CN2093922U - Magnetic clutch - Google Patents

Abstract

The utility model relates to a magnetic clutch, comprising a drive shaft, a driven shaft, a hydraulic oscillating motor, magnetic sheets, a casing, etc. The drive and the driven shafts have the same one shaft center, the magnetic pieces are respectively arranged on the drive and the driven shafts, a controlling magnetic sheet can be pendulated round the shaft center. The drive and the driven shaft magnetic sheets are inserted and arranged alternately, and the arranged center of the magnetic sheets is taken as a symmetric shaft. The hydraulic oscillating motor takes the controlling magnetic sheet as a pendulating shaft, a cylinder body is arranged on the inner circumferential wall of the driven shaft, and a flow guide ring which is arranged on the housing is matched with the pulley of the driven shaft.

Description

Magnetic clutch

The utility model relates to the engaging and disengaging gear of master and slave moving part in the mechanical transmission, belongs to field of mechanical technique.

Clutch at present commonly used has jaw clutch, engagement sleeve, friction clutch, centrifugal clutch, surmount device closes device, magnetic clutch etc.Jaw clutch and engagement sleeve by the engagement tooth, the flank of tooth come transmitting torque, shortcoming be in conjunction with the time impulsion is arranged, need under the very low situation of relative velocity, carry out.Friction clutch is the frictional force transmitting torque by surface of contact; combination can be in operation; the safety protection effect of can having skidded during overload; but need bigger axial combination force; and to often adjust the gap of rubbing surface, and with compensate for wear, rubbing surface slide relative loss power; under the frequent situation of working, heating problem is difficult to solve.Free wheel device, transmitting torque is less.Magnetic clutch, the disengagement time is longer, needs DC power-supply system.

The purpose of this utility model provides a kind of nothing and impacts, generates heat, weares and teares the magnetic clutch that transmitting torque is bigger.

The purpose of this utility model is achieved in that as Fig. 1, magnetic clutch is provided with driving shaft 2, driven shaft 10, hydraulic pressure rotary actuator 6, shell 11 and magnetic sheet etc., driving shaft is concentric with driven shaft, be respectively equipped with on it and (comprise two) more than two and have many magnetic sheets (be called for short N to) magnetic pole, the mutual difference of the magnetic sheet that driving shaft and moving axis are established is one, the magnetic sheet that diaxon is established adds up to odd number, being provided with in the magnetic sheet can be around the control magnetic sheet of axis swing, and control magnetic sheet number is that the magnetic sheet sum subtracts one divided by four.Establish magnetic sheet 4,8 on the driving shaft 2, claim the driving shaft magnetic sheet, the magnetic sheet 3,5,9 from driving shaft 10 is established claims the driven shaft magnetic sheet.The driving shaft magnetic sheet is alternate with the driven shaft magnetic sheet to be interted, and axially-aligned is a symmetry axis with magnetic sheet arrangement center.Hydraulic pressure rotary actuator 6 is a balance staff with the control magnetic sheet, is made of cylinder body and guide ring etc., and cylinder body is located on driven shaft 10 circumferential inner walls, and guide ring is located on the shell 11 and slides with driven shaft.

Has conservative energy according to magnetic field, attraction force that has between magnetic pole or repulsive force need not can directly produce the principle of active force by any instrumentality by the material of all non-superconducting states, make driving part drive the driven member running, its carry-over moment Basic calculation method is known from theoretical mechanics: one tie up to the power of a certain direction or moment equal this direction can degree of passing, can be expressed as:

Tk＝ (αW)/(αθi)

T _Always---mechanism transmits resultant couple.

Tk---transfer function is in the moment of θ direction between magnetic sheet.

K---the magnetic sheet sum subtracts one.

The energy of W---system.

θ---i direction angle of rotation.

The magnet active force formula that forms between driving part and driven member is:

K＝ (μO)/(4π) × (Qm ₁×Qm ₂)/(R ²)

_Always---active force summation between each magnetic sheet of mechanism.

K---active force between magnetic sheet.

K---the magnetic sheet sum subtracts one.

R---pole pitch between two magnetic sheets.(each magnetic pole distance of the utility model magnetic clutch is from equating.）

μ 0---absolute permeability of vacuum.

Qm ₁.Qm ₂---pole strength (pole strength of each magnetic pole of the present utility model equates)

Qm ₁.Qm ₂Just be, driving shaft is extremely relative with N with N on the driven shaft magnetic sheet, and S is extremely relative with S, is repulsive force, is negative value.

As Qm ₁, Qm ₂Be one positive one negative, just N is extremely relative with S, is attraction force, on the occasion of.From Coulomb's law as can be known, repulsive force numerically equates with attraction force.

As Fig. 1,2,6, gear pump 15 is oil pumping from fuel tank 17 under the driving force of motor 16, adjust to authorized pressure through relief valve 13, in pressure gauge 14, show and be stabilized under the situation of this pressure, solenoid directional control valve 12 can change pressure oil and oil return direction, the swaying direction of control rotary actuator 6 and control magnetic sheet.

When oily flow path direction as shown in Figure 1 the time, oil stream enters oil cylinder by guide ring through three oilholes among Fig. 6, and balance staff is promptly controlled magnetic sheet rotation π/n radian under the effect of pressure oil, and oil return is flowed out through guide ring from other three oilholes. Magnetic sheet 3 and 4,4 and 5,5 and 8,8 and 9 is all as Fig. 5, and N is extremely relative with S, is attraction force, be on the occasion of, the magnetic sheet sum is 5, so its active force of k=5-1=4

, driving shaft magnetic sheet and driven shaft magnetic sheet are in the attraction bonding state, and driving shaft drives driven shaft running work.

Change oily flow path direction by solenoid directional control valve 12, as Fig. 3, Fig. 7, former filler opening is changed into oil outlet, and oil outlet changes over filler opening, and oily stream passes through guide ring among Fig. 7, enter oil cylinder through three oilholes, balance staff is promptly controlled magnetic sheet to opposite spin π/n radian under pressure, and oil return is flowed out through guide ring from other three oilholes, magnetic sheet 3 and 4,8 and 9, as shown in Figure 5, N is extremely relative with S, is attraction force, on the occasion of

, magnetic sheet 4 and 5,5 and 8 as shown in Figure 4, N is extremely relative with N, S is extremely relative with S, is repulsive force, negative value,

, then total force is

So driving shaft magnetic sheet and driven shaft magnetic sheet force balance each other, driving shaft and driven shaft are in clutch state, and driving shaft can not drive driven shaft running work.

The utility model novel structure, compact and reasonable, manufacturing process is simple, uses easy to operately, do not have to impact, vibration, phenomenons such as noise, heating, wearing and tearing, high working efficiency, long service life can be widely used in mechanical transmission fields.

Accompanying drawing 1,3 is the utility model magnetic clutch structural representation, 1 non-magnet material protective coating among the figure, 2 driving shafts, 3,5,9 driven shaft magnetic sheets, 6 hydraulic pressure rotary actuators, 7 guide rings, 4,8 driving shaft magnetic sheets, 10 driven shafts, 11 shells.

Accompanying drawing 2 is the Hydraulic Servo Control schematic diagram of the utility model magnetic clutch, 6 hydraulic pressure rotary actuators among the figure, 12 solenoid directional control valves, 13 relief valves, 14 pressure gauges, 15 gear pumps, 16 motors, 17 fuel tanks.

Accompanying drawing 4,5 is a magnetic sheet structural representation of the present utility model.

Accompanying drawing 6,7 is the structural representation of control magnetic sheet of the present utility model and hydraulic pressure rotary actuator, 5 control magnetic sheets among the figure, 7 guide rings, 18 cylinder bodies.

Narrate case study on implementation of the present utility model with reference to the accompanying drawings.

Driving shaft 2 is concentric with driven shaft 10, in shell 11, one end of driving shaft 2 is located in the end of driven shaft, main, be provided with bearing location transition between the driven shaft, being provided with the bearing supporting between shell 11 and driving shaft and the driven shaft is connected, establish magnetic sheet 4 on the outer circle wall of driving shaft 2,8, establish magnetic sheet 3 on driven shaft 10 inner peripheral walls, 5,9, the driving shaft magnetic sheet is alternate with the driven shaft magnetic sheet to be interted, axially-aligned is provided with the distance of necessarily having living space between magnetic sheet and the magnetic sheet, be symmetry axis with magnetic sheet arrangement center, driven shaft magnetic sheet 5 also is the balance staff of hydraulic pressure rotary actuator for the control magnetic sheet.The oil cylinder of hydraulic pressure rotary actuator is located on the driven shaft inner peripheral wall, and guide ring 7 is fixed on the shell 11, and different stream ring and driven shaft are slidingly matched.Establish three pairs of magnetic poles on the every magnetic sheet, pole material adopts Rare-Earth Cobalt or other ferromagnetic material, and magnetic pole is provided with non-magnet material protective layer 1, and hydraulic pressure rotary actuator 6 is connected with solenoid directional control valve in the hydraulic system.

Claims (2)

1, a kind of magnetic clutch, it is characterized in that being provided with in the clutch driving shaft, driven shaft, hydraulic pressure rotary actuator, magnetic sheet and shell, driving shaft is concentric with driven shaft, magnetic sheet is located at respectively on the master and slave moving axis, being provided with in the magnetic sheet can be around the control magnetic sheet of axis swing, the alternate interspersed arrangement of driving shaft magnetic sheet with the driven shaft magnetic sheet, with magnetic sheet arrangement center is symmetry axis, the hydraulic pressure rotary actuator is a balance staff with the control magnetic sheet, cylinder body is located on the driven shaft inner peripheral wall, and guide ring is located on the shell, and guide ring and driven shaft are slidingly matched.

2, clutch according to claim 1 is characterized in that the odd number that adds up to of said magnetic sheet, and the mutual difference of driving shaft magnetic sheet and driven shaft magnetic sheet is one, and every magnetic sheet is provided with many to magnetic pole.

Images