WO2006135132A1

WO2006135132A1 - Hoist

Info

Publication number: WO2006135132A1
Application number: PCT/KR2005/002994
Authority: WO
Inventors: Duck-Rae Cho
Original assignee: Korea Gorbel Co., Ltd.
Priority date: 2005-06-14
Filing date: 2005-09-10
Publication date: 2006-12-21
Also published as: KR20060131009A; KR100715802B1; CN101018733A; CN100503417C

Abstract

The present invention discloses a hoist that is provided with a driving part that is integrally formed with a decelerator in a shape of flange to one side of a main frame in such a manner as to be operated in cooperation with a wire drum, with a traveling part that has a wheel coupled to a bearing at the both sides thereof through a space portion opened at the inside thereof, the wheel having an involute spline gear groove into which an involute spline gear of a traveling shaft of a traveling driving part is inserted such that the traveling part is detachably coupled with a traveling driving part, whereby the weight and volume of the main frame are reduced, to thereby make the production costs substantially lowered, and the driving part comprised of the decelerator and the brake is formed of a single body and the traveling part is detachably mounted in a simple manner, to thereby make the installation and exchange substantially easy, reduce the maintenance costs, make the conveyance costs of the driving part and the traveling part greatly lowered, and make the installation after the conveyance substantially simple.

Description

HOIST

Technical Field

[1] The present invention relates to a hoist, and more particularly, a hoist for transporting materials or objects, that is provided with a driving part that is integrally formed with a decelerator in a shape of flange at one side of a main frame in such a manner as to be operated in cooperation with a wire drum, and with a traveling part that has a wheel coupled to a bearing at the both sides thereof through a space portion opened at the inside thereof, the wheel having an involute spline gear groove into which an involute spline gear of a traveling shaft of a traveling driving part is inserted such that the traveling part is detachably coupled with a traveling driving part, whereby the weight and volume of the main frame are minimized, to thereby make the production costs substantially lowered, and the driving part provided with the decelerator and the brake is formed of a single body and the traveling part is detachably mounted in a simple manner, to thereby make the installation and exchange substantially easy, reduce the maintenance and repair costs, make the conveyance costs of the driving part and the traveling part greatly lowered, and make the installation after the conveyance substantially simple. Background Art

[2] Generally, a hoist is used to transport materials or objects at storehouses, train stations, and other places, and to assemble/disassemble machines at factories.

[3] The hoist is one of the machinery for lifting materials by using a wire rope, which works as a set together with a prime mover, a gear reduction part and a winding drum, and it lifts the materials by means of a hook mounted at the end of the winding rope.

[4] Generally, the kinds of hoists include electric hoists and air hoists. The electric hoist is a small-sized hoist wherein a small-sized electric motor, a winding drum with planetary-gear type accelerating device mounted thereon, an electromagnetic brake for holding an object, and a load brake for controlling the speed while moving the object downwardly are all contained in a relatively small housing. Thus, the electric hoist is traveled in such a manner as to be attached to the end of a jib or on a rail along the flange at the lower side of I-shaped beam, thereby lifting the object. The electric hoist is operated in an electric motor-driving way by the manipulation of a rope on the ground, in a button-pressing way, and in a remote-controlled way. There are a variety of kinds of the electronic hoists in accordance with the places to be operated and the structures of the machines contained therein. For instance, low-head type hoists are used in a place having a low ceil, and double-rail type hoists are used when traveling on the two rails. In coal mines and chemical factories, on the other hand, the air hoists are used to avoid the danger of gas explosion.

[5] One of conventional hoists that hoists an object and conveys it transversely is illustrated in FIG.1.

[6] As shown in FIG.l, the conventional hoist 10 is configured such that a wire drum

12 on which a wire rope is wound is mounted onto the upper portion of a main frame

11, a traction motor 13 is mounted at one side of the wire drum 12, a decelerator 15 for decelerating a winding speed and a brake 16 for stopping winding the wire rope are mounted on the other side of the wire drum 12, while connected to the traction motor

13 by means of an intermediate shaft 14 that is formed in such a manner as to be supported along the inner central portion of the wire drum 12, and wheels 18 are mounted at the both sides of the front and rear of the lower portion of the main frame

11 and coupled with a traveling motor 17 such that they are rotated by the actuation of the traveling motor 17, to thereby conduct traverse traveling.

[7] Under the above configuration where the hoist 10 has the intermediate shaft 14 mounted therein, if the traction motor 13 is driven, the winding speed is adjusted by the decelerator 15 connected by means of the intermediate shaft 14 at the other side of the traction motor 13, to thereby wind the object to be transported, and then, the wheels 18 that are actuated by the traveling motor 17 are rotated to thereby transport the mateials. In an emergency like power-off, malfunction, and so on, the brake 16 that is mounted at the front end of the intermediate shaft 14 is operated to stop the winding process.

[8] The conventional hoist 10 is provided with the intermediate shaft 14 connected to the traction motor 13 that is extended along the inner side of the wire drum 12 to the decelerator 15 and the brake 16, such that it becomes long in length, which causes the loss of power to be greatly generated. Further, if the width of the wire drum 12 is increased, the intermediate shaft 14 should be accordingly increased, which causes a problem in that the wire drum 12 cannot be increased over a predetermined width.

[9] Additionally, the hoist 10 hoists the object as the intermediate shaft 13 that is extended to the both ends of the wire drum 12 is rotated, and thus, if the elongated intermediate shaft 14 is rotated at a relatively high speed, the object may be broken by the vibration generated during the rapid rotation thereof. To avoid this problem, the intermediate shaft 14 should be rotated within a predetermined speed, which gives limitations in determining the capacity and speed of the traction motor 13. Of course, this gives limitations in determining the weight of the object to be conveyed.

[10] To address and solve these problems, thus, another conventional hoist adapted to convey a relatively heavy object by using a motor rotating at a high speed will be illustrated in FIG.2. [11] As shown in FIG.2, another conventional hoist 20 is configured wherein a de- celerator 24 operated in cooperation with a traction motor 23 on which a brake 25 is provided is mounted at one side of a wire drum 22, such that the traction motor 23 is rotated to supply power to the wire drum 22, to thereby rotate the wire drum 22, the d ecelerator 24 and the traction motor 23 are horizontally fixed on the upper portion of a main frame 21 where the wire drum 22 is mounted, wheels 28 are mounted at the both sides of the front and rear of the lower portion of the main frame 21, and a traveling decelerator 27 and a traveling motor to which a traveling brake 26a is mounted are formed at one side of each wheel 28 in such a manner as to be operated in cooperation with each other.

[12] Under the above configuration of the hoist 20, the wire drum 22, the traction motor

23, the brake 25, the decelerator 24, the traveling motor 26, the traveling decelerator 27, and the wheels 28 are mounted on the upper and lower portions of the main frame 21 in a horizontal relation with one another, such that each of the above-mentioned parts is horizontally fixed by occupying a relatively large space portion, which results in a substantially bulky structure. Thereby, the whole weight is increased to cause the capacity of the traveling system to become large, which results in undesirable increases of installation and processing costs.

[13] Additionally, since a support sheave 29 that is adapted to support the wire drum 22 and the wire rope thereon is formed in a perpendicular relation with respect to the wire drum 22, the loss of power is generated by the angle difference from the object to be conveyed at the time of pulling the object, such that the traction motor 23 should have a larger capacity than the object to be conveyed, which causes the production costs to be greatly raised.

[14] Moreover, the decelerator 24 is configured in such a manner that a gear is housed in a casing partitioned into upper and lower portions and oil is retained therein, connecting the traction motor 23 to the wire drum 22 so as to be operated in cooperation with each other. If the system works for a long period of time, however, the oil might be leaked from the connected portions. The coupling of the decelerator 24 with the traction motor 23 and the wire drum 22 is made in a forcedly fitting way, such that it is difficulty to conduct the assembling and disassembling process and the repairing, which causes the maintenance costs to be raised.

[15] The wheels 28 are fixedly mounted on the both sides of the front and rear portions of the lower portion of the main frame 21 in such a manner as to conduct traverse traveling by the operation of the traveling motor 17, such that the main frame formed integrally with the wheels 28 is installed by occupying a relatively large area, which makes the production process complicated and also causes the production costs to be raised. [16] Furthermore, the wheels 28 are coupled with the traveling motor 27 and are rotated by the driving of the traveling motor 27 in such a manner as to conduct traverse traveling, and in which case, the wheels 28 are formed integrally with the main frame 21, so that they are not separated from the main frame, which causes the conveyance costs to be raised and as a result, in case of conveying a relatively large capacity of hoist, the installation costs should be raised.

Disclosure of Invention Technical Solution

[17] Accordingly, the present inventor has been made to solve the above-described problems occurring in the prior art, and it is an object of the present invention to provide a hoist that can connect a winding sheave formed at the lower portion of a wire drum to a driving sheave provided with a hook catching an object to be lifted in a parallel relation with each other, can be coupled with a decelerator and a brake that are formed integrally to each other in a shape of flange at one side portion of a main frame, and can detachably mount a traveling part to the lower portion of the main frame in a simple manner, such that each of the parts can be separately packaged, which makes the installation and separation of the parts substantially easy and greatly reduces the conveyance costs for the system.

[18] It is another object of the present invention to provide a hoist that can be provided with a brake and a decelerator that are formed integrally to each other in a shape of flange at one side portion of a main frame and can detachably mount a traveling part to the lower portion of the main frame to thereby conduct traverse traveling by the rotation of wheels, such that each of the parts can be freely exchanged with one in accordance with the load and size of an object, which enhances the generality of the product and improves the power efficiency by connecting the parts in series.

[19] It is still another object of the present invention to provide a hoist that can be provided with each of wheels that has an involute spline gear groove formed along the outer peripheral surface of a coupling through-hole formed in the central portion thereof, and with a traveling shaft that has an involute spline gear formed along the outer peripheral surface thereof, such that the traveling shaft is inserted into each wheel and thus coupled with the wheel, which makes the assembling process easy and increases the rotation efficiency according to the coupling between the gears.

[20] It is yet another object of the present invention to provide a hoist that can be provided with a casing that is formed to have the wheel and the traveling shaft coupled by means of the involute spline gear formed on the traveling shaft at the inside thereof, and with a space portion that is opened to insert a bearing thereinto and fixed to the main frame by means of a sealing, such that the installation space of the bearing is reduced and the bearing is fitted along the outer peripheral surface of the traveling shaft, which improves the assembling capability of the product.

[21] It is still yet another object of the present invention to provide a hoist that can be configured such that oil is supplied to the inside of the space portion where the bearing is mounted for smoothly rotating the bearing, and a wheel is mounted to the opened side of the space portion and fixed by means of a sealing to the coupled portions with the space portion for preventing the oil stored in the inside of the space portion from being leaked, which reduces the number of parts and the installation space to thereby increase the installation efficiency.

[22] It is still another object of the present invention to provide a hoist that can be provided with a casing that is formed to eccentrically place the center of a wheel coupled by means of a sealing to the end portion of a space portion and the center of the outer race of a bearing mounted in the inside of the space portion, such that the wheel is coupled with the traveling part within a predetermined eccentric range, which makes the assembling work easy and reduces the production costs.

[23] It is still another object of the present invention to provide a hoist that can be provided with a plurality of fastening means for coupling the traveling part with the main frame, each of the plurality of fastening means having a fixing shaft fixedly coupled to the lower portion of the main frame and a fixing screw mounted at the both sides of the fixing shaft, such that the traveling part can be firmly fixed to the main frame, which allows the fixing to be rigid and prevents the traveling part from being swung, to thereby make the life period increased.

[24] It is still another object of the present invention to provide a hoist that can be provided with a main frame that has a coupling groove formed at the portions to be coupled with a driving motor, a brake, a decelerator, and a traveling part, having a space portion upon coupling where a distance collar is inserted, and that has a fastening means fastened into the coupling groove, such that only the coupling portion of each part is treated, without the processing for the entire portion of the parts to be coupled, which reduces the processing costs.

[25] It is still another object of the present invention to provide a hoist that can be provided with a plurality of wheels that are coupled at the lower side of a main frame by means of a hinge-coupling part, such that a relatively heavy object can be conveyed by using the plurality of wheels, which enables the conveying efficiency to be greatly high.

Brief Description of the Drawings

[26] Further objects and advantages of the invention can be more fully understood from the following detailed description taken in conjunction with the accompanying drawings, in which:

[27] FIG.1 is a sectional view showing a conventional hoist wherein an intermediate shaft is mounted;

[28] FIG.2 is a plan view showing another conventional hoist;

[29] FIG.3 is a perspective view showing a hoist according to the present invention;

[30] FIG.4 is a front view showing the hoist of the present invention;

[31] FIG.5 is a left side view showing the hoist of the present invention;

[32] FIG.6 is a plan view showing the hoist of the present invention;

[33] FIG.7 is a bottom view showing the enlarged part of the hoist of the present invention;

[34] FIG.8 is a top view showing the decelerator of a driving part as a main part of the hoist of the present invention;

[35] FIG.9 is a sectional view showing the traveling part as a main part of the hoist of the present invention;

[36] FIG.10 is a side view showing the eccentric state of the traveling part of the hoist of the present invention; and

[37] FIG.11 is a perspective view showing another example of the traveling part of the hoist of the present invention wherein the traveling part is coupled by means of a hinge-coupling part. Best Mode for Carrying Out the Invention

[38] To accomplish the above objects, according to the present invention, there is provided a hoist that conducts traverse traveling in such a manner that a wire drum mounted at the upper portion of a main frame is adapted to wind or unwind a wire rope to convey an object taken by a hook coupled to a driving sheave, as a driving motor of a driving part is activated, the hoist including: the main frame having a coupling groove formed at a side wall of the main frame to be coupled with the driving part in such a manner as to face a coupling groove formed at a side wall of the driving part to be coupled with the main frame, a distance collar inserted into a space portion formed between the coupling groove at the main frame and the coupling groove at the driving part, and a fastening means inserted into each of the coupling grooves for coupling the main frame and the driving part; the driving part having a brake and a decelerator formed integrally with each other in a shape of a flange at the side portion of the main frame and having the driving motor formed at the inside of the main frame so as to be operated in cooperation with the brake and the decelerator, for driving the wire drum; a traveling driving part having a traveling motor formed at each of four corners of the lower portion of the main frame, the traveling motor connected to a decelerator at the inside thereof, and having a traveling shaft formed at one side of the traveling motor, the traveling shaft having a spline gear formed along the outer peripheral surface thereof at one side of the traveling motor; and a traveling part having a wheel having a coupling through-hole formed at the central portion thereof, the coupling through-hole having a spline gear groove formed along the inner peripheral surface of the coupling through-hole for inserting the traveling shaft of the traveling driving part thereinto, such that the spline gear of the traveling shaft is coupled so as to be operated in cooperation with the spline gear groove of the traveling part, having a bearing formed at the both sides of the wheel for securing the traveling shaft, having a casing formed for supporting the wheel, the casing having a space portion opened at the inside thereof for inserting the bearings thereinto, and having a plurality of fastening means formed at one side of the casing in such a manner as to be detachably mounted on the main frame.

[39] Preferably, according to the hoist of the present invention, a winding sheave may be mounted at the rear side of the wire drum so as to be operated in cooperation with the wire drum in a parallel relation with the driving sheave for winding the wire rope thereon, the driving sheave coupled with the hook catching the object, such that the winding sheave supports the driving sheave that is moved upwardly and downwardly by the rotation of the wire drum.

[40] Preferably, according to the hoist of the present invention, the driving part may have the brake and the decelerator which are integrally mounted to one side portion of the main frame by means of the fastening means, the decelerator comprising a casing having a plurality of gears and oil provided therein, an output shaft formed at one side of the casing coupled to the main frame in such a manner as to be coupled with the wire drum so as to be operated in cooperation with the gears in the casing, a motor shaft formed at the other side of the casing in such a manner as to be coupled to the driving motor for transmitting the power of the gears in the casing to the driving motor, a brake shaft formed on the outer surface of the casing in such a manner as to be coupled to the brake and operated in cooperation with the motor shaft, an air vent formed on the top surface of the casing for discharging the air therefrom, and an oil gauge and an oil drain formed on the front surface of the casing, for indicating a quantity of oil remaining in the casing and for draining the oil, respectively.

[41] Preferably, according to the hoist of the present invention, the space portion of the traveling part may have a bearing fixed along the outer peripheral surface of the traveling shaft in such a manner as to be inserted into the opened one side of the space portion, the wheel is inserted into the opened internal end of the space portion, and a sealing is formed at each of the coupling portions of the wheel with the end portions of the space portion for preventing the oil applied to the bearing from being leaked, such that the wheel is coupled to the opened portion of the space portion, with the bearing mounted to each of the both insides of the space portion.

[42] Preferably, according to the hoist of the present invention, the casing of the traveling part may be formed to eccentrically place the center of wheel coupled by means of the sealing to the end portion of the space portion and the center of the outer race of the bearing mounted in the inside of the space portion, such that the wheel is coupled within a predetermined eccentric range.

[43] Preferably, according to the hoist of the present invention, each of the plurality of fastening means of the traveling part may be provided with a fixing shaft that is fixedly coupled to the lower portion of the main frame and a fixing screw mounted at the both sides of the fixing shaft, such that the traveling part can be firmly fixed to the main frame, without any swing thereof.

[44] Preferably, according to the hoist of the present invention, the traveling part may be provided with a plurality of wheels that are formed at the lower side of the main frame by means of a hinge-coupling part, for smoothly conducting traverse traveling of the hoist according to the weight of the object. Mode for the Invention

[45] Now, an explanation on a preferred embodiment of the present invention will be in detail given with reference to attached drawings.

[46] As shown in FIGS.3 to 11, the hoist 100 of the present invention includes: a main frame 110 for supporting all parts of the hoist 100, the main frame 110 having a wire drum 111 for winding a wire rope thereon to thereby pull an object to be conveyed and a hook 113 operated in cooperation with the wire drum 111 for holding an object; a driving part 120 having a decelerator 122 and a brake 123 formed integrally with each other and mounted in a shape of a flange at one side portion of the main frame 110 and a driving motor 121 mounted at the inside thereof for controlling the speed of pulling the object; a traveling driving part 130 having a traveling motor 131 mounted at each of the four corners of the lower portion of the main frame 110, to thereby make the hoist 100 conduct traverse traveling; and a traveling part 140 having a wheel 143 connected to the traveling driving part 130 in such a manner as to be detachably mounted to each of the four corners of the lower portion of the main frame 110, for conducting traverse traveling.

[47] The main frame 110 is coupled with the driving part 120 in such a manner that a coupling groove 115 is formed on the portion to be coupled with the driving part 120 and after a distance collar 116 is inserted, the main frame 110 is then coupled with the driving part 120 through a fastening means 114.

[48] In this case, a winding sheave 117 is mounted at the rear side of the wire drum 111 and operated in cooperation with the wire drum 111 in such a manner as to be in a parallel relation with the driving sheave 112 for winding the wire rope thereon, the driving sheave 112 coupled with the hook 113 for catching the object, such that the winding sheave 117 supports the driving sheave 112 that is moved upwardly and downwardly by the rotation of the wire drum 111.

[49] The driving part 112 is configured such that the brake 123 and the decelerator 122 are formed integrally with each other in the shape of flange at one side portion of the main frame 110 and the driving motor 121 is formed at the inside of the main frame 110. As the driving motor 121 is rotated, thus, the wire drum 111 is driven.

[50] In this case, in the driving part 120, the brake 123 and the decelerator 122 as an integral body is coupled to one side portion of the main frame 110 by means of the fastening means 114. The decelerator 122 includes a casing 122a in which a plurality of gears are mounted and oil is stored, an output shaft 122b formed at one side of the casing 122a coupled to the main frame 110 in such a manner as to be coupled with the wire drum 111 and operated in cooperation with the gears in the casing 122a, a motor shaft 121a formed at the other side of the casing 122a in such a manner as to be coupled to the driving motor 121 for transmitting the power of the gears in the casing 122a to the driving motor 121, a brake shaft 123a formed on the outer surface of the casing 122a in such a manner as to be coupled to the brake 123 and operated in cooperation with the motor shaft 121a, an air vent 122c formed on the top surface of the casing 122a for discharging the air therefrom, and an oil gauge 122d and an oil drain 122e formed on the front surface of the casing 122a, the oil gauge 122d for indicating a quantity of oil remaining in the casing 122a and the oil drain 122e for draining the oil.

[51] The traveling driving part 130 is provided with the traveling motor 131 coupled with the decelerator 132 that is formed at each of the four corners of the lower portion of the main frame 110 and with a traveling shaft 133 with a spline gear 134 mounted along the outer peripheral surface thereof is formed at one side of the traveling motor 131.

[52] The traveling part 140 is provided with a spline gear groove 145 that is formed along the inner peripheral surface of a coupling through-hole 144 formed on the central portion of each wheel 143, such that the traveling shaft 133 of the traveling driving part 130 with the spline gear 132 mounted thereto is inserted into the coupling through- hole 144 with the spline gear groove 145 formed therein. Furthermore, the traveling part 140 is provided with a bearing 146 that is formed at the both sides of the wheel 143 for fixing the traveling shaft 133 thereto, a space portion 141 that is opened to the inside thereof for inserting the bearing 146 thereinto, a casing 141 that is formed at the outside thereof for supporting the wheel 143, and a plurality of fastening means 148 that are formed at one side of the casing 141 for detachably mounting the main frame 110 thereon. [53] In this case, the bearing 146 is inserted into the opened one side of the space portion

142 of the traveling part 140 and then fixed to the traveling shaft 133, and the wheel

143 is inserted into the opened internal end of the space portion 142. At this time, a sealing 147 is formed at the coupling portions of the wheel 143 with the end portions of the space portion 142, which prevents the oil applied to the bearing 146 from being leaked. Under the above configuration, the wheel 143 is coupled to the opened portion of the space portion 143, with the bearing 146 mounted to the both insides of the space portion 143.

[54] The traveling part 140 has the casing 141 formed to eccentrically place the center of wheel 143 coupled by means of the sealing 147 to the end portion of the space portion 142 and the center of the outer race of the bearing 146 mounted in the inside of the space portion 142. That is to say, the wheel 143 is coupled within a predetermined eccentric range.

[55] The eccentric range depends upon the size of the wheel 143, which is preferably between 4 mm and 8 mm.

[56] Each of the plurality of fastening means 148 of the traveling part 140 is provided with a fixing shaft 148 a that is fixedly coupled to the lower portion of the main frame 110 and a fixing screw 148b mounted at the both sides of the fixing shaft 148a, such that the traveling part 140 can be firmly fixed to the main frame 110, without any swing thereof.

[57] Moreover, the traveling part 140 can be provided with a plurality of wheels 143 at the lower side of the main frame 110 by means of a hinge-coupling part 149, which enables the hoist 100 having a relatively large capacity to conduct traverse traveling, without any trouble.

[58] Next, an explanation of the operation of the hoist 100 according to the present invention will be given.

[59] First, the main frame 110 is provided with the wire drum 111 in such a manner as to support the lower portion and both side portions thereof, and the driving part 120 is provided with the driving motor 121 that is formed at the inside of the main frame 110, having the decelerator 122 and the brake 121 as an integral body in the shape of flange mounted to one side portion of the main frame 110, the decelerator 122 and the brake 121 coupled to the main frame 110 in such a manner that the coupling groove 115 is formed on the portion to be coupled with the driving part 120 and after the distance collar 116 is inserted, the driving part 120 is coupled with the main frame 110 by the fastening means 114. And, the output shaft 122b of the decelerator 122 is coupled to the wire drum 111 for controlling the traveling speed of the wire drum 111, and the motor shaft 121 coupled to the driving motor 121 is fixed to the inner side of the main frame 110. [60] At this time, the decelerator 122 of the driving part 120 is formed such that the plurality of gears are coupled and rotated with the application of the oil therein, while controlling the speed of rotation according to the rotation ratio of the gears, and the decelerator 122 is provided with the air vent 122c that is formed on the top surface thereof, for removing the air generated in the interior thereof. The decelerator 122 is provided with the casing 122a that is formed of a single body having no sealed portion, having the front surface on which the oil gauge 122d for checking the quantity of oil stored therein and the oil drain 122e for discharging the oil when the oil is exchanged are formed. The casing 122a is provided at one side portion coupled with the main frame 110 with the output shaft 122b that is gear-coupled to the wire drum 111, provided at the other side portion coupled with the main frame 110 with the motor shaft 121a that is gear-coupled to the driving motor 121, and provided at the other side portion of the casing 122a with the brake shaft 123a that is gear-coupled to the brake 123, being operated in cooperation with the motor shaft 121a.

[61] As the wire drum 111 is rotated, the wire rope that is wound on the wire drum 111 is connected with the driving sheave 112 coupled to the hook 113 via the winding sheave 117 formed at the rear portion of the wire drum 111 in parallel relation with the driving sheave 112, such that as the wire rope is rotated, the object taken by the hook 113 can be moved upwardly and downwardly.

[62] The traveling driving part 130 is formed such that the traveling motor 131 coupled to the decelerator 132 is mounted to each of the four corners of the lower portion of the main frame 110, and the traveling shaft 133 with the spline gear 134 mounted along the outer periphery thereof is driven by the traveling motor 131 on one side of the traveling motor 131. Thus, the traveling driving part 130 is mounted at the casing 141 of the traveling part 140.

[63] In this state, the driving part 120 is mounted such that the decelerator 122 and the brake 123 formed integrally with each other in a single packaged shape are mounted at one side of the main frame 110 and operated in cooperation with the driving motor 121, and then, at the state where the hoist 100 on which the driving part 120 is mounted is delivered to the position to be installed, each wheel 143 having the coupling through-hole 144 with the spline gear groove 145 formed along the outer peripheral surface thereof formed on the central portion thereof is gear-coupled to the traveling shaft 133 of the traveling driving part 130. The bearing 146 is mounted in the space portion 142 opened at one side thereof in such a manner as to be supportingly inserted at the inside of the casing 141 into the traveling shaft 133, and the traveling part 140 that has the wheels 143 rotated as the traveling motor 131 of the traveling driving part 130 is driven is mounted by means of the fastening means 148 to each of the four corners at the lower portion of the main frame 110, to thereby be placed on the rails for conducting the traveling.

[64] At this time, the traveling part 140 is provided such that the casing 141 is formed to eccentrically place the center of wheel 143 coupled by means of the sealing 147 to the end portion of the space portion 142 and the center of the outer race of the bearing 146 mounted in the inside of the space portion 142. That is to say, the wheel 143 is coupled within a predetermined eccentric range, to thereby make it convenient to couple the wheel 143.

[65] Each of the plurality of fastening means 148 of the traveling part 140 is formed such that the fixing shaft 148a is fixedly coupled to the lower end portion of the main frame 110 and the fixing screw 148b is mounted at the both sides of the fixing shaft 148a, to thereby ensure fixing the traveling part 140 to the main frame 110, without any swing thereof.

[66] As mentioned above, all of the parts are moved separately to the place where the hoist is installed and just assembled with one another, to thereby greatly reduce the conveyance and installation costs.

[67] At this time, the traveling part 140 can be provided with the plurality of wheels 143 at the lower side of the main frame 110 by means of the hinge-coupling part 149, which enables the hoist 100 having a relatively large capacity to conduct the traverse traveling, without any trouble. Industrial Applicability

[68] As set forth in the foregoing, the hoist according to the present invention can connect a winding sheave formed at the lower portion of a wire drum to a driving sheave provided with a hook catching an object to be lifted in a parallel relation with each other, can be coupled with a decelerator and a brake that are formed integrally to each other in a shape of flange at one side portion of a main frame, and can detachably mount a traveling part to the lower portion of the main frame in a simple manner, such that each of the parts can be separately packaged, which makes the installation and separation of the parts substantially easy and greatly reduces the conveyance cost for the system.

[69] Further, the hoist according to the present invention can be provided with a brake and a decelerator that are formed integrally to each other in a shape of flange at one side portion of a main frame and can detachably mount a traveling part to the lower portion of the main frame in such a manner as to conduct traverse traveling by the rotation of wheels, such that each of the parts can be freely exchanged with one in accordance with the load and size of an object, which enhances the generality of the product and improves the power efficiency by connecting the parts in series.

[70] In addition, the hoist according to the present invention can be provided with a wheel that has a spline gear groove formed along the inner peripheral surface of a coupling through-hole formed in the central portion thereof, and with a traveling shaft that has an involute spline gear formed along the outer peripheral surface thereof, such that the traveling shaft is inserted into the wheel and gear-coupled with the wheel, which makes the assembling process easy and increases the rotation efficiency according to the coupling between the gears.

[71] Moreover, the hoist according to the present invention can be provided with a casing that is formed to have the wheel and the traveling shaft coupled by means of the involute spline gear formed along the outer peripheral surface of the traveling shaft at the inside thereof, and a space portion that is opened to insert a bearing thereinto and fixed to the main frame by means of a sealing, such that the installation space of the bearing is reduced and the bearing is fitted along the outer peripheral surface of the traveling shaft, which improves the assembling capability of the product.

[72] Moreover, the hoist according to the present invention can be configured such that oil is supplied to the inside of the space portion where the bearing is mounted for smoothly rotating the bearing, and a wheel is mounted to the opened side of the space portion and fixed by means of a sealing to the coupled portions with the space portion for preventing the oil stored in the inside of the space portion from being leaked, which reduces the number of parts and the installation space to thereby increase the installation efficiency.

[73] Furthermore, the hoist according to the present invention can be provided with a casing that is formed to eccentrically place the center of a wheel coupled by means of a sealing to the end portion of a space portion and the center of the outer race of a bearing mounted in the inside of the space portion, such that the wheel is coupled with the traveling part within a predetermined eccentric range, which makes the assembling work easy and reduces the production costs.

[74] Additionally, the hoist according to the present invention can be provided with a plurality of fastening means for coupling the traveling part with the main frame, each fastening means having a fixing shaft fixedly coupled to the lower end portion of the main frame and a fixing screw mounted at the both sides of the fixing shaft, such that the traveling part can be firmly fixed to the main frame, which allows the fixing to be rigid and prevents the traveling part from being swung, to thereby make the life period increased.

[75] Further, the hoist according to the present invention can be provided with a main frame that has a coupling groove formed at the portions to be coupled with a driving motor, a brake, a decelerator, and a traveling part, having a space portion upon coupling where a distance collar is inserted, and has a fastening means fastened into the coupling groove, such that only the coupling portion of each part is treated, without the processing for the entire portion of the parts to be coupled, which reducing the processing costs.

[76] Also, the hoist according to the present invention can be provided with a plurality of wheels that are coupled at the lower side of a main frame by means of a hinge-coupling part, such that a relatively heavy object can be conveyed by using the plurality of wheels, which enables the conveying efficiency to be greatly high.

[77] While the present invention has been described with reference to the particular illustrative embodiments, it is not to be restricted by the embodiments but only by the appended claims. It is to be appreciated that those skilled in the art can change or modify the embodiments without departing from the scope and spirit of the present invention.

Claims

[1] A hoist (100) conducting traverse traveling in such a manner that a wire drum

(111) mounted at the upper portion of a main frame (110) and having a wire rope wound thereon upwardly and downwardly conveys an object caught by a hook (113) coupled to a driving sheave (112), as a driving motor (121) of a driving part (120) is driven, the hoist (100) comprising: the main frame (110) having a coupling groove (115) formed at a side wall thereof to be coupled with the driving part in such a manner as to face a coupling groove formed at a side wall of the driving part (120) to be coupled with the main frame (110), a distance collar (116) inserted into a space portion formed between the coupling groove (115) at the main frame and the coupling groove at the driving part (120), and a fastening means (114) inserted into each of the coupling grooves for coupling the main frame (110) and the driving part (120); the driving part (120) having a brake (123) and a decelerator (122) formed integrally with each other in a shape of a flange at the side portion of the main frame (110), and having the driving motor (121) formed at the inside of the main frame (110) and operated in cooperation with the brake (123) and the decelerator (122), for driving the wire drum (111); a traveling driving part (130) having a traveling motor (131) formed at each of four corners of the lower portion of the main frame (110), the traveling motor (131) connected to a decelerator (132) at the inside thereof, and having a traveling shaft (133) formed at one side of the traveling motor (131), the traveling shaft (133) having a spline gear (134) formed along the outer peripheral surface thereof at one side with respect to the traveling motor (131); and a traveling part (140) provided with a wheel (143) having a coupling through- hole (144) formed at the central portion thereof, the coupling through-hole (144) having a spline gear groove (145) formed along the inner peripheral surface of the coupling through-hole (144) for inserting the traveling shaft (133) of the traveling driving part (130) thereinto such that the spline gear (134) of the traveling shaft (133) is coupled so as to be operated in cooperation with the spline gear groove (145) of the traveling part (140), with a bearing (146) formed at the both sides of the wheel (143) for securing the traveling shaft (133), with a casing (141) formed for supporting the wheel (143), the casing (141) having a space portion (142) opened at the inside thereof for inserting the bearings (146) thereinto, and with a plurality of fastening means (148) formed at one side of the casing (141) so as to be detachably mounted on the main frame (110).

[2] The hoist according to claim 1, wherein a winding sheave (117) is mounted at the rear side of the wire drum (111) and operated in cooperation with the wire drum

(111) in such a manner as to be in a parallel relation with the driving sheave

(112) for winding the wire rope thereon, the driving sheave (112) coupled with the hook (113) for catching the object, such that the winding sheave (117) supports the driving sheave (112) that is moved upwardly and downwardly by the rotation of the wire drum (111).

[3] The hoist according to claim 1, wherein the driving part (120) has the brake

(123) and the decelerator (122) which are integrally mounted to one side portion of the main frame (110) by means of the fastening means (114), the decelerator (122) comprising a casing (122a) having a plurality of gears and oil therein, an output shaft (122b) formed at one side of the casing (122a) coupled to the main frame (110) in such a manner as to be coupled with the wire drum (111) and operated in cooperation with the gears in the casing (122a), a motor shaft (121a) formed at the other side of the casing (122a) in such a manner as to be coupled to the driving motor (121) for transmitting the power of the gears in the casing (122a) to the driving motor (121), a brake shaft (123a) formed to the outer surface of the casing (122a) in such a manner as to be coupled to the brake (123) and operated in cooperation with the motor shaft (121a), an air vent (122c) formed on the top surface of the casing (122a) for discharging the air therefrom, and an oil gauge (122d) and an oil drain (122e) formed on the front surface of the casing (122a), for indicating a quantity of oil remaining in the casing (122a) and for draining the oil, respectively.

[4] The hoist according to claim 1, wherein the space portion (142) of the traveling part (140) has the bearing (146) fixed along the outer peripheral surface of the traveling shaft (133) in such a manner as to be inserted into the opened one side of the space portion (142), the wheel (143) is inserted into the opened internal end of the space portion (142), and a sealing (147) is formed at each of the coupling portions of the wheel (143) with the end portions of the space portion (142) for preventing the oil applied to the bearing (146) from being leaked, such that the wheel (143) is coupled to the opened portion of the space portion (143), with the bearing (146) mounted to each of the both insides of the space portion (143).

[5] The hoist according to claim 1, wherein the casing (141) of the traveling part

(140) is formed to eccentrically place the center of wheel (143) coupled by means of the sealing (147) to the end portion of the space portion (142) and the center of the outer race of the bearing (146) mounted in the inside of the space portion (142), such that the wheel (143) is coupled within a predetermined eccentric range. [6] The hoist according to claim 1, wherein each of the plurality of fastening means

(148) of the traveling part (140) is provided with a fixing shaft (148a) that is fixedly coupled to the lower end portion of the main frame (110) and a fixing screw (148b) mounted at the both sides of the fixing shaft (148a), such that the traveling part (140) can be firmly fixed to the main frame (110), without any swing thereof.

[7] The hoist according to claim 1, wherein the traveling part (140) is provided with a plurality of wheels (143) that are formed at the lower side of the main frame (110) by means of a hinge-coupling part (149), for smoothly conducting traverse traveling of the hoist according to the weight of the object.