JPS6222672Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an electromagnetic clutch device, particularly an electromagnetic clutch device having a through-shaft structure in which an input shaft and an output shaft are coaxial.

The object of the present invention is to provide an electromagnetic clutch device that can easily adjust the gap between the armature of the electromagnetic clutch and the rotor, independently of the input shaft, and can be coupled to the input shaft in a short installation space.

The electromagnetic clutch device of the present invention has a through-shaft structure, in which a cylindrical joint is fitted to the output shaft of the electromagnetic clutch via a bearing, and an input shaft coupling portion provided at one end of the joint is connected to the output shaft of the electromagnetic clutch. A plurality of grooves in the axial direction are provided, and the input shaft is fitted into the joint, and is evenly tightened from the outer periphery of the joint with a clamp to fix it to the input shaft of the input shaft joint. The neck of the armature hub of the electromagnetic clutch is fitted into the armature hub so as to be movable in the axial direction, a plurality of axial grooves are provided in the neck, and a clamp is tightened evenly from the outer periphery of the neck to input the armature hub. It is characterized by being coaxially connected to the shaft.

Embodiments of the conventional electromagnetic clutch device and the electromagnetic clutch device of the present invention will be described below with reference to the drawings.

FIG. 1 shows a conventional electromagnetic clutch device with a through-shaft structure, where 1 is a stator equipped with an electromagnet of the electromagnetic clutch device, 2 is a rotor,
3 is an amateur, 4 is an amateur hub, 5 is a spring that connects the amateur 3 and the amateur hub 4,
6 is a gap between the rotor 2 and the armature 3; 7 is a bearing that supports the armature hub 4 coaxially with the output shaft 11; and 8 and 9 are first and second bearings that connect the armature hub 4 and the input shaft 10, respectively. The joint 12 is the prime mover.

Note that an output shaft 11 passes through the center of the stator 1, and the rotor 2 is integrally fixed to the output shaft 11.
The neck of the amateur hub 4 has the first joint 8.
Since the hollow cylindrical portion is loosely coupled and is integrally fixed to the neck of the amateur hub 4 by a set screw screwed from one side of the outer peripheral surface of the first joint 8, the center of the first joint 8 and A misalignment occurs between the center of the armature hub 4 and the output shaft 1.
1, and as a result, it becomes difficult to align the center of the first joint 8 and the center of the input shaft 10. Therefore, a flexible This creates the need for connection at the second joint 9.

In the electromagnetic clutch device having the configuration shown in FIG. 1, when the prime mover 12 is driven to rotate, the armature hub 4 and armature 3 rotate from the input shaft 10 via the joints 9 and 8, and the rotor 2, which is separated by the gear 6, does not rotate. .

When the electromagnet of the stator 1 is energized, the armature 3, which is a magnetic material, is attracted to the rotor 2 against the spring 5, the gap 6 becomes zero, the armature 3 is compressed against the rotor 2, and the rotor 2 becomes integral with the armature 3. The rotation of the input shaft 10 is transmitted to the output shaft 11. To release the output shaft connection, turn off the stator electromagnet. As a result, amateur 3
The suction force acting on the armature 3 becomes zero, and the armature 3 separates from the rotor 2 by the force of the spring 5, and the input shaft 10 and the output shaft 11
The connection is broken.

However, the electromagnetic clutch device having the structure shown in FIG. 1 has various defects as described below, which hinder its wide application.

(a) Gap 6 between armature 3 and rotor 2
is difficult to adjust, and readjustment requires complete disassembly of the joint.

(b) Since it is difficult to align the center of the first joint 8 with the center of the output shaft 11, it is necessary to use a flexible second joint 9.

(c) By making the second joint 9 flexible, the length in the axial direction becomes longer.

That is, the factors that determine the gap 6 between the armature 3 and the rotor 2 are the armature hub 4 and the output shaft 11.
In the configuration shown in FIG. 1, the neck 4-1 provided at the free end of the armature hub 4 is in contact with the outer ring of the bearing 7, and the armature hub 4 and the output shaft 1 are connected to each other.
The relative position with 1 is determined.

Therefore, to adjust this gap, use amateur hub 4.
A plurality of thin metal rings are inserted into the inner diameter part of the neck 4-1 and brought into contact with the bearing 7, and the relative position can be adjusted by the number of metal rings, thereby making it possible to adjust the dimensions of the gap 6.

However, if the electromagnetic clutch is repeatedly engaged and released, the friction material attached to the surface of the rotor 2 will wear out, causing the gap 6 to widen from its initial state, and eventually sufficient suction will not be achieved and engagement will become impossible. In such a case, it can be reused by readjusting the mounting position of the armature hub 3 and returning the gap 6 to the same initial dimensions. It is necessary to bring the armature 3 closer to the rotor 2 by reducing the number of metal rings inserted in the neck 4-1 of the armature 4, and this work requires removing the motor 12, joints 8, 9, and armature hub 4 from the bearing 7. The gap cannot be readjusted without complete disassembly.

In addition, in a structure in which the cylindrical portion of the first joint 8 is loosely fitted into the armature hub 4 and the cylindrical portion is fixed to the armature hub 4 with screws or other means, the center of the output shaft 11 and the center of the first joint 8 are Therefore, the second joint 9 that connects the first joint 8 and the input shaft 10 must be a flexible joint that allows for center deviation, and as a result, the axial length of the joint The problem is that it becomes long.

The present invention was devised to eliminate the above-mentioned defects, and FIGS. 2 and 3 show the structure of one embodiment thereof. In FIGS. 2 and 3, the same parts as in FIG. 1 are designated by the same reference numerals.

In the present invention, as shown in FIGS. 2 and 3, the first and second joints 8 and 9 are not used, and the inner diameter of the neck 4-1 of the amateur hub 4 is the outer diameter of the cylindrical portion of the joint 20. A plurality of grooves 4-2 in the axial direction are provided in the neck portion 4-1, and the neck portion 4-1 is provided with a plurality of grooves 4-2 in the axial direction.
An annular first clamp 21 is attached to the outside of the clamp 21, and the first clamp 21 is provided with radial slits 21-1 and 21-3.
A part of the ring is cut to form an opening, and the opening is tightened with the screw 21-2 to compress the inner diameter of the first clamp 21, and the neck 4-1 of the amateur hub 4 is tightened. It is pressed onto the cylindrical part of the joint 20 from the outer periphery with a substantially uniform force so that the center of the joint 20 and the center of the armature hub 4 are integrally fixed in a well-aligned state.

Also, the joint 20 is fitted around the outer periphery of the bearing 7 fitted to the output shaft 11, and the joint 20
The inner diameter of the neck 20-1 provided at one end is equal to the input shaft 10.
This neck portion 20-1 is provided with a plurality of axial grooves 20-2, and the neck portion 20-1 is made to match the outer diameter of the neck portion 20-1.
A second annular clamp 22 is fitted on the outside of the second clamp 22, and the second clamp 22 is provided with radial slits 22-1 and 22-3.
A part of the ring is cut to form an opening, and by tightening the opening with the screw 22-2, the inner diameter of the second clamp 22 is compressed, and the neck 20-1 of the joint is moved from the outer periphery. Input shaft 1
0 to the center of the input shaft 10 and the joint 20.
so that they can be joined with their centers well aligned.

Also, the neck 20-1 of the joint 20 is connected to the input shaft 10.
It is movable in the axial direction relative to the joint 20, thereby making it possible to arbitrarily adjust the axial length between the joint 20 and the prime mover 12.

In the present invention, as described above, the amateur hub 4 having a groove in its neck and the cylindrical part of the joint 20 having a groove in its neck are placed concentrically on a bearing fitted to the output shaft 11. and the neck 4-1 of the amateur hub 4 is connected to the first clamp 21.
By tightening the amateur hub 4 and clamp 2
Since the centers of the input shaft 10 and the joint 20 can be matched with each other, the centers of the input shaft 10 and the joint 20 can be made to match well, and there is no need to separately provide a flexible second joint 9 as shown in FIG. The connecting portion can be configured to be short.

Furthermore, since the amateur hub 4 is configured to be integrally tightened to the joint 20 by the first clamp 21, loosening the first clamp 21 allows the amateur hub 4 to move freely in the axial direction, allowing the gear 6 to be set optimally. After setting the dimensions, tighten the first clamp 21 and attach the amateur hub 4 to the joint 2.
Since it can be fixed at 0, initial gear adjustment as well as readjustment can be done by simply loosening the first clamp 21, which has the great advantage of not having to disassemble the entire gear as in the conventional configuration shown in Figure 1. . Furthermore, since it is easy to align the centers of the output shaft 11 and the input shaft 10, it is possible to provide accurate centering by providing the spigot part 14 on the end surface of the housing 13 of the electromagnetic clutch device where the prime mover 12 is attached. This makes it easy to assemble with high precision.

[Brief explanation of the drawing]

FIG. 1 is an explanatory diagram of a conventional electromagnetic clutch device, FIG. 2 is an explanatory diagram of the device of the present invention, and FIG. 3 is an exploded perspective view thereof. 1... stator, 2... rotor, 3... armature, 4... armature hub, 4-1... neck,
4-2... split groove, 5... spring, 6... gap,
7... Bearing, 8... First joint, 9
...Second joint, 10...Input shaft, 11...
...output shaft, 12...prime mover, 13...housing, 14...spigot section, 20...joint,
20-1...cervix, 20-2...split, 21...
First clamp, 21-1...Slit, 21-
2...Screw, 21-3...Slit, 22...Second clamp, 22-1...Slit, 22-2
...screw, 22-3...slit.

Claims (1)

[Scope of utility model registration request] In an electromagnetic clutch device with a through-shaft structure, a cylindrical joint is fitted to the output shaft of the electromagnetic clutch via a bearing, and a plurality of axial grooves are formed in the input shaft coupling portion provided at one end of the joint. , fit the input shaft into the coupling part, tighten it evenly with a clamp from the outer periphery of the coupling part to fix the input shaft coupling part to the input shaft, and attach the armature hub of the electromagnetic clutch to the cylindrical part of the joint. A neck is fitted so as to be movable in the axial direction, a plurality of axial grooves are provided in the neck, and a clamp is evenly tightened from the outer periphery of the neck to coaxially connect the armature hub and the input shaft. An electromagnetic clutch device characterized by: