CN215326645U - Safety brake device for lifting mechanism - Google Patents

Abstract

The utility model provides a safety brake device for hoist mechanism, including being the circular shape ratchet, the pilot hole has been seted up in the centre of ratchet, the ratchet passes through pilot hole and hoist mechanism's axis of rotation right-hand member fixed connection, the ratchet top is equipped with the support column that the level set up, the support column is fixed on hoist mechanism's mounting flange, the top of ratchet is equipped with the pawl, the centre and the support column rotation of pawl are connected, the right-hand member of pawl is fixed with the connecting rod, be fixed with electromagnetic traction ware on the mounting flange on ratchet right side, the last pull rod that is equipped with of electromagnetic traction ware, and the upper end of pull rod is articulated with the connecting rod, be fixed with the spacing post on the mounting flange of pawl left end below, be equipped with spacing arch on the pawl of spacing post top, the pawl right-hand member is equipped with the joint portion corresponding with the ratchet. The utility model has simple structure and convenient disassembly, assembly and maintenance.

Description

Safety brake device for lifting mechanism

Technical Field

The utility model belongs to the technical design field of hoisting equipment, and particularly relates to a safety braking device for a lifting mechanism.

Background

The lifting mechanism is an auxiliary device for a crane to lift and lower an object, and is widely used in the field of hoisting machinery; the existing crane lifting mechanism is found in use, and can not timely perform emergency braking on a lifting winding drum in the process of lifting a heavy object, namely, when an emergency situation occurs, the existing braking device usually brakes through the friction force of a braking disc, the braking effect of the braking mode is poor, the winding drum can rotate for a certain time after the brake is started due to inertia, and the winding drum can not stop rotating immediately due to the fact that the winding drum cannot stop rotating, so that accidents occur.

SUMMERY OF THE UTILITY MODEL

The utility model provides a safety braking device for a lifting mechanism, aiming at solving the technical problem of poor braking effect of the existing lifting mechanism, and the safety braking device comprises a round ratchet wheel, wherein a plurality of ratchet wheel bulges are uniformly arranged on the outer wheel edge of the ratchet wheel at intervals, an assembly hole is formed in the middle of the ratchet wheel, the ratchet wheel is fixedly connected with a rotating shaft of the lifting mechanism through the assembly hole, a horizontally arranged support column is fixed on a fixing flange above the ratchet wheel, a pawl is arranged above the ratchet wheel, the middle of the pawl is rotatably connected with the support column, a connecting rod is fixed at the right end of the pawl, an electromagnetic tractor is fixed on a fixing flange on the right side of the ratchet wheel, a pull rod is assembled on the electromagnetic tractor, the upper end of the pull rod is hinged with the connecting rod, and under the traction of the electromagnetic tractor, the pawl is clamped with the ratchet wheel through the pull rod, and the rotating shaft is stopped. A limiting column is fixed on a fixing flange below the left end of the pawl, a limiting bulge is arranged on the pawl above the limiting column, the limiting column plays a limiting role, a clamping portion corresponding to the ratchet wheel is arranged at the right end of the pawl, and the clamping portion is clamped with the ratchet wheel bulge on the ratchet wheel to stop the lifting of the winding drum rapidly.

Preferably, the right end of the connecting rod is provided with a strip-shaped hole, and the upper end of the pull rod is hinged in the strip-shaped hole; an L-shaped tractor support is arranged between the electromagnetic tractor and the fixed flange, one end of the tractor support is detachably and fixedly connected with the fixed flange, and the upper end of the tractor support is detachably and fixedly connected with the electromagnetic tractor.

Preferably, a friction plate is arranged between the ratchet wheel and the fixed flange, and a backstop tightening ring is assembled on the rotating shaft on the right side of the ratchet wheel.

The scheme has the following advantages:

the braking device is arranged, the rotating shaft can be stopped quickly by the aid of the matching of the ratchet wheel and the pawl, and compared with a friction brake mode, the lifting drum is stopped more quickly, and the braking effect is better; the friction plate arranged between the ratchet wheel and the fixed flange can prevent the contact friction between the ratchet wheel and the fixed flange, so that the abrasion of the ratchet wheel is reduced; the setting of stopping tight ring can play the effect of blockking to the ratchet, reduces the ratchet and moves on the axis of rotation.

Drawings

FIG. 1 is a schematic front view of the present invention;

FIG. 2 is a left side view of the present invention;

FIG. 3 is a schematic structural diagram of a planetary reducer;

FIG. 4 is a schematic view of the ratchet and pawl configuration;

FIG. 5 is a schematic view of the ratchet structure;

fig. 6 is a schematic view of the pawl structure.

Reference numerals: 1. a support plate; 2. a limiting device; 3. a bearing; 4. a planetary reducer; 5. a braking device; 6. a hoisting motor; 11. fixing the rod; 12. installing a base; 13. lifting the winding drum; 21. a stopper; 22. a stopper bracket; 23. a connecting shaft; 41. a connecting plate; 42. a fixed flange; 43. a planet carrier; 44. a rotating shaft; 441. a backstop tightening ring; 45. a sun gear; 46. a planet wheel; 461. a pin shaft; 462. a gasket; 47. an output ring gear; 51. a ratchet wheel; 511. a friction plate; 52. a support pillar; 53. a pawl; 531. a limiting bulge; 532. a clamping part; 54. a limiting column; 55. a connecting rod; 551. a strip-shaped hole; 56. an electromagnetic retractor; 561. a retractor holder; 57. a pull rod.

Detailed Description

As shown in fig. 1-6, a safety brake device for hoisting mechanism, including two vertical backup pads 1 that just parallel interval set up, backup pad 1 plays the fixed effect of support, be equipped with a plurality of parallel arrangement's dead lever 11 between two backup pads 1, the tip of each dead lever 11 all can dismantle fixed connection rather than the backup pad 1 that corresponds, the lower extreme of backup pad 1 can be dismantled and be fixed with installation base 12, backup pad 1 constitutes the frame body with dead lever 11, be equipped with the play to rise reel 13 that the level set up between two backup pads 1, the both ends of playing to rise reel 13 all through pivot rotatable coupling in backup pad 1. Play to rise reel 13's left side and be equipped with stop device 2, stop device 2 includes the stopper support 22 fixed with left backup pad 1, be fixed with stopper 21 on the stopper support 22, be equipped with the connecting axle 23 that the level set up through bearing 3 on the left backup pad 1, the right-hand member of connecting axle 23 extend to in the backup pad 1 and with play to rise reel 13 coaxial line fixed connection, backup pad 1 is extended to the left end of connecting axle 23, and the left end and the stopper 21 assembly of connecting axle 23, stopper 21 switch-on. The right-hand member that rises reel 13 from left to right is equipped with planetary reducer 4 in proper order, arresting gear 5 and play to rise motor 6, play to rise motor 6 level and fix in backup pad 1 and the power output shaft who rises motor 6 extends to backup pad 1, the power output shaft who rises motor 6 passes through the shaft coupling with planetary reducer 4's power input shaft and can dismantle fixed connection, planetary reducer 4's power take off end and play to rise reel 13 can dismantle fixed connection through connecting plate 41, planetary reducer 4's right side is equipped with mounting flange 42, mounting flange 42 passes through fixing bolt and can dismantle fixed connection with backup pad 1, arresting gear 5 sets up between mounting flange 42 and backup pad 1. The planetary reducer 4 comprises a planet carrier 43, the planet carrier 43 plays a role of fixed support, a rotating shaft 44 horizontally arranged is assembled in the planet carrier 43 through a bearing 3, a sun gear 45 is fixed at the left end of the rotating shaft 44, a plurality of planet gears 46 are assembled on the planet carrier 43 surrounding the sun gear 45 through a pin shaft 461 and the bearing 3, each planet gear 46 is meshed with the sun gear 45, an output gear ring 47 is rotatably assembled at the left end of the planet carrier 43 through the bearing 3, the left end of the output gear ring 47 is detachably and fixedly connected with the lifting winding drum 13, the right end of the output gear ring 47 is meshed with the planet gear 46, the right end of the rotating shaft 44 extends out of the output gear ring 47, when the rotating shaft 44 rotates, the rotating shaft 44 drives the sun gear 45 to rotate, the sun gear 45 drives each planetary gear 46 to synchronously rotate, and each planetary gear 46 drives the output gear ring 47 to rotate, so that the high-speed rotation of the rotating shaft 44 is converted into the slow rotation of the output gear ring 47.

Arresting gear includes ratchet 51, and ratchet 51's foreign steamer sets up a plurality of ratchet arch along even interval, the pilot hole has been seted up in the centre of ratchet 51, and ratchet 51 passes through the right-hand member fixed connection of pilot hole and axis of rotation 44, is fixed with the support column 52 of horizontal arrangement on the mounting flange 42 of ratchet 51 top, and ratchet 51's top is equipped with pawl 53, and pawl 53's centre and support column 52 rotate to be connected, and pawl 53's right-hand member is fixed with connecting rod 55, is fixed with electromagnetic retractor 56 on the mounting flange 42 on ratchet 51 right side, is equipped with pull rod 57 on the electromagnetic retractor 56, and pull rod 57's upper end is articulated with connecting rod 55, and under electromagnetic retractor 56's traction, pull rod 57 stimulates pawl 53 and ratchet 51 joint, stops axis of rotation 44. A limiting column 54 is fixed on the fixing flange 42 below the left end of the pawl 53, a limiting bulge 531 is arranged on the pawl 53 above the limiting column 54, the limiting column 54 plays a limiting role, a clamping portion 532 corresponding to the ratchet wheel 51 is arranged at the right end of the pawl 53, the clamping portion 532 is clamped with the ratchet wheel bulge on the ratchet wheel 51, and the lifting of the winding drum 13 is stopped rapidly.

Preferably, the right end of the connecting rod 55 is provided with a strip-shaped hole 551, and the upper end of the pull rod 57 is hinged in the strip-shaped hole 551; an L-shaped retractor bracket 561 is arranged between the electromagnetic retractor 56 and the fixed flange 42, one end of the retractor bracket 561 is detachably and fixedly connected with the fixed flange 42, and the upper end of the retractor bracket 561 is detachably and fixedly connected with the electromagnetic retractor 56.

Preferably, a friction plate 511 is provided between the ratchet wheel 51 and the fixed flange 42, and a back-stop ring 441 is assembled on the rotating shaft 44 on the right side of the ratchet wheel 51.

Preferably, a gasket 462 is arranged between two sides of the planet wheel 46 and the planet carrier 43, and the gasket 462 is sleeved on the pin 461.

Preferably, the lifting motor 6 is a three-phase asynchronous motor, the lifting motor 6, the limiting device 2 and the electromagnetic retractor 56 are all powered on by cables, and the lifting motor 6, the limiting device 2 and the electromagnetic retractor 56 are all connected with the PLC controller by cables.

The use process comprises the following steps:

when the hoisting mechanism is used, the hoisting mechanism is fixed on a crane through the mounting base 12, the hoisting drum 13 is provided with a steel wire rope, a hoisting sling is detachably fixed on the steel wire rope below the hoisting drum 13, when a heavy object needs to be hoisted, the hoisting motor 6 is started through the PLC controller, the power output shaft of the hoisting motor 6 rotates, the rotating shaft 44 of the planetary speed reducer 4 is driven to rotate, and finally the hoisting drum 13 is driven to rotate through the deceleration of the sun gear 45, the planet gear 46 and the output gear ring 47, so that the hoisting drum 13 can reel in and out the steel wire rope, and the heavy object can be lifted or put down; when the heavy object is lifted to a certain height, the limiter 21 transmits a signal to the PLC controller, the PLC controller controls the lifting motor 6 to stop rotating, meanwhile, the PLC controller sends an instruction to the electromagnetic tractor 56, the electromagnetic tractor 56 pulls the pull rod 57 downwards, and the pull rod 57 pulls the pawl 53 to clamp the rotating ratchet wheel 51 downwards, so that the rotating shaft 44 is stopped rapidly. When the lifting sling needs to be lowered, the PLC starts the electromagnetic tractor 56, the electromagnetic tractor 56 pushes the pull rod 57, the pull rod 57 pushes the pawl 54 to rotate upwards, the pawl 53 is separated from the ratchet wheel 51, the lifting motor 6 is started, and the lifting sling falls under the driving of the lifting motor 6.

In the description of the present invention, it is to be understood that the terms "upper", "lower", "left", "right", "top", "bottom", "horizontal", "vertical", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are only for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention.

The above embodiments are illustrative of the present invention, and are not intended to limit the present invention, and any simple modifications of the present invention are within the scope of the present invention.

Claims (5)

1. A safety brake device for a lifting mechanism is characterized in that: including being the circular shape ratchet, the pilot hole has been seted up in the centre of ratchet, the ratchet passes through pilot hole and hoist mechanism's axis of rotation fixed connection, the ratchet top is equipped with the support column that the level set up, the support column is fixed on hoist mechanism's mounting flange, the top of ratchet is equipped with the pawl, the centre of pawl is rotated with the support column and is connected, the right-hand member of pawl is fixed with the connecting rod, be fixed with electromagnetic traction ware on the mounting flange on ratchet right side, be equipped with the pull rod on the electromagnetic traction ware, and the upper end of pull rod is articulated with the connecting rod.

2. A safety brake device for a hoist mechanism according to claim 1, characterized in that: a limiting column is fixed on the fixing flange below the left end of the pawl, a limiting bulge is arranged on the pawl above the limiting column, and a clamping portion corresponding to the ratchet wheel is arranged at the right end of the pawl.

3. A safety brake device for a hoist mechanism according to claim 2, characterized in that: the right-hand member of connecting rod has seted up the bar hole, and the upper end of pull rod articulates in the bar hole.

4. A safety brake device for a hoist mechanism according to claim 3, characterized in that: an L-shaped tractor support is arranged between the electromagnetic tractor and the fixed flange, one end of the tractor support is detachably and fixedly connected with the fixed flange, and the upper end of the tractor support is detachably and fixedly connected with the electromagnetic tractor.

5. A safety brake device for a hoist mechanism according to claim 4, characterized in that: a friction plate is arranged between the ratchet wheel and the fixed flange, and a backstop tightening ring is assembled on the rotating shaft on the right side of the ratchet wheel.

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