CN201045382Y

CN201045382Y - Centrifugal type magnetic clutch

Info

Publication number: CN201045382Y
Application number: CNU2007200227612U
Authority: CN
Inventors: 陈伯恒
Original assignee: Individual
Current assignee: Individual
Priority date: 2007-05-31
Filing date: 2007-05-31
Publication date: 2008-04-09
Anticipated expiration: 2017-05-31

Abstract

The utility model relates to a centrifugal magnetic clutch which belongs to the clutch field and comprises an input shaft and a centrifugal axial propulsion mechanism. The utility model is characterized in that step-disc-shaped left and right thrust plates which are symmetrically distributed and can slide along the axial direction of the input shaft via sliding keys are coaxially installed on the input shaft, the centrifugal axial propulsion mechanism which leads the left and right thrust plates to move left and right respectively is compositely installed between the opposed faces of the left and right thrust plates, a plurality of magnet groups whose magnetic directions are in parallel to the axial cord of the input shaft are fixedly installed along the circumferences on the outer planes of the left and right thrust plates, and the planes are close to the outer ends of the left and right thrust plates, a step-disc-shaped connecting disc is axially installed on the left outside of the input shaft via a bearing, a step-disc-shaped output disc, the outside of which is coaxially provided with an output-end interface, is axially installed on the right outside of the input shaft via a bearing, a plurality of magnetic groups, the magnetic directions of which are in parallel to the axial cord of the input shaft and the magnet outer planes of which keep a certain axial distance from the magnet outer planes of the corresponding magnet groups, are fixedly installed along circumferences on the planes of the inner sides of the connecting disc and the output disc, wherein the planes are corresponding to the positions of the magnet groups installed on the left and the right thrust plates, and the polarities of the magnetic fields on the corresponding surfaces of two corresponding magnets are the same.

Description

Centrifugal magnetic clutch

One, technical field

The utility model is a kind of centrifugal magnetic clutch that belongs to clutch field.

Two, background technique

In mechanical field, clutch is an important mechanical part, and it mainly is to play to make mechanical system and power system combination and the effect that separates timely on request.

The kind of the clutch of conventional construction is a lot, but mainly contain several classes (referring to the common mechanical design handbook) such as jaw clutch, friction clutch, centrifugal clutch, free wheel device, magnetic clutch, safety clutch, the interelement that a common feature of these clutches is exactly a transmission of power all is to adopt contact form, except that jaw clutch, other clutch general last all be the transmission work of finishing power by friction element, so the mechanical wear problem that the existing common issue with of these clutches is exactly a friction element.Just because of the existence of these reasons, make these clutches on application area, be subjected to certain restriction.So the clutch that designs a kind of non-contact type should be more positive on effect.

Three, model utility content

The principle technological scheme of the centrifugal magnetic clutch that the purpose of this utility model is the employing permanent magnet that proposes a kind of non-contact type is relatively wider, relatively simple for structure as the Applicable scope of the primary element of transferring power, large-sized power machinery also is suitable for.

The utility model is achieved in that to have input shaft 1 and centrifugal axial advance mechanism in the mechanism, it is characterized in that: coaxial Tong Guo the feather key 4 that symmetrical distribution is housed is along input shaft 1 discoidal left push-plate 10 of ladder and right push-plate 12 in axial sliding on input shaft 1, between the opposing side of left push-plate 10 and right push-plate 12, compound a centrifugal axial advance mechanism that can make the two do side-to-side movement respectively along input shaft 1 is housed, on the close plane of outer end of the left push-plate 10 and right push-plate 12 outsides, the group of magnets of a plurality of magnetic directions and input shaft 1 parallel axes fixedly is housed respectively along circumference, left-external side at input shaft 1, by the bearing 2 coaxial ladder disc tie-plates 5 that are equipped with, the right outside at input shaft 1, by bearing 2 coaxial its coaxial ladder disc output discs 13 that are shaped on the output terminal interface in outside that are equipped with, inboard on tie-plate 5 and output disc 13 is respectively with being contained in group of magnets on left push-plate 10 and the right push-plate 12 on the plane of corresponding position, keep the identical group of magnets of magnetic field polarity at certain axial distance and corresponding surface places two corresponding magnet along corresponding respectively magnet outerplanar that a plurality of magnetic directions and input shaft 1 parallel axes fixedly be housed of circumference and magnet outerplanar in the corresponding group of magnets, connect coil 5 and the outer end of output disc 13 inboards be set with two end faces and coil 5 and the ring joint sleeve 9 that is fixedly connected of the outer end of output disc 13 inboards with connecing respectively.

Can on the shaft part of the input shaft 1 in two outsides that left push-plate 10 and right push-plate 12 are housed, be set with a ring stop collar 3 with given width.

Being confined to centrifugal 11 sectional shape on sense of rotation doing radial motion and can making trapezoidal or spherical in the centrifugal axial advance mechanism, and centrifugal 11 both sides pressure surface be fabricated directly on the corresponding surface of left push-plate 10 and right push-plate 12, at this moment, two pressure surfaces should be made by the outer end to center portion recessed plane or arc surface in the plane of push-plate 10 and right push-plate 12 left respectively progressively, and, centrifugal 11 protruding part of along the circumferential direction moving of restriction should be left in the both sides of recessed surface.

Magnet 7 in the group of magnets is permanent magnet, its shape can be made into ladder cylindrical or truncated cone shape or ladder rectangle or trapezoidal, magnet 7 can be contained in a cavity shape corresponding with the profile of magnet 7 and be fixed in the magnet overcoat 8 on the working position by screw or rivet, also can be in magnet overcoat 8 inner chambers pack into the magnet cushion block 6 of a cylindrical or ring of the place, the inner of magnet 7.

During concrete work, for example when centrifugal magnetic clutch is used for heavy mechanical equipment, the input end of centrifugal magnetic clutch can be connected with motor, its output terminal is connected with machinery, so, when motor just starts, because rotating speed is lower in the regular hour, so at this moment the centrifugal force that produces under the effect that mechanism rotates of moving centrifugal 11 in the mechanism is less relatively, therefore be not enough to play and drive the purpose that left push-plate 10 and right push-plate 12 move to the working position together, at this moment, since the magnet 7 in the group of magnets on left push-plate 10 and the right push-plate 12 respectively with tie-plate 5 and output disc 13 on group of magnets in magnet 7 corresponding end faces between distance relative far away, so at this moment machinery is to be in a static relatively state, and motor really can progressively start under near the state of zero load, when the rotating speed of motor acquires a certain degree, left side push-

plate

10 and 12 beginnings of right push-plate are vertically to two lateral movements, because between the corresponding magnet 7 is that homopolarity is relative, so under action of centrifugal force, when the group of magnets of correspondence mutually near constantly, the two must produce an effect of repelling mutually, owing at this moment be in group of magnets on left push-plate 10 and the right push-plate 12 around rotational, so, under the constraint conditio of mutual alignment, at this moment the group of magnets that is on tie-plate 5 and the output disc 13 also can begin the trend that thereupon rotates, and begin machinery is produced an Operating torque that progressively strengthens, therefore, the inertial mass that this Operating torque of progressively strengthening begins to overcome the associated components of machinery own makes equipment finish the work of starting stably, when electrical motors arrives the nominal operation rotating speed, left side push-plate 10 and right push-plate 12 have arrived the normal operation position by stop collar 3 restrictions under action of centrifugal force, machinery has also just entered normal working state.When machinery runs into the unexpected increase of load or catching phenomenon in the course of the work; because the Maximum Torque that mechanism can transmit determines according to designing requirement; so under the overload situation; centrifugal magnetic clutch will produce skidding, so just effectively protected the safety of motor and equipment.Facts have proved, because the magnet 7 in the mechanism in the group of magnets of correspondence is that homopolarity is relative, so even the overload phenomenon takes place for a long time, mechanism can not produce superheating phenomenon yet, therefore, centrifugal magnetic clutch is the soft start work that can well finish usually said heavy mechanical equipment.

Because the utility model Applicable scope is wider relatively, and it is relatively simple for structure, manufacture cost is relatively low, and the flexibility of design is more intense, for example: all can effectively play energy-conservation effect when the utility model is used for the soft start work of heavy mechanical equipment and automobile clutch, so, can produce positive effect after estimating to implement.

Four, description of drawings

The utility model has 3 accompanying drawings, and Fig. 1 is the basic principle schematic of centrifugal magnetic clutch, and Fig. 2 is the A-A sectional view of Fig. 1, and Fig. 3 is the B-B sectional view of Fig. 1.Among each figure: 1, input shaft, 2, bearing, 3, stop collar, 4, feather key, 5, tie-plate, 6, the magnet cushion block, 7, magnet, 8, the magnet overcoat, 9, joint sleeve, 10, left push-plate, 11, centrifugal, 12, right push-plate, 13, output disc.

Five, embodiment

Below, in conjunction with Figure of description the technological scheme that the utility model proposes is further described:

Can see in the accompanying drawings, have input shaft 1 and centrifugal centrifugal axial advance mechanism in the mechanism, it is characterized in that: coaxial Tong Guo the feather key 4 that symmetrical distribution is housed is along input shaft 1 discoidal left push-plate 10 of ladder and right push-plate 12 in axial sliding on input shaft 1, between the opposing side of left push-plate 10 and right push-plate 12, compound a centrifugal axial advance mechanism that can make the two do side-to-side movement respectively along input shaft 1 is housed, on the close plane of outer end of the left push-plate 10 and right push-plate 12 outsides, the group of magnets of a plurality of magnetic directions and input shaft 1 parallel axes fixedly is housed respectively along circumference, left-external side at input shaft 1, by the bearing 2 coaxial ladder disc tie-plates 5 that are equipped with, the right outside at input shaft 1, by bearing 2 coaxial its coaxial ladder disc output discs 13 that are shaped on the output terminal interface in outside that are equipped with, inboard on tie-plate 5 and output disc 13 is respectively with being contained in group of magnets on left push-plate 10 and the right push-plate 12 on the plane of corresponding position, keep the identical group of magnets of magnetic field polarity at certain axial distance and corresponding surface places two corresponding magnet along corresponding respectively magnet outerplanar that a plurality of magnetic directions and input shaft 1 parallel axes fixedly be housed of circumference and magnet outerplanar in the corresponding group of magnets, be set with two end faces in the outer end of tie-plate 5 and output disc 13 inboards and coil 5 and the ring joint sleeve 9 that is fixedly connected of the outer end of output disc 13 inboards with connecing respectively.As can be seen, this mechanism can fixedly mount a plurality of group of magnets at outer end, two the disk upper edges circumference of the effect lower edge input shaft 1 axial side-to-side movement of centrifugal centrifugal axial advance mechanism, a plurality of group of magnets also have been installed being connected on tie-plate 5 on the shaft part of 1 liang of the input shaft outside and the corresponding position on the output disc 13 correspondence by coaxial bearing again, the active force that mechanism is connected relies on centrifugal force to provide, in fact, because centrifugal centrifugal axial advance mechanism is a traditional mechanical mechanism, in mechanical field, obtained using widely, so can adopt a variety of structural type during specific design, its final purpose be so long as can reach and make left push-plate 10 and right push-plate 12 have enough thrust and to arrive normal working position just passable, so can select for use flexibly during specific design.

Can on the shaft part of the input shaft 1 in two outsides that left push-plate 10 and right push-plate 12 are housed, be set with a ring stop collar 3 with given width.The main purpose that adopts this structure is the axial maximum functional position of left push-plate 10 of restriction and right push-plate 12, otherwise, in case the loading condition of machinery changes, be installed in left push-plate 10 and right push-plate 12 group of magnets and just may produce collision with the group of magnets that is installed on tie-plate 5 and the output disc 13, or causing centrifugal deviate from, this obviously is unallowed.

Being confined to centrifugal 11 sectional shape on sense of rotation doing radial motion and can making trapezoidal or spherical in the centrifugal axial advance mechanism, and centrifugal 11 both sides pressure surface be fabricated directly on the corresponding surface of left push-plate 10 and right push-plate 12, at this moment, two pressure surfaces should be made by the outer end to center portion recessed plane or arc surface in the plane of push-plate 10 and right push-plate 12 left respectively progressively, and, centrifugal 11 protruding part of along the circumferential direction moving of restriction should be left in the both sides of recessed surface.In fact, structure cuts both ways in two, and the former is because friction area is relatively large, so may produce more relatively frictional heat under the condition of frequent starting, the latter can overcome this problem preferably, but the speed of its wearing and tearing wants fast relatively under powerful condition.In a word, not necessarily will adopt this structure in two fully, during specific design, can select for use flexibly with reference to traditional structure.

Magnet 7 in the group of magnets is permanent magnet, its shape can be made into ladder cylindrical or truncated cone shape or ladder rectangle or trapezoidal, magnet 7 can be contained in a cavity shape corresponding with the profile of magnet 7 and be fixed in the magnet overcoat 8 on the working position by screw or rivet, also can be in magnet overcoat 8 inner chambers pack into the magnet cushion block 6 of a cylindrical or ring of the place, the inner of magnet 7.Generally speaking, magnet adopts the ndfeb magnet of operating temperature about 180 degree Celsius just passable, can adopt scythe and cobalt kind magnet in case of necessity, but its cost is higher relatively.Under the possible condition, the material of magnet overcoat 8 and left push-plate 10 and right push-plate 12 and tie-plate 5 and output disc 13 can be selected Austenitic Stainless Steel for use.

Claims

1. centrifugal magnetic clutch, have input shaft (1) and centrifugal axial advance mechanism, it is characterized in that: go up coaxial Tong Guo the feather key (4) that symmetrical distribution is housed along input shaft (1) discoidal left push-plate of ladder (10) and right push-plate (12) in axial sliding at input shaft (1), between the opposing side of left push-plate (10) and right push-plate (12), compound a centrifugal axial advance mechanism that can make the two do side-to-side movement respectively along input shaft (1) is housed, on the close plane of outer end of the left push-plate (10) and right push-plate (12) outside, the group of magnets of a plurality of magnetic directions and input shaft (1) parallel axes fixedly is housed respectively along circumference, left-external side in input shaft (1), by the coaxial ladder disc tie-plate (5) that is equipped with of bearing (2), the right outside at input shaft (1), by coaxial its coaxial ladder disc output disc (13) that is shaped on the output terminal interface in outside that is equipped with of bearing (2), inboard on tie-plate (5) and output disc (13) is respectively with being contained in group of magnets on left push-plate (10) and the right push-plate (12) on the plane of corresponding position, keep the identical group of magnets of magnetic field polarity at certain axial distance and corresponding surface places two corresponding magnet along corresponding respectively magnet outerplanar that a plurality of magnetic directions and input shaft (1) parallel axes fixedly be housed of circumference and magnet outerplanar in the corresponding group of magnets, be set with the ring joint sleeve (9) that two end faces are fixedly connected with the outer end that connects dish (5) and output disc (13) inboard respectively in the outer end that connects dish (5) and output disc (13) inboard.

2. centrifugal magnetic clutch according to claim 1 is characterized in that: can be set with a ring stop collar (3) with given width on the shaft part of the input shaft (1) in two outsides that left push-plate (10) and right push-plate (12) are housed.

3. centrifugal magnetic clutch according to claim 1, it is characterized in that: being confined to centrifugal (11) sectional shape on sense of rotation doing radial motion and can making trapezoidal or spherical in the centrifugal axial advance mechanism, and centrifugal (11) both sides pressure surface be fabricated directly on the corresponding surface of left push-plate (10) and right push-plate (12), at this moment, two pressure surfaces should be made by the outer end to center portion recessed plane or arc surface in the plane of push-plate (10) and right push-plate (12) left respectively progressively, and, centrifugal protruding part that along the circumferential direction move (11) of restriction should be left in the both sides of recessed surface.

4. centrifugal magnetic clutch according to claim 1, it is characterized in that: the magnet in the group of magnets (7) is permanent magnet, its shape can be made into ladder cylindrical or truncated cone shape or ladder rectangle or trapezoidal, magnet (7) can be contained in a cavity shape corresponding with the profile of magnet (7) and be fixed in the magnet overcoat (8) on the working position by screw or rivet, also can be in magnet overcoat (8) inner chamber pack into the magnet cushion block (6) of a cylindrical or ring of the place, the inner of magnet (7).