JPH022100Y2 - - Google Patents

Description

[Detailed description of the invention] This invention provides a square seat at the end of the rotor shaft,
The present invention also relates to a manual release device in which a hollow brake release screw is screwed onto a brake cover. Conventionally,
With this type of equipment, when there is a power outage, as shown in Figure 1,
Release push bolt 2 screwed onto brake cover 1
When the release lever 3, which is fixed to the pin 5 of the armature 4, is pressed by rotating it with a handle or spanner as shown in Figs. , the rotor shaft 7 is released, but as shown in FIG. After disconnecting the motor M from the motor M, the rotor shaft S must be manually released on the brake B side as described above, and the rotor shaft S must be rotated to the position on the load L side, which saves time and effort each time. Since the work of disconnecting the load L is forced, there is a drawback that the work is extremely difficult in a relatively narrow place where space is limited.

In view of the above, this invention allows you to manually release the brake while the load is connected even if the power supply is stopped.
At the released location, use the same tool by attaching and detaching the attachment to the tip of the tool, insert it into the hollow part of the release screw, fit it into the square washer provided at the tip of the rotor shaft, and remove the rotor shaft with the load connected. The object of the present invention is to provide a manual release device which can be turned, and the present invention will be described below with reference to an embodiment shown in FIGS. 4-6. In FIG. 3, each member 1 to 7 is the same as the conventional type described above, and the explanation is omitted, but the improvement of the present invention is that the release screw 8 formed in a hollow shape is screwed into the brake cover 1. In addition, a square seat 9 is provided at the brake side end of the rotor shaft 7. In the present invention, braking is normally applied, but when the coil 12 is energized, a strong electromagnetic attraction force is generated between the field 11 and the amateur 4, which overcomes the force of the spring 6 and quickly starts the amateur 4. The brake is released by creating a slight gap between the inner disk 13 and armature 4, the inner disk 13 and outer disk 14, and the inner disk 13 and end plate 15, which have been suctioned and pressed together.
Here, when the electricity is cut off, the electromagnetic attraction force disappears immediately, and the armature 4 generates a frictional force to press the outer disk 14, inner disk 13, and end plate 15 together by the force of the spring 6, and the inner disk 13 and the hub 16 is braked. The present invention is for manually releasing this, and first, after removing the screw cover 10,
As shown in Figures 4 to 6, an attachment 18 is attached to the tip of the release tool 17 (handle), and the projection 19 of this attachment 18 fits into the groove 20 provided on the screw 8 side, and the attachment is rotated in the screwing direction. Then, the tip of the screw 8 presses the lever 3 fixed to the pin 5 provided on the armature 4, overcomes the elastic force of the spring 6, pushes the armature 4 in the axial direction, and releases the brake.
Next, to rotate the rotor shaft 7 at the same location, remove the attachment 18 from the release tool 17, insert the tool 17 into the hollow part of the release screw 8, and fit it into the square seat 9 provided at the tip of the rotor shaft 7. , manually rotate the shaft 7 with the load L connected. After completing the work, attach the attachment 18 to the tip of the release tool 17 again and return the brake release screw 8 to its original position, and the armature 4 will be pushed away by the elastic force of the spring 6, and the brake will be applied. Become. That is,
The main point of this invention is that, as mentioned above, the attachment can be simply attached and detached at the same place where the brake was manually released, and using the same tool.
This allows the rotor shaft to be turned by hand while the load is connected.

According to the present invention as described above, in the event of a power outage, the rotor shaft can be manually rotated without disconnecting the load from the electric motor, and the brake can be released and the rotor shaft can be manually rotated in the same place. The work is extremely easy even when the installation space is small, and all you need is a release tool (handle) and attachment.
It is extremely safe and has remarkable effects such as simplifying the work and shortening the work time.

[Brief explanation of the drawing]

Fig. 1 is a half sectional view of a brake unit including a conventional release device, Fig. 2 is a schematic configuration diagram showing the relationship between the electric motor and a load, and Fig. 3 is a half sectional view showing the positioning of the present invention in the electric motor. , Figure 4 is a diagram showing the relationship between the tool, attachment, and corner seat of the present invention, Figure 5
The figure is a perspective view showing the state in which the rotor shaft of the present invention is manually rotated, and FIG. 6 is a diagram showing the state in which the rotor shaft of the present invention is manually rotated. 1...Brake cover, 3...Lever, 4...
Armature, 6...Spring, 7...Rotor shaft, 8...Hollow screw, 9...Shaft end square seat, 17...Release tool (handle),
18... Attachment, 19... Protrusion of attachment, 20... Groove of screw head.

Claims (1)

[Scope of utility model registration request] In an electric motor equipped with a spring-close type brake, a square seat is provided at the end of the rotor shaft on the brake side, and a hollow brake release screw is screwed onto the brake cover, and the release tool is inserted through an attachment attached to the tip of the release tool. , provide a means to manually rotate the rotor shaft while the load is connected by pressing the release lever fixed to the armature pin in the axial direction, and using the above tool with the attachment removed at the same position after releasing the brake. A manual release device for spring-closed brakes.