CN206354682U - A kind of bi-motor three-tube type liftable desk - Google Patents

Abstract

The utility model provides a kind of bi-motor three-tube type liftable desk, including：Bracket, including first crossbeam, two second cross beams that are nested with first crossbeam that two or so side by side parallel are set, and symmetrically it is connected to the supporting plate at two first crossbeam two ends；Transmission mechanism, including two transmission components being respectively arranged on bracket；Double Motor Control box, is installed on second cross beam；Elevating mechanism, including two lifting assemblies for being symmetricly set in bracket two ends；Two bottom plates, are connected with lifting assembly respectively.A kind of bi-motor three-tube type liftable desk of the utility model, run simultaneously by Dual-motors Driving twin-screw, so that the synchronous rise and fall of the both sides lifting assembly of desk, other lifting assembly includes three mutually nested columns, realize secondary transmission so that changing the adjustable height of desk becomes more precisely and reliable.

Description

A kind of bi-motor three-tube type liftable desk

Technical field

The utility model belongs to field of mechanical technique, is related to a kind of desk, and particularly a kind of bi-motor three-tube type can rise Desk drops.

Background technology

Desk is a kind of very common office equipment in office now, but most desks are fixed, it is impossible to Regulation, it is impossible to adapt to the change of working environment and user of service's demand, make clerical workforce easily be produced in office process tired Feel, and office resource cannot be utilized effectively.

In summary, to solve the deficiency on existing office desk structure, it is necessary to design a kind of Height Adjustable, and lifting is put down Steady bi-motor three-tube type liftable desk.

The content of the invention

The purpose of this utility model is there is above mentioned problem for existing technology, it is proposed that a kind of Height Adjustable, and Lift stable bi-motor three-tube type liftable desk.

The purpose of this utility model can be realized by following technical proposal：A kind of bi-motor three-tube type liftable office Table, including：

Bracket, including first crossbeam, two the second horizontal strokes that are nested with first crossbeam that two or so side by side parallel are set Beam, and the symmetrical supporting plate for being connected to two first crossbeam two ends, wherein, a gear-box is provided with every first crossbeam；

Transmission mechanism, including two transmission components being respectively arranged in gear-box；

Double Motor Control box, is installed on second cross beam, and between two gear-boxes；

Elevating mechanism, including two lifting assemblies for being symmetricly set in bracket two ends, wherein, one end of lifting assembly and tooth The side of roller box is connected；

Two bottom plates, are connected with the other end of lifting assembly respectively；

Also include the Double Motor Control box line road for being used to control elevating mechanism, the Double Motor Control box line road includes center Processor, the first chip comprising model ATMEGA16A, power circuit, key circuit, motor-drive circuit, motor feedback Circuit；Power circuit is connected with central processing unit；Key circuit is connected to central processing unit input, and central processing unit, which is received, to be come Handled from the signal of key circuit, and to received signal；Motor-drive circuit is connected to central processing unit output End, motor-drive circuit receives the signal after central processing unit is handled, and according to the signal control motor motor received Working condition；Meanwhile, motor-drive circuit sends motor output signal to motor feedback circuit, the connection of motor feedback circuit To central processing unit.

In a kind of above-mentioned bi-motor three-tube type liftable desk, lifting assembly includes：Three mutually nested successively The first column, the second column and the 3rd column；Screw rod, is nested in the 3rd column, and one end and the transmission component of screw rod In gear train be connected, the other end of screw rod is connected with the first column；Fixed cover, is located on screw rod, and mutually solid by axle sleeve It is fixed.

In a kind of above-mentioned bi-motor three-tube type liftable desk, the second column includes：Second fall way；First card Part, is nested in one end of the second fall way, and positioned at the outside of the second fall way；Positioning sleeve, is nested in the another of the second fall way One end, and on the inside of the second fall way, and offer the through hole that is engaged with fixed cover along the thickness direction of positioning sleeve；It is some Individual first connection sheet, is set along the outside circular array for the second fall way for being nested with positioning sleeve one end；3rd column includes： 3rd fall way；Second fastener, is nested in one end of the 3rd fall way；Several second connection sheets, circular array is arranged at The other end of 3rd fall way, wherein, the structure of the second connection sheet is identical with the first connection chip architecture.

In a kind of above-mentioned bi-motor three-tube type liftable desk, the first positioning hole and the first card on the first column The first positioning convex point on part is corresponding；The first detent on first column and the first locating convex block phase on the first fastener Correspondence；The second positioning hole on second column is corresponding with the second positioning convex point on the second fastener, and second on the second column Detent is corresponding with the second positioning convex point on the second fastener；Wherein, the side of the first positioning convex point and the second convex The equal trimming in side of point.

In a kind of above-mentioned bi-motor three-tube type liftable desk, connecting hole on the second column respectively with positioning sleeve On connecting hole and the first connection sheet on connecting hole it is corresponding；Positioning hole on second column respectively with the positioning on positioning sleeve Hole is corresponding with the locating dowel in the first connection sheet；Locating dowel on positioning sleeve is corresponding with the positioning hole on the first column.

In a kind of above-mentioned bi-motor three-tube type liftable desk, the middle part of bottom plate is set in hollow form, along bottom plate The length direction of bottom surface offer several square slotted eyes in a word；The two ends of bottom plate are symmetrically each provided with a lower margin, and ground Pin is detachably connected with bottom plate.

Compared with prior art, a kind of bi-motor three-tube type liftable desk of the utility model, passes through Dual-motors Driving Twin-screw is run simultaneously so that the synchronous rise and fall of both sides lifting assembly of desk, and lifting assembly includes three phases in addition Mutually nested column, realizes secondary transmission so that changing the adjustable height of desk becomes more precisely and reliable.

Brief description of the drawings

Fig. 1 is a kind of structural representation of bi-motor three-tube type liftable desk of the utility model.

Fig. 2 is the mplifying structure schematic diagram at A in Fig. 1.

Fig. 3 is the structural representation at another visual angle of desk shown in the utility model.

Fig. 4 is a kind of partial structural diagram of bi-motor three-tube type liftable desk of the utility model.

Fig. 5 is the structural representation of elevating mechanism in the preferred embodiment of the utility model one.

Fig. 6 is the partial structural diagram of elevating mechanism in the preferred embodiment of the utility model one.

Fig. 7 is the explosive view of elevating mechanism in the preferred embodiment of the utility model one.

Fig. 8 is the structural scheme of mechanism of another preferred embodiment of the utility model

Fig. 9 is the mplifying structure schematic diagram at B in Fig. 8.

Figure 10 is Double Motor Control box circuit block-diagram.

Figure 11 is central processing unit (the first chip) figure.

Figure 12 is power circuit line map.

Figure 13 is motor feedback circuit circuit diagram.

Figure 14 is key circuit line map.

Figure 15 is motor-drive circuit line map.

Figure 16 is the 3rd chip figure.

In figure, 100, bracket；110th, first crossbeam；111st, crosspiece；112nd, vertical file；120th, second cross beam；130th, supporting plate； 140th, gear-box；200th, transmission mechanism；210th, transmission component；211st, motor；212nd, gear train；300th, Double Motor Control box； 310th, central processing unit；320th, power circuit；330th, motor feedback circuit；340th, key circuit；350th, motor-drive circuit； 400th, elevating mechanism；410th, lifting assembly；411st, the first column；411a, the first fall way；411b, the first mounting hole, 411c, First positioning hole；411d, the first detent；411e, the 6th positioning hole；411f, the second mounting hole；412nd, the second column； 412a, the second fall way；412b, the first fastener；412c, positioning sleeve；412d, the first connection sheet；412e, the second positioning hole； 412f, the second detent；412g, the first connecting hole；412h, the 3rd positioning hole；412i, the first locating convex block；412j, first Positioning convex point；412k, through hole；412l, the second connecting hole；412m, the 4th positioning hole；412n, the 3rd connecting hole；412o, first Locating dowel；413rd, the 3rd column；413a, the 3rd fall way；413b, the second fastener；413c, the second connection sheet；413d, the 5th determine Position hole；413e, the second locating dowel；413f, the second locating convex block；414th, screw rod；415th, fixed cover；416th, axle sleeve；417th, connect Set；417a, the 3rd locating dowel；417b, the 4th connecting hole；500th, bottom plate；510th, square slotted eye；520th, the 3rd mounting hole；530、 Lower margin.

Embodiment

The following is specific embodiment of the utility model and with reference to accompanying drawing, further is made to the technical solution of the utility model Description, but the utility model is not limited to these embodiments.

Embodiment one

As shown in Figure 1, Figure 2, shown in Fig. 3 and Fig. 4, a kind of bi-motor three-tube type liftable office that the utility model is provided Table, including：Bracket 100, including two or so side by side parallel set first crossbeam 110, two be nested with first crossbeam 110 Second cross beam 120, and the symmetrical supporting plate 130 for being connected to two two ends of first crossbeam 110, wherein, every first crossbeam 110 On be provided with a gear-box 140；Transmission mechanism 200, including two transmission components 210 being respectively arranged in gear-box 140；It is double Motor control box 300, is installed on second cross beam 120, and between two gear-boxes 140；Elevating mechanism 400, including two The individual lifting assembly 410 for being symmetricly set in the two ends of bracket 100, wherein, one end of lifting assembly 410 and the side of gear-box 140 It is connected；Two bottom plates 500, respectively the other end with lifting assembly 410 be connected, be used as the base of desk.

Preferably, as shown in figures 1 and 3, first crossbeam 110 is in I-shaped, wherein, first crossbeam 110 is included before two The crosspiece 111 that side-by-side parallel is set afterwards and the vertical file 112 for connecting the one end of two crosspiece 111, and two crosspieces 111 are set in hollow form Put；The section of second cross beam 120 takes the shape of the letter U, and is nested in the hollow part of first crossbeam 110, and fix by threaded fastener；Support Plate 130 is L-shaped, is connected to the other end of two crosspieces 111, and the side chamfering of supporting plate 130, improves the security of desk.

Preferably, as shown in figure 4, transmission component 210 includes：Motor 211；Gear train 212, the output shaft with motor 211 Nesting is connected, and is connected with the engagement of screw rod 414 in elevating mechanism 400, is rotated by the drive gear set 212 of motor 211, so that Drive screw rod 414 to rotate, and then realize the raising and lowering of lifting assembly 410.

Preferably, as shown in Fig. 4, Fig. 5, Fig. 6 and Fig. 7, lifting assembly 410 includes：Three successively mutually nested One column 411, the second column 412 and the 3rd column 413；Screw rod 414, is nested in the 3rd column 413, and screw rod 414 One end is connected with gear train 212, and the other end of screw rod 414 is connected with the first column 411；Fixed cover 415, is located on screw rod 414 On, and mutually fixed by axle sleeve 416, limit the moving radially on screw rod 414 of fixed cover 415.

Preferably, as shown in Fig. 5, Fig. 6 and Fig. 7, the first column 411 includes：First fall way 411a, one end is closing End, and the first mounting hole 411b is provided with along along each angle of blind end, realize and be detachably connected between bottom plate 500, separately One end is openend, and circular array is provided with several first positioning holes 411c, wherein, with the first positioning hole 411c's Several first detents 411d is provided with first fall way 411a edge, it is fixed by the first positioning hole 411c and first Position groove 411d, limits the most short relative distance between the first column 411 and the second column 412.

Preferably, as shown in Fig. 5, Fig. 6 and Fig. 7, the second column 412 includes：Second fall way 412a；First fastener 412b, is nested in the second fall way 412a one end, and positioned at the second fall way 412a outside；Positioning sleeve 412c, is nested in The second fall way 412a other end, and on the inside of the second fall way 412a；Several first connection sheets 412d, edge is nested with The second fall way 412a of positioning sleeve 412c one end outside circular array is set, and is used as the second fall way 412a and positioning sleeve Connecting portion between 412c.

Preferably, as shown in Fig. 5, Fig. 6 and Fig. 7, on the first fall way 411a for being nested with first fastener 412b one end Circular array is provided with several second positioning holes 412e, and several the second detents are provided with the edge at the end 412f, by the second positioning hole 412e and the second detent 412f, is limited between the second column 412 and the 3rd column 413 Most short relative distance；Be nested with circular array on the first fall way 411a of positioning sleeve 412c one end be provided with several first Connecting hole 412g, and each first connecting hole 412g both sides are each provided with one the 3rd positioning hole 412h.

Preferably, it is some along the side edge of first fastener 412b one end along being above provided with as shown in Fig. 5, Fig. 6 and Fig. 7 Individual first locating convex block 412i, and the first locating convex block 412i position is corresponding with the first detent 411d position, prevents When only the second column 412 is retracted, in direct the first column of retraction 411, so as to improve the reliability of desk；Along the first fastener Circular array is provided with several first positioning convex points 412j on the side wall of the 412b other ends, and the first positioning convex point 412j Position is corresponding with the first positioning hole 411c position, further improves the reliability of desk.

Preferably, as shown in Fig. 5, Fig. 6 and Fig. 7, through hole 412k is offered along positioning sleeve 412c thickness direction, with consolidating Surely set 415 is engaged, pilot hole when being lifted as the second column 412；Set along positioning sleeve 412c one end circular array There is several second connecting holes 412l, and each second connecting hole 412l both sides are each provided with the 4th positioning hole 412m, wherein, Second connecting hole 412l position is corresponding with the first connecting hole 412g position, is used as the second column 412 and positioning sleeve 412c Between connecting portion；4th positioning hole 412m position is corresponding with the 3rd positioning hole 412h position, is used as the second column Position point between 412 and positioning sleeve 412c.

Preferably, as shown in Fig. 5, Fig. 6 and Fig. 7, the first connection sheet 412d thickness direction is provided with the 3rd connection Hole 412n, and the 3rd connecting hole 412n position is relative with the first connecting hole 412g and the second connecting hole 412l position respectively Should；3rd connecting hole 412n both sides are each provided with one first locating dowel 412o, and the first locating dowel 412o is located at the first connection Piece 412d side, wherein, the first locating dowel 412o position and the 3rd positioning hole 412h and the 4th positioning hole 412m position It is corresponding, make it that the connection between the second column 412 and positioning sleeve 412c is more accurate by the first connection sheet 412d, so that So that the relative displacement between the second column 412 and the first column 411 changes more smoothly.

Preferably, as shown in Fig. 5, Fig. 6 and Fig. 7, the 3rd column 413 includes：3rd fall way 413a；Second fastener 413b, is nested in the 3rd fall way 413a one end；Several second connection sheets 413c, circular array is arranged at the 3rd lifting The pipe 413a other end, wherein, the second connection sheet 413c structure is identical with the first connection sheet 412d structures.

Preferably, as shown in Fig. 5, Fig. 6 and Fig. 7, the 3rd fall way 413a of second connection sheet 413c one end is installed Upper circular array is provided with several the 5th positioning hole 413d, and with the second locating dowel of side on the second connection sheet 413c 413e position is corresponding.

Preferably, as shown in Fig. 5, Fig. 6 and Fig. 7, if being above provided with along the side edge edge of the second fastener 413b one end Dry the second locating convex block 413f, and the second locating convex block 413f position is corresponding with the second detent 412f position, When preventing that the 3rd column 413 from retracting, in direct the second column of retraction 412, the reliability of desk is improved；Along the second fastener 413b Circular array is provided with several the second positioning convex points, and the second positioning convex point position and the second positioning on the side wall of the other end Hole 412e position is corresponding, further improves the reliability of desk.

Preferably, as shown in Fig. 5, Fig. 6 and Fig. 7, the first connecting hole 412g and the second connecting hole 412l are counterbore, and First connecting hole 412g and the second connecting hole 412l is screwed hole, and the 3rd connecting hole 412n is unthreaded hole.

Preferably, as shown in Fig. 5, Fig. 6 and Fig. 7, the first fall way 411a, the second fall way 412a and the 3rd fall way 413a section can be square, circular and polygon etc..

Preferably, as shown in Fig. 5, Fig. 6 and Fig. 7, the mechanism of the first positioning convex point 412j and the second positioning convex point is identical, Wherein, section of the equal trimming in the first positioning convex point 412j side of side and the second positioning convex point, i.e. the first positioning convex point 412j Face and the section of the second positioning convex point are in quadrangle.

Preferably, as shown in Fig. 5, Fig. 6 and Fig. 7, adapter sleeve is provided with the screw rod 414 away from the one end of axle sleeve 416 417, and the axis direction circular array of adapter sleeve 417 is provided with two the 3rd locating dowel 417a and two the 4th connecting holes 417b, and the 3rd locating dowel 417a and the 4th connecting hole 417b are spaced, wherein, the 3rd locating dowel 417a position and first The 6th positioning hole 411e position is corresponding on column 411；4th connecting hole 417b position and the second peace on the first column 411 The position for filling hole 411f is corresponding, realizes the accurate installation of adapter sleeve 417.

Preferably, as shown in figure 1, the middle part of bottom plate 500 is set in hollow form, along the length direction of the bottom surface of bottom plate 500 Several square slotted eyes 510 are offered in a word, wherein, the square slotted eye 510 in the middle part of the bottom surface of bottom plate 500 is corresponding the bottom of at The 3rd mounting hole 520 is provided with each angle of the surface region of plate 500, and the position of the 3rd mounting hole 520 is installed with first Hole 411b position is corresponding, realizes being detachably connected between the first column 411 and bottom plate 500；The two ends of bottom plate 500 are symmetrical A lower margin 530 is each provided with, and lower margin 530 is detachably connected with bottom plate 500, and the ground where desk is laid to leveling.

Embodiment two

Preferably, as shown in Figure 8 and Figure 9, the difference of the desk in the present embodiment and the desk in embodiment one exists In, the lifting position in the present embodiment in the side close to bottom plate 500, and in embodiment one on by position close to gear-box 140 side.

A kind of bi-motor three-tube type liftable desk that the utility model is provided, passes through Double Motor Control box 300 first The motor positioned at the both sides of bracket 100 is opened, and is acted on by gear train 212 on screw rod 414 so that the screw rod of the left and right sides 414 synchronous rotaries, when motor is rotated forward, the second column 412 or the 3rd column 413 in lifting assembly 410 rise so that Relative displacement between bracket 100 and bottom plate 500 becomes big；When motor reversal, the second column 412 in lifting assembly 410 or 3rd column 413 declines so that the relative displacement between bracket 100 and bottom plate 500 diminishes, until the first locating convex block 412i with First detent 411d phase clampings, the first positioning convex point 412j is nested with the first positioning hole 411c, stops the second column 412 Motion；Second locating convex block 413f and the second detent 412f phase clampings, the second positioning convex point and the second positioning hole 412e It is nested, stops the motion of the 3rd column 413.

A kind of bi-motor three-tube type liftable desk that the utility model is provided, passes through Dual-motors Driving twin-screw 414 Run simultaneously so that the synchronous rise and fall of both sides lifting assembly 410 of desk, lifting assembly 410 includes three phases in addition Mutually nested column, realizes secondary transmission so that changing the adjustable height of desk becomes more precisely and reliable.

As shown in Figure 10, the circuit of Double Motor Control box 300 includes：Central processing unit 310, includes the first chip, power supply Circuit 320, motor feedback circuit 330, key circuit 340, motor-drive circuit 350.

Power circuit 320 is connected with central processing unit 310；Key circuit 340 is connected to the input of central processing unit 310, Central processing unit 310 receives the signal from key circuit 340, and received signal is handled；Motor driving electricity Road 350 is connected to the output end of central processing unit 310, and motor-drive circuit 350 receives the letter after the processing of central processing unit 310 Number, and according to the working condition of the signal control motor motor received；Meanwhile, motor-drive circuit 350, which exports motor, to be believed Number send to motor feedback circuit 330, motor feedback circuit 330 is connected to central processing unit 310.

As shown in figure 11, the first chip model is ATMEGA16A.

As shown in figure 12, the power circuit 320 includes：Second chip IC 2, the model 34063 of the second chip IC 2, The first plug piezo-resistance of CN1, the 3rd plug CN3, first ZNR1, the first electric capacity C1, the second electric capacity C2, the 3rd electric capacity C3, the The four electric capacity electrochemical capacitor of C4, the 5th electric capacity C5, the 6th electric capacity C6, the 7th electric capacity C7, first E1, the second electrochemical capacitor E2, the 3rd Electrochemical capacitor E3, the 4th electrochemical capacitor E4, the 5th electrochemical capacitor E5, the 6th electrochemical capacitor E6, the 3rd diode D3, the four or two pole Pipe D4, the 5th diode D5, the 6th diode D6, the 7th diode D7, the 13rd diode D13, first resistor R1, the second electricity Hinder R2,3rd resistor R3, the 4th resistance R4, the 9th resistance R9, the tenth resistance R10, the 13rd resistance R13, the 14th resistance The voltage-regulator diode of R14, the 26th resistance R26, the 30th resistance R30, first ZD1, the first inductance L1, the first light emitting diode LED1, the 4th metal-oxide-semiconductor Q4, the 3rd triode Q3, the 5th triode Q5, first adjustable resistance TR1, buzzer BUZ.

The specific connection of power circuit 320 is：First plug CN1 first ports be grounded, second port be connected to by First piezo-resistance ZNR1, one end of the first parallel branch of the first electric capacity C1, the first electrochemical capacitor E1 composition, first parallel connection Branch road is provided with a ground path, and the first parallel branch other end is connected to the 3rd diode D3 positive poles；3rd diode D3 Negative pole is connected to by the second electric capacity C2, the 3rd electrochemical capacitor E3, second resistance R2, the 3rd electric capacity C3, first voltage-regulator diode ZD1 Second parallel branch of composition, wherein, first resistor R1 is connected in series between the 3rd electrochemical capacitor E3 and second resistance R2, the Two parallel branches are provided with a ground path；3rd diode D3 negative poles are additionally coupled to by the second electrochemical capacitor E2, the 4th electric capacity 3rd parallel branch of C4 compositions, the 3rd parallel branch is provided with a ground path；The 3rd parallel branch other end is via an electricity Resistance is connected to the 7th pin of the second chip IC 2；First pin of the second chip IC 2 is connected to the of the second chip IC 2 simultaneously Seven pins and the 8th pin；The second pin of second chip IC 2 is connected to by the electricity of the 4th diode D4, the 6th electric capacity C6, the 5th The 4th parallel branch of electric capacity E5 compositions is solved, wherein, the first inductance L1 is in series between the 4th diode D4 and the 6th electric capacity C6, 4th parallel branch is provided with a ground path；3rd pin of the second chip IC 2 is connected to the 4th simultaneously via the 5th electric capacity C5 Join the ground path of branch road；The 4th pin ground connection of second chip IC 2；The other end of 4th parallel branch is via 3rd resistor R3 The 5th pin of the second chip IC 2 is connected to, while the 5th pin is grounded via the 4th resistance R4；4th parallel branch it is another End is further connected to the 5th diode D5, the 6th diode D6, the 7th diode D7 positive pole；5th diode D5 negative poles connect The 3rd plug CN3 first port is connected to, the 3rd plug CN3 second ports are grounded, and the ports of the 3rd plug CN3 the 3rd connect the first core Piece IC1 the 26th pin, first port is also connected to the first LED 1, first via the 30th resistance R30 The other end of LED 1 is grounded, and the 26th is connected between the 30th resistance R30 and the first LED 1 9th pin of resistance R26, the 26th resistance R26 the first chip ICs 1 of another termination；7th diode D7 negative poles are respectively with 13 resistance R13 and the 4th metal-oxide-semiconductor Q4 drain electrode connection, the 4th metal-oxide-semiconductor Q4 grid and the 13rd resistance R13 are connected in parallel To the 5th triode Q5 colelctor electrode, the 5th triode Q5 grounded emitter, the 5th triode Q5 base stage is connected to the tenth Vacant after four resistance R14, the 4th metal-oxide-semiconductor Q4 source electrode is connected to what is be made up of the 6th electrochemical capacitor E6 and the 15th electric capacity C15 5th parallel branch, the 5th parallel branch is provided with a ground path, and the other end of the 5th parallel branch is via the first adjustable electric Power vd D is connected to after resistance TR1；6th diode D6 negative poles are connected to what is be made up of the 4th electrochemical capacitor E4 and the 7th electric capacity C7 6th parallel branch, the 6th parallel branch is provided with a ground path, and the 6th parallel branch other end connects via the 9th resistance R9 It is connected to the 7th parallel branch being made up of the 13rd diode D13 and buzzer BUZ, the 7th parallel branch other end is connected to the Three triode Q3 colelctor electrode, the 3rd triode Q3 grounded emitter, the 3rd triode Q3 base stage is via the tenth resistance R10 It is connected to the 31st pin of the first chip IC 1.

As shown in figure 13, the motor feedback circuit 330 includes：31st resistance R31, the 32nd resistance R32, the 3rd 13 resistance R33, the 34th resistance R34, the 35th resistance R35, the 36th resistance R36, the 37th resistance R37, 38th resistance R38, the 39th resistance R39, the 40th resistance R40, the 41st resistance R41, the 42nd resistance R42, the 9th electric capacity C9, the tenth electric capacity C10, the 11st electric capacity C11, the 12nd electric capacity C12.

The specific connection of motor feedback circuit 330 is：36th resistance R36, the 31st resistance R31, the 3rd 15 resistance R35 one end end points connection altogether, the 36th resistance R36 other end is connected to power supply VCC, the 31st resistance The R31 other end is connected to the 43rd pin of the first chip IC 1, and the 35th resistance R35 other end is via the 12nd Electric capacity C12 is in parallel with the 31st resistance R31；37th resistance R37, the 32nd resistance R32, the 38th resistance R38 One end end points connection altogether, the 37th resistance R37 other end is connected to power supply VCC, and the 32nd resistance R32 other end connects The 42nd pin of the first chip IC 1 is connected to, the 38th resistance R38 other end is via the 11st electric capacity C11 and the 3rd 12 resistance R32 are in parallel；The end points connection altogether of the resistance R39 one end of 40th resistance R40, the 33rd resistance R33, the 39th, The 40th resistance R40 other end is connected to power supply VCC, and the 33rd resistance R33 other end is connected to the first chip IC 1 41st pin, the 39th resistance R39 other end is in parallel with the 33rd resistance R33 via the tenth electric capacity C10；4th 11 resistance R41, the 34th resistance R34, the end points connection altogether of the 42nd resistance R42 one end, the 41st resistance R41's is another One end is connected to power supply VCC, and the other end of the 34th resistance R34 is connected to the 40th pin of the first chip IC 1, the 40th The two resistance R42 other end is in parallel with the 34th resistance R34 via the 9th electric capacity C9.

As shown in figure 14, the key circuit 340 includes：23rd resistance R23, the 24th resistance R24, the 27th The two-way TVS diode T1 of resistance R27, the 28th resistance R28, the 29th resistance R29, first, the second two-way TVS diode T2, the 3rd two-way TVS diode T3, first switch SW1, second switch SW2, the 3rd switch SW3, the 16th electric capacity C16, the tenth Seven electric capacity C17, the 18th electric capacity C18, the 6th triode Q6.

The specific connection of key circuit 340 is：Key circuit 340 is provided with four output ends, the first key circuit 340 Output end, the output end of the second key circuit 340, the output end of the 3rd key circuit 340, WAKE output ends, wherein the first button is electric The output end of road 340 is connected to the 12nd pin of the first chip IC 1, and the output end of the second key circuit 340 is connected to the first chip IC1 the tenth pin, the output end of the 3rd key circuit 340 is connected to the 11st pin of the first chip IC 1, and WAKE output ends connect It is connected to the 26th pin of the first chip IC 1；The output end of first key circuit 340 is connected to the 3rd two-way TVS diode T3 One end, be connected with the 16th electric capacity C16 and the 27th resistance R27 on the circuit, the 16th electric capacity C16 other ends ground connection, The 27th resistance R27 other ends are connected to power supply VCC, and the 3rd two-way TVS diode T3 is provided with the first switch of a ground connection SW1；The output end of second key circuit 340 is connected on the first two-way TVS diode T1 one end, the circuit and is connected with the 18th Electric capacity C18 and the 29th resistance R29, the 18th electric capacity C18 other ends ground connection, the 29th resistance R29 other ends are connected to Power supply VCC, the first two-way TVS diode T1 are provided with the second switch SW2 of a ground connection；The output end of 3rd key circuit 340 connects It is connected on the second two-way TVS diode T2 one end, the circuit and is connected with the 17th electric capacity C17 and the 28th resistance R28, the The 17 electric capacity C17 other ends are grounded, and the 28th resistance R28 other ends are connected to power supply VCC, the second two-way TVS diode T2 The 3rd switch SW3 provided with a ground connection；WAKE output ends after the 24th resistance R24 via being connected to the 6th triode Q6's The 23rd resistance R23 is connected with base stage, the circuit, the 23rd resistance R23 other end is grounded, the 6th triode Q6's Emitter is grounded；6th triode Q6 colelctor electrode and the first two-way TVS diode T1, the second two-way TVS diode T2, the 3rd The two-way TVS diode T3 other end is to be connected in parallel.

As shown in Figure 15, Figure 16, the motor-drive circuit 350 includes：3rd chip IC 3, the model of the 3rd chip IC 3 For the voltage-regulator diode of ULN2003, the 19th electric capacity C19, the 20th electric capacity C20, second ZD2, the 3rd voltage-regulator diode ZD3 the 5th Resistance R5, the 6th resistance R6, the 7th resistance R7, the 8th resistance R8, the 11st resistance R11, the 12nd resistance R12, the first metal-oxide-semiconductor Q1, the second metal-oxide-semiconductor Q2, the first diode D1, the second diode D2, the 9th diode D9, the tenth diode D10, the 11st The pole pipe relay of D11, the 12nd diode D12, first RL1, the second relay RL2, the 3rd relay RL3, the 4th relay RL4, the second piezo-resistance ZNR2, the 3rd piezo-resistance ZNR3.

The specific connection of motor-drive circuit 350 is：4th pin of the 3rd chip IC 3 and the first chip IC 1 37th pin is connected；5th pin of the 3rd chip IC 3 is connected with the 36th pin of the first chip IC 1；3rd core Piece IC3 the 6th pin is connected with the 35th pin of the first chip IC 1；The 7th pin and the first core of 3rd chip IC 3 Piece IC1 the 34th pin connection；Motor-drive circuit 350 is provided with four output ends, the first motor drive output, PWM1 Output end, the second motor drive output, PWM2 output ends；Wherein the first motor drive output is connected to the of the first chip 33 pins, PWM1 output ends are connected to the 13rd pin of the first chip IC 1, and the second motor drive output is connected to 32nd pin of one chip, PWM2 output ends are connected to the 14th pin of the first chip IC 1；The driving output of first motor End is connected to the 6th resistance R6, and the 19th electric capacity C19 and the second voltage-regulator diode ZD2, the 19th electric capacity are connected with the circuit C19 and the second voltage-regulator diode ZD2 other end earth；The 6th resistance R6 other ends are connected to the first metal-oxide-semiconductor Q1 source Pole, is provided with a grounding resistance between the 6th resistance R6 and the first metal-oxide-semiconductor Q1；First metal-oxide-semiconductor Q1 grid is via the 12nd electricity Resistance R12 is connected to PWM1 output ends, and the 5th resistance R5, the 5th resistance R5 other end ground connection are connected with this circuit；First MOS Pipe Q1 drain circuit also connects respectively via a 24V power supplys, the first metal-oxide-semiconductor Q1 drain circuit is connected to after the first diode D1 It is connected to the first relay RL1 and the second relay RL2 normally-closed contact end；First relay RL1 normally opened contact end is connected to 24V power supplys, the first relay RL1 coiler part is connected with the 9th diode D9, and the 9th diode D9 negative pole circuits are connected to One 24V power supplys, the 9th diode D9 positive pole circuits are connected to the 11st pin of the 3rd chip IC 3；Second relay RL2's is normal Open tip side and be connected to 24V power supplys, the second relay RL2 coiler part is connected with the tenth diode D10, the tenth diode D10 negative pole circuits are connected to a 24V power supplys, and the tenth diode D10 positive pole circuits are connected to the 13rd of the 3rd chip IC 3 and drawn Pin；First relay RL1 armature end is connected to electric motor positive pole, and the second relay RL2 armature end is connected to motor horse Up to negative pole, the second piezo-resistance ZNR2 is connected between the first relay RL1 and the second relay RL2 armature end line；The Two motor drive outputs are connected to the 8th resistance R8, and the 20th electric capacity C20 and the 3rd voltage-regulator diode are connected with the circuit ZD3, the 20th electric capacity C20 and the 3rd voltage-regulator diode ZD3 other end earth；The 8th resistance R8 other ends are connected to Two metal-oxide-semiconductor Q2 source electrode, is provided with a grounding resistance between the 8th resistance R8 and the second metal-oxide-semiconductor Q2；Second metal-oxide-semiconductor Q2 grid PWM1 output ends are connected to via the 11st resistance R11, the 7th resistance R7, the 7th resistance R7 other end are connected with this circuit Ground connection；Second metal-oxide-semiconductor Q2 drain circuit is via being connected to a 24V power supplys, the second metal-oxide-semiconductor Q2 drain electrode after the second diode D2 Circuit is further connected to the 3rd relay RL3 and the 4th relay RL4 normally-closed contact end；3rd relay RL3's is normally opened Tip side is connected to 24V power supplys, and the 3rd relay RL3 coiler part is connected with the 11st diode D11, the 11st diode D11 negative pole circuits are connected to a 24V power supplys, and the 11st diode D11 positive pole circuits are connected to the tenth of the 3rd chip IC 3 and drawn Pin；4th relay RL4 normally opened contact end is connected to 24V power supplys, the 4th relay RL4 coiler part and the 12nd pole Pipe D12 connects, and the 12nd diode D12 negative pole circuits are connected to a 24V power supplys, the 12nd diode D12 positive pole connections To the 12nd pin of the 3rd chip IC 3；3rd relay RL3 armature end is connected to electric motor positive pole, the 4th relay RL4 armature end is connected to electric motor negative pole, connects between the 3rd relay RL3 and the 4th relay RL4 armature end line It is connected to the 3rd piezo-resistance ZNR3.

The electric lifting system power consumption of Double Motor Control box line road control is relatively low, and less, system work limitation rate height is lost, Speed is fast, and system is stable.

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

Claims (9)

1. a kind of bi-motor three-tube type liftable desk, it is characterised in that including：

Bracket, including first crossbeam, two the second horizontal strokes that are nested with the first crossbeam that two or so side by side parallel are set Beam, and the symmetrical supporting plate for being connected to two first crossbeam two ends, wherein, it is provided with a tooth on the every first crossbeam Roller box；

Transmission mechanism, including two transmission components being respectively arranged in the gear-box；

Double Motor Control box, is installed on the second cross beam, and between two gear-boxes；

Elevating mechanism, including two lifting assemblies for being symmetricly set in the bracket two ends, wherein, one end of the lifting assembly It is connected with the side of the gear-box；

Two bottom plates, respectively the other end with the lifting assembly be connected；

Also include the Double Motor Control box line road for being used to control the elevating mechanism, the Double Motor Control box line road includes center Processor, the first chip comprising model ATMEGA16A, power circuit, key circuit, motor-drive circuit, motor feedback Circuit；Power circuit is connected with central processing unit；Key circuit is connected to central processing unit input, and central processing unit, which is received, to be come Handled from the signal of key circuit, and to received signal；Motor-drive circuit is connected to central processing unit output End, motor-drive circuit receives the signal after central processing unit is handled, and according to the signal control motor motor received Working condition；Meanwhile, motor-drive circuit sends motor output signal to motor feedback circuit, the connection of motor feedback circuit To central processing unit；

The lifting assembly includes：

Three mutually nested the first column, the second column and the 3rd columns successively；

Screw rod, is nested in the 3rd column, and one end of the screw rod is connected with the gear train in the transmission component, institute The other end for stating screw rod is connected with first column；

Fixed cover, is located on the screw rod, and is mutually fixed by axle sleeve.

2. a kind of bi-motor three-tube type liftable desk according to claim 1, it is characterised in that second column Including：

Second fall way；

First fastener, is nested in one end of second fall way, and positioned at the outside of second fall way；

Positioning sleeve, is nested in the other end of second fall way, and on the inside of second fall way, and along the positioning The thickness direction of set offers the through hole being engaged with fixed cover；

Several first connection sheets, set along the outside circular array for second fall way for being nested with described positioning sleeve one end Put；

3rd column includes：

3rd fall way；

Second fastener, is nested in one end of the 3rd fall way；

Several second connection sheets, circular array is arranged at the other end of the 3rd fall way；

Wherein, the structure of second connection sheet is identical with the described first connection chip architecture.

3. a kind of bi-motor three-tube type liftable desk according to claim 2, it is characterised in that first column On the first positioning hole it is corresponding with the first positioning convex point on first fastener；The first positioning on first column is recessed Groove is corresponding with the first locating convex block on first fastener；The second positioning hole and the described second card on second column The second positioning convex point on part is corresponding；The second detent on second column is determined with second on second fastener Position salient point is corresponding；Wherein, the equal trimming in the side of the first positioning convex point and the side of the second positioning convex point.

4. a kind of bi-motor three-tube type liftable desk according to claim 2, it is characterised in that second column On connecting hole it is corresponding with the connecting hole on the connecting hole on the positioning sleeve and first connection sheet respectively；Described second Positioning hole on column is corresponding with the locating dowel on the positioning hole on the positioning sleeve and first connection sheet respectively；It is described Locating dowel on positioning sleeve is corresponding with the positioning hole on first column.

5. a kind of bi-motor three-tube type liftable desk according to claim 1, it is characterised in that in the bottom plate Portion is set in hollow form, and several square slotted eyes are offered in a word along the length direction of the bottom surface of the bottom plate；The two of bottom plate End is symmetrically each provided with a lower margin, and the lower margin is detachably connected with bottom plate.

6. a kind of bi-motor three-tube type liftable desk according to claim 1, it is characterised in that the power circuit Including：Second chip IC 2, the model 34063 of the second chip IC 2, the first plug CN1, the 3rd plug CN3, first is pressure-sensitive Resistance ZNR1, the first electric capacity C1, the second electric capacity C2, the 3rd electric capacity C3, the 4th electric capacity C4, the 5th electric capacity C5, the 6th electric capacity C6, the Seven electric capacity C7, the first electrochemical capacitor E1, the second electrochemical capacitor E2, the 3rd electrochemical capacitor E3, the 4th electrochemical capacitor E4, the 5th electrolysis Electric capacity E5, the 6th electrochemical capacitor E6, the 3rd diode D3, the 4th diode D4, the 5th diode D5, the 6th diode D6, the Seven diode D7, the 13rd diode D13, first resistor R1, second resistance R2,3rd resistor R3, the 4th resistance R4, the 9th electricity Hinder R9, the tenth resistance R10, the 13rd resistance R13, the 14th resistance R14, the 26th resistance R26, the 30th resistance R30, the One voltage-regulator diode ZD1, the first inductance L1, the first LED 1, the 4th metal-oxide-semiconductor Q4, the 3rd triode Q3, the five or three Pole pipe Q5, the first adjustable resistance TR1, buzzer BUZ；

The specific connection of power circuit is：

First plug CN1 first ports are grounded, and second port is connected to by the first piezo-resistance ZNR1, the first electric capacity C1, first One end of first parallel branch of electrochemical capacitor E1 compositions, first parallel branch is provided with a ground path, first parallel connection The branch road other end is connected to the 3rd diode D3 positive poles；

3rd diode D3 negative poles are connected to by the second electric capacity C2, the 3rd electrochemical capacitor E3, second resistance R2, the 3rd electric capacity C3, Second parallel branch of the first voltage-regulator diode ZD1 compositions, wherein, the company of series connection between the 3rd electrochemical capacitor E3 and second resistance R2 First resistor R1 is connected to, the second parallel branch is provided with a ground path；

3rd diode D3 negative poles are additionally coupled to by the second electrochemical capacitor E2, the 3rd parallel branch of the 4th electric capacity C4 compositions, the Three parallel branches are provided with a ground path；

The 3rd parallel branch other end is connected to the 7th pin of the second chip IC 2 via a resistance；

First pin of the second chip IC 2 is connected to the 7th pin and the 8th pin of the second chip IC 2 simultaneously；

The second pin of second chip IC 2 is connected to by the 4th diode D4, the 6th electric capacity C6, the 5th electrochemical capacitor E5 compositions 4th parallel branch, wherein, it is in series between the 4th diode D4 and the 6th electric capacity C6 in the first inductance L1, the 4th parallel branch Provided with a ground path；

3rd pin of the second chip IC 2 is connected to the ground path of the 4th parallel branch via the 5th electric capacity C5；

The 4th pin ground connection of second chip IC 2；

The other end of 4th parallel branch is connected to the 5th pin of the second chip IC 2 via 3rd resistor R3, while the 5th draws Pin is grounded via the 4th resistance R4；

The other end of 4th parallel branch is further connected to the 5th diode D5, the 6th diode D6, the 7th diode D7's Positive pole；

5th diode D5 negative poles are connected to the 3rd plug CN3 first port, the 3rd plug CN3 second ports ground connection, the 3rd The ports of plug CN3 the 3rd connect the 26th pin of the first chip IC 1, and first port is also connected to via the 30th resistance R30 First LED 1, the other end of the first LED 1 ground connection, the 30th resistance R30 and the first light emitting diode The 26th resistance R26, the 9th pin of the 26th resistance R26 the first chip ICs 1 of another termination are connected between LED1；

Drain electrode of the 7th diode D7 negative poles respectively with the 13rd resistance R13 and the 4th metal-oxide-semiconductor Q4 is connected, the 4th metal-oxide-semiconductor Q4 Grid and the 13rd resistance R13 be connected in parallel to the 5th triode Q5 colelctor electrode, the 5th triode Q5 grounded emitter, 5th triode Q5 base stage is connected to vacant after the 14th resistance R14, and the 4th metal-oxide-semiconductor Q4 source electrode is connected to by the 6th electrolysis 5th parallel branch of electric capacity E6 and the 15th electric capacity C15 compositions, the 5th parallel branch is provided with a ground path, and the 5th is in parallel The other end of branch road after the first adjustable resistance TR1 via being connected to power vd D；

6th diode D6 negative poles are connected to the 6th parallel branch being made up of the 4th electrochemical capacitor E4 and the 7th electric capacity C7, the 6th Parallel branch is provided with a ground path, and the 6th parallel branch other end is connected to by the 13rd diode via the 9th resistance R9 The 7th parallel branch that D13 and buzzer BUZ is constituted, the 7th parallel branch other end is connected to the 3rd triode Q3 current collection Pole, the 3rd triode Q3 grounded emitter, the 3rd triode Q3 base stage is connected to the first chip via the tenth resistance R10 IC1 the 31st pin.

7. a kind of bi-motor three-tube type liftable desk according to claim 1, it is characterised in that the motor feedback Circuit includes：

31st resistance R31, the 32nd resistance R32, the 33rd resistance R33, the 34th resistance R34, the 35th Resistance R35, the 36th resistance R36, the 37th resistance R37, the 38th resistance R38, the 39th resistance R39, the 4th Ten resistance R40, the 41st resistance R41, the 42nd resistance R42, the 9th electric capacity C9, the tenth electric capacity C10, the 11st electric capacity C11, the 12nd electric capacity C12；

The specific connection of motor feedback circuit is：

The end points connection altogether of the resistance R35 one end of 36th resistance R36, the 31st resistance R31, the 35th, the 36th electricity The resistance R36 other end is connected to power supply VCC, and the 31st resistance R31 other end is connected to the 43rd of the first chip IC 1 the Pin, the 35th resistance R35 other end is in parallel with the 31st resistance R31 via the 12nd electric capacity C12；

The end points connection altogether of the resistance R38 one end of 37th resistance R37, the 32nd resistance R32, the 38th, the 37th electricity The resistance R37 other end is connected to power supply VCC, and the 32nd resistance R32 other end is connected to the 42nd of the first chip IC 1 the Pin, the 38th resistance R38 other end is in parallel with the 32nd resistance R32 via the 11st electric capacity C11；

The end points connection, the 40th resistance R40 altogether of the resistance R39 one end of 40th resistance R40, the 33rd resistance R33, the 39th The other end be connected to power supply VCC, the 33rd resistance R33 other end is connected to the 41st pin of the first chip IC 1, The 39th resistance R39 other end is in parallel with the 33rd resistance R33 via the tenth electric capacity C10；

41st resistance R41, the 34th resistance R34, the end points connection altogether of the 42nd resistance R42 one end, the 41st electricity The resistance R41 other end is connected to power supply VCC, and the other end of the 34th resistance R34 is connected to the 40th of the first chip IC 1 and drawn Pin, the 42nd resistance R42 other end is in parallel with the 34th resistance R34 via the 9th electric capacity C9.

8. a kind of bi-motor three-tube type liftable desk according to claim 1, it is characterised in that the key circuit Including：

23rd resistance R23, the 24th resistance R24, the 27th resistance R27, the 28th resistance R28, the 29th Resistance R29, the first two-way TVS diode T1, the second two-way TVS diode T2, the 3rd two-way TVS diode T3, first switch SW1, second switch SW2, the 3rd switch SW3, the 16th electric capacity C16, the 17th electric capacity C17, the 18th electric capacity C18, the six or three Pole pipe Q6；

The specific connection of key circuit is：

Key circuit is provided with four output ends, the first key circuit output end, the second key circuit output end, the 3rd key circuit Output end, WAKE output ends, wherein the first key circuit output end is connected to the 12nd pin of the first chip IC 1, second presses Key circuit output end is connected to the tenth pin of the first chip IC 1, and the 3rd key circuit output end is connected to the first chip IC 1 11st pin, WAKE output ends are connected to the 26th pin of the first chip IC 1；

First key circuit output end, which is connected on the 3rd two-way TVS diode T3 one end, the circuit, is connected with the 16th electricity Hold C16 and the 27th resistance R27, the 16th electric capacity C16 other ends ground connection, the 27th resistance R27 other ends are connected to electricity Source VCC, the 3rd two-way TVS diode T3 are provided with the first switch SW1 of a ground connection；

Second key circuit output end, which is connected on the first two-way TVS diode T1 one end, the circuit, is connected with the 18th electricity Hold C18 and the 29th resistance R29, the 18th electric capacity C18 other ends ground connection, the 29th resistance R29 other ends are connected to electricity Source VCC, the first two-way TVS diode T1 are provided with the second switch SW2 of a ground connection；

3rd key circuit output end, which is connected on the second two-way TVS diode T2 one end, the circuit, is connected with the 17th electricity Hold C17 and the 28th resistance R28, the 17th electric capacity C17 other ends ground connection, the 28th resistance R28 other ends are connected to electricity The 3rd switch SW3 of source VCC, the second two-way TVS diode T2 provided with a ground connection；

WAKE output ends are connected with via the base stage that the 6th triode Q6 is connected to after the 24th resistance R24 on the circuit 23 resistance R23, the 23rd resistance R23 other end ground connection, the 6th triode Q6 emitter ground connection；

6th triode Q6 colelctor electrode and the first two-way TVS diode T1, the second two-way TVS diode T2, the 3rd two-way TVS The diode T3 other end is to be connected in parallel.

9. a kind of bi-motor three-tube type liftable desk according to claim 1, it is characterised in that the motor driving Circuit includes：

3rd chip IC 3, the model ULN2003 of the 3rd chip IC 3, the 19th electric capacity C19, the 20th electric capacity C20, second Voltage-regulator diode ZD2, the 3rd voltage-regulator diode ZD3 the 5th resistance R5, the 6th resistance R6, the 7th resistance R7, the 8th resistance R8, the 11 resistance R11, the 12nd resistance R12,

First metal-oxide-semiconductor Q1, the second metal-oxide-semiconductor Q2, the first diode D1, the second diode D2, the 9th diode D9, the tenth diode The relay of D10, the 11st diode D11, the 12nd diode D12, first RL1, the second relay RL2, the 3rd relay The piezo-resistance of RL3, the 4th relay RL4, second ZNR2, the 3rd piezo-resistance ZNR3；

The specific connection of motor-drive circuit is：

4th pin of the 3rd chip IC 3 is connected with the 37th pin of the first chip IC 1；

5th pin of the 3rd chip IC 3 is connected with the 36th pin of the first chip IC 1；

6th pin of the 3rd chip IC 3 is connected with the 35th pin of the first chip IC 1；

7th pin of the 3rd chip IC 3 is connected with the 34th pin of the first chip IC 1；

Motor-drive circuit is provided with four output ends, the first motor drive output, PWM1 output ends, the driving output of the second motor End, PWM2 output ends；Wherein the first motor drive output is connected to the 33rd pin of the first chip, and PWM1 output ends connect The 13rd pin of the first chip IC 1 is connected to, the second motor drive output is connected to the 32nd pin of the first chip, PWM2 output ends are connected to the 14th pin of the first chip IC 1；

First motor drive output is connected to the 6th resistance R6, and the 19th electric capacity C19 and the second voltage stabilizing are connected with the circuit Diode ZD2, the 19th electric capacity C19 and the second voltage-regulator diode ZD2 other end earth；The 6th resistance R6 other ends connect The first metal-oxide-semiconductor Q1 source electrode is connected to, a grounding resistance is provided between the 6th resistance R6 and the first metal-oxide-semiconductor Q1；

First metal-oxide-semiconductor Q1 grid is connected to PWM1 output ends via the 12nd resistance R12, and the 5th resistance is connected with this circuit R5, the 5th resistance R5 other end ground connection；

First metal-oxide-semiconductor Q1 drain circuit is via being connected to a 24V power supplys, the first metal-oxide-semiconductor Q1 drain electrode after the first diode D1 Circuit is further connected to the first relay RL1 and the second relay RL2 normally-closed contact end；

First relay RL1 normally opened contact end is connected to 24V power supplys, the first relay RL1 coiler part and the 9th 2 pole Pipe D9 connects, and the 9th diode D9 negative pole circuits are connected to a 24V power supplys, and the 9th diode D9 positive pole circuits are connected to the 3rd core Piece IC3 the 11st pin；

Second relay RL2 normally opened contact end is connected to 24V power supplys, the second relay RL2 coiler part and the 12nd pole Pipe D10 connects, and the tenth diode D10 negative pole circuits are connected to a 24V power supplys, and the tenth diode D10 positive pole circuits are connected to the 13rd pin of three chip ICs 3；

First relay RL1 armature end is connected to electric motor positive pole, and the second relay RL2 armature end is connected to motor horse Up to negative pole, the second piezo-resistance ZNR2 is connected between the first relay RL1 and the second relay RL2 armature end line；

Second motor drive output is connected to the 8th resistance R8, and the 20th electric capacity C20 and the 3rd voltage stabilizing are connected with the circuit Diode ZD3, the 20th electric capacity C20 and the 3rd voltage-regulator diode ZD3 other end earth；The 8th resistance R8 other ends connect The second metal-oxide-semiconductor Q2 source electrode is connected to, a grounding resistance is provided between the 8th resistance R8 and the second metal-oxide-semiconductor Q2；

Second metal-oxide-semiconductor Q2 grid is connected to PWM1 output ends via the 11st resistance R11, and the 7th resistance is connected with this circuit R7, the 7th resistance R7 other end ground connection；

Second metal-oxide-semiconductor Q2 drain circuit is via being connected to a 24V power supplys, the second metal-oxide-semiconductor Q2 drain electrode after the second diode D2 Circuit is further connected to the 3rd relay RL3 and the 4th relay RL4 normally-closed contact end；

3rd relay RL3 normally opened contact end is connected to 24V power supplys, the 3rd relay RL3 coiler part and the 11st Pole pipe D11 connects, and the 11st diode D11 negative pole circuits are connected to a 24V power supplys, and the 11st diode D11 positive poles circuit connects It is connected to the tenth pin of the 3rd chip IC 3；

4th relay RL4 normally opened contact end is connected to 24V power supplys, the 4th relay RL4 coiler part and the 12nd Pole pipe D12 connects, and the 12nd diode D12 negative pole circuits are connected to a 24V power supplys, and the 12nd diode D12 positive poles circuit connects It is connected to the 12nd pin of the 3rd chip IC 3；

3rd relay RL3 armature end is connected to electric motor positive pole, and the 4th relay RL4 armature end is connected to motor horse Up to negative pole, the 3rd piezo-resistance ZNR3 is connected between the 3rd relay RL3 and the 4th relay RL4 armature end line.