Add-on device to be attached to a lifting vehicle, and method for actuating said add-on device

Abstract

Add-on device (1) to be attached to a lifting vehicle, having a movable fork arm unit (2) comprising at least one fork arm (3), having at least two units (4) for driving a lateral movement of the fork arm unit (2), in particular each comprising at least one drive chain (6), in particular running in opposite directions, wherein the drive chain (6) is in particular assigned to a respective fork arm (3), having in each case at least one hydraulic motor (11), by which the unit can be driven, wherein the hydraulic motors (11) of two units (4) can be connected in parallel for a lateral movement of the fork arms (3) in the same direction and/or the hydraulic motors (11) of two units (4) can be connected in series for a lateral movement of the fork arms (3) in opposite directions. Method for actuating said add-on device (1).

Claims

1. Attachment device (1), which is to be attached to a lifting vehicle, with a movable fork apparatus (2) comprising at least one fork (3), with at least two devices (4) for driving of a lateral movement of the fork apparatus (2), in particular each comprising at least one driving chain (6), in particular arranged for opposite movement, wherein the said driving chain is in particular associated with one fork (3) respectively, each with at least one oil motor (11), with which the device is to be driven, wherein for a lateral rectified movement of the forks (3) the oil motors (11) of two devices (4) can be arranged in a parallel connection and/or for a lateral oppositely directed adjustment of the forks (3) the oil motors (11) of two devices (4) can be arranged in a series connection; and wherein characterized by that in series connection of the oil motors (11) a valve is provided for limiting the pressure built-up in the oil motors (11) arranged in particular in the lifting vehicle.

2. Attachment device according to claim 1, characterized by that in parallel connections of the oils motors (11) an hydraulic end-switch for the oil motors is provided.

3. Attachment device according to claim 1, characterized by that the device (4) has at least one tensioning device (5), comprising at least one hydraulic piston (8), which is acted on by oil of the oil motor (11), which is associated with the fork (3), through which the driving chain (6) is to be held at a predetermined tension, wherein in particular the device (4) is associated with a deflection roller (7), on which the driving chain (6) is deflected and which is stretched by the hydraulic piston (8).

4. Attachment device according to claim 1, characterized by that the hydraulic piston is a plunger cylinder, wherein the tension of the device is to be held by pressure force of the plunger cylinder and/or the hydraulic piston is a differential cylinder, wherein the tension of the device is to be held by tensile force of the differential cylinder.

5. Attachment device according to claim 1, characterized by that the pressure generated in the hydraulic piston (8) is held by a pressure-holding device, in particular a non-return valve.

6. Attachment device according to claim 1, characterized by that a pre-tensioning valve is provided in front of at least one hydraulic piston (8) , wherein in particular the pre-loading valve is provided in combination with a non-return valve.

7. Attachment device according to claim 1, characterized by that a pressure limiting valve is provided, via the oil from the hydraulic piston (8) can escape, in particular in the case of a damage.

8. Attachment device (1), which is to be attached to a lifting vehicle, with a movable fork apparatus (2) comprising at least one fork (3), with at least two devices (4) for driving of a lateral movement of the fork apparatus (2), in particular each comprising at least one driving chain (6), in particular arranged for opposite movement, wherein the said driving chain is in particular associated with one fork (3) respectively, each with at least one oil motor (11), with which the device is to be driven, wherein for a lateral rectified movement of the forks (3) the oil motors (11) of two devices (4) can be arranged in a parallel connection and/or for a lateral oppositely directed adjustment of the forks (3) the oil motors (11) of two devices (4) can be arranged in a series connection; and characterized by that a longitudinal transport device for longitudinal transport of goods is provided arranged along at least one fork (3), wherein the longitudinal transport device in particular comprises a transport chain, wherein in particular a tensioning device (5) with a hydraulic piston (8) is provided for tensioning the transport chain actuated by the oil in the oil motor (11), wherein the longitudinal transport device, is in particular connectible by means of a solenoid valve.

9. Method for actuating an attachment device (1), which is to be attached to a lifting vehicle, with a movable fork apparatus (2) comprising at least two forks (3), with at least two devices (4) by which a lateral movement of the fork apparatus (2) is driven, in particular each comprising at least one driving chain (6), in particular arranged for opposite movement, wherein the said driving chain is in particular associated with one fork (3) respectively, each with at least one oil motor (11), with which the device is driven, wherein for a lateral rectified movement of the forks (3) the oil motors (11) of two devices (4) are arranged in a parallel connection and/or for a lateral oppositely directed adjustment of the forks (3) the oil motors (11) of two devices (4) are arranged in a series connection; and characterized in that in series connection of the oil motors (11) a valve arranged in particular in the lifting vehicle limits the built-up pressure in the oil motors (11) and/or in a parallel connection of the oil motors (11) a hydraulic end switch respectively switches off the oil motors (11) in the end position.

Description

(1) It is shown in

(2) FIG. 1 an attachment device with drive chains in perspective view,

(3) FIG. 2 an attachment device with drive chains in perspective view,

(4) FIG. 3 an attachment device with drive chains in perspective view and

(5) FIG. 4 an attachment device with drive chain in plan view.

(6) FIG. 1 shows an attachment device 1, which is to be attached to a lifting vehicle, comprising drive chains 6 in perspective view. The attachment device 1 has, for example, two arrays of driving chains 6, two adjacent and synchronously respectively. On these double-arranged driving chains 6 retaining devices 9 for a movable fork apparatus 2 are arranged, in particular each comprising at least one fork prong, as shown in FIG. 4.

(7) The driving chains 6 are exemplary devices 4 for driving for a lateral movement of the fork apparatus 2, wherein the driving chain 6 is in particular related to a fork respectively, represented by their holding device 9, each having at least one oil motor 11, by which the device 4 to be driven, wherein for a lateral rectified movement of the forks the oil motors 11 of two devices 4 can be set up in a parallel connection and/or for a lateral oppositely directed adjustment of the forks the oil motors 11 of two devices 4 can be set up in a series connection.

(8) The two oil motors 11 are inserted for example in the opposite direction with respect to a direction of rotation of the oil motor 11, whereby a very compact construction form is achieved.

(9) The device has at least one tensioning device 5, comprising at least one hydraulic piston 8, which is acted on by the oil of the oil motor 11, which is associated to the holding device 9 of the fork, by means of which the driving chain 6 is to be held on a preset tension, wherein in particular the device 4 is assigned with a deflection roller device 7, on which the driving chain 6 is to be deflected and which is to be tensioned by the hydraulic piston 8.

(10) The attachment device in FIG. 1 shows an end-side, rectified position of the holding devices 9.

(11) FIG. 2 shows an attachment device 1 with driving chains 6 of a device 4 in perspective view. The attachment device 1 has an end-side, opposite position of the holding devices 9.

(12) FIG. 3 shows an attachment device with driving chains in perspective view. The attachment device in FIG. 1 has relative to FIG. 1 at an opposite end stop 10 arranged end-sided, rectified position of the holding devices 9.

(13) FIG. 4 shows an attachment device 1 with driving chain 6 in plan view. FIG. 4 shows an attachment device 1 comprising a fork apparatus 2 on holding devices 9 with at least one fork 3. A fork 3 for example has a longitudinal transport device 4 for example in the form of a toothed belt. The transporting movement is achieved, for example, by the oil motor 11.

REFERENCE CHARACTER LIST

(14) 1 attachment device 2 fork apparatus 3 fork 4 device 5 tensioning device 6 driving chain 7 deflection roller installation 8 hydraulic piston 9 holding device 10 end stop 11 oil motor 12 longitudinal transport device