JP2645638B2 - Electric hoisting / traction device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electric hoisting and traction device,
More specifically, a motor having a drive shaft and a load sheave driven in conjunction with the motor are provided, and the load is driven by the motor to load and unload goods. The present invention relates to an electric hoisting and traction device for performing a traction operation.

[0002]

2. Description of the Related Art Conventionally, as described above, an electric hoisting and towing device in which a load sheave is driven and rotated by driving a motor to carry out a hoisting / unloading or towing operation is provided. −
An electromagnetic brake is provided to operate when the input to the motor is cut off and to reduce the inertial rotation of the load sheave.

That is, as shown in, for example, Japanese Utility Model Application Laid-Open No. Sho 61-52695, an electromagnetic brake is provided on the side of the motor opposite to the load sheave,
As shown in Japanese Patent No. 3993, a first gear side of a driven shaft interlocking with a motor shaft of the motor, that is, a first gear formed integrally with the drive shaft to constitute a reduction gear mechanism. The gear is extended, and an electromagnetic brake is provided on the extension shaft.

[0004]

As described above, when the electromagnetic brake is provided on the side opposite to the load sheave of the motor, not only does the motor have an increased weight, but also the motor becomes heavy. The weight of the electromagnetic brake is added to the weight of the motor, so that the center between the side plates that rotatably support the load sheave, in other words, the weight of the motor side with respect to the axial center of the load sheave, and deceleration. The weight balance with the weight on the gear side where the gear mechanism is provided is lost, and there is a problem that the motor side tilts downward and the operation of the motor and the electromagnetic brake is controlled. Since the control panel is usually provided on the gear side, that is, outside the gear case that covers the reduction gear mechanism, a lead wire for controlling the operation of the electromagnetic brake is provided in a motor case that houses the motor. From side After passing through the gear case through the over door,
There is a problem that the lead wire needs to be led to the control panel and the lead wire lead-out structure becomes complicated.

On the other hand, when the electromagnetic brake is provided on the extension shaft portion of the first gear, there is no such a problem that the weight balance is broken or a problem that the lead wire drawing-out structure is complicated. The brake takes up a large area as shown in FIG. 1 of Japanese Utility Model Laid-Open Publication No. Sho 61-193993, and is arranged in an electrical box in which a control panel is installed. Therefore, there is a problem that the layout of electrical components in the electrical box is hindered, and the electromagnetic brake generates abrasion powder during braking, and the abrasion powder scatters in the electrical box. It is necessary to provide a cover over the entire electromagnetic brake in order to avoid the influence on the electric components, especially the electromagnetic switch, etc. due to the scattering of abrasion powder, and there is a problem that extra parts are required. It was.

SUMMARY OF THE INVENTION An object of the present invention is to reduce the weight imbalance and to simplify the structure of drawing out the lead wires to the electromagnetic brake, while enabling the layout of the electrical components in the electrical box to be free. It is an object of the present invention to solve the problem that the abrasion powder is scattered in the electrical box without using a cover part.

[0007]

A motor having a motor shaft is provided on one of a pair of side plates which are rotatably supported with a load sheave interposed therebetween, and the other is provided on the load sheave by decelerating the power of the motor shaft. In an electric hoisting and traction device provided with a transmission reduction gear mechanism, a brake disk rotatable with the motor shaft, a brake piece opposed to the brake disk, and a power supply are provided between the motor and one side plate. An electromagnetic brake comprising an electromagnet for attracting and moving the brake piece and a brake body having an elastic body that presses the brake piece against the brake disc by interrupting energization is disposed, and the brake body is provided on the one side. It is characterized by being attached to a side plate.

The invention according to claim 2 is characterized in that the brake hub 22 of the electromagnetic brake 20 has a motor shaft 11 and a driven shaft 12 which is transmitted to the load sheave 5 via the reduction gear mechanism 10. And the joint portions 22d and 22e of the brake hub 2 are provided.
2, a mounting portion 22a of the brake disk 21 and a bearing tube portion 22c are provided side by side, and a bearing 61 is supported by the bearing tube portion 22c, and the brake hub 22 is shaken via the bearing 61. -It was rotatably supported by the key body 26. The invention according to claim 4 is characterized in that the brake hub 22 has
Mounting part 22a and bearing cylinder part 22c of brake disk 21
Are provided side by side, and the motor-side shaft hole 5a of the load sheave 5 for supporting the bearing cylinder portion 22c between the side plates 1 and 2 is provided.
The brake hub 22 is rotatably supported by the load sheave 5 via a bearing 70 interposed between the shaft hole 5a and the bearing cylinder 22c.

[0009]

According to the first aspect of the present invention, between the motor 7 and the motor side plate 1 of the load sheave 5,
The electromagnetic brake 20 is provided, and the electromagnetic brake 20 is provided.
Since the brake main body 26 is mounted on the motor side plate 1, the weight of the electromagnetic brake 20 is reduced by the motor.
The ratio added to the weight of the data 7 side can be reduced,
The weight imbalance can be reduced, and the lead wire to the electromagnet 23 of the electromagnetic brake 20 does not need to pass through the motor case which houses the motor 7, and is drawn out from the motor side plate 1. This allows the lead wire to be drawn out easily.

In addition, since the electromagnetic brake 20 is attached to the motor side plate 1, even if abrasion powder is generated, the abrasion powder can be prevented from scattering into the electrical equipment box, and the abrasion powder is scattered. It is possible to eliminate the effects on electrical components such as electromagnetic switches, which are most susceptible to the problem, and to make the layout of electrical components to be placed in the electrical box flexible, and to make the electrical box compact. It becomes.

According to the second aspect of the present invention, the brake hub 22 of the electromagnetic brake 20 is provided with the joint portions 22d and 22e for connecting the motor shaft 11 and the driven shaft 12, so that the above-mentioned actual opening is achieved. As shown in FIG. 1 of JP-A-61-52695, it is possible to eliminate the necessity of specially providing a transmission cylinder such as a coupling, so that the number of parts can be reduced and the cost can be reduced.

The invention according to claim 3 is characterized in that the brake
The Kihabu 22, blur - key provided in parallel and a mounting portion 22a and the bearing cylinder portion 22c of the disk 21, the bearing 61 is supported by the bearing cylinder portion 22c, the motion - Kihabu 22 the bearing 61
, Which is rotatably supported on the brake body 26 via
The brake disk 21 can be used as the above-described conventional transmission cylinder, and the brake body 26 can also be used as the bearing rod of the transmission cylinder, so that the number of parts can be further reduced. is there.

Further, according to the present invention, the bearing hub portion 22c provided on the brake hub 22 is loosely inserted into the motor side shaft hole 5a of the load sheave 5, and the brake hub 22 is provided.
Is rotatably supported on the load sheave 5 via the bearing 70, so that the bearing hub 22c can be used as a motor for the load sheave 5 while the brake hub 22 can also serve as the conventional transmission cylinder. The length of the electromagnetic brake 20 in the axial direction can be shortened by an amount corresponding to the insertion into the side shaft hole 5a. Therefore, the size of the entire apparatus can be reduced while the electromagnetic brake 20 is provided.

[0014]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 shows a construction in which a load sheave 5 is rotatably supported on a pair of side plates 1 and 2 facing each other at a predetermined interval via bearings 3 and 4. , 2, a motor case 6 is provided outside one side plate 1, an electric motor 7 is provided inside the motor case 6, and a gear case 8 and a motor case 8 are provided outside the other side plate 2. An electrical box 9 is provided, and a reduction gear mechanism 10 is provided inside the gear case 8.
When the motor 7 is driven, the motor shaft 11 and the load sheave 5
The load sheave 5 is driven through a driven shaft 12 interlocking with the motor shaft 11 and the reduction gear mechanism 10, while the motor of the motor 7 and the load sheave 5 is driven. A brake hub 22 having a brake disk 21 mounted between the rotor side plate 1 and an electromagnet 23
An electromagnetic brake 20 comprising a brake body 26 having brake pieces 24 and 25 pressed against the brake disk 21 by the above operation is arranged.
The key body 26 is attached to the motor side plate 1.

In the above configuration, an upper hook 32 is supported above the side plates 1 and 2 via a hook support pin 31, and a chain around the upper portion of the load sheave 5 is provided. A presser foot 33 is provided, and a limit lever 35 having a pair of operators 34 for guiding the load chain to the load sheave 5 is provided at a lower portion thereof.
, And the limit switch LS is operated by the swing of the limit lever 35.

In the motor 7 shown in FIG. 1, a rotor 38 provided inside a stator 37 is attached to the motor shaft 11,
It is rotatably supported via bearings 39 and 40, and the aluminum end ring 4 of the rotor 38 is provided.
Friction plates 43 and 44 are attached to the outer peripheral surfaces of the bearing cylinders 41a and 42a supporting the bearings 39 and 40 on the outer surfaces of the motor shaft 11 and the friction plates 43 and 44 are attached to the motor shaft 11.
The pressing members 45 and 46 having pressing surfaces opposing to 44 are mounted so as to be relatively non-rotatable and movable in the axial direction.
An elastic body 47 made of a coil spring or a disc spring is provided outside the elastic member 47, and the transmission torque from the rotor 38 to the motor shaft 11 is adjusted outside the elastic body 47 by adjusting the spring force of the elastic body 47. An overload setting adjuster 48 mainly composed of a nut for adjustment is screwed in, and an overload prevention device 49 is provided between the rotor 38 and the motor shaft 11. Note that in FIG.
Numeral 0 denotes an iron pipe fixed to the outer periphery of the bearing cylinder by shrink fitting or press fitting, and suppresses expansion of the bearing cylinder made of aluminum. Reference numeral 51 denotes a positioning plate of the motor case 6.

Further, the reduction gear mechanism 10 includes a first gear 52 provided integrally with the shaft end of the driven shaft 12,
A first intermediate shaft 55 having a second gear 53 and a third gear 54 meshing with the gear 52 and a second intermediate shaft 58 having a fourth gear 56 and a fifth gear 57 meshing with the third gear 54 And a sixth gear 59 that meshes with the fifth gear 57. The sixth cylindrical gear 59 is provided on the load sheave 5.
It is linked to 0.

Next, the electromagnetic brake 20 provided between the motor 7 and the motor side plate 1 will be described in detail. The electromagnetic brake 20 shown in FIG. 1 is composed of the brake disk 22 having a square outer peripheral surface on the brake hub 22.
The brake disk 21 is fixed to the mounting portion 22a, and the mounting portion 22a is fixed to the mounting portion 22a.
Is provided with a continuous bearing cylinder portion 22c via a step portion 22b,
Serrations are provided on the inner peripheral portion of the bearing cylinder portion 22c,
The shaft end of the motor shaft 11 and the shaft end of the driven shaft 12 are serrated, and joints 22d and 22e are provided to connect the shafts 11 and 12 to each other. The bearing 61 is supported by the
The key hub 22 is rotatably supported by the brake body 26.

Therefore, in the above configuration, the brake hub 22 can also serve as a transmission cylinder connecting the motor shaft 11 and the driven shaft 12, and the transmission cylinder used as a necessary part in the conventional example can be used. In addition, the brake body 26 can also serve as a bearing frame for supporting the transmission tube in the conventional example, and the bearing frame can be omitted together with the transmission tube, so that the number of parts is reduced. Thus, the cost can be reduced, and the rotation of the motor shaft 11 and the rotor 38 can be prevented.

Even when an overload prevention device 49 is provided between the rotor 38 and the motor shaft 11, the electromagnetic brake 20 is provided on the output side of the motor shaft 11, Even when the overload prevention device 49 slips, the motor shaft 11 and the driven shaft 12 are subjected to a braking action during the operation of the electromagnetic brake 20, so that the load is suspended by the load chain of the load sheave 5. Even if there is, the luggage can be prevented from dropping suddenly.

As shown in FIG. 2, the brake body 26 has the electromagnet 23 therein and a pair of brakes sandwiching the brake disk 21 in front of the electromagnet 23. The brake pieces 24 and 25 are arranged, and of the brake pieces 24 and 25, the outer brake piece 24 is fixed via a plurality of stepped bolts 27, and the inner brake piece 25 is fixed.
Is movably supported by the stepped bolt 27, and
On the back of the inner moving side brake piece 25,
An elastic body 28 is provided which comprises a coil spring for urging the brake piece 5 toward the fixed side brake piece 24 and pressing the brake pieces 24 and 25 against the brake disk 21.

When the brake body 26 is mounted on the motor side plate 1, the stepped bolt 27
Is screwed to the side plate 1 for attachment.

When the motor 7 is stopped, the electromagnetic brake 20 operates to stop the motor shaft 11 and the driven shaft 12. During operation, the electromagnet 23 is energized to move the movable side brake.
Aspirated key piece 25 to eliminate the braking operation, the mode - the time of stopping the motor 7 to cut off the energization of the electromagnet 23, the motor is braked by action of the elastic body 28 - motor shaft 11 and the driven shaft Then, the rotation of Twelve is stopped.

As described above, the electromagnetic brake 20 is disposed between the motor 7 and the motor side plate 1, and the brake body 26 is fixed to the side plate 1. Therefore, the proportion of the weight of the electromagnetic brake 20 added to the weight of the motor 7 can be reduced, and the center of gravity can be moved closer to the center between the side plates 1 and 2 to reduce the weight imbalance. You can do less.

Further, since the brake body 26 of the electromagnetic brake 20 is fixed to the side plate 1, the lead wire to the electromagnet 23 provided on the brake body 26 is shown by a chain line in FIG. As described above, the motor case 6
Can be guided from the side plate 1 through the gear side plate 2 and the gear case 8 into the electrical equipment box 9 without being passed through, and can be connected to the operation panel 29. As compared with the conventional example in which the key is provided, the lead wire lead-out configuration can be simplified.

Further, since the electromagnetic brake 20 is housed in the motor case 6, the problem that abrasion powder scatters in the electrical box 9 and adversely affects electrical components can be solved.

In the above embodiment, the bearing cylinder 22c
Is rotatably supported by the brake main body 26 via a bearing 61. As shown in FIG. 3, the brake hub 22 is loosely inserted into the motor side shaft hole 5a of the load sheave 5, and
May be rotatably supported by the load sheave 5 via a bearing 70.

That is, in the embodiment shown in FIGS.
Key body 26 is positioned on the motor side plate 1 side,
Since the fixed brake piece 24 is located on the motor 7 side,
In the embodiment shown in FIG. 3, the fixed brake piece 24 is positioned on the motor side plate 1 and fixed with a plurality of fixing bolts 71, and the brake main body 26 is connected to the motor side. And fixed to the fixed side brake piece 24 with a plurality of stepped bolts 72, and then the bearing cylinder 2
2c is loosely inserted into the motor side shaft hole 5a of the load sheave 5, and the brake hub 22 is connected to the load sheave 5 by a bearing 70 interposed between the shaft hole 5a and the bearing cylinder 22c. It is supported to rotate freely.

In this manner, the brake hub 2
Since the second bearing cylinder portion 22c is provided so as to overlap the load sheave 5, the axial length of the electromagnetic brake 20 can be reduced,
This makes it possible to reduce the size of the entire apparatus, and the positioning of the motor case 6 with respect to the motor side plate 1 can be performed by using the fixed brake pieces 24. Since the positioning plate 51 does not need to be provided as in the embodiment shown in (1) and can also be used, the cost can be reduced by reducing the number of parts.

In the embodiment described above, the brake hub 22 is provided with joint portions 22d and 22e,
The brake hub 22 allows the motor shaft 11 and the driven shaft 12 to also serve as a conventional transmission cylinder, but the brake disc 21 is used for the motor shaft 11 or the driven shaft 1.
2 may be directly attached. In this case, the motor shaft 11
And the driven shaft 12 may be connected using a transmission cylinder as in the conventional example.

When the transmission cylinder is used, the transmission cylinder may be supported by the brake main body 26, but may be supported by using another bearing frame as in the conventional example.

Further, the bearing 3 for supporting the load sheave 5 is attached to the side plate 1, but may be attached to the brake body 26.

When the joint portions 22d and 22e of the motor shaft 11 and the driven shaft 12 are provided on the brake hub 22 , as shown in FIG. 1 and FIG.
A bearing cylinder portion 22c is provided on the key hub 22 and the bearing cylinder portion 2c is provided.
2c, a relay shaft 80 having connecting shafts 81 and 82 projecting from both sides in the axial direction is supported on the brake hub 22 as shown in FIG. 4, and the motor shaft 11 and the driven shaft 80 are driven. At the shaft end of the shaft 12, fitting recesses 83 and 84 for receiving the shafts 81 and 82 may be provided, and the joints 22d and 22e may be formed by the shafts 81 and 82.

In this case, the shafts 81 and 82 may be provided on the relay shaft 80 provided separately from the brake hub 22 and connected by serration or the like, or may be integrated. The brake hub 22 is provided with a bearing 6 as shown in FIG.
Although it is preferable to support the brake main body 26 through the support 1, the brake body 26 may be supported through the bearing 70 on the load sheave 5 as shown in FIG. 3.

[0035]

According to the first aspect of the present invention, the mode
The electromagnetic brake 20 is disposed between the motor 7 and the motor side plate 1 of the load sheave 5.
Since the brake main body 26 of the key 20 is attached to the motor side plate 1, the proportion of the weight of the electromagnetic brake 20 added to the weight of the motor 7 can be reduced. Unbalance can be reduced, and the lead wire of the electromagnetic brake 20 to the electromagnet 23 is
No need to pass through the motor case that houses the motor 7
The lead wire can be pulled out from the side plate 1, so that the lead wire can be drawn out easily.

In addition, since the electromagnetic brake 20 is attached to the motor side plate 1, even if abrasion powder is generated, the abrasion powder can be prevented from scattering into the electrical equipment box, and the abrasion powder is scattered. It is possible to eliminate the effects on electrical components such as electromagnetic switches, which are most susceptible to the problem, and to make the layout of electrical components to be placed in the electrical box flexible, and to make the electrical box compact. It becomes.

In the second aspect of the present invention, the brake hub 22 of the electromagnetic brake 20 is provided with the joint portions 22d and 22e for connecting the motor shaft 11 and the driven shaft 12, so that the above-described actual opening and closing operation is possible. As shown in FIG. 1 of JP-A-61-52695, it is possible to eliminate the necessity of specially providing a transmission cylinder such as a coupling, so that the number of parts can be reduced and the cost can be reduced.

The invention according to claim 3 is characterized in that the brake
The Kihabu 22, blur - key provided in parallel and a mounting portion 22a and the bearing cylinder portion 22c of the disk 21, the bearing 61 is supported by the bearing cylinder portion 22c, the motion - Kihabu 22 the bearing 61
, Which is rotatably supported on the brake body 26 via
The brake disk 21 can be used as the above-described conventional transmission cylinder, and the brake body 26 can also be used as the bearing rod of the transmission cylinder, so that the number of parts can be further reduced. is there.

Further, according to the present invention, the bearing cylinder portion 22c provided on the brake hub 22 is loosely inserted into the motor side shaft hole 5a of the load sheave 5, and the brake hub 22 is provided.
Is rotatably supported on the load sheave 5 via the bearing 70, so that the bearing hub 22c can be used as a motor for the load sheave 5 while the brake hub 22 can also serve as the conventional transmission cylinder. The length of the electromagnetic brake 20 in the axial direction can be shortened by an amount corresponding to the insertion into the side shaft hole 5a. Therefore, the size of the entire apparatus can be reduced while the electromagnetic brake 20 is provided.

[Brief description of the drawings]

FIG. 1 is a partially omitted longitudinal sectional view showing one embodiment of the present invention.

FIG. 2 is an enlarged sectional view of a main part.

FIG. 3 is an enlarged sectional view showing a second embodiment and corresponding to FIG. 2;

FIG. 4 is an enlarged sectional view of a main part showing a third embodiment.

[Explanation of symbols]

Reference Signs List 1 motor side plate 2 side plate 5 load sheave 7 motor 10 reduction gear mechanism 11 motor shaft 12 driven shaft 20 electromagnetic brake 21 brake disk 22 brake hub 22a mounting portion 22c bearing cylinder 22d, 22e Joint parts 24, 25
Brake piece 26 Brake body 61 Bearing 70 Bearing

Claims (4)

(57) [Claims] 1. A reduction gear mechanism having a motor having a motor shaft on one of a pair of side plates rotatably supporting the load sheave therebetween, and a reduction gear mechanism for reducing the power of the motor shaft and transmitting the reduced power of the motor shaft to the load sheave. In the electric hoisting and traction device provided respectively, a brake disc rotatable with the motor shaft between the motor and one of the side plates, a brake piece facing the brake disc, and the brake piece being energized. And a brake body having an elastic body that presses the brake piece against the brake disk by interrupting the current supply. The electromagnetic brake includes an electromagnetic brake, and the brake body is attached to the one side plate. An electric hoisting and traction device, characterized in that it is provided. 2. A brake disk for an electromagnetic brake, comprising a brake hub at a central portion thereof, and a joint portion for connecting a driven shaft interlocked with a load sheave via a motor shaft and a reduction gear mechanism to the brake hub. The electric hoisting and traction device according to claim 1, wherein 3. A brake disk mounting portion and a bearing cylinder portion are arranged side by side on the brake hub, a bearing is supported on the bearing cylinder portion, and the brake hub is rotatably supported on the brake body via the bearing. The electric hoisting and traction device according to claim 2, wherein 4. A mounting portion for a brake disk and a bearing cylinder portion are juxtaposed on the brake hub, and the bearing cylinder portion is loosely inserted into a motor-side shaft hole of a load sheave. 3. The electric hoist according to claim 2, wherein the brake hub is rotatably supported on the load sheave via a bearing interposed in the hoist.
Traction device.