JPH0663594U - Oil feeder for aerial work vehicles - Google Patents

Abstract

(57) [Abstract] [Purpose] The intermediate support shaft 3
Has a workbench 7 attached to the upper end of an elevating mechanism 5 in which a plurality of X-type link mechanisms 4 pivotally connected to each other in the vertical direction are connected, and a hydraulic cylinder 8 for raising and lowering is mounted on the upper side of the X-axis mechanism. To shorten the oil supply hose for supplying and discharging hydraulic oil between the hydraulic unit 10 and the hydraulic cylinder 8 arranged on the side of the vehicle 6 used for the aerial work vehicle attached to the die link mechanism 4. [Structure] The intermediate support shaft 3 of the lower X-type link mechanism 4 in the elevating mechanism 5 or one of the pair of links 1 and 2 constituting the lower X-type link mechanism 4;
In the vicinity of the intermediate support shaft 3 of the vehicle, a hose support bar 13 having an intermediate portion pivotally connected so as to be swingable is attached.
The hydraulic hose 11 for supplying / discharging hydraulic fluid from the hydraulic unit 10 arranged in FIG.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 SUMMARY OF THE INVENTION The present invention provides an elevating mechanism including a plurality of vertically extending X-type link mechanisms which are pivotally connected to each other in the longitudinal direction of a pair of links by an intermediate support shaft so as to be connected to each other. An aerial work vehicle that is mounted on the top and the work platform attached to the upper end of this lifting mechanism is lifted and lowered by the lifting mechanism. In particular, a hydraulic cylinder that drives the lifting mechanism up and down is used as the upper X-type link mechanism. The present invention relates to an oil feeding device used for an aerial work vehicle that is installed.

[0002]

[Prior art]

 An aerial work vehicle to which the oil feeding device of the present invention is applied will be described with reference to FIG. In FIG. 2, an aerial work vehicle A has a plurality of X-type link mechanisms 4 in which the intermediate portions of a pair of links 1 and 2 are pivotally connected to each other by an intermediate support shaft 3 so as to rotate upward and downward. An elevating mechanism 5 configured by connecting in parallel is mounted on a vehicle 6, and a workbench 7 attached to the upper end of the elevating mechanism 5 is moved up and down by the elevating mechanism 5. Reference numeral 8 is a hydraulic cylinder for driving the lifting mechanism 5 up and down. The hydraulic cylinder 8 is attached to the X-shaped link mechanism 4 on the upper stage side of the lifting mechanism 5. That is, one end of the hydraulic cylinder 8 is pivotally connected to an appropriate position of the link 1 of the pair of links 1 and 2 forming the X-type link mechanism 4 on the upper stage side, and the other end thereof is connected to the upper stage side. The pair of links 1 and 2 constituting the X-shaped link mechanism 4 is pivotally connected to the other link at a proper position 8b.

In the example of FIG. 2, in order to drive the elevating mechanism 5 up and down, another hydraulic cylinder 9 different from the hydraulic cylinder 8 attached to the upper X-type link mechanism is attached. . That is, one end of the hydraulic cylinder 9 is pivotally connected 9a to an appropriate position of one of the pair of links 1 and 2 forming the X-type link mechanism 4 on the lower stage side, and the other end of the hydraulic cylinder 9 is connected to the lower stage. The link 1 and the pair of links 1 and 2 constituting the X-shaped link mechanism 4 on the side are pivotally connected 9b at appropriate positions so that the elevator mechanism 5 can be moved up and down in cooperation with the hydraulic cylinder 8. Has become.

A hydraulic unit 10 (including a hydraulic control valve) that generates a hydraulic pressure for vertically moving the lifting mechanism 5 is attached to the vehicle 6, and the hydraulic unit 10 and the X on the upper stage side are attached. The hydraulic cylinder 8 attached to the mold link mechanism 4 and the hydraulic cylinder 9 attached to the lower X-type link mechanism 4 are connected via hydraulic hoses 11 and 12 for supplying and discharging hydraulic oil. Such aerial work vehicles are well known.

By the way, in the above conventional aerial work vehicle A, the oil feeding device between the hydraulic unit 10 and the hydraulic cylinder 8 attached to the X-type link mechanism 4 on the upper stage side has the hydraulic hose 11 on the lower stage side. After a loose bend is provided at the connecting portion between one of the links 1 of the X-type link mechanism 4 and the vehicle 6, it is fixed along the link 1 of the X-type link mechanism 4 on the lower stage side. The X-type link mechanism on the directly upper stage side is provided after the connecting portion at the lower end of the link 2 of the X-type link mechanism 4 on the directly upper side connected to the upper end of the link 1 of the type link mechanism 4 has a loosely curved portion. It was arranged along the link 2 of 4.

[0006]

[Problems to be solved by the device]

 However, in the oil feeding device configured from the hydraulic unit 10 to the hydraulic cylinder 8 attached to the X-shaped link mechanism 4 on the upper stage side of the lifting mechanism 5, the hydraulic hose 11 is provided at each stage. Since it is necessary to fix the one side link 1 or 2 of the X-type link mechanism 4 along the substantially entire length, the hydraulic hose 11 has a problem that the total length becomes long and the cost becomes high. An object of the present invention is to provide a new oil feeding device between the hydraulic unit 10 and the hydraulic cylinder 8 so as to reduce the total length of the hydraulic hose 11 as compared with the conventional oil feeding device.

[0007]

[Means for Solving the Problems]

 In order to achieve the above-mentioned object, the oil feeding device for an aerial work vehicle of the present invention comprises an intermediate support shaft 3 of an X-shaped link mechanism 4 on the lower stage side of the lifting mechanism 5 or an X-shaped link 4 on the lower stage side. A hose support bar having an intermediate portion pivotally connected to the intermediate support shaft 3 is attached to a position near one of the intermediate support shafts 3 of one of the pair of links 1 and 2 to be arranged on the vehicle 6. The hydraulic hose 11 for supplying and discharging hydraulic oil from the hydraulic unit 10 to the hydraulic cylinder 8 is fixed along the hose support bar in the middle thereof.

[0008]

[Action]

 The oil feeding device for an aerial work vehicle of the present invention configured as described above is a hydraulic hose arranged between the hydraulic unit 10 mounted on the vehicle 6 and the hydraulic cylinder 8 mounted on the upper X-type link mechanism. Since the middle of 11 is fixed along the intermediate support shaft 3 of the lower X-type link mechanism 4 or a hose support bar which is swingably attached near the intermediate support shaft 3, the lifting mechanism 4 is driven upward. In this state, since the hose support bar swings in the vertical posture, the hydraulic hose 11 can connect the hydraulic unit 10 and the hydraulic cylinder 8 via a short path.

[0009]

【Example】

 An embodiment of an oil feeding device for an aerial work vehicle according to the present invention will be described below with reference to FIG. The characteristic part of the oil supply device of the present invention is that the method of supporting the middle part of the hydraulic hose 11 in the conventional oil supply device is changed, and therefore the above-mentioned symbols and descriptions are also applied in the following description except for this point. Incorporated.

In FIG. 1, reference numeral 13 denotes a hose support bar having an intermediate portion pivotally connected to an intermediate support shaft 3 of a lower X-type link mechanism 4 so as to be swingable. The hydraulic hose 11 that supplies and discharges the hydraulic oil from the hydraulic unit 10 arranged in the vehicle 6 to the hydraulic cylinder 8 (the hydraulic cylinder that drives the lifting mechanism 5 up and down) attached to the upper X-type link mechanism 4 is The inside is fixed along the hose support bar 13. The hydraulic hose 11 is connected to the vehicle 6 side and the hydraulic cylinder 8 side (to the hydraulic hose 11 with the hose support bar 13 swinging in the vertical direction when the elevating mechanism 5 is raised (the state shown in FIG. 1). The length is set so that the shortest possible connection is possible (leaving some slack). In a state where the lifting mechanism 5 is lowered (the links 1 and 2 of the X-type link mechanisms 4 and 4 are substantially horizontal, and is indicated by a chain double-dashed line in FIG. 1), the hose support bar is 13 is also almost horizontal.

In the above embodiment, the hose support bar 13 has been described as having its middle portion swingably attached to the middle support shaft 3 of the X-type link mechanism 4 on the lower stage side. The center portion of the base support bar 13 is swingable to a position in the vicinity of the intermediate support shaft 3 on one of the links (1 or 2) of the pair of links 1 and 2 forming the lower X-shaped link 4. Of course, it may be attached to.

[0012]

[Effect of device]

 The oil feeding device for an aerial work vehicle of the present invention, which is constructed and operates as described above, has a very simple structure, but has a conventional structure for supplying / discharging hydraulic oil to / from the hydraulic cylinder arranged in the upper X-shaped link mechanism. Since it can be done with a shorter hydraulic hose, the cost can be reduced.

[Brief description of drawings]

FIG. 1 is an explanatory view of an oil feeding device for an aerial work vehicle according to the present invention.

FIG. 2 is an explanatory view of a conventional oil feeding device for an aerial work vehicle.

[Explanation of symbols]

1, 2; link, 3; intermediate support shaft, 4; X-type link mechanism,
5; lifting mechanism, 6; vehicle, 7; workbench, 8; hydraulic cylinder (arranged in the X-shaped link mechanism on the upper end side), 8a;
Pivot connection, 8b; Pivot connection, 9; Hydraulic cylinder (arranged in the lower X-shaped link mechanism), 9a; Pivot connection, 9b; Pivot connection, 10; Hydraulic unit, 11; Hydraulic hose, 12; hydraulic hose, 13; hose support bar,

Claims (1)

[Scope of utility model registration request] 1. A plurality of X-type link mechanisms 4 are formed by vertically connecting a pair of links 1 and 2 to each other in the longitudinal direction so as to be pivotally connected to each other by an intermediate support shaft 3. The lifting mechanism 5 is mounted on the vehicle 6, and the lifting mechanism 5
An aerial work vehicle A in which a work table 7 attached to the upper end of the work platform is lifted and lowered by the lifting mechanism 5,
In which a hydraulic cylinder 8 for driving up and down is attached to the X-type link mechanism 4 on the upper stage side, the intermediate support shaft 3 of the X-type link mechanism 4 on the lower stage side of the elevating mechanism 5 or the X-type on the lower stage side. A hose support bar 13 having an intermediate portion pivotably connected to the intermediate support shaft 3 is attached to one of the links 1 or 2 of the pair of links 1 and 2 constituting the link mechanism 4 in the vicinity of the intermediate support shaft 3 to mount the vehicle. An oil feeding device for an aerial work vehicle, characterized in that a hydraulic hose 11 for supplying and discharging hydraulic oil from a hydraulic unit 10 arranged in 6 is fixed along the hose support bar 13.