JPS5910941Y2 - pulse motor - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a pulse motor, and more particularly to a pulse motor with an improved reinforcing support structure.

Fig. 1 is a schematic diagram showing the principle of a general pulse motor; in the figure, 2 is a transmission switch having both A and B contacts;
is a battery power source; 4 is a field core around which is wound a coil 5 which is supplied with current from the battery power source 3 via a switch 2; and 6 is a shaft between both magnetic poles 4A and 4B of the field core 4. The rotor 7 is rotatable around the rotor 7, and 8A and 8B are commutating poles arranged at a constant angle α with the magnetic poles 4A and 4B of the field core, respectively.

Incidentally, the rotor 6 is made up of a permanent magnet with S and N poles arranged at an angle of 180 degrees.

In this structure, by alternately switching the transmission switch 2 between the A and B poles, the magnetic poles of the field core 4 are alternately excited to the N and S poles to rotate the rotor 6.
, 8B have the function of defining the rotational direction of the rotor 6 in the direction of arrow X.

Now, in such a pulse motor, conventionally the commutating pole 8A,
When installing the 8B, the structure was such that it was fixed to the main body from the outside with screws, etc., but with this structure, assembly was complicated, and the poles could be damaged due to external factors. In addition to the problem that the position of the commutating poles becomes out of order, there is also the problem that dirt and the like enter the rotor from the outside, and furthermore, it is difficult to position the commutating poles.

Therefore, the purpose of the present invention is to eliminate the drawbacks of the above-mentioned prior art.
To provide a pulse motor that is easy to assemble and has strong resistance to dust intrusion.

FIG. 2 is a needle perspective view of a pulse motor according to an embodiment of the present invention, which is constructed by combining a commutating pole as shown in the perspective view of FIG. 3 and a case as shown in the perspective view of FIG. It is something that

That is, the commutative pole 8 has a leg portion 10 and a pole piece 11, as shown in FIG.
A, 11 and B are integrally formed with a U-shaped cross section,
A hole 12 is provided in the center of the leg portion 10 through which the shaft 7 of the rotor 6 can pass.

On the other hand, as shown in FIG. 4, the case 13 has a commutating pole fixing groove 15 for fixing the commutating poles 8A, 8B on its inner peripheral surface, and a recess 14 for positioning the commutating poles 8A, 8B. It has a cylindrical shape with a fixing groove 19 for the field core 4, and one end thereof is closed by a face member 18 having a bearing hole 16 for supporting the shaft 7 for the rotor 6. It is being

The commutative pole 8 and the case 13 are arranged as shown in FIG.
The pole pieces 11A and 11B are the commutator fixing groove 1 of the case 13.
5, and the legs 10 are further fitted into the recesses 14.
After the field core 4 is fitted into the fixing groove 19, the cover 20 is fitted to the end face of the commutating pole 8 and the case 13, and the cover 20 is fixed to the case 13 with the screw 21. They are combined depending on what they do.

Incidentally, a bearing 22 that supports the shaft 7 of the rotor 6 is formed in the center of the lid 20.

FIG. 5 is a front view of the pulse motor assembled as shown in FIG. 2, with the lid 20 removed, and FIG. 6 is a vertical cross-sectional view. In the pulse motor, the commutative pole 8 is inserted into the fixing groove 15 of the case 13, so the positioning of the commutative pole 8 is easy, and it can be fixed without using screws, so it is easy to assemble. Since the commutative pole 8 is housed inside the case 13 and further fixed by the lid 20, it has advantages such as a simple appearance without being exposed to the outside, and also has a structure in which the commutative pole can be attached to the outside. Compared to
Since the rotor 6 has a sealed structure, there is no risk of dirt entering the rotor 6.

In the above embodiment, the case 13 is provided with both the fixing groove 15 and the recess 14 of the commutative pole 8, but only the groove 15 for fixing the commutative pole 8 is provided in the case 13.
A similar effect can be obtained by providing a positioning recess on the lid 20 side.

As described above, according to the present invention, it is possible to obtain a new pulse motor that is easy to assemble, has a structure that makes it difficult for the interpolation position to become narrow due to external factors, and makes it difficult for dust to enter. It is something.

[Brief explanation of the drawing]

Figure 1 is a schematic diagram showing the principle of a general pulse motor, Figure 2 is an explanatory diagram of the assembly of a pulse motor according to an embodiment of the present invention, and Figures 3 and 4 are parts of the pulse motor shown in the second diagram. FIG. 5 is a front view of the second illustrated pulse motor with the lid removed, and FIG. 6 is a longitudinal sectional view of the second illustrated pulse motor. Throughout each figure, the same reference numerals indicate the same or equivalent parts, 4 is the field core, 5 is the coil, 6 is the rotor, 7 is the shaft, 8 is the commutating pole, 11 A, 11 B are the pole pieces, 13 is the case, 14 1 is a recessed portion, and 15 is a copole fixing groove.

Claims (1)

[Scope of utility model registration request] Rotatable around a U-shaped field core around which a coil to which pulsed power is applied is wound, and an axis parallel to the parallel sides of the field core between two magnetic poles of the field core. In a pulse motor equipped with a magnetic rotor provided in the field core and a commutating pole arranged at a certain angle with the two magnetic poles of the field core, the field core is fitted into a recess into which reinforcement is fitted on the inner peripheral surface. A case having a cylindrical shape and a fixing groove for mating fixes the commutative pole and the field core and covers the magnet rotor, and a disk-shaped lid secures the field coil, the commutative pole, and the rotor. A pulse motor characterized by being fixed in the axial direction.