JP3015686B2 - Air conditioner - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an air conditioner used for cooling and heating indoors, and relates to an improved structure for mounting a motor case to a support plate of a main body.

[0002]

2. Description of the Related Art Among the causes of generation of electromagnetic noise of a DC motor used in an air conditioner, vibrations due to fluctuations in pulsating torque can be cited as a main cause.

[0003] Conventionally, in mounting an air conditioner of this type, particularly a motor case in which an electric element of a DC motor for rotatingly driving a cross flow fan is mounted on a support plate of a main body, for example, screws are fixed to the support plate. The holding portions protruding from both ends of the motor case are inserted into the cylindrical insertion holes formed by burring between the pair of brackets with appropriate fastening forces via the respective cushion rings, and are attached. Some have a configuration in which vibration caused by torque fluctuation is absorbed by a cushion ring.

[0004]

However, in such a conventional mounting structure of the motor case in the air conditioner, the inner ring surface of the cushion ring is simply brought into contact with the outer peripheral surface of the holding portion of the motor case, while the bracket of the bracket is mounted. Since the inner peripheral surface of the cylindrical insertion hole comes into contact with the outer ring surface of the cushion ring, if the fastening force of the cushion ring is too weak, the motor case itself moves to rotate when the motor starts. As a result, the rotation direction is not determined, resulting in poor starting.

If the fastening force of the cushion ring is too strong, the startability is not affected, but the vibration due to the pulsating torque fluctuation propagates to the main body via the support plate, and generates a low growling sound (electromagnetic sound). There was a problem.

[0006]

SUMMARY OF THE INVENTION It is an object of the present invention to provide an air conditioner which can prevent the motor case from rotating when starting the motor even if the fastening force of the cushion ring is weak, thereby improving the startability. To provide.

[0007]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present invention is directed to a cylindrical holder at both ends of a motor case in which an electric element of a DC motor for driving a fan for an air conditioner is rotated. In the air conditioner in which the parts are supported by a pair of brackets attached to a support plate of the air conditioner body via a cushion ring, two concentric annular grooves are formed in the holding parts at both ends of the motor case. Each of the stopper members fitted into each of the annular grooves at both ends from both ends is provided with a first projection formed radially around the motor rotation axis, while the respective brackets are provided on the respective brackets. , providing the second projections formed in the axial direction of the rotary shaft of the motor, respectively, respectively, and the cushion ring, the radial direction mate with the first projection of the stopper member Groove and a second engaging groove of the second protrusion and fits fit the axial direction of the bracket is provided, the said first and second projections provided on the cushion ring
It is configured to be locked in the first and second engagement grooves.

[0008]

According to the present invention, by adopting the above structure, both ends of the motor case, in which the electric element of the DC motor is incorporated, are respectively provided between the pair of brackets attached to the support plate of the main body. , And a first projection is provided on the holding portion of the motor case, a second projection is provided on each bracket, and the first and second projections are provided on the cushion ring. Since the cushion ring is locked in the second engagement groove, rotation of the cushion ring is suppressed by locking the second protrusion of the bracket, and locking of the first protrusion provided on the motor case to the cushion ring. Accordingly, even when the motor case tries to rotate at the time of starting the motor, the rotation of the motor case is suppressed.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below in detail with reference to the drawings. FIG. 1 shows the internal structure of an air conditioner according to the present invention. It is a supporting plate to be constituted.

A cross flow fan 2 is axially supported on the support plate 1 in the left and right directions, and a DC motor 10 is provided on one side of the cross flow fan 2. The motor case 13 includes a motor case 13 having a built-in electric element 12 for rotatingly driving a rotation shaft 11 directly connected to the motor 2. The motor case 13 is provided between a pair of left and right brackets 20 and 30 screwed to the support plate 1. Cushion ring 4 made of elastic material such as rubber
It is supported and mounted via 0,40.

That is, the motor case 13 is
As shown in FIG. 4, both ends 13 in the central axis direction
a and 13b are integrally formed with cylindrical holding portions 14 and 14 projecting from each other. A first annular groove 15 is provided in a protruding base portion of each of the holding portions 14 and a second annular groove 15 is provided on an end surface 14a thereof. Annular groove 16 is formed.

A cushion ring 40 is fitted to the outer peripheral surface of each holding portion 14 of the motor case 13 in a press-fit state, and one peripheral edge of the cushion ring 40 is crushed by the first annular groove 15. As shown in FIGS. 5 and 6, the motor is mounted on the left and right outer peripheral end surfaces 40a thereof.
A plurality of first engagement grooves 41 radially formed in
The inner ring surface 40b is formed in the axial direction of the rotation shaft of the motor.
A plurality of the formed second engagement grooves 42 are provided at equal intervals in the circumferential direction.

In the drawing, reference numerals 50 and 60 denote first and second stopper members. The stopper members 50 and 60 are formed so as to protrude along both front and rear edges of the disk-shaped substrates 51 and 61. A pair of front and rear fitting pieces 52 fitted in a second annular groove 16 formed in the holding portion 14 of the thirteen in a press-fit state;
62 and radially around the rotation axis of the motor so as to be engageable with the first engagement grooves 41 of the cushion ring 40 formed on the upper and lower edges of the substrates 51 and 61.
It is composed of a pair of upper and lower projecting pieces 53, 63 formed.

The first stopper member 50 is provided on the right holding portion 1 where the rotating shaft 11 of the motor case 13 does not project.
4, the second stopper member 60 is provided on the left holding portion 14 from which the rotating shaft 11 of the motor case 13 projects.
The stopper rings 50 and 60 are fitted to the holding portions 14 and 14 of the motor case 13 so that the cushion ring 40 is attached to the holding portions 14 and 14 of the motor case 13. The first projection (projection piece 63) that can be locked in the first engagement groove 41 of the
The second stopper member 60 is provided with an insertion hole 64 through which the rotary shaft 11 can be inserted at the center of the substrate 61. I have.

On the other hand, in the drawing, reference numeral 20 denotes a first bracket for holding the right holding portion 14 from which the rotary shaft 11 of the motor case 13 does not project, and reference numeral 30 denotes a left holding portion from which the rotary shaft 11 of the motor case 13 projects. In the second bracket holding the bracket 14, each of the brackets 20, 30 is screwed to the ring-shaped substrates 21, 31 and to the support plate 1, which is formed on the rear edge of the substrates 21, 31, respectively. Mounting bases 22, 32, fastening pieces 23, 33 projecting from the outer circumference of the substrates 21, 31 along the circumferential direction, respectively, and formed at the center of the substrates 21, 31 respectively. a cylindrical fitting portion 24 and 34, respectively before and after both edges of the inner peripheral portion of the fitting portion 24, 34 Mo
And a pair of front and rear projections 25 and 35 formed in the axial direction of the rotation axis of the motor.
Are formed so as to form a second projection which can be locked in the second engagement groove 42 of the cushion ring 40.

Further, each of the fastening pieces 23 protruding from the outer peripheral portion of the substrate 21 of the first bracket 20 is provided with a screw insertion hole 23a and a positioning hole 23b, respectively, while the second insertion piece 23a and the positioning hole 23b are provided. Each fastening piece 33 protruding from the outer peripheral portion of the substrate 31 of the bracket 30 has a screw hole 3
3a and a positioning piece 33b are provided respectively, and when the two brackets 20 and 30 are fastened, the positioning holes 23
The screw insertion hole 23a and the screw hole 33a correspond to each other with high accuracy by inserting the positioning piece 33b through the hole b.

Thus, the motor case 1 in which the electric element 12 of the DC motor 10 is built in the support plate 1 of the main body described above.
First, when installing the motor case 13,
After the cushion rings 40, 40 are fitted in the holding portions 14, 14 of the motor case 13 through the cushion rings 40, 40, respectively, the first annular portions of the holding portions 14, 14 of the motor case 13 are interposed therebetween. First and second grooves 15 and 15
The first and second stopper members 5 and 60 are fitted and fixed in a press-fit state, respectively.
0, 60 of the projection pieces 53, 63 to the cushion ring 40,
The first engagement grooves 41 are engaged with the first engagement grooves 41.

Next, the cushion ring 4
Motor case 1 in which 0 and 40 are respectively fitted to the outer peripheral surface
The fitting portions 24 and 34 of the first and second brackets 20 and 30 are inserted into the two holding portions 14 and 14 in a press-fit state, respectively, and the fitting of the first and second brackets 20 and 30 is performed. Projecting pieces 25 formed on the inner peripheral portions of the portions 24 and 34,
35 to the second engagement grooves 4 of the cushion rings 40, 40.
2 and 42, the mounting bases 22, 32 of the first and second brackets 20, 30 are screwed to the support plate 1 of the main body, so that the motor to the support plate 1 of the main body is screwed. The case 13 is mounted.

[0019]

As is apparent from the above description, according to the present invention, a pair of brackets attached to a support plate of a main body is provided with a cushion ring at both ends of a motor case in which an electric element of a DC motor is incorporated. , And a first projection is provided on the holding portion of the motor case, a second projection is provided on each bracket, and the first and second projections are provided on the cushion ring. Because it is locked in the second engagement groove,
Since the rotation of the cushion ring is suppressed by the engagement of the second projection of the bracket, the engagement of the first projection provided on the motor case to the cushion ring causes the motor case to rotate when the motor starts. Also, the rotation of the motor case can be suppressed, whereby even if the fastening force of the cushion ring is weak, the rotation of the motor case at the time of starting the motor as before can be prevented. Can be enhanced.

[Brief description of the drawings]

FIG. 1 is an explanatory view of a state in which a motor case is mounted on a support plate of a main body, showing an embodiment of an air conditioner according to the present invention.

FIG. 2 is a cross-sectional view as viewed from the direction of arrows AA in FIG. 1;

FIG. 3 is a longitudinal sectional view as seen from the direction of arrows BB in FIG. 2;

FIG. 4 is an exploded perspective view showing an assembled state of the motor case.

FIG. 5 is a sectional view of the cushion ring.

FIG. 6 is a sectional view as seen from the direction of arrows CC in FIG. 3;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Main body support plate, 2 ... Cross flow fan, 10 ... DC motor, 11 ... Rotating shaft, 12 ... Electric element, 13 ... Motor case, 14, 14, ...・ Holding part, 15 ・ ・ ・ First annular groove, 16 ・ ・ ・ Second annular groove, 20 ・ ・ ・ First bracket, 21 ・ ・ ・ Substrate, 22 ・ ・ ・ Mounting base, 23 ・ ・ ・Fastening piece, 23a: screw insertion hole, 23b: positioning hole, 24: fitting portion, 25, 25: second projection (projection piece), 30: second bracket, 31 ... board, 32 ... mounting base, 33 ... fastening piece, 33a ... screw hole, 33b ... positioning piece, 34 ... fitting part, 35, 35 ... second Projections (projection pieces), 40: cushion ring, 41: first engagement groove, 42: second engagement groove 50: first stopper member, 51: substrate, 52, 52: fitting piece, 53, 53: first projection (projection piece), 60: first stopper member , 61 ... board, 62, 62 ... fitting piece, 63, 63 ... first projection (projection piece), 64 ... insertion hole.

──────────────────────────────────────────────────続 き Continuation of front page (72) Inventor Kazuhide Uchida 2-5-5 Keihanhondori, Moriguchi-shi, Osaka Sanyo Electric Co., Ltd. (56) References JP-A-4-139327 (JP, A) 56-134523 (JP, U) (58) Fields investigated (Int. Cl. ⁷ , DB name) F24F 1/00

Claims (1)

(57) [Claims] 1. A cylindrical case in which both ends of a motor case in which an electric element of a DC motor for driving a fan for an air conditioner is driven is mounted on a pair of brackets attached to a support plate of an air conditioner body. In the air conditioner supported via a cushion ring, two concentric annular grooves are formed in the holding portions at both ends of the motor case, respectively, and each of the annular grooves at both ends is fitted from one of both ends. Each of the stopper members is provided with a first projection formed radially about the motor rotation axis, while each of the brackets is provided with a second projection formed in the axial direction of the motor rotation axis. provided with projections, respectively, and the cushion ring, mate with second projections of the first engaging groove and the bracket protrusion and fits fit radial stopper member Jikukokorokata The second engagement groove is provided, an air conditioner, characterized in that said first and second protrusions to engage with the first and second engagement groove provided in the cushion ring.