CN2172272Y

CN2172272Y - Open/close brake

Info

Publication number: CN2172272Y
Application number: CN 93225972
Authority: CN
Inventors: 于同工
Original assignee: SHANGHAI PORT MECHANICAL MANUFACTURE PLANT MINISTRY OF COMMUNICATIONS
Current assignee: SHANGHAI PORT MECHANICAL MANUFACTURE PLANT MINISTRY OF COMMUNICATIONS
Priority date: 1993-07-03
Filing date: 1993-07-03
Publication date: 1994-07-20
Anticipated expiration: 2003-07-03

Abstract

The utility model relates to an open / close type brake, which is used for a crane moving mechanism. The utility model comprises a braking part and an impelling part. The braking part is composed of a base (1), a brake scotch (2), a brake arm (3), a spring bracket (4), a screw rod (5), a lever (6) and a closing bearing pin (17). The impelling part is composed of a hydraulic push rod (7), a breadthways connecting plate (8) and a hydraulic pressure impel device (9). The utility model is characterized in that a switching-on positioning part is also provided. The switching on positioning part is composed of a positioning plate (10), a switching on arm (11), a V-shaped plate (12), a soft chain shaft (13), a tractive magnet (14), a positioning shaft (15) and a base plate (16). The utility model has performances which are different from the performances of a general normally closed brake. The utility model can be used on a lift, an amplitude of variation and a rotation mechanism of a crane, and when the crane moving mechanism does not work, the crane moving mechanism is in an open and releasing brake state. The open and releasing brake or the normally closed brake can be realized at any time according to different requirements. The utility model has the advantages of simple structure and low cost, and thereformation adopted by a new machine or an old machine is all easy to carry out.

Description

Open/close brake

The utility model relates to a kind of brake component that is that is used for crane travelling gear.

What at present, traveling gear extensively adopted is YWZ series power hydraulic pressure push rod block brake.This is a kind of normally closed brake, is grouped into by brake portion and pushing part.During traveling gear work, the spring force effect that the hydraulic push rod of drg promotion part overcomes brake portion makes brake scotch open to both sides, the take-off the brake wheel, and the wheel that gives way away rotates; When traveling gear quit work, the action of the spring of drg brake portion made the brake scotch tight brake wheel of stopping, and wheel promptly can not rotate.Often just hoist in hoisting crane work, during the work of luffing, swing type mechanism, traveling gear is in off position, this moment, the normally closed brake of traveling gear was in braking state.Because traveling gear is braked device constraint, wheel can not freely move about, and hoists, the force of inertia of luffing, gyroscopic movement produces very big dynamic-load stress at door frame and big bassinet structure place, very easily causes the cracking and the damage of structure.Therefore the hoisting crane user drg of wishing to walk has the performance that is different from general normally closed brake: when whole hoisting crane was not worked, drg can be in normally closed braking state; In hoisting crane work, just hoist, in the luffing, three mechanisms of revolution, has mechanism's work at least, when traveling gear was not worked, the walking drg can also be in the state that declutches of opening, at this moment as needing, the driver still can operate control, make the walking drg get back to the normally engaged brake state, at any time, traveling gear can both stop.General power hydraulic pressure push rod block brake can't satisfy above-mentioned requirements because of being subjected to its structure and Effect on Performance.Experimental results show that the fluid power pusher turns round continuously through the long-term of a period of time, the oil temperature rises very fast, is directed at the no part damage of sealing, therefore be not suitable for doing the long-term work running, tractive magnet then can be selected 100% work system for use, allow to work long hours, and consumed power is little.

The purpose of this utility model is to provide a kind of can be in normally closed braking state when hoisting crane is not worked; In hoisting crane work and traveling gear can be in the state that declutches of opening when not working, also can be according to different situations, different needs can be opened at any time and declutch or the open and close type drg that is used for crane travelling gear of normally closed braking.

The utility model reaches by following measures: increase tractive magnet device (mainly containing V-type plate, chain flexible axle, tractive magnet) and one group of framing member (mainly contain locating plate, open arm, fix shaft) in existing power hydraulic pressure push rod block brake.By two pin-and-holes on the locating plate and a minor axis, be installed in the brake control lever both sides that drg links to each other with arm-tie with opening arm.Open arm and play a lever, the front end of its galianconism part place two hydraulic push rods of drg prolongation tranverse connecting plate under, long-armed part is passed through V-type plate, soft chain rivet links to each other with tractive magnet, this part forms the unlatching localization part, so just constituted the open and close type drg that is different from normally closed brake, just can realize above-mentioned purpose by means of electrical control.

The concrete working process of open and close type drg is as follows:

First working process: finish by brake portion and promotion part.With above-mentioned normally closed brake working process.

Second working process:, promote part and finish with the unlatching localization part by brake portion.

After hoisting crane drove to control position, traveling gear quit work, and the walking drg is finished first working process.This moment, hoisting crane was started working, as long as operation hoists, any one mechanism starts working in the luffing, three mechanisms of revolution, the walking drg then begins second working process.Drg fluid power impeller motor must be established the beginning by cable and declutch, after time several seconds, tractive magnet gets electric, and will open brachium arm one end by V-type plate and pull down, because leverage, the front end of opening arm galianconism part withstands under the tranverse connecting plate of fluid power push rod, the state thereby the unlatching that makes the unlatching arm be positioned drg is declutched, after time several seconds, hydraulic push rod electrical motor dead electricity, then open arm by the tractive magnet effect fully and keep the hydraulic push rod height, keep drg to be in and open the state that declutches; When three mechanisms of hoisting crane all quit work above certain hour (general 2～3 minutes), control system thinks that hoisting crane enters the shutdown off position, the automatic dead electricity of tractive magnet meeting, drg band-type brake under the retarding spring effect, traveling gear is in braking mode; When crane hoisting, luffing, swing type mechanism work needed traveling gear also to participate in work, tractive magnet is dead electricity automatically also, and switching drg second working process is died away, and enters first working process automatically, and traveling gear is in running order.Obviously, when lifting opportunity sudden power, the open and close type drg is automatic band-type brake effectively, makes traveling gear be in normally closed braking mode.

The utility model can solve problems such as portal gantry and cart structure crack, thereby has prolonged the service life of hoisting crane.The utility model is simple in structure, install additional conveniently, cheap, ten kilograms of extension set total weight less thaies install a cover additional and only need about 180 yuan of Renminbi; Both can on the hoisting crane of coming of new, adopt, can on a large amount of existing hoisting cranes in use, promote easily again.

Fig. 1 is the front elevation of the utility model concrete structure.

Fig. 2 is the birds-eye view of the utility model concrete structure.

Fig. 3 is the lateral plan of the utility model concrete structure.

Fig. 4 is a locating plate, opens the connection diagram of arm and brake control lever.

Now in conjunction with the accompanying drawings the utility model is specified.

The utility model is formed brake portion by base 1, brake scotch 2, brake control lever 3, spring frame 4, screw rod 5, lever 6, connection bearing pin 17, form the promotion part by fluid power push rod 7, cross bar plate 8, hydraulic driver 9, form by locating plate 10, unlatching arm 11, V shaped slab 12, soft chain rivet 13, tractive magnet 14, fix shaft 15, base plate 16 and open localization part.About locating plate 10 has two, be installed in the outside of the brake control lever 3 that links to each other with lever 6 respectively.About opening arm 11 and having two, and form a framework by two fix shafts 15, opening arm 11 galianconism is 1:3 with long-armed ratio, and its fulcrum is positioned on the locating plate 10.Hydraulic push rod tranverse connecting plate 8 is prolonged along the brake wheel axial direction, and the front end holder of opening arm 11 galianconism is below the tranverse connecting plate 8 that has prolonged.Open arm 11 long-armed front ends and link to each other with V shaped slab 12 tops by fix shaft 15, V shaped slab 12 is connected with tractive magnet 14 by soft chain rivet 13.Base plate 16 is fixed by bolts on the base 1.

Two pin-and-holes (10-2) and a short pin shaft (10-1) are arranged on the locating plate 10, and locating plate 10 is installed in the outside of brake control lever 3 by two pin-and-holes (10-2) and the cooperation that is connected bearing pin 17.Opening on the arm 11 has fulcrum hole (11-1), by with locating plate on hinged cooperation of short pin shaft (10-1), be positioned the outside of left and right sides locating plate.(copper sheathing (18) is equipped with in the hinged cooperation place of 11-10, and fix shaft (15) is equipped with T type copper sheathing 19 with the shaft connection place, hole of V shaped slab (12) with opening the arm fulcrum hole at locating plate short pin shaft (10-1).

Claims

1, a kind of open and close type drg that is used for crane travelling gear, comprise brake portion and promote part, by sitting (1) in the end, brake scotch (2), brake control lever (3), spring frame (4), screw rod (5), lever (6), connect bearing pin (17) and form brake portion, by fluid power push rod (7), tranverse connecting plate (8), hydraulic driver (9) is formed the promotion part, it is characterized in that: the unlatching localization part also is set, and described unlatching localization part is by locating plate (10), open arm (11), V shaped slab (12), soft chain rivet (13), tractive magnet (14), fix shaft (15), base plate (16) is formed.

2, according to the described open and close type drg of claim 1, it is characterized in that locating plate (10) have about two, two pin-and-holes (10-2) and a short pin shaft (10-1) are arranged on the locating plate (10), by two pin-and-holes (10-2) and the cooperation that is connected bearing pin (17), be installed in the outside of the brake control lever (3) that links to each other with lever (6) respectively.

3, according to the described open and close type drg of claim 1, about it is characterized in that opening arm (11) and having two, and by two fix shafts (15) composition, one framework, opening arm (11) galianconism is 1:3 with long-armed ratio, its fulcrum is positioned on the locating plate (10), the front end holder of galianconism is below the tranverse connecting plate (8) that has prolonged, and long-armed front end links to each other with V shaped slab (12) top by fix shaft (15).