CN215160553U

CN215160553U - Hoist protection device of hoist

Info

Publication number: CN215160553U
Application number: CN202120552823.0U
Authority: CN
Inventors: 羊依林; 李青; 蒲开燕; 岳映峰
Original assignee: Sichuan Pangyuan Machinery Engineering Co ltd
Current assignee: Sichuan Pangyuan Machinery Engineering Co ltd
Priority date: 2021-03-17
Filing date: 2021-03-17
Publication date: 2021-12-14
Anticipated expiration: 2031-03-17

Abstract

The utility model discloses a hoisting protection device of a crane, which comprises a bracket, a winding drum and a rotating shaft which are arranged on the top of the bracket, and a chuck, push pedal and pneumatic telescopic link, the both ends of rotation axis are power end and braking end respectively, the disc of chuck for having circular recess, the tip of circular recess and reel matches, the middle part that the braking end of rotation axis passed the chuck can be dismantled with the chuck and be connected, the top of support is equipped with the spout along the rotation axis direction, the bottom of push pedal is equipped with the slider that matches with the spout, the push pedal is equipped with the screw hole along the rotation axis direction, the braking end of rotation axis can be dismantled with the screw hole of push pedal and be connected, the chuck is located between push pedal and the reel, be equipped with the rotatory screw thread that matches with the screw hole on the rotation axis between push pedal and the chuck, pneumatic telescopic link locates the top of support, pneumatic telescopic link's flexible direction is the same with the direction of spout. The utility model discloses a hoist protection device of hoist has the braking in time, advantage safe in utilization.

Description

Hoist protection device of hoist

Technical Field

The utility model relates to a hoist field especially relates to a hoist protection device of hoist.

Background

The hoist of hoist is the important component of hoist, and in the working process of hoist, mechanical failure can appear, needs emergency braking to overhaul, and the thing of hoisting to the high position of hoist breaks down and can take place dangerously if, overhauls after needing to put down the thing of hoisting, needs the low-speed to go on when putting down the thing of hoisting, prevents to cause great impact and damage the hoist to the hoist.

SUMMERY OF THE UTILITY MODEL

To the above problem, the utility model provides a hoist protection device of hoist has the braking in time, advantage safe in utilization.

The technical scheme of the utility model is that:

a hoisting protection device of a crane comprises a bracket, a winding drum and a rotating shaft which are arranged at the top of the bracket, a chuck, a push plate and a pneumatic telescopic rod, the two ends of the rotating shaft are respectively a power end and a brake end, the chuck is a disc with a circular groove, the circular groove is matched with the end part of the winding drum, the braking end of the rotating shaft passes through the middle part of the chuck and is detachably connected with the chuck, the top of the bracket is provided with a sliding groove along the direction of the rotating shaft, the bottom of the push plate is provided with a sliding block matched with the sliding groove, the push plate is provided with a threaded hole along the direction of the rotating shaft, the braking end of the rotating shaft is detachably connected with the threaded hole of the push plate, the chuck is arranged between the push plate and the winding drum, a rotating shaft between the push plate and the chuck is provided with a rotating thread matched with the threaded hole, the pneumatic telescopic rod is arranged at the top of the support, and the telescopic direction of the pneumatic telescopic rod is the same as the direction of the sliding groove.

The working principle of the technical scheme is as follows:

when putting down the heavy object when hoist emergency braking, start pneumatic telescopic rod extension and promote the push pedal and remove towards the chuck along the rotation axis, pneumatic telescopic rod stops when the push pedal removes to the rotatory epaxial rotatory screw thread of rotation, rotatory screw thread rotation and screw hole cooperation back on the rotation axis, the reel begins to slow down because of the friction of screw hole and rotatory screw thread, drive the push pedal and continue to remove towards the chuck direction, push pedal promotes chuck and reel laminating behind push pedal and the chuck laminating, the reel further slows down gradually with the chuck friction, the push pedal drives the chuck and presss from both sides tight reel, accomplish the braking when hoist puts down the heavy object.

On the basis of the original braking device of the crane, the clamping of the winding drum by the push plate is completed by utilizing the matching of the rotating threads on the rotating shaft and the threaded holes on the push plate, the winding drum can be decelerated by the resistance of the rotating threads in the threaded holes when rotating, the falling speed of a hoisted object is reduced, the impact on the winding drum when falling is reduced, the chuck is further decelerated after being attached to the winding drum, and the safety of the winding drum is ensured; the device starts simply, accomplishes the speed reduction automatically after starting, and pneumatic telescopic link can open alone, and the arresting gear trouble of instant hoist also can stretch out and draw back, guarantees safe handling.

In a further technical scheme, be equipped with the buffering friction pad in the circular recess of chuck, reduce the impact of chuck and reel, the convenient change of buffering friction pad prevents that long-time friction from leading to frictional force to reduce.

In a further technical scheme, be equipped with the spring chucking piece in the circular recess of chuck, the spring chucking piece is including chucking piece and spring, chucking piece and circular recess are connected respectively to the both ends of spring, be equipped with the chucking groove that matches with the spring chucking piece on the reel, make things convenient for chuck and reel closely to laminate, prevent chuck and reel relative slip after the laminating, prevent that the reel from rotating again after the tight reel of push pedal clamp, further improve the security.

In a further technical scheme, the push pedal is equipped with the ejector pin mounting hole along the spout direction, be equipped with the slip ejector pin in the ejector pin mounting hole, the length of slip ejector pin is greater than the ejector pin mounting hole, the one end that the slip ejector pin is close to the chuck is equipped with the kicking block, and the kicking block can promote chuck and reel laminating in advance, reduces the time of braking.

The utility model has the advantages that:

1. the lifting device is safe to put down a high-altitude lifted object when the crane fails, is independently controlled, and is not easy to lose efficacy when the crane fails;

2. the chuck is provided with a buffering friction pad, so that the friction and impact between the chuck and the winding drum are reduced, and the service life is prolonged;

3. the safety is high, and the braking effect is good;

4. the braking time is short.

Drawings

Fig. 1 is a cross section of a hoisting protection device of a crane according to an embodiment of the present invention, the cross section is schematically illustrated in structure;

fig. 2 is a schematic structural diagram of a chuck according to an embodiment of the present invention.

Description of reference numerals:

1. a support; 11. a chute; 2. a drive section; 3. a reel; 31. a power end; 32. a brake end; 321. rotating the screw thread; 4. a chuck; 41. a compression spring; 42. a clamping block; 5. pushing the plate; 51. sliding the ejector rod; 6. a pneumatic telescopic rod; 61. a telescopic push block.

Detailed Description

The embodiments of the present invention will be further explained with reference to the drawings.

Example (b):

as shown in fig. 1-2, a hoisting protection device of a crane comprises a support 1, a driving part 2 arranged at the top of the support 1, a winding drum 3 and a rotating shaft, and further comprises a chuck 4, a push plate 5 and a pneumatic telescopic rod 6, wherein the two ends of the rotating shaft are respectively a power end 31 and a braking end 32, the power end 31 is connected with the driving part 2, the chuck 4 is a disc with a circular groove, the circular groove is matched with the end part of the winding drum 3, the braking end 32 of the rotating shaft passes through the middle part of the chuck 4 and is detachably connected with the chuck 4, the top of the support 1 is provided with a sliding groove 11 along the rotating shaft direction, the bottom of the push plate 5 is provided with a sliding block matched with the sliding groove 11, the push plate 5 is provided with a threaded hole along the rotating shaft direction, the braking end 32 of the rotating shaft is detachably connected with the threaded hole of the push plate 5, the chuck 4 is arranged between the push plate 5 and the winding drum 3, the rotating shaft between the push plate 5 and the chuck 4 is provided with a rotating thread 321 matched with the threaded hole, the pneumatic telescopic rod 6 is arranged at the top of the support 1, and the telescopic direction of the pneumatic telescopic rod 6 is the same as the direction of the sliding groove 11.

The working principle of the technical scheme is as follows:

when putting down the heavy object when hoist emergency braking, drive division 2 drives power end 31 and rotates or loosen original arresting gear and make the heavy object whereabouts towards the direction that the heavy object was put down, it promotes push pedal 5 and removes towards chuck 4 along the rotation axis to start 6 extensions of pneumatic telescopic link, pneumatic telescopic link 6 stops when push pedal 5 removes to rotatory epaxial rotatory screw thread 321, rotatory epaxial rotatory screw thread 321 is rotatory after going into the screw hole, reel 3 begins to slow down because of the friction of screw hole and rotatory screw thread 321, it continues towards chuck 4 direction removal to drive push pedal 5, push pedal 5 promotes chuck 4 and reel 3 laminating after 5 and 4 laminating of chuck, after 3 and 4 frictions of chuck further slow down gradually, push pedal 5 drives 4 tight reel 3 of chuck, accomplish the braking when hoist puts down the heavy object.

On the basis of the original braking device of the crane, the clamping of the winding drum 3 by the push plate 5 is completed by utilizing the matching of the rotary threads 321 on the rotary shaft and the threaded holes on the push plate 5, the winding drum 3 can be decelerated by the resistance of the rotary threads 321 when rotating in the threaded holes, the falling speed of a hoisted object is reduced, the impact on the winding drum 3 when falling is reduced, the chuck 4 is further decelerated after being attached to the winding drum 3, and the safety of the winding drum 3 is ensured; the device starts simply, accomplishes the speed reduction automatically after starting, and pneumatic telescopic link 6 can open alone, and the arresting gear trouble of instant hoist also can stretch out and draw back, guarantees safe handling.

In another embodiment, a buffering friction pad is arranged in the circular groove of the chuck 4, the impact between the chuck 4 and the winding drum 3 is reduced after the circular groove of the chuck 4 is attached to the winding drum 3, the buffering friction pad is convenient to replace, and the friction force reduction caused by long-time friction is prevented.

In another embodiment, as shown in fig. 1 and 2, a spring clamping block 42 is disposed in the circular groove of the chuck 4, the spring clamping block 42 includes a clamping block 42 and a spring, the two ends of the spring are respectively connected with the clamping block 42 and the circular groove, a clamping groove matched with the spring clamping block 42 is disposed on the reel 3, the chuck 4 and the reel 3 can rotate relatively after being attached, at this time, the clamping block 42 of the chuck 4 is compressed to be parallel to the circular groove, when the clamping block 42 rotates to the clamping groove, the compression spring 41 springs the clamping block 42 into the clamping groove, the chuck 4 and the reel 3 are prevented from sliding relatively, the reel 3 is prevented from rotating again after the push plate 5 clamps the reel 3, and safety is further improved.

In another embodiment, as shown in fig. 1, the push plate 5 is provided with an ejector rod mounting hole along the direction of the sliding groove 11, a sliding ejector rod 51 is arranged in the ejector rod mounting hole, the length of the sliding ejector rod 51 is greater than that of the ejector rod mounting hole, an ejector block is arranged at one end of the sliding ejector rod 51 close to the chuck 4, the ejector block can push the chuck 4 to be attached to the winding drum 3 when the push plate 5 just contacts the rotating thread 321, the speed of the push plate 5 does not need to be reduced after the push plate 5 is attached to the chuck 4, the speed of the push plate can be reduced in time, and the braking time is reduced.

In another embodiment, as shown in fig. 1, the pneumatic telescopic rod 6 is provided with a telescopic push block 61, so that the force bearing area of the push plate 5 is increased, and the push plate 5 is easier to push.

The above-mentioned embodiments only express the specific embodiments of the present invention, and the description thereof is specific and detailed, but not construed as limiting the scope of the present invention. It should be noted that, for those skilled in the art, without departing from the spirit of the present invention, several variations and modifications can be made, which are within the scope of the present invention.

Claims

1. A hoisting protection device of a crane comprises a support, a winding drum and a rotating shaft, wherein the winding drum and the rotating shaft are arranged at the top of the support, the hoisting protection device is characterized by further comprising a chuck, a push plate and a pneumatic telescopic rod, the two ends of the rotating shaft are respectively a power end and a braking end, the chuck is a disc with a circular groove, the circular groove is matched with the end of the winding drum, the braking end of the rotating shaft penetrates through the middle part of the chuck to be detachably connected with the chuck, the top of the support is provided with a sliding groove along the rotating shaft direction, the bottom of the push plate is provided with a sliding block matched with the sliding groove, the push plate is provided with a threaded hole along the rotating shaft direction, the braking end of the rotating shaft is detachably connected with the threaded hole of the push plate, the chuck is arranged between the push plate and the winding drum, a rotating thread matched with the threaded hole is arranged on the rotating shaft between the push plate and the chuck, the pneumatic telescopic rod is arranged at the top of the support, the telescopic direction of the pneumatic telescopic rod is the same as the direction of the sliding groove.

2. The hoisting protection device of claim 1, wherein the circular groove of the chuck is provided with a buffering friction pad.

3. The hoisting protection device of claim 1, wherein the circular groove of the chuck is provided with a spring clamping block, the spring clamping block comprises a clamping block and a spring, two ends of the spring are respectively connected with the clamping block and the circular groove, and the winding drum is provided with a clamping groove matched with the spring clamping block.

4. The hoisting protection device of claim 2, wherein the push plate is provided with a top rod mounting hole along the sliding groove, a sliding top rod is arranged in the top rod mounting hole, the length of the sliding top rod is greater than that of the top rod mounting hole, and a top block is arranged at one end of the sliding top rod close to the chuck.