JP2005331028A - Solenoid type electromagnetic clutch - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a solenoid type electromagnetic clutch, in which manufacturing cost is greatly reduced, in which torque can be securely transmitted in spite of its compactness, and in simple structure. <P>SOLUTION: This device is provided with an electromagnetic solenoid, provided with a rotary shaft 20 in which a spline is formed, an excitation coil 32, and a yoke 34 and a movable part 39 as a magnetic circuit for the excitation coil 32, and an armature 40, having a spline in an engagement surface with the rotary shaft 20, and integrally formed with the movable part 39 of the electromagnetic solenoid 30. By action of the electromagnetic solenoid 30, spline surfaces of the rotary shaft 20 and the armature 40 are operated to be engaged and separated, thereby transmission of torque is controlled. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a clutch for a sliding door of an automobile, for example, and more particularly to a solenoid type electromagnetic clutch that is reduced in size, cost, and torque.

First, as an electromagnetic clutch, various types of electromagnetic clutches have been put to practical use as disclosed in, for example, Patent Document 1, but here, the electromagnetic clutch is hereinafter used as a clutch for a sliding door of an automobile. The friction type electromagnetic clutch will be described with reference to FIGS.
FIG. 5 is a front view showing an example of a conventional friction electromagnetic clutch.
FIG. 6 is also a side view showing an example of a conventional friction type electromagnetic clutch.

As shown in FIGS. 5 and 6, the conventional frictional electromagnetic clutch 100 includes a rotating shaft 110, a rotor 120, an armature 130, and a field assembly 140.
The field assembly 140 includes an exciting coil 142 and a yoke part 144.
In FIG. 6, reference numeral 150 denotes a gear assembly.

  With the above configuration, when the exciting coil 142 is energized, a magnetic flux is generated in the field assembly 140, attracting the armature 130 to the rotor 120 side, and torque is generated between the armature 130 and the rotor 120, and the input side gear assembly The solid 150 and the output-side rotary shaft 110 rotate in synchronization.

  On the other hand, when the energization to the exciting coil 142 is stopped, the attractive force between the armature 130 and the rotor 120 described above disappears, the armature 130 is opened, and the input side gear assembly 150 and the output side rotating shaft 110 are disconnected. .

JP 2003-83363 A

  By the way, in the conventional friction type electromagnetic clutch, first, the torque is output by the frictional force between the friction surfaces. Therefore, in order to obtain a large torque, the diameter must be designed to be large. The mass of the entire apparatus has to be increased, and the clutch space has to be increased, and the overall size, weight, and pulling have led to an increase in manufacturing cost.

  Further, since the rotor having a complicated structure is used, there is a problem that the number of parts is large and the manufacturing cost increases.

  An object of the present invention is to solve the above-mentioned conventional problems (problems), to greatly reduce the manufacturing cost, to provide a solenoid-type electromagnetic clutch that can transmit torque reliably even with a small size and has a simple structure.

  According to a first aspect of the present invention, there is provided a solenoid type electromagnetic clutch comprising: a rotating shaft having a spline formed therein; an exciting coil; and a yoke portion and a movable portion serving as a magnetic circuit of the exciting coil. And an armature formed integrally with the movable portion of the electromagnetic solenoid, and a spline surface of the rotary shaft and the armature formed by the electromagnetic solenoid. The transmission of torque is controlled by manipulating the engagement and separation.

  The solenoid type electromagnetic clutch according to claim 2 is configured such that a spline engagement surface of the armature with the rotating shaft is an inner diameter side of the armature.

  The solenoid type electromagnetic clutch according to claim 3 is a rotating shaft, an external power transmission mechanism that rotates concentrically with the rotating shaft, a rotor in which a spline is formed, an exciting coil, a magnetic circuit of the exciting coil, An electromagnetic solenoid having a yoke portion and a movable portion, and an armature integrally formed with the movable portion of the electromagnetic solenoid, wherein a spline is formed on an engagement surface with the rotor. Thus, the transmission of torque is controlled by operating the engagement and separation of the spline surface of the rotor and the armature.

  According to a fourth aspect of the present invention, the solenoid-type electromagnetic clutch is configured such that a spring separating the armature and the rotor is attached to a gap between the armature and the external power transmission mechanism.

  The solenoid type electromagnetic clutch according to claim 5 is configured such that the external power transmission mechanism is installed inside the armature.

Since the solenoid type electromagnetic clutch of the present invention is configured as described above, it has the following excellent effects.
(1) If it comprises as described in Claim 1, since the movement method of an armature is a solenoid type, it will become possible to lengthen a stroke required for mesh | engagement of a spline surface.
(2) Since torque is transmitted by meshing with a spline, high torque can be reliably realized even with a small diameter, and the clutch can be reduced in size and weight.

(3) When configured as described in claim 2, the rotor having a complicated structure can be eliminated, and the number of parts can be reduced to reduce the cost.

(4) According to the third aspect, since the armature moving method is a solenoid type, it is possible to lengthen the stroke required for meshing of the spline surfaces.
(5) Further, since torque is transmitted by meshing with a spline, high torque can be reliably realized even with a small diameter, so that the clutch can be reduced in size and weight.

(6) If comprised as described in Claim 4, a spring can be installed in the position which does not rub, and the fatigue fracture of the spring by friction can be prevented.

(7) According to the fifth aspect of the present invention, a simple structure in which assembly parts are simply loaded at the time of assembly can be achieved, and the manufacturing cost can be reduced.

  Hereinafter, each embodiment of the solenoid type electromagnetic clutch of the present invention will be sequentially described with reference to FIGS. 1 to 4.

First embodiment:
First, a first embodiment of a solenoid type electromagnetic clutch according to the present invention will be sequentially described with reference to FIGS.
FIG. 1 is a side view showing the configuration of the solenoid type electromagnetic clutch of the present embodiment.
FIG. 2 is a front view showing the configuration of the solenoid type electromagnetic clutch of the present embodiment.

First, the basic configuration of the solenoid type electromagnetic clutch 10 of the present embodiment will be described.
As shown in FIGS. 1 and 2, the solenoid type electromagnetic clutch 10 of the present embodiment includes a rotary shaft 20 having a spline formed on the outer peripheral side, an electromagnetic solenoid 30, an armature 40, and the armature 40 as a rotary shaft 20. A coil spring 42 that is spaced apart is provided.

As shown in FIG. 1, the electromagnetic solenoid 30 includes an exciting coil 32, a yoke portion 34 that serves as a magnetic circuit of the exciting coil 32, and a plate 36, and a movable portion 39 is formed integrally with the armature 40. .
A yoke 38 and an exciting coil 32 constitute a shell 38. In FIG. 1, 12 is a bearing sink of the shell 38, 14 is a gear which is an external power transmission mechanism, and 16 is a retaining ring of the gear 14.

In the solenoid type electromagnetic clutch 10 of the present embodiment, the armature 40 has a spline formed on the inner diameter side that engages with the spline surface formed on the outer peripheral side of the rotary shaft 20.
In FIG. 1, the spline engagement surface is indicated by A.

With the above configuration, the basic operation of the solenoid type electromagnetic clutch 10 of the present embodiment will be described with reference to FIGS.
When energization of the exciting coil 32 is stopped, the armature 40 is biased toward the gear 14 by the pressing force of the coil spring 42, the spline of the armature 40 and the rotary shaft 20 is separated, and the clutch 10 is turned off. The rotating shaft is idled.

On the other hand, when the excitation coil 32 is energized, magnetic flux is generated from the excitation coil 32, the armature 40 is attracted to the plate 36 against the urging force of the coil spring 42, and the armature 40 and the spline of the rotary shaft 20 are engaged. The clutch 10 is in a connected state, and the power of the rotary shaft 20 is transmitted to the gear 14.
FIG. 1 shows the clutch 10 in a connected state.

  In general, the electromagnetic solenoid 30 is a mechanical component that converts electrical energy generated by flowing a current 32 through an exciting coil into mechanical energy, and applies force and stroke to the drive units of various devices. If the moving part 39 of the exciting coil and the armature 40 are integrated and the movement system of the armature 40 is a solenoid type as in the electromagnetic clutch 10 of the embodiment, a large stroke for engaging the spline surface can be taken. it can.

  Further, by forming a spline surface for transmitting torque on the inner diameter side of the rotary shaft 20 and the armature 40 and eliminating the rotor having a complicated structure in the electromagnetic clutch 10, the number of parts can be reduced and the manufacturing cost can be reduced.

Second embodiment:
Next, a second embodiment of the solenoid type electromagnetic clutch 50 of the present invention will be described with reference to FIGS.
FIG. 3 is a partially cutaway side view showing the configuration of the solenoid type electromagnetic clutch of the present embodiment.
FIG. 4 is a front view showing the configuration of the solenoid type electromagnetic clutch of the present embodiment.

First, the basic configuration of the solenoid type electromagnetic clutch 50 of the present embodiment will be described.
As shown in FIGS. 3 and 4, the solenoid type electromagnetic clutch 50 of the present embodiment is
The rotating shaft 60, the gear 54, which is an external power transmission mechanism that rotates concentrically with the rotating shaft 60, the spline-formed rotor 70, the electromagnetic solenoid 80, and the armature 90.

As shown in FIG. 3, the electromagnetic solenoid 80 includes an exciting coil 82, a yoke portion 84 that serves as a magnetic circuit of the exciting coil 82, and a plate 86, and the movable portion 89 is formed integrally with the armature 90. .
A yoke 88 and an exciting coil 82 constitute a shell 88. In FIG. 3, 52 is a bearing sink of the shell 88, and 54 is a gear which is an external power transmission mechanism.

The armature 90 has a spline formed on the engagement surface with the rotor 70 and is integrally formed with the movable portion 89 of the electromagnetic solenoid 80.
In FIG. 3, the spline engagement surface is indicated by B.
A spring 56 that separates the armature 90 and the rotor 70 is attached to the gap between the armature 90 and the gear 54.
Further, as shown in FIG. 3, in the clutch 50 of the present embodiment, the gear 54 is installed inside the armature 90.

With the above configuration, the basic operation of the solenoid type electromagnetic clutch 10 of the present embodiment will be described with reference to FIGS.
When the energization of the exciting coil 82 is stopped, the armature 90 is urged toward the rotor 70 by the pressing force of the spring 82, the armature 90 and the spline of the rotor 70 are separated, and the clutch 50 is in the connection OFF state. Thus, the rotating shaft 60 rotates idle.

On the other hand, when the exciting coil 82 is energized, magnetic flux is generated from the exciting coil 82, the armature 90 is attracted to the gear side against the biasing force of the coil spring 82, the armature 90 and the spline of the rotor 70 are engaged, and the clutch 50 is connected, and the power of the rotating shaft 60 is transmitted to the gear 14.
FIG. 1 shows the clutch 50 connected.

  Like the electromagnetic clutch 50 of this embodiment, when the movable portion 89 of the exciting coil and the armature 90 are integrated, and the movement system of the armature 90 is a solenoid type, the stroke for engaging the spline surface is increased. Can be taken.

  Further, by placing the spring between the gear and the armature 90, the spring is always synchronized with the armature 90, so that the spring is not rubbed, and fatigue failure due to the friction of the spring can be prevented.

  In addition, by installing the gear inside the armature 90, when assembling the clutch 50 of the present embodiment, a simple structure in which only parts are loaded is obtained, and the manufacturing cost can be reduced.

The solenoid type electromagnetic clutch of the present invention is not limited to the above embodiments, and various modifications can be made.
For example, in the first embodiment described above, the configuration using the coil spring that separates the armature from the rotating shaft has been described, but a plate spring may be attached between the plate and the armature instead of this coil spring.

It is a side view showing the composition of a 1st embodiment of the solenoid type electromagnetic clutch of the present invention. It is a front view which shows the structure of 1st Embodiment of the solenoid type electromagnetic clutch of this invention. It is a side view which shows the structure of 2nd Embodiment of the solenoid type electromagnetic clutch of this invention. It is a front view which shows the structure of 2nd Embodiment of the solenoid type electromagnetic clutch of this invention. It is a front view which shows an example of the conventional friction type electromagnetic clutch electromagnetic clutch. It is a side view which shows an example of the conventional friction type electromagnetic clutch.

Explanation of symbols

10, 50: Solenoid electromagnetic clutch 14, 54: Gear (external power transmission mechanism)
20, 60: Rotating shaft 30, 80: Electromagnetic solenoid 32, 82: Excitation coil 34, 84: Yoke part 40, 90: Armature (movable part)
56: Spring 70: Rotor

Claims (5)

A rotating shaft formed with a spline;
An electromagnetic solenoid comprising an exciting coil, and a yoke part and a movable part that serve as a magnetic circuit of the exciting coil;
A spline is formed on the engagement surface with the rotating shaft, and an armature formed integrally with the movable part of the electromagnetic solenoid,
A solenoid-type electromagnetic clutch, wherein transmission of torque is controlled by operating engagement and separation between the rotary shaft and the spline surface of the armature by the electromagnetic solenoid. 2. The solenoid type electromagnetic clutch according to claim 1, wherein a spline engagement surface of the armature with the rotating shaft is an inner diameter side of the armature. A rotating shaft;
An external power transmission mechanism that rotates concentrically with the rotating shaft;
A splined rotor,
An electromagnetic solenoid comprising an exciting coil, and a yoke part and a movable part that serve as a magnetic circuit of the exciting coil;
A spline is formed on the engagement surface with the rotor, and an armature formed integrally with the movable part of the electromagnetic solenoid,
A solenoid electromagnetic clutch characterized in that transmission of torque is controlled by operating engagement and separation of the rotor and the spline surface of the armature by the electromagnetic solenoid. 4. The solenoid type electromagnetic clutch according to claim 3, wherein a spring separating the armature and the rotor is attached to a gap between the armature and the external power transmission mechanism. 5. The solenoid type electromagnetic clutch according to claim 3, wherein the external power transmission mechanism is installed inside the armature.

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