CN216235811U - Driving device of lifting frame - Google Patents

Abstract

The utility model provides a driving device of a lifting frame, which comprises a driving motor fixedly arranged at the top of a rack and a balance mechanism arranged on any side of the rack in a sliding manner; the middle of the bottom of the balance mechanism is connected with the middle of the bottom of the lifting frame through a first chain transmission mechanism, and the middle of the top of the balance mechanism is connected with the middle of the top of the lifting frame through a second chain transmission mechanism; the driving motor is connected with the second chain transmission mechanism through a third chain transmission mechanism. The utility model has the advantages that: be provided with balance mechanism, can play balanced effect to the crane, guarantee the stationarity that the crane goes up and down, the condition such as can not appear rocking, shake, and then can avoid the fragment of brick on the crane to drop because of rocking, shake, guarantee production safety.

Description

Driving device of lifting frame

[ technical field ] A method for producing a semiconductor device

The utility model belongs to the technical field of brick production equipment, and particularly relates to a driving device of a lifting frame.

[ background of the utility model ]

At present, bricks are all produced by a brick making machine; the brick making machine is a machine for producing bricks by using stone powder, fly ash, furnace slag, broken stone, sand, water and the like and adding cement as raw materials through hydraulic power, vibration force, aerodynamic force and the like, and is a general name of all machines for producing wall bricks and pavement bricks.

The brick making machine needs to convey the bricks for maintenance after the bricks are made, and the existing method is to convey the bricks made by the brick making machine one by one and stack the bricks at an appointed position, and then convey the stacked bricks for maintenance by a forklift. However, stacking blocks one on top of another tends to cause the blocks to be crushed or crushed, and is inefficient. Aiming at the problem that the existing bricks are easily damaged when stacked, the applicant develops equipment capable of automatically conveying the bricks manufactured by a brick making machine to a frame, and the bricks are driven to ascend to the required height by a lifting frame and are conveyed to the frame. Because the bricks are sent out from the brick making machine one plate by one plate, the whole weight of the bricks and the lifting frame is heavier, and the problem that how to drive the lifting frame to stably lift is needed to be solved urgently is solved. In view of the above, the present inventors have conducted extensive studies to overcome the above-mentioned drawbacks of the prior art, and have devised the present invention.

[ Utility model ] content

The utility model aims to solve the technical problem of providing a driving device of a lifting frame, which can drive the lifting frame and bricks to stably lift so that the bricks cannot fall off.

The utility model is realized by the following steps: a driving device of a lifting frame comprises a driving motor fixedly arranged at the top of a frame and a balance mechanism arranged on any side of the frame in a sliding manner; the middle of the bottom of the balance mechanism is connected with the middle of the bottom of the lifting frame through a first chain transmission mechanism, and the middle of the top of the balance mechanism is connected with the middle of the top of the lifting frame through a second chain transmission mechanism; the driving motor is connected with the second chain transmission mechanism through a third chain transmission mechanism.

Further, the first chain transmission mechanism comprises a first chain wheel, a second chain wheel and a first multi-row chain; the first chain wheel is rotatably arranged at the lower part of the rack through a first rotating shaft and is positioned below the middle of the bottom of the lifting frame; the second chain wheel is rotatably arranged at the lower part of the rack through a second rotating shaft and is positioned below the middle of the bottom of the balance mechanism; one end of the first multi-row chain is connected with the middle of the bottom of the balance mechanism, and the other end of the first multi-row chain is connected with the middle of the bottom of the lifting frame; the first plurality of rows of chains pass under the first and second sprockets, and the first and second sprockets each mesh with the first plurality of rows of chains.

Further, first multirow chain forms horizontal chain straight section between first sprocket and second sprocket, and first multirow chain forms first vertical chain straight section between first sprocket and crane, and first multirow chain forms second vertical chain straight section between second sprocket and balance mechanism.

Further, the second chain transmission mechanism comprises a third chain wheel, a fourth chain wheel, a fifth chain wheel and a second multi-row chain; the third chain wheel is rotatably arranged at the top of the rack through a third rotating shaft, the fourth chain wheel is rotatably arranged at the top of the rack through a fourth rotating shaft, and the fifth chain wheel is rotatably arranged at the top of the rack through a fifth rotating shaft; the third chain wheel is positioned above the middle of the top of the lifting frame, the fifth chain wheel is positioned above the middle of the top of the balance mechanism, and the fourth chain wheel is positioned between the third chain wheel and the fifth chain wheel; one ends of the second rows of chains are connected with the middle of the top of the lifting frame, and the other ends of the second rows of chains are connected with the middle of the top of the balance mechanism; the second multi-row chain passes through the top of the third chain wheel, the bottom of the fourth chain wheel and the top of the fifth chain wheel in sequence, and the third chain wheel, the fourth chain wheel and the fifth chain wheel are all meshed with the second multi-row chain.

Further, the second multi-row chain forms a third vertical chain straight section between the lifting frame and the third chain wheel, the second multi-row chain forms a first chain inclined section between the third chain wheel and the fourth chain wheel, the second multi-row chain forms a second chain inclined section between the fourth chain wheel and the fifth chain wheel, and the second multi-row chain forms a fourth vertical chain straight section between the fifth chain wheel and the balance mechanism.

Further, the third chain transmission mechanism comprises a sixth chain wheel, a seventh chain wheel and a third multi-row chain; the sixth chain wheel is connected with the driving motor through a speed reducer; the seventh chain wheel is arranged on the third rotating shaft; the third plurality of rows of chains are connected between the sixth sprocket and the seventh sprocket.

Furthermore, the first, second and third rows of chains are all three rows of chains.

Further, the balancing mechanism comprises a balancing weight assembling frame and at least one balancing weight assembled in the balancing weight assembling frame; the outer both sides of balancing weight assembly frame are equipped with the sliding part, be equipped with in the frame with sliding part complex spout.

Furthermore, both sides in the balancing weight assembly frame are provided with balancing weight assembly groove, the upper end in balancing weight assembly groove is formed with the assembly opening.

Furthermore, the top of the balancing weight assembly frame is provided with a balancing weight jacking bolt.

By adopting the technical scheme of the utility model, the utility model at least has the following beneficial effects:

1. the lifting frame is provided with the balance mechanism, so that the lifting frame can be balanced, the lifting stability of the lifting frame is ensured, the conditions of shaking, shaking and the like are avoided, the bricks on the lifting frame can be prevented from falling off due to shaking and shaking, and the production safety is ensured; meanwhile, the lifting frame is driven to lift through the matching of the first chain transmission mechanism, the second chain transmission mechanism and the third chain transmission mechanism, so that the slipping condition cannot occur in the conveying process, the transmission is accurate, the efficiency is high, the transmission power is high, the overload capacity is large, and the high efficiency and the safety of the whole brick conveying process can be ensured; the chain has strong adaptability and can work in various severe environments.

2. Set up the balancing weight assembly groove through the both sides in the balancing weight assembly frame to form the assembly opening in the upper end of balancing weight assembly groove, make when specifically using, can increase or reduce the balancing weight toward in the balancing weight assembly frame as required, in order to reach better balanced effect, use the flexibility strong.

[ description of the drawings ]

The utility model will be further described with reference to the following examples with reference to the accompanying drawings.

Fig. 1 is a schematic structural view of a driving device of a crane of the utility model;

figure 2 is a schematic structural view of a driving device of the lifting frame when the lifting frame is removed;

FIG. 3 is a schematic view of the balance mechanism of the present invention;

FIG. 4 is a schematic structural view of a counterweight assembly frame according to the present invention;

FIG. 5 is one of the schematic structural views of the first chain drive mechanism of the present invention;

FIG. 6 is a second schematic structural view of the first chain transmission mechanism of the present invention;

FIG. 7 is a schematic structural view of a second chain drive mechanism and a third chain drive mechanism according to the present invention;

fig. 8 is a schematic view of the second and third chain drive mechanisms of the present invention with the chain removed.

Description of reference numerals:

1-a frame, 11-a chute, 2-a drive motor, 3-a balance mechanism, 31-a counterweight assembly frame, 311-a counterweight assembly groove, 312-an assembly opening, 313-a counterweight puller bolt, 314-a first chain connector, 315-a second chain connector, 32-a counterweight, 33-a sliding part, 4-a first chain transmission mechanism, 41-a first sprocket, 42-a second sprocket, 43-a first multi-row chain, 431-a horizontal chain straight section, 432-a first vertical chain straight section, 433-a second vertical chain straight section, 44-a first rotating shaft, 441-a first rotating shaft seat, 45-a second rotating shaft, 451-a second rotating shaft seat, 5-a crane, 6-a second chain transmission mechanism, 61-a third sprocket, 62-fourth sprocket, 63-fifth sprocket, 64-second multi-row chain, 641-third vertical straight chain section, 642-first oblique chain section, 643-second oblique chain section, 644-fourth straight vertical chain section, 65-third rotating shaft, 651-third rotating shaft seat, 66-fourth rotating shaft, 661-fourth rotating shaft seat, 67-fifth rotating shaft, 671-fifth rotating shaft seat, 7-third chain transmission mechanism, 71-sixth sprocket, 72-seventh sprocket, 73-third multi-row chain and 74-speed reducer.

[ detailed description ] embodiments

For a better understanding of the technical aspects of the present invention, reference will now be made in detail to the embodiments of the present invention, which are illustrated in the accompanying drawings.

Referring to fig. 1 to 8, the driving device of the lifting frame 5 of the present invention includes a driving motor 2 fixed on the top of a frame 1 and a balance mechanism 3 slidably disposed on any side of the frame 1; the middle of the bottom of the balance mechanism 3 is connected with the middle of the bottom of the lifting frame 5 through a first chain transmission mechanism 4, and the middle of the top of the balance mechanism 3 is connected with the middle of the top of the lifting frame 5 through a second chain transmission mechanism 6; the driving motor 2 is connected with the second chain transmission mechanism 6 through a third chain transmission mechanism 7. During operation, the third chain transmission mechanism 7 is driven to transmit by the output power of the driving motor 2, the third chain transmission mechanism 7 drives the second chain transmission mechanism 6 to transmit when transmitting, the second chain transmission mechanism 6 can transmit the power to the first chain transmission mechanism 4 through the balance mechanism 3 when transmitting, and the lifting frame 5 is driven to ascend or descend by the cooperation of the second chain transmission mechanism 6 and the first chain transmission mechanism 4. The balance mechanism 3 can play a balance role in the lifting frame 5, ensure the lifting stability of the lifting frame 5, avoid the conditions of shaking, shaking and the like, further avoid the falling of the bricks on the lifting frame 5 due to shaking and ensure the production safety; the lifting frame 5 is driven to lift through the matching of the first chain transmission mechanism 4, the second chain transmission mechanism 6 and the third chain transmission mechanism 7, so that the slipping condition cannot occur in the conveying process, the transmission is accurate, the efficiency is high, the transmission power is high, the overload capacity is large, and the high efficiency and the safety of the whole brick conveying process can be ensured; meanwhile, the chain has strong adaptability and can work in various severe environments.

Preferably, the first chain transmission mechanism 4 includes a first sprocket 41, a second sprocket 42 and a first plurality of rows of chains 43; the first chain wheel 41 is rotatably arranged at the lower part of the frame 1 through a first rotating shaft 44, and the first chain wheel 41 is positioned below the middle of the bottom of the lifting frame 5; the second chain wheel 42 is rotatably arranged at the lower part of the frame 1 through a second rotating shaft 45, and the second chain wheel 42 is positioned below the middle of the bottom of the balance mechanism 3; the first rotating shaft 44 is rotatably arranged at the lower part of the frame 1 through a first rotating shaft seat 441, and the second rotating shaft 45 is rotatably arranged at the lower part of the frame 1 through a second rotating shaft seat 451; by arranging the first sprocket 41 below the bottom middle of the crane 5 and the second sprocket 42 below the bottom middle of the balancing mechanism 3, the first multi-row chain 43 can better connect the balancing mechanism 3 and the crane 5;

one end of the first multi-row chain 43 is connected with the middle of the bottom of the balance mechanism 3, and the other end of the first multi-row chain 43 is connected with the middle of the bottom of the lifting frame 5; the first multi-row chain 43 passes through the bottom of the first sprocket 41 and the second sprocket 42, and the first sprocket 41 and the second sprocket 42 are engaged with the first multi-row chain 43 to realize the transmission of the first multi-row chain 43.

Preferably, the first plurality of rows of chains 43 form a horizontal chain straight section 431 between the first sprocket 41 and the second sprocket 42, the first plurality of rows of chains 43 form a first vertical chain straight section 432 between the first sprocket 41 and the crane 5, and the first plurality of rows of chains 43 form a second vertical chain straight section 433 between the second sprocket 42 and the balancing mechanism 3; the first vertical chain straight section 432 is perpendicular to the horizontal chain straight section 431, and the second vertical chain straight section 433 is perpendicular to the horizontal chain straight section 431. Through the design of the first chain wheel 41, the second chain wheel 42 and the first multi-row chain 43, the bottom of the lifting frame 5 only receives the acting force in the vertical direction in the lifting process, and the stable lifting of the lifting frame 5 is facilitated.

Preferably, the second chain transmission 6 comprises a third sprocket 61, a fourth sprocket 62, a fifth sprocket 63 and a second plurality of rows of chains 64; the third chain wheel 61 is rotatably arranged at the top of the frame 1 through a third rotating shaft 65, the fourth chain wheel 62 is rotatably arranged at the top of the frame 1 through a fourth rotating shaft 66, and the fifth chain wheel 63 is rotatably arranged at the top of the frame 1 through a fifth rotating shaft 67; the third chain wheel 61 is positioned above the middle of the top of the lifting frame 5, the fifth chain wheel 63 is positioned above the middle of the top of the balance mechanism 3, and the fourth chain wheel 62 is positioned between the third chain wheel 61 and the fifth chain wheel 63; the third rotating shaft 65 is rotatably arranged at the top of the frame 1 through a third rotating shaft seat 651, the fourth rotating shaft 66 is rotatably arranged at the top of the frame 1 through a fourth rotating shaft seat 661, and the fifth rotating shaft 67 is rotatably arranged at the top of the frame 1 through a fifth rotating shaft seat 671; the second multi-row chain 64 can better connect the balancing mechanism 3 and the lifting frame 5 by arranging the third chain wheel 61 above the top middle of the lifting frame 5 and the fifth chain wheel 63 above the top middle of the balancing mechanism 3;

one end of the second multi-row chain 64 is connected with the middle of the top of the lifting frame 5, and the other end of the second multi-row chain 64 is connected with the middle of the top of the balance mechanism 3; the second multi-row chain 64 passes through the top of the third chain wheel 61, the bottom of the fourth chain wheel 62 and the top of the fifth chain wheel 63 in sequence, and the third chain wheel 61, the fourth chain wheel 62 and the fifth chain wheel 63 are all meshed with the second multi-row chain 64 to realize the transmission of the second multi-row chain 64. The second multi-row chain 64 passes through the top of the third chain wheel 61, the bottom of the fourth chain wheel 62 and the top of the fifth chain wheel 63 in sequence, so that the second multi-row chain 64 can be better pressed, and the second multi-row chain 64 is ensured not to be loosened and offset in the using process.

Preferably, the second plurality of rows of chains 64 form a third straight vertical chain segment 641 between the crane 5 and the third sprocket 61, the second plurality of rows of chains 64 form a first inclined chain segment 642 between the third sprocket 61 and the fourth sprocket 62, the second plurality of rows of chains 64 form a second inclined chain segment 643 between the fourth sprocket 62 and the fifth sprocket 63, and the second plurality of rows of chains 64 form a fourth straight vertical chain segment 644 between the fifth sprocket 63 and the balancing mechanism 3. Through the design of the third chain wheel 61, the fourth chain wheel 62, the fifth chain wheel 63 and the second multi-row chain 64, the top of the lifting frame 5 only receives acting force in the vertical direction in the lifting process; because whole crane 5 only receives vertical direction's effect at the in-process of going up and down, consequently crane 5 can not rock and shake at the in-process of going up and down, and stability is good.

Preferably, the third chain transmission mechanism 7 includes a sixth sprocket 71, a seventh sprocket 72, and a third plurality of rows of chains 73; the sixth chain wheel 71 is connected with the driving motor 2 through a speed reducer 74; the seventh sprocket 72 is disposed on the third rotating shaft 65; the third multi-row chain 73 is connected between the sixth sprocket 71 and the seventh sprocket 72. When the chain transmission mechanism works, the driving motor 2 outputs driving force to the speed reducer 74, the driving force is transmitted to the sixth chain wheel 71 after being reduced by the speed reducer 74, the sixth chain wheel 71 drives the third multi-row chains 73 to transmit, and the power is transmitted to the second chain transmission mechanism 6 through the seventh chain wheel 72.

Preferably, in order to ensure the strength of the first, second and third rows of chains 43, 64 and 73, the first, second and third rows of chains 43, 64 and 73 are all three rows of chains.

The first chain transmission mechanism 4, the second chain transmission mechanism 6 and the third chain transmission mechanism 7 work as follows: when the lifting frame 5 needs to be driven to ascend to a certain height, the driving motor 2 rotates forwards to output driving force to the sixth chain wheel 71, and the sixth chain wheel 71, the seventh chain wheel 72 and the third multi-row chains 73 are matched together to drive the third rotating shaft 65 to rotate forwards; the third axis of rotation 65 can drive third sprocket 61, fourth sprocket 62, fifth sprocket 63 and second multirow chain 64 corotation together at the in-process of corotation to up pull the top of crane 5, in this in-process balance mechanism 3 can slide down, and the one end that first multirow chain 43 and crane 5 are connected can be up pulled, thereby realizes driving whole crane 5 and rises. Similarly, when the lifting frame 5 needs to be driven to descend to a certain height, the driving motor 2 reversely rotates to output driving force to the sixth chain wheel 71, and the sixth chain wheel 71, the seventh chain wheel 72 and the third multi-row chain 73 are matched to drive the third rotating shaft 65 to reversely rotate; the third axis of rotation 65 can drive third sprocket 61, fourth sprocket 62, fifth sprocket 63 and second multirow chain 64 in the in-process of reversal and reverse together to upwards pull the top of balance mechanism 3, balance mechanism 3 can drive first multirow chain 43 and pull down the bottom of crane 5 at this in-process, thereby realizes driving whole crane 5 and descends.

Preferably, the balancing mechanism 3 includes a counterweight mounting frame 31 and at least one counterweight 32 mounted in the counterweight mounting frame 31; the outer both sides of balancing weight assembly frame 31 are equipped with sliding part 33, be equipped with in frame 1 with sliding part 33 complex spout 11, can realize the upper and lower slip function of whole balancing weight assembly frame 31 through the cooperation of sliding part 33 and spout 11. In practical implementation, in order to reduce the friction between the sliding portion 33 and the sliding slot 11, the sliding portion 33 is rotatably connected to the counterweight mounting frame 31, for example, a bearing may be disposed between the sliding portion 33 and the counterweight mounting frame 31, so that during the sliding of the sliding portion 33 along the sliding slot 11, the sliding portion 33 itself can rotate, and thus the friction generated by the contact between the sliding portion 33 and the sliding slot 11 can be reduced.

Preferably, the counterweight mounting frame 31 is provided at both sides thereof with counterweight mounting grooves 311, and the upper end of the counterweight mounting grooves 311 is formed with mounting openings 312. Set up balancing weight assembly groove 311 through both sides in balancing weight assembly frame 31 to form assembly opening 312 in balancing weight assembly groove 311's upper end, make when specifically using, can increase or reduce balancing weight 32 toward balancing weight assembly frame 31 in as required, in order to reach better balanced effect, use the flexibility strong.

Preferably, the top of the counterweight mounting frame 31 is provided with a counterweight jacking bolt 313. After the balancing weight 32 to be used is assembled in the balancing weight assembling frame 31, the balancing weight jacking bolt 313 can be rotated downwards, so that the balancing weight jacking bolt 313 jacks the top of the balancing weight 32, and the balancing weight 32 cannot move; in a similar way, when the number of the balancing weights 32 needs to be increased or decreased, the balancing weight jacking bolt 313 can be rotated upwards to enable the balancing weight jacking bolt 313 to leave the balancing weight 32, so that the increase or decrease operation of the balancing weight 32 is facilitated. In order to better press the counterweight 32 from the top downwards, the counterweight pressing bolts 313 are arranged at both ends of the top of the counterweight assembling frame 31.

Preferably, the top middle of the counterweight assembly frame 31 is provided with a first chain connecting piece 314, and the second multi-row chains 64 are fixedly connected with the first chain connecting piece 314; the middle of the bottom of the counterweight assembly frame 31 is provided with a second chain connecting part 315, and the first multi-row chains 43 are fixedly connected with the second chain connecting part 315.

Although specific embodiments of the utility model have been described above, it will be understood by those skilled in the art that the specific embodiments described are illustrative only and are not limiting upon the scope of the utility model, and that equivalent modifications and variations can be made by those skilled in the art without departing from the spirit of the utility model, which is to be limited only by the appended claims.

Claims (10)

1. The utility model provides a drive arrangement of crane which characterized in that: comprises a driving motor fixedly arranged at the top of a frame and a balancing mechanism arranged at any side of the frame in a sliding way; the middle of the bottom of the balance mechanism is connected with the middle of the bottom of the lifting frame through a first chain transmission mechanism, and the middle of the top of the balance mechanism is connected with the middle of the top of the lifting frame through a second chain transmission mechanism; the driving motor is connected with the second chain transmission mechanism through a third chain transmission mechanism.

2. A drive for a crane as claimed in claim 1, wherein: the first chain transmission mechanism comprises a first chain wheel, a second chain wheel and a first multi-row chain; the first chain wheel is rotatably arranged at the lower part of the rack through a first rotating shaft and is positioned below the middle of the bottom of the lifting frame; the second chain wheel is rotatably arranged at the lower part of the rack through a second rotating shaft and is positioned below the middle of the bottom of the balance mechanism; one end of the first multi-row chain is connected with the middle of the bottom of the balance mechanism, and the other end of the first multi-row chain is connected with the middle of the bottom of the lifting frame; the first plurality of rows of chains pass under the first and second sprockets, and the first and second sprockets each mesh with the first plurality of rows of chains.

3. A crane driving apparatus as claimed in claim 2, wherein: the first multi-row chain forms a horizontal chain straight section between the first chain wheel and the second chain wheel, the first multi-row chain forms a first vertical chain straight section between the first chain wheel and the lifting frame, and the first multi-row chain forms a second vertical chain straight section between the second chain wheel and the balance mechanism.

4. A crane driving apparatus as claimed in claim 2, wherein: the second chain transmission mechanism comprises a third chain wheel, a fourth chain wheel, a fifth chain wheel and a second multi-row chain; the third chain wheel is rotatably arranged at the top of the rack through a third rotating shaft, the fourth chain wheel is rotatably arranged at the top of the rack through a fourth rotating shaft, and the fifth chain wheel is rotatably arranged at the top of the rack through a fifth rotating shaft; the third chain wheel is positioned above the middle of the top of the lifting frame, the fifth chain wheel is positioned above the middle of the top of the balance mechanism, and the fourth chain wheel is positioned between the third chain wheel and the fifth chain wheel; one ends of the second rows of chains are connected with the middle of the top of the lifting frame, and the other ends of the second rows of chains are connected with the middle of the top of the balance mechanism; the second multi-row chain passes through the top of the third chain wheel, the bottom of the fourth chain wheel and the top of the fifth chain wheel in sequence, and the third chain wheel, the fourth chain wheel and the fifth chain wheel are all meshed with the second multi-row chain.

5. A crane driving apparatus as claimed in claim 4, wherein: the second multi-row chain forms a third vertical chain straight section between the lifting frame and the third chain wheel, the second multi-row chain forms a first chain inclined section between the third chain wheel and the fourth chain wheel, the second multi-row chain forms a second chain inclined section between the fourth chain wheel and the fifth chain wheel, and the second multi-row chain forms a fourth vertical chain straight section between the fifth chain wheel and the balance mechanism.

6. A crane driving apparatus as claimed in claim 4, wherein: the third chain transmission mechanism comprises a sixth chain wheel, a seventh chain wheel and a third multi-row chain; the sixth chain wheel is connected with the driving motor through a speed reducer; the seventh chain wheel is arranged on the third rotating shaft; the third plurality of rows of chains are connected between the sixth sprocket and the seventh sprocket.

7. A crane driving apparatus as claimed in claim 6, wherein: the first, second and third rows of chains are all three rows of chains.

8. A drive for a crane as claimed in claim 1, wherein: the balancing mechanism comprises a balancing weight assembling frame and at least one balancing weight assembled in the balancing weight assembling frame; the outer both sides of balancing weight assembly frame are equipped with the sliding part, be equipped with in the frame with sliding part complex spout.

9. A drive for a crane as claimed in claim 8, wherein: and two sides in the balancing weight assembling frame are provided with balancing weight assembling grooves, and assembling openings are formed at the upper ends of the balancing weight assembling grooves.

10. A drive for a crane as claimed in claim 8, wherein: and a balancing weight jacking bolt is arranged at the top of the balancing weight assembling frame.

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