke of all directions.

Different with the mutual layout of two permanent magnet poles, when adopting under the situation that is arranged vertically Hall sensor on the circuit card, it then is that Hall sensor is placed between two south magnetic poles separated by a distance that the magnetic pole that is adopted is arranged.

In addition, when according to one embodiment of the present invention, when being furnished with the neutral position of contact cam and the microswitch detection magnet carrier that is located at the switch groove on the permanent magnet shell by one, consider based on the working accuracy that can reach and to obtain more accurate testing result, according to another embodiment of the invention, replace microswitch or use the contactless magnetic switch of one or two change type Hall sensor form in addition, must adopt suitable method below each piece permanent magnet, on the north magnetic pole of magnet and the crossover position between the south magnetic pole, to finish detection exactly at the neutral position on the circuit card (corner is 0).

In this case, finish the position sensing of neutral position under the situation of correspondingly arranging hall switch with respect to permanent magnet, this moment, hall switch did not send any output signal, and suppressed wrong pending run signal.

But after leaving neutral position, Hall sensor then has an output signal, and this output signal all has identical magnitude of voltage (for example 5 volts) to the right when turning left through the center.

Hall switch can be accepted a regulation " connection " or " disconnection " state, depends on magnetic-field intensity.

One or several hall switches must be selected aspect position and sensitivity like this, and promptly only in " Neutral " running state (neutral position), one or several switches are just accepted " connection " state.

When the adjustment wheel of operation speed change handwheel and magnet carrier, magnetic field changes, and in a narrow as far as possible predetermined angular scope, running state is converted to " disconnection ".

For the reason of redundancy, adopt two hall switches, because just might advance, retreat like this and move in the micro controller system of controlling the scanning frequency signal and replenish reasonableness check in generation.In addition, so also might compare with proportional voltage signal.

The shortcoming of the microswitch of employed definite neutral position is so far: the angle range of triggering microswitch is inaccuracy very, because the error of the perforate that the butt joint bearing of confession magnet carrier moves therein on the circuit card is too big; In addition, also there is error the position of microswitch on circuit card; The function of microswitch is triggered through a collector bow with shift knob, collector bow may bend through multi-pass operation after a period of time, the result that can cause " neutral range " to enlarge year in year out, this is that user institute is not acceptant, because the resolution that it will underspeed and adjust, ballistic kick takes place in floor delivery tool easily when rotating the speed change handwheel in addition under surpassing the situation of switching threshold, therefore reduces the manoevreability of vehicle; The adjustment of neutral range bothers very much when mounted in addition, and the abrasion factor of microswitch is high especially when using above-mentioned functions, because its frequency of utilization is high especially.Use hall switch to determine that neutral position especially has the following advantages: to use automat can accomplish that the installation site is accurate; The long-time neutral range that uses does not change; Cost of installation is cheap; Use not wearing and tearing of hall switch; Use two change type hall switches can carry out reasonableness check, especially safe.

In addition, adopt the known method according to the control handle head design of European patent EP 1 180 473 A1, speed change handwheel and rotating shaft can obtain favourable supporting at the control handle head.

According to the present invention, the main portion of control handle head design is the layout of the design-calculated electric mechanical measurement mechanism according to the present invention, this measurement mechanism result from variable-speed controller as scanning frequency value forwarder and according to the present invention design-calculated magnet carrier and outer bearing thereof and be installed in butt joint bearing on the circuit card, and the butt joint bearing on circuit card special fixed form and used Hall unit and permanent magnet thereof at its locational arrangement.

According to the present invention, the Hall unit that replaces hall switch and on hall switch, use, " dry-reed contact " also can be used as magnetic switch and uses, for example SMD REED SENSOR PRX+21005-10AW model (article number: 185067-14) dry-reed contact and 14,1MM type reed switch.

The said goods can adopt and insert use based on the identical layout of the magnetic switch of Hall sensor, wherein will use permanent magnet equally.Permanent magnet comprises multiple different version, can accurately weld with SMD technology and its shell as Hall sensor.Operating process equally triggers by magnetic field with Hall sensor, is contactless equally therefore.Reed switch is vacuum-packed, does not therefore have environmental corrosion and electrocorrosion, can use for a long time, need not maintenance.

Description of drawings

According to a preferable control handle head embodiment, the invention will be further described to utilize accompanying drawing, and the differentiation of scanning frequency value forwarder is described simultaneously below, in the accompanying drawing:

Fig. 1 is the transparent view of first preferable control handle head embodiment, the view of looking towards its control handle loudspeaker and both sides protection toxoplasm and handle opening direction;

Fig. 2 is the contrast figure of control handle casing top and bottom, wherein shows parameter handwheel that is fixed in the rotating shaft and the controller that is arranged in a scanning frequency value forwarder on the rectangular circuit board especially;

Fig. 3 a, 3b is the transparent view of whole scanning frequency value forwarder, comprise circuit card, Hall sensor and with the controller shown in the parts explosion (being made up of the butt joint bearing guide pin bushing on magnet clamper, permanent magnet, polygon rotating shaft and the circuit card) gives a microswitch that serves as neutral switch as replenishing hall switch by Fig. 3 b;

Fig. 4 on the sectional plane that passes controller to the birds-eye view of Fig. 3 scanning frequency value forwarder;

Fig. 5 is to the birds-eye view of scanning frequency value transmitter circuit plate among Fig. 3, has Hall sensor and two hall switches on the circuit card, and wherein the magnet clamper is removed, but has plugged guide pin bushing;

Fig. 6 is to the birds-eye view of scanning frequency value transmitter circuit plate among Fig. 3 a and the 3b, has Hall sensor and two hall switches on the circuit card, and wherein the magnet clamper is removed, does not have guide pin bushing;

Fig. 7 is the cross sectional drawing that passes the controller assemblies that comprises guide pin bushing and magnet clamper, and wherein outer bearing is placed on the guide pin bushing;

Fig. 8 is for passing the cross sectional drawing (DETAIL X=X detail drawing) of guide groove in the outer bearing of magnet carrier and the bearing junction between the guide pin bushing that docks bearing;

Fig. 9 is the lateral plan at magnet carrier and switch groove place thereof, and the switch groove is in the outside of the permanent magnet housing of microswitch one control cam;

Figure 10 is the cross sectional drawing that passes magnet carrier;

Figure 11 is the B-B cross section according to Figure 10, passes the cross sectional drawing (SCHNITT B-B=B-B cross section) of permanent magnet and magnet fixed mount shell;

Figure 12 sees the birds-eye view of magnet carrier from above;

Figure 13 is for to pass the cross sectional drawing (SCHNITTA-A=A-A cross section) of magnet carrier according to the A-A tangent line among Figure 10;

Figure 14 is the birds-eye view to circuit card, and circuit card has from the guide pin bushing of circuit card installed in front (not having magnet carrier);

Figure 15 is for passing the viewgraph of cross-section SCHNITT B-B=B-B cross section of circuit card and bearing carrier ring according to the B B ' tangent line among Figure 14);

Figure 16 is for only to have installed the viewgraph of cross-section (DETAIL C=C detail drawing) that amplifies on the circuit card of guide pin bushing according to Figure 15; (the C detail drawing of Figure 15)

Figure 17 is the enlarged view (DETAIL D=D detail drawing) of circuit card installed in front guide pin bushing; (the D detail drawing of Figure 14)

Figure 18 is for adopting the measurement mechanism scheme drawing of two blocks of permanent magnets, and two blocks of permanent magnets are positioned on the circuit card of the linear Hall sensor of planar configuration;

Figure 19 is for adopting the measurement mechanism scheme drawing (Magnetmitte=magnetic center line) of two blocks of permanent magnets and linear Hall sensor and two other hall switch;

Figure 20 is the electronic signal process block diagram;

Figure 21 is the diagram of curves that the Hall sensor output voltage changes during with respect to initial rotation rotated position gear change hand lever up ± 30 ° under the dead ship condition, manifests hall switch and the corner switching characteristic curve (2.5 volts of output signals) with respect to the neutral position variation simultaneously;

Figure 22 is the relation that manifests move forward and backward signal and corner;

Figure 23 is a speed signal and turn right with respect to neutral position and the relation of left-hand rotation corner;

Figure 24 is the birds-eye view to scanning frequency value forwarder, wherein, as the alternative scheme that replaces two hall switches, has only provided a hall switch and has added a microswitch as neutral switch with other.

Description of reference numerals:

1 attaching parts

2 control handle heads

3 control handle loudspeaker

The 3a bottom half

3b casing top

3a, 3b control handle head shell

The handle of 4,5 control handle loudspeaker

The bracket section that 6,7 handle side are other

8,9 supporting sections

10,11 handle openings

12,13 speed change handwheels (wing wheel)

The rotating shaft of 14 speed change handwheels (controller shaft)

14 ' serve as the quadrangle pin of rotating shaft (14)

15,16 control buttons

15 ', 16 ' dip plane

17 scanning frequency value forwarders

The controller of 18 scanning frequency value forwarders

18 ' linear Hall sensor

18a, b, c connects contact pin

19 pull back springs

20 magnet carrier

The permanent magnet of 21,22 controllers

Switch groove on the 23 permanent magnet housings

The control surface of 24 hull outside

25 neutral switches (microswitch)

The cap shape shell of 26 permanent magnets

The control cam of 27 ribbon gymnastics vertical pole microswitches

28 circuit cards

29 back of circuit board

Clear opening on the 30 control handle loudspeaker

Magnet carrier pivot bearing on 31,32 circuit cards

The outer bearing of 31 magnet carrier

Butt joint bearing on 32 circuit cards

33,34 cover plugs (neck bearing of speed change handwheel)

36 bearing carrier rings (outer bearing of speed change handwheel)

37,38 stop straight pins

39 guide grooves

40 supports

The loudspeaker upper portion side wall of 42,43 band shaft bearing covers

41-47 (spacing)

48 protecting human body switches

The contact cam of 48 ' protecting human body switch

49 bear table top

50 slow-action microswitches

51 amplifiers

52 horn switches

The contact cam of 52 ' horn switch (52)

53,53 ' hall switch

54 outer bearings (31) are gone up the adjustment wheel of magnet carrier

55 adjust the scroll spoke of wheel (54)

56 adjust wheel (54) goes up the fixedly quadrangle support holes of quadrangle rotating shaft

The bearing carrier ring of 57 spokes

58a, b, c centre hole

The bearing body of 58 ' magnet carrier (20) outer bearing

Chuck on the 59 butt joint bearings

59 ' stop claw

Bearing groove in 60 magnet carrier (20) outer bearings (31)

The bearing projection of 61 butt joint bearings

Magnet fixer on 62 magnet carrier

63 micro controller systems

65 run signal mouths

The 66 rated value mouths that advance

67 retreat the rated value mouth

The guide pin bushing of 68 butt joint bearings

Groove milling on 69 guide pin bushings (68)

70 turnings

71,71 ' correcting cam

72 adjust the wheel rim of wheel

The clear opening of 73 circuit cards

The endoporus of 74 guide pin bushings

The specific embodiment

The control handle head (2) of vehicle shown in Fig. 1 and Fig. 2 is made of the structure of a similar steering handwheel and operating console, it has two fixing handles (4,5) and handle opening (10,11), be for the speed change handwheel (12 that forms by two cams of handling usefulness about control handle loudspeaker (3) center line both sides, 13), similarly be a wing wheel.In addition, there is control button (15,16) to concentrate on the both sides of control handle loudspeaker (3), is convenient to two hand steered going up like this and operates with the thumb of a hand or two hands at handle (4,5) at control handle head (2).As the common practice of ground traffic tools, a human body protection switch (48) is arranged in the outer end of the control handle loudspeaker (3) of control handle head (2).

According to Fig. 1 and Fig. 2, control handle head (2) has dip plane or basin shape face (15 ', 16 '), with protection control switch (15,16) in the scope of control handle loudspeaker (3), preestablishes handle (4, the 5) inclination of basin shape towards the control convenience loudspeaker.Basin shape face also can tilt in the bracket section (6,7) of lateral handle (4,5).In addition, at bottom half and casing top (3a, form one on the control handle loudspeaker 3b) and bear the controller (18) that table top (49) is used for placing scanning frequency value forwarder (17), wherein, the rotating shaft (14) of two speed change handwheels (12,13) is bearing in respectively on the bearing body of both sides in the scope of bottom, control handle loudspeaker upper box top (3b).Scanning frequency value forwarder (17) has a controller (18), and a side is furnished with Hall sensor (18 ').

Control handle head (2) is subordinated to the control handle that the script of an electric floor means of delivery that does not illustrate among the figure is represented with draw bar.Control handle head (2) has control handle loudspeaker (3) at the lengthening section of draw bar, according to the birds-eye view of Fig. 1, and its shape approximation rectangle.At downside, control handle loudspeaker (3) extend out to before the bearing body obviously evagination downwards.

Fig. 2 only shows bottom half (3a) and casing top (3b) of control handle head, according to Fig. 1, and the speed change handwheel (12,13) that control handle has manifested all control buttons (15,16) and has been placed in control handle loudspeaker (3) both sides at assembled state.Wherein also show a human body protection switch (48).It can be met usually from different directions in the position of this protection switch, just causes a switching manipulation after running into, and floor delivery tool is then towards the direction motion opposite with the people who handles it.

The right and left at control handle loudspeaker (3) or attaching parts (1) is equipped with the supporting section (8,9) that stretches out to the both sides respectively, and this supporting section is outside more thin more.At supporting section (8,9) bracket section (6 has been settled at two ends respectively, 7), this bracket section is approximate to be parallel to control handle loudspeaker (3) and to extend on one side to its operator, is carrying out the transition to shaft-like handle (4,5) under the about 90 ° situation of new bending, shaft-like handle (4,5) end extends on the sidewall (42,43) of speed change handwheel (12,13) outside control handle loudspeaker (3).

Form protection toxoplasm and handle opening (10 respectively in the both sides of control handle loudspeaker (3); 11); therefore just can hold handle (4 fully with a hand; 5); and can arrive at control handle loudspeaker (3) and supporting section (8 with the forefinger that stretches out; 9) control button (15,16) on the basin shape face (15 ', 16 ') that the transition region between forms.

Speed change handwheel (12,13) utilize its rotating shaft (14) be bearing in the sidewall (42,43) that constitutes with bearing body perpendicular to control handle loudspeaker top an axle around, can rotate.The trend of rotating shaft approaches to meet the axis near the handle (4,5) of speed change handwheel (12,13).As can be seen, based on such design, an available hand channel is crossed handle opening (10,11) and is just caught handle (4,5) from behind and on the upper side.

Bearing table top (49) is located at respectively, in the bottom half (3a) and casing top (3b) in the control handle loudspeaker scope, be used for settling being shown in detail in the scanning frequency value forwarder (17) that is used to control the moving velocity of electric floor means of delivery among Fig. 3-17 and moves forward and backward.For the angular transposition that limits the speed change handwheel (12,13) of adjusting rotating shaft (14) and the bearing of stable rotating shaft, on bearing body, be provided with guide groove (39,40), this guide groove round for rotating shaft (14 ") pass clear opening (30) extension of establishing.

In the outer clear opening (30) of control handle loudspeaker, be respectively equipped with bearing carrier ring (35,36), utilize cover plug (35 ', 36 ') located in the above to carry out rotatably support through this bearing carrier ring (35,36) countershaft (14).

In Fig. 1, rotating shaft (14) is represented by being drawn into corresponding rotation axis.

Control handle head (2) and bottom half (3a) thereof and casing top (3b) and control handle loudspeaker all are made of plastic, wherein cavity structure is adopted at the bottom half of control handle head and casing top respectively, cavity structure carries out the transition to the handle (4,5) of control handle loudspeaker side always.

In order to stablize the tank wall of casing part, as among Fig. 2 to shown in the bottom half birds-eye view of control handle head, disposed the intersection cross wall respectively in inside.

According to Fig. 2, the bottom half and the casing top of contrast control handle head show the left speed change handwheel (12) and right hand wheel (13) respectively among the figure, be designed to the rotating shaft (14) of polygon pin (14 '), and the controller (18) of scanning frequency value forwarder (17).Controller comprise one the band cap shape shell (26) magnet carrier (20), cap shape shell be looped around a magnetic pickup device permanent magnet (21,22) around shield.

In addition, control handle head (2) have a circuit card (28) to be bearing in control handle loudspeaker casing (3a, opposite 3b) can not be shifted, and are utilized to arrange magnetic pickup device (18 '); Control handle head (2) also has a supporting member to be used for supporting the pull back spring (19) that the speed change handwheel reaches the magnet carrier of rotating with the speed change handwheel.

Two cover plugs (33,34) that control handle loudspeaker (3) scope is housed are passed in the rotating shaft (14) that is designed to polygon pin (14 '), can rotate in the bearing carrier ring (35,36) of speed change handwheel.

Can be clear that the assembly of the design-calculated scanning frequency value forwarder (17) according to the present invention in Fig. 2, it is made of circuit card (28) and the controller (18) that is installed on this circuit card.Described two speed change handwheels (12,13) are captiveed joint with the rotating shaft that is designed to polygon pin (14 ') (14), give this rotating shaft force transmission.Controller (18) is installed on its circuit card (28) of supporting, can same magnet carrier (20) rotate with respect to circuit card together.

Circuit card is fixedly mounted between control handle head (2) bottom half and the casing top.It is equipped with a horn switch (52) and a protecting human body switch mentioned above (48).

Can see the whole assembly that scanning frequency value forwarder (17) and circuit card (28) make up in the transparent view of Fig. 3 a, electronic building brick is welded on the circuit card according to the block diagram of Figure 20.Electronic building brick does not all have numbering.

From the circuit card as can be seen, the assembly of controller (18) is by magnet carrier (20), butt joint bearing (32), polygon pin (14 ') and permanent magnet (21,22) form, among the figure, these parts of controller (18) illustrate with parts explosion with respect to circuit card.

Guide pin bushing (68) has the centre hole that aims at it and establish on circuit card (58c), it utilizes the correcting cam (71,71 ') that stretches out to insert in the centre hole exactly for 58a, 58b, and utilizes a chuck (59) chucking in the clear opening (73).

Can peg graft on the guide pin bushing (68) of butt joint bearing (32) outer bearing (31) of radially-protruding magnet carrier (20), wherein, outer bearing (31) is provided with a supporting design-calculated bearing body (58 ').

In addition, according to the present invention, as shown in Figure 7 and Figure 8, the areal of support of butt joint bearing and outer bearing (31,32) utilizes a mutual flush fit of side bearing.Outer bearing has a bearing groove (60) in the bottom scope of the bearing body (58 ') of magnet carrier (20), butt joint bearing (32) has a bearing projection (61) in guide pin bushing (68) scope.Basically do not have the space in the time of so can guaranteeing magnet carrier (20) through bearing (31,32) guiding circuit card, thereby guarantee to keep equidistant substantially with the position and the circuit card of the mobile permanent magnet (21,22) of magnet carrier (20).

At bearing body (the 58 ') top of magnet carrier (20) cylindrical part,, adjust wheel (54) and be combined into an integral body with scroll spoke (55) promptly on its top of outer bearing (31).Adjusting wheel has a quadrangle bearing hole (56), and it is used for fixing the rotating shaft that is designed to quadrangle pin (14 ') in this scope as a quadrangle receptor.

Employing is according to the present invention during the design-calculated spoke, the adjustment wheel that has quadrangle bearing hole (56) allows to do axially and radial motion with respect to quadrangle pin (14 '), therefore, though adjusting bearing carrier ring (57) wedge of wheel is embedded on the quadrangle pin (14 '), still can cause permanent magnet (20 on the magnet carrier, 21) guide with may act on speed change handwheel (12,13) go up the complete decoupling of interference effect power that inevitable radial impact takes place in real-world operation.Can be not again the observed reading of linear Hall sensor not be exerted an influence.

Each that adjust wheel (54) can be absorbed in laterally little impact to the rotating shaft that is designed to quadrangle pin (14 ') to flexible scroll spoke (55), because shaft support is in the casing of control handle head, when radial impact took place, impact will be delivered on the speed change handwheel (12,13).

The spoke (55) of adjustment wheel (54) is to make as an integral plastics injection moulding member with the remainder of adjusting wheel and magnet carrier (20), and use is polyformaldehyde (POM) plastics.Bearing body (58 ') is attached in to be adjusted on the wheel (54), and therefore, whole outer bearing (31) is the component part of integral plastics injection moulding member.

The butt joint bearing (32) that connects outer bearing (31) particularly docks the guide pin bushing (68) of bearing, all adopts commaterial to make.

The butt joint bearing equally also is an integral plastics injection moulding member.

Employed plastic material can be avoided bigger bearing error takes place aspect wearing and tearing and the durability fabulous performance being arranged like this, thereby can not produce and do not wish the run signal that produces.

Bearing body (58 ') that slides and guide pin bushing (68) are preferably exhausted the big diameter of possibility mutually.

The diameter of above-mentioned two bearing parts should accurately cooperate, and does not almost have the space between two parts when guaranteeing to move.

Scroll spoke (55) is S-shaped, extends outwardly into the annular wheel rim (72) of adjusting wheel from the internal bearing sleeve (57) of adjusting wheel (54), and the latter is converted to the sidewall of the shell (26) of supporting permanent magnet.

Adjust wheel (54) in being designed to columnar bearing body (58 '), be positioned at contact cap shape shell (26) side in addition of permanent magnet (21,22).

The axial width of spoke (55) is bigger several times than its radial wall thickness that records.

The outer bearing (31) of magnet carrier (20) through establishing for it through adjusting the bearing carrier ring (57) of wheel (54) spoke (55), is fixed in the rotating shaft (14) that is designed to the polygon pin, axially and radially all can not be shifted.It is flexible having only spoke.

Spoke (55) is S-shaped to outer rim (72) extension of adjusting wheel (54) from the corner that cross-sectional plane is designed to tetragonal bearing carrier ring (57), and looking to the outside of bearing body (58 ') is to extend along anticlockwise direction.

Bearing body (58 ') preferably directly by the part of permanent magnet (21,22) around the sidewall of contact cap shape shell (26) constitute (seeing Fig. 3 a, b and Fig. 4).

From Fig. 7 and Fig. 8, can clearly be seen that, guide pin bushing (68) inside and the outside of bearing body (58 ') and butt joint bearing (32) all are columnar, since guide pin bushing (68) have part around radially evagination bearing projection and because there is corresponding depression the inboard of bearing body (58 '), so two parts cooperatively interact.

At the downside of guide pin bushing (68) the outwardly directed turning (70) of a step is arranged, the downside of the contact cap shape shell (26) of magnet carrier (20) just is on this turning.

The downside of guide pin bushing (68) be insert centre hole (58a, b, c) Nei correcting cam (71), guide pin bushing is so as to being fixed on the circuit card (28).

On circuit card (28), guide pin bushing (68) is to be fixed in the clear opening (73) of the rotating shaft (14) that is located at this place, in the time of fixedly, except centre hole (58a, b c) in addition, also will utilize the correcting cam (71) of guide pin bushing and be located at the chuck (59) of the band stop claw (59 ') of this place's downside equally.

The Hall sensor (18 ') of measuring two blocks of permanent magnets (21,22 ') magnetic field is welded on the circuit card in flat condition utilization advanced person's SMD technology.(18a, b c) no longer vertically stretch from circuit card (28) its connection contact pin, and the magnet carrier (20) of no longer leaving away through it when rotating owing to the flush arrangement of Hall sensor comes in contact.

Because adopt SMD technology welding Hall sensor, in the course of processing, the position of Hall sensor can accurately be determined basically.Install obviously more firmly, shock and vibration can not change the position of Hall sensor.

Except Hall sensor (18 '), on a circular arc of the clear opening (73) of circuit card (28), along the outer control surface (24) of magnet shell (26), one side respectively weld a hall switch (53,53 ') in the SMD technology of using equally of Hall sensor respectively.These hall switches are used to determine the position of magnet carrier (20), when switch groove (23) appears at the center of Hall sensor (the 18 ') top of carrying out position measurement, need provide the position of magnet carrier (20).Hall switch is an electronic building brick, and as Hall sensor, its function will be utilized Hall effect, is to obtain the sort of switching characteristic shown in Figure 21 under described situation.Reach very fast switching effect by magnetic hysteresis, amplify this switching effect with an integrated Schmidt trigger then, by Schmidt trigger with the value of regulation output signal clearly.Hall switch preferably accurately is positioned on the circuit card, does not need its switching point is proofreaied and correct separately.

In order to satisfy the security requirement that is improving in some application scenario, when determining the neutral position of magnet carrier, shown in Fig. 3 b, except using one or two hall switch (53,53 ') in addition, also use a microswitch (25), the projection switch lever of microswitch is embedded in the switch groove (23), and its on off state sends to the micro controller system (63) in the block diagram shown in Figure 20.

In the birds-eye view of Fig. 4, the layout of controller (18) is in order to allow the people see the quadrangle rotating shaft (14) of the scroll spoke (55) of adjusting wheel (54) and the magnet carrier (20) that is in place especially easily clearly.This magnet carrier is taken away in Fig. 5, people can directly see the guide pin bushing that is in place (68) and the quadrangle rotating shaft (14) of butt joint bearing (32), and linear position two hall switches (53,53 ') of measuring Hall sensor (18 ') and using as neutral switch.In next width of cloth figure (Fig. 6), guide pin bushing (68) is dismantled, only sees hall switch (53,53 ') and Hall sensor (18 ') on circuit card (28).The signal of at least one hall switch (53,53 ') is deciphered in control electronic building brick and micro controller system (63) as the incoming signal that enters neutral range according to the block diagram of Figure 20.Second signal of additional hall switch only with the protection of doing result of a measurement, because it has the security association of very high detection neutral position, can make vehicle parking reliably.

Then; micro controller system (63) sends the " STOP " signal to run signal mouth (65); guide engine shutdown in the engine control electronic building brick that this signal does not illustrate in the drawings, even advancing rated value speed mouth (66) and retreat rated value speed mouth (67) and also have the output of small voltage.This small voltage output is ignored in engine management system fully.The result can see in Figure 23.Among the figure, 0.5 the volt magnitude of voltage be equivalent to original given speed maximum voltage value (5 volts) 10%, this maximum voltage value both had been suitable for positive rotation direction, also be suitable for the rotation direction born, at speed change handwheel (12,13) angle value of gained is-3 ° to+3 ° on the neutral zero position, vehicle parking in this angular range.It shown in the superincumbent diagram of curves (Figure 21) the hall switch signal of (53,53 ').Be in linear position in the neutral range measure the low voltage value of Hall sensor (18 ') force to be converted to by micro controller system (63) invalid.

It shown in Fig. 9-13 detail drawing of magnet carrier (20), among the figure, be furnished with the adjustment wheel (54) of scroll spoke (55) and constitute the quadrangle bearing hole (56) of adjusting the quadrangle acceptor of taking turns (54) and all belong to technical measures, so as to the application force decoupling of between the quadrangle rotating shaft (14) of speed change handwheel (12,13) and magnet carrier (20), guaranteeing to expect to realize.Scroll spoke (55) can utilize its elasticity to absorb this little impact under the situation of the laterally little impact of countershaft (14) generation, even and also can be delivered to magnet carrier (20) to the rotational motion of rotating shaft reliably when little impact takes place.Magnet fixer (62) is integrated on the magnet carrier, and it clamps and tighten each piece permanent magnet (21,22) one by one by chuck.Can see switch groove (23) in Fig. 9 and Figure 10, it is used to realize the power operation to microswitch, and microswitch can slide during at pressurized at the contact cam on the control surface (24) in the magnet carrier shell outside.

Figure 14 shows that birds-eye view, the guide pin bushing (68) of butt joint bearing (32) only is housed on the circuit card circuit card (28).Guide pin bushing (68) be accurately positioned a series of centre holes on circuit card (58a, 58b, 58c) in, and be fixedly mounted on the circuit card by the chuck that plays the chucking effect (59), this can be clear that from the cross sectional drawing of Figure 16.Figure 15 shows that viewgraph of cross-section, along on the cross-sectional plane of the B-B ' tangent line of Figure 14 guide pin bushing (68) being installed to circuit card.Can see the guide pin bushing (68) after in birds-eye view, amplifying among Figure 17.It has a triangle endoporus (74) with big free cross-sectional plane, according to Fig. 5 not the quadrangle rotating shaft of tape spool cover insert in this delthyrium, can freely rotate.Its cylindrical outer surface constitutes the neck bearing relative with the outer bearing (31) of magnet carrier (20) (butt joint bearing (32)).This cylindrical outer surface has three groove millings (69) of guiding vertically, in these three groove millings, can be with the chuck (59) of stop claw (59 ') to adjust to the clear opening (73) that passes circuit card (28).

In Figure 18 and Figure 19, as can be seen, after Hall sensor (18 ') changes clinostatism into by upright position, in two blocks of permanent magnets (21,22) reverse must be arranged, can be so that obtain for the observed reading of handling by Hall sensor.In this case, as Figure 18 and shown in Figure 19, the direction of magnetic line of force in the scope of Hall sensor of opposite polarity permanent magnet (21,22) is opposite.

Carrying out the magnetic field position of magnetic measurement in Hall sensor on, each can get the magnetic flux density of two magnetic field sources and how much additions of field intensity vector component.Under the situation of the reverse magnetic line of force of this example, addition becomes subtracts each other, the minimum observed reading in the stack magnetic field that records is lower, and directly the greatest measurement under permanent magnet does not have to weaken because of the existence in another magnetic field basically, because according to coulomb magnetic field law, the reducing of the magnetic-field intensity in a magnetic field becomes quadratic relation with the distance of magnetic field sources.In view of the above, for a magnetic field of adding up, its minimum is compared far from each other with magnetic flux density with the situation of same polarity and equidirectional magnetic line of force with maximum field strength.Thus, the result of a measurement of Hall sensor is more accurate, because the resolution of the available field strength of each length distance of Hall sensor is bigger.Because how much additions are three-dimensional, the magnetic line of force direction that is added is inequality on each spatial point, so a little of result of a measurement and corner has nonlinear relationship, but still is acceptable under this routine application scenario.

What the block diagram among Figure 20 was represented is its center calculation unit, be micro controller system (63), therein signal is carried out logic operation, that is to say, to hall switch (53,53 ') signal and be connected with the signal of micro controller system, and transmit linear position Hall sensor (18 ') signal and carry out logic operation as for example signal of the mechanical neutral switch (25) of microswitch use here.The neutral switch of machinery (25) is used for replenishing the needed safety in some application scenario, and overlapping with the function of hall switch (53,53 '), and hall switch (53,53 ') is to be welded on the circuit card as the electronic circuit with the encapsulation of SMD technology.

In the hall switch integrated circuit, except the real Hall unit with the vertical proportional output voltage in magnetic field that passes it is provided, hall switch (53,53 ') electronic chip also comprises a pressure regulator, an electronic amplifier, a temperature equalization device, and an intersection binary pair.

Also in being commonly used in the tachometer value sensor of measuring the servomotor rotating speed, it is to be used for exigent project to the hall switch electronic chip basically.Therefore, can obtain highly stable rectangular signal at mouth.

According to the block diagram of Figure 20 task that to carry out signal conditioning be floor delivery tool proposes according to actual conditions with to the routine request of reliability and durability.Linear signal of processed just hall switch (18 ') and at least one and maximum two from switch state signal from a hall switch (53,53 ') and a microswitch (25) with whole neutral switching functions.Many application scenarios for greater safety for the purpose of, need a plurality of neutral on-off signals.Compare with hall switch, the advantage of microswitch is that for example it is a pure motor machine member, finishes its work according to the voltage on the circuit card (28).Microswitch obtains two output signals that have sign symbol from the voltage model of Hall sensor (18 '), with control back engine management system that connect and that do not illustrate in the drawings, comprise a rated value that advances that retreats on rated value and the mouth (66) on the mouth (67), see the averaged curve figure shown in Figure 22.According to one or more hall switches (53 that are made into, 53 ') or the signal of the neutral switch of microswitch (25), micro controller system obtains run signal at mouth (65), this run signal has the absolute priority that has precedence over all other signals, the engine management system control operation that allows or forbid the back to connect, then, retreat on the rated value mouth (67) or the rated value mouth (66) that advances on all launched machine control system of the magnitude of voltage that is lower than minimum starting speed rated value as invalid and ignore.So just, produce a minimum starting speed rated value, this value is defined as the minimum starting speed value of specifying floor delivery tool." advance " and " retreating " voltagerating value signal also will experience conversion and the amplification of once being undertaken by amplifier (51) after micro controller system, the signal of 0-5 volt is become the voltage signal of 0-24 volt.

In Figure 21 (above diagram of curves), at first can see the original signal U4 of Hall sensor (18 '), it by 0 hint change to+5 volts, in the center is that 2.5 Fu Chu are just in time through zero crossing, the corner that is equivalent to the speed change handwheel is " 0 " speed change handwheel (12 when spending, 13) neutral range, and flow to micro controller system (63) with this form.Can see some neutral switches on the diagram of curves of inserting at this place, the signal of for example some hall switches (53,53 '), as mentioned above, this signal triggering or close connect and the engine management system that do not illustrate in the drawings in back.

When speed change handwheel (12,13) corner is " 0 " degree, when being equivalent to " zero " moving velocity (neutral range), hall switch is in the center that turns to the permanent magnet above it, promptly in the north magnetic pole section of permanent magnet and boundary line one side between the south magnetic pole section, when this position, two hall switches (53,53 ') output signal U 2 and the value of U3 all be " zero " (seeing Figure 19, the position of permanent magnet center vertical dotted line).Only to the right or when leaving the Determination of Boundary between Upper section of permanent magnet left, relevant hall switch just can produce its output signal U 2 or U3, and this signal is not equal to zero, and all stably remains 5 volts under all are not equal to zero corner.

Can distinguish two move forward and backward adjustment value Uv and Ur in the diagram of curves of Figure 22 in the middle of promptly, these two values are equivalent to the speed change handwheel-30 ° angle range to 0 ° or 0 ° to+30 °.

Can see two output signals in the diagram of curves below Figure 23 is, it is mouth (66,67) rated value that moves forward and backward on, the variation range of two values is between 0 to+5 volts, the positive and negative corner that is equivalent to the speed change handwheel, but can differentiate, because they are to export at two of micro controller system (63) different mouths.Two speed signals also have a positive voltage value never simultaneously, move forward and backward because mean simultaneously like that.If this thing happens when makeing mistakes, back bonded assembly engine management system will the identification error state, and ignores two signals.

Its tangible dynamic switch characteristic as can be seen on the switching characteristic curve of hall switch in Figure 21 (53), the avris steepness is steeper relatively, corresponding transfer time is very short, disconnect and on-state under the same maintenance of signal level highly stable.

At last, in Figure 24, can also see the design of scanning frequency value forwarder of the present invention (17), different with version among Fig. 3 a and the 3b, have only a hall switch (53) and a microswitch (25) to be predetermined to be neutral switch.A signal that at first occurs in two signals of two neutral switches is detected by micro controller system (63), and no longer changes second signal subsequently, because two signals are to handle in the logical "or" computing in micro controller system.Micro controller system stops in its mouth (65) output " run signal " conduct.In order from micro controller system, to obtain opposite run signal " driving " (Frei), two neutral switches must be transformed into " Frei " (driving), must increase safety measure for this reason, need the special different switch on two principles that adopts, one of them is an electronics, and another is electromechanical.

Claims (22)

1. the control handle head (2) of the motor-driven floor delivery tool of driving with control handle; be furnished with the operation actuating device of a controller (18) with the control floor delivery tool; control handle head (2) is arranged on the free end of control handle body; comprise control handle loudspeaker (3) and a control handle head shell (3a who is arranged in control handle body lengthening part; 3b); from the approximate shaft-like handle (4 that laterally extends in the both sides of control handle loudspeaker facing to the control handle loudspeaker; 5); be crooked and the approximate bracket section (6 that is parallel to the extension of control handle loudspeaker in the transition of the outer end of this shaft-like handle; 7); begin once more supporting section (8,9) crooked and that be connected with parts through the bracket section of associating, wherein to the transition of control handle body; constitute a protection toxoplasm by bracket section and supporting section; form handle opening (10,11)

And, at each handle (4,5) and be provided with a speed change handwheel (12 between the control handle loudspeaker (3), 13), their rotating shafts (14) on being positioned at control handle loudspeaker rotation that moves forward and backward, the approximate connection axis that is equivalent between the handle (4,5) in the position of rotating shaft (14), and constitute a controller shaft that crosses the control handle housing

In addition, establish two control buttons (15,16) at least, be arranged on the basin shape face or dip plane of supporting section (8,9) in each side of control handle loudspeaker,

Also have a scanning frequency value forwarder (17), it can be by will being bearing in speed change handwheel (12,13) on the control handle loudspeaker from the initial rotation position or the size of the angular adjustment floor delivery tool speed that turns left to the right when moving forward and backward,

Fixedly be located at a magnetic switch in the rotating shaft by handling as the speed change handwheel (12,13) of the controller (18) of scanning frequency value forwarder (17),

This rotating shaft is equivalent to the above-mentioned rotating shaft (14) that is positioned on the control handle loudspeaker, and in other words, it is parallel to rotating shaft (14) motion of the speed change handwheel (12,13) that constitutes controller shaft under the situation that forms certain converter speed ratio, and is subjected to the influence of rotating shaft (14),

This rotating shaft can reach and act on speed change handwheel (12, the corresponding different angles of the antagonistic force position of pull back spring in the rotating shaft 13) (19), under the reseting torque effect, can get back to and the corresponding initial rotation of the speed of 0km/h position, simultaneously, scanning frequency value forwarder (17) is bearing in control handle head shell (3a together with its electric and/or electronic unit, in scope 3b)

Magnetic switch by one be fixed on control handle loudspeaker housing (3a, 3b) in, side and circuit card (28) keep certain distance, and magnet carrier free to rotate (20) forms,

Arranged the Hall sensor (18 ') of a conveyor line sex ratio position on circuit card (28), the position is aimed at the contact cap shape shell (26) on being located at magnet carrier (20),

Rotating magnet carrier (20) in shell (26) the has gone up fixed and arranged permanent magnet (21 of two apart determining deviations, 22), Hall sensor (18 ') is the permanent magnet projection relatively, when magnet carrier (20) is rotated, can adjust permanent magnet (21 with respect to magnet carrier (20), 22)

According to the output signal of Hall sensor, through an electronic building brick, micro controller system can produce the run signal of the rotating speed of run signal that moves forward and backward and the operation actuating device of controlling floor delivery tool according to the corner of magnet carrier,

In addition, upward placed a neutral switch that uses as safety switch at permanent magnet (21,22) or at the control surface (24) of permanent magnet shell (26),

This neutrality switch only discharges under the corner of the magnet carrier of stipulating (20) for the run signal near switch control floor delivery tool moving velocity,

The circuit card (28) that the position of magnet carrier (20) is bearing in un-rotatably in a side and in control handle loudspeaker scope between the control handle head shell bottom (3a) and top (3b) keeps a determining deviation, rotating shaft (14) is facing to the sidewall (42 of control handle horn bulb, 43) be bearing in radial bearing (31,32; 3 3-36) on, circuit card (28) is bearing on the bearing (31,32) on the opposite of rotating shaft (14), it is characterized in that:

The Hall sensor of conveyor line sex ratio position, (18 ') flushes to crouch and puts and be fixed on the circuit card of fixed in position in the control handle head, (28) on, its position is directly in magnet carrier, (29) two blocks of permanent magnets, (21,22) below of pivot region or side, two blocks of permanent magnets with circuit card, (28) space certain distance on the parallel rotational plane, play the operation electromagnet, wherein, Hall sensor, the connection contact pin of (18 '), (18a, b, c) at a pleurapophysis for circuit card, (28) plane

In a certain distance apart from one another two blocks of permanent magnets (21,22) are arranged by identical magnetic pole orientation on magnet carrier (20), therefore, the magnetic pole that the permanent magnet of certain pitch arrangement of being separated by cooperatively interacts has different polarity, be north and south poles, or the South Pole and the arctic

Magnet carrier (20) is placed on speed change handwheel (12,13) rotating shaft (14) is gone up or is placed in the rotating shaft that runs parallel with certain converter speed ratio, adopt frictional connection, in addition, it is on circuit card (28) opposite that magnet carrier (20) has a supporting in addition, be arranged in permanent magnet (21, on the bearing (31,32) of magnetic shell 22) (26) side, simultaneously, rotating shaft (14) is placed on the control of magnet carrier (20) adjustment wheel (54) on one side in a center bearing pilot bearing hole (56)

Adjust wheel (54) spoke made from flexible material (55) is housed, spoke (55) is in the adjustment vertical with rotating shaft (14) takes turns on the plane, becomes scroll to extend radially outwardly from the outer bearing sleeve (57) of rotating shaft (14) or the bearing hole that is located at this,

Simultaneously, spoke be each to the elasticity spoke, horizontal also flexible to the spoke plane,

Adjust the upper end that wheel (54) is arranged on the bearing body (58 ') of outer bearing (31), wherein, bearing body (58 ') is around extending to circuit card (28) with open guide wall,

In guide wall, in order to go up supporting shaft simultaneously at circuit card (28), inserted in-to-in butt joint bearing (32), be fixed in the clear opening (73) of expansion of rotating shaft on the circuit card (14), in bearing body (58 '), accurately cooperated with guide pin bushing (68) towards bearing body (58 ').

2. the control handle head of floor delivery tool according to claim 1, it is characterized in that, for the switch groove (23) on the control surface (24) that cooperates contact cap shape shell (26) constitutes neutral switch, the deflectable control cam (27) that serves as the adjacent microswitch (25) of safety switch use is adjustable, this microswitch has only the run signal that just discharges Hall sensor (18 ') when the deflection of control cam (27), with the moving velocity of control floor delivery tool.

3. control handle head according to claim 1, it is characterized in that, one or two hall switch (53 as neutral switch, 53 ') be to arrange like this in the slewing area of magnet carrier (20), it is speed change handwheel (12,13) when " zero " turned position, Hall switch just in time is in the center of the permanent magnet (21,22) of rotation.Send one 0 volt output signal this moment, when rotating the speed change handwheel, the mouth of Hall switch is accepted a constant output voltage, for example 5 volts.

4. the control handle head of motor-driven floor delivery tool according to claim 1, it is characterized in that, speed change handwheel (12,13) the polygon pin (14 ') that rotating shaft (14) by a rotatably support constitutes, this polygon pin is perpendicular to the outer wall of control handle loudspeaker and extend to circuit card (28) and the magnet carrier (20) that is used for settling used electromagnetism of scanning frequency value forwarder (17) and electronic building brick, and be arranged in this place's bearing (31,32) in the bearing body, in addition, rotating shaft (14) polygon pins (14 ') in a clear opening (30) are bearing on the outer wall of control handle loudspeaker housing

Rotating shaft (14), perhaps or rather, polygon pin (14 ') is directed through an additional hollow sleeve plug (33,34), and this cover plug is inserted on the termination of rotating shaft (14) outside,

Speed change handwheel (12,13) can only be to the right and deflect into a cooresponding hard-over of the moving velocity with floor delivery tool left, speed change handwheel (12,13) side has a stop straight pin (37 at the axial direction parallel with the rotating shaft (14) of speed change handwheel, 38), this stop straight pin is embedded into the certain radial distance of the rotating shaft (14) of leaving the speed change handwheel, in circumferencial direction is arranged in a guide groove (39) on the external wall of control handle horn casing with being the concentric circles arcuation.

5. the control handle head of motor-driven floor delivery tool according to claim 4, it is characterized in that, control handle loudspeaker housing is by control handle head shell bottom, (3a) and case top, a part (3b) constitutes, wherein, in the acceptor of these two housing parts that can interosculate, place scanning frequency value forwarder at least, (17) electronics and/or electromagnetic assembly, and this place can also utilize support, (40) fixed in position is supported magnet carrier, (20) circuit card of Zhuan Donging, (28)

Simultaneously, in the scope of the case top (3b) that constitutes control handle loudspeaker (3) epimere, arrange speed change handwheel (12,13) rotating shaft (14), rotating shaft (14) is positioned at the sidewall (42 that loudspeaker zone, control handle head shell top constitutes two apart segment distances of shaft bearing body, 43) between, on the outside of above-mentioned twice sidewall, arrange speed change handwheel (12,13), the speed change handwheel utilizes an axial inwardly protruding and constitutes cover plug (35 ' simultaneously, 36 ') the axle journal acceptance and the two ends of fixed rotating shaft, and have at least one radially outward to stretch out certain distance in addition, inwardly be parallel to the stop straight pin (37 that rotating shaft (14) is extended, 38), this stop straight pin is embedded into outside the sidewall (42,43) that is arranged in loudspeaker housing upper extent and at this with being circular arc to be located in guide groove (39) of incision.

6. the control handle head of motor-driven floor delivery tool according to claim 5, it is characterized in that, for speed change handwheel (12,13) rotating shaft (14) is bearing in two sidewalls (42 opposite one another of control handle loudspeaker case top (3b), 43) between, this locate closed ring along the circumferential direction around support region in set up two be aligned with each other accept opening as clear opening, bearing carrier ring (35,36) embed wherein as outer bearing, place the cover plug (35 ', 36 ') of admitting rotating shaft (14) two ends within it.

7. the control handle head of motor-driven floor delivery tool according to claim 1 is characterized in that, speed change handwheel and control fitting carriage (20,26) deflection+/-30 ° are set.

8. the control handle head of motor-driven floor delivery tool according to claim 4, it is characterized in that bearing (31,32) is a plain bearing, use diameter to cooperate and dock guide pin bushing (69) and the bearing body (58 ') of bearing (32) accurately, so that almost do not have the slit between two parts when moving.

9. the control handle head of motor-driven floor delivery tool according to claim 8, it is characterized in that bearing (31,32) is made into plastic bearing, simultaneously, adjust wheel (54) and scroll spoke (55) thereof and be injection moulded into the integral plastics member together with bearing body (58 ') and magnet carrier (20).

10. the control handle head of motor-driven floor delivery tool according to claim 9 is characterized in that, scroll spoke (55) extends outwardly into the annular wheel rim (72) of adjusting wheel from the internal bearing sleeve (57) of adjusting wheel (54) S-shapedly.

11. the control handle head of motor-driven floor delivery tool according to claim 10 is characterized in that, adjusts wheel (54) is in the contact cap shape shell (26) of permanent magnet (21,22) in being designed to columnar bearing body (58 ') the outside.

12. the control handle head of motor-driven floor delivery tool according to claim 11 is characterized in that, spoke (55) is at the width of axial direction big several times of the thickness that records in radial direction than it.

13. the control handle head of motor-driven floor delivery tool according to claim 1, it is characterized in that, the internal bearing sleeve (57) of adjusting wheel (54) is provided with a quadrangle bearing hole, so that wedge and fixedly be designed to the rotating shaft (14) of polygon pin (14 ').

14. the control handle head of motor-driven floor delivery tool according to claim 10, it is characterized in that, look to the outside of bearing body (58 ') and the adjustment wheel that is arranged in this place, the S-shaped scroll spoke (55) that stretches out from each angle of quadrangle bearing carrier ring (57) extends to the outer rim (72) of adjusting wheel (54) by anticlockwise direction.

15. the control handle head of motor-driven floor delivery tool according to claim 14 is characterized in that, bearing body (58 ') be by part around the sidewall of contact cap shape shell (26) of permanent magnet (21,22) constitute.

16. the control handle head of motor-driven floor delivery tool according to claim 15, it is characterized in that, guide pin bushing (68) inside and the outside of bearing body (58 ') and butt joint bearing (32) all are columnar, since guide pin bushing (68) have part around, the bearing projection (61) of evagination radially, bearing body (58 ') has in the inboard and caves in accordingly, thereby two parts can axially be worked in coordination.

17. the control handle head of motor-driven floor delivery tool according to claim 16, it is characterized in that, at the downside of guide pin bushing (68) the outwardly directed turning (70) of a step is arranged, the lower portion ground of the contact cap shape shell (26) of magnet carrier (20) is on this turning.

18. the control handle head of motor-driven floor delivery tool according to claim 17 is characterized in that, the downside of guide pin bushing (68) be insert centre hole (58a, b, c) Nei correcting cam (71), guide pin bushing is so as to being fixed on the circuit card (28).

19. the control handle head of motor-driven floor delivery tool according to claim 1 is characterized in that, on circuit card (28), guide pin bushing (68) is fixed in and is located at this place in the default clear opening (73) of rotating shaft (14).

20. the control handle head of motor-driven floor delivery tool according to claim 19 is characterized in that, in order to go up fixedly guide pin bushing (68) at circuit card (28), the chuck (59) that has increased band stop claw (59 ') at downside is inserted in the clear opening (73).

21. be furnished with the scanning frequency value forwarder of the motor-driven floor delivery tool measurement mechanism of control handle head and rotatable speed change handwheel, can be according to speed change handwheel (12,13) produce the adjustment signal of control operation actuating device and other signal of floor delivery tool operation with respect to neutral position (not running state) corner, comprise a linear-static Hall element (18 '), Hall sensor is fixedly mounted on the circuit card (28), be orientated relative with rotating magnet carrier (20) above it, can produce the ratio output signal of control operation according to the corner of speed change handwheel, on circuit card, arrange at least a portion electronic metering equipment and a micro controller system simultaneously, to carry out signal conditioning, it is characterized in that, magnet carrier (20) and circuit card (28) are arranged in a pivot bearing (31 in a certain distance apart from one another as structural unit fastened to each otherly, 32) on, simultaneously, going up in the clear opening (73) of establishing for the rotating shaft (14) of speed change handwheel at circuit card (28) is pivot bearing (31,32) outer bearing (31) has fixedly installed a butt joint bearing (32) and a guide pin bushing (68), can support speed change handwheel (12 by this butt joint bearing on the one hand, 13) rotating shaft, support the side bearing body (58 ') of the outer bearing (31) of magnet carrier (20) on the other hand through this butt joint bearing, permanent magnet (20,21) shell (26) is gone up at bearing body (58 ') and is stretched out with one heart through a circular arc member, adjust wheel (54) and spoke (55) thereof in the bearing body (58 ') through being integrated in simultaneously, magnet carrier (20) and shell (26) are fastened in the rotating shaft (14).

22. scanning frequency value forwarder according to claim 21 is characterized in that, has disposed according to Claim 8 to one of 20 pivot bearing (31,32) and adjusts wheel (54) and spoke (55).

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