Background technology
At present, electric motor car mainly comprises electric bicycle, electro-tricycle, electric four-wheel vehicle, electric bicycle, electric shopping cart etc., and the electric motor car control appliance need have good waterproof, shockproof, heat dispersion as the control maincenter part of electric motor car.If poor sealing, the water inlet of electric motor car control appliance makes the components and parts short circuit of circuit board malfunctioning; If radiating effect is bad, the circuit board long-term work, temperature raises and surpasses the peak of components and parts, components and parts damage, thereby cause control appliance work undesired and even operate malfunctioning, for High-Powered Vehicles such as electric four-wheel vehicle, electric automobiles, because the power output of control appliance is big, caloric value is many, this moment is higher to the requirement of heat dispersion.
Modal control appliance shell mechanism is that shell is divided into groove and cover plate two parts on the market, the circuit board groove of packing into, again cover plate is covered, these two parts connect by screw, line outlet is directly exposed outside, this structure since up and down the junction leave the space, aqueous vapor is easy to enter in the cavity at circuit board place by this space, makes the components and parts short circuit of circuit board malfunctioning; Line outlet is exposed outside simultaneously, is unfavorable for waterproof.Also having a kind of on the market is the end cap that monobloc container adds two ends, the end cap of one side is reserved connector and is convenient to wiring, be placed with " U " type aluminum strip in the monobloc container simultaneously, two arms of " U " are used for the installation power pipe, and the bottom of " U " is used to lay circuit board, and this structure is given aluminum strip because heat has passed to earlier, pass by shell again, its heat dispersion is very poor, is unfavorable for guaranteeing the permanent operate as normal of control appliance, and its waterproof effect is also bad simultaneously.In a word, these versions of electric motor car control appliance of the prior art all can not solve the waterproof cooling problem preferably, and these waterproof cooling problems become the technical problem of the bottleneck of restriction electric motor car control appliance industry development.
Summary of the invention
The objective of the invention is to overcome the deficiencies in the prior art, provide a kind of sealing, water resistance is good, installation is firm, easy to maintenance, the electric motor car control appliance that helps power tube heat radiation.
The technical problem that the present invention solves takes following technical scheme to realize: a kind of electric motor car control appliance, comprise shell and circuit board, shell comprises loam cake and drain pan, circuit board is positioned between loam cake and the drain pan, the inner surface of drain pan is provided with a circle saddle, be used to hold circuit board, power tube on the circuit board be placed on circuit board below, the radiating surface of power tube is pressed on the upper surface of drain pan, be provided with cooling pad between the upper surface of drain pan and the power tube, be used to conduct the heat of described power tube, be provided with sealing gasket between circuit board and the loam cake, also be provided with pressing plate between sealing gasket and the loam cake, the connector that is threaded structure passes pressing plate successively, sealing gasket and circuit board screw on the described drain pan.
The technical problem that the present invention solves can also take following technical scheme to realize: described sealing gasket is expanded material EPDM; Power tube on the described circuit board be distributed in described circuit board screwing hole around; The lower surface of described loam cake is provided with the convex tendon that is used to push described sealing gasket; The outer rim of described drain pan upper surface also is provided with spacing preiection, is used to limit the outward flange of described sealing gasket; Recess is arranged in the position of the corresponding described power tube of described pressing plate, is used to increase the pressure that pressing plate presses down; One end of described loam cake is provided with cavity, and becomes epirelief cavity of resorption shape, and described cavity is used to place the straight cutting electric elements on the described circuit board; Described loam cake also is provided with the through hole that is used to lay outlet connector on the described circuit board, and the upper limb of described through hole is higher than all around, is used for waterproof; Described through hole is provided with waterproof cover, and the side away from described through hole on the described waterproof cover is provided with line outlet, is used to draw the line that connects connector; Described waterproof cover and the corresponding position of described loam cake are provided with alignment pin and location notch, are used for location and installation fast; The cavity of described loam cake and waterproof cover joint also are provided with guiding gutter.
The present invention compared with prior art has significant advantage and beneficial effect, is embodied in the following aspects:
1. shell adopts three-decker that control appliance is carried out the bilayer protection.Loam cake is arranged to an end even is become protruding chamber shape, and cavity can be used to prevent components and parts bigger on the circuit board, and smaller volume has on the whole been saved raw material.
2. between loam cake and the drain pan sealing gasket is set, can controls the sealing gasket decrement on the project organization, reduce the pressure of pressing plate to circuit board, the energy water-tight guarantees the permanent work of control appliance simultaneously.
The radiating surface of 3 power tubes on drain pan, is realized the direct heat radiation from drain pan by direct compacting, has guaranteed better heat radiating effect.
4. the through hole upper limb of laying connector of loam cake upper surface is arranged to higherly, can be used for dash, and adding design has guiding gutter, has effectively improved the control appliance water resistance.
5. upper cover design is original, not only has the installing and locating groove to be convenient to Fast Installation; And the waterproof cover line outlet is arranged on the side away from the through hole of loam cake, and also can effectively reduce the line outlet water inlet influences the probability that through hole goes out connector.
And the drain pan border have the reliability that anticreep projection guarantees sealing gasket work; The saddle of the inner surface of drain pan is used to hold circuit board, guarantees that the Fast Installation of circuit board puts in place.
Embodiment
Below in conjunction with accompanying drawing the embodiment of the invention is further described:
Shown in Fig. 1-8, the 1st, waterproof cover, the 2nd, screw hole, the 3rd, wire hole, the 4th, water fender, the 5th, loam cake, the 6th, sealing gasket, the 7th, circuit board, the 8th, drain pan, the 9th, the through hole of outlet connector, the 10th, screw hole, the 11st, screw hole, the 12nd, cooling pad, the 13rd, pressing plate, the 14th, connector, the 15th, screw hole, the 16th, cavity, the 17th, alignment pin, the 18th, guiding gutter, the 19th, convex tendon, the 20th, saddle, the 21st, spacing preiection, the 22nd, screw hole, the 23rd, location notch, the 24th, screw hole, the 25th, threaded connector, the 26th, power tube, the 27th, screw hole, the 28th, recess.
Electric motor car control appliance of the present invention, comprise loam cake 5 and drain pan 8, circuit board 7 is arranged between loam cake 5 and the drain pan 8, sealing gasket 6 is arranged between loam cake 5 and the circuit board 7, the upper surface of sealing gasket 6 and circuit board 7 closely cooperates, pressing plate 13 is arranged between loam cake 5 and the sealing gasket 6, the connector 25 that is threaded structure passes pressing plate 13, sealing gasket 6 and circuit board 7 successively, screw on the drain pan 8, so not only fixed the position of circuit board 7, power tube 26 on the circuit board 7 is pressed on the upper surface of drain pan 8, is beneficial to the heat radiation of power tube 26.
The upper surface of drain pan 8 and power tube 26 corresponding positions are provided with cooling pad 12, make power tube 26 be close to fully on the cooling pad 12 when the connector 25 that is threaded structure overstocks circuit board 7, make the heat of power tube 26 distribute faster.In order to make the connector 25 that is threaded structure can well bring into play squeezing action, power tube 26 generally be evenly distributed on circuit board 7 screwing holes around, make the downforce of the connector 25 that is threaded structure can be evenly distributed on each power tube.Position in pressing plate 13 and power tube 26 correspondences also is provided with recess 28, and the pressure that power tube 26 is subjected to increases, and radiating effect is better.
The lower surface of loam cake 5 is provided with the convex tendon 19 that is used to push described sealing gasket 6, the outward flange of convex tendon 19 is arranged to and the same shape of circuit board 7 outer rims, inner shape can be decided according to the distribution of circuit board element, so just make the components and parts and the external world in the circuit board 7 isolate, play good waterproof effect.
The inner surface of drain pan 8 is provided with a circle saddle 20, be used to hold circuit board 7, the outer rim of drain pan 8 upper surfaces also is provided with spacing preiection 21, is used to limit the outward flange of described sealing gasket 6, because the extruding of convex tendon 19, sealing gasket 6 will certainly if the dynamics of convex tendon 49 is excessive, will make sealing gasket 6 extend excessively to extending all around, thereby follow the string, have a strong impact on good waterproof effect, spacing preiection 21 can stop the excessively extension of sealing gasket 6, just can guarantee the elastic force of sealing gasket 6.
One end of loam cake 5 is provided with cavity 16, and one-tenth epirelief cavity of resorption shape, cavity 16 is mainly used in the bigger straight cutting electric elements of placing on the circuit board 7 14 of volume, so just the straight cutting components and parts 14 that do not need outlet can be distributed in the relative position of cavity 16, with cavity 16 it is covered then, the part of loam cake except cavity so both reached sealing function, also saved the space, because can be arranged to common planar to straight cutting components and parts 14; Loam cake also is provided with through hole 9, is mainly used in to lay the connector that has outlet on the circuit board, and the upper limb of through hole is higher than all around, if there is less water will be blocked in the outside like this, can not flow to 9 li of through holes, thereby destroy circuit board 7.
The relative position of loam cake 5 and drain pan 8 is provided with screw hole 15, screw hole 11, loam cake 5 and drain pan 8 can be undertaken fastening by screw, and screw hole 15, screw hole 11 all are arranged on the outside, like this when screwing in screw just not can and internal communication, improved good waterproof effect on the very big degree.
The present invention can also be provided with waterproof cover 1, operated by rotary motion plays further waterproof action to through hole 9 on through hole 9, also control appliance is beautified simultaneously, side away from through hole 9 on the waterproof cover 1 also is provided with line outlet 3, is used to draw the electric wire that connects connector.
The upper surface of loam cake 5 is provided with alignment pin 17, and the lower surface of waterproof cover 1 is provided with location notch 23, and the position of location notch 23 is relative with alignment pin 17, and waterproof cover 1 and loam cake 5 can be located fast by alignment pin 17 and location notch 23 and be installed.The cavity of loam cake 5 and waterproof cover 1 joint also are provided with guiding gutter 18, if control appliance drenches less water and will flow away along guiding gutter like this, and can not flow in the waterproof cover, have further improved the sealing of control appliance.
The relative position of loam cake and waterproof cover also is provided with screw hole 2, screw hole 10, and loam cake and waterproof cover can be undertaken fastening by screw.
Electric motor car control appliance of the present invention adopts tapping screw to improve reliability of products fully, has reduced to greatest extent, as the appearance of the defect ware that the hole trains off, human factor such as hitch error causes.Reduce subsequent machining cost simultaneously, improved production efficiency.
Referring to Fig. 1-8, assembling process of the present invention is:
At first cooling pad 6 is placed in the drain pan 8, then circuit board 7 is placed on the saddle 20, to allow during placement the radiating surface of power tube 26 is close on the cooling pad 12 on the circuit board 7, then sealing gasket 12 is placed on the circuit board 7, and allow its outer rim remain in the spacing preiection 21, then pressing plate 13 is placed on the sealing gasket 6, corresponding with the position of power tube 26, pass pressing plate 13 successively with the connector 25 that is threaded structure then, sealing gasket 6 and circuit board 7, screw on the drain pan 8, then loam cake 5 is placed on sealing gasket 6 above, convex tendon 20 is closely contacted with sealing gasket 6, and the connector 14 with not outlet is placed in the cavity 16 simultaneously, and the connector of outlet is placed in the through hole 9, line is drawn out to the outside of loam cake 5, carries out fastening from the lower surface of drain pan 8 to drain pan 8 and loam cake 5 with screw then.
Then waterproof cover 1 is placed on loam cake 5 above, allow alignment pin 17 and location notch 23 coincide, and electric wire extracted by wire hole 3, from the upper surface of waterproof cover 1 waterproof cover 1 and last 5 lids are carried out fasteningly at last with screw, so just finished whole assembling process of the present invention.
Utilize technical solutions according to the invention, or those skilled in the art designing the similar techniques scheme under the inspiration of technical solution of the present invention, and reach above-mentioned technique effect, all is to fall into protection scope of the present invention.