CN1162078A

CN1162078A - Normally-closed brake

Info

Publication number: CN1162078A
Application number: CN 95106603
Authority: CN
Inventors: 谢兴云
Original assignee: Individual
Current assignee: Individual
Priority date: 1995-06-28
Filing date: 1995-06-28
Publication date: 1997-10-15
Anticipated expiration: 2015-06-28
Also published as: MX9700115A; CN1067467C

Abstract

The normally-closed brake includes driving part, driven part, connecting mechanism capable of making driving part drive driven part move along first direction, fixing seat with friction surface and brake part connected on the dirven part. Said ocnnecting mechanism includes an acting block and a driving block. Both can produce relative movement when the dirving part gets driving force or loses one, and make driving block displace relatively to driven part in second direction to brake driven part or relieve brake. Besides, it also includes a delimiter mechanism for limiting the relative movement distance of the acting block and driving block and making them be in common moving state after the brake or relief is completed.

Description

Normally engaged brake

The present invention relates to a kind of normally closed braking device of mechanical type that is used for the braking motion object.Here so-called Normally closed type braking device is meant, when driving link and driven member remained static, this braking device was in braking state all the time.

No matter existing break is mechanical power type or electromagnetic type, or the electromagnetic hydraulic pressure formula, all needs structure power source apparatus complicated, that consume the suitable energy.As existing normally closed brake, the power source apparatus that it need add provides external force to remove the Normally closed type braking.Be example with electromagnetic brake formula break in addition, normally off comes object is braked as braking force with spring force, when this object need move or rotate, then needs to overcome spring force with the generation electromagnetic force and remove normally closed braking state to the electromagnet energising.

It is 87102097 that the Chinese invention patent communique disclosed application number on April 26th, 1989, is entitled as " braking device that is converted to braking force with inertial force ".This braking device is made of additional force source apparatus, follower, arrestment mechanism and boosting mechanism, and the main braking external force when realizing braking is to convert by being braked the inertial force that object had when the motion.This device has that period of braking is short, and alleviation speed is fast, the characteristics of reliable operation, but the proper motion state still needs the additional force source apparatus that brake operation force is provided, and during the work of additional force source apparatus, still need to consume certain energy.

In view of this, the present invention further develops with significant improvement the prior art that comprises above-mentioned patent to propose a kind of compact structure, does not need extra power source can realize braking or the device of brake off when normal operating condition or state of rest.

A further object of the present invention is, propose a kind of utilize between driving link and the driven member in the beginning transmission and stop transmission and begin after a period of time in the relative movement that occurs realize braking or alleviating the device of braking.

Further purpose of the present invention is, proposes the device that a kind of concavo-convex fitting surface that utilizes the bindiny mechanism between driving link and the driven member realizes braking or alleviating braking.

The present invention proposes a kind of like this normally engaged brake, include driving link, driven member, can make driving link drive driven member along bindiny mechanism that first direction moves, have the fixed base of rubbing surface, thereby and be connected and can fit with the rubbing surface on the fixed base on the driven member or throw off and realize the braking that driven member is moved along first direction or the brake component of alleviation; Point of the present invention is,

Described bindiny mechanism is arranged between described driving link and the driven member, and comprise that one can be carried out the effect piece of first direction motion and one jointly with driving link and can carry out the first direction motion jointly with driven member and can produce the driving block of second direction relative displacement with respect to this driven member again;

But described effect piece and driving block have the cooperating structure of relative movement, when driving link obtains active force or loses active force, they can produce this relative movement, make driving block on second direction, produce displacement, thereby realize the alleviation of driven member braking or realize braking driven member with respect to driven member;

Described bindiny mechanism comprises that also limits a mechanism, is used for the relative movement distance of qualification effect piece and driving block, and makes them be in common motion state after braking or alleviation are finished.

And in described break, the motion of described first direction can be and rotatablely moves.

And in described break, described qualification mechanism can comprise the spring of driving block being pressed to the effect piece, after relative movement, produces the enough power that can carry out associated movement with guarantee effect piece and driving block each other.

And in described break, described qualification mechanism also can comprise: connect a dish on the described driving link, be provided with a plurality of bearing pins outside the center of this dish; Also comprise a dish on the described driven member,, on the dish of this driven member, be provided with a plurality of slotted holes along the circular arc direction corresponding to the position of described bearing pin, described bearing pin can be in this slotted hole relative movement and against a certain end of this slotted hole.

And in described break, described driving link and driven member can be upper and lower settings, and described qualification mechanism is included in a dish that connects on the described driving link, is provided with a plurality of bearing pins outside the center of this dish; Also be included in a dish on the described driven member, be provided with a plurality of slotted holes along the circular arc direction corresponding to the position of described bearing pin on the dish of this driven member, described bearing pin can move in slotted hole and a certain end of final and this slotted hole leans.

And in described break, the cooperating structure that produces relative movement between the acting surface of described effect piece and driving block is the cam cooperating structure, and any one side in the acting surface of the acting surface of described effect piece and driving block is a camming surface.After relatively rotating between them, the displacement along second direction that can make described driving block produce described relatively effect piece, thus realize braking or make release of brake.

And in described break, the acting surface of described effect piece and described driving block can be camming surface.

And in described break, the displacement of the second direction that described driving block is done can that is to say to have in this break along the driving block of the axial direction generation second direction displacement of rotation driven member for the axial direction along the rotation driven member.

And in described break, the displacement of the second direction that described driving block is done can that is to say to have in this break along the driving block of the radial direction generation second direction displacement of rotation driven member for the radial direction along the rotation driven member.

And, in described break, the dish of described brake component and described driven member can be structure as a whole, and the integrative-structure of described brake component and dish comprises a disk body and a core body with ring gear, between described disk body and the described core body, the feather key that can establish compensation mechanism and disk body and core body are moved along first direction jointly, described compensation mechanism comprises the groove that is arranged in core edge part, be positioned at this groove has tooth piece tooth and that can cooperate with described disk body, and the spring between the bottom of described tooth piece and described groove.

And, in described break, all can have concavo-convex acting surface on two end faces of the edge rotation driven member axis of described effect piece, and utilize described two end faces to cooperate with two driving blocks simultaneously simultaneously; That is to say that having in this break along two end faces of rotation driven member axial direction is the effect piece of the cooperating structure that cooperates with two driving blocks respectively.

And in described break, the rubbing surface on the described fixed base can be the conical surface, plane or cylinder, and the braking surface on the described brake component also is the conical surface, plane or cylinder.

And in described break, the motion of described first direction also can be straight line motion; And in described break, the displacement of the second direction that described driving block is done can be the Vertical direction of driven member that moves along a straight line; That is to say that the Vertical direction that has the driven member that moves along a straight line in this break produces the driving block of second direction displacement.

Above conception plans of the present invention and other purpose and advantage will be by becoming more clear below in conjunction with accompanying drawing to embodiment's explanation.

Fig. 1 is the sectional view along the 1st embodiment of the present invention of the A-A line among Fig. 2, shows the structure of sliding pin, sliding eye and connecting rod:

Fig. 2 is the sectional view along the B-B line among Fig. 1;

Fig. 3 is the axial view of power switching mechanism:

Fig. 4 is the sectional view along the G-G line among Fig. 3;

Fig. 5 is the unfolded drawing of the concavo-convex fitting surface of effect piece and driving block:

Fig. 6 is the sectional view along the 2nd embodiment of the present invention of the C-C line among Fig. 7;

Fig. 7 is the sectional view along the D-D line among Fig. 6;

Fig. 8 is the compensation mechanism sectional view along the E-E line among Fig. 6;

Fig. 9 is the compensation mechanism sectional view along F-F line among Fig. 6;

Figure 10 is the 3rd embodiment's of the present invention axial sectional view;

Figure 11 is applied to the plan view of speed reducer for the present invention;

Figure 12 is the sectional view along the M-M line among Figure 11;

Figure 13 is the sectional view along the N-N line among Figure 11;

Figure 14 is the 5th embodiment's of the present invention axial sectional view;

Figure 15 is the 6th embodiment's of the present invention axial sectional view;

Figure 16 is the 7th embodiment's of the present invention sectional view;

Figure 17 is the sectional view along the K-K line among Figure 16;

Figure 18 is the sectional view along the 6H-H line among Figure 16;

Figure 19 is the 8th embodiment of the present invention.

Fig. 1 to Fig. 5 shows the 1st embodiment of the present invention.

Normally engaged brake according to the embodiment of the invention 1 includes fixed base 1, brake component 2, brake spring 3, power switching mechanism 4, driven member 9, driving link 11, and its structure and interconnected relationship are as follows:

Fixed base 1 is provided with brake slipper 6 (the two is one), and the brake area 8 of brake component 2 can be the plane or the conical surface, thereby brakes with rubbing surface clutch realization braking or alleviation on the brake slipper 6.Figure 2 shows that the state of the rubbing surface close contact of brake component rubbing surface and brake slipper 6, promptly be in braking state.

Have sliding eye 7 and the axle sleeve 10 that is used to be connected passive driven member 9 along the circular arc direction on the brake component 2, this sliding eye 7 has certain length along the circular arc direction.Because brake component 2 is integral with axle sleeve 10, so when brake component 2 is in braking state with brake slipper 6 close contact, be to realize the braking of passive driven member 9, and by the cooperating of axle sleeve 10 and driven member 9, brake component 2 driven member 9 relatively slide along axial direction with axle sleeve 10.

Connecting rod 12 1 ends are contained on the brake component 2, and spring 3 is contained in this end of connecting rod, and its spring force acts on the brake component 2.When this break was in braking state, brake component 2 is close contact brake slipper 6 owing to the effect of spring 3.(effect of brake slipper 16 and spring 20 is seen below and is stated among Fig. 1).

Power switching mechanism 4 constitutes (seeing Fig. 3 to Fig. 5) by the effect piece 13 that is connected with driving link 11 and the driving block 14 of fixedlying connected with brake component 2.Effect piece 13 is the surface of contact 15 (being equivalent to also have camming surface on the driven member in the cam mechanism) that convex-concave matches with driving the surface of contact of advising piece 14.When driving link obtains 13 rotations of active force induced effect piece, the convex surface section of convex surface section on it on driving block 14 moves and driving block 14 produced thrust, make driving block 14 move (shown in arrow among Fig. 5) vertically, thereby driving brake component 2 overcomes the active force of spring 3 to be moved outward, makes the brake area on the brake component 2 leave brake slipper 6 and the brake off state.

Sliding eye 7, one ends that sliding pin 5 is positioned at brake component 2 are connected with driving link 11, and the other end cooperates (see figure 1) with effect piece 13 in the power switching mechanism 4.Sliding pin 5 can relatively move in sliding eye 7.The displacement induced effect piece 13 that utilizes sliding pin 5 to produce in sliding eye 7 rotates, and can drive brake component 2 by driving block 14 and move.

The present invention removes normally closed braking state, makes the process of passive driven member 9 proper motions is such: when driving link 11 by such as active members such as motor startings entry into service the time, driving link 11 obtains active force to begin rotation thereupon and drives sliding pin 5 to produce displacement in sliding eye 7, the sliding pin 5 the other ends then effect piece in the drive switching mechanism 13 rotate, effect piece 13 promptly produces thrust to driving block 14, utilize driving block 14 to make outer the moving of brake component 2 and brake off progressively, when braking state when still remove fully at the end, passive driven member 9 still remains static.When sliding pin 5 was moved to an end of sliding eye 7, braking state was removed fully.At this moment, 5 of sliding pins drive brake component 2 as the moment of torsion passing shaft and rotate, and are connected the i.e. proper motion thereupon of passive driven member 9 in the brake component axle sleeve 10.Specifically, utilize driving link 11 at first to rotate and the 9 static time differences of temporary place of driven member, by the displacement of sliding pin 5 in sliding eye 7, induced effect piece 13 rotates, and driving block 14 is driven outside the brake components 2 move and the brake off state.After braking state is removed fully, when passive driven member runs well, effect piece 13 in the power switching mechanism is owing to the effect of sliding pin 5 is rotated, and because the position-limiting action of sliding eye 7, convex surface section on the guarantee effect piece 13 contacts with convex surface section on the driving block 14 reliably, makes braking keep the state that is disengaged.

The process of recovering normally closed braking state is, when needs are braked, cut off the power supply of active member (as motor), driving link 11 is owing to lose active force because of the reaction torque reduction of speed when moving, rightabout displacement when sliding pin 5 promptly produces with starting in sliding eye 7, thereby the 13 corresponding counter-rotatings of induced effect piece make the convex surface section on the effect piece 13 move towards the concave surface section on the driving block 14, eliminate with respect to the thrust of driving block 14 until effect piece 13.Because brake spring 3 acts on brake component 2, so brake component 2 is because the pressure contact brake slipper 6 of spring 3, produce surface friction drag and make brake component 2 stop motions, the passive driven member 9 that is connected in brake component 2 and the axle sleeve 10 is braked thereupon, promptly realizes braking state.

It is to be noted, only related to the situation that an axial sides of effect piece 13 cooperates with the cam action face of driving block 14 as acting surface in the foregoing description, but be actually effect piece 13 and two

driving blocks

14 and 18 structures that cooperate (see and act on the following part of piece 13 among Fig. 5) shown in Fig. 1 to Fig. 5, not only have brake component 2 in this structure, also have another brake component 16.In fact in the present embodiment brake component 16 can be set, can know from top description, the effect of next brake component 2 of ordinary circumstance is just enough, can change a simple plate on the position of brake component 16 into, and the other end of connecting rod 12 can be connected on this plate.Below the 2nd embodiment of the present invention will the structure that have brake component 16 be described in detail.(represented another driving block 18 and surface of contact 19 and brake spring 20 among Fig. 4, seen below and state)

It is pointed out that also in fact the driven member of present embodiment and the mutual connection relationship of driving link are equivalent to an elastic coupling flexible coupling.

Fig. 6 to Fig. 9 illustrates the 2nd embodiment of the present invention, and wherein same with the above-mentioned embodiment or similar parts mark with identical label.

At the opposite side setting and the brake component 2 corresponding brake components 16 of brake slipper 6, the brake area of brake component 16 is corresponding to the another side rubbing surface clutch of brake slipper 6.The other end setting and the driving block 14 corresponding driving blocks 18 (referring to Fig. 4, Fig. 5) of effect piece 13, protruding, the recessed surface of contact 19 and surface of contact 15 symmetries of effect piece 13 and driving block 18.Be provided with the feather key 17 that can make these two motions simultaneously and stop simultaneously between the axle sleeve of the axle sleeve of brake component 16 and brake component 2, and this two brake component can move axially relatively along feather key 17.The two end part of connecting rod 12 are connected respectively on brake component 2 and the brake component 16, and spring 3 is equipped with in the end that is connected the connecting rod 12 on the brake component 2, and the elastic force of this spring acts on brake component 2.The spring 20 (referring to Fig. 2) symmetrical with spring 3 can be equipped with in the other end of connecting rod 12, and the spring force of this spring acts on the brake component 16.In addition, the other end of connecting rod 12 also can be fixed on the brake component 16, and spring 3 acts on (see figure 7) on the brake component 16 by connecting rod 12.The brake area of brake component 2 and brake component 16 is provided with friction plate, stressed even for making, sliding pin 5 and sliding eye correspondingly 7 are provided with two at least, and distribute symmetrically and evenly, sliding eye 7 on the present embodiment brake component 2 is 6 (see figure 6)s, and corresponding sliding pin 5 is 6, and is stressed even for making, the connecting rod 12 that is used to connect brake component is established two at least, and is to be provided with symmetrically and evenly; The brake spring 3 of present embodiment is two, and brake spring 20 can be two, also can not establish.

The working procedure of second embodiment of the invention brake off state is, effect piece 13 rotates with the rotation of sliding pin 5 when driving link obtains the active force starting, driving block 14 and driving block 18 to two ends produce outside thrust, make

brake component

2 and 16 whiles of brake component outwards move and leave brake slipper 6, realize the releasing of normally closed braking, passive driven member is run well.When driving link loses active force, effect piece 13 rotates round about with sliding pin 5, the convex surface section of effect on the piece moved towards the concave surface section of driving block, thrust is eliminated, brake spring 3 and brake spring 20 act on respectively on brake component 2 and the brake component 16, or act on simultaneously on brake component 2 and the brake component 16 by connecting rod 12 by brake spring 3, two brake components are moved inward and close contact brake slipper 6 simultaneously, recover normally closed braking state.

In embodiment 2, brake component 2 and brake component 16 all also can be made of disk body 21 that has internal tooth and core body 22, the feather key 24 that is provided with braking compensation mechanism 23 between disk body 21 and the core body 22 and disk body and core body is turned round simultaneously or stop, this feather key 24 also is used to guarantee the balance of disk body along the core body mounting structure.In the present embodiment, the braking compensation mechanism on brake component 2 and the brake component 16 is symmetrically arranged.Brake slipper 6 is the biplate structure, is connected slidably by back shaft 30, in addition, in the centre of double-disk brake slipper 6, also is provided with a middle inner tray 29 on the connecting rod 12, the frictional force when being used to increase braking.This braking compensation mechanism is improved gear ring type structure, that is: the inner ring of disk body 21 is provided with gear ring 26, tooth piece 25 (seeing Fig. 8, Fig. 9) is set on the circumference of core body 22, on this tooth piece 25 external tooth that matches with gear ring 26 is arranged, the outside of each tooth is the inclined-plane, and the inboard is the vertical surface perpendicular to the transmission axis.Described gear ring 26 and tooth piece 25 can be that flank of thread cooperates, and the bottom of feather key 24 is provided with spring 28, and available screw is transferred feather key 24, make disk body 21 and the core body 22 can be along screw thread rotation, as manual tune friction gap.Tooth piece 25 is contained in the groove 27 that core body 22 along the circumferential direction forms, and the bottom of groove 27 is provided with the spring 27a (see figure 8) that acts on tooth piece 25.Tooth piece 25 is provided with in pairs, and this example is four pairs totally eight, and wherein part (this example is four, not blacking among Fig. 6) of in pairs evenly arranging is for contacting (see figure 8) fully.(among the Fig. 6 four of blacking) that arranges in pairs evenly in addition contacts (see figure 9) for part.Contact be working state fully, promptly when the core body of brake component driven by power switching mechanism and outside when moving, the drive disk body moves and brake off outward.When the thrust of power switching mechanism was removed, brake spring acted on core body, made disk body and brake slipper 6 close contact and realized braking.Tooth is in compensating coefficient for the tooth piece 25 of part contact, after the wearing and tearing to a certain degree of the quilt of the friction plate on the disk body, core body 22 is under the driving block effect, outside when mobile and disk body 21 produce relative movement, the active force that tooth piece 25 overcomes spring 27a moves down in groove, and the tooth on it slips on next gear ring of disk body, promptly is in contact fully, becoming working state, is that the tooth piece that contacts fully then becomes the compensating coefficient that part contacts originally.

What will emphasize here is, compensation mechanism 23 described in the present embodiment 2, can use in brake component of the present invention is other breaks of disc type by its principle, as described

later embodiment

3,4,5,6 etc.

Figure 10 shows embodiments of the invention 3.Equally, wherein same with the above-mentioned embodiment or similar parts mark with identical label.

Figure 10 is the sectional structure chart of present embodiment along axial direction.Present embodiment is a kind of modification on the basis of the foregoing description.Fixed base wherein is to be made of with two side plates 32 that are connected with these three two ends three coupling shafts 31.Brake slipper 6 is made up of two split type dishes 33, all is fixed on the

coupling shaft

31, and 16 of brake component 2 and brake components two split type dishes 33 with brake slipper 6 respectively are corresponding.Can make motion block 34 and servo-actuated inner tray brake component 35 between brake component 2 and brake component 16 and two split type dishes 33, brake slipper 34 is connected on the coupling shaft 31, and can move along this axle; The servo-actuated inner tray brake component 35 of coaxial line with it is set, the mutual corresponding clutch of rubbing surface of brake component, brake slipper and servo-actuated inner tray brake component in the side of brake slipper 34.So-called multidisc double disk structure like this, with driving link 11 as transition wheel.In the present embodiment, transition wheel is a driving gear 36, is arranged between the two split type dishes 33, and is sleeved on the axle 37.Axle 37 is passive driven member 9, again as 12 interconnect functions of connecting rod of brake component.Sliding pin 5 passes driving gear 36,

brake slipper

2,16 and servo-actuated inner tray brake component 35, and its two ends lay respectively in the sliding eye 7 of brake component 2 and brake component 16.Also sliding eye 7 can be changed into the cooperation that is connected with sliding pin 5, sliding eye 7a is located on the driving gear 36.Spring 3 and spring 20 are contained in the two ends of axle 37; Effect piece 13 in the power switching mechanism be two split type, be connected on the both ends of the surface of driving gear 36.When driving block 14 and driving block 18 produce when driving thrusts brake component 2 and brake component 16 respectively, two

brake components

2 and 16 overcome the active force of brake spring 3a and 20a respectively and move outward, make brake slipper 34, servo-actuated inner tray brake component 35 be in stress-free loosening state and be disengaged braking.When the thrust of

driving block

14 and 18 was eliminated, from the move effect of spring of two-system,

brake component

2 and 16 pairs of servo-actuated inner tray brake components 35, brake slipper 34 produced pressure, make it to move inward, and realize braking until mutual close contact.

When embodiment's 3 breaks are alleviated, if the active force of brake spring 3a and 20a is enough big, can limit

brake component

2,16 moves in limited range, also can be spacing by circlip 39 is set, they are moved limitedly, guarantee to make the unlikely male and female face of crossing driving block 14 of male and fomale(M﹠F) of effect piece 13.This kind structure can not established sliding pin and sliding eye, directly carries out the power transmission by effect piece 13 and driving block 14.Can as described in the embodiment 1, not make moving part 16 yet, have only brake component 2.

Figure 11-Figure 13 illustrates the 4th embodiment of the present invention, and wherein same with the above-mentioned embodiment or similar parts also indicate with identical label.

Present embodiment is the application example of embodiment 3 on speed reducer, and corresponding linkage structure is seen Figure 11 to Figure 13.Here, the biside plate 32 in the fixed base is connected with two inwalls of speed reducer casing respectively, and driving gear 36 is prime driving gear 38 engagements of driving link and speed reducer, and passive driven member is the take-off (propeller) shaft 37 of speed reducer.Identical about the coupling shaft among the figure 31, split type dish 33 and brake slipper 34 with embodiment 3, no longer repeat here.

Figure 14 illustrates the 5th embodiment of the present invention, and wherein same with the above-mentioned embodiment or similar parts indicate with identical label.

In embodiment 5, brake component 2 is the conical surface with the rubbing surface of fixed base 1.

Fixed base 1 directly is fixed on the driven member shell 40, the brake component 2 of band conical surface friction face comprises taper disk body 21 and core body 22, they adopt compensation mechanism similarly to Example 2, it is improved gear ring type structure (not shown), one end of connecting rod 12 is connected on the internal fixation plate 41, a bearing 42 is housed to reduce the frictional force of power switching mechanism in the middle of power switching mechanism 4 and the internal fixation plate 41.All the other members also have driving link 11, driven member 9, sliding pin 5 and spring 3 to repeat no more.

Figure 15 shows the 6th embodiment of the present invention, and wherein same with the above-mentioned embodiment or similar parts illustrate with identical label.

In the present embodiment, utilize active force and the breaking force of the gravity (referring to that driving link is in last vertical setting) of driving link 11, driven member 9, and do not need connecting rod as constraining force switching mechanism 4 finite displacements.The coupling compoonent of driving link shell 43 and following driven member shell 44 is equipped with bearing 42 between power switching mechanism 4 and the thrust plate 45 on the fixed base double as, simultaneously a bearing 46 is housed between driving link, driven member, to reduce friction.Brake component 2 also comprises disk body 21 and core body 22, can adopt aforementioned compensation mechanism between disk body 21 and the core body 22, also can be directly with screw-thread fit and be provided with key 47 and spring 48.The keyway position of disk body 21 is provided with screw 49, after the friction member abrasion, but with screw 49 key 47 is pushed up the position of turn, i.e. can regulate friction gap.

Figure 16-Figure 18 shows the 7th embodiment of the present invention.In this embodiment, identical or similar with the parts effect in the foregoing description parts mark with identical label.

The structure of present embodiment and the foregoing description is variant, and wherein power switching mechanism is to convert active force to radial force overcome the breaking force of spring and brake off.Fixed base 1 can be fixed on the driven member shell, also can be fixed on other positions.The inwall of fixed base 1 plays brake slipper, is labeled as 6a among the figure.Cylndrical surface on the brake slipper 6a is a brake area, is called braking cylndrical surface 50, and the form of brake component is hoof piece 2a and is hinged on the driven member 9 by supporting pin 51.The effect of effect piece 13a among the radial force switching mechanism 4a is served as by the front end of sliding pin 5a.The acting surface of driving block 14a is fitting surface 53 and directly is fixedly mounted on the hoof piece 2a that driving block 14a and hoof piece 2a also can be one here, and present embodiment promptly so.In order to reduce the driving friction of sliding pin 5a, its front end is provided with roll piece 52.Do not produce radial component in order to make between driving link 11, the driven member 9, radial force switching mechanism 4a should evenly be arranged as good with the motion center of circle with respect to moving body.Present embodiment adopts two symmetric arrangement.After driving link 11 gets active force, driving sliding pin 5a moves, roll piece 52 press fit faces 53 (seeing Figure 16) on it, produce the active force that downward radial component overcomes spring 3a, brake shoe 2a is radially moved inward, make the release of brake of braking cylinder 50, driving link 11, driven member 9 run well.After driving link 11 lost active force, sliding pin 5a relative engagement face 53 produced rightabout motion, recovered braking state under the effect of the active force of spring 3a.

Figure 19 shows the 8th embodiment of the present invention, and driving link wherein drives driven member moving linearly (i.e. the axial motion of left and right directions among the figure).

As shown in figure 19, brake component 2 connects into integral body with driving block 14, two brake components 2 lay respectively in the notch of biside plate of driven member 9, in the groove of effect piece 13 between brake component 2 and driving block 14, inclined-plane on the driving block 14 matches with the inclined-plane of effect on the piece 13, the two ends of spring 3 are connected with the inner of driving block 14 respectively, friction plate on brake component 2 outer side and the brake area clutch on the fixed base 1.When driving link 11 moving linearly after the active force because the ramp effect of effect piece 13, make driving block 14 pressure springs 3 and in move, brake component 2 and brake area are broken away from, thereby make the braking of driven member 9 is removed, driven member 9 is with driving link 11 motions.When driving link lost active force, spring 3 effects connected into whole effect piece 13 and brake component 2 and move from inside to outside, and brake component 2 contact brake areas are realized the braking to driven member 9.

Break of the present invention is provided with power switching mechanism in various corresponding structure as described in embodiment, utilize the active force of driving link to overcome breaking force brake off state, makes passive driven member and driving link keep running well.

Compared with the prior art, brake of the present invention has significant substantive distinguishing features, and it need not The additional force source apparatus is set, and simple in structure, in the normal operation process, save energy The source, braking is reliable, and the scope of application is very extensive. Particularly be applied to requirement of explosion proof when it The mining machinery device in the time owing to do not need extra power source (such as electromagnet etc.), yet Do not need to add explosion precaution, work is that overall safety is reliable again.

Brake of the present invention will in mine, metallurgy, lifting, building and common mechanical device Have wide practical use.

Claims

1, a kind of normally engaged brake, thus include driving link, driven member, can make driving link drive driven member along bindiny mechanism that first direction moves, have the fixed base of rubbing surface and be connected and can fit with the rubbing surface on the fixed base on the driven member or throw off and realize the braking that driven member is moved along first direction or the brake component of alleviation; It is characterized in that,

Described bindiny mechanism is arranged between described driving link and the driven member, and comprise that one can be carried out the effect piece of first direction motion and one jointly with driving link and can produce the driving block of the relative displacement of second direction with respect to this driven member again with the motion that driven member carries out first direction jointly;

Described effect piece and driving block have when driving link obtains active force or loses active force, can produce the cooperating structure of relative movement on second directions;

Described bindiny mechanism also comprises a qualification mechanism that is used for the relative movement distance of qualification effect piece and driving block.

2, break as claimed in claim 1 is characterized in that the described mechanism that limits comprises the spring of driving block being pressed to the effect piece.

3, as claim 1,2 described breaks, it is characterized in that described qualification mechanism comprises and connect a dish on the described driving link, be provided with a plurality of bearing pins outside the center of this dish; A dish on the described driven member is provided with a plurality of slotted holes along the circular arc direction corresponding to the position of described bearing pin.

4, as claim 2,3 described breaks, the cooperating structure that it is characterized in that producing between the acting surface of described effect piece and driving block relative movement is the cam cooperating structure, and any one side in the acting surface of the acting surface of described effect piece and described driving block is a camming surface.

5, break as claimed in claim 4 is characterized in that the acting surface of described effect piece and driving block is camming surface.

6,, it is characterized in that the axial direction that has along the rotation driven member produces the driving block of second direction displacement as claim 4,5 described breaks.

7,, it is characterized in that the radial direction that has along the rotation driven member produces the driving block of second direction displacement as claim 4,5 described breaks.

8,, it is characterized in that having the move along a straight line Vertical direction of driven member and produce the driving block of second direction displacement as claim 4,5 described breaks.

9, break as claimed in claim 6, it is characterized in that having along two end faces of rotation driven member axial direction is the effect piece of the cooperating structure that cooperates with two driving blocks respectively.

10, break as claimed in claim 6 it is characterized in that the corresponding disc braking part of a described driving block, and the braking surface of described disc braking part is the conical surface or plane.

11, break as claimed in claim 6 is characterized in that described driving block is two, respectively corresponding two disc braking parts, and also the brake area of described disc braking part is the conical surface or plane.

12, break as claimed in claim 11 is characterized in that being provided with inner tray between the two disc braking parts.

13, as claim 10,11,12 described breaks, it is characterized in that the disc braking part is corresponding with split type dish, described driving link is a transition wheel.

14, break as claimed in claim 10 is characterized in that break is located at the inside of retarder, and described driving link is a transition gear, and described driven member is the output shaft of retarder.

15, as claim 11,12 described breaks, it is characterized in that break is located at the inside of retarder, described driving link is a transition gear, described driven member is the output shaft of retarder.

16,, it is characterized in that described driving link and driven member are upper and lower settings as claim 6,10 described breaks.

17, as claim 6,9,10,11,12,13,14,15, any described break in 16, the dish that it is characterized in that described brake component and described driven member is structure as a whole, and the integrative-structure of described brake component and dish comprises a disk body and a core body with ring gear, the feather key that is provided with compensation mechanism between described disk body and the described core body and disk body and core body are moved along first direction jointly, described compensation mechanism comprises the groove that is positioned at core edge, be arranged in this groove and have tooth piece tooth and that can cooperate with described disk body, and the spring between the bottom of described tooth piece and described groove.

18, break as claimed in claim 7 is characterized in that described driving block evenly arranges, described effect piece is served as by the front end of slidiing pin and is provided with roll piece.