CN210313291U - Auxiliary brake device for electric hoist - Google Patents

Abstract

The utility model provides an electric block uses auxiliary brake device belongs to mechanical technical field. It has solved the not high scheduling problem of current electric block safety in utilization. This auxiliary brake device for electric block includes box and output shaft, the installation cavity has been seted up to the outer terminal surface of box, the output shaft is worn out the installation cavity setting, the outer terminal surface of box has linked firmly the bottom, the cover is equipped with a brake section of thick bamboo in the bottom, the inner of a brake section of thick bamboo has the turn-ups, the outer end of a brake section of thick bamboo has linked firmly the apron, be equipped with the elastic component between bottom and the apron, the interior terminal surface of bottom has the bulge, the turn-ups has the stop part, the elastic component provides elasticity and makes the inclined plane of stop part laminate in the inclined plane setting of bulge, the output shaft has linked firmly the braking piece that is located a brake section of thick bamboo, when output. The utility model has the advantages of compact structure, rapid reaction, high safety in use and the like.

Description

Auxiliary brake device for electric hoist

Technical Field

The utility model belongs to the technical field of machinery, a brake equipment is related to, in particular to electric block uses auxiliary brake equipment.

Background

The electric hoist is a special hoisting device, is arranged on a crown block and a gantry crane, has the characteristics of small volume, light dead weight, simple operation, convenient use and the like, and is applied to places such as industrial and mining enterprises, warehouses, docks and the like. When using electric block to hoist the goods, the phenomenon of outage suddenly can take place, and under the outage state, the goods that hang can descend rapidly, and the brake equipment of electric block has become invalid in the other situation, also can cause the goods that hang to descend rapidly, threatens below operating personnel's personal safety, also causes the property damage.

In view of the above problems, various brake devices for electric hoists have been designed, and for example, chinese patent literature discloses a brake device for an electric hoist [ application No.: 201729877400. X; authorization notice number: CN206985590U ], which comprises fixed plates, a first connecting rod, a left-right moving mechanism, a clamping mechanism, an installation barrel, a winding drum, a rope guiding nut and a fourth supporting rod, wherein the two fixed plates are fixedly connected with the outer top of the installation barrel, the first connecting rod is fixedly connected with the front part of the fixed plates along the horizontal direction, the clamping mechanism is fixedly connected with the end part of the first connecting rod, the fourth supporting rod is fixedly connected with the outer surface of the installation barrel, the left-right moving mechanism is fixedly connected with the top part of the fourth supporting rod, the winding drum is installed in the installation barrel, the rope guiding nut is in threaded connection with the winding drum, the clamping mechanism comprises an arc-shaped rod, an inserting rod, a third supporting rod, a hydraulic cylinder, an L-shaped supporting rod and a brake wheel, the L-shaped supporting rod is fixedly connected with the end part of the first connecting rod, the hydraulic cylinder is fixedly connected, the inserted bar is fixedly connected with the rear side surface of the third supporting rod, the brake wheel is fixedly connected with the winding drum, and a slot matched with the inserted bar is formed in the brake wheel.

In foretell electric block's brake equipment use, when appearing outage suddenly or self braking system destroys, it exerts the pulling force to the arc pole through removing the moving mechanism about for the arc pole can with installation barrel outward appearance in close contact with, thereby strengthen the friction, and then make chucking mechanism can further the chucking reel, thereby avoid the goods whereabouts of hoisting, improved the safety in utilization, but its structure is complicated, middle transmission process is many, the reaction is sensitive inadequately, the device is bulky, difficult installation.

Disclosure of Invention

The utility model aims at providing a compact structure, react rapid auxiliary brake device for electric block to the above-mentioned problem that exists among the prior art.

The purpose of the utility model can be realized by the following technical proposal: the utility model provides an auxiliary brake device for electric block, includes the box and wears to locate the output shaft in the box, its characterized in that, the outer terminal surface of box seted up the installation cavity, the output shaft wear out the installation cavity setting, the outer terminal surface of box link firmly with the installation cavity closing cap and be discoid bottom, the bottom in the cover be equipped with the brake cylinder that is the tube-shape, the inner of brake cylinder have the turn-ups of radially turning over a book, the outer end of brake cylinder has linked firmly the apron, bottom and apron between be equipped with the elastic component, the inner terminal surface of bottom have a plurality of circumference equipartitions and have the bulge of inclined plane, the turn-ups have quantity and the bulge unanimous and have the block portion of inclined plane, the elastic component provide elasticity and make the inclined plane of block portion laminate in the inclined plane setting of bulge, the output shaft link firmly the stopper that is arranged in the brake cylinder, the brake member is deformed to abut against the brake drum when the rotational speed of the output shaft exceeds a safe value.

In the auxiliary brake device for the electric hoist, the inner wall of the mounting cavity is provided with a plurality of axially extending limiting grooves, and the edge of the flanging is provided with limiting blocks positioned in the limiting grooves.

In foretell electric block is with supplementary brake device, the braking piece include two stationary blades that fold and press, the stationary blade have the splined hole, the output shaft spline that cooperates in the splined hole has, the stationary blade lateral part is equipped with symmetry and is curved braking piece, the bottom of two braking pieces all is located between two stationary blades and articulates, the top of two braking pieces is connected through the extension spring, the extension spring provide elasticity and make the top of two braking pieces have the trend of being close to each other all the time.

In the auxiliary brake device for the electric hoist, the elastic part is a torsion spring, one end of the torsion spring is fixedly connected to the bottom cover, and the other end of the torsion spring is fixedly connected to the cover plate. The torsional spring provides elasticity and makes the inclined plane laminating of block portion in the inclined plane setting of bulge, and the torsional spring provides elasticity moreover and makes a brake section of thick bamboo reset.

In the auxiliary brake device for the electric hoist, the bottom cover is provided with a plurality of convex blocks which are circumferentially and uniformly distributed and abut against the outer end face of the box body. Therefore, the effective contact area between the bottom cover and the outer end face of the box body is large, and the bottom cover and the box body are good in connection firmness.

In the auxiliary brake device for the electric hoist, the bottom cover is provided with the cylindrical positioning seat which axially protrudes, the torsion spring is sleeved outside the positioning seat, and the outer wall of the brake cylinder is in contact with the inner wall of the positioning seat. The positioning seat provides the support for the torsional spring for torsional spring job stabilization, the positioning seat plays limiting displacement moreover, avoids a brake section of thick bamboo to rock and influences the brake effect.

In foretell electric block is with supplementary brake device, the output shaft link firmly the gyro wheel that is located between installation cavity bottom and the brake cylinder, the outer lane contact of gyro wheel set up in the installation cavity inner wall, be equipped with between gyro wheel and the installation cavity bottom and all overlap dish spring and the gasket on the output shaft, the dish spring provide elasticity and make the gasket keep conflicting in the trend of gyro wheel. The gyro wheel plays the supporting role, and output shaft rotation stability, transmission moment are effectual, and dish spring and gasket are avoided gyro wheel contact installation cavity bottom and are abraded, have guaranteed life.

Compared with the prior art, the auxiliary brake device for the electric hoist has the advantages of compact structure, small volume, convenience in installation, good working stability, less intermediate transfer process, rapid reaction, timeliness in braking and improvement of use safety.

Drawings

Fig. 1 is a schematic sectional view of the auxiliary brake device for an electric hoist.

Fig. 2 is a schematic structural view of the auxiliary brake device for the electric block after the installation of the installation cavity and the brake cylinder.

Fig. 3 is a schematic structural view of a braking member in the auxiliary braking device for the electric block.

Fig. 4 is a sectional view showing a hinge joint between a fixed plate and a brake pad in the auxiliary brake apparatus for the electric block.

Fig. 5 is a perspective view of a bottom cover of the auxiliary brake device for the electric block.

Fig. 6 is a perspective view of a brake drum in the auxiliary brake apparatus for an electric block.

In the figure, 1, a box body; 2. an output shaft; 3. a mounting cavity; 31. a limiting groove; 4. a bottom cover; 41. a projection; 42. a bump; 43. positioning seats; 5. a brake drum; 51. flanging; 52. a blocking portion; 53. a limiting block; 6. a cover plate; 7. a stopper; 71. a fixing sheet; 72. a splined bore; 73. a brake pad; 74. a tension spring; 8. a torsion spring; 9. a roller; 10. a disc spring; 11. and (7) a gasket.

Detailed Description

The following are specific embodiments of the present invention and the accompanying drawings are used to further describe the technical solution of the present invention, but the present invention is not limited to these embodiments.

As shown in fig. 1, 5 and 6, the auxiliary brake device for the electric hoist comprises a box body 1 and an output shaft 2 penetrating through the box body 1, wherein an installation cavity 3 is arranged on the outer end face of the box body 1, the output shaft 2 penetrates through the installation cavity 3, the outer end face of the box body 1 is fixedly connected with a disc-shaped bottom cover 4 which is used for sealing the installation cavity 3 through screws, a cylindrical brake cylinder 5 is sleeved in the bottom cover 4, the inner end of the brake cylinder 5 is provided with a flange 51 which is turned over in the radial direction, the outer end of the brake cylinder 5 is fixedly connected with a cover plate 6, an elastic member is arranged between the bottom cover 4 and the cover plate 6, the inner end face of the bottom cover 4 is provided with three projections 41 which are uniformly distributed in the circumferential direction and are provided with inclined planes, the flange 51 is provided with blocking parts 52 which are consistent with the projections 41 and are provided with the inclined planes, the elastic member provides elasticity so that the inclined planes of the blocking parts 52 are, when the rotation speed of the output shaft 2 exceeds a safety value, the brake member 7 is deformed to abut against the brake drum 5. In this embodiment, the elastic member is a torsion spring 8, one end of the torsion spring 8 is fixedly connected to the bottom cover 4, and the other end of the torsion spring 8 is fixedly connected to the cover plate 6.

This electric block is with auxiliary brake device's compact structure, small, the installation of being convenient for, its theory of operation as follows: the braking part 7 rotates along with the output shaft 2 at ordinary times, the braking part 7 does not abut against the brake cylinder 5, and the brake cylinder 5 cannot rotate; when sudden power failure or self brake system damage occurs, the lifted goods fall rapidly, so that the output shaft 2 rotates rapidly, the rotating speed of the output shaft 2 exceeds a safety value (generally 1500 r/min), centrifugal force enables the brake part 7 to deform to abut against the brake cylinder 5 and drive the brake cylinder 5 to rotate, the blocking part 52 on the flanging 51 rotates, and under the elastic action of the spring, the inclined surface of the blocking part 52 always abuts against the inclined surface of the protruding part 41, the blocking part 52 is clamped on the protruding part 41, so that the brake cylinder 5, the brake part 7 and the output shaft 2 are prevented from rotating, a brake effect is achieved, the middle transmission process of the brake is few, and the reaction is rapid.

In further detail, as shown in fig. 1 and fig. 2, the inner wall of the mounting cavity 3 has three axially extending limiting grooves 31, and the edge of the flange 51 has a limiting block 53 located in each limiting groove 31. After stop part 52 cooperation bulge 41 played the braking action, when the goods of hoisting was overweight still keeps higher falling speed, turn-ups 51 rotated and to be made stopper 53 lean on in spacing groove 31 opposite side from spacing groove 31 one side, thereby play the braking action by force, avoid turn-ups 51 to continue to rotate, even make brake cylinder 5 stall, output shaft 2 contradicts in brake cylinder 5 through braking piece 7, output shaft 2 obtains the braking like this, the deceleration, avoid the goods to fall rapidly, the security has further been improved.

As shown in fig. 3 and 4, the braking member 7 includes two laminated fixing plates 71, the fixing plates 71 have spline holes 72, the output shaft 2 has splines fitted in the spline holes 72, the fixing plates 71 are provided at their sides with symmetrical and arc-shaped braking plates 73, the bottom ends of the two braking plates 73 are both located between the two fixing plates 71 and hinged, the top ends of the two braking plates 73 are connected by a tension spring 74, and the tension spring 74 provides an elastic force so that the top ends of the two braking plates 73 always have a tendency to approach each other. The fixed plate 71 is circumferentially and fixedly connected with the output shaft 2 through a spline, torque transmission is stable, the rotating speed of the output shaft 2 exceeds a safety value (generally 1500 r/min), centrifugal force overcomes the elastic force of the tension spring 74 to enable the two brake plates 73 to be outwards supported, the brake plates 73 are abutted to the inner wall of the brake drum 5 to play a braking role, and after the rotating speed of the output shaft 2 is reduced, the elastic force of the tension spring 74 overcomes the centrifugal force to enable the top ends of the two brake plates 73 to be drawn close again.

For firm connection, the bottom cover 4 is provided with six lugs 42 which are evenly distributed in the circumferential direction and abut against the outer end face of the box body 1; for job stabilization, bottom 4 has the axial protrusion and is the positioning seat 43 of tube-shape, 8 covers of torsional spring in the positioning seat 43 outsides, the outer wall contact in positioning seat 43 inner walls of brake cylinder 5, output shaft 2 links firmly gyro wheel 9 that is located between 3 bottoms of installation cavity and the brake cylinder 5, the outer lane contact of gyro wheel 9 is in the setting of 3 inner walls of installation cavity, be equipped with between 3 bottoms of gyro wheel 9 and installation cavity and all overlap dish spring 10 and the gasket 11 on output shaft 2, dish spring 10 provides elasticity and makes gasket 11 keep conflicting in the trend of gyro wheel 9.

Those not described in detail in this specification are within the skill of the art. The specific embodiments described herein are merely illustrative of the spirit of the invention. Various modifications, additions and substitutions for the specific embodiments described herein may be made by those skilled in the art without departing from the spirit of the invention or exceeding the scope of the invention as defined in the accompanying claims.

Claims (7)

1. The utility model provides an auxiliary brake device for electric block, includes box (1) and wears to locate output shaft (2) in box (1), its characterized in that, the outer terminal surface of box (1) seted up installation cavity (3), output shaft (2) wear out installation cavity (3) and set up, the outer terminal surface of box (1) link firmly with installation cavity (3) closing cap and be discoid bottom (4), bottom (4) in the cover be equipped with brake cylinder (5) that are the tube-shape, the inner of brake cylinder (5) have turn-ups (51) of radially turning over a book, the outer end of brake cylinder (5) has linked firmly apron (6), bottom (4) and apron (6) between be equipped with the elastic component, the inner terminal surface of bottom (4) have a plurality of circumference equipartitions and have bulge (41) on inclined plane, turn-ups (51) have the quantity and bulge (41) unanimously and have the block portion (52) on inclined plane, the elastic piece provide elasticity and make the inclined plane of blocking part (52) laminate in the inclined plane setting of bulge (41), output shaft (2) link firmly and be located brake block (7) in brake cylinder (5), when output shaft (2) rotational speed surpassed the safe value brake block (7) warp in order to contradict brake cylinder (5).

2. The auxiliary brake device for the electric hoist according to claim 1, wherein the inner wall of the mounting cavity (3) is provided with a plurality of axially extending limiting grooves (31), and the edge of the flange (51) is provided with a limiting block (53) positioned in each limiting groove (31).

3. The auxiliary brake device for the electric hoist as claimed in claim 1 or 2, wherein the brake member (7) comprises two laminated fixing plates (71), the fixing plates (71) have spline holes (72), the output shaft (2) has splines fitted in the spline holes (72), the fixing plates (71) have symmetrical and arc-shaped brake plates (73) at the side portions thereof, the bottom ends of the two brake plates (73) are both located between the two fixing plates (71) and hinged thereto, the top ends of the two brake plates (73) are connected by a tension spring (74), and the tension spring (74) provides an elastic force to make the top ends of the two brake plates (73) always have a tendency to approach each other.

4. The auxiliary brake device for the electric hoist according to claim 3, wherein the elastic member is a torsion spring (8), one end of the torsion spring (8) is fixedly connected to the bottom cover (4), and the other end of the torsion spring (8) is fixedly connected to the cover plate (6).

5. The auxiliary brake device for the electric hoist according to claim 4, wherein the bottom cover (4) has a plurality of protrusions (42) which are circumferentially and evenly distributed and abut against the outer end surface of the case (1).

6. The auxiliary brake device for the electric hoist as claimed in claim 5, wherein the bottom cover (4) has a cylindrical positioning seat (43) protruding axially, the torsion spring (8) is sleeved outside the positioning seat (43), and the outer wall of the brake cylinder (5) contacts with the inner wall of the positioning seat (43).

7. The auxiliary brake device for the electric hoist according to claim 6, wherein the output shaft (2) is fixedly connected with a roller (9) which is positioned between the bottom of the mounting cavity (3) and the brake cylinder (5), the outer ring of the roller (9) is in contact with the inner wall of the mounting cavity (3), a disc spring (10) and a gasket (11) which are sleeved on the output shaft (2) are arranged between the roller (9) and the bottom of the mounting cavity (3), and the disc spring (10) provides elastic force to enable the gasket (11) to keep the tendency of abutting against the roller (9).

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