JPH0412770Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] This invention relates to a motor in which a frame into which a stator is fitted and a bracket attached to both ends of the frame with bolts or the like are improved.

[Prior Art] A conventional motor has a configuration as shown in FIG. 2, for example. That is, the motor outer shell is composed of a frame 8 made of cast iron and a pair of left and right brackets 9. The frame 8 has a cylindrical shape, and radially protruding fins are integrally formed on the outer periphery of the frame 8 in the form of a tooth row. A stator is fitted within this frame 8. The bracket 9 is a member that closes both ends of the frame 8 and rotatably supports the rotating shaft 4 by a bearing fitted in the center. The frame 8 is clamped by the tightening force of the through bolt. In addition to these, as is well known, there are many motors whose outer shells are made of sheet metal.

[Problems to be solved by the invention] In the conventional motor having the above-mentioned configuration, in order to maintain alignment when assembling the bracket 9 to the frame 8, a step A for positioning is provided at the end of the bracket 9. Not only does it have to be formed by cutting, making it troublesome and expensive to manufacture, but the bracket made of sheet metal, which is manufactured based on the outer diameter of the stator, is not applicable to the extruded frame 8. There are some inconveniences that it is not possible to do.

This invention was made in order to solve such conventional problems, and the purpose is to obtain a motor that is easy to manufacture and has good alignment properties, without the need to provide a structure for positioning the bracket on the extruded frame. shall be.

[Means for Solving the Problems] The motor according to this invention has a frame width, which is the dimension in the center line direction of a cylindrical frame made of extruded material such as aluminum, into which the stator is fitted and held. A bracket that is formed shorter than the stator width, which is a dimension in the same direction regarding the stator, and that both ends of the stator protrude in the direction of the center line on both sides of the frame when the stator is fitted inside, and supports the rotating shaft. are positioned at each protruding portion and assembled on both sides of the frame.

[Function] In this invention, when the stator is internally fitted into the frame, both ends of the stator protrude in the direction of the center line on both sides of the frame, creating a stepped structure for positioning when assembling the bracket. There is no need to provide a positioning structure on the frame. Further, a bracket made of a sheet metal manufactured based on the outer diameter of the stator can be used as is.

[Embodiment of the invention] A motor as an embodiment of the invention shown in FIG. 1 includes a frame 1 whose motor outer shell is obtained by extrusion molding of aluminum, and a pair of left and right brackets 2.
It is made up of. The frame 1 has a cylindrical shape, and radially projecting fins 3 are integrally formed on the outer periphery of the frame 1 in the form of a tooth row. A stator 4 is press-fitted into the frame 1 and attached thereto. Bracket 2
is a member that closes both ends of the frame 1 and rotatably supports the rotating shaft 5 by a bearing fitted in the center, and the bracket 2 straddles the frame 1.
The frame 1 is fastened to a state where the frame 1 is clamped by the tightening force of several through bolts 6 inserted between them. The fins 3 of the frame 1 are not all of the same shape and size, and the one located at the position corresponding to the flange of the bracket 2 is thicker than the other fins, and the two facing each other form a channel through which the through bolt 6 passes. There is. The feature of the motor of this embodiment is that the frame width, which is the dimension in the center line direction of the cylindrical frame 1 made of extruded material such as aluminum, which fits inside the stator 4 and holds it, is the dimension in the same direction with respect to the stator 4. This is because the stator width is shorter than the width of the stator. As a result, when the stator 4 is internally fitted into the frame 1, both ends of the stator 4 can be made to protrude from both sides of the frame in the direction of the center line, and the bracket 2 that pivotally supports the rotating shaft 5 can be made to protrude from each side of the frame. It can be assembled to both sides of the frame 1 in a aligned state by positioning the parts by the stepped structure. Each bracket 2 is provided with a stepped portion 7 that contacts the end surface of the stator 4 in the assembled state and restricts movement of the stator 4 in the direction of the center line.

By bringing each bracket 2 into contact with the end face of the frame 1, and fastening the frame 1 and the brackets 2 by inserting the through bolts 6, a motor outer shell with high alignment is constructed.

As is clear from the above configuration, even a bracket made of a sheet metal manufactured based on the outer diameter of the stator 4 can be used as is. Note that the stepped portion 7 of the bracket 2 may be formed with a protrusion by punching in the radial direction, or a screw may be inserted into the stator 4 from the frame 1 in the radial direction.

[Effects of the invention] As is clear from the above description of the embodiments, the motor of the invention has a cylindrical frame made of extruded material such as aluminum that fits inside the stator and holds it. A certain frame width is formed to be shorter than the stator width, which is a dimension in the same direction regarding the stator, and with the stator fitted inside, both ends of the stator protrude in the direction of the center line on both sides of the frame, and the rotation axis The brackets that support the frame are positioned at each of these protruding parts and assembled on both sides of the frame.
When the stator is fitted into the frame, both ends of the stator protrude toward the center line on both sides of the frame, creating a stepped structure for positioning when assembling the bracket. Therefore, there is no need to provide the frame with a structure for positioning. Also,
A bracket made of sheet metal manufactured based on the outer diameter of the stator can be used as is, and the alignment is high, the air alignment accuracy of the stator and rotor can be ensured, and manufacturing is easy.

[Brief explanation of the drawing]

FIG. 1 is a front view of a motor showing an embodiment of the present invention, and FIG. 2 is an explanatory view including a cross section of the motor showing a conventional example. In the figure, 1 is a frame, 2 is a bracket,
4 is a stator, and 5 is a rotating shaft. Note that the same reference numerals in the figures indicate the same or equivalent parts.

Claims (1)

[Scope of utility model registration request] The frame width, which is the dimension in the center line direction of a cylindrical frame made of an extruded material such as aluminum, into which the stator is fitted and held, is formed to be shorter than the stator width, which is the dimension in the same direction regarding the stator. With the stator fitted inside, both ends of the stator are configured to protrude in the direction of the center line from both sides of the frame, and the left and right brackets that pivotally support the rotating shaft are positioned by these protruding parts, and the frame is A motor characterized by being directly fitted into stators on both sides.