JPH01182417A - Hydraulic pipe line for tractor - Google Patents

Abstract

PURPOSE:To prevent a pipe line from projecting to a large degree and hanging, by embracing tractor side pipe lines in the rear end part of a vehicle body after a working machine being removed, and then by winding them while coupling them to couplers. CONSTITUTION:A pump side flexible pipe line 63 on the tractor side is laid along one side of a tractor body 1 in the longitudinal direction of the tractor body 1, and a tank side flexible pipe line 66 is laid along the other side of the tractor body 1 in the longitudinal direction of the same. After a working machine being removed from the tractor, the pump side flexible pipe lines 63 and the tank side flexible pipe line 66 on the tractor side are connected to the rear end part of the tractor body 1 by means of couplers 65, 68 provided at the ends of both pipe lines, and are wound and fixed. With this arrangement, it is possible to facilitate the connection of the pipe lines and to prevent the durability of the pipe line from being deteriorated.

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial Application Field) The present invention relates to hydraulic piping for a tractor, and is used to fix and hold the piping on the tractor side when a working machine is removed from the tractor.

(Prior art) A hydraulically driven working machine such as a backhoe is removably connected to a tractor, and the pump-side flexible piping on the tractor side and the pump-side piping on the working machine side are connected and detached via a coupler. Hydraulic piping for a tractor has conventionally been used in which a tank-side flexible piping on the tractor side and a tank-side piping on the working machine side are removably connected via a coupler.

(Problem to be Solved by the Invention) Conventionally, both the pump side and tank side piping on the tractor side are installed along either the left or right side of the tractor body. The following problems occurred when the work equipment was removed from the tractor.

The pump-side piping and tank-side piping must be connected to each other with couplers provided at their ends to form a closed loop.
Work cannot be carried out with a tractor.

However, if both pipes are on the same side of the tractor body, both pipes must be bent when connecting the couplers to each other, and this bending is in a narrow range, resulting in a small bending radius and The lifespan may be shortened.

Further, the small bending radius increases hydraulic piping resistance when connected with a coupler, and there are problems in that the piping greatly protrudes outward from the end of the tractor body and hangs down.

An object of the present invention is to provide a technique for reliably fixing the pump and tank side piping on the tractor side to the end of the tractor body even if the bending radius is large, when the work equipment is removed from the tractor body. It is.

(Means for Solving the Problems) The present invention provides a tractor with a hydraulically driven working machine 33 removably connected to the tractor, and a pump-side flexible pipe 63 on the tractor side and a pump on the working machine 33 side. The side pipe 64 is removably connected via a coupler 65, and the tank-side flexible pipe 66 on the tractor side and the tank-side pipe 67 on the working machine 33 side are removably connected via a coupler 68. In order to achieve the stated purpose in hydraulic piping for a tractor, the following technical measures were taken.

That is, the present invention provides the pump-side flexible piping 6 on the tractor side.
3 is provided along the longitudinal direction of the vehicle body on one side of the tractor body 1, and a tank-side flexible pipe 66 on the tractor side is provided along the longitudinal direction of the vehicle body on the other side of the tractor body 1. When removed, the pump-side flexible piping 63 on the tractor side and the tank-side flexible piping 66 on the tractor side are attached to the end of the tractor body 1.Coupler 65.6 provided at the pipe end
8 are joined and the winding is fixed.

(Function) When the work equipment 33 is removed from the tractor, the pump and tank side piping between the tractor side and the work equipment 33 side is 63°64.
66 and 67 also disconnect couplers 65 and 68.

The pump-side flexible piping 63 and the tank-side flexible piping 66 on the tractor side are wrapped around the ends of the tractor body 1, and couplers 65 and 68 provided at the ends of the pipes are joined and fixed. Hold.

(Example) Hereinafter, the present invention will be described in detail with reference to the illustrated example.
In the figure, reference numeral 1 denotes a tractor body, which includes an engine 2, a transmission case 3, etc., and has front wheels 4 and rear wheels 5.

6 is the hood, 7 is the driver's seat, and 8 is the steering wheel. 9
1 is a hydraulic device for raising and lowering a working machine, and is provided at the rear of the tractor body 1. This hydraulic device 9 has a pair of left and right lift arms 11 that rotate around a hydraulic arm axis IO. 1
Reference numeral 2 denotes a three-point link mechanism, which, as shown in FIGS. 2 and 3, consists of one top link 13 and a pair of left and right lower links 14. The top link 13 has a turnbuckle structure so that it can be expanded and contracted, and its front end is pivotally connected to a top link mount 16 fixed at the center of the upper part of the rear end of the tractor body 1 through a mounting pin 15. A pair of left and right lower links 14 are arranged in a rear-floor shape from the lower rear end of the tractor body 1 toward the rear, and their front ends are attached to a pair of left and right support plates 17 bolted to the tractor body 1 with mounting pins 18. It is pivoted by. Each lower link 14 has
Usually, the lower end of the lift rod 21 is pivotally connected by a pin 20 inserted into the pin hole 19, and the upper end of the lift rod 21 is pivotally connected to each lift arm 11 by a mounting pin 22.

A check chain 23 is connected to each lower link 14 on the rear end side of the pin hole 19, and the check chain 23 is connected to the tractor body 1 side, for example, the rear axle, via a bracket or the like on an extension of the mounting pin 18. It is connected to a case etc.

Reference numeral 24 denotes a front loader mounted on the front part of the tractor body 1, which includes a pair of left and right masts 25, a pair of left and right places 26 protruding forward from each mast 25, and a pair of left and right booms pivotally attached to the upper end of each mast 25. 27, consists of a pair of left and right boom cylinders 28 for raising and lowering each boom 27, a packet 29 pivotally attached to the tip of the boom 27, a pair of left and right packet cylinders 30 for rotating the packet 29, and the like. Each mast 25 is removably attached to mast mounting bases 31 on both sides of the tractor body 1, and each mast 25 is
The front end of the engine 2 is detachably attached to a front axle frame 32 that projects forward from both sides of the engine 2.

Reference numeral 33 denotes a hydraulically driven backhoe (working machine) which is removably attached to the rear of the tractor body 1 and remains fixed when connected, and is attached to the machine frame 34 and can swing left and right around a vertical axis. A swinging frame 35 pivotably mounted, a boom 36 pivotably mounted to the swinging frame 35 for vertical movement, a boom cylinder 37 for raising and lowering the boom 36, an arm 38 pivotally mounted to the tip of the boom 36, and an arm 38. an arm cylinder 39 for bending and extending the packet, a packet 40 pivotally attached to the tip of the arm 38, a packet cylinder 41 for rotating the packet 40, a swing cylinder 42 for swinging the swing frame 35, and a machine frame. It consists of a control box 43 and a driver's seat 44 mounted on the vehicle 34. A pair of left and right outriggers 45 are provided on the machine frame 34.

As shown in FIGS. 2 and 3, the machine frame 34 of the backhoe 33 is attached to the tractor body l via the three-point linkage mechanism 12 and a pair of left and right subframes 51.

That is, a top link mounting bracket 46 is provided at the center of the upper part of the machine frame 34, and a pair of left and right lower link mounting brackets 47 are provided on both sides of the top link mounting bracket 46. The lower link 14 is attached to the latter mounting bracket 47 by the mounting pin 48.
The rear end portions of the two are removably pivotally connected to each other by a mounting pin 49. The lower link 14 has an inclined shape with a rear end located diagonally upward. In addition, the mounting pins 48 and 49 are the third
As shown in the figure, the lower link 14 is arranged on the center axis, but if the lower link 14 is inclined, it may be arranged vertically shifted.

At the bottom of the machine frame 34, a pair of left and right mounting brackets 50 are provided at positions slightly deviated inward from the pair of left and right mounting brackets 47. Reference numerals 51 denote a pair of left and right subframes, which are removably fixed to the support plates 17 on both sides of the tractor body 1 with ports 52 and project rearward from the tractor body 1. are detachably attached to each mounting bracket (50) of the machine frame 34 with bolts 53. In each subframe 51,
The protrusion 54 is slightly deviated to the rear side from the center in the elongated direction.
are provided, and a lift rod 21 is detachably connected to each of the protrusions 54 by a pin 20. The top link 13 and the sub-frame 51 are substantially parallel when viewed from the side, and the sub-frame 51 is provided inward of the lower link 14 so as not to interfere with the lower link 14 when it moves up and down. ing.

Note that in the illustrated example, the lower ends of the pair of left and right lift lofts 21 are connected to the subframe 51, but when the lift arms 11 are in the raised state, the lift rods 21
The lower end of the lower link 14 may be connected to the mounting hole 19 of the lower link 14 with a pin 20.

In FIGS. 2 to 4 and 7, 55 is a pump, which is driven by the engine 2 and is connected to the tractor body 1.
In other words, the oil inside the tank 56 is sent and returned to the tank 56.

That is, the pump side piping 57 is connected to the hydraulic system 9 via the main control valve 58 for the hydraulic system 9, and is also connected to the tank 56. In this case, the pump side piping 57 is connected to the front loader 24. It has a carryover type stack valve 59 for driving the boom cylinder 28 and packet cylinder 30, and further includes a control valve 60 for the backhoe 33 to drive the boom cylinder 37, arm cylinder 39, packet cylinder 41, The swing cylinder 42 and the like can be driven.

In FIG. 1, reference numeral 61 indicates a control lever for the valve 59, and reference numeral 62 indicates a control lever for the control J11 valve 60.

For the backhoe 33, flexible pump-side piping 63, 64 is detachably connected to both the tractor side and the backhoe side via a coupler 65, and flexible tank-side piping 66. 67 are detachably connected via a coupler 68.

Pump side flexible piping 6 on the tractor side for backhoe
3 and the tank-side flexible piping 66 are both connected in the longitudinal direction (front-rear direction) of the tractor body 1 as shown in FIGS. 2 and 3.
The pipes 63 and 66 are attached to the left and right side walls of the tractor body 1 by means of holders (not shown).

Pump side piping 64 and tank side piping 67 on the backhoe side
is divided into left and right by a holder (not shown) and mounted on the machine frame 3.
4 side, and is connected to a control valve 60 in the control box 43, and when the backhoe 33 is used, the corresponding piping 6 is
3.66 are connected with a slack through a coupler 65, and piping 64.67 is connected with a slack through a coupler 68.

When the backhoe 33 is not in use (including when the backhoe is removed from the tractor), the couplers 65 and 68 are removed, and the backhoe side piping 66 and 67 are connected via the couplers 65 and 68, respectively. ,
The tractor-side pipes 63 and 64 are fixedly held at the end of the tractor body 1 (in the embodiment, the rear end, but may also be the front end) in the following manner.

That is, as shown in FIGS. 2 to 4, the piping 63.6
4 are flexible, so they are held in place by being wrapped together inwardly at the end of the tractor body 1 and joined or connected to each other by couplers 65 and 68.

5 and 6 show a backhoe 33 equipped with a safety device that prevents the boom 36 from swinging in the left and right directions about the pivot shaft 69 when the backhoe 33 is not in use.

70 is a pair of left and right suspension systems, each end of which is connected to the machine frame 3.
The mountings on the left and right vertical parts of the boom 36 are removably fixed or pivotably attached to the fixture 71, and the other ends of the boom 36 are detachably fixed or pivotably attached to the fixture 72 (provided that they are removed). By installing the boom 36 as shown in FIG. 5, the left and right swinging of the boom 36 about the pivot shaft 69 is restrained.

The traction device 70 can also have a telescoping turnbuckle structure, or when the backhoe 33 is used, it can be attached to and detached from the control guard frame 73 provided on the control box 43 on the machine frame 34 side. It is advantageous to be able to store it.

In addition, in FIGS. 1 and 4, 74 is a PTO shaft, in FIG. 7, 75 is a relief valve, 76 is a drop adjustment valve, and 77 and 78 are front loader piping.

When installing the backhoe 33 on the tractor body 1, first connect the hydraulic pipes 63 and 64 to the backhoe 33 with the coupler 65, and connect the pipes 66 and 67 with the coupler 68, and connect the left and right outriggers 45 and the boom. 36 to match the height of the machine frame 34.

Next, attach the rear end portions of the pair of left and right subframes 51 to the machine frame 34.
After mounting to the pair of left and right mounting brackets 50 with bolts 53, the top link 13 and the pair of left and right lower links 14 are attached.
The rear end of the rear end is pivoted to each mounting bracket 46, 47 of the machine frame 34 with mounting pins 48, 49. After connecting the lower end of each lift rod 21 to the protrusion 54 of each subframe 51 with the pin 20, the hydraulic device 9 is operated slightly in the raising direction, and the hydraulic device 9 lock.

When removing the backhoe 33, remove it in the reverse order. When the backhoe 33 is removed, the subframe 51 is located inward from the lower link 14, and the lower link 14
Since it is shorter, other work equipment, such as a lowering device, can be attached even if it remains attached.

Furthermore, when the backhoe 33 is not in use (when it is removed), the pipes 63 and 66 on the tractor body 1 side are wrapped around the end of the vehicle body, and are held fixed by joining them with couplers 65 and 68. put. At this time, the relief valve 75
(Even if it does not operate, the oil is returned to the tank 56.

Note that the working machine may be something other than the backhoe 33, and the three-point linkage mechanism 12 may be a front-mounted type in which the working machine is attached to the front of the tractor body 1.

(Effects of the Invention) According to the present invention, when the work equipment is removed, the piping on the tractor side is held fixed by being wrapped around the OF part of the vehicle body and joined with a coupler, so that the piping is large. It doesn't stick out or sag.

In addition, since the piping on the tractor side is divided into left and right parts, the pump side and the tank side, the bending radius is large even when joining with a coupler. There is less damage to the piping, and piping resistance can be reduced.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention, and FIG. 1 is an overall side view, FIG. 2 is a side view of the main parts, and FIG. 3 is the same (plan view), and FIG. 5 is a plan view of the boom rotating section, FIG. 6 is a side view, and FIG. 7 is an overall schematic diagram of the hydraulic circuit. ), 63, 66...Tractor side pump and tank side piping, 64°67...Work equipment side piping, 65.68...
coupler.

Claims (1)

[Claims] (1) A hydraulically driven working machine 33 is removably connected to the tractor, and the pump-side flexible piping 63 on the tractor side and the pump-side piping 64 on the working machine 33 side are connected and detached via a coupler 65. In the hydraulic piping of a tractor, in which a tank-side flexible piping 66 on the tractor side and a tank-side piping 67 on the working machine 33 side are removably connected via a coupler 68, the pump on the tractor side. A side flexible pipe 63 is provided along the longitudinal direction of the vehicle body on one side of the tractor body 1, and a tank side flexible pipe 66 on the tractor side is provided along the longitudinal direction of the vehicle body on the other side of the tractor body 1. When the work equipment 33 is removed, the pump-side flexible piping 63 on the tractor side and the tank-side flexible piping 66 on the tractor side are connected to the end of the tractor body 1 with couplers 65 and 68 provided at both piping ends. Hydraulic piping for a tractor characterized by being wrapped and fixed.