KR200388173Y1 - Hoist apparatus and small hoist crane with the same - Google Patents

Abstract

By adjusting the speed of the reducer, the hoist with two motors having the same motor capacity is lowered to the underground position where the forklift or payloader with the predetermined weight is to be operated, and the bucket containing the soil is By adjusting, a hoist device capable of lifting and a hoist crane having the same are disclosed. The pair of motors have the same capacity installed and driven apart from each other by a predetermined distance. A pair of reducers are fixed to a pair of motors respectively through a pair of first shafts rotating according to the driving of a pair of motors, and the pair of motors are rotated by adjusting a speed adjusting lever formed at one end according to the weight of a fork crane or a load. Decrease the number at the first or second speed. The pair of wire rope drums are installed to be spaced apart from each other by a predetermined distance between the pair of motors, and one end of the pair of second shafts is rotatably fixed to the pair of reducers, respectively. A pair of brakes are attached to the rear of the pair of motors to control each output torque of the pair of motors to lower or lift the fork-lane or load through the wire ropes wound on the pair of wire rope drums. Forcibly stops the rotation of the wire rope fixed through the second stage.

Description

Hoist apparatus and small hoist crane with the same

The present invention relates to a crane, and more particularly, to a hoist device used for carrying out soil, using a bucket in a narrow place, such as a subway construction site, unloading, transporting and dismantling objects, and a small hoist crane having the same.

Conventionally, a gear reducer of an existing crane used for unloading, transporting and dismantling an object in a narrow place such as a subway construction site lifts loads in accordance with the motor capacity at a single reduction ratio. The formula for calculating the motor capacity is expressed as follows.

[Equation 1]

Where KW is the motor capacity, P is the load, V is the citation speed (m / min), and ?? is the mechanical efficiency (0.9).

For example, when lifting 13 tons of object at a speed of 30 m / min,

Is needed. Using two motors of rated capacity 37KW,

?? 70.8KW <74KW (= 37KW ㅧ 2)

However, under the same conditions, the motor capacity doubles when a 26 ton object is lifted at a speed of 30 m / min (deceleration ratio is single).

Therefore, it is as follows.

?? 141.6KW> 74KW (= 37KW ㅧ 2)

Thus, there is a problem that conventional bucket cranes cannot lift loads or fork cranes heavier than the weight that two motors can lower or lift.

Accordingly, the present invention has been made to solve the above-mentioned problems of the prior art, by adjusting the speed of the reducer, by using a hoist having two motors having the same motor capacity of a forklift or payloader having a predetermined weight It is an object of the present invention to provide a hoist device and a hoist crane having the same, by descending to an underground position to be worked and lifting a bucket containing soil by a fork crane by adjusting the speed of the reducer.

In order to achieve the above object, the present invention is a pair of motors having the same capacity to be installed and driven at a predetermined distance from each other; One end of each of the pair of motors is fixed to the pair of motors through a pair of first shafts rotating according to the driving of the pair of motors, and the speed adjusting lever formed at one end of the pair of motors is adjusted according to the weight of the forklift or the load. A pair of reducers for reducing the rotational speed at a first or second speed; A pair of wire rope drums spaced apart from each other by a predetermined distance between the pair of motors, one end of which is rotatably fixed to the pair of reducers through a pair of second shafts; A wire rope which is formed to be wound around an outer circumference of the pair of wire rope drums to lower or lift the fork lane or a load; And attached to the rear of the pair of motors to control each output torque of the pair of motors so as to lower or lift the fork lane or the load through the wire rope wound around the pair of wire rope drums. It provides a hoist device including a pair of brakes forcibly stopping the rotation of the wire rope is connected and fixed through a second end.

Preferably, the first and second velocities are 15 m / min and 30 m / min, respectively. More preferably, the pair of motors each have a capacity of 37KW / 9.25KW ㅧ 6P / 24P as a pole number conversion motor, and R.P.M. is 1200 at 6 poles and R.P.M. is 300 at 24 poles. Has the function.

The present invention also the main body; A pair of rails fixed to the upper portion of the main body in a horizontal direction; And a hoist device installed on the pair of rails so as to be movable to reciprocate to lower or lift the fork lane or the load.

The hoist device includes a pair of motors having the same capacity to be installed and driven at a predetermined distance apart from each other on the pair of rails; One end of each of the pair of motors is fixed to the pair of motors through a pair of first shafts rotating according to the driving of the pair of motors, and the speed adjusting lever formed at one end of the pair of motors is adjusted according to the weight of the forklift or the load. A pair of reducers for reducing the rotational speed at a first or second speed; A pair of wire rope drums spaced apart from each other by a predetermined distance between the pair of motors, one end of which is rotatably fixed to the pair of reducers through a pair of second shafts; A wire rope which is formed to be wound around an outer circumference of the pair of wire rope drums to lower or lift the fork lane or a load; And attached to the rear of the pair of motors to control each output torque of the pair of motors so as to lower or lift the fork lane or the load through the wire rope wound around the pair of wire rope drums. It provides a small hoist crane including a pair of brakes forcibly stopping the rotation of the wire rope is connected and fixed through a second end.

 Preferably, when the weight of the forklift is 26 tons, the motor requires a motor capacity of 70.8 KW and the small hoist crane lowers the forklift at a speed of 15 m / min, the first speed. More preferably, the small hoist crane further comprises a bucket connected to the wire rope to hold the load.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

1 is a front view showing a small hoist crane having a hoist device according to an embodiment of the present invention. FIG. 2 is a plan view of the small hoist crane shown in FIG. 1. 3 is a side view of the small hoist crane shown in FIG.

The small hoist crane with a hoist device according to the present invention includes a main body 102, a pair of rails 104, a hoist device 106, and a bucket 108.

The pair of rails 104 are fixedly installed in the horizontal direction on the upper portion of the main body 102.

The hoist device 106 is movably installed on the pair of rails 104, respectively, to reciprocate to selectively lower or lift the fork-lane or load to a desired position.

4 is an enlarged plan view of the hoist device 106 in FIG. 2. FIG. 5 is an enlarged view of the speed reducer of the hoist device 104 shown in FIG. 4. FIG. 6 is a partial front view illustrating a bucket operation by the hoist device shown in FIG. 4.

The hoist device 106 according to the present invention includes a pair of motors 402, a pair of reducers 404, a pair of wire rope drums 406, a wire rope 408, and a pair of brakes 410.

The pair of motors 402 have the same capacity to be installed and driven at a predetermined distance from the pair of rails 104. According to the present invention, the pair of motors 402 are preferably pole number conversion motors each having a capacity of 37 KW / 9.25 KW ㅧ 6P / 24P. The pole number conversion motor is a kind of induction motor that can change the number of revolutions by changing the number of poles of the motor by connecting the stator winding. The motor has two RPM functions, and when the six poles have an RPM of 1200, 24 At the pole is a motor with an RPM of 300.

The pair of reduction gears 404 are fixed to the pair of motors 402 at one end through a pair of first shafts 403 which rotate according to the driving of the pair of motors 402, respectively, and the weight of the forklift or the load of the load. By adjusting the speed adjusting lever 502 formed at one end thereof, the rotation speed of the pair of reducers 404 is reduced to the first or second speed. According to an embodiment of the present invention, the first and second speeds are preferably 15 m / min at a high lifting speed and 30 m / min at a low lifting speed.

The pair of wire rope drums 406 are installed to be spaced apart from each other by a predetermined distance between the pair of motors 402, and one end of the pair of second shafts 405 is rotatably fixed to the pair of reducers, respectively.

The wire rope 408 is formed to be wound around the outer circumference of the pair of wire rope drums to lower or lift the fork lane or load.

A pair of brakes 410 are attached to the rear of the pair of motors 402 to control each output torque of the pair of motors 402 so that the wire ropes 408 are wound around the pair of wire rope drums 406. Forcibly stops the rotation of the wire rope 408 which is connected and fixed through the first end or the second end when the fork lane 702 or the load is lowered or lifted.

Bucket 108 is connected to the wire rope 408 of the hoist device 106 to contain the load or soil supplied by the fork lane 702.

If the weight of the fork crane 702 is 26 tons, the motor requires a motor capacity of 70.8 KW and the hoist device lowers the fork crane 702 at a speed of 15 m / min, the first speed.

Therefore, even if the weight is increased to 26 tons, the speed can be reduced by half to lift a large weight.

Hereinafter, using a small hoist crane according to an embodiment of the present invention, the payloader is lowered underground at a subway construction site, the soil is loaded into the bucket with the payloader, and the bucket is lifted by the crane. Will be explained. Figure 7 is a view for explaining the lowering, topdressing, and bucket operation of the fork lane by a small hoist crane according to an embodiment of the present invention.

First, each speed control lever 502 is adjusted so that the speed of the speed reducer 404 becomes a low speed, that is, the descending speed is 15 m / min, and then the hoist device 106 is operated to deepen the fork lane 702 or the payloader. Descend to and place it in the desired basement (deep) location. At this time, the capacity of the motor is required 70.0KW as shown in [Equation 2] below.

[Equation 2]

The hoist device 106 is operated to lower the bucket 108 to deeper depths and to prepare the soil. Dirt the soil with a fork lane or payloader 702 or the like. The bucket 108 is moved up to the haul truck 704 by simultaneously lifting and moving the hoist device. At this time, the speed adjusting lever 502 of the speed reducer 404 is adjusted to a high speed, that is, the lifting speed is 30 m / min to move the bucket 108. Operate the open / close hoist to the truck loader to complete the top cover. The wire rope 408 is always such that the four strands are tensioned. When the topdressing is completed, the bucket 108 is lowered to the depth and the operation is repeated.

Although the present invention has been described as a specific preferred embodiment, the present invention is not limited to the above-described embodiment, it is usually in the field to which the subject innovation belongs without departing from the gist of the subject innovation claimed in the utility model registration claims. Anyone with knowledge of the world can make many variations.

According to the present invention, when unloading, transporting and dismantling an object in a narrow place such as a subway construction site using a crane, by adjusting the speed of the reducer to 15 m / min, two motors having a motor capacity of 37 KW The hoist crane lowers the 26-ton forklift or payloader to the underground (deep) position to work, and adjusts the speed of the reducer to 30 m / min by adjusting the 13-ton bucket with soil by the forkrain. Allow hoist cranes with two motors of capacity to lift.

1 is a front view showing a small hoist crane having a hoist device according to an embodiment of the present invention.

FIG. 2 is a plan view of the small hoist crane shown in FIG. 1.

3 is a side view of the small hoist crane shown in FIG.

4 is an enlarged plan view of the hoist apparatus of FIG. 2.

FIG. 5 is an enlarged view of the reducer of the hoist device shown in FIG. 4.

FIG. 6 is a partial front view illustrating a bucket operation by the hoist device shown in FIG. 4.

Figure 7 is a view for explaining the lowering, topdressing, and bucket operation of the fork lane by a small hoist crane according to an embodiment of the present invention.

<Description of Signs for Main Parts of Drawings>

102: main body 104: rail

      106: hoist device 108: bucket

      402: motor 403: first axis

      404: reducer 405: second axis

406: wire rope drum 408: wire rope

410: brake

Claims (7)

A pair of motors having the same capacity installed and driven apart from each other by a predetermined distance; One end of each of the pair of motors is fixed to the pair of reducers through a pair of first shafts rotating according to the driving of the pair of motors, and the speed adjusting lever formed at one end of the pair of motors is adjusted according to the weight of the forklift or the load. A pair of reducers for reducing the rotational speed at a first or second speed; A pair of wire rope drums spaced apart from each other by a predetermined distance between the pair of motors, one end of which is rotatably fixed to the pair of reducers through a pair of second shafts; A wire rope which is formed to be wound around an outer circumference of the pair of wire rope drums to lower or lift the fork lane or a load; And It is attached to the rear of the pair of motors to control each output torque of the pair of motors to lower or lift the fork lane or the load through the wire rope wound around the pair of wire rope drum first stage or first Hoist device comprising a pair of brakes forcibly interrupting the rotation of the wire rope is connected and fixed through two stages. The hoist apparatus according to claim 1, wherein the first and second speeds are 15 m / min and 30 m / min, respectively. 2. The two R.P.M. 2 motors according to claim 1, wherein the pair of motors each have a capacity of 37KW / 9.25KW P 6P / 24P as a pole number conversion motor, having R.P.M. of 1200 at 6 poles and R.P.M. of 300 at 24 poles. Hoist device with the function. main body; A pair of rails fixed to the upper portion of the main body in a horizontal direction; And A hoist device installed on the pair of rails so as to be movable so as to reciprocate to lower or lift a fork-lane or a load, The hoist device includes a pair of motors having the same capacity to be installed and driven at a predetermined distance apart from each other on the pair of rails; One end of each of the pair of motors is fixed to the pair of motors through a pair of first shafts rotating according to the driving of the pair of motors, and the speed adjusting lever formed at one end of the pair of motors is adjusted according to the weight of the forklift or the load. A pair of reducers for reducing the rotational speed at a first or second speed; A pair of wire rope drums spaced apart from each other by a predetermined distance between the pair of motors, one end of which is rotatably fixed to the pair of reducers through a pair of second shafts; A wire rope which is formed to be wound around an outer circumference of the pair of wire rope drums to lower or lift the fork lane or a load; And It is attached to the rear of the pair of motors to control each output torque of the pair of motors to lower or lift the fork lane or the load through the wire rope wound around the pair of wire rope drum first stage or first Small hoist crane including a pair of brakes forcibly stopping the rotation of the wire rope is connected and fixed through two stages. The two R.P.M. motors according to claim 4, wherein the pair of motors each have a capacity of 37KW / 9.25KW ㅧ 6P / 24P as a pole number conversion motor, and R.P.M. is 1200 at 6 poles and R.P.M. is 300 at 24 poles. Small hoist crane with the function. 5. The small hoist of claim 4, wherein when the weight of the fork crane is 26 tons, the motor requires a motor capacity of 70.8 KW and the small hoist crane lowers the fork crane at a speed of 15 m / min, the first speed. crane. 5. The mini hoist crane according to claim 4, further comprising a bucket connected to the wire rope to hold the load.