JP4523292B2 - Power unit for hoisting traction machine - Google Patents

Description

  The present invention relates to a power unit mounted on a hoisting tractor such as a manual chain block.

  Conventionally, manual chain blocks have been frequently used for lifting and lowering heavy objects. This manual chain block includes a chain block main body, an upper hook provided at the upper end of the chain block main body, a load chain hung on a load sheave of the chain block main body, a lower hook provided at the lower end of the load chain, It is composed of hand chains that are juxtaposed to the chain block body and hung on the hand wheel. Pull the hand chain, turn the hand wheel, wind up or down the load chain, and lift the heavy load suspended on the lower hook. Is.

  However, the above-described conventional device requires a large amount of human power at the time of a heavy load operation such as when lifting and lowering a heavy object, and when lifting and lowering a heavy object with a long head, it takes a long time, It is difficult for one person to work continuously, and on the other hand, it may be necessary to perform high-speed operation when there is no load.

Therefore, as a means for reducing the load on the operator, a power coupling portion is provided in a rotating body that rotates the load sheave of the hoisting traction machine, and the power of the electric driver is coupled to the power coupling portion. Has proposed to drive a hoisting traction machine. (Patent Document 1)
Japanese Patent No. 3355484 (page 5 Fig. 1)

  However, the hoisting machine described in the above-mentioned patent document is only for coupling the electric screwdriver to the driving unit of the hoisting machine when the electric screwdriver is attached to the hoisting machine. Since the means for attaching the to the hoisting machine is not necessarily strong, there is a concern that the electric driver may come off the hoisting machine. For this reason, the operator must lift the electric screwdriver during the work, and the operator's burden is heavy, and it is difficult to perform other operations outside the hoisting work for lifting the driver. There was a problem that it was not possible.

  In addition, since the motor extends in the direction of the output axis of the chain block, when the motor is engaged with the chain block, the dead space in the axial direction increases due to the length of the motor, and work in a narrow space In addition, during continuous winding operation of the chain block by the electric screwdriver, there are problems that the brake performance of the chain block is reduced and the life of the brake material is reduced.

  In the power device mounted on the hoisting tow machine, the present invention reduces the burden on the operator by providing a locking means having a fall prevention function as an engaging means for the hoisting towing machine and the power device. Furthermore, the present invention provides a power unit for a hoisting tractor that can prevent overheating of a brake unit of the hoisting tractor during the installation work of the power unit and that can be fixed to the hoisting tractor simply and reliably. is there.

The present invention provides a power device for a hoisting traction machine including a load sheave around which a load chain is wound, a drive member that rotates the load sheave, and a power unit that is coupled to the drive member so that power can be transmitted. The power device includes an air motor as power means, and an air supply unit having an air discharge unit for discharging air to the hoisting tractor body and cooling a brake unit of the hoisting traction machine. Features.

Further, on the air supply path of the e Ah discharge portion, characterized in that a oil separating means for separating the oil that is mixed with air, further, the air supply unit is a power means supported box, the bottom Oil that has an air motor vertically installed, has power transmission means, covers the cooling air that supplies air to the air discharge part, covers the oil separation means, and collects oil separated from the cooling air A power unit for a hoisting traction machine characterized by comprising an accumulation part, and the oil separation means is a filter provided at an end of an air motor, and discharges cooling air from the filter. Furthermore, the cooling air supplied from the discharge part of the air motor to the power means support box is sub-exhaust air branched from the main exhaust air of the air motor. Characterized in that there.

  According to the present invention, the power device includes a power transmission means having an output shaft that engages with a power input shaft of the hoisting tractor, a power means that is suspended in a direction perpendicular to the output shaft, and The power transmission means and the locking means for engaging and fixing the power means to the hoisting machine main body are provided, and the operator does not need to lift and hold the power unit during the operation of the hoisting traction machine. The burden can be reduced, and the hoisting operation can be performed safely by one person. Furthermore, by providing the power means in the direction orthogonal to the output shaft, the dead dimension in the axial direction can be reduced, and work in a narrow space is possible. Can be made possible. Furthermore, the power unit can be firmly engaged with the hoisting and pulling machine main body by using the locking unit as the locking unit provided in the upper part of the power transmission unit and the regulating unit provided in the lower part. Furthermore, the power unit is equipped with an air motor as a power means and an air supply unit having an air discharge unit for discharging cooling air discharged from the air motor to the hoisting tractor body and cooling the brake unit. As a result, the heating of the brake part of the hoisting and pulling machine can be suppressed, and the brake performance can be prevented from deteriorating.

  In addition, since a filter is provided in the air discharge part of the air motor, even when oil mixed air for air motor lubrication is supplied, the oil component is removed from the air supplied to the brake part. It is possible to prevent the performance of the brake part from being deteriorated by oil. In addition, air is accumulated in the power means support box, and an air motor is suspended in the lower part of the box and a power transmission means is provided, and cooling air discharged from the discharge portion of the air motor is covered with a lid. Since the space and the oil accumulation part are provided, the oil removed from the cooling air accumulates in the frame, so that workers can work and operate comfortably without touching the oil, and the oil accumulation. Since the space for use is provided in the empty space of the power means support box, it is not necessary to newly provide an accumulation space, and a power device having a simple structure can be provided.

  In addition, the air discharged from the discharge part of the air motor to the power means support box is sub-exhaust air branched from the main exhaust air of the air motor, so when all exhaust air is supplied to the hoisting tractor, The efficiency decreases, the output torque of the air motor becomes unstable, and the resistance of the handwheel of the hoisting tractor is driven, and the driving force cannot be transmitted efficiently from the air motor. By doing so, it is possible to always discharge moderate air without affecting the driving torque of the air motor, and it is possible to perform stable power transmission without causing insufficient torque of the air motor.

  Embodiments of the present invention will be described below with reference to FIGS. FIG. 1 is an enlarged front view showing a hoisting tractor equipped with a power unit, FIG. 2 is a side view of the side of the power unit of FIG. 1, and FIG. 3 is the power unit of the hoisting tractor of the present invention removed. FIG. 4 is an enlarged front view showing the power unit, FIG. 5 is a side view of the connecting box side of FIG. 3, and FIG. 6 is a side view taken along line AA of FIG. In the figure, reference numeral 1 denotes a chain block body, which fixes a load sheave 2, a drive shaft 3 that drives the load sheave 2, a pair of body frames 4 that support the load sheave 2 and the drive shaft 3, and a body frame 4 that is driven at its tip. A fixing bolt 5 penetrating the cover 13 of the device 9, a load chain 6 wound around the load sheave 2, an upper hook 7 provided at the upper end of the chain block body, and a lower hook 8 provided at the lower end of the load chain 6 I have. A drive device 9 drives the drive shaft 3 and is provided on one side of the main body frame 4 of the chain block main body 1. The drive device 9 includes a hand wheel 10 that is a drive member screwed to the end of the drive shaft 3, a mechanical brake 11 that transmits the rotation of the hand wheel 10 to the drive shaft 3 and prevents the suspended load from dropping, A hand chain 12 wound around the handwheel 10 is provided, and the entire driving device 9 is covered with a cover 13 having an opening having an inner diameter slightly larger than the outer diameter of the transmission plate 16 so that the transmission plate 16 can be inserted. ing. The handwheel 10 includes a wheel groove 10a for winding and holding the hand chain 12, a circular brake surface 10b that contacts the brake plate 11a, and a brake surface outer diameter portion that forms the wheel groove and the brake surface 10b. A fitting hole 10c penetrating the handwheel 10 is provided between the driving shaft 10d and 10d. Reference numeral 14 denotes a power coupling device, which has a transmission plate 16 having a fixed length transmission shaft 15 fitted in a fitting hole 10c provided in the handwheel 10, and a transmission plate 16 and a speed increasing gear 19a that are spline-coupled to each other at the tip. The first input shaft 18 having the power source fitting portion 17, the first input shaft 18 and the speed increasing gear 19b are connected to each other, and the speed increasing gear 19b is spline-coupled, and the power source fitting portion 20 is provided at the tip. The first input shaft 18, the second input shaft 21, and the speed increasing gears 19a and 19b are provided in a connection box 22 formed by a pair of frames 22a and 22b. Reference numeral 22c denotes a rib protruding from the frame 22b toward the power unit. The connection box 22 is detachable from the chain block body 1 by screwing a connection nut 23 fitted in the connection box 22 to the front end of the fixing bolt 5 whose front end passes through the cover 13 of the drive device 9. Installed. Reference numeral 24 denotes a positioning member provided between the cover 13 and the frame 22 a of the connection box 22, and has a length in contact with the outer end surface of the cover 13 so as to ensure that the connection box 22 is fixed by the connection nut 23. 26 is fixed to the frame 22b of the connection box 22 and has an end for exhausting air in opposition to an air supply hole 10e provided in the handwheel 10 to be described later, and an air exhaust hole 35 of the power means support box 34 This is a cooling nozzle in communication. Reference numeral 27 denotes a connected portion that fits into an exhaust hole 35 provided in the power means support box 34, which will be described later, and 28 denotes a substantially U-shaped engagement protruding from the frame 22b toward the power means support box 34 as shown in FIG. Frame, 29 is a locking shaft pivotally supported by the locking frame 28, 30 is a stopper rotatably supported by a hinge shaft pivotally supported by the locking frame 28, 30a is an engaging portion, 31 is a hinge shaft, Reference numeral 32 denotes an urging spring having one end locked to the stopper 30 and the other end locked to the locking frame 28 to urge the stopper 30 clockwise. 33 is an air motor as power means, 33a is a power shaft, 33b is a drive gear, 33c is a driven gear, 33d is a transmission shaft, and 33e is fitted to the first input shaft 18 or the second input shaft 21 provided in the connection box 22. It is the power transmission part which unites. The air motor 33, the power shaft 33a, the drive gear 33b, the driven gear 33c, the transmission shaft 33d, and the power transmission portion 33e constitute power means. The air motor 33 is mounted on the power means support box 34 in such a manner that the upper part protrudes into the box from the lower part of the power means support box 34, and a filter 38 for oil separation is provided at the entry part. The bottom part of the power means support box 34 is an oil accumulation part, in which oil separated from the filter 38 is stored.

  34 is a power means support box for supporting the air motor 33 which is a power source. The sub exhaust air branched from the main exhaust air of the air motor 33 is supplied from the air motor 33 through the filter 38, and is covered and covered. An air exhaust hole 35 is provided as a connection portion that is coupled to a connected portion 27 that communicates with a nozzle 26 provided in a connection box 22 attached to the traction machine main body. The support box 34 includes a sealed space 34 a and is filled with cooling air from the air motor 33 through the filter 38. 34b is an oil discharge hole, and 34c is a set screw. 36a is a forward air supply hose for supplying air to the air motor 33, 36b is a reverse air supply hose, 37 is an exhaust hose from which the remaining exhaust air of the sub exhaust air is exhausted from the air motor 33, and 33e is an air motor. 33 is a power transmission portion that transmits power to the transmission plate 16 via the power shaft 33a, the drive gear 33b, and the driven gear 33c, and is fitted to the power source fitting portions 17 and 20 of the transmission plate 16, so that the transmission plate 16 To transmit power.

  The air motor 33 includes fins that are rotated by compressed air. The air motor 33 according to the present embodiment includes two air supply hoses 36a and 36b that rotate the fins in forward and reverse directions, and the above-described fins to the air. An air exhaust hose 37 for exhausting air is provided, and the fins are rotated in the forward and reverse directions by switching the air supply hose.

  The drive gear 33b and the driven gear 33c are bevel gear mechanisms. 39 is an auxiliary bracket provided below the transmission shaft 33d of the power means support box 34, bent in an L shape, and has a buffer member 39a on the bent end surface. The auxiliary bracket 39 protrudes from the end surface of the connection box 22. This is a rotation restricting member that fits into a concave portion provided in the restricting member 22d. Reference numeral 40 denotes a bearing portion that is provided on the power source support frame 34 and supports the power transmission portion 33e. The air motor 33, the power means support box 34, the power shaft 33a, the drive gear 33b, the driven gear 33c, the transmission shaft 33d, the power transmission shaft 33e, and the air exhaust hole 35 constitute a power device. The air supply hole 10e is provided on the outer side in the circumferential direction of the brake surface 10b provided inside the handwheel 10, for example, on the same arc as the fitting hole 10c into which the transmission shaft 15 is fitted as shown in FIG. . The cooling nozzle 26 is fixed to the frame 22b of the connection box 22, and the protruding portion 27 protruding from the frame 22b to the power means side is connected to an air exhaust hole 35 provided in the power means support box. It is. As described above, in the power means support box 34, the air motor 33 is mounted on the lower portion in a direction orthogonal to the transmission shaft 33d, that is, in the vertical direction, and the power shaft 33a for driving the power of the air motor 33 is driven. A hollow box having a gear 33b, a driven gear 33c, a transmission shaft 33d, and an air exhaust hole 35 fitted to the connected portion 27 of the nozzle 26. A filter is provided from the air motor 33 to the space 34a of the hollow portion. Cooling air is supplied through The cooling air supplied into the power means support box 34 cools the handwheel 10 from the air exhaust hole 35 through the nozzle 26, and the brake surface is cooled.

  Next, reference numeral 41 denotes a support frame installed on the upper portion of the power means support box 34, and a locking hook 43 is rotatably provided on the support frame 41 via a hinge shaft 42. The locking hook 43 includes a protruding stopper locking portion 44 that locks the stopper 30 at the upper end on the hoisting machine side, and a locking shaft engaging portion that engages with the locking shaft 29 at the lower end. The locking hook 43 fits the power transmission portion 33e of the transmission shaft 33d to the power means fitting portion 17 of the input shaft, and fits the air exhaust hole 35 to the connected portion 27 of the nozzle 26 to support the power means. After the box 34 is mounted on the connection box 22, the box 34 is rotated from the dotted line state of FIG. 1, the locking shaft engaging portion 45 is engaged with the locking shaft 29, and the power means support box 34 is viewed from the connection box 22. Lock and fix to. As shown in the drawing, the locking hook 43 has a guide portion 43 a that is inclined from the upper portion to the lower portion, so that the guide portion 43 a moves the stopper 30 against the biasing spring 32 when the locking hook 43 rotates. Thus, the locking hook 43 is locked to the locking shaft 29. When the locking hook 43 is locked to the locking shaft, the stopper 30 is rotated clockwise by the biasing spring 32, and the locking portion 30a of the stopper 30 is engaged with the stopper engaging portion 44 of the locking hook 43. The locking hook 43 is locked to the locking shaft 29.

  Further, the buffer member 39a of the auxiliary bracket 39 is fitted into a concave portion provided in the restricting member 22d protruding from the end surface of the frame 22b of the connection box 22, and the power means support box 34 is rotated clockwise in FIG. In FIG. 2, the left and right turn is restricted.

The attachment and operation of the power source apparatus of this embodiment to the hoisting tractor body will be described.

  The power means supporting box 34 of the power means device is moved closer to the connection box 22 side, and the power means transmitting portion 33e is fitted to the power source fitting portion 17 or 20 of the input shaft 18 or 21, and at the same time, the power means supporting box 34 is connected. The air exhaust hole 35 is fitted to the connected portion 27 of the nozzle 26, the locking hook 43 provided on the upper portion of the support box 34 is rotated, and the locking shaft 29 provided on the connection box 22 is engaged. The locking hook 43 is locked by the stopper 30, and the auxiliary bracket 39 is fitted into the regulating member 22 d of the connection box 22, and the power means device is fixedly fixed to the connection box 22.

  Next, when the air motor 33 is driven forward or backward by compressed air supplied from the air supply hose 36a or 36b, the first input is made via the power shaft 33a, the drive shaft 33b, the driven gear 33c, and the power transmission portion 33e. The shaft 18 or the second input shaft 21 is rotated, and the handwheel 10 is rotated by the transmission plate 16. On the other hand, the exhaust air exhausted from the air motor 26 is branched into main exhaust air and sub exhaust air, and the sub exhaust air is supplied to the space 34 a of the power means support box 34 via the filter 38, and the air exhaust hole 35. From the nozzle 26 toward the air supply hole 10e of the handwheel 10 and discharged to the outer surface of the handwheel 10, and the air discharged from the air supply hole 10e causes the brake surface 10 of the handwheel 10 to be discharged. To be cooled.

  Next, the lifting and lowering operation of the hoisting machine using the power unit of the above-described embodiment will be described. When the load is lifted and lowered by the chain block, the power transmission portion 33e of the air motor 33 is fitted and attached to the power source fitting portion 17 of the first input shaft 18, and the power device is attached to the connecting device 14. When the air motor 33 is driven, the first input shaft 18 is rotated, the transmission plate 16 that is splined with the first input shaft 18 is rotated, and the handwheel 10 is rotated via the transmission shaft 15. The drive shaft 3 and the load sheave 2 are rotated via the mechanical brake 11 to raise and lower the load.

  On the other hand, when unloading the load, when the handwheel 10 is rotated in the direction opposite to the clockwise direction, the handwheel 10 moves backward on the drive shaft 3 in the right direction in FIG. 1, so that the brake surface 10b and the brake plate 11a. Then, the tightening of the mechanical brake 11 of the ratchet wheel and the brake receiver is released, the drive shaft 3 rotates in the lowering direction via the load sheave 2 and the speed reducer due to the load, and the handwheel 10 is moved to the left in FIG. Pulling in the direction, a tightening force is generated again by this operation, and the descent of the load is stopped. By this repeated operation, the winding is performed.

  As described above, according to the present invention, the power transmission portion 33e provided in the power means support box 34 is fitted into the power means fitting portion 17 provided in the connection box 22, and the air exhaust hole 35 of the power means support box 34 is formed in the nozzle. 26 is engaged with the base end portion of the connected portion 27, the engagement hook 43 is engaged with the engagement shaft 29, and the auxiliary bracket 39 is engaged with a regulating member provided in the connection box 22b. The means support box 34 is securely attached to the connection box 22.

  When the air motor 33 is driven by compressed air supplied from the air supply hoses 36a and 36b, the input shaft 18 or 21 is rotated via the power shaft 33a, the drive shaft 33b, the driven gear 33c, and the power source transmission unit 33e. The handwheel 10 is rotated by the transmission plate 16. Exhaust air from the air motor 33 is discharged from the nozzle 26 toward the air supply hole 10e of the handwheel 10 through the air discharge hole 35 to the outer surface of the handwheel 10 and discharged from the air supply hole 10e. Thus, the brake surface 10 of the handwheel 10 is cooled.

  Further, as described above, when the air motor 33 is rotated, the power source fitting portion 17 or 20 is rotated via the drive gear 33b, the driven gear 33c, and the power transmission portion 33e, and the transmission plate 16 and the handwheel 10 are allowed to rotate. The load sheave 2 is rotated.

  Further, as shown in the figure, a bevel gear mechanism is adopted for the drive gear 33b and the driven gear 33c so as to change the power transmission direction by 90 degrees, so that the power means 33 is viewed below the support frame 34 and the drive gear 33b Since it can be provided below and the dead space in the axial direction of the power unit can be reduced, it can be operated even in a narrow place.

  According to the present invention, since the operator does not need to lift and hold the power unit during the operation of the hoisting machine, the burden on the operator is reduced, and the hoisting operation can be performed safely by one person. By providing the power means in the direction orthogonal to the output shaft, the axial dimension can be reduced, work in a narrow space can be performed, and the locking means is provided above the power transmission means. By using the locking means and the regulating means provided at the lower part, the power unit can be firmly engaged with the hoisting and pulling machine main body. Further, the power unit includes an air motor that is a power unit, and an air Cooling air discharged from the motor is discharged to the hoisting tractor body, and by providing an air supply part with an air discharge part for cooling the brake part, the heating of the brake part of the hoisting traction machine is suppressed, Low brake performance It is possible to prevent, is useful as a power device for hoisting and pulling device.

The front view which shows the winding traction machine provided with the power unit of this invention. The side view by the side of the power unit of FIG. The front view of the winding traction machine which shows the state which removed the power unit of FIG. The front view which shows a power unit. The side view by the side of the power unit of FIG. The AA view side view of FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Chain block main body 2 Load sheave 3 Drive shaft 4 Support frame 5 Stay bolt 6 Load chain 7 Upper hook 8 Lower hook 9 Drive device 10 Hand wheel 10a Wheel groove 10b Brake surface 10c Fitting hole 10d Brake surface outer diameter part 10e Air supply Hole 11 Mechanical brake 12 Hand chain 13 Cover 14 Connecting device 15 Transmission shaft 16 Transmission plate 17 Power source fitting portion 18 First input shaft 19a, 19b Speed increasing gear 20 Power source fitting portion 21 Second input shaft 22 Connection box 22a Frame 22b Frame 22c Rib 22d Restriction member 23 Connecting nut 24 Positioning member 26 Nozzle 27 Connected portion 28 Locking frame 29 Locking shaft 30 Stopper 30a Engaging portion 31 Hinge shaft 32 Energizing spring 33 Air motor 33a Movement Force shaft 33b Drive gear 33c Drive gear 33d Transmission shaft 33e Power transmission portion 34 Power means support box 34a Air gap 34b Oil discharge hole 34c Set screw 35 Air discharge hole 36a Forward rotation air supply hose 33b Reverse rotation air supply hose 37 Air exhaust hose 38 Filter 39 Auxiliary bracket 39a Buffer member 40 Bearing portion 41 Support frame 42 Hinge shaft 43 Locking hook 43a Guide portion 44 Stopper engaging portion 45 Locking shaft engaging portion

Claims (5)

In a hoisting traction power unit comprising a load sheave around which a load chain is wound, a drive member that rotates the load sheave, and a power unit that is coupled to the drive member so that power can be transmitted, the power unit is A winding device comprising: an air motor as a power means; and an air supply unit having an air discharge unit for discharging air to the hoisting and pulling machine body and cooling a brake unit of the hoisting and drawing machine . Power unit for upper traction machine. The power device for a hoisting traction machine according to claim 1, wherein an oil separation means for separating oil mixed in the air is provided on an air supply path of the air discharge portion . The air supply unit is a power means support box, an air motor is vertically suspended at the lower part, a power transmission means is provided therein, and a space part for covering the cooling air for supplying air to the air discharge part, and the oil separation The power unit for a hoisting traction machine according to claim 2, further comprising: means and an oil accumulating unit for accumulating oil separated from the cooling air . The power device for a hoisting traction machine according to claim 3, wherein the oil separation means is a filter provided at an end of an air motor, and discharges cooling air from the filter . 5. The winding according to claim 3, wherein the cooling air supplied to the power means support box from the discharge portion of the air motor is sub-exhaust air branched from the main exhaust air of the air motor . Power unit for upper traction machine.

Images