CN2214404Y - Hoisting mechanism capable of long distance draging or high lifting height - Google Patents

Abstract

The utility model relates to a hoisting mechanism capable of long-distance dragging or high-height lifting for lifts, elevators, cranes, hoists for water conservancy, and engineering machinery. The utility model is mainly composed of a motor, a speed reducer, a friction drum, a guiding wheel and a rope storage drum. Two one-way back stop devices and one torque limiter are arranged on the rope storage drum, so that the speed for multi-layer rope storage coiling can be consistent with the speed for friction coiling, and one end for rope storage has certain tension force. Compared with machines for multi-layer coiling, the utility model has the advantage that the dragging force and the speed can not be changed along with the changes of the number of coiling layers; the utility model also has protective function for the overload of friction drive. If the utility model is used on an elevator, a counterweight device can be omitted, and the cost can be reduced.

Description

Hoisting mechanism capable of long distance draging or high lifting height

The utility model is a kind of long distance traction of elevator, elevator, hoisting crane, water conservancy headstock gear and construction machinery and equipment or hoisting mechanism of big elevating height of being used for.

In the prior art, realize that the measure that long distance is drawn or the elevator of big elevating height adopts has several.The one, strengthen drum diameter or length, but this can increase power and mechanism; The 2nd, adopt multilaminate coiled tube, but along with the coiling number of plies changes, tractive force and speed also change thereupon, and extruding, friction that steel rope is subjected to are big, fragile.No matter be single laminate roll around or multilaminate coiled mechanism; do not have the overload protection effect: block or super lift heavy situation when traction runs into; can not resemble all that steel rope can skid the friction-driven on reel, not prevent to burn out motor, the accident of damaging parts or breaking rope takes place.The elevator friction-driven: an end of the rope car that plays, the other end is suspending counterweight in midair, drives rope sheave in the middle of driving by towing machine and makes its rise and fall.But counterweight is heavier than car, makes elevator increase complexity.

Aim of the present utility model is the problem at above-mentioned existence, a kind of hoisting mechanism of growing distance traction or big elevating height is provided, adopt friction-driven, tractive force and speed can not changed with the variation of drawing length, hoisting force and speed can not change with the variation of hoisting depth yet; And without counterweight, but the storage end has certain tightening force, has played the effect of balance friction, and it is much smaller that this power is just compared gravity.

The utility model mainly is made up of motor, retarder, friction drum, track adjusting wheel, storage rope reel.Consistent for multilayer storage rope is reeled with the friction convoluting speed, and store up end and possess certain tightening force, on the storage rope reel, two unidirectional holdbacks and a torque limiter are housed.When the friction-driven steel rope is made drawing or is promoted, the storage rope reel is just received rope thereupon, output shaft by the band star-wheel, the interior holdback that square axle sleeve and roller are formed drives reel and does the inhour rotation, it receives the tightening force and the speed of rope, by the steel ball of adorning in the uniform hole of 8 five equilibriums on the carrier ring on the end that is packed in it, the torque limiter that spring is formed is controlled: if tightening force has exceeded certain scope, receive rope speed greater than drawing or hoisting speed, between storage rope reel and the square axle sleeve just slip sliding phenomenon in the same way can appear, steel ball pressuring spring on square is pushed in the hole, steel ball on the square angle is then by in the spring introduction hole, so alternately produce resisting moment by turns, no matter but how it rotate, ultimate torque remains constant.On the contrary, when the storage rope reel is put rope along with friction-driven, the output shaft of band star-wheel is only done cw idle running, and the square axle sleeve of band star-wheel be packed in the outer holdback that lasso on the reducer shell and roller form and prevent square axle sleeve clockwise, the storage rope reel of this moment is driven to restrict to affect and clockwise rotates, because of the effect of torque limiter,, still possess enough tightening forces at the storage end even put rope.

The utility model is compared with multilaminate coiled mechanism, and under the identical situation of output torque, the winding diameter of friction drum is little than the outermost winding diameter of multilaminate coiled tube, and torsion compares big.Though the storage rope reel also is multilaminate coiled, tube is gone up tightening force than traction or the little e of hoisting force ^{μ α}Doubly (in the formula, the truth of a matter of e-Napier's logarithm, the friction coefficient of μ-rope and tube, α-coiling cornerite) is to extruding, the frictionally damage of rope, also little comparatively speaking.Tractive force and speed can not become with the variation of the coiling number of plies, also have an overload protection effect of friction-driven.The utility model is used on the elevator, and alternative towing machine can save counterweight, and tunnel dimension can change little, and equipment and construction cost all can reduce.

Description of drawings:

Fig. 1 is the utility model structural representation.

Fig. 2 twines scheme drawing for the utility model steel rope.

Fig. 3 is the utility model storage rope reel cross-sectional end view.

Embodiment:

As shown in Figure 1 and Figure 2, the utility model is a power with motor (1), drive on the output shaft of retarder (3) one sides by coupling/brake device (2) and two friction drums (4) of equipping are done in the same way with the speed rotation, and on opposite side output shaft (9), adorning neither in the same way the storage rope reels (7) of different speed again, and by track adjusting wheel (5) steel rope (6) is incorporated into from the friction side revolution and stores up end and get on.Two friction drums (4) have multiple-grooved annular grooving.The light face should be made in the surface of storage rope reel (7), and its monovolume is littler than the friction winding diameter around diameter, but revolution ratio again hurry up, for this reason, the linear velocity that storage is restricted should be equal to or greater than the linear velocity of friction.

As shown in Figure 3, in storage rope reel (7), two unidirectional holdbacks are housed: holdback in the square axle sleeve (8) that the band star-wheel promptly is housed is formed with the output shaft (9) of band star-wheel and roller (11), and again be packed in retarder (3) housing on lasso (14) and the different outer holdback of roller (11) composition check direction.Carrier ring (10) is packed in the end of storage rope reel (7), encircles in the uniform hole of upper edge circumference 8 five equilibriums and is adorning steel ball (12) and spring (13), forms torque limiter.The limit value of moment of torsion realizes by adjusting spring (13), can calculate by following formula:

$M=\frac{{\mathrm{SD}}_{\max }}{2}=\frac{{\mathrm{PD}}_{\max }}{2e^{\mathrm{\μd}}}$

In the formula, S-storage rope go up must tool tightening force, the maximum gauge of Dmax-storage rope coiling, P-dynamic load rating.

From calculating formula as can be seen, moment of torsion M is certain, and the diameter of reeling along with multilayer storage rope reduces, and tightening force can increase, but the rangeability of this power is little, and is on the contrary favourable to friction-driven.

Claims (3)

1, a kind of long distance traction of elevator, elevator, hoisting crane, water conservancy headstock gear and construction machinery and equipment or hoisting mechanism of big elevating height of being used for, mainly form by motor, retarder, friction drum, track adjusting wheel, storage rope reel, it is characterized in that on a side output shaft of retarder (3) and equipping two friction drums (4), and on opposite side output shaft (9), adorning storage rope reel (7), by track adjusting wheel (5) steel rope (6) is incorporated into the storage end from the friction side revolution and gets on.

2, mechanism according to claim 1, it is characterized in that in storage rope reel (7), two unidirectional holdbacks being housed: holdback in the square axle sleeve (8) that the band star-wheel promptly is housed is formed with the output shaft (9) of band star-wheel and roller (11), and again be packed in retarder (3) housing on lasso (14) and the different outer holdback of roller (11) composition check direction.

3, mechanism according to claim 1 is characterized in that carrier ring (10) is packed in the end of storage rope reel (7), encircles in the uniform hole of upper edge circumference 8 five equilibriums and is adorning steel ball (12) and spring (13), forms torque limiter.

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