JPS63251632A - Air-motor operated clutch - Google Patents

Abstract

PURPOSE:To cut down the manufacturing cost of and miniaturize the captioned clutch by forming a pneumatic chamber between the inner periphery of the clutch main body and the outer periphery of a piston and introducing the compressed gas into the pneumatic chamber so that a clutch plate is pushed for contact with another clutch plate. CONSTITUTION:A pneumatic chamber 37 is formed between the outer periphery of a piston 33 and the inner periphery of a cylinder 24. When compressed gas is introduced into the pneumatic chamber 37 via an air introducing hole 38, the piston 33 moves toward the left-end side, resisting the pushing force of a spring 30. On the other hand, when the compressed gas runs out from the pneumatic chamber 37, the spring 39 puts the piston back to the initial position. Accordingly, the clutch main body, which forms the pneumatic chamber 37, does not rotate at all, thereby dispensing with a casing. Thus, the captioned clutch can be miniaturized.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field 1] The present invention relates to a pneumatically operated clutch in which connection and disconnection of the clutch is performed by pneumatic pressure.

[Prior Art 1] A conventional clutch of this type is shown in FIG. 2. This pneumatically operated clutch transmits the rotational force input to the sprocket 1 to the driving clutch plate 3 via the key 2, and transfers the rotational force of the driving clutch plate 3 to the driven clutch plate 4,
The signal is transmitted to the output shaft 7 via a holder 5 and a key 6 that are spline-fitted thereto. The connection and disconnection between the clutch plates 3 and 4 is performed by a piston 8 and a spring 9 connected to the driven clutch plate 4. That is, a pneumatic chamber 11 is formed by the holder 5, the cylinder 10, and the piston 8. When air is sent in, the piston 8 presses the driven clutch plate 4 into contact with the clutch shoe 3a of the driving clutch plate 3 against the force of the spring 9, thereby connecting both clutch plates 3 and 4. On the other hand, when the compressed air is removed from the pneumatic chamber 11, the spring 9 is connected to the piston 8 connected to the driven clutch plate 4.
to the right in the figure to separate the driven clutch plate 4 from the clutch shoe 3a. As a result, both clutch plates 3 and 4 are disconnected.

[Problem 1 to be Solved by the Invention] In the pneumatically operated clutch having the above configuration, since the pneumatic chamber 11 rotates together with the output shaft 7, the rotary pneumatic joint 12 must be used. In this case, there is no problem if the rotary pneumatic joint 12 is inexpensive, but the rotary pneumatic joint 12 is very expensive. For this reason, there was a problem in that the manufacturing cost of the clutch increased. In addition, since the holder 5, cylinder 10, etc. that form the outer surface of the clutch rotate, in actual use, from the standpoint of safety, a casing (
(not shown), resulting in a problem that the device becomes larger.

[Object of the Invention] The present invention has been made in consideration of the above circumstances, and an object thereof is to provide a pneumatically operated clutch that is inexpensive and can be downsized.

[Structure of the Invention r & 1] In order to achieve the above object, the present invention includes a cylindrical clutch body, a rotatable member on the inner periphery of one end of the clutch body, and a rotatable member rotatable from the other end to the one end along the axis of the clutch body. a cylindrical piston provided on the inner periphery of the other end of the clutch wood so as to be movable in the direction along its axis; a second clutch plate that faces the clutch plate with its axis aligned with the second clutch plate and is provided rotatably on the piston but immovable in the direction along the axis, the inner periphery of the clutch body and the outer periphery of the piston between the pistons and the first
A pneumatic chamber is formed to press the clutch plate toward the clutch plate.

[Operation 1] When compressed gas is introduced into the pneumatic chamber, the piston moves toward the first clutch plate and brings the second clutch plate into pressure contact with the first clutch plate. In this state, when either the first clutch plate or the second clutch plate is driven to rotate, the rotational force is transmitted to the other.

[Embodiment 1] Hereinafter, an embodiment of the present invention will be described with reference to FIG. Note that FIG. 1 is a longitudinal sectional front view of the pneumatically operated clutch according to the present invention.

In the figure, numeral 21 is the clutch body.

The clutch body 21 has a cylindrical shape as a whole, and motor brackets 22 are sequentially arranged from one end (hereinafter referred to as the left end) to the other end (hereinafter referred to as the right end) with their axes aligned with each other. , a housing section 23, a cylinder section 24, and a bracket 25. The motor bracket 22 and the housing part 23 are fixed by bolts 26, and the housing part 23, the cylinder part 24, and the bracket 25 have a sill part 24 interposed between the housing part 23 and the bracket 25. 271 more. A motor 28 is attached to the left end surface of the seven-motor bracket 22, which is fixed to the motor bracket 22, with its pongee 29 aligned with the axis of the motor bracket 22. Further, a first clutch plate 30 is provided on the inner periphery of the motor bracket 22 via a ball bearing 31 so as to be rotatable and prevented from moving from the right end side to the left end side. This first clutch plate 30 is connected to the motor 2
It is designed to be rotationally driven by the pongee 29 of No. 8 via the key 32.

Further, a central large diameter portion 34 of a cylindrical piston 33 is fitted into the inner periphery of the cylinder portion 24 so as to be movable in the axial direction. A left small diameter portion 35 and a right small diameter portion 36 are formed on the left and right end surfaces of the piston 33, respectively. The left small diameter portion 35 is movably fitted to the inner periphery of the right end of the housing 23, and the right small diameter portion 36 is movably fitted to the bracket 25. In addition, the piston 33
The opening between the outer circumference of the piston 3 and the inner circumference of the cylinder portion 24
A pneumatic chamber 37 is defined by the left end surface of the cylinder portion 3, the outer periphery of the right small diameter portion 36, the left end surface of the bracket 25, and the inner periphery of the cylinder portion 24. When compressed gas is introduced into the pneumatic chamber 37 through the air introduction hole 38 formed in the bracket 25, the piston 33 resists the pressing force of the spring 39 provided between the piston 33 and the housing part 23.
When the piston 33 moves to the left end side and the compressed gas flows out from the pneumatic chamber 37, the piston 33 is returned to its original position by the spring 39. In addition, the symbol 40.41 in the figure
Reference numeral 42 indicates a sealing member made of an elastic material, and reference numeral 42 indicates an O-ring.

Further, an output shaft 43 is provided on the inner periphery of the piston 33 via ball bearings 44, 45 so as to be rotatable but immovable in the axial direction. At the left end of the output shaft 43 that protrudes from the piston 33,! @2 clutch plate 4
6 is formed with its axis aligned with the axis of the first clutch plate 30.

When the output shaft 42 is moved to the left end side by the piston 33, the second clutch plate 46 is pressed into contact with the clutch plate side -30a provided on the left end surface of the first clutch plate 30, It rotates together with the clutch plate 30 of No. 1. On the other hand, when the output shaft 42 is moved toward the right end side by the piston 33, it is brought into pressure contact with a brake shoe 47 provided on the housing portion 23, and its rotation is prevented.

In the pneumatically operated clutch configured as described above, when transmitting the rotational force of the motor 28 to the output shaft 43, the air introduction hole 38
Compressed gas is introduced into the pneumatic chamber 37 from. Then, the piston 33 moves to the left end side together with the output shaft 43, and the second clutch plate 46 comes into pressure contact with the clutch shoe 30a of the first clutch plate 30. This causes the output shaft 43 to rotate.

On the other hand, when the compressed gas flows out from the pneumatic chamber 37, the spring 3
9, the second clutch plate 46 is connected to the first clutch plate 3.
0, and no rotational force is transmitted to the output shaft 43. Moreover, since the second clutch plate 46 is brought into pressure contact with the brake shoe 47, the rotation of the output shaft 43 is reliably prevented.

In the above-mentioned pneumatically operated clutch, since the piston 33 and the output shaft 43 are made relatively rotatable, the pneumatic chamber 37 does not rotate, and therefore the rotary pneumatic pressure required in the conventional clutch is eliminated. No joints are needed at all. Therefore, manufacturing costs can be reduced accordingly.

Furthermore, since the clutch body 21 forming the pneumatic chamber 37 does not rotate at all, there is no need to provide a casing.
, the clutch body 21 itself can also be used as a casing. Therefore, the device can be made smaller.

Note that in the above embodiment, the second clutch plate 46
are formed integrally with the output shaft 43, but they may be formed separately and then integrated.

Also, a motor shaft 2 serving as an input shaft is attached to the first crank plate 30.
9 is connected, and the output shaft 43 is connected to the second clutch plate 46, but conversely, the output shaft 43 is connected to the input shaft,
An output shaft may be connected to the first clutch plate 30. Furthermore, although the second clutch plate 46 is moved away from the first clutch plate 30 by the spring 39, it can of course be moved by pneumatic pressure. In addition,
Regarding brake shoe 47, it is not necessarily necessary.
11° [Effect of the Invention 1 As explained above, the pneumatically operated clutch of the present invention includes a cylindrical clutch body, and a rotatable member on the inner periphery of one end of the clutch body that is rotatable along the axis of the clutch body. a first clutch plate provided so as not to be movable in the direction from the other end to the one end; and a cylindrical piston provided movably in the direction along the thin line on the inner periphery of the other end of the clutch body. , a second clutch plate facing the first clutch plate with their axes aligned with each other, and provided rotatably on the piston but immovable in the direction along the axis, the inner periphery of the clutch body and the Since a pneumatic chamber for pressing the piston toward the first clutch plate is formed between the outer periphery of the piston and the piston, the clutch can be manufactured at a low cost. Effects such as miniaturization can be obtained.

[Brief explanation of drawings]

FIG. 1 is a longitudinal sectional front view showing an embodiment of the present invention, and FIG. 2 is a longitudinal sectional front view showing an example of a conventional pneumatically operated clutch. 21... Clutch body, 30... First clutch plate, 33... Piston, 37... Pneumatic chamber, 46...
Second clutch plate.

Claims (1)

[Claims] a cylindrical clutch body; a first clutch plate rotatably provided on the inner periphery of one end of the clutch body and immovable in a direction from the other end toward the one end along the axis of the clutch body; A cylindrical piston is provided on the inner periphery of the other end of the clutch body so as to be movable in a direction along its axis; a second clutch plate provided so as to be immovable in the direction along the clutch, and an air space between the inner periphery of the clutch body and the outer periphery of the piston for pressing the piston toward the first clutch plate side; A pneumatically operated clutch characterized by having a pressure chamber formed therein.