JP2014172527A - Pto remote connection/disconnection device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve working efficiency by enabling connection/disconnection of a power takeoff device from the outside of a vehicle.SOLUTION: The PTO remote connection/disconnection device includes: a first hydraulic pathway 1 for generating hydraulic pressure by a first clutch master cylinder 3 actuated by the stepping on of a clutch pedal 2, and disconnecting a clutch through a release cylinder 4; a switching cylinder 7 provided halfway of the first hydraulic pathway 1, for cutting off a flow path toward the first clutch master cylinder 3 by hydraulic pressure from a different second hydraulic pathway 6, and making the hydraulic pressure from the second hydraulic pathway 6 act on the release cylinder 4; a hydraulic unit 14 for generating the hydraulic pressure at the second hydraulic pathway 6 by drive of an electric motor 13; a control unit 22 for controlling the drive of the electric motor 13 so as to disconnect the clutch, and at the time of the disconnection, connecting/disconnecting a power takeoff device 31; and a remote controller 36 for instructing the control unit 22 to connect/disconnect the power takeoff device 31, by radio.

Description

  The present invention relates to a PTO remote connection / disconnection device.

  In specially equipped vehicles (special equipment vehicles) such as an aerial work platform equipped with a hydraulic lift type aerial work platform as a bodywork facility, engine power should be used as auxiliary power for hydraulic pumps and other purposes for purposes other than traveling. The power take-off device (PTO: Power Take off) attached to the transmission can take out the engine power in an idling state and drive the accessory.

  Until now, when connecting / disconnecting the power take-off device to the engine, an operator sits in the driver's seat and depresses the clutch pedal to disengage the clutch, and in this state, the PTO switch in the vehicle is pressed to turn it on. Thus, the power take-off device is connected to the engine, and then the clutch is returned to the connected state by releasing the foot from the clutch pedal.

  As prior art document information related to this type of PTO remote connection / disconnection device, there is Patent Document 1 below.

JP 2000-43597 A

  However, it is troublesome to return to the driver's seat and operate the clutch pedal and PTO switch to connect and disconnect the power take-off device in this way, and it is necessary to get on and off the vehicle during work outside the vehicle. As a result, there was a problem that work efficiency was lowered.

  The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a PTO remote connection / disconnection device capable of connecting / disconnecting a power take-off device from the outside of the vehicle and improving work efficiency.

  The present invention is a PTO remote connection / disconnection device that can connect / disconnect a power take-off device that takes out engine power in an idling state and drives an auxiliary device by remote control, and operates when a clutch pedal is depressed. A first hydraulic system path that generates hydraulic pressure by one clutch master cylinder and disengages the clutch through the release cylinder, and a first hydraulic path that is provided in the middle of the first hydraulic system path by hydraulic pressure from another second hydraulic system path A switching cylinder that shuts off a flow path toward the clutch master cylinder and applies hydraulic pressure from the second hydraulic system path to the release cylinder; and a hydraulic unit that generates hydraulic pressure by driving an electric motor in the second hydraulic system path And disconnecting the clutch by controlling the driving of the electric motor in the hydraulic unit and disconnecting the power take-off device when the clutch is disconnected. And a control unit that performs, is characterized in that a remote control capable of indicating the disengagement of the power take-off device to the control unit wirelessly.

  Thus, if this is done, the remote control is taken out of the vehicle, the control unit is instructed to connect the power take-off device, and the control unit drives the electric motor of the hydraulic unit to generate hydraulic pressure in the second hydraulic system path. The switching cylinder cuts off the flow path toward the first clutch master cylinder, and the hydraulic pressure from the second hydraulic system path is applied to the release cylinder to disconnect the clutch, and the control is performed when the clutch is disconnected. The power take-off device is connected by the unit, and after the connection is completed, the control unit can lose the hydraulic pressure of the second hydraulic system path via the electric motor of the hydraulic unit and return the clutch to the connected state. The trouble of returning to the driver's seat and operating the clutch pedal or PTO switch to connect or disconnect the take-off device It is not necessary to perform the work.

  Further, in more concrete implementation of the present invention, the switching cylinder is offset by the cylinder chamber communicating the first clutch master cylinder side and the release cylinder side of the first hydraulic system path and the elastic force of the spring. Thus, the first clutch master cylinder side and the release cylinder side are kept in communication with each other and slidable in the cylinder chamber so as to be able to move forward against the elastic force of the spring by the hydraulic pressure from the second hydraulic system path. It is preferable to include a accommodated cylinder and a valve that shuts off a flow path toward the first clutch master cylinder in conjunction with the forward movement of the cylinder, and further, the hydraulic unit performs the rotational motion of the electric motor. Stroke motor that moves back and forth by converting into linear motion, lever mechanism that is tilted by the stroke motor, and push A second hydraulic system path when pushed to de good and a second clutch master cylinder for generating a hydraulic pressure.

  According to the above-described PTO remote connection / disconnection device of the present invention, the power take-off device can be easily connected / disconnected from the outside of the vehicle by a remote controller, so that the user can return to the driver's seat to connect / disconnect the conventional power take-off device. Therefore, troublesome work such as operating the clutch pedal and the PTO switch can be eliminated, and it is not necessary to get on and off the vehicle during the work outside the vehicle, so that the work efficiency can be greatly improved. An excellent effect can be achieved.

It is the schematic which shows an example of the form which implements this invention. It is sectional drawing which shows the operating state of the hydraulic unit of FIG. It is sectional drawing which shows the operating state of the switching cylinder of FIG.

  Embodiments of the present invention will be described below with reference to the drawings.

  FIG. 1 shows an example of an embodiment of the present invention. Reference numeral 1 in the figure indicates that a hydraulic pressure is generated by a first clutch master cylinder 3 that is operated by depressing a clutch pedal 2, and a clutch is provided via a release cylinder 4. When the release cylinder 4 to which hydraulic pressure is applied pushes the release fork 5, the release fork 5 pulls up a release bearing (not shown) based on the lever principle, Thereby, a diaphragm spring (not shown) is pulled up and the clutch is disconnected.

  In the middle of the first hydraulic system path 1, the hydraulic pressure from another second hydraulic system path 6 blocks the flow path toward the first clutch master cylinder 3 and the hydraulic pressure from the second hydraulic system path 6 is reduced. A switching cylinder 7 is provided to act on the release cylinder 4. The switching cylinder 7 includes a cylinder chamber 8 that communicates the first clutch master cylinder 3 side and the release cylinder 4 side of the first hydraulic system path 1. The spring 9 is biased by the elastic force of the spring 9 to maintain the communication state between the first clutch master cylinder 3 side and the release cylinder 4 side, and the hydraulic pressure from the second hydraulic system path 6 is used to adjust the elastic force of the spring 9. A piston 10 slidably accommodated in the cylinder chamber 8 so as to be able to move forward, and a valve 11 for blocking a flow path toward the first clutch master cylinder 3 in conjunction with the forward movement of the piston 10; It is provided.

  Here, the valve 11 is formed in a rod shape extending in the sliding direction of the piston 10 so as to be able to protrude and retract at the front end portion of the piston 10, and the piston 10 is a cylinder by the elastic force of the spring 9. In a state where the rear end surface of the chamber 8 is offset, the base end portion of the valve 11 is locked to the piston 10 side and resists the resilience of the valve spring 12 to the right side in FIG. The flow path to the first clutch master cylinder 3 is opened by being pulled, but when the piston 10 moves forward by the hydraulic pressure from the second hydraulic system path 6, the elastic force of the valve spring 12 The front end of the valve 11 abuts against the front end surface of the cylinder chamber 8 so that the flow path to the first clutch master cylinder 3 is blocked.

  The second hydraulic system path 6 is connected to a hydraulic unit 14 that generates hydraulic pressure by driving the electric motor 13. The hydraulic unit 14 converts the rotational motion of the electric motor 13 into linear motion. A stroke motor 15 that moves forward and backward, a lever mechanism 16 that is tilted by the stroke motor 15, and a second clutch that generates hydraulic pressure in the second hydraulic path 6 when the push rod 17 is pushed by the lever mechanism 16. A master cylinder 18 is provided.

  That is, the stroke motor 15 can rotate the screw rod 20 via the gear box 19 by the electric motor 13, and is screwed into the screw rod 20 to rotate together by a spline guide (not shown). The advancing / retracting rod 21 guided so as not to move is moved forward and backward by the rotation of the screw rod 20, and the drive of the electric motor 13 is controlled by a control unit 22 at a required place.

  One end of the lever mechanism 16 is pivotally attached to the tip of the advance / retreat rod 21 of the stroke motor 15, and is tilted about the tilt shaft 23 by the advance / retreat of the advance / retreat rod 21. At the same time, the other end is pivotally attached to the tip of the push rod 17 of the second clutch master cylinder 18 so that the push rod 17 moves forward and backward, and when the push rod 17 is pushed in Oil from the reservoir tank 24 is sent to the second hydraulic system path 6 to generate hydraulic pressure.

  Here, the switches 25 and 26 in the hydraulic unit 14 are pushed at a predetermined tilting position by the striker 27 of the lever mechanism 16 to stop the drive of the electric motor 13 and to supply power for forward and reverse rotation of the electric motor 13. The switches 28 and 29 detect the advancing / retreating position of the advancing / retreating rod 21 and input a signal to the control unit 22 as information on whether the clutch is disengaged or connected. It is.

  On the other hand, a power take-off device 31 for taking out engine power in an idling state and driving an auxiliary machine is attached to the transmission 30, and the power take-off device 31 is connected or disconnected by the control unit 22 by electromagnetic of the air pipe 32. The PTO gear is slid to the connection position by opening the valve 33 and applying a negative pressure of a vacuum tank (not shown).

  The state of connection / disconnection of the power take-off device 31 is detected by the position switch 34 and is input to the control unit 22, and the fact that the transmission 30 is neutral is detected and controlled by the neutral switch 35. A signal is input to the unit 22.

  Further, the control unit 22 can be instructed to connect / disconnect the power take-off device 31 wirelessly with a small remote controller 36. When the operator takes the remote controller 36 out of the vehicle, the operator can take the driver's seat. The power take-off device 31 can be connected and disconnected from outside the vehicle even if the vehicle is not in the vehicle.

  Thus, when it is confirmed that the transmission 30 is neutral by the neutral switch 35 when the engine is started, the operator takes the remote control 36 out of the vehicle and instructs the control unit 22 to connect the power take-off device 31. Then, the electric motor 13 of the hydraulic unit 14 is driven by the control unit 22 and the screw rod 20 rotates through the gear box 19, and the advance / retreat rod 21 moves forward to tilt the lever mechanism 16 as shown in FIG. As a result, the push rod 17 is pushed in and hydraulic pressure is generated in the second hydraulic system path 6. At this time, when the switch is turned on, the drive of the electric motor 13 is stopped and the forward and reverse power sources of the electric motor 13 are switched.

  When the hydraulic pressure is generated in the second hydraulic system path 6 in this way, the piston 10 of the switching cylinder 7 moves forward against the elastic force of the spring 9 as shown in FIG. The tip of the valve 11 is abutted against the front end surface of the cylinder chamber 8 by the elastic force of the cylinder and the flow path to the first clutch master cylinder 3 is shut off. Acting on the release cylinder 4, the release cylinder 4 pushes the release fork 5 and the clutch is disengaged.

  On the other hand, when the control unit 22 confirms that the clutch has been disengaged by detecting the advance position of the advance / retreat rod 21 by the switch 28 of the hydraulic unit 14, the control unit 22 opens the electromagnetic valve 33 of the air pipe 32 and the power take-off device. 31 is connected, and when the connection is detected by the position switch 34 and confirmed by the control unit 22, the electric motor 13 of the hydraulic unit 14 is driven in reverse and the screw rod 20 rotates in reverse via the gear box 19. Then, the advance / retreat rod 21 is retracted and the lever mechanism 16 is returned, whereby the push rod 17 is pulled back and the hydraulic pressure in the second hydraulic system path 6 is lost. At this time, when the switch 26 is turned on, the drive of the electric motor 13 is stopped and the forward and reverse power sources of the electric motor 13 are switched.

  When the hydraulic pressure in the second hydraulic system path 6 is lost in this way, the piston 10 of the switching cylinder 7 is pushed back by the elastic force of the spring 9 and is biased to the rear end face of the cylinder chamber 8, and accordingly the valve 11 Since the base end portion of the valve is locked to the piston 10 side and is pulled to the right side in FIG. 1 against the resilience of the valve spring 12, the flow path to the first clutch master cylinder 3 is opened. The hydraulic pressure does not act on the cylinder 4 and the clutch returns to the connected state.

  Note that the clutch connection state is restored by detecting the retracted position of the advance / retreat rod 21 by the switch 29 of the hydraulic unit 14 and the clutch unit is confirmed by the control unit 22, but a confirmation lamp or the like is turned on if necessary. You may do it.

  Further, when disconnecting the power take-off device 31, it is possible for the operator to instruct the control unit 22 to disconnect the power take-off device 31 from the outside of the vehicle by using the remote controller 36. If the unit 22 is instructed to disconnect the power take-off device 31, the clutch is automatically disconnected in the same procedure as described above. However, when the power take-off device 31 is disconnected, the switch 28 of the hydraulic unit 14 is used. When the control unit 22 confirms that the clutch is disengaged by detecting the advance position of the advance / retreat rod 21, the control unit 22 closes the electromagnetic valve 33 of the air pipe 32 and disconnects the power take-off device 31. The subsequent procedure of clutch return by the hydraulic unit 14 is the same as described above.

  Therefore, according to the above embodiment, the power take-off device 31 can be easily connected / disconnected from the outside of the vehicle by the remote controller 36, so that the clutch can be returned to the driver's seat to connect / disconnect the power take-off device 31 as in the prior art. The troublesome work of operating the pedal 2 and the PTO switch can be eliminated, and the work efficiency can be greatly improved by eliminating the need to get on and off the vehicle during the work outside the vehicle.

  Note that the PTO remote connection / disconnection device of the present invention is not limited to the above-described embodiment, and a configuration other than the illustrated example may be adopted for the switching cylinder and the hydraulic unit. Of course, various changes can be made without departing from the scope of the invention.

DESCRIPTION OF SYMBOLS 1 1st hydraulic system path 2 Clutch pedal 3 1st clutch master cylinder 4 Release cylinder 6 2nd hydraulic system path 7 Switching cylinder 8 Cylinder chamber 9 Spring 10 Piston 11 Valve 13 Electric motor 14 Hydraulic unit 15 Stroke motor 16 Lever mechanism 17 Push Rod 18 Second clutch master cylinder 22 Control unit 31 Power take-off device 36 Remote control

Claims (3)

  A PTO remote connection / disconnection device capable of remotely connecting / disconnecting a power take-off device that extracts engine power in an idling state to drive an auxiliary machine, and is operated by depressing a clutch pedal. The first hydraulic system path that generates hydraulic pressure by the release cylinder and disengages the clutch via the release cylinder, and the first clutch master cylinder is provided in the middle of the first hydraulic system path by the hydraulic pressure from another second hydraulic system path A switching cylinder that cuts off the flow path directed to the release cylinder and applies hydraulic pressure from the second hydraulic system path to the release cylinder, a hydraulic unit that generates hydraulic pressure by driving an electric motor in the second hydraulic system path, and the hydraulic pressure Controlling the drive of the electric motor in the unit to disconnect the clutch and connecting and disconnecting the power take-off device at the time of disconnection PTO remote disengaging apparatus characterized by comprising a unit and a remote controller capable of instructing the disconnection of the power take-off device to the control unit wirelessly.   A switching cylinder is connected to the first clutch master cylinder side and the release cylinder side by the cylinder chamber that communicates the first clutch master cylinder side and the release cylinder side of the first hydraulic system path, and the elastic force of the spring. A piston that is slidably accommodated in the cylinder chamber so as to maintain a communication state and to move forward against the elastic force of the spring by the hydraulic pressure from the second hydraulic system path, and in conjunction with the advance of the piston The PTO remote connection / disconnection device according to claim 1, further comprising a valve that blocks a flow path toward the first clutch master cylinder.   The hydraulic unit converts a rotary motion of the electric motor into a linear motion and moves forward and backward, a lever mechanism that is tilted by the stroke motor, and a second hydraulic pressure when the push rod is pushed by the lever mechanism The PTO remote connection / disconnection device according to claim 1, further comprising a second clutch master cylinder that generates hydraulic pressure in the system path.

Images