JP3205193B2 - Cooling mechanism of electromagnetic coupling device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electromagnetic coupling device used for transmitting torque of industrial equipment and vehicles.

[0002]

2. Description of the Related Art Conventional examples and embodiments of the present invention are described below.
A coil rotating type magnetic particle type electromagnetic clutch as an electromagnetic coupling device will be described. FIG. 6 is a front view showing a conventional coil rotating type magnetic particle type electromagnetic clutch, and FIG.
It is a line sectional view. In the figure, reference numerals 1 and 2 denote a pair of inner and outer drive rotors which are integrally fixed by press-fitting or the like and are a first connection main body. A ring-shaped concave portion 2b is formed at the center of the drive rotor 2. In addition, a mounting screw hole 1a is formed in a side portion of the other driving rotor 1. Reference numeral 3 denotes an exciting coil fitted in the annular concave portion 2b of the driving rotor 2, and is wound around a semicircular bobbin 6 formed of a synthetic resin, and the bobbin 6 has a pair of flanges 6a ( Only one of them is shown), and a terminal block 6b (only one is shown) is integrally formed outside thereof. Bobbin 6 and coil 3
Are fixed by a resin 5 filling the outer space 4 in the concave portion 2b of the driving rotor 2, and the terminal block 6b is arranged in a state that the tip of the female screw is slightly exposed outside the surface of the driving rotor 2. Have been. Reference numeral 8 denotes a driven rotor serving as a second connection main body, which has an annular gap g between itself and the driving rotor 2, and magnetic particles 7 are sealed in the annular gap g.
Reference numeral 9 denotes a driven shaft to which the driven rotor 8 is fixed by welding, and a shaft (not shown) is fixed. Reference numeral 10 denotes a bracket fixed to the side of one of the driving rotors 2 with screws 12, and a bearing 11 is pressed and fixed between the bracket 10 and the driven shaft 9. 10a is the bracket 1
0 are cooling fins provided radially on the outer surface of the cooling fin. 13
a is a holder fixed to a side portion of the bracket 10 by a screw 15 via a fixing plate 14 to be described later, and a slip ring assembly 13 is held in the holder. Reference numeral 16 denotes the slip ring assembly 13 and one terminal block. One lead terminal 17 for electrically connecting the lead terminal 6b and the other terminal of each lead terminal 16 is a screw for attaching the other terminal to the terminal block 6b to supply electricity. Reference numeral 14 denotes a fixing plate for fixing and supporting the lead terminals 16.

Next, the operation will be described. A lead terminal 16 of the slip ring assembly 13 is supplied from a power source (not shown).
Current flows through the terminal block 6b through the
Is excited, a magnetic flux Φ is generated in a magnetic path indicated by a dotted line,
Since the magnetic particles 7 are solidified by the magnetic flux Φ, the driving rotors 1 and 2 and the driven rotor 8 are connected to each other to transmit power.

[0004]

In the above-described configuration, the operating surface 2a of the driving rotor is provided during a continuous slip operation or a frequent intermittent connection operation between the driving rotors 1, 2 and the driven rotor 8. In addition, the operating surface 8a of the driven rotor may rise to an extremely high temperature due to heat generation. Under severe operating conditions, good connection operation cannot be obtained due to problems such as surface peeling of the operating surface 2a of the driving rotor and the operating surface 8a of the driven rotor, or deterioration due to sintering of the magnetic particles 7. was there. In addition, the generated heat is stored inside the electromagnetic clutch and causes deterioration of the bearing 11 and the like.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and an excellent electromagnetic connection which can always perform a good connection operation by cooling the side surface of a driven rotor and the periphery of a bearing. The aim is to obtain a device.

[0006]

According to the present invention, there is provided an electromagnetic coupling device in which an intake hole and an exhaust hole are arranged on the inner and outer circumferences of the same side wall of a bracket, and a partition wall is provided between the intake hole and the exhaust hole. It is. Further, a fan blade is provided inside or outside near the intake hole of the bracket.

[0007]

According to the present invention, an air intake hole and an air exhaust hole for cooling are provided on the same surface of the bracket side wall, and a partition wall is provided between the air intake hole and the air exhaust hole to generate circulating cooling air between the air intake hole and the air exhaust hole. This cools the internal components. In addition, by adding a fan blade that forcibly sends outside air to the intake hole, more effective cooling can be achieved.

[0008]

【Example】

Embodiment 1 FIG. An embodiment of a coil rotating type magnetic particle type electromagnetic clutch according to the present invention will be described below with reference to the drawings. FIG.
1 is a front view showing a coil rotating type magnetic particle type electromagnetic clutch of the present invention, and FIG. 2 is a sectional view taken along line BB of FIG. 3 is a front view of the bracket 10 viewed from the inside, FIG. 4 is a cross-sectional view taken along the line CC in FIG. 1, and FIG. 5 is an enlarged view of a portion D in FIG. In the drawing, the same or corresponding parts as those of the above-described conventional device are denoted by the same reference numerals, and description thereof will be omitted. 10 is one rotor member 2
Are fixed by screws 12 to the sides of the bracket, and are rotatably supported by bearings 11 provided on the driven shaft 9. A plurality of brackets 10 b are disposed on the inner peripheral side of the bracket near the bearing 11. The air intake holes 10c have a plurality of exhaust holes arranged at predetermined intervals outside the air intake holes 10b, and the fan blades 10e formed integrally with the air holes 10b around the inside of the air intake holes 10b for sending cooling air. Is provided outside between the intake hole 10b and the exhaust hole 10c,
A partition wall for preventing exhaust gas from circulating to the intake side.
Reference numeral 14 denotes a fixing plate for fixing and supporting the lead terminal 16, and also has a fan blade 14a for promoting the intake of the intake hole 10b. In the figure, the arrow E indicates the direction of rotation. The other configuration is the same as that of the above-described conventional apparatus, and the description is omitted.

Next, the operation will be described. A lead terminal 16 of the slip ring assembly 13 is supplied from a power source (not shown).
When the exciting coil 3 is excited by passing a current through the terminal block 6a, a magnetic flux Φ is generated in a magnetic path indicated by a dotted line, and the magnetic particles 7 are solidified by the magnetic flux Φ. The driving rotor 8 is connected to perform power transmission. At this time, the operating surface 8a becomes a heat source due to friction at the time of sliding. However, the cooling air f generated by the intake hole 10b, the exhaust hole 10c, and the fan blade 10d provided in the bracket 10 causes the side surface 8b of the driven rotor. Thus, the operation surface 8a can be indirectly cooled.

The above description has been made of the coil-coupling type magnetic particle type electromagnetic coupling device. However, the present invention can be applied to a hysteresis type eddy current, a friction type, etc. other than the magnetic particle type, and the same effects can be obtained.

[0011]

As described above, according to the present invention, it is possible to effectively cool the inside by the circulating cooling air generated by the intake and exhaust holes provided on the same surface of the bracket side wall and the fan blade. An excellent electromagnetic coupling device that operates stably even in a severe use environment can be provided. Further, the present invention is effective as an effective cooling means in a structure in which a cooling air flow path penetrating in the axial direction cannot be secured.

Furthermore, even when the driving rotary shaft and the driven rotor are connected and rotating by the fan provided on the fixed plate of the slip ring assembly, an excellent cooling air can be blown into the inside. An electromagnetic coupling device can be provided.

[Brief description of the drawings]

FIG. 1 is a front view showing an embodiment of the present invention.

FIG. 2 is a sectional view taken along line BB in FIG.

FIG. 3 is a front view of the bracket according to the embodiment of the present invention as viewed from the inside.

FIG. 4 is a sectional view taken along line CC in FIG. 1;

FIG. 5 is an enlarged view of a part D in FIG. 2;

FIG. 6 is a front view showing a conventional coil rotating type magnetic particle type electromagnetic clutch.

FIG. 7 is a sectional view taken along line AA in FIG.

[Explanation of symbols]

1, 2 driven rotors, 7 magnetic particles, 8 driven rotors, 9 driven shafts, 10 brackets, 10b intake holes,
10c exhaust hole, 10d fan blade, 10e bracket partition wall, 13 slip ring assembly, 1
4 Fixing plate, 14a fan blade, g annular space.

Continuation of the front page (56) References JP-A-59-126120 (JP, A) JP-A 62-25333 (JP, U) JP-A 62-128233 (JP, U) JP-A 4-50305 (JP , U) Fully open sho 59-139634 (JP, U) Fully open sho 59-139636 (JP, U) Fully open Flat 3-72126 (JP, U) Fully open 1987-680028 (JP, U) Really open 60-184437 (JP, U) Japanese Utility Model Showa 61-145128 (JP, U) (58) Field surveyed (Int. Cl. ⁷ , DB name) F16D 37/02

Claims (2)

(57) [Claims] A driven rotor fixed to a driven shaft;
A driving rotor disposed outside the driven rotor through a gap, and transmitting the rotation through magnetic particles sealed in the gap, and attached to a side portion of the driving rotor. And a bracket supported on the driven shaft
The bracket is supported on the outside of the device via a fixing plate
In electromagnetic coupling device comprising a lead terminal, as well as arranging the intake hole and an exhaust hole for cooling the inner periphery on the same side of the bracket side wall, between said intake holes and exhaust holes
A cooling mechanism for an electromagnetic coupling device, wherein a partition wall is provided outside the device . 2. The apparatus according to claim 1, wherein the bracket is located inside the device.
While forming a fan blade near the intake hole ,
On the outside of the device of the bracket, near the intake hole
The cooling mechanism for an electromagnetic coupling device according to claim 1, wherein the fan blade is formed on the fixed plate .