JPS6114296Y2 - - Google Patents

Description

[Detailed description of the invention] This invention is an improvement of a sealed motor in which motor accessory equipment such as a burnout protection device is attached to a bracket paired with a stator frame that supports and surrounds the stator, and is connected to the stator through electric wires. It is related to.

A conventional motor of this type will be explained with reference to FIG. In the figure, 1 is a stator consisting of a stator coil 1a and a stator core 1b, 2 is a cylindrical stator frame that supports and surrounds the stator 1,
3 is a rotor paired with stator 1, 4 is rotor 3
5 is the stator frame 2
A bracket 6 is detachably attached to the axial end of the bracket 5 and is connected to the stator coil 1a by an electric wire 7 to prevent the stator 1 from being burnt out due to overcurrent.
A motor accessory device 8 consisting of a burnout protection device for protecting the motor is a bearing supported by the bracket 5 and rotatably supporting the motor shaft 4.

It is well known that in a motor configured in this manner, when the stator 1 is energized and energized, the motor shaft 4 rotates integrally with the rotor 3.
However, since the accessory device 6 is attached to the inside of the bracket 5, it cannot be assembled unless there is some slack in the electric wire 7. Therefore, not only is a large amount of electric wire 7 required, but the slack part comes into contact with the rotor 3. However, it has disadvantages such as problems such as wire breakage.

This invention was devised in view of the above-mentioned conventional circumstances, and was devised for the purpose of providing a motor in which the slack in the electric wires connecting the stator and the attached equipment can be reduced, as shown in Fig. 2 below. An example of this invention will be described. In the figure, 9 is a bracket detachably attached to the axial end of the stator frame 2, and 9a is a recess formed on the side of the bracket 9 opposite to the stator frame 2 for storing the motor accessory 6. . 9
b is the space formed by the recess 9a, and 9c is the space 9b and the stator frame 2 of the bracket 9.
A hole communicating with the side space, 10 is an electric wire inserted into the hole 9c and connects the stator 1 and the attached device 6, 11 is attached to the side of the bracket 9 opposite to the stator frame 2 through a packing 12, and is connected to the recess 9a. 13 is a bolt that attaches the lid 11 to the bracket 9, which is separate from the bolt (not shown) that fixes the bracket 9 to the stator frame 2. It is constructed as a body. Reference numeral 14 denotes an elastic body that presses against the accessory device 6 and the lid 11 to prevent the accessory device 6 from moving. Note that the description of other symbols is the same as the description of FIG. 1 and will be omitted.

With this configuration, the operation as a motor is the same as the conventional one, but the attached equipment 6
is arranged outside the bracket 9, and the stator 1 and the accessory device 6 are connected by the electric wire 10 led out through the hole 9c, so there is no need to loosen the electric wire 10. In addition, since the accessory device 6 can be hermetically sealed with an extremely simple structure in which the recess 9a is covered with the plate-shaped lid 11, it is extremely convenient in the case of a device where the accessory device 6 is hermetically sealed, such as an underwater motor. Also,
Even when the bracket 9 is fixed to the stator frame 2, the accessory device 6 can be attached or detached by removing the cover 11 fixed with the bolt 13. Further, the inner surface of the lid 11 comes into pressure contact with the accessory device 6 via the elastic body 14, so that the accessory device 6 is fixed.

This idea is structured as above, so
The stator and motor accessory equipment can be connected without loosening the electric wires. Therefore, not only the required amount of the electric wire is reduced compared to the conventional case, but also it is possible to prevent the electric wire from coming into contact with the rotor and being damaged as in the conventional case. However, since the above-mentioned accessory equipment can be removed and installed by removing the lid, the above-mentioned accessory equipment can be easily repaired or replaced. Accidents such as cutting of the electric wire due to the bracket falling off can be prevented. Moreover, the accessory device is fixed by pressing the lid onto the accessory device, that is, the lid also serves as a fixing device for the accessory device, and no special fixing device is required, so the number of parts is small. , the above-mentioned accessory equipment can be easily attached and detached.

[Brief explanation of the drawing]

Figure 1 is a partial sectional view of a conventional motor, Figure 2 is a partial sectional view of a conventional motor.
The figure is a partial sectional view of an embodiment of this invention. In the figure, 1 is a stator, 2 is a stator frame, 6 is a motor accessory, 9 is a bracket, 9
a is a recess, 9c is a hole, 10 is an electric wire, 11 is a lid,
12 is a packing, 13 is a bolt, and 14 is an elastic body. Note that the same reference numerals in the figures indicate the same or equivalent parts.

Claims (1)

[Scope of utility model registration request] In a bracket that is paired with a stator frame that supports and surrounds the stator, and in which accessory equipment connected to the stator via electric wires is attached, a recess is provided on the outside of the bracket, and the accessory equipment is placed within the recess. In addition, a lid is disposed at the open end of the recess, and the bracket is fixed with a bolt that is separate from the bolt that fixes the bracket to the stator frame, with the lid being in pressure contact with the accessory device. A closed type motor, characterized in that it is fixed to the motor and the attached equipment is sealed.