Electromagnetic fan clutch
Technical field
The present invention relates to a kind of electromagnetic fan clutch that is used for the motor car engine heat radiation.
Background technique
The fan clutch that is used for the motor car engine heat radiation in the existing technology includes silicone oil formula, electromagnetic type etc., and silicon oil filled fan clutch is temperature control, and stepless time adjustment just has the characteristics fuel-efficient, that fan noise is low, but its shortcoming is fragile, the easy inefficacy; Magnetic clutch is automatically controlled, can be divided into many grades of speed governing usually, and is fuel-efficient than conventional fan, and more reliable and more stable than silicon oil filled fan clutch, therefore increasing being applied in the motor car engine heat radiation.
The power of electromagnetic type fan clutch all is to be delivered to successively from back to front to drive the fan rotation on the free-ended fan fixed disk of front end in the existing technology; Volume on the axial direction is bigger; Center of gravity is away from the fixed position of rear end; Fan clutch is stable inadequately in operation process, and is bigger to the wearing and tearing of each counterpart.
In addition; The radiation fan of electromagnetic type fan clutch is installed in the magnetic clutch front end in the existing technology, and the radiation fan of silicone oil formula fan clutch is positioned at the position that clutch leans on the rear end, if want silicon oil filled fan clutch is replaced to electromagnetic fan clutch; Receive the narrow limitation of mounting point and distance; Need to change the positional structure of motor, this uses to the user and brings very big inconvenience, is unfavorable for realizing the seamless switching of electromagnetic fan clutch and silicon oil filled fan clutch.
Summary of the invention
The technical problem that the present invention will solve provides a kind of compact structure operation electromagnetic fan clutch more stably.
Electromagnetic fan clutch of the present invention; Comprise rotary main shaft, along main shaft axially from support end in free end is set with successively, be embedded coil electromagnetic core, can be around the driven disc of main axis rotation and the driving disc that can rotate with main shaft; Be provided with axially displaceable adhesive dish between said driving disc and the driven disc, said adhesive dish is connected through spring sheet with driving disc.
Electromagnetic fan clutch of the present invention, the excircle end face of wherein said driven disc is provided with first extension part to the electromagnetic core direction vertically, and said first extension part radially is positioned at the outside of electromagnetic core.
Electromagnetic fan clutch of the present invention, wherein said first extension part is provided with first skirt section near hanging down on the free-ended outer wall, is connected with fan on said first skirt section.
Electromagnetic fan clutch of the present invention wherein also is provided with dust cover, and said dust cover is sleeved on the main shaft, is positioned at the end of said electromagnetic core away from driven disc.
Electromagnetic fan clutch of the present invention wherein also is provided with the anti-rotation fixed block, and said anti-rotation fixed block one end is fixed in the outlet of coil on the electromagnetic core, and the other end of anti-rotation fixed block connects extension piece and is fixed on motor or the water pump.
Electromagnetic fan clutch of the present invention; Wherein also comprise a heat dissipation plate, said heat dissipation plate is fixed on the driving disc, and the excircle end face of said heat dissipation plate is provided with second extension part to the driven disc direction vertically; Said second extension part radially is positioned at the outside of driven disc first extension part; Hang down and be provided with second skirt section in the end of second extension part, second skirt section is mutually opposed with said first skirt section, and the magnet fixed disc that is embedded with magnet is set between first, second skirt section; Said magnet fixed disc is fixed on first skirt section, and position relative with magnet on said second skirt section is provided with soft iron.
Electromagnetic fan clutch of the present invention; Wherein also be provided with an adjustment bolt; Said heat dissipation plate is provided with the tapped through hole that matches with the screw rod of adjusting bolt; The tapped through hole that said screw rod passes heat dissipation plate is against on the adhesive dish, and the nut that matches with said adjustment bolt is resisted against on the exterior edge face of heat dissipation plate.
Electromagnetic fan clutch difference from prior art of the present invention is that electromagnetic fan clutch of the present invention is through being provided with the locations of structures of driving disc, adhesive dish and driven disc; Structure is compact more; Power, moves after the center of gravity by near the external transferring power acting of the driven disc of support end from being positioned at the free-ended driving disc of front end to being positioned at the driven disc transmission of rear end near support end; Make clutch more steady in operation process, reduce wearing and tearing each counterpart.
In the electromagnetic fan clutch of the present invention, first extension part to the electromagnetic core direction is set on driven disc, electromagnetic core is coated on wherein, overall structure is compact more, and center of gravity is moved after can be further; Fan is fixed on first skirt section; Position of fan is positioned at behind the clutch near support end; So; The electromagnetic clutch structure that forms can reach the purpose that need not to change the engine location structure with silicone oil formula fan clutch when the replacement, realizes seamless switching, and the front and back of position of fan are regulated the size that first extension part can be set according to actual needs and adjusted; Dust cover is set, matches, in bearing is coated on, prevent that sneaking into of dust foreign material from influencing the normal operation and the working life of bearing with electromagnetic core; The anti-rotation fixed block is set,, prevents it, cause the electric wire and the miscellaneous part interference of coil with main axis rotation with indirect being fixed on motor or the water pump of electromagnetic core; The further affixed heat dissipation plate that is provided with on driving disc, and on driven disc affixed magnet fixed disc, utilize magnet to produce the active force of foucault current to soft iron in the heat dissipation plate, drive fan differential low speed rotation, increase speed governing shelves, adapt to different radiating requirements; The adjustment bolt is set on heat dissipation plate, adhesive gap between adjustment adhesive dish and the driven disc, and when the clutch adhesive was lost efficacy, can the adhesive dish be locked on the driven disc through being screwed into screw rod, to guarantee that fan still can turn round.
Below in conjunction with accompanying drawing electromagnetic fan clutch of the present invention is described further.
Description of drawings
Fig. 1 is the main sectional view of electromagnetic fan clutch one speed of the present invention;
Fig. 2 is the main sectional view of electromagnetic fan clutch two speed of the present invention.
Embodiment
As shown in Figure 1; Electromagnetic fan clutch of the present invention comprise rotary main shaft 1, along main shaft 1 axially from support end in free end is set with successively, be embedded coil 5 electromagnetic core 3, can be around the driven disc 6 of main shaft 1 rotation and the driving disc 13 that can rotate with main shaft 1; Be provided with axially displaceable adhesive dish 10 between driving disc 13 and the driven disc 6, adhesive dish 10 and driving disc 13 are connected through spring sheet.
Driven disc 6 excircle end faces are provided with first extension part 14 to electromagnetic core 3 directions vertically; First extension part 14 radially is positioned at the outside of electromagnetic core 3; First extension part 14 is provided with first skirt section 11 near free-ended outer wall; First skirt section 11 is perpendicular to the outer wall of first extension part 14, affixed fan 19 on first skirt section 11.
Further, away from an end of driven disc 6 dust cover 2 is set at electromagnetic core 3, dust cover 2 is sleeved on the main shaft 1 to match with electromagnetic core 3 end faces bearing is coated on wherein.
Anti-rotation fixed block 4 further is set, and anti-rotation fixed block 4 one ends are fixed in the outlet of coil 5 on the electromagnetic core, and the other end connects extension piece and is fixed on motor or the water pump.
During work, under the low state of water temperature, coil 5 no electric circuits, electromagnetic core 3 does not produce magnetic field, and adhesive dish 10 is in separated state with driven disc 6, and driving disc 13 rotates with main shaft 1 but power can not be passed on the driven disc 6, and fan 19 is in halted state.
When water temperature rises to setting value; Coil 5 energisings, electromagnetic core 3 generation magnetic fields, magnetic force conducts through driven disc 6; Attracting adhesive dish 10 pulling spring sheets to move with driven disc 6 to driven disc 6 vertically combines; The transmission of power of main shaft 1 is to driven disc 6, and the fan 19 that drives on the driven disc 6 rotates at full speed, gets into working state.
After water temperature reduces, be lower than setting value, coil 5 outages, the magnetic field that electromagnetic core 3 produces disappears, and adhesive dish 10 is pulled under the effect of spring sheet with driven disc 6 and is separated, and the transmission of power of driving disc 13 is less than on the driven disc 6, and fan 19 is in halted state.
Electromagnetic fan clutch of the present invention can further be arranged to two speed, and is as shown in Figure 2, sets up a heat dissipation plate 9, and heat dissipation plate 9 is fixed on the driving disc 13 with its rotation.
The excircle end face of heat dissipation plate 9 is provided with second extension part 16 to driven disc 6 directions vertically; Second extension part 16 radially is positioned at the outside of driven disc first extension part 14; Hanging down in the end of second extension part 16, to be provided with 12, the second skirt sections 12, second skirt section mutually opposed with first skirt section 11, between first skirt section 11 and second skirt section 12 magnet fixed disc 7 is set; Be embedded with magnet 8 on the end face of magnet fixed disc 7; Magnet fixed disc 7 is fixed on first skirt section 11, is provided with soft iron 17 with magnet 8 relative positions on second skirt section 12, and soft iron 17 keeps certain clearance with magnet 8.
Further; One adjustment bolt 15 is set; Heat dissipation plate 9 is provided with the tapped through hole that matches with the screw rod of adjusting bolt 15, and the tapped through hole that screw rod passes heat dissipation plate 9 is against on the adhesive dish 10, and the nut 18 that matches with adjustment bolt 15 is resisted against on the exterior edge face of heat dissipation plate 9.
During work, under the low state of water temperature, coil 5 no electric circuits; Electromagnetic core 3 does not produce magnetic field, and adhesive dish 10 is in separated state with driven disc 6, and main shaft 1 drives driving disc 13 and rotates together with heat dissipation plate 9; Soft iron 17 on the heat dissipation plate 9 produces relative rotation with magnet 8, and cutting magnetic line produces foucault current, under the effect of foucault current; Produce new magnetic field again, under the effect in this new magnetic field, form between fixed magnet fixed tray 7 and the heat dissipation plate 9 and flexibly connect; Make magnet fixed disc 7 follow heat dissipation plate 13 differential low speed rotation, and then drive driven disc 6 differential low-speed runnings, drive fan 19 and slowly run.
When water temperature rises to setting value; Coil 5 energisings; Electromagnetic core 3 generation magnetic fields, magnetic force conducts through driven disc 6, attracts adhesive dish 10 pulling spring sheets to move with driven disc 6 to driven disc 6 vertically and combines; The transmission of power of main shaft 1 is to driven disc 6, and the fan 19 that drives on the driven disc 6 rotates at full speed; The driven disc 6 that flexibly connects to full-speed operation between magnet fixed disc 7 and the heat dissipation plate 9 provides additional power.
After water temperature reduces; Be lower than setting value, coil 5 outages, the magnetic field that electromagnetic core 3 produces disappears; Adhesive dish 10 is pulled under the effect of spring sheet with driven disc 6 and is separated; Main shaft 1 drives driving disc 13 and continues rotation with heat dissipation plate 9, drives driven disc 6 differential low-speed runnings through flexibly connecting between magnet fixed disc 7 and the heat dissipation plate 9, drives fan 19 and slowly runs.
When the electromagnetic core coil lost efficacy, unclamp nut 18, the screw rod of adjusting bolt 15 inwardly further is screwed into promotion adhesive dish 10 pushes against on driven disc 6, fastening nut 18 again, realize transmission of power.
Above-described embodiment describes preferred implementation of the present invention; Be not that scope of the present invention is limited; Design under the prerequisite of spirit not breaking away from the present invention; Various distortion and improvement that those of ordinary skills make technological scheme of the present invention all should fall in the definite protection domain of claims of the present invention.