JPH0529282U - Brushless resolver mounting structure - Google Patents

Abstract

(57) [Abstract] [Object] The present invention relates to a brushless resolver mounting structure, and in particular, by shortening the overall length of the motor by bringing the resolver case into contact with a bearing provided on the motor flange, It is characterized by improving the coupling accuracy. [Structure] The brushless resolver mounting structure according to the present invention includes a resolver case (10) provided on a motor flange (2) and in contact with the bearing (4), and a motor shaft (6) provided on the bearing (4). It is composed of a resolver shaft (13) directly connected.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a brushless resolver mounting structure, and in particular, a novel method for shortening the overall length of a motor and improving the coupling accuracy between the motor and the resolver by bringing the resolver case into contact with a bearing provided on the motor flange. Regarding improvement.

[0002]

[Prior Art]

 As a conventional brushless resolver mounting structure of this type, for example, in the case of a motor with a rotation detector using an encoder, there is a structure disclosed in Japanese Patent Laid-Open No. 1-55041, which is the same as this structure. As a configuration using a resolver in the configuration, the configuration manufactured by the present applicant shown in FIG. 2 can be mentioned.

A reference numeral 1 in FIG. 2 is a cup-shaped motor case, and a motor flange 2 is attached to an opening 1 a of the motor case 1. The front lid 1b of the motor case 1 and the motor flange 2 are provided with a pair of bearings 3 and 4, and between these bearings 3 and 4, a motor shaft 6 having a rotor 5 is rotatably provided. ing.

A stator 7 having a stator winding 7 a is provided on the inner surface of the motor case 1, and a resolver case 10 having a resolver stator 8 and a stator transformer 9 is provided on the motor flange 2. An extension shaft 6a of the motor shaft 6 penetrates the motor flange 2 and is located inside the resolver case 10, and a hollow resolver shaft 13 having a resolver rotor 11 and a rotor transformer 12 is provided on the extension shaft 6. It is fitted.

[0005]

[Problems to be solved by the device]

 Since the conventional brushless resolver mounting structure is configured as described above, the following problems exist. In other words, the bearing provided on the motor flange and the resolver case were not directly connected to each other and were separated from each other, so that the total length was long and it was impossible to shorten the axis of this type of motor. Further, since the spigot part is formed on the motor flange to connect the resolver case, it is extremely difficult to improve the accuracy of connection between the motor and the resolver at the time of connection.

The present invention has been made to solve the above problems, and in particular, by contacting a resolver case with a bearing provided on a motor flange, the overall length of the motor can be shortened and An object of the present invention is to provide a brushless resolver mounting structure that improves the accuracy of coupling with a resolver.

[0007]

[Means for Solving the Problems]

 The brushless resolver mounting structure according to the present invention includes a motor shaft rotatably provided on a motor flange via a bearing, a resolver case provided on the motor flange and in contact with the bearing, and a resolver case. The resolver includes a resolver stator and a stator transformer provided, and a resolver shaft having a resolver rotor and a rotor transformer directly connected to the motor shaft.

More specifically, the resolver shaft is connected to the inner ring of the bearing.

[0009]

[Action]

 In the brushless resolver mounting structure according to the present invention, since the resolver case is provided directly in contact with the bearing provided from the motor flange, the distance between the resolver case and the motor flange is greatly shortened, and this type of motor The total length can be shortened.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A preferred embodiment of a brushless resolver mounting structure according to the present invention will be described in detail below with reference to the drawings. It should be noted that the same or equivalent portions as those of the conventional example will be described using the same reference numerals. FIG. 1 is a sectional view showing a brushless resolver mounting structure according to the present invention.

A reference numeral 2 in the drawing is a motor flange, and a bearing 4 is provided on an inner surface 2 a of the motor flange 2. The inner ring 4a of the bearing 4 is fitted and positioned in the outer peripheral step portion 20 of the motor shaft 6, and the motor shaft 6 is provided on the motor flange 2 via the bearing 4.

A cylindrical resolver case 10 is directly provided on the motor flange 2 via a mounting bolt 21, and a ring-shaped recess 10 a formed in the lower portion of the resolver case 10 is provided on the bearing 4. The bearing 4 is fitted to the outer ring 4b and is positioned by being biased from above by the resolver case 10.

On the inner surface 10a of the resolver case 10, a resolver stator 8 having a resolver stator winding 8a and a stator transformer 9 having a stator transformer winding 9a are provided in series.

A resolver shaft 13 is provided on an end surface 6 a of the motor shaft 6, and a fixing bolt 22 penetrating the resolver shaft 13 in the axial direction is screwed into a screw hole 6 b formed in the motor shaft 6. As a result, the motor shaft 6 and the resolver shaft 13 are integrally connected in series.

A resolver rotor 11 having a resolver rotor winding 11 a and a transformer rotor 12 having a rotor transformer winding 12 a are provided on the outer circumference of the resolver shaft 13.

[0016]

EFFECTS OF THE INVENTION Since the brushless resolver mounting structure according to the present invention is configured as described above, the following effects can be obtained. That is, since the resolver case is directly coupled to the bearing provided on the motor flange, the total length of this type of motor with detector can be significantly shortened. Further, it is not necessary to form a spigot for a resolver on the motor flange, and the structure can be simplified. In addition, the conventional hollow shaft type resolver requires precise dimensions for the shaft inner diameter and the hollow shaft, but with the configuration of the present invention, it is only necessary to control the outer diameter of the shaft, and manufacturing is greatly facilitated.

[Brief description of drawings]

FIG. 1 is a sectional view showing a brushless resolver mounting structure according to the present invention.

FIG. 2 is a sectional view showing a conventional brushless resolver mounting structure.

[Explanation of symbols]

 1 Motor Flange 4 Bearing 4a Inner Ring 6 Motor Shaft 8 Resolver Stator 9 Stator Transformer 10 Resolver Case 11 Resolver Rotor 12 Rotor Transformer 13 Resolver Shaft

Claims (2)

[Scope of utility model registration request] 1. A motor shaft (6) rotatably provided on a motor flange (2) via a bearing (4), and a motor shaft (6) provided on the motor flange (2) in contact with the bearing (4). A resolver case (10) provided, a resolver stator (8) and a stator transformer (9) provided in the resolver case (10), a resolver rotor (11) and a rotor transformer directly connected to the motor shaft (6). A brushless resolver mounting structure having a structure including a resolver shaft (13) having (12). 2. The brushless resolver mounting structure according to claim 1, wherein the resolver shaft (13) is connected to an inner ring (4a) of the bearing (4).