JP2001330059A - Electromagnetic clutch - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an electromagnetic clutch at a low cost by enlarging the compatibility of parts and using the same clutch case independently of the shape of a coil support part. SOLUTION: This electromagnetic clutch transmits or cuts off the power between a driving rotor and a driven rotor by electrifying or cutting off a clutch coil supported by a support member fitted to a case of a rotary machine by positioning. In this electromagnetic clutch, any one of the clutch coil support member and the case is provided with a positioning projection having the predetermined diameter, and the other thereof is provided with a recessed part to be fitted with the projection with a variable fitting width in the circumferential direction of a rotor. The recessed part is formed of a fitting groove with a variable width extended along the circumferential direction of the rotor or plural fitting having a different inner diameter arranged along the circumferential direction of the rotor.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a clutch interposed between an output shaft of an engine of a vehicle air conditioner and a rotary shaft (rotor) of a compressor, and an interposed space between a supercharger and an engine. Of an electromagnetic clutch that transmits or cuts off power between a driving-side rotator and a driven-side rotator by energizing and de-energizing a clutch coil supported via a support member in a case of a rotating machine. Regarding the structure.

[0002]

2. Description of the Related Art In an air conditioner for a vehicle (hereinafter referred to as a car air conditioner), power is cut off by interposing an electromagnetic clutch between an output shaft (rotor) of an engine and a rotor of a compressor. FIG. 8 shows such an electromagnetic clutch.
Japanese Patent Application Laid-Open No. 9-19 / 1990 discloses a technique for reducing the diameter of a clutch pulley
FIG. 3 is a cross-sectional view along the axis of rotation of that proposed in US Pat. No. 6088.

In FIG. 8, reference numeral 110 denotes a rotating body connected to an engine (not shown) via a belt (not shown).
A pulley groove 110 a having a plurality of pulley grooves is provided on the outer periphery of the root of the rotating body 110. Reference numeral 111 denotes a friction member which is fixed to the rotating body 110 with a bolt 112 to form a friction surface. 150 is a compressor (not shown)
A leaf spring 153 is fixed to a hub 150a fixed to a shaft end of the rotary (rotor) shaft by a bolt 152. The armature plate 1 is provided on the outer periphery of the plate spring 153.
51 is fixed, and is movable in the axial direction by the elasticity of the leaf spring 153.

A housing 140 such as a compressor supporting the clutch is formed in a cylindrical shape projecting between the outer periphery of the rotor shaft 150 and the inner periphery of the rotating body 110. A clutch bearing 120 is interposed between the outer peripheral surface of the housing 140 and the inner peripheral surface of the rotating body 110, and the rotating body 110 and the friction member 111 fixed thereto are fixed by the clutch bearing 120 to the housing. 140 rotatably supported. Reference numeral 130 denotes a coil (clutch coil) opposed to the armature plate 151. The coil 130 is connected to a coil wiring 131 led through the inside of the housing 140, and is energized through the coil wiring 131. Has become.

In such an electromagnetic clutch, the rotational force of the engine is transmitted to the rotating body 110 via a V-belt (not shown) provided on a pulley groove 110a of the rotating body 110, and the rotating body 110 It is supported by the housing 140 and rotated. And
When the coil 130 is energized through the coil wiring 131, the armature plate 151 is attracted to the friction member 111 by an electromagnetic force (attraction force) generated in the coil 130, and the rotational force of the rotating body 110 is reduced by the friction member. 111, a hub 150 through an armature plate 151 and a leaf spring 153.
a to the rotor shaft 150 to rotate the compressor.

[0006]

In the electromagnetic clutch shown in FIG. 8, no moment is generated on the clutch bearing 120 side, and the life of the clutch bearing 120 can be maintained long even if the pulley groove 110a has a small diameter. The rotating body 110 in which the pulley groove 110a is formed
And the friction member 111 are manufactured as separate members, and the bolt 1
The connection by 12 increases the complexity of the structure and the number of parts. Further, in such an electromagnetic clutch, the coil 130 includes the rotating body 110 and the friction member 111.
Since the coil wiring 131 is provided in a form surrounded by the inside, the wiring for taking out the coil wiring 131 to the outside is complicated and the number of assembling steps is increased.

As a technique for solving the above problems, the present applicant has proposed the invention of Japanese Patent Application No. 11-250992. In this invention, the rotating body supported at the end of the housing via the bearing is integrated with the pulley groove located outside the bearing and the friction plate provided on the rotating body and connected to and detached from the driven plate. The coil supported by the coil supporting portion is fitted into a U-shaped concave portion opened toward the pulley groove side, and the coil provided on the housing is disposed on the back of the friction plate portion. The coil is supported by a support extending from the housing through a space that does not interfere with the belt outside the pulley groove. According to the invention, since the coil is supported by the housing via the support portion provided at a circumferential position which does not interfere with the belt for driving the rotating body, the rotating body is formed in the pulley groove for the belt. And the friction plate part can be integrated into a single member, and the number of parts is smaller than that of a conventional method in which the rotating body and the friction member are manufactured separately and connected by bolts. In addition to the reduction, the joining operation by bolts is not required.

In this invention, as described above, the coil supported by the housing, that is, the coil supporting portion, is disposed at the back of the friction plate portion, and the coil is not interfered with the belt outside the pulley groove from the coil supporting portion. It is configured to be supported by a support portion extending through the hole. However, in a vehicle equipped with such an electromagnetic clutch, the position of the belt over the pulley groove, that is, the direction in which the belt is pulled out from the pulley groove differs depending on the type of vehicle. For this reason, in the vehicle using the electromagnetic clutch according to the invention, it is necessary to position the coil support portion for each vehicle type so that the coil support portion for supporting the coil does not interfere with the belt suspended in the pulley groove. However, the shape of the front case of the clutch supporting the coil supporting portion varies depending on the type of vehicle, so that the compatibility of parts is lost and the cost of the electromagnetic clutch increases.

The present invention has been made in view of the problems of the prior art,
The same clutch case can be used without being affected by the shape of the coil support, expanding the compatibility of parts,
It is an object of the present invention to provide an electromagnetic clutch with reduced device cost.

[0010]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present invention provides an electric vehicle comprising: a motor for energizing a clutch coil supported by a support member positioned and attached to a case of a rotary machine; In an electromagnetic clutch for transmitting or interrupting power between the driving-side rotator and the driven-side rotator by disconnecting, a positioning protrusion having a predetermined diameter is provided on one of the support member or the case of the clutch coil, On the other hand, the present invention proposes an electromagnetic clutch in which a recess is provided in which the protrusion is fitted and the fitting width changes in the circumferential direction of the rotating body.

[0011] The invention according to claims 2 to 6 relates to a specific configuration of the recess, and in the invention according to claim 2, the recess changes the groove width along the circumferential direction of the rotating body. It is characterized by comprising a fitting groove which is extended.
And the fitting groove is preferably, as in claim 3,
It is provided continuously over a range of 360 degrees in the circumferential direction of the rotating body. Alternatively, as in claim 4, a plurality of the rotary members are provided intermittently in a range of 360 degrees in the circumferential direction of the rotating body. Claim 5
The invention according to claim 1 is characterized in that, in the first aspect, the concave portion is formed of a plurality of fitting holes having different inner diameters provided along a circumferential direction of the rotating body. The fitting holes are preferably provided at equal intervals along the circumferential direction of the rotating body.

According to this invention, by changing the outer diameter of the positioning projection for each model of the electromagnetic clutch, when the projection is fitted into the recess without any gap, the clutch coil supporting member can transmit power such as a belt. An outer diameter that does not interfere with the members can be set, and in one case, various types of electromagnetic clutches can be used without performing additional processing of the fitting portion of the protrusion. In addition, the relative movement in the circumferential direction is locked by fitting the protrusion into the concave portion, and the function of preventing the coil support member from rotating around the case can be achieved.

Therefore, according to the invention, the outer diameter of the positioning projection is changed for each model of the electromagnetic clutch so that the coil supporting member is located at the circumferential position of the recess so as not to interfere with the transmission member such as the belt. By setting the outer diameters of the corresponding projections, various types of electromagnetic clutches can be used in one type of case. It is not necessary to manufacture a case for each vehicle type, the compatibility of the case is expanded, and the cost of the device is reduced.

According to the fifth aspect of the present invention, since the columnar projection is fitted into the fitting hole, the projection and the fitting hole are fitted without any displacement, and the coil is formed. The position of the support member with respect to the case is set and the rotation is reliably prevented.

[0015]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below in detail with reference to an embodiment shown in the drawings. However, the dimensions, materials, shapes, relative arrangements, and the like of the components described in this embodiment are not merely intended to limit the scope of the present invention, but are merely illustrative examples unless otherwise specified. Absent.

FIG. 1 is a cross-sectional view of a main part along a rotation axis showing a first embodiment of an electromagnetic clutch for a vehicle air conditioner according to the present invention.
FIG. 2 is a side view of the coil fixing member. FIG.
FIG. 4 is a view taken along the line AA of FIG. 1 showing a first example of the fitting recess in the embodiment, and FIG. 4 shows a second example of the fitting recess. FIG. 5 is a cross-sectional view of a main part along a rotation axis showing a second embodiment of the electromagnetic clutch. FIG. 6 is a view of a first example of a fitting recess in the second embodiment, and FIG. 7 is a view taken along the line CC of FIG.

In FIG. 1 and FIG. 2, reference numeral 10 denotes a rotary member formed in a cylindrical shape. A pulley groove portion 10a having a plurality of pulley grooves is formed on the outer periphery of a root portion of the rotary member 10, and the pulley groove portion 10a is formed in the pulley groove portion 10a. It is connected to an engine (not shown) via a belt 20 that is erected and is driven to rotate. Reference numeral 150 denotes a rotor shaft of a compressor for an air conditioner (not shown), and a hub portion 1 fixed to a shaft end portion thereof with a bolt 152.
A leaf spring 153 is fixed to 50a. The leaf spring 1
An armature plate 151 is fixed to the outer peripheral portion of the motor 53 and is movable in the axial direction by the elasticity of the leaf spring 153.

A front case 100 supports the clutch, and its end is formed in a cylindrical shape projecting between the outer periphery of the rotor shaft 150 and the inner periphery of the rotating body 10. A clutch bearing 120 is interposed between the outer peripheral surface of the end of the front case 100 and the inner peripheral surface of the rotating body 10 so that the rotating body 10 can rotate on the front case 100 by the clutch bearing 120. It has become supported. The clutch bearing 120 and the pulley groove portion 10a are disposed on the inner and outer circumferences at substantially the same position in the axial direction, so that a moment due to a driving force via the belt 20 is not applied to the bearing 120.

At the end of the rotating body 10, a U-shaped storage section 10 having the side opposite to the armature plate 151 opened in the axial direction is provided.
b is formed, and a friction plate portion 1 made to be able to contact the armature plate 151 is provided on the back side of the concave portion 10b.
1 is formed. Therefore, as shown in FIG.
The rotating body 10 is composed of a single component in which a pulley groove 10a on which the belt 20 is laid, a storage portion 10b in which the coil 130 is fitted, and a friction plate portion 11 are integrated.

Reference numeral 30 denotes a coil fixing member which is fixedly inserted on the outer periphery of the front case 100. Reference numeral 31 denotes a stop ring for regulating the axial movement of the coil fixing member 30. As shown in FIG. 2, the coil fixing member 30 is disposed in a disk portion 30 c that is pressed into the front case 100 and in a storage portion 10 b at an outer peripheral end of the rotating body 10 so that the coil 130 is Coil support portion 30a to be fitted
And a connecting portion 30b for connecting the coil supporting portion 30a and the disk portion 30c. And, the connecting portion 30b
In order to avoid interference with the belt 20, in the circumferential direction thereof, a width B
And is partially formed. Therefore, the coil 130 is attached to the annular coil support portion 30a, and is supported in a cantilever manner on the disk portion 30c pressed into the front case 100 via the arc-shaped connecting portion 30b having the width B. It will be.

In the electromagnetic clutch having the above structure, the rotational force of the engine is controlled by the pulley groove 10a of the rotating body 10.
Rotating body 10 via a V-belt (not shown)
The rotating body 10 is supported by the housing 140 via the bearing 120 and is rotated. When the coil 130 is energized, the coil 130
Armature plate 15 by the electromagnetic force (attraction force)
1 is attracted to the friction plate portion 11. Thus, the rotational force of the rotating body 10 is transferred from the friction plate 11 to the armature plate 1.
51 to the leaf spring 153 and the hub 150
The rotation of the compressor is transmitted to the rotor shaft 150 via a.

The above arrangement is described in Japanese Patent Application No. 11-2509.
It is the same as the invention of No. 92. In the present invention, the connection between the coil fixing member 30 supporting the coil 130 and the front case 100 is improved. That is, in FIG. 1, reference numeral 200 denotes a rotation-preventing projection protrudingly provided on an end surface on the front case 100 side of the disk portion 30 c constituting the coil fixing member 30. The projection 200 is formed in a columnar shape having a predetermined diameter as described later. 21
Reference numeral 0 denotes a fitting groove formed in the end face of the front case 100 on the clutch side. As shown in FIG. 3, the fitting groove 210 is formed so as to be continuous in the circumferential direction of the front case 100 and to have a continuously changing groove width in the circumferential direction. In this example, the groove width increases clockwise, but the groove width may increase counterclockwise.

On the other hand, when the projection 200 provided on the coil fixing member 30 is fitted into the fitting groove 210 without a gap, the projection 200 is connected to the coil fixing member 30 having a width B as shown in FIG. The portion 30b is provided in the pulley groove 10
The outside diameter is set so as not to interfere with the belt 20 installed on the belt 20a. Therefore, as shown in FIG.
When manufacturing the electromagnetic clutch, if the outer diameter of the protrusion 200 is set to an outer diameter corresponding to a range in which the connecting portion 30b does not interfere with the belt 20 for each electromagnetic clutch, the coil fixing member 30 can be formed. When assembled to the front case 100, the outer periphery of the projection 200 is fitted into the fitting groove 210 without a gap, so that the coil fixing member 30 does not interfere with the connecting portion 30b of the belt 20,
It can be fixed to the front case 100.

Thus, as shown in FIG. 3, by changing the outer diameter of the projection 200 for each type of electromagnetic clutch,
When the projection 200 is fitted into the fitting groove 210 without a gap, the outer diameter at which the connecting portion 30b of the coil fixing member 30 does not interfere with the belt 20 can be set. Many types of electromagnetic clutches can be used without performing additional processing of the 200 fitting portions. Further, by fitting the protrusion 200 into the fitting groove 210 whose groove width changes continuously, the movement in the circumferential direction is locked, and the function of preventing the coil fixing member 30 from rotating with respect to the front case 100. Can be done.

Therefore, according to this embodiment, the outer diameter of the projection 200 is changed for each type of electromagnetic clutch so that the connecting groove 30 b of the coil fixing member 30 does not interfere with the belt 20. By setting the outer diameter of the projection 200 corresponding to the circumferential position of the front case 100, various types of electromagnetic clutches can be used for one type of front case 100. It is not necessary to manufacture the front case 100 for each vehicle type in order to position the front case 100 and the front case 100, and the compatibility of the front case 100 is expanded.

FIG. 4 shows a second example of a connecting portion between the coil fixing member 30 and the front case 100. In this example, fitting holes having different diameters along the circumferential direction are formed in the front case 100. A plurality of 211s are provided.
Further, similarly to the above-described example, when the cylindrical projection 200 provided on the coil fixing member 30 is fitted into the fitting hole 211, the coil fixing member having a width B as shown in FIG. 30 is connected to the pulley groove 10
The outer diameter is set so as to correspond to a range that does not interfere with the belt 20 laid on a.

According to this embodiment, when the electromagnetic clutch is manufactured, the outer diameter of the projection 200 is determined for each electromagnetic clutch.
By setting the outer diameter to correspond to a range in which the connecting portion 30b does not interfere with the belt 20, when the coil fixing member 30 is assembled to the front case 100, the protrusion 200 is moved around the circumference of the front case 100. From the fitting holes 211 having different diameters, a plurality of which are formed along the direction,
By fitting into the fitting hole 211 matching the outer diameter of the projection 200, the coil fixing member 30 is
b can be fixed to the front case 100 without interfering with the belt 20. In this embodiment, since the cylindrical projection 200 on the coil fixing member 30 side is fitted into the fitting hole 211 on the front case 100 side, the projection 200 and the fitting hole 211 may be misaligned. Therefore, the position of the coil fixing member 30 is set and the rotation is reliably prevented.

In the second embodiment shown in FIGS. 5 to 7, a cylindrical projection 201 is provided on the front case 100 side.
And a fitting groove 212 or a fitting hole 213 is provided on the coil fixing member 30 side. That is, in FIG.
01 is a coil fixing member 30 of the front case 100
These are rotation-preventing projections protruding from the side end surfaces. The protrusion 2
Numeral 01 is formed in a columnar shape set to a predetermined diameter.
FIG. 6 shows a first example of a connection portion between the coil fixing member 30 and the front case 100 in the second embodiment. In this example, the protrusion 201 is provided on an end surface of the disk portion 30c of the coil fixing member 30 on the front case 100 side. The fitting groove 212 into which is fitted is recessed. As shown in FIG. 6, the fitting groove 212 is formed so that the groove width changes intermittently at regular intervals along the circumferential direction of the disk portion 30c and continuously changes in the circumferential direction. Have been. In this example, the groove width increases clockwise, but the groove width may increase counterclockwise.

On the other hand, when the projection 201 provided on the front case 100 is fitted in the fitting groove 212 without a gap, the connecting portion of the coil fixing member 30 having a width B as shown in FIG. 30b is the pulley groove 1
The outer diameter is set to correspond to a range that does not interfere with the belt 20 erected at 0a. Accordingly, as shown in FIG. 6, when manufacturing the electromagnetic clutch, the outer diameter of the protrusion 201 is set to an outer diameter corresponding to a range where the connecting portion 30b does not interfere with the belt 20 for each electromagnetic clutch. If this is done, the coil fixing member 30 is attached to the front case 10.
0, the outer periphery of the projection 201 is
By tightly fitting the coil fixing member 12 to the front case 100, the coil fixing member 30 can be fixed to the front case 100 without the connecting portion 30 b interfering with the belt 20.

As a result, as shown in FIG. 6, by changing the outer diameter of the projection 201 for each type of electromagnetic clutch,
When the protrusion 201 is fitted into the fitting groove 212 without a gap, the outer diameter of the connecting portion 30b of the coil fixing member 30 so as not to interfere with the belt 20 can be set. Many types of electromagnetic clutches can be used without additional processing of the fitting portion 201. Further, by fitting the protrusion 201 into the fitting groove 212 having a continuously changing groove width, the movement in the circumferential direction is locked, and the function of preventing the coil fixing member 30 from rotating with respect to the front case 100. Can be done.

A second example of the connecting portion between the coil fixing member 30 and the front case 100 shown in FIG. 7 corresponds to the second example of FIG. 4 in the first embodiment. A plurality of fitting holes 213 having different diameters are formed in the disk portion 30c along the circumferential direction. Further, similarly to the above example, when the columnar projection 201 provided on the front case 100 is fitted into the fitting hole 212, the coil fixing member 30 having a width B as shown in FIG. Of the pulley groove 10
The outer diameter is set so as to correspond to a range that does not interfere with the belt 20 laid on a.

According to the second example, when the electromagnetic clutch is manufactured, the outer diameter of the projection 201 is changed for each electromagnetic clutch.
If the outer diameter corresponding to the range in which the connecting portion 30b does not interfere with the belt 20 is set, when the coil fixing member 30 is assembled to the front case 100, the protrusion 201 is moved in the circumferential direction of the front case 100. By fitting a plurality of fitting holes 213 formed in different diameters along the fitting hole 213 corresponding to the outer diameter of the projection 201, the coil fixing member 30 is connected to the connecting portion 30b.
Without interfering with the belt 20
00 can be fixed.

[0033]

As described above, according to the present invention, the outer diameter of the positioning projection is changed for each type of electromagnetic clutch so that the coil supporting member does not interfere with the transmission member such as a belt. By setting the outer diameter of the protrusion corresponding to the circumferential position, various types of electromagnetic clutches can be used for one type of case, and the positioning of the coil support member and the case for each vehicle type as in the conventional case. Therefore, it is not necessary to manufacture the case for each type of vehicle, the compatibility of the case is expanded, and the cost of the device is reduced.

According to the fifth and sixth aspects of the present invention, the cylindrical projection is fitted into the fitting hole.
The protrusion and the fitting hole are fitted without causing any displacement, so that the position of the coil supporting member with respect to the case is set and the rotation is reliably prevented.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view of a main part along a rotation axis showing a first embodiment of an electromagnetic clutch for a vehicle air conditioner according to the present invention.

FIG. 2 is a side view of the coil fixing member according to the first embodiment.

FIG. 3 is a view taken along line AA of FIG. 1, showing a first example of a fitting recess in the first embodiment.

FIG. 4 is a view taken on line AA of FIG. 1, showing a second example of the fitting concave portion in the first embodiment.

FIG. 5 is a cross-sectional view of a main part along a rotation axis showing a second embodiment of the electromagnetic clutch.

FIG. 6 is a view showing a first example of a fitting recess in the second embodiment, as viewed from the direction of arrows CC in FIG. 5;

FIG. 7 is a view taken along the line CC of FIG. 5, showing a second example of the fitting recess in the second embodiment.

FIG. 8 is a diagram corresponding to FIG. 1 showing a conventional technique.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Rotating body 10a Pulley groove part 10b Storage part 11 Friction plate part 20 Belt 30 Coil fixing member 30a Coil support part 30b Connecting part 30c Disk part 100 Front case 120 Bearing 150 Rotor shaft 150a Hub part 151 Armature plate 152 Bolt 153 Plate spring 200 , 201 Projection 210, 212 Fitting groove 211, 213 Fitting hole

Claims (6)

[Claims] An energization of a clutch coil supported by a support member positioned and attached to a case of a rotary machine,
In an electromagnetic clutch for transmitting or interrupting power between the driving-side rotator and the driven-side rotator by disconnecting, a positioning protrusion having a predetermined diameter is provided on one of the support member or the case of the clutch coil, The other side is provided with a concave portion in which the protrusion is fitted and whose fitting width changes in the circumferential direction of the rotating body. 2. The electromagnetic clutch according to claim 1, wherein the concave portion is formed by a fitting groove that is extended along a circumferential direction of the rotating body while changing a groove width. 3. The electromagnetic clutch according to claim 2, wherein the fitting groove is provided continuously in a range of 360 degrees in a circumferential direction of the rotating body. 4. The electromagnetic clutch according to claim 2, wherein a plurality of the fitting grooves are provided intermittently within a range of 360 degrees in a circumferential direction of the rotating body. 5. The electromagnetic clutch according to claim 1, wherein the recess comprises a plurality of fitting holes having different inner diameters arranged along a circumferential direction of the rotating body. 6. The electromagnetic clutch according to claim 5, wherein the fitting holes are provided at equal intervals along a circumferential direction of the rotating body.