JP2537718Y2 - Power cylinder mounting structure for axle - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a structure for attaching a power cylinder to an axle in a vehicle having a power cylinder built in the axle.

[0002]

2. Description of the Related Art A conventional rear axle with a built-in power cylinder will be described with reference to FIGS. 2 to 4. A rear axle body 1 is provided with a mounting member 2 and a duffle rod type power cylinder 4 mounted on a mounting member 2 via a cylinder bracket 3. And the rear axle body 1 via the kingpin 5
The piston rod 4a of the power cylinder 4 is connected to the knuckle arm 7 of the knuckle 6 via a side rod 8 with a pin.

As shown in FIG. 4, a pair of left and right cylinder brackets 3 for mounting a power cylinder 4 to the mounting member 2 has a hole 3a which is externally fixed to a casing of the power cylinder 4, and a power cylinder. A hydraulic port 9 communicating with the oil chamber 4 is formed on the mounting surface 3b side, and a pair of female screw holes 3c for mounting the cylinder bracket 3 to the mounting member 2 with fixing bolts 10 on both sides of the hydraulic port 9 on the mounting surface 3b. Is formed.
On the other hand, the mounting member 2 has a bolt hole 11 corresponding to the female screw hole 3c and a port relief hole 12 corresponding to the hydraulic port 9.

[0004]

[Problems to be Solved by the Invention] When mounting a power cylinder on an axle, it is customary to mount it with two fixing bolts for each cylinder bracket. In particular, since the turning angle of the wheel cannot be obtained due to poor precision in the direction of expansion and contraction, as shown by the imaginary line in FIG. 4, the knock pin 13 is protruded from the mounting surface 3b of the cylinder bracket 4 or the fixing bolt is fixed. 11 uses a reamer bolt to increase the mounting accuracy. However, installation of the dowel pin 13 and processing of the pin hole 14 require labor and labor, and also in the case of a reamer bolt, processing accuracy is required and the cost is increased.

SUMMARY OF THE INVENTION It is an object of the present invention to solve the above-mentioned problems and to provide a structure for mounting a power cylinder to an axle, which can improve the mounting accuracy of a power cylinder by a simple improvement.

[0006]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present invention is to fix a cylinder bracket having a hydraulic port which is externally fitted and fixed to a power cylinder and which communicates with an oil chamber via a fixing bolt. In the power cylinder mounting portion to the axle to be mounted on the mounting member of the axle body, a positioning protrusion is formed at a position where the hydraulic port is formed on the mounting surface of the cylinder bracket, the positioning protrusion protruding toward the mounting member, and is positioned on the mounting member. A positioning hole that also serves as a port relief hole into which the projection fits is formed.

[0007]

According to the above construction, the opening portion of the hydraulic port is used as the positioning projection, and the port escape hole is used as the positioning hole. In addition, the use of knock pins, pin holes, and reamer bolts, which have been conventionally required, is not required, and the positioning of the power cylinder can be accurately performed with a simple structure, and the manufacturing cost can be reduced.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a power cylinder mounting structure for an axle according to the present invention will be described below with reference to the drawings.
The same members as those in the conventional example are denoted by the same reference numerals, and description thereof will be omitted.

Reference numeral 21 denotes a mounting surface 3 of the cylinder bracket 3.
A cylindrical positioning protrusion protruding toward the mounting member 2 at a position where the hydraulic port 9 opens at b, and the hydraulic port 9 is opened at the tip end surface. A port release hole formed at a position corresponding to the hydraulic port 9 of the mounting member 2 is formed in a positioning hole 22 that can position the cylinder bracket 3 by fitting the positioning projection 21 and is also used as a port release hole. A hydraulic pipe (not shown) is connected to the hydraulic port 9 through the positioning hole 22.

According to the above configuration, the accuracy of the outer diameter of the positioning projection 21 and the position and inner diameter of the positioning hole 22 is processed to be high enough to be positioned, so that the conventionally required knock pin and pin hole, or The processing of the reamer bolt and the reamer bolt hole is not required, and the mounting accuracy of the cylinder bracket 3 can be improved by extremely simple processing, and the manufacturing cost can be reduced. Also, the strength against shearing force can be improved.

[0011]

As described above, according to the power cylinder mounting structure for the axle of the present invention, the opening of the hydraulic port is used as the positioning projection, and the port escape hole is used as the positioning hole. By simply machining the port relief hole to the extent that it can be positioned, the use of knock pins, pin holes, and reamer bolts, which were required in the past, is no longer necessary, and the positioning of the power cylinder can be accurately performed with a simple structure, resulting in manufacturing costs. Can be reduced.

[Brief description of the drawings]

FIG. 1 is an exploded perspective view showing an embodiment of a power cylinder mounting portion to an axle according to the present invention.

FIG. 2 is an overall plan sectional view of a conventional rear axle.

FIG. 3 is a rear sectional view of the rear axle.

FIG. 4 is an exploded perspective view of a conventional power cylinder mounting portion.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Rear axle main body 2 Mounting member 3 Cylinder bracket 4 Power cylinder 9 Hydraulic port 10 Fixing bolt 11 Bolt hole 21 Positioning protrusion 22 Positioning hole

Claims (1)

(57) [Scope of request for utility model registration] 1. A power cylinder mounting portion for mounting an axle to an axle mounted on a mounting member of an axle body via a fixing bolt, wherein a cylinder bracket having an oil pressure port communicating with an oil chamber and being externally fixed to a power cylinder is formed. At the position where the hydraulic port is formed on the mounting surface of the cylinder bracket, a positioning projection that protrudes toward the mounting member is formed, and a positioning hole that also functions as a port relief hole for fitting the positioning projection to the mounting member is formed. The structure of the power cylinder mounting part to the axle.