JPH079068U - Rotating electric machine - Google Patents

Abstract

(57) [Summary] [Structure] The chattering noise due to the resonance of the air guide plate is prevented from being generated, and the workability of assembling the air guide plate is improved. [Effect] When attaching the baffle plate to the frame, insert the baffle plate from the opening of the frame and press it against the multiple protrusions.
When pushed in as it is, the elasticity of the projection and the baffle plate causes the projection to move beyond the projection, and is sandwiched between the step and the projection. The distance between the step portion and the protrusion is set to be slightly smaller than the axial dimension 1 of the outer periphery of the baffle plate so that the step portion and the protrusion can be sufficiently held by the fixing force. For this reason, since the baffle plate can be firmly attached to the frame, the rigidity of this portion is increased, resonance is prevented, and chattering noise is prevented from being generated. Moreover, since the baffle plate can be fixed only by pushing it from the frame opening, the assembling workability is improved.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to an open type rotating electric machine having a steel plate frame, and more particularly to mounting a wind guide plate.

[0002]

[Prior art]

 A conventional technique will be described with reference to FIG. FIG. 3 is a side view of the rotary electric machine showing the upper half in cross section. A stator core 2 is arranged on the inner surface of a cylindrical frame 1. In addition, end plates 4 and 4 having bearings 3 are provided at both ends of the frame 1, and a wind guide plate is provided between the end plate 4 and the spigot step 1a provided at both ends of the frame 1. 5 is attached. A rotary shaft 6 is supported by the bearings 3 and 3.

[0003]

[Problems to be solved by the device]

 However, since the spigot step 1a is very small, the wind guide plate 5 sandwiched between the spigot step 1a and the end plate 4 does not have sufficient holding force to vibrate from the rotating electric machine. There was a case where it resonated and generated a crackling sound. Further, at the time of assembly, the baffle plate 5 needs to be set on the frame 1 at the same time as the end plate 4 and fixed by using bolts (not shown), which is a troublesome assembling work and poor workability. The present invention solves the above problems, and an object thereof is to prevent chatter noise from being generated due to resonance of a wind guide plate, and to improve assembly workability for attaching the wind guide plate.

[0004]

[Means for Solving the Problems]

 In the rotating electric machine according to the present invention, a step portion is provided near the opening of the frame by pipe expansion processing, and further, a plurality of protrusions protruding toward the inner peripheral side are provided on the end side of the frame with respect to the step portion and the step portion is protruded. It is characterized by holding a baffle plate between and.

[0005]

[Operation] When attaching the baffle plate to the frame, insert the baffle plate from the opening of the frame, press it against the multiple protrusions, and push it in as it is, so that the elasticity of the protrusions and the baffle plate causes the protrusions to be exceeded. It is sandwiched between the step and the protrusion. The distance between the step portion and the protrusion is set to be slightly smaller than the axial dimension 1 of the outer periphery of the baffle plate so that it can be sufficiently held by the fixing force.

Therefore, since the baffle plate can be firmly attached to the frame, the rigidity of this portion is increased, resonance is prevented, and chattering noise is prevented from being generated. In addition, the baffle plate can be fixed simply by pushing it from the opening of the frame, which improves the assembly workability.

[0007]

【Example】

 The invention will be described below with reference to the drawings. FIG. 1 is a side view of a rotary electric machine showing an embodiment of the present invention in an upper half section. A stator core 2 is arranged on the inner surface of a cylindrical frame 1, and end plates 4, 4 having bearings 3, 3 are arranged at both ends of the frame 1. A step portion 1b is provided near both openings of the frame 1 by pipe expansion processing, and further, a plurality of protrusions 1c projecting toward the inner peripheral side are provided on the end side of the step portion 1b so as to be connected to the step portion 1b. Hold the wind guide plate 5 between them. The outer circumference of the baffle plate 5 has an axial dimension 1 and is in surface contact with the inner surface of the frame 1.

When the baffle plate 5 is attached to the frame 1, the baffle plate 5 is inserted from the opening of the frame 1, pressed against the plurality of protrusions 1c and pushed in as it is, so that the elasticity of the protrusions 1c and the baffle plate 5 causes It goes beyond the protrusion 1c and is sandwiched between the step portion 1b and the protrusion 1c. The distance between the step portion 1b and the protrusion 1c is set to be slightly smaller than the axial dimension 1 of the outer periphery of the baffle plate 5 and to be held with a sufficient fixing force.

According to the present embodiment, since the baffle plate 5 can be firmly attached to the frame 1, the rigidity of this portion is increased, resonance can be prevented, and chattering noise can be prevented from being generated. Further, since the baffle plate 5 can be fixed by inserting it from the opening of the frame 1 and pushing it in as it is, the assembling workability is improved.

(Other Embodiment) FIG. 2 is another embodiment, and is a side view of a rotating electric machine showing an upper half in cross section. It is the same as the embodiment of FIG. 1 except that the axial dimension l of the outer periphery of the air guide plate 5 is equal to the thickness of the air guide plate. In the case of the embodiment shown in FIG. 2 as well, the distance between the step portion 1b and the protrusion 1c is slightly smaller than the axial dimension 1 of the outer circumference of the baffle plate 5, and is set so that it is held with a sufficient fixing force. In this case, the contact area between the outer periphery of the baffle plate 5 and the inner surface of the frame 1 is smaller than that in the embodiment of FIG. 1, but the function and effect of the invention are the same.

[0011]

[Effect of device]

 As described above, according to the present invention, it is possible to prevent chatter noise due to resonance of the wind guide plate. Further, the workability of assembling the baffle plate is improved.

[Brief description of drawings]

1 is a side view of a rotary electric machine showing an embodiment of the present invention in an upper half in section,

FIG. 2 is a view corresponding to FIG. 1 showing another embodiment of the present invention,

FIG. 3 is a view corresponding to FIG. 1 showing a conventional technique.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Frame 1a ... Inlay part step difference 1b ... Step part 1c ... Protrusion 5 ... Baffle plate

Claims (1)

[Scope of utility model registration request] 1. An open-type rotating electric machine having a steel plate frame, wherein a step portion is provided near the opening portion of the frame by pipe expansion processing, and further protrudes toward the inner peripheral side of the end portion of the frame with respect to the step portion. A rotary electric machine, characterized in that the projection is provided and a baffle plate is sandwiched between the step and the projection.