JPH0565071A - Hydraulic cylinder mounting structure - Google Patents

Abstract

PURPOSE:To provide a hydraulic cylinder mounting structure, which can hinder burnout of a resin bushing in a sphere joint part and which ensures easy dismantling works. CONSTITUTION:A hydraulic cylinder 5 of single rod type is mounted in such a way as set over between a fixation part and a driven member through sphere joints 16, 18, wherein a sphere joint coupling member 20 of a cylinder body 5a is coupled by screw with a sealing member 21, which is welded to the end of the cylinder body 5a.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a hydraulic cylinder mounting structure in which a single rod type hydraulic cylinder is laid across a fixed portion and a driven member via a ball joint.

[0002]

2. Description of the Related Art In the above-mentioned hydraulic cylinder mounting structure,
Conventionally, the sealing member to be welded and fixed to the end portion of the cylinder body of the hydraulic cylinder and the ball joint connecting portion are connected by welding.

[0003]

However, in the above conventional structure, since the ball joint connecting portion is connected by welding, the temperature of the ball joint connecting portion becomes high during the connecting work, and the ball joint portion is heated. There is a risk that the resin bushes that are deployed in the tank may melt and be damaged, and that the removal of the hydraulic cylinder requires disconnection of the ball joints, which makes the operation cumbersome. there were. The present invention aims to eliminate the above-mentioned problems.

[0004]

According to a characteristic construction of the present invention, in the hydraulic cylinder mounting structure described at the beginning, a ball joint connecting member of the cylinder body of the hydraulic cylinder is welded and fixed to an end portion of the cylinder body. The point is that it is screwed to the sealing member.

[0005]

[Function] Since the cylinder body and the sealing member for sealing the hydraulic oil are fixed by welding in advance, the ball joint connecting member is screwed and connected to the sealing member. The high fever of is not transmitted. or,
When installing or removing the hydraulic cylinder, the work can be easily performed by simply screwing the connection or releasing the screw connection.

[0006]

Therefore, even if a resin bush is used for the ball joint portion, there is no risk of damage to the resin bush due to high heat, and when connecting at the ball joint portion where the connection work is difficult to perform. In comparison, the work of mounting or removing the hydraulic cylinder can be easily performed, and the workability of assembling can be improved.

[0007]

Embodiments will be described below with reference to the drawings. Figure 7
Shows an agricultural tractor. This agricultural tractor is equipped with an all-hydraulic power steering mechanism. Steering drive in which pressure oil from a steering valve 3 arranged below the control panel 2 is arranged between the left and right front wheels 4 based on the operation of the steering handle 1. It is configured to be supplied to the hydraulic cylinder 5 for steering to steer the front wheels 4.

As shown in FIGS. 4 and 5, a balance weight 9 is formed on the front wall portion 8 of the U-shaped front frame 7 which is connected to the left and right side portions of the engine 6 and which is also used as a battery mounting table. And the front frame 7 is divided into two parts in the front and rear, and the hydraulic cylinder 5 is provided on the inner side of the front frame 7a. Further, a notch 10 for passage of the cylinder linking mechanism is formed at the cylinder disposition portion of the front frame 7a. A pair of left and right rear side frames 7b
A connecting plate 11 is erected and connected across the lower parts on the front side of the front axle case 12, and the front axle case 12 is attached and connected to the lower side of the connecting plate 11. In the case of the manual steering operation specification, the front side frame 7a is replaced with a notch-type one as shown in FIG. A front side attachment 14 of a mounting support member 13 of the frame loader is screwed to the left and right lateral portions of the balance weight 9.

As shown in FIGS. 1 to 3, the hydraulic cylinder 5 is constructed as a single rod type, and its cylinder body 5a has a ball joint 16 in a bracket 15 (an example of a fixing portion) fixed to the front axle case 12. The cylinder rod 5b is pivotally connected to a knuckle arm 17 (one example of a driven member) on one side via a ball joint 18.
The left and right knuckle arms 17, 17 are interlockingly connected by a tie rod 19, and the left and right front wheels 4 are respectively steered around the longitudinal axis by the expansion and contraction operation of the hydraulic cylinder 5. Then, the ball joint connecting member 20 of the cylinder body 5a is screwed and connected to the sealing member 21 welded and fixed to the end portion of the cylinder body 5a, and the cylinder rod 5
The ball joint connecting member 22 of b is screwed and connected to the tip of the cylinder rod 5b.

It should be noted that reference numerals are added to the claims for facilitating the comparison with the drawings, but the present invention is not limited to the configurations of the accompanying drawings by the entry.

[Brief description of drawings]

FIG. 1 is a plan view of a hydraulic cylinder arrangement portion.

FIG. 2 is a front view of a hydraulic cylinder arrangement portion.

FIG. 3 is a sectional view of a hydraulic cylinder

FIG. 4 is an exploded perspective view showing a frame structure.

FIG. 5 is a side view of the front part of the agricultural tractor.

FIG. 6 is a side view of the front part of the agricultural tractor in the manual steering operation specification.

FIG. 7: Side view of the entire agricultural tractor

[Explanation of symbols]

 5 Hydraulic Cylinder 5a Cylinder Main Body 15 Fixed Part 16,18 Ball Joint 17 Driven Member 20 Ball Joint Connecting Member 21 Sealing Member

Claims (1)

[Claims] 1. A hydraulic cylinder in which a single rod type hydraulic cylinder (5) is laid across a fixed portion (15) and a driven member (17) via ball joints (16) and (18). The mounting structure is a ball joint connecting member (2) of the cylinder body (5a) of the hydraulic cylinder (5).
0) is attached to a sealing member (21) that is welded and fixed to the end of the cylinder body (5a) by screwing and connecting the hydraulic cylinder.