JPH0723966U - AC servo motor - Google Patents

Abstract

(57) [Summary] [Purpose] Prevents creep by inserting the outer ring of the AC servo motor bearing into the bracket's bearing insertion side end face with multiple or continuous protrusions and then caulking and fixing it. However, it is an object of the present invention to provide an AC servomotor which has a reduced number of parts and a reduced number of man-hours, and has good mass productivity. [Structure] After inserting the bearing 23 into the housing portion of the bracket 22 during motor assembly,
By crimping the housing part of the bearing 23
It is possible to realize a motor which is pressed against the bracket 22 and can prevent creep, and which has a reduced number of parts and man-hours, and which can be mass-produced.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to an AC servomotor.

[0002]

[Prior art]

 AC servo motors used to drive various machines use ball bearings that restrain the rotational movement of the rotating or oscillating machine shaft, and support the weight of the shaft and the load applied to the shaft.

A conventional AC servomotor will be described below. FIG. 3 shows the configuration of a conventional AC servomotor. In FIG. 3, 31 is an encoder, 32 is a bracket B, 33 is a stator, 34 is a bracket A, 35 is a bearing B, 36 is a holding plate fixing screw, 37 is a holding plate, 38 is a bearing A, 39 is a rotor. .

As shown in FIG. 4, after the bearing 45 is put into the housing portion of the bracket 42, the holding plate 44 is screwed with the holding plate fixing screw 43 to press the outer ring of the bearing against the bracket to prevent creep. ing.

[0005]

[Problems to be solved by the device]

 However, the above configuration has a problem that it is not suitable for mass production because the number of parts is large and the number of man-hours is large.

The present invention solves the above-mentioned conventional problems. An AC servo that reduces the number of parts and the number of work steps by fixing the outer ring of the bearing used in the AC servo motor by caulking and fixing it with the housing of the bracket. The purpose is to provide a motor.

[0007]

In order to achieve this object, the AC servomotor of the present invention has a structure in which the outer ring of the bearing is fixed by caulking at the housing's housing.

[0008]

[Action]

 With this configuration, the number of parts used for the AC servo motor and the number of work steps can be reduced, so that an AC servo motor with good mass productivity can be obtained.

[0009]

【Example】

 An embodiment of the present invention will be described below with reference to the drawings.

In FIG. 1, 11 is an encoder, 12 is a bracket B, 13 is a bearing B 1, 14 is a stator, 15 is a bracket A, 16 is a bearing A, and 17 is a rotor.

The AC servomotor configured as described above will be described with reference to FIG. After assembling the bearing 23 in the housing portion of the bracket 22 when assembling the AC servomotor, the bearing 23 is pressed against the bracket 22 by caulking the housing portion of the bracket 22 to prevent creep.

[0012]

[Effect of device]

 As described above, the present invention can reduce the number of parts and work man-hours of an AC servo motor, and realize an AC servo motor with good mass productivity that prevents creep of bearings.

[Brief description of drawings]

FIG. 1 is a sectional view of an AC servomotor according to an embodiment of the present invention.

FIG. 2 is a sectional view of a bracket of an AC servomotor according to an embodiment of the present invention.

FIG. 3 is a sectional view of a conventional AC servo motor.

FIG. 4 is a sectional view of a bracket of a conventional AC servo motor.

[Explanation of symbols]

 11,31 Encoder 12,32 Bracket B 13,35 Bearing B 14,33 Stator 15,34 Bracket A 16,38 Bearing A 17,39 Rotor 36 Holding plate Set screw 37 Holding plate

Claims (1)

[Scope of utility model registration request] 1. A rotor, a stator, and a bracket for holding the rotor, wherein a plurality of or continuous protrusions are provided on an end surface of the bracket on the bearing insertion side, and after inserting an outer ring of a ball bearing of the rotor, a caulk is formed. An AC servomotor that is characterized by