CN2114644U

CN2114644U - Driving system for small cart lift unlodding of grab hoist

Info

Publication number: CN2114644U
Application number: CN 91227341
Authority: CN
Inventors: 赵恒业
Original assignee: Individual
Current assignee: Individual
Priority date: 1991-10-31
Filing date: 1991-10-31
Publication date: 1992-09-02

Abstract

The utility model provides a side rope roller and a middle rope roller which only adopt a motor and a retarder to replace the existing two motors and two retarders to drive a grab bucket crane crab to rise and fall to grasp unloading. The driving system of the utility model comprises a driving gear or a belt pulley which drives from the side rope roller to the middle rope roller, a first clutch and a second clutch which are convenient for the side rope roller and the middle rope roller to cooperate to work, and a stopper which is convenient for a grasping fixture to unload or security protection. Therefore, a motor and a retarder can be omitted, the volume and the weight of the crane crab can be reduced, crane men's operation is simplified, labor productivity is saved, the integral cost of the crane crab is reduced, and power consumption is saved.

Description

Driving system for small cart lift unlodding of grab hoist

The utility model relates to the driving system that shedding mechanism is grasped in a kind of grab crane dolly lifting.

The transmission of existing grab crane dolly lifting grasping mechanism is by drg and the drop-gear box limit rope drum and the middle rope drum that respectively drive be used for grab bucket limit rope and rope of two motors by separately.Wherein rope directly is fixed on the grab bucket frame with wire clips, and the Bian Shengxian that draws from the limit rope drum is around to the fixed pulley that is fixed on the grab bucket frame, then around on the movable pulley of grab bucket folding hinge place and the frame support of grab bucket end joint connection, and with this by fixed pulley--the pulley multiplying power of movable pulley is around drawing returning tightly on the rope drum of limit with end after the suitable number of turns.Because the system of rope drum always is in passive mode of operation in the above-mentioned driving, the rope drum, all the other were just followed the limit rope and are receiving rope, putting rope during drg was braked during except that discharging.And the motor and the identical retarder of transmitting ratio of the same capacity of two covers are adopted in design during dolly usually, and purpose is to want to allow two cylinder synchronized operations, can work independently again.In fact, middle rope be as long as very little power just can play corresponding effect, and therefore, drive systems such as motor that the employing of middle rope is above-mentioned and retarder make the cumbersome cost height of mechanism, volume big, and consumption of power is big, the expense height, and be unfavorable for craneman's operation.

At above-mentioned defective, the purpose of this utility model provides the driving system that shedding mechanism is grasped in a kind of grab crane dolly lifting of adopting a motor to come difference drive controlling limit rope drum and middle rope drum.

For this reason, middle rope drive of the present utility model has typically been adopted gear transmission or belt-driving by the mechanically synchronously transmission of limit rope drum at this in the utility model.

Simultaneously, for the folding and unfolding cooperating of rope in making with the limit rope, to realize that dolly promotes, descend, the utility model is between limit rope drum and middle rope drum, the first clutch of one electromagnet-friction is installed at the spindle nose of middle rope drum, the adhesive when receiving the i.e. grab bucket rising of rope of this power-transfer clutch, receive rope with rope drum in the synchrodrive, and at the other end of the spindle nose of middle rope drum, the second clutch that is in the electromagnet-friction of interlocking state with first clutch is installed, this second friction clutch is fixedly mounted on the car rack, when putting rope, when promptly grab bucket descends, first clutch unclamps and the second clutch adhesive, like this, can be by selecting second clutch, friction drag when making its adhesive between its friction lining is less than grab bucket deadweight decline power, therefore the friction lining of its electromagnetism adhesive is in slipping state during the second clutch adhesive, but because the friction of its adhesive gives the friction drag that middle rope drum descends and rolls, prevented the inertia excess revolutions rolling when middle rope drum is put rope, can guarantee again to grab bucket normally descends, and the steel rope in making on the rope drum always is in the state of tightening, and grab bucket is opened.When grab bucket was parked in a certain position, the descended effect of power-transfer clutch of middle rope drum stopped to put rope, and it is slack to grab bucket.

For the ease of discharging,, the mechanical type stopper of a centering rope drum stop when discharging or safety guard-safeguard is installed also on the middle rope drum maybe when outage or centering rope drum stop when breaking down.This stopper can be by the wedge inclined-plane in the chute to the locked and stop or also can be by the ratchet device centering rope drum stop of an electromagnetic clutch by friction angle of the axis of cylinder or middle rope drum.

Therefore; the driving system of shedding mechanism is grasped in grab crane dolly lifting of the present utility model; motor wherein is by the limit rope drum of retarder transmission folding and unfolding rope; and feature is: in this system; the limit rope drum and the rope drum that are used for the folding and unfolding rope only adopt a motor-driven; this motor is transferred to the limit rope drum that is used for limit rope folding and unfolding by a drop-gear box; and the middle rope drum of the folding and unfolding that is used for restricting is can be with above-mentioned limit rope drum by rope drum shaft mechanical ground, limit synchrodrive by above-mentioned limit rope drum; between the transmission of limit rope drum and middle rope drum; the first clutch of one electromagnet-friction is installed at the spindle nose of middle rope drum; the adhesive when receiving the i.e. grab bucket rising of rope of this power-transfer clutch; receive rope with rope drum in the synchrodrive; and at the other end of the spindle nose of middle rope drum; be equipped with first clutch is in interlocking state and be used to put the second clutch that rope is promptly grabbed bucket and descended; when being used for grab bucket decline, this second clutch give rope drum one friction drag with electromagnet-friction; inertia when rope drum is put rope in preventing rolls; an end of this second clutch and trolley frame fixedly mount for this reason, and the mechanical type stopper of a centering rope drum stop when discharging and safety guard-safeguard also is installed on the middle rope drum.

Driving system of the present utility model adopts two cylinders of an electric machine control to substitute two motor transmission systems of employing of prior art, so just can save a motor and a retarder, has made volume-diminished, weight saving.Craneman's operation also can be simplified greatly.The past operative employee be the operation two handles (two motors), cart, carriage walking are inactive, if a motor handle is also with regard to available one so, the another hand can be operated cart or dolly.The haul time has been saved.Labor efficiency improves widely.Save a motor, a retarder, the dolly overall cost has reduced, and it is conspicuous especially to economize on electricity.

Below with accompanying drawing the utility model is further described, wherein:

Fig. 1 is the driving system that shedding mechanism is grasped in the grab crane dolly lifting of prior art;

Fig. 2 is limit rope and middle rope and grab bucket bonded assembly scheme drawing;

Fig. 3 is the driving system that shedding mechanism is grasped in grab crane dolly lifting of the present utility model;

Fig. 4 is the scheme drawing of the magnetic clutch of the utility model employing, and its middle gear can substitute by belt wheel;

Fig. 5 is the scheme drawing of the Wedge type stopper of the utility model employing.

Number in the figure is:

1, limit rope motor; 2, limit rope brake; 3, limit rope retarder; 4, limit rope drum; 5, limit rope drum bearing; 1 ', middle rope machine machine; 2 ', middle rope brake; 3 ', middle rope retarder; 6, middle rope drum; 5 ', middle rope drum bearing; 7,8, limit rope; 9,10, middle rope; 11, fixed pulley; 12, movable pulley; 13, grab bucket frame; 14, grab bucket; 21, motor; 22, drg; 23, drop-gear box; 24, limit rope drum; 25, bearing; 26, driving wheel (belt pulley or gear); 27, driving band or gear; 28, first clutch; 29, follower (gear or belt pulley); 30, middle rope drum; 31, stopper (wedge or ratchet device); 32, second clutch; 321, gear or belt pulley; 322, magnetic clutch outside friction disc; 323, magnetic clutch internal friction sheet; 324, clutch bushing; 325, power-transfer clutch profile of tooth pawl; 326, axle; 41, electromagnet, 42, electromagnet armature; 43, pull bar; 44, cylinder or axle; 45, tapered wedges; 46, chute; 47, friction inclined-plane; 48, bearing.

Figure 1 shows that the transmission system of two motors of employing (1.1 ') and two decelerators (3.3 ') of prior art. Usually adopt motor and the identical decelerator of gearratio of two cover same capabilities during the design dolly, purpose is to want to allow two cylinder synchronous operations, can work independently again. Among the figure, limit rope drum 4 is used for limit rope 7,8(Fig. 2 of folding and unfolding grab bucket) and rope drum 6 is used for rope 9,10(Fig. 2 of folding and unfolding grab bucket).

Among Fig. 2, therefrom the rope

drum middle rope

9,10 of drawing directly is fixed on the grab bucket frame with wire clips, and the Bian Shengxian that draws from limit rope drum 4 is around to the fixed pulley 11 that is fixed on the grab bucket frame, then on the movable pulley 12 of the framework supporting that is connected with the grab bucket tail end to grab bucket folding hinge place, and the pulley multiplying power of pressing in this way the moving pulley of fixed pulley is drawn returning tightly on limit rope drum 4 with end after the suitable number of turns. Like this, if

middle rope

9,10 brakings,

limit rope

7, 8 descend, and make grab bucket open discharging owing to movable pulley descends; If middle rope is regained by the limit rope drum and promoted, movable pulley moves up, then grab bucket crawl; If limit rope, middle rope rise simultaneously synchronously, then grab bucket is risen, at this moment in the strength of rope can not be bigger than the limit rope, otherwise will make grab bucket be in the discharging state, or grab bucket can not close tightly, the spreading that is in operation is if middle rope, limit rope descend then grab bucket decline simultaneously. Can see that by above-mentioned the middle rope drum 6 that is used for the rope folding and unfolding always is in passive duty, rope drum stopped during stopper made during except discharging, all the other were just followed the limit and restrict in rope closing, put rope. In fact rope needs only very little power in, just can play corresponding effect, and needn't be separately with a cover motor, decelerator drive system.

Fig. 3 is the schematic diagram of transmission system of the present utility model. Among the figure, but motor 21 driving side rope drum 24 and middle rope drum 30. Connected mode and the grab bucket form of its limit rope and middle rope and grab bucket are constant, still as shown in Figure 2. The kind of drive of Fig. 3 is as follows: motor 21 drives limit rope drum 24 by decelerator 23, back shaft on the limit rope drum 24 lengthens installs a belt wheel (or gear) 26, by being with transmission (or gear drive) to middle rope drum 30, belt wheel (or gear) 29 on middle rope drum 30 back shafts is equipped with bearing, it sees Fig. 4 with the first clutch 28(of electromagnet-friction) be connected, first clutch 28 adhesives, middle rope drum 30 rotates, rope drum 30 was in free state during first clutch 28 was decontroled, we are also referred to as the rising clutch this clutch, just only have when rising just to use this clutch 28, the other end of cylinder 30 is equipped with second clutch 32, also claims the decline clutch. This clutch 32 is when cylinder 30 is in free state, do not allow cylinder 30 Free under

steel wire rope

9,10 Action of Gravity Fields, when just first clutch 28 disconnects, second clutch 32 is adhesives, two clutches are in interlocking state, these two clutches are all selected electromagnetic friction clutch, first clutch adhesive when grab bucket 14 is risen, cylinder 30 rope closings, because the function that clutch has overload to skid, so can make the steel wire rope on the cylinder 30 always be in the state (wheel on the cylinder 30 can be done a little bit smallerly) of tightening, grab bucket 14 is opened. When grab bucket descended, first clutch 28 was decontroled, second clutch 32 adhesives, and cylinder 30 14 effects of conducting oneself with dignity of being grabbed bucket are rotated, and to transferring rope, when grab bucket was parked in a certain position, cylinder 30 is subjected to the effect of second clutch, and was slack. Two clutches need not be established separately the handle operation, can with the rotating circuit controls of motor together, the switch of electromagnet can be arranged on the optional position of operating grip, is preferably on the thumb of balanced handle to control.

Grab bucket is during material grasping, and first clutch is preferably opened, and reduces as much as possible the wearing and tearing of clutch, this clutch of adhesive again when treating that grab bucket rises overally. This move pot life Control also can be established the knob operation. At cylinder 30 wedge, ratchet stop 31 are housed, it is the device for discharging and safeguard protection. When cutting off the power supply or break down with discharging, wedge or ratchet stop 31 all have the function that allows cylinder 30 stop operating, and it controls wedge or ratchet work by electromagnet, and voussoir brake drum or ratchet prop up ratchet during the electromagnet outage, during energising, voussoir or ratchet are opened. When discharging, the electromagnet outage, the low firmly ratchet of voussoir braking or ratchet,

middle rope

9,10 brakings,

limit rope

7,8 descends, and discharging is opened in grab bucket 14. Hoist and when descending, the electromagnet energising, voussoir or ratchet are opened. Decline clutch installation form is the same, and to rise clutch the same, just partly regards belt wheel as the cylinder bearing in Fig. 4, is rigidly connected with car body.

Fig. 4 is the schematic diagram of the electromagnetic clutch that the utility model adopts, " mechanical design handbook " first volume second fascicle electromagnetic clutch part that its model can be published referring to Chemical Industry Press, and its middle gear 321 can substitute by belt pulley. Profile of tooth pawl 325 among the figure on the clutch is connected with bolt with belt wheel (or gear), belt wheel (gear) drives outside friction disc 322 by profile of tooth pawl 325 and rotates, just idle running during not adhesive of clutch, when inhale and the time, outside friction disc 322 is with interior friction plate 323 adhesives, interior friction plate 323 drives axle sleeve 324(spline or singly-bound), axle sleeve band moving axis 326 rotates.

The utility model representative type embodiment is the power-transfer clutch that adopts DLM3 type series, and its concrete model is conducted oneself with dignity relevant with hoisting capacity and grab bucket or is condition with the torque.The selection of second clutch also will consider to grab bucket empty bucket when descending, and can make it be in slipping state and the steel rope that descends on the rope drum 30 in making always is in the state of tightening.The installation form of first clutch or second clutch can adopt independent power-transfer clutch, or with so two or more power-transfer clutch series connection.

Figure 5 shows that a kind of Wedge type stopper of the present utility model.Electromagnet armature 42 among the figure in the electromagnet 41 is connected to the tapered wedges 45 that is located in the chute 46 by pull bar 43, tapered wedges 45 has the friction inclined-plane 47 of a locked angle α, its α angle is less than the friction angle of inclined-plane and middle rope drum 44 or middle rope drum axle 44, when unclamping with convenient electromagnet 41, pull bar 43 pulling wedges 45 move and make friction inclined-plane 47 by friction centering rope drum 44 or middle rope drum axle 44 stop to the left side of Fig. 5.And when electromagnet 41 adhesives, remove above-mentioned stop.An embodiment of the present utility model is that wedge 45 is formed from steel.Middle rope drum 44 stop that an interchangeable embodiment of the present utility model is 45 pairs of cast irons of wedge, in this case, the α angle is less than the friction lock dead angle of cast iron to steel.Another interchangeable embodiment of the present utility model is middle rope drum axis 44 stop that 45 pairs of steel of wedge are made, and in this case, the α angle is less than the friction lock dead angle of steel to steel.

Another alternative embodiment of the present utility model is the ratchet device stopper.

Claims

1; the driving system of shedding mechanism is grasped in a kind of grab crane dolly lifting; wherein motor is by the cylinder of retarder transmission folding and unfolding rope; it is characterized in that; in this system; be used for the limit rope drum of folding and unfolding rope and rope drum and middle rope drum and only adopt a motor-driven; this motor is transferred to the limit rope drum that is used for limit rope folding and unfolding by a drop-gear box; and the middle rope drum of the folding and unfolding that is used for restricting is can be with above-mentioned limit rope drum by rope drum shaft mechanical ground, limit synchrodrive by above-mentioned limit rope drum; between the transmission of limit rope drum and middle rope drum; the first clutch of one electromagnet-friction is installed at the spindle nose of middle rope drum; the adhesive when receiving the i.e. grab bucket rising of rope of this power-transfer clutch; receive rope with rope drum in the synchrodrive; and at the other end of the spindle nose of middle rope drum; be equipped with first clutch is in interlocking state and be used to put the second clutch that rope is promptly grabbed bucket and descended; when being used for grab bucket decline, this second clutch give rope drum one friction drag with electromagnet-friction; inertia when rope drum is put rope in preventing rolls; an end of this second clutch and trolley frame fixedly mount for this reason, and the mechanical type stopper of a centering rope drum stop when discharging and safety guard-safeguard also is installed on the middle rope drum.

2, driving system as claimed in claim 1 is characterized in that, described limit rope drum is a gear transmission to the mechanical drive of middle rope drum.

3, driving system as claimed in claim 1 is characterized in that, described limit rope drum is a belt-driving to the mechanical drive of middle rope drum.

4, as any described driving system of claim 1～3, it is characterized in that, described stopper is a Wedge type, this wedge passes through a connecting rod by solenoid actuated, wedge is in a chute, and this wedge slides during electromagnetic actuation, unclamps middle rope drum, and electromagnet is when unclamping, the stop by bevel friction locking cylinder of this wedge.

5, driving system as claimed in claim 4 is characterized in that, described wedge be one with the friction of its inclined-plane and middle rope drum circumference, and rope drum in locking less than the mode of the friction angle on middle rope drum circumference and inclined-plane with the angle of chamfer.

6, driving system as claimed in claim 5 is characterized in that, wedge is made with steel, and cylinder is a cast iron materials, and in this case, the oblique angle of wedge is less than the friction angle of steel to cast iron.

7, driving system as claimed in claim 4 is characterized in that, described wedge is with the friction of its inclined-plane and middle rope drum axis circumference, and rope drum in locking less than the mode of the friction angle on cylinder axis circumference and inclined-plane with the angle of chamfer.

8, driving system as claimed in claim 7 is characterized in that, wedge is made with steel, and the cylinder axis is also made with steel, and in this case, the oblique angle of wedge is less than the friction angle of steel to steel.

9, as any described driving system of claim 1～3, it is characterized in that described stopper is the ratchet device with the clutch of electromagnetic clutch mode.