Hoist having drum brake

专利摘要:
PURPOSE: A hoist having a drum brake is provided to quickly change the structure of the hoist by only replacing a wire rope drum. CONSTITUTION: In a hoist having a drum brake, a rotary body(12) is fixed to a motor shaft(11). A brake(13) is installed at the upper part of the rotary body, and stops the rotation of the rotary body. A speed reducer(29) is connected to the motor shaft, and reduces rpm of a motor. A wire rope(30) is wound/unwound around a wire rope drum(27) installed at a reduction gear(29a) by a shaft(31a). A control panel(32) is installed at one side of the wire rope drum, and controls the motor and the brake.
公开号:KR20040033381A
申请号:KR1020020062445
申请日:2002-10-14
公开日:2004-04-28
发明作者:조덕래
申请人:반도종공 주식회사；
IPC主号:

专利说明:

Hoist having Drum Brake
[17] The present invention relates to a hoist for lifting and transporting a heavy object such as a steel coil, and more specifically, lifting a heavy object suspended from a hook or lifting a heavy object suspended from a hook to a desired point of the wire rope drum. A hoist having a drum brake forcibly stopping rotation.
[18] In general, the hoist is provided with a motor 1 in a main body (not shown) that moves along a rail, and a shaft 2 that rotates according to the driving of the motor is a speed reducer for reducing the rotation speed of the motor 1 ( 3) and the final reduction gear and the fixed shaft (4) installed in the reduction gear is fixed to the wire rope drum (5).
[19] On the other hand, one side of the reducer (3) is provided with a brake (6) for forcibly stopping the rotation of the wire rope drum (5).
[20] Therefore, when the wire rope 7 wound around the wire rope drum 5 is long unrolled, the heavy material (not shown) is hung on the hook 8 and then the motor 1 is driven to reduce the rotation speed of the motor. By slowing down and slowly rotating the wire rope drum 5, the wire rope 7 which has been loosened is gradually wound on the wire rope drum 5, and accordingly, a heavy object suspended on the hook 8 rises.
[21] In this way, after the heavy object suspended on the hook 8 rises to a desired point, the control unit applies power to the brake 6, so that the pad 10 of the brake is a rotating body 9 fixed to the shaft 2. Since the side of the brake wheel is pressed, the rotation of the wire rope drum 5 is forcibly stopped and at the same time, the reverse rotation of the wire rope drum 5 is prevented between the movements of the heavy materials.
[22] When the motor, which is the driving source of the main body, is rotated in the state in which the wire rope drum 5 is prevented from being reversed by driving the brake 6, the main body moves along the rail, so that the heavy object suspended on the hook 8 is moved.
[23] After the heavy object suspended on the hook 8 is moved to a desired position, the driving of the motor, which is the driving source of the main body, is stopped and at the same time, the power is applied to the brake 6 to release the pressurized state of the pad pressing the rotating body. Since the motor 1 is driven, the wire rope 7 wound around the wire rope drum 5 is released, thereby carrying a heavy object suspended from the hook 8 to a desired position.
[24] However, the hoist having such a structure has several problems.
[25] First, if the height of lifting the heavy object, that is, the head lifts, the length of the wire rope drum should be made long. In this case, since the reducer and the brake are located on the opposite side of the motor, the shaft has to be made long, so the cost of the structural change is increased. In addition, the longer the shaft, the worse the safety.
[26] Second, because the shaft is long, the load is increased during the operation of the brake, the pad replacement time is shortened, as well as the number of parts, the pad replacement is cumbersome.
[27] Third, when a sudden power failure occurs while the heavy object is suspended on the hook, the pad automatically presses the rotating body. In this case, the pad cannot be released from the outside. There was a discontinuance.
[28] Fourth, since the wire rope drum is located between the motor and the reducer, the structure of the limit switch that restricts the top dead center of the hook to prevent the wire rope from being overwound to the wire rope drum becomes complicated.
[29] The present invention has been made to solve such a conventional problem, by installing a brake and a reducer operated by a solenoid between the motor and the wire rope drum to quickly change the structure without making a separate shaft even if the head of the heavy weight increases The purpose is to make it possible.
[30] Another object of the present invention is to release the pad pressure from the outside without disassembling the solenoid even if the pad pressurizes the rotating body due to sudden power failure in the state in which the weight is suspended on the hook to safely lower the weight suspended in the air to the ground .
[31] According to an aspect of the present invention for achieving the above object, a motor as a drive source, a wire rope drum to which the wire rope is wound in accordance with the driving of the motor, and a speed reducer for reducing the rotational speed of the motor and transmitting it to the wire rope drum; A hoist having a drum brake composed of a brake for preventing a reverse rotation of a wire rope by pressing a rotating body when the driving of the motor is stopped, the rotating body fixed to the motor shaft and installed above the rotating body. A brake which suppresses rotation of the rotating body when the power is turned off, a reducer installed on one side of the brake to reduce the rotational speed of the motor so that the rotating body is connected to a fixed motor shaft, and a shaft on the final reduction gear of the reducer. The wire rope drum is wound or unrolled and installed on one side of the wire rope drum to A hoist having a drum brake, characterized in that consisting of a control panel for controlling the same are provided.
[1] 1 is a configuration diagram showing a brake device of a conventional wire rope drum
[2] Figure 2 is a longitudinal cross-sectional view showing a configuration of the present invention
[3] 3A and 3B are cross-sectional views taken along a line A-A of FIG.
[4] 3A is a state in which the pad is connected to the outer peripheral surface of the rotating body
[5] 3B is a state in which the pad is spaced apart from the rotating body
[6] 4A and 4B are longitudinal cross-sectional views of a solenoid applied to the present invention.
[7] 4A is a state in which two plungers are in close proximity due to a sudden power failure
[8] Figure 4b is a state opening the plunger by inserting a rod into the hole formed in the housing
[9] * Description of the symbols for the main parts of the drawings *
[10] 11 motor shaft 12 rotating body
[11] 13: brake 17: lever
[12] 18: pad 19: electromagnet
[13] 20: plunger 22: solenoid
[14] 26: through hole 27: wire rope drum
[15] 29: reducer 30: wire rope
[16] 32: control panel
[32] Hereinafter, the present invention will be described in more detail with reference to FIGS. 2 to 4 as an embodiment.
[33] Figure 2 is a longitudinal cross-sectional view showing the configuration of the present invention, Figures 3a and 3b is a cross-sectional view taken along line A-A of Figure 2 and Figures 4a and 4b is a longitudinal cross-sectional view of a solenoid applied to the present invention, the present invention is a motor as a drive source The rotating body 12 is fixed to the shaft 11, and the brake 13 which suppresses rotation of a rotating body at the time of a power supply OFF is provided in the upper side of the said rotating body.
[34] The brake 13 includes a cover 14 installed to surround the rotating body 12, guide pins 15 fixed to both sides of the cover, and a lever 17 elastically installed on each guide pin by a spring 16. And a pad 18 fixed to one side of the lever and connected to the rotating body, and installed at an upper side of the cover to supply power to the electromagnet 19 while the plunger 20 compresses the spring 21. And a pin 23 fixed to one end of the lever, which is fixed to the solenoid 22 moving to and the plunger of the solenoid.
[35] At this time, the through hole 26 for inserting the rod 25 is formed in the upper center of the housing 24 constituting the solenoid 22.
[36] This is because the pad 18 presses the rotor 12 due to a sudden power failure in the state of lifting the heavy material, thereby stopping the rotation of the wire rope drum 27 without opening the through hole 26 without disassembling the brake 13. In order to be able to forcibly release the pressure of the pad 18 by inserting the rod 25 through.
[37] A reducer 29 is provided on one side of the motor shaft 11 to which the rotor 12 is fixed to reduce the rotation speed of the motor 28, and a wire rope 30 is provided at the final reducer gear 29a of the reducer. The wire rope drum 27 is wound or unrolled, and a shaft 31a is provided, and a control panel 32 for controlling the driving of the motor 28 and the brake 13 is provided at one side of the wire rope drum.
[38] In this way, when the shaft 31b fixed to one end of the wire rope drum 27 is exposed to the control panel 32, a limit switch (not shown) for controlling the top dead center and the bottom dead center for lifting heavy materials is external. This has the advantage that it can be easily installed in the vicinity of the exposed shaft 31b.
[39] Referring to the operation of the present invention configured as described above is as follows.
[40] First, in a state where power is not applied, as shown in FIG. 3A, the plunger 20 is close to each other by the restoring force of the spring 21, so that the lever 17 is retracted inward by the restoring force of the spring 16. The pad 18 fixed to one side of the pad 18 is closely connected to the outer circumferential surface of the rotating body 12, so that the wire rope drum 27 on which the wire rope 30 is wound does not rotate in reverse.
[41] In this state, when the heavy object is suspended on the hook 8 fixed to the end of the wire rope 30 and the power is applied to the control panel 32, the brake 13 operates first before the motor 28, which is the driving source, is driven. All restraints shall be released.
[42] That is, when power is applied to the electromagnet 19 of the solenoid 22, the plunger 20, which is close to each other by the restoring force of the spring 21, compresses the spring 21 by the magnetic force of the electromagnet, as shown in FIG. 3B. Since the lever 17 is fixed to the upper end of the lever by the pin 23 is opened to the outside while compressing the spring 16, the pad 18 is intimately connected to the rotating body 12 Is spaced apart from the rotor.
[43] At the same time, when power is applied to the motor 28 as a driving source and the motor shaft 11 is rotated, the shaft fixed to one end of the wire rope drum 27 with the rotational force of the motor reduced by the reduction gear in the reduction gear 29. Since the wire rope drum 27 is rotated to 31a, the wire rope 30, which has been released from the wire rope drum, is wound.
[44] As such, when the wire rope 30 released from the wire rope drum 27 is wound on the wire rope drum 27, the weight hanging on the hook 8 rises, and the top dead center where the weight is raised is the wire rope drum ( 27 can be easily controlled by a limit switch provided on the outer circumferential surface of the shaft 31b fixed to one end.
[45] When the limit switch detects the rising of the heavy weight and the driving of the motor 28 is stopped, the power applied to the solenoid 22 is automatically turned off and the magnetic force of the electromagnet 19 is lost. While plunging (21), the plungers 20, which have been opened to both sides, are quickly moved inward to each other by the restoring force of the spring 21.
[46] Thus, when the plunger 20 moves inward at the same time, the lever 17 which is opened while compressing another spring 16 is also fixed to one end of the lever 17 while being retracted inward by the restoring force of the spring 16. Since the pad 18 is closely connected to the rotating body 12, the reverse rotation of the wire rope drum 27 is prevented in the state in which the heavy object is suspended on the hook 8.
[47] On the other hand, if a heavy object is suspended in the air due to a sudden power failure in the state of lifting the heavy object suspended on the hook (8) to release the restraint state of the brake for safety, the heavy object should be safely lowered to the ground, in the present invention, the brake 13 is dismantled The pad 18 can be spaced apart from the rotating body 12 without having to.
[48] That is, as shown in FIG. 4A, the plunger 20 is retracted inwardly due to a sudden power failure, and the plunger 20 is forcibly opened while the pad 18 is closely connected to the rotor 12. When the pad 18 is to be spaced apart, the rod 25 is inserted through the through hole 26 formed in the upper center of the housing 24 and the rod 25 is pulled to one side to close the plunger 20. While compressing the spring 21 is opened as shown in Figure 4b, the pad 18 connected to the rotating body 12 is spaced apart from the rotating body to manually rotate the wire rope drum 27 to hang in the air The old weight can be safely lowered to the ground.
[49] After the heavy object is lowered to the ground by the operation as described above, the plunger 20 is returned to the restoring force of the spring 21 by removing the force from the rod 25 that was pushed into the through hole 26 and then the through hole 26. When the rod 25 is taken out of the rod 25, the lever 17 is rotated by the restoring force of the spring 16, and the pad 18 presses the rotating body 12 again. It will be able to carry heavy objects.
[50] As described above, the present invention has the following advantages over the conventional hoist.
[51] First, a brake to prevent reverse rotation of the wire rope drum and a speed reducer to reduce the number of revolutions of the motor are installed on one side of the motor, so that even if the lifting head for lifting heavy objects increases, the wire rope drum can be manufactured without lengthening the shaft that transmits power. Because only the replacement is required, the structure can be changed quickly at low cost.
[52] Second, even if the pad presses the rotor due to sudden power failure while lifting the heavy object, the pad can be inserted through the through hole formed in the housing to disassemble the pad from the rotor without disassembling the brake. It becomes possible.
[53] Third, since one axis of the wire rope drum is exposed to the control panel side, it becomes easy to install a limit switch that controls the top dead center and the bottom dead center of the heavy material.

权利要求:
Claims (3)
[1" claim-type="Currently amended] A motor that is a driving source, a wire rope drum in which a wire rope is wound according to the driving of the motor, a reducer for reducing the rotational speed of the motor and transferring the wire rope to a wire rope drum, and a pad that rotates the rotor when the motor is stopped A hoist having a drum brake configured to pressurize a wire rope to prevent reverse rotation of a wire rope, the hoist having a rotating body fixed to a motor shaft and a brake provided above the rotating body to suppress rotation of the rotating body when the power is turned off. And a reducer installed on one side of the brake to reduce the rotational speed of the motor so that the rotating body is connected to the fixed motor shaft, and a wire rope drum installed on the final reduction gear of the reducer to wind or unwind the wire rope. And a control panel installed at one side of the wire rope drum to control driving of the motor and the brake. Hoist having a drum brake.
[2" claim-type="Currently amended] The method of claim 1,
The brake includes a cover installed to surround the rotating body, guide pins fixed to both sides of the cover, a lever elastically installed on each guide pin by a spring, a pad fixed to one side of the lever and connected to the rotating body, and Installed on the upper side of the cover, the power supply is applied to the electromagnet, the plunger has a drum brake, characterized in that consisting of a pin fixed to one end of the lever fixed to the plunger of the solenoid to move to one side while compressing the spring Hoist.
[3" claim-type="Currently amended] The method of claim 2,
The hoist having a drum brake, characterized in that the through-hole is formed in the upper center of the housing constituting the solenoid.

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同族专利:

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公开号 | 公开日

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KR100497030B1|2005-06-28|

引用文献:

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公开号 | 申请日 | 公开日 | 申请人 | 专利标题

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法律状态:
2002-10-14|Application filed by 반도종공 주식회사

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2002-10-14|Priority to KR10-2002-0062445A

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2004-04-28|Publication of KR20040033381A

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2005-06-28|Application granted

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2005-06-28|Publication of KR100497030B1

优先权:

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申请号 | 申请日 | 专利标题

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KR10-2002-0062445A|KR100497030B1|2002-10-14|2002-10-14|Hoist having Drum Brake|