JPH09137471A - Vibration-proof member mounting construction - Google Patents

Abstract

PROBLEM TO BE SOLVED: To make it possible to simply mount various kinds of vibration-proof members with different mounting diameter and mounting thickness to a mounting hole bored in a skeleton side. SOLUTION: While a diameter 2D of a mounting hole 2a is made to correspond to the biggest mounting diameter 3(C) among vibration-proof members, the remaining vibration-proof members 3(A) and 3(B) except the biggest mounting diameter form mounting holes 9b corresponding to mounting diameter and mounting thicknesses of the vibration-proof members on the inside circumferences. Mounting seat sections 9c capable of being mounted to mounting holes with the maximum diameter are mounted through auxiliary members 9(A) and 9(B) formed in the circumferences.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention belongs to the technical field of a vibration-proof member used for mounting a cab of a construction machine.

[0002]

2. Description of the Related Art Generally, when mounting a cab for an operator to mount on a body of a construction machine, the cab is mounted in a vibration-proof state in order to improve habitability. In this case, it is necessary to mount the cab under anti-vibration conditions corresponding to the rigidity of the frame on the machine body side, the mounting site, the mounting specifications, the rigidity of the cab itself, the natural frequency, etc. The anti-vibration member is used. As such an anti-vibration member, for example, one using natural rubber,
Those using synthetic rubber, those using a viscous mount, etc. are generally known.

[0003]

By the way, the vibration isolator is to be attached to the attachment hole formed on the body frame side. However, since the attachment diameter varies depending on the vibration isolator, the vibration isolator has conventionally been attached to the fuselage frame side. In addition, the mounting holes with the corresponding mounting diameters were opened according to the specifications. For this reason, not only the work of forming the mounting holes, but also the manufacturing control becomes complicated and complicated, and in order to change the specifications, it is necessary to modify the mounting diameter of the mounting holes. There are problems such as hindering cost reduction, and there is a problem to be solved by the present invention.
Further, the mounting thickness varies depending on the vibration-proof member, and the corresponding problem has the same problem as in the case of the mounting diameter.

[0004]

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances in order to solve these problems. The present invention has a mounting hole formed on the body side,
When selecting from a plurality of anti-vibration members with different attachment diameters and attaching it, the diameter of the attachment hole is made to correspond to the maximum attachment diameter of the anti-vibration members, while Except for the diameters, the remaining vibration-isolating members have mounting holes that correspond to the mounting diameters of these vibration-isolating members on the inner circumference, and have mounting seats that can be mounted in the maximum-diameter mounting holes. It is configured to be attached via an auxiliary member formed on the outer peripheral portion. As a result, even if the mounting diameter of the anti-vibration member is different, only one type of mounting hole needs to be opened in the frame, which facilitates not only the work of forming the mounting hole, but also the manufacturing control of the frame and the anti-vibration function. Even when the specifications of the members are changed, there is an advantage that the work of modifying the mounting holes is unnecessary. Further, by setting the mounting corresponding hole formed in the auxiliary member to a thickness corresponding to the mounting thickness of each vibration isolating member, it is possible to accommodate vibration isolating members having different mounting thicknesses.

[0005]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, embodiments of the present invention will be described with reference to the drawings. In the figure, reference numeral 1 is a cab floor that constitutes a floor surface portion of a cab of a construction machine, and 2 is a frame on the body side of the machine body.
The cab floor 1 is supported via the.

Various types of vibration-damping members 3 are adopted according to the type of cab and the frame 2, and a typical one of them will be described. The first vibration-proof member shown in FIG. The swing member 3 (A) is a fixed bracket 4 provided in contact with the lower side surface portion of the cab floor 1, a receiving bracket 5 provided so as to face the fixed bracket 4,
An anti-vibration rubber 6 made of a natural rubber material interposed between the receiving bracket 5 and the fixed bracket 4, the cab floor 1, the fixed bracket 4, the anti-vibration rubber 6, and the receiving bracket 5 are provided so as to penetrate therethrough. It is configured by using a member such as a bolt 7 and a nut 8 screwed to the bolt 7. The mounting groove portion 6a formed on the outer peripheral surface of the vibration-proof rubber 6 is mounted in the mounting hole 2a formed in the frame 2 via an auxiliary member 9 (A) described later. The mounting diameter of the first anti-vibration member 3 (A) is set to 3D (A) and the mounting thickness is set to 3W (A).

Further, the second anti-vibration member 3 shown in FIG.
(B) has substantially the same structure as the first vibration isolating member 3 (A), but butyl rubber having a high damping effect is used as the vibration isolating rubber 6. This second anti-vibration member 3 (B)
Is an auxiliary member 9 which will be described later in the mounting hole 2a of the frame 2.
Although it is configured to be mounted via (B), the mounting diameter of the second vibration isolating member 3 (B) is set to 3D (B) and the mounting thickness is set to 3W (B).

Further, a third vibration isolating member 3 (C) shown in FIG. 2 (C) is a high viscous liquid-filled type vibration isolating member (viscus mount) having a high damper effect, which is a cab floor. 1, a central shaft 11 bolted to the frame 1, a mounting case 12 fixed to the frame 2, an elastic body 13, a damper case 14, a damping plate 15, a high-viscosity liquid 16 and the like. The diameter is set to 3D (C). Incidentally, since the third vibration isolating member 3 (C) has a structure of being bolted to the frame 2, the mounting thickness is not set. In this embodiment, the first, second, and third vibration-damping members 3 (A), 3 (B), and 3 (C) have the smallest mounting diameter of the first vibration-damping member 3 (A). So that the third anti-vibration member 3 (C) becomes maximum (3D (A) <3D (B) <
3D (C)), and the mounting thickness of the second anti-vibration member 3 (C) is larger than that of the first anti-vibration member 3 (A) (3W (A) <3W (B)). ) It is set.

Further, the diameter 2D of the mounting hole 2a formed in the frame 2 is the largest mounting diameter of the vibration damping members 3 to be mounted, that is, the third vibration damping member 3 (C in this embodiment). ) Is set to correspond to the mounting diameter 3D (C).

On the other hand, the auxiliary members 9 are the remaining vibration-proof members (mainly the vibration-proof members 3 except the one having the maximum attachment diameter (the third vibration-proof member 3 (C) in this embodiment)). In the embodiment, the first and second embodiments 3 (A), 3 (B)) are used for mounting in the mounting hole 2a,
The auxiliary member 9 has an annular portion 9a which is fitted in the mounting hole 2a.
And an attachment corresponding hole 9 formed in the inner peripheral portion of the annular portion 9a.
b, and a mounting seat 9c which is bolted 10 to the outer peripheral edge of the mounting hole 2a, the auxiliary member 9 is
The dimensions are set corresponding to the respective vibration isolating members 3.

That is, the outer diameter of the annular portion 9a of the auxiliary member 9 is set to be slightly smaller than the diameter 2D of the mounting hole 2a so that it can be fitted to the inner peripheral side of the mounting hole 2a as described above. However, the diameter of the mounting compatible hole 9b is
If the size corresponds to the mounting diameter of each antivibration member 3, that is, if it is the auxiliary member 9 (A) for the antivibration member 3 (A), the diameter 9D (A) of the corresponding mounting hole 9b is the antivibration member 3 ( The size is set to correspond to the mounting diameter 3D (A) in A). further,
The thickness of the annular portion 9a is also a dimension corresponding to the mounting thickness of each vibration isolation member 3, that is, the auxiliary member 9 (A) for the vibration isolation member 3 (A).
Then, the thickness 9W (A) of the annular portion 9a is set to a dimension corresponding to the attachment thickness 3W (A) of the vibration isolating member 3 (A).

In the structure as described above, the cab floor 1 is supported by the frame 2 on the body side of the machine body in a vibration-proof state via the vibration-proof member 3. When properly selecting from various vibration isolating members 3 having different heights and attaching it to the attaching hole 2a formed in the frame 2, the diameter 2D of the attaching hole 2a is the largest attaching diameter of the antivibrating member 3. Is dimensioned to correspond to. Then, the vibration isolating member 3 having the maximum attachment diameter
Are attached to the mounting holes 2a as they are, but the rest of the vibration isolating members 3 excluding this are attached via auxiliary members 9 dimensioned to correspond to the mounting diameter and the mounting thickness of each vibration isolating member 3. Will be installed.

As a result, even if the mounting diameter and the mounting thickness of the vibration damping member 3 to be mounted are different, the frame 2
The mounting hole 2a to be opened in one of the vibration damping members 3 may be of one type that is dimensioned so as to correspond to the maximum mounting diameter.
The manufacturing control and the like will be easy. Further, even when the specifications of the vibration isolating member 3 are changed in accordance with the change of the cab after the user's request, the auxiliary member 9 corresponding to the newly selected vibration isolating member 3 is provided. It is possible to deal with it only by mounting it, and there is no need to rework the diameter and thickness of the mounting hole 2a as in the conventional case, so that the number of steps can be reduced and the cost can be reduced.

[Brief description of the drawings]

FIG. 1 is a schematic view showing how a cab floor is attached to a frame.

2A is a sectional view of a first vibration isolating member, FIG. 2B is a sectional view of a second vibration isolating member, and FIG. 2C is a sectional view of a third vibration isolating member.

FIG. 3A is a cross-sectional view of an auxiliary member for the first vibration isolation member,
FIG. 6B is a cross-sectional view of the second vibration isolation member auxiliary member.

FIG. 4A is a sectional view showing a mounting state of a first vibration isolating member, and FIG. 4B is a sectional view showing a mounting state of a second vibration isolating member;
FIG. 6C is a cross-sectional view showing a mounted state of the third vibration isolation member.

[Explanation of symbols]

 2 frame 2a mounting hole 3 anti-vibration member 9 auxiliary member 9b corresponding mounting hole 9c mounting seat

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Akiichi Ono 4-10-1 Yoga, Setagaya-ku, Tokyo Inside New Caterpillar Mitsubishi Corp. (72) Inventor Toshihiko Funabashi 4-1-1, Yoga, Setagaya-ku, Tokyo No. New Caterpillar Mitsubishi Corporation

Claims (2)

[Claims] 1. A mounting hole having a diameter corresponding to the largest mounting diameter of the vibration isolating members when the vibration isolating member having a different mounting diameter is selected from a plurality of vibration isolating members and mounted in the mounting hole formed on the side of the body. On the other hand, the remaining vibration-damping members except the one having the maximum diameter among the vibration-damping members have mounting holes corresponding to the mounting diameters of these respective vibration-damping members formed in the inner peripheral portion, An anti-vibration member mounting structure in which a mounting seat portion that can be mounted in the mounting hole having the maximum diameter is mounted via an auxiliary member formed on an outer peripheral portion. 2. The vibration-isolating member attachment structure according to claim 1, wherein the attachment-corresponding hole portion formed in the auxiliary member is set to a thickness corresponding to the attachment thickness of each vibration-isolating member.