JPS5821026A - reverse acting clutch - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed description of the invention] This invention is made possible by the strong pressing force of the built-in spring.

This relates to a so-called reverse action clutch that maintains a connected state and releases the connection by applying an external force.

For example, in drive systems that open and close water gates at the openings of dams, waterways, and sea walls, the clutches provided in the system are often reverse-actuating clutches.

However, as is well known, a reverse action clutch has a built-in spring with a strong pressing force, and whether it is a friction plate type or a meshing type, the pressing force of the spring keeps the friction plate or the meshing member in an engaged state, and when the clutch is released, an external force is applied. is added to compress the spring.

Therefore, even if an attempt is made to switch to manual mode and open or close a load, such as a water gate, the entire drive system must be manually rotated, and manual rotation becomes difficult.

Therefore, there has been a strong desire to develop a reverse-actuating clutch that can arbitrarily disconnect the output side from the input side.

On the other hand, especially in reverse-actuating clutches that use friction plates, the friction plates may wear out and slip due to long-term use, making it impossible to transmit torque.

In such cases, if you can avoid using a friction plate and connect the input side and output side directly until repairs are made to replace the friction plate, you can minimize the occurrence of various troubles. There has been a strong desire to develop a reverse acting clutch that has the ability to directly connect the input and output sides as required.

Based on the above-mentioned viewpoints, this invention provides a reverse action clutch that can meet the various demands described above, and includes an outer hub that can be freely displaced in the axial direction on the outside of an inner hub that rotates integrally with the input shaft. An output rotor is fixed to an output shaft that is arranged concentrically and whose axis is on an extension of the axis of the input shaft, and a drum that faces the outside of the outer hub in a concentric arrangement is fixed to the output rotor. In addition, an outer disk is supported on this drum, and an inner disk is supported on the inner hub. A meshing part is provided on the outer periphery of the inner hub, and a male-shaped meshing part is provided on the drum side that can be freely engaged with and detached from the male-shaped meshing part of the outer hub, and the input and output sides are connected in a clutch state. It is characterized by the ability to freely perform switching operations such as release and direct connection between the input and output sides without using the inner disk and outer disk.

Next, the reverse action clutch of the present invention will be explained by way of embodiments with reference to the drawings.

FIG. 1 shows a cross-sectional side view of an embodiment of the reverse action clutch of the present invention. As shown in the drawings, the reverse action clutch of this embodiment is an example of a reverse action electromagnetic clutch, in which an input hub 3 fixed to an input shaft l via a key 2 is arranged concentrically and relatively axially It consists of an inner hub 3A and an outer hub 3B that are movable.

On the other hand, an output rotor 6 fixed to the output shaft 4 via a key 5
is supported with respect to the field core 7 via a bearing 8 so as to be freely rotatable.

The input shaft 1 and the output shaft 4 are arranged with their axes on the same line, and multi-plate friction transmission provides torque transmission.

A plurality of inner disks 9 are spline-fitted to the outer hub 3B, and a plurality of inner disks 9 are fitted to the output rotor 6 by spline fitting.
A plurality of outer disks 12 are spline-fitted to the drum 11, which is fixed concentrically.

The inner disks 9 and outer disks 12 are arranged alternately.

An armature 13 is directly opposed to the front surface of the output rotor 6, and a plurality of bolts 1 are connected to a ring 14 spline-fitted to the ring 11.
5. It is fixed concentrically.

The armature 13 is pressed by a compression coil spring LF inserted into a plurality of recesses 16 provided in the output rotor 6, and the outer disk 12 and the inner disk 9 are connected to a ring provided near the front end of the drum 11. press against.

The ring 1 is screwed into a screw hole 19 formed on the inner periphery of the front end of the drum 11, and is fixed with a plurality of bolts 22 to a ring plate 21 which is fixed to the front end of the drum 11 with a plurality of bolts 20. It is.

A spline hole 21A is formed in the inner diameter part of the ring brake (ring brake) 211'i as a female meshing part, and an inner disk supporting spline 23 as a male meshing part formed on the outer hub 3B is inserted into this spline hole 21A. They are now able to mesh.

On the other hand, the inner hub 3A and the outer hub 3B are oil-impregnated bearings 24.
Furthermore, at the end of the armature, the inner hub 3A has splines 25A and 25B as male-shaped meshing parts on the outer periphery, and the inner periphery of the outer hub 3B has female-shaped splines 25A and 25B. Spline hole 26 as a meshing part
It is formed.

The relationship between the splines 25A, 25B and the spline hole 26, and the relationship between the spline 23 and the spline hole 21A, as shown in the operation explanatory diagram in FIG. 2, the inner disk 9 and the outer disk 12 are pushed by the armature. When they are in the normal state I in which they are in pressure contact with each other and the splines 23 are properly spline-fitted to the inner disk 9,
The spline 25A properly engages the spline hole 26,
Torque transmission from the input side to the output side becomes possible.

Next, when the outer hub 3B is moved to the state (3), the spline 25A is removed from the spline hole 26, but the spline 23 remains spline-fitted to a part of the inner disk 9.

Next, when the outer hub 3B is moved in the opposite direction to the state (■), the spline 25A is removed from the spline hole 26,
The spline 23 is also spline-fitted with the inner disk 9.

Furthermore, when the outer hub is moved to the state of 3B'ii■,
A part of the spline 23 engages with the spline hole 21A, but the spline hole 26 does not reach the spline 25B.

When the outer hub 3B is displaced to the maximum and is in the state (■), the spline 25B is engaged with the spline hole 26, and the spline 23 is engaged with the spline hole 21A.

The outer hub 3B is supported by a bearing 27 on an external operating member (not shown), and the operating member that supports the bearing 27 is a member (both of which are (not shown).

Further, the drum 11 is connected to a manual rotation mechanism (not shown), and when operating this manual rotation mechanism, it is impossible to apply voltage to the electromagnetic coil 28 built in the field core 7. or.

It is safe to allow the manual rotation mechanism to be operated only when voltage cannot be applied to the electromagnetic coil 28.

Note that an electromagnetic coil 2 is attached to the flange portion 6A of the output rotor 6.
An annular non-magnetic portion 29 is provided so that the magnetic flux generated by applying voltage to the armature 13 passes through the armature 13 to bypass the magnetic flux □
It is like that.

The reverse action electromagnetic clutch of the present invention having the above-mentioned configuration has the following features:
In the state shown in FIG. 1, the armature 13 is pressed by the compression coil spring 17 to press the inner disk 9 and the outer disk 12 into contact with each other.

In this state, from input shaft l to key 2. Inner hub 3A, spline 25A, spline hole 26. Outer hub 3B, spline 23. Inner disk 9° Outer disk 12
．． Drum 11. Output rotor 6° Output shaft 4 via key 5
Torque is transmitted to.

Next, when voltage is applied to the electromagnetic coil 28.

The armature 13 is excited and magnetically attracted to the output rotor 6 against the elastic pressing force of the compression coil spring 17.

As a result, the inner disk 9 and the outer disk 12
Since the pressing force on the inner disk 9 and the outer disk 12 become mutually free, no torque is transmitted from the input shaft 1 to the output shaft 4.

Now, when the input side and the output side are still connected in the de-energized state, if the outer knob 3B is moved to the position I shown in FIG. 2, the spline hole 26 will come off the spline 25A. , the inner knob 3A and the outer hub 3B, which are fitted concentrically through the oil-impregnated bearing 24, become free from each other, and the input side and the output side are separated from each other despite the pressure contact between the inner disk 9 and the outer disk 12. The state will be as follows.

When moving the outer hub 3B in the axial direction, the armature 1
When the outer hub 3B is moved in the direction away from the drum 3 to the state shown in (3), the outer hub 3B becomes free from both the drum 11 and the inner knob 3A.

In this state, rotate the drum 11 slightly by hand, and
After adjusting the position of the spline hole 21A to a position where the spline holes 21A and 3 can engage with each other, and then moving the outer tab 3B to the position . 25B, and the outer hub 3B and inner hub 3A remain free from each other.

If the drum 11 is slightly rotated by hand in this state, the outer hub 3B will also rotate together, so that the position of the spline hole 26 can be adjusted to engage the spline 25B.

After performing this adjustment, if the outer hub 3B is moved to the ■ position, the spline hole 26 will engage the spline 25B, and since the spline 23 has already engaged the spline hole 21A, the input shaft 1 and the input hub 3. Output rotor6. A state in which the output shaft 4 is directly connected is obtained.

In this direct connection state, inner disk 9 and outer disk 1
Even if slippage occurs on the input shaft 1, torque can be reliably transmitted from the input shaft 1 to the output shaft 4.

Although this embodiment is an example of a reverse action electromagnetic clutch, it goes without saying that the present invention may be applied to a reverse action hydraulic clutch that utilizes fluid pressure other than an electromagnetic clutch.

As is clear from the above explanation, the reverse action clutch of the present invention can release the connection between the input side and the output side while the clutch is in the clutch state, and also disconnects the input and output side when the frictional contact becomes malfunctioning. It is possible to directly connect and reliably transmit torque, and to enable switching to manual rotation and direct connection on the input/output side, regardless of the importance of the clutch, and to maintain safety for heavy-load equipment such as water gate drive systems. It has excellent effects such as the ability to

[Brief explanation of drawings]

FIG. 1 is a longitudinal sectional side view showing an embodiment of the reverse action clutch of the present invention, and FIG. 2 is an explanatory view of the operation of the outer hub. In the drawings, l...input shaft, 2...key, 3...input hub, 3A...inside/'7'. 3B...Outer hub, 4...Output shaft, 5...Key, 6...Output rotor, 6A...7 Runci portion%〒...Field core. 8...Bearing, 9...Dunna disk. 10...Bolt, 11...Drum. 12... Outer disk, 13... Armature, 14... Ring% 15... Bolt, 16
... recess, l ... compression coil spring, 18.
...Ring, 19...Screw hole. 20...Holt, 21...Ring plate, 21A...Sphrain hole, 22...Bolt, 23
...Spline, 24...Oil-impregnated bearing, 25A, 25
B...Spline, 26...Spline hole, 27.
・・Pair 'J/fi 28...Electromagnetic coil,
29...Nonmagnetic part. Applicant Ogura Clutch Co., Ltd. Agent Tomi 1) Kazuo

Claims (1)

[Claims] An outer knob that can be freely displaced in the axial direction is placed concentrically on the outside of the inner knob that rotates together with the input shaft.
An output rotor is fixed to an output shaft whose axis is placed on an extension of the axis of the input shaft, and a drum facing concentrically to the outside of the outer nozzle is fixed to the output rotor. supports the outer disk, and the outer knob supports the inner disk, respectively.
Furthermore, a male-shaped engaging part is provided on the outer periphery of the inner knob and is detachable from the male-shaped engaging part provided on the inner periphery of the outer knob. A removable, sample-shaped engagement part is provided on the drum side, making it possible to freely switch the connection state of the input and output sides in the clutch state and direct connection of the input and output sides without using the inner disk and outer disk. A reverse action clutch characterized by: