CN101293622A - Second brake of electric hoist - Google Patents
Second brake of electric hoist Download PDFInfo
- Publication number
- CN101293622A CN101293622A CNA2008100501635A CN200810050163A CN101293622A CN 101293622 A CN101293622 A CN 101293622A CN A2008100501635 A CNA2008100501635 A CN A2008100501635A CN 200810050163 A CN200810050163 A CN 200810050163A CN 101293622 A CN101293622 A CN 101293622A
- Authority
- CN
- China
- Prior art keywords
- brake
- cam
- ratchet
- reel
- swing arm
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Landscapes
- Braking Arrangements (AREA)
Abstract
The invention relates to a brake, in particular to a second brake of an electric hoist. The invention aims at providing the second brake of the electric hoist which has long service life and can carry out the brake only when a first brake is failed or other malfunctions occur. The key point of the technical proposal of the invention is that the second brake of the electric hoist comprises a drum which is provided with an open brake ring; an open cam and a ratchet wheel are arranged on the brake ring outside the drum; two screws respectively pass through thread holes which are arranged in the cam and the open end surface of the ratchet wheel; the threads of the screws are matched with thread holes which are arranged in the cam and the other open end surface of the ratchet wheel; the upper part of the thread hole is provided with a step hole which is corresponding to the internal end surface of the end of the screw; the circumferential surface of the cam is uniformly provided with arc troughs; the connection between two arc troughs is an externally convex arc surface; the circumferential surface of the ratchet wheel is uniformly provided with pawl troughs. The second brake of the invention is used for the electric hoists.
Description
Technical field:
The present invention relates to a kind of drg, particularly trace electric block second drg.
Background technology:
In the lifting field, existing drg is the normally closed structure, and promptly drg packs tightly brake wheel when no power, and energising rear brake band-type brake unclamps operating unit work.In the dangerous work environment, hoisting crane or electric block are for safety, second drg is established in requirement, make second drg with existing normally closed brake, its drawback be switch on and the no power drg all in running order, thereby its service life will shorten, this drg can not play long-term safety effect.
Summary of the invention:
Second drg of the electric block that the purpose of this invention is to provide a kind of long service life and only just brake at first brake failure or when other faults take place.Technical scheme of the present invention is, a kind of second drg of electric block, comprise reel, it is characterized in that: reel is provided with the brake hoop of opening, the cam of opening and ratchet place on the outer brake hoop of reel, two screws are through at respectively in the screw thread via hole in cam and the ratchet open end, tapped bore in its screw thread and cam and the ratchet opening other end matches, the top of above-mentioned screw thread via hole has a stepped hole relative with the termination inner end surface of screw, uniform deep-slotted chip breaker on the side face of cam, junction between two deep-slotted chip breakers is the arcwall face of evagination, uniform pawl slot on the side face of ratchet; Be provided with the bearing that is connected with the reel outer cover in the outside of cam and ratchet, the middle part of swing arm and the axle normal-running fit that is fixed on the bearing, the upper end of above-mentioned swing arm is provided with roller and contacts with the deep-slotted chip breaker side face of cam, the pawl slot that its lower end is provided with on ratchet and the ratchet matches, one end of spring is connected with the reel outer cover, and the other end is connected with swing arm.It is relative with the lip-deep convex body of swing arm to be provided with travel switch on another surface of bearing.The present invention has long service life and compared with the prior art only at first brake failure or the remarkable advantage that broken teeth, off-axis takes place or can brake drum when having a power failure weight is not fallen.
Description of drawings:
Fig. 1 is the front view of the present invention's second drg, and Fig. 2 is the back view of Fig. 1.
The specific embodiment:
In conjunction with the present invention being said in detail with accompanying drawing, on the outer peripheral face of reel 3 one ends, be provided with brake hoop 2, ratchet 1 and cam 15, place on the outer brake hoop of reel, be evenly equipped with ratchet slot 13 on the periphery of ratchet, being evenly equipped with deep-slotted chip breaker 14 on the periphery of cam, is the cambered surface of an evagination between the deep-slotted chip breaker.On reel outer cover 10, be fixed with a bearing 9, the middle part of swing arm 5 and axle 11 normal-running fiies that are fixed on the bearing, the upper end of swing arm one side is provided with roller 4 and contacts with the deep-slotted chip breaker side face of cam, the pawl slot that is provided with on ratchet 12 and the ratchet in the lower end of its opposite side matches, one end of spring 6 is fixed, the other end is connected with swing arm, and ratchet breaks away from ratchet surface under the normal condition of spring, can not insert in the pawl slot.It is relative with face of cylinder convex body 7 in the swing arm that bearing is provided with travel switch 8.The purpose that brake hoop is set is the instant impact in order to slow down ratchet and to enter ratchet slot, avoids stop mechanism is produced damage.This friction braking, must make ratchet, connection between brake hoop and the reel is tight, for this reason, brake hoop is made opening and the girth girth less than reel, itself and reel are fitted tightly, in order to make ratchet, cam can be fitted closely with reel, guarantee to have enough big friction brake torque, between the open end of annulus, be provided with elastic cushion block, establish tapped blind hole in the end face of opening annulus, it is relative with above-mentioned tapped blind hole to be provided with the screw thread via hole in the other end of opening annulus, and screw passes the screw thread via hole and screws in the tapped blind hole, the screw head end face places on the stepped hole end face of screw thread via hole upper end, makes cam and the ratchet and the brake hoop of opening, reel is held tightly.
Principle of work of the present invention is, electric block is when hoisting weight, when first brake failure or occur that axle is disconnected, during the disconnected weight free fall of tooth, when drum speed reaches certain rotating speed (normal speed 1.25 times), the amplitude that the centnifugal force of the roller of camming action in swing arm makes swing arm outwards get rid of pendulum increases, and overcomes spring force, and ratchet inserts in the ratchet slot, reel is stopped operating, and this moment, weight was parked in the air.When the swing of swing arm, the convex body in the swing arm is depressed travel switch, makes the outage of decline contactless switch can not descend and can only rise.Drop on the ground in order to be suspended in aerial weight, can press the rising button, reel rising (with the switched in opposite that descends), ratchet spins off from pawl slot under the effect of spring, close the rising button, reel stops to rise, behind the free fall certain distance, braked once more, repeatedly repeat above-mentioned action weight safety is dropped on the ground.
Claims (2)
1, a kind of second drg of electric block, comprise reel, it is characterized in that: reel is provided with the brake hoop of opening, the cam of opening and ratchet place on the outer brake hoop of reel, two screws are through at respectively in the screw thread via hole in cam and the ratchet open end, tapped bore in its screw thread and cam and the ratchet opening other end matches, the top of above-mentioned screw thread via hole has a stepped hole relative with the termination inner end surface of screw, uniform deep-slotted chip breaker on the side face of cam, junction between two deep-slotted chip breakers is the arcwall face of evagination, uniform pawl slot on the side face of ratchet; Be provided with the bearing that is connected with the reel outer cover in the outside of cam and ratchet, the middle part of swing arm and the axle normal-running fit that is fixed on the bearing, the upper end of above-mentioned swing arm is provided with roller and contacts with the deep-slotted chip breaker side face of cam, the pawl slot that its lower end is provided with on ratchet and the ratchet matches, one end of spring is connected with the reel outer cover, and the other end is connected with swing arm.
2, second drg of a kind of electric block as claimed in claim 1 is characterized in that: it is relative with the lip-deep convex body of swing arm to be provided with travel switch on another surface of bearing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2008100501635A CN101293622A (en) | 2008-06-27 | 2008-06-27 | Second brake of electric hoist |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2008100501635A CN101293622A (en) | 2008-06-27 | 2008-06-27 | Second brake of electric hoist |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101293622A true CN101293622A (en) | 2008-10-29 |
Family
ID=40064218
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA2008100501635A Pending CN101293622A (en) | 2008-06-27 | 2008-06-27 | Second brake of electric hoist |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101293622A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102858675A (en) * | 2010-02-25 | 2013-01-02 | 科尼起重机设备有限公司 | Cable pull comprising an emergency braking device |
| CN103663227A (en) * | 2013-12-24 | 2014-03-26 | 国家电网公司 | Engine-driven grinding tail rope controller |
| CN107434216A (en) * | 2017-04-11 | 2017-12-05 | 广州元凛建筑工程技术开发有限公司 | A kind of firm power equipment |
-
2008
- 2008-06-27 CN CNA2008100501635A patent/CN101293622A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102858675A (en) * | 2010-02-25 | 2013-01-02 | 科尼起重机设备有限公司 | Cable pull comprising an emergency braking device |
| CN102858675B (en) * | 2010-02-25 | 2015-03-11 | 科尼起重机设备有限公司 | Cable pull comprising an emergency braking device |
| CN103663227A (en) * | 2013-12-24 | 2014-03-26 | 国家电网公司 | Engine-driven grinding tail rope controller |
| CN107434216A (en) * | 2017-04-11 | 2017-12-05 | 广州元凛建筑工程技术开发有限公司 | A kind of firm power equipment |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN203214717U (en) | Intelligent brake | |
| CN101293622A (en) | Second brake of electric hoist | |
| CN206783054U (en) | Elevator governor for car accidental movement | |
| CN203607269U (en) | Weightlessness brake switch of elevator main hoisting pulley | |
| CN101293623A (en) | Double-brake electric hoist | |
| CN104627773A (en) | Independent elevator quick-response multi-level security defending system | |
| CN201250077Y (en) | Second brake gear of electric hoist | |
| CN202296959U (en) | Steel wire rope looseness detection device and parking equipment employing same | |
| CN201250078Y (en) | Double-braking electric block | |
| CN202785350U (en) | Power failure device in disengagement of steel wire rope of gantry crane | |
| CN109655028B (en) | Device for detecting abrasion degree of friction plate of brake | |
| CN201400545Y (en) | Forced brake type electric hoist | |
| CN202156850U (en) | Elevator speed limiter | |
| CN204079063U (en) | It is a kind of that bead coil is passive leads opening mechanism | |
| CN108275534A (en) | A kind of elevator governor | |
| CN210599822U (en) | Based on informationization this ampere of type beam-pumping unit crank pin assembly | |
| CN101503170A (en) | Forced brake type electric hoist | |
| CN207861650U (en) | A kind of brake device for elevator | |
| CN210286515U (en) | Double-contracting brake electrical control system of crane hoisting mechanism | |
| CN203214727U (en) | Automatic compensation device of brake | |
| CN202671100U (en) | Safety protection brake device of electric hoist | |
| CN210339994U (en) | Anti-falling safety device of construction elevator | |
| CN201713259U (en) | Working braking device for mine hoisting winch | |
| CN206511776U (en) | A kind of elevator governor | |
| CN101205046B (en) | Harbor crane lifting clutch |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Open date: 20081029 |