JP3107230U - Remote switching mechanism of meshing clutch - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide friction between a pressing force of a steel ball or a roller and a pressing force blocking / holding mechanism in a torque limiter installed between a driving machine and a driven machine to cut off a torque exceeding a predetermined torque and protect the driven machine. Eliminate factors, reduce set torque variation, improve accuracy, eliminate operating time delay, and simplify structure.
A reversing spring is used as a mechanism for pressing and pressing force against a ball or a roller as a torque transmission intermediate between a driving machine and a driven machine.
[Selection] Figure 1

Description

The present invention relates to remote engagement / disengagement means for a meshing clutch provided in a part of a drive system.

An example of a conventional meshing clutch is shown in FIGS. This example is a practical example of a so-called extruder reducer for a resin machine. FIG. 3 shows the overall arrangement of the drive system, and FIG. 4 shows the configuration of the meshing clutch section. The extruder 6 has a twin screw close to the cylinder, and when starting or stopping the operation, the screw must be rotated at low speed to input and discharge materials. Or the discharge motor 4 is installed.

Therefore, in this drive system, since two drive motors are connected to one driven machine, in order to operate each motor independently, the stop side motor needs to be cut off. Therefore, in this example, a switching clutch 2 having a torque limiter is provided between the main motor 1 and the speed reducer 3, and a driving system of the starting or discharge motor 4 is a meshing clutch between the speed reducer 3 and the speed reducer 5. When the main motor 1 is driven, the driving system of the starting or discharge motor 4 is disconnected by the clutches 7 and 8, and when the starting or discharge motor 4 is driven, the main motor 1 is driven. 1 is disengaged by the clutch 2.

Next, as shown in FIG. 4, the meshing clutches 7 and 8 have a serrated or square claw 7a at the end of the hub, and a spline is engraved on the inner periphery thereof. The spline 7b carved on the outer periphery of the output shaft of the speed reducer 5 is engaged with the spline 7b so as to be movable in the axial direction. The driven clutch 8 has a sawtooth or square claw 8a at the end of the hub, and is fixed to the shaft 8b. In addition, the clutch 7 is slid in the axial direction by the hydraulic or pneumatic actuator 10 through the lever 9 to engage and disengage the claws 7a and 8a.

The engagement / disengagement of the meshing clutch having such a configuration is performed by remotely operating the actuator 10 from a driver's cab which has not been visually recognized. When using the starting or discharge motor 4, the clutch 2 is first stopped in a stopped state. After the disconnection, the meshing clutches 7 and 8 are connected, and when the main motor 1 is used, the clutches 7 and 8 are disconnected by the actuator 10 in the same stop state, and the operation is started after the clutch 2 is connected.

The saw-tooth or square claw-meshing clutch having the above-described configuration is remotely operated, and thus has had the following technical problems when the clutches 7 and 8 are connected. That is, when the actuator 10 is operated remotely, the crests and valleys of the claws 7a and 8a do not mesh well, and a so-called phase shift state appears. Therefore, the actuator 10 is connected as a conventional operation method as a method of always meshing. In the direction, that is, in the “fitting” direction, with the driving claw 7a and the end face of the driven claw 8a being close to or in contact with each other, the motor 4 is activated to cause relative slip at the end faces of the claw 7a, 8a. The mountain and valley of 7a and 8a are engaged.

In this case, in general, the driving-side claw 7a has a maximum relative slip amount with respect to the claw 8a that is stationary on the load follower side, and the claw 7a, 8a collides in a dynamic state after the claw is rotated by one pitch. Therefore, a large impact force and a collision sound are generated, which is an environmental problem in terms of the strength of the drive system including the claw portion. The present invention has been devised to eliminate such problems and provide a smooth connection of the clutches 7 and 8.

Means to solve the problem

The present invention is a switching mechanism devised for the purpose of realizing a smooth connection of the clutches 7 and 8. The basic arrangement of the equipment, the clutch and the auxiliary mechanism are conventional mechanisms, and an air motor is additionally installed in a part of the drive system. The problem is solved. That is, when the clutches 7 and 8 are connected, the air motor slower than the starting or discharge motor 4 is started with the actuator 10 operated in the “fitting” direction, and the claw and trough of the claws 7a and 8a are temporarily When the phase is shifted, the crests 7a and 8a are engaged with each other at a low speed while causing a relative slip at the end face, and then the starting or discharge motor 4 is started so that the impact at the time of the claw collision. It is intended to reduce force and impact sound. In addition, by adopting an air motor, it is possible to reduce the impact force without applying overload torque at the time of claw fitting, and it is possible to stall without shutting off air after fitting. It can be mechanically connected to the discharge motor 4 and can be easily controlled.

Effect of device

As described above, in the present invention, when the connection of the saw-tooth or square claw-engaged clutch is performed remotely, when the claw phase is inconsistent, the claw peaks and troughs are matched and the connection is completed while the claw end face relative slip occurs. By rotating with a low-speed air motor, the impact force and impact sound at the time of claw collision can be reduced, the drive system can be designed and manufactured economically, and durability can be improved. Moreover, the impact sound at the time of a claw collision can be reduced and the environment can be improved. In addition, by using an air motor, it is possible to continue supplying air by stalling the air motor with respect to the load torque on the driven machine side generated after the claws are fitted, and the control becomes simple.

FIG. 1 shows an embodiment of the present invention.

FIG. 1 is an overall arrangement of a drive system according to the present invention, and the configuration and operation method will be described in detail below. 1 to 8 in FIG. 1 are the device arrangements described above (conventional technology), and the meshing clutch portion includes the incidental mechanism thereof and conforms to FIG. 4, but in the embodiment according to the present invention, starting or discharging is performed. On the opposite side of the motor 4, the total torque of the unloaded friction torque of the speed reducer 5 and the friction torque between the claws 7 a and 8 a end face generated when the clutches 7, 8 are connected is lower than the motor 4. An air motor 11 and a one-way clutch 12 are additionally provided.

Hereinafter, a method of connecting the clutches 7 and 8 will be described in detail based on the device arrangement of FIG.
First, the clutches 2 and 7 and 8 are engaged and disengaged while the operation of the main motor 1 and the starting or discharge motor 4 is stopped. However, since the operation method when the main motor 1 is used is the same as the conventional method, it will be described in detail here. First, the method of connecting the clutches 7 and 8 according to the present invention will be described in detail below.

The starting or discharging motor 4 is operated by first disengaging the clutch 2 and then connecting the clutches 7 and 8. In this case, the actuator 10 is first connected remotely from the operator's cab in the connecting direction, ie, “fitting”. After that, the air motor 11 is started, the engagement between the claws 7a and 8a is completed, and after confirming the completion of the “fitting” by the sensor 13, the starting or discharge motor 4 is started to start a predetermined operation.

In this case, there is no guarantee that the peaks and valleys of the claws 7a and 8a are in phase with each other when the actuator 10 is operated. In this state, the claw 7a on the driving side is in contrast to the claw 8a that is stationary on the load driven side. While being pressed by the actuator 10, the air motor 11 rotates to the point where the claw peaks and troughs coincide with each other while the claw end face relative slip occurs at a low speed, thereby completing the engagement.

Next, when the engagement of the claws is completed and the connection between the clutches 7 and 8 is completed, the sensor 13 confirms the completion of the clutch “fitting”, and the starting or discharge motor 4 is started. Therefore, the air motor 11 having a low torque capacity cannot withstand it, so that it will be in a stalled state for a short time. When the starting or discharging motor 4 is started, the stall state is released, but air is continuously supplied to the air motor 11 after that, so that a difference in rotational speed between the motor 4 and the air motor 11 occurs. In the embodiment, a one-way clutch 12 is incorporated to absorb this speed difference. Of course, it goes without saying that the one-way clutch 12 can be omitted depending on the rotational speed difference between the air motor 11 and the starting or discharge motor 4.

In the embodiment of FIG. 1, the air motor 11 is disposed on the opposite input side of the starting or discharge motor 4, but it can also be disposed on the rear end side of the motor 4 as shown in FIG. Although not shown in the drawing, the air motor can be installed on a part of the drive system, for example, on a part of the shaft of the speed reducer.

1 is an overall layout diagram of a drive system including a meshing clutch according to an embodiment of the present invention, and is an embodiment in which an air motor is arranged on the opposite side of a drive motor. 1 is an overall layout diagram of a drive system including a meshing clutch according to an embodiment of the present invention, and is an embodiment in which an air motor is arranged on the rear end side of a drive motor. 1 is an overall arrangement of a drive system including a meshing clutch showing an embodiment of the prior art. It is a side view which shows the switching mechanism of a meshing type clutch.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Main motor 2 Switching type clutch with torque limiter 3 Main drive speed reducer 4 Starting or discharge motor 5 Starting or discharge speed reducer 6 Extruder body 7 Drive side meshing clutch 7a Drive side meshing clutch claw 7b Drive side shaft Spline 8 driven side meshing clutch 8a driven side meshing clutch claw 8b driven side shaft 9 switching lever 10 actuator (hydraulic or pneumatic cylinder)
11 Air motor 12 One-way clutch 13 Clutch “fitting” detection sensor 14 Clutch “disengagement” sensor

Claims (1)

  In a meshing clutch arranged for the purpose of interrupting or coupling the driving force to a part of the driving system that transmits the driving force from the driving machine to the driven machine, in addition to the lever and actuator switching means provided, A remote switching mechanism characterized in that an air motor is provided to enable smooth insertion and removal.

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