JPS5829305Y2 - Denji Kuratsuchi - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an electromagnetic clutch that transmits driving force to a refrigerant compressor of an air conditioner of an automobile, for example.

Conventionally, these electromagnetic clutches are as shown in FIGS. 1 and 2, in which a V-pulley 1 to which rotational force is transmitted by a belt (not shown) is rotatably supported by a support member 3 by a bearing 2. A magnetism generating section 4 is arranged so as to be wrapped around the pulley 1. When the magnetism generating section 4 is excited, it magnetizes the V pulley 1 and attracts the clutch plate 5 described below.

The clutch plate 5 is disposed opposite to the disc portion 1a of the V-pulley 1 with a gap (clutch gap).
is fixed to three ring dampers 7 by rivets 6 and supported by the ring dampers 7.

This ring damper 7 has a stopper plate 1 attached to a hub 9 whose other end is fixed to a rotating shaft 8 of a compressor (not shown).
1 and are fixed together with rivets 10.

In the electromagnetic clutch having such a configuration, three ring dampers 7 are used as described above, so if the warpage of each ring damper 7 is uneven, the clutch plate 5
The clutch gap between the ring damper and the V-pulley 1 may become inappropriate. Also, during use, a force such as A shown in Fig. 2 is applied to the ring damper 7 every time it is turned on and off. There are problems such as rivets 6 and 10 coming loose.

Therefore, in order to solve these problems, the present invention uses an elastic plate having a large number of curved and radially extending ribs instead of the conventional ring damper to attach one clutch plate to the driven rotating shaft. This is how it was done.

Next, the present invention will be explained with reference to the drawings.

In FIG. 3, the plate 12 is made of an elastic member, and has a plurality of rivet holes 13 for fixing the clutch plate at the outer peripheral end, and a hub insertion hole 14 in the center. Rivet holes 15 are formed around the periphery for fixing to a plurality of hubs.

The through hole 11 is formed to correspond to the rubber damper 20 fixed at a fixed angle near the periphery of the stopper plate 110 shown in FIG. The clutch plate 5 is brought into contact with the surface of the plate 5 on the side opposite to the V-pulley to restrict the position of the clutch plate 5 which is biased toward the side opposite to the V-pulley by the plate plate 12.

Furthermore, there is a curve between the circle connecting the rivet holes 13 for fixing the clutch plate, that is, the pitch circle of the rivet hole 13, and the circle connecting the rivet hole 15 for fixing the clutch plate to the hub, that is, the pitch circle of the rivet hole 15. A large number of 19 elongated grooves extending radially are formed.

Therefore, the circle connecting the rivet holes 13 and the circle connecting the rivet holes 15 of the plate 12 are connected by a large number of curved and radially extending lips 16, which are the portions of the plate 120 left after the formation of the long grooves 19. There will be.

As shown in FIG. 4, this lip 16 has a long groove 19 on one side.
A blade 18 is provided which is cut and bent during molding, and when rotated, the blade 18 acts as a fan to cool the clutch plate.

The plate 12 described above is assembled into an electromagnetic clutch as shown in FIG.
Both the plate 12 and the stopper plate 11 are fixed to a bar 9 fixed to the rotating shaft 8 by a rivet 10.

The structure of the clutch plate 5 is similar to the conventional one shown in FIGS. 1 and 2.

Further, the stopper plate 11 in the above embodiment is used to assist in regulating the amount of movement of the clutch plate 5 in order to prevent vibration of the clutch plate 5, etc., and the plate 12 causes the clutch plate 5 to move toward the side opposite to the V-pulley. It is not necessary to provide it when it is sufficient to support the clutch plate 5 with the plate 12, such as when the clutch plate 5 is not energized.

Furthermore, in the above embodiment, the vane 18 is
It is formed on the stopper plate 11 side of No. 2, and
① It is located on the front side in the rotational direction of the pulley 1 as indicated by arrow B in FIG. 5, and cooling air flows from the stopper plate 11 side so as to pass through the clutch gap.

In this case, the amount of rise of the blade 18 is also determined by a washer or the like provided on the rivet 10, and the blade 18 does not come into contact with the stopper plate 11.

However, the cooling air blown by the blade 18 may be sucked in from the clutch gap side with the back of the blade 18 as a negative pressure.
It may also be formed on the side surface (in this case, the amount of rise of the blade 18 is determined by the washer etc. provided on the rivet 9).

), or may be located on the forward side of the pulley 1 in the rotational direction.

When the electromagnetic clutch is actuated, the clutch plate 5 connects and disconnects to the disc surface of the V-pulley 1 to transmit rotational force from the V-pulley 1 to the rotating shaft 8 via the clutch plate 5. Since the many raised lips 16 are curved and extend radially, when the clutch plate 5 is attracted to the disc surface of the V-pulley 1 and sudden torque is applied to the plate 12, the lips 16 are bent in the longitudinal direction. The lip 16 curves like a spring, and can absorb the shock caused by instantaneous transmission of large torque.

Further, the blades 18 function as a fan to cool the clutch plate 5.

As mentioned above, in this invention, the lip of the plate receives the component of the rotational force in its longitudinal direction, so torque transmission is smooth, and the spring action absorbs the sudden increase in torque when the clutch is attracted. can be transmitted to the rotating shaft.

In addition, the plate can be integrally machined, improving dimensional accuracy, and since it is only necessary to use one plate for each electromagnetic clutch, the clutch gap can be easily adjusted. It is.

[Brief explanation of the drawing]

Fig. 1 is a sectional view of a conventional electromagnetic clutch, Fig. 2 is a front view of the same as above, Fig. 3 is a plan view of a plate used in the electromagnetic clutch of the present invention, and Fig. 4 is a sectional view taken along the line A-A in Fig. 3. , FIG. 5 is a front view of the present invention. 1... V pulley, 5... clutch plate,
1261. ...Pluto, 16...Rep, 1
8... Feather.

Claims (1)

[Scope of utility model registration request] In an electromagnetic clutch that controls the transmission of rotational force by connecting and disconnecting the V-pulley and clutch plate using electromagnetic force, the outer peripheral end of a single elastic plate is connected to the clutch plate, and the inner peripheral end is connected to the rotating shaft. The clutch plate and the rotating shaft are connected by connecting the clutch plate and the rotating shaft, and the rotational force is generated between the circle connecting the rivet hole in the plate that connects with one clutch plate and the circle connecting the rivet hole connecting the rotating shaft. An electromagnetic clutch characterized by having a large number of ribs that are curved and extend radially so as to receive component force in the longitudinal direction.