JPS5828022A - Rotor of electromagnetic clutch - Google Patents

Abstract

PURPOSE:To obtain dimensional constitution of an electromagnetic clutch and form the clutch to small weight, by equipping an electromagnet to a rotor external cylinder part, providing a gap between the rotor external cylinder part and a rotor internal cylinder part and arranging a good magnetic bar material. CONSTITUTION:Segments 8, 9 are formed by applying bending work normally to a soft steel wire rod of low carbon, annealed iron wire, etc. through a bender, forming machine or metal molding and the like. The segments 8, 9 are circumferentially arranged on a plain and integrally secured to an internal cylinder part 4 and external cylinder part 5 of a rotor by welding or securing material. In this way, the segments 8, 9 are combined with a magnetic path shuttling in an armature, while a space part, provided between the internal and external cylinder parts 4, 5, performs shielding of magnetic passing.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a configuration of a friction surface of a rotor of an electromagnetic clutch that faces the armature.

Conventionally, as this type of electromagnetic clutch, there is one shown in FIG. In Fig. 1, when external power is being transmitted from the V-groove P, energization of the electromagnet M causes
A magnetic path 3 is formed in the rotor 1 and a clutch plate 2 disposed opposite to the rotor 1, and the end face of the rotor 1 and the clutch plate 2 are frictionally coupled and rotate together.

An end face portion serving as a friction surface housing was integrally formed, and a notch 7 for magnetic shielding was formed in the end face portion by punching as shown in FIG. 3.

In order to ensure the effective diameter of the friction surface and the contact area with the armature, the notch 7 needs to be punched out to a thickness equal to or less than the thickness of the plate, and the punching die must be machined very close to the inner and outer cylindrical parts, which can lead to problems such as shortened mold life and mold breakage. This has the disadvantage that punching is performed alternately, which deforms the end material between the notches and causes a deterioration in strength.

Next, in the case of the conventional example where the rotor outer cylindrical part has a structure that also serves as a groove, due to the restriction of the punching position of the notch, the rotor outer cylindrical part on the friction engagement surface is 6, and the outer diameter of the rotor inner cylinder part 4.
: It has the disadvantage that one notch must be cut out in a limited range of large dimensions.

The present invention eliminates many of the drawbacks and weaknesses present in the conventional example described in Section I. Examples of the present invention will be described below with reference to FIGS. 4 to 6.

Note that explanations of the same mechanisms, the same constituent members p, and parts that perform the same functions as those of the conventional example will be omitted.

Segment 8, 9. Usually, low-strength soft steel wire, blank iron wire, etc. are bent using a bender, a forming machine, or a mold.

The segments 8.9 may be selected from among magnetic materials with appropriate hardness depending on the frictional connection characteristics required by the clutch, or may be either one of segments 1-8 and 9 described in iff. Alternatively, both may be composed of different metals to improve wear resistance.

The segments 8 and 9 are arranged on a plane circumference and are welded or integrally fixed to the inner cylindrical part 4 and the outer cylindrical part 5 of the rotor with a fixing material, and the segments serve as a magnetic path for reciprocating the armature. , the space provided between the inner and outer cylindrical parts is responsible for shielding magnetic passage.

The embodiment shown in FIG. 5 differs from the embodiment shown in FIG. 4 in that segments 8 and 9 are made of a non-magnetic material in the space serving as the magnetic shielding part of the end face formed between the inner and outer cylindrical parts of the rotor. It has a structure in which the friction plate 10 is inserted and fixed, and is designed to increase the coupling torque without increasing the surface area of the end face.

The friction plate 1o may be constructed by directly molding a friction material such as phenol resin onto the segments 8 and 9.

In FIG. 6, the segments 1-8 and 1-9 are processed into a shape having a rectangular cross section, so that one end surface of the rotor is flattened, and the cross-sectional area of the magnetic path can be configured more effectively. In other words, even in the case of the embodiment shown in FIG. 5, which is made of a wire rod with a circular cross section, the contact portion of the stop segment with the armature is in line contact with the armature, which is cut to ensure the flatness of one end surface of the rotor. Instead, it will be face-to-face contact.

Furthermore, by using the auxiliary yoke 11 for magnetic coupling and fixation between the segments 8 and 9, it becomes possible to arbitrarily select the area, effective radius, etc. of the inner and outer contact surfaces of the armature.

Next, the effects of the present invention will be described.

The present invention is an effective means for demonstrating adaptability by standardizing the component parts of a wide variety of clutches and by providing flexibility in the design of the clutch to better suit user needs. I will explain.

In electromagnetic clutches used for automobile air conditioning, the dimensions of the V-groove body for power transmission of the electromagnetic clutch differ depending on the type of vehicle and the exhaust meter of its prime mover.

Currently, various companies are producing various sizes from 100 mm to 16,011 mm in diameter, and these are 6 base.

Currently, forging molding or press molding is performed individually using dedicated molds.

On the other hand, with the increasing demand for weight reduction as a result of the times, there is a punching process in machining the magnetic shielding notch on one end face of the rotor, as mentioned above, and the dimensional restrictions due to this have reduced the weight. This serves as a deterrent to design.

Since the rotor structure according to the present invention does not involve punching one end of the rotor, there are no restrictions on processing due to molds, and the rotor can be freely shaped according to the appropriate size distribution of the armature friction surface determined by the armature retention and support method. Magnetic configurations are possible.

Furthermore, in setting the strength corresponding to the elastic deformation due to the radial load of the rotor, it is easier to select the strength according to the angle of the segments 8 and 90 and the number of segments used, compared to the case of punching with a mold. can.

In addition, in the production of multiple models with different V-groove bodies and diameter dimensions, it is not only possible to share the configuration of the end face, but it is also possible to change the angle of the segments and combine the number of pieces used, making it easy to snap. Moreover, it is about 11T that can be done economically.

In addition, according to the present invention, the dimensional configuration that was conventionally considered difficult to process and manufacture can be made 1-1, and it is possible to exhibit a remarkable effect in reducing the amount of food eaten.

The present invention is extremely effective in that it not only improves structural construction methods but also significantly expands the range of possible construction.

[Brief explanation of drawings]

Fig. 1 is a sectional view of a conventional electromagnetic clutch, Fig. 2 is a sectional view of a part of the rotor of the electromagnetic clutch, Fig. 3 is a plan view of the same, and Fig. 4 is an embodiment of the present invention. Main parts of the rotor of the electromagnetic clutch, Figure 6 and Figure 6
Figure id: A sectional view of a main part of a rotor of an electromagnetic clutch according to another embodiment of the present invention. M... Electromagnet, P... V 77η body,
1...--Rotor, 2...-armature, 3...-magnetic path, 4...-inner cylindrical portion, 6
......Outer cylindrical part, 6...Rotor one end part, 7...-Magnetic shield rTh missing part 1s, 9...
...-Segment, 1o...Friction plate, 11...
...Auxiliary yoke. Name of agent: Patent attorney Toshio Nakao and 1 other person No. 1
Figure 2

Claims (1)

[Claims] (1) A rotor inner cylindrical part that is rotatably provided by a bearing, and a rotor outer cylinder that is provided facing each other so as to wrap around the outer periphery of this rotor inner cylindrical part and that is provided with an electromagnet between the rotor inner cylindrical part and the rotor inner cylindrical part. and a non-magnetic friction plate is inserted between the rotor inner cylinder part and the rotor outer cylinder part, and the shaft end face part of the rotor inner cylinder part and the l'Ill end face part of the rotor outer cylinder part. A rotor for an electromagnetic clutch according to claim 1.