JPH0124211Y2 - - Google Patents

Description

[Detailed description of the invention] The present invention is to attach a slide bracket to which a backhoe device is attached so that it can slide only in the lateral direction of the vehicle body on the frame on the side of the vehicle body, and to attach a hydraulic pusher that fixes the slide bracket to the slide bracket with its piston rod. The present invention relates to a slide bracket fixing portion of a backhoe work vehicle, which is attached so as to be in contact with the frame.

Conventionally, in the above-mentioned backhoe work vehicle, the slide bracket is fixed as shown in Fig. 4.
With the piston rod 13 of the pusher 14 inserted into the hole 16 formed in the slide bracket 12 from the side opposite to the frame 11 on the vehicle body side, insert the cylinder tube 17 of the pusher 14 into the side of the slide bracket 12 opposite to the frame 11 on the vehicle body side. In this case, the bolts 20 were used to connect and fix the bolts, but since the reaction force of the pusher 14 against the vehicle frame 11 concentrated on the bolts 20,
There was room for improvement in terms of durability and reliability, such as the bolts 20 becoming rattled during long-term use and interfering with the function of fixing the slide bracket 12, and the bolts 20 being deformed and damaged.

In view of the above-mentioned circumstances, the purpose of the present invention is to make reasonable improvements to the pusher mounting structure, to greatly improve the support strength of the pusher, and to maintain its fixing function well over a long period of time. The point is to make it so.

The characteristic configuration of the slide bracket fixing part of the present invention is that in the above-mentioned backhoe work vehicle, the cylinder tube of the hydraulic pusher is installed in the mounting hole formed in the slide bracket, and the cylinder tube portion having a larger diameter than the hole is attached to the frame. The reason for this is that it is fitted in so as to be located on the side and in contact with the slide bracket, and its functions and effects are as follows.

In other words, by attaching the cylinder tube to the slide bracket with the cylinder tube portion, which has a larger diameter than the mounting hole, located on the vehicle body frame side and in contact with the slide bracket, the pushing reaction force of the pusher against the vehicle body frame is reduced. All of the above can be reliably received by the abutting action of the slide bracket against the large diameter portion of the cylinder tube, so that no pressing reaction force is applied to the connecting tool such as a bolt for connecting and fixing the pusher to the slide bracket. As a result, it is possible to reliably prevent rattling and deformation damage of the bolt connector due to pressure reaction force, greatly increasing the durability of the pusher mounting structure and the reliability of the slide bracket fixing function by the pusher. I was able to improve my skills.

Next, embodiments of the present invention will be described in detail based on illustrative drawings.

As shown in FIG. 1, a pair of left and right driving front wheels 1
a front vehicle body 2 equipped with a
The rear vehicle body 4 is connected to the rear vehicle body 4 so as to be able to swing relative to each other around the vertical axis _P1 , and a hydraulic cylinder 5 installed across both vehicle bodies 2 and 4 adjusts the amount of movement of the steering wheel 6 according to the amount of operation of the steering handle 6. Only both car bodies 2 and 4
The front vehicle body 2 is equipped with a front shovel device 7 that can be freely raised and lowered, and the rear vehicle body 4
It is equipped with a tower driving section 8, a driving section 9, and a backhoe device 10, thereby forming an earthmoving vehicle for transporting earth and sand, etc. and excavating.

To configure the attachment structure of the backhoe device 10 to the rear vehicle body 4, as shown in FIGS. 1 to 3, a pair of upper and lower left and right horizontal frames 11a and 11b are provided at the rear end of the rear vehicle body 4. The backhoe device 10 is arranged and fixed in a parallel manner over almost the entire width of the aircraft body, and the backhoe device 10 is arranged vertically on the axis.
The slide bracket 12, which is pivotably connected around P ₂ , is slid across the upper and lower frames 11a and 11b in a state where it can only freely slide in the width direction of the fuselage guided by the upper and lower frames 11a and 11b. It is also connected from the rear of the aircraft.

Then, the piston rod 13 is pressed into contact with the rear surface of the lower frame 11b by hydraulic operation, and the upper and lower frames 11a, 11 of the slide bracket 12 are moved.
Two pushers 14 are attached to the slide bracket 12 to prevent the machine from sliding at an appropriate sliding position, and cylinders of a pair of left and right hydraulically operated outrigger devices 15 support the machine body on the ground during excavation work by the backhoe device 10. Case 15a
are connected and fixed across the left and right lateral ends of the upper and lower frames 11a and 11b, respectively, while also being used as stoppers for regulating the left and right end positions of the lateral sliding of the slide bracket 12. The horizontal sliding function and sliding fixing function of the backhoe device 10 widen the working range in the width direction of the machine body and improve excavation workability. 1
The backhoe device 10, which has been moved to one horizontal side of 1b and bent, is rotated around the vertical axis _P2 along the width direction of the fuselage, so that it is approximately within the width dimension of the fuselage. It is constructed so that the backhoe device 10 can be stored compactly.

Slide bracket 12 of the pusher 14
As shown in FIG. 3, the slide bracket 12 has a large diameter portion that opens toward the lower frame 11b and a small diameter portion that opens toward the opposite side of the lower frame 11b. A stepped cylindrical mounting hole 16 is formed concentrically with the cylinder tube 17, and the outer circumferential shape of the cylinder tube 17 is changed to match the large diameter portion 17 on the piston rod 13 side.
a fits into the large diameter portion of the mounting hole 16, and
The small diameter portion 17b on the bottom side is formed into a stepped cylindrical shape that fits into the small diameter portion of the attachment hole 16. Then, the cylinder tube 17 is fitted into the mounting hole 16 from the lower frame 11b side so that the stepped portion of the mounting hole 16 and the stepped portion of the cylinder tube 17 are in contact with the opposing surfaces, and the large diameter portion of the cylinder tube 17 is 17a and slide bracket 12
The cylinder tube 17 is prevented from rotating by the front-to-back notch pin 18 that has been inserted, and
The pusher 14 is fixed to the slide bracket 12 with the ring-shaped clip 19 attached to the cylinder tube 17 preventing the cylinder tube 17 from coming off toward the lower frame 11b, and then the piston rod 13 is fixed to the lower frame 11b.
The support strength of the pusher 14 is improved by ensuring that the pressure reaction force against the pusher 14 is reliably received at the stepped portion where the opposing surfaces of the mounting hole 16 and the cylinder tube 17 are in contact with each other.

It should be noted that various improvements can be made to the specific structure of the vehicle body frame 11 that guides the lateral sliding of the slide bracket 12, and various improvements can also be made to the connection structure of the slide bracket 12 to the vehicle body frame 11. It is possible.

Further, in the fitting structure of the cylinder tube 17 with the large diameter portion 17a of the cylinder tube having a larger diameter than the mounting hole 16 located on the vehicle body frame 11 side and in contact with the slide bracket 12,
The shape of the mounting hole 16 formed in the slide bracket 12 and the shape of the cylinder tube 17 fitted therein may be prismatic instead of cylindrical, or the large diameter portion 17a of the cylinder tube may be fitted inside. Various improvements can be made, such as omitting the large diameter portion of the mounting hole 16 and bringing the cylinder tube large diameter portion 17a into direct contact with the outer surface of the slide bracket 12.

[Brief explanation of the drawing]

The drawings show an embodiment of the slide bracket fixing part of a backhoe work vehicle according to the present invention, with Fig. 1 being an overall side view, Fig. 2 being a partially omitted perspective view showing the mounting structure of the slide bracket, and Fig. 3 being a pusher. FIG. 4 is an enlarged vertical cross-sectional view showing the mounting structure of FIG. 4, which corresponds to FIG. 3 showing the conventional structure. 10... Backhoe device, 11... Frame,
12... Slide bracket, 13... Piston rod, 14... Pusher, 16... Mounting hole,
17...Cylinder tube.

Claims (1)

[Scope of utility model registration request] A slide bracket 12 to which the backhoe device 10 is attached is attached to the vehicle body side frame 11 so that it can only slide freely in the lateral direction of the vehicle body, and a hydraulic pusher 14 for fixing the slide bracket 12 to the slide bracket 12.
In a backhoe work vehicle in which the piston rod 13 is attached so as to be in contact with the frame 11, the cylinder tube 17 of the hydraulic pusher 14 is inserted into the mounting hole 16 formed in the slide bracket 12 with a diameter larger than that of the hole 16. A slide bracket fixing portion of a backhoe work vehicle, in which the cylinder tube portion 17a of the cylinder tube portion 17a is positioned on the frame 11 side and is fitted into the slide bracket 12 so as to be in contact with the slide bracket 12.