JP2000336697A - Vibro-isolating support mechanism for construction machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent an elastic body from being deformed exceeding its tolerance whichever direction a mounted equipment swings. SOLUTION: This vibro-isolating support mechanism for supporting a mounted equipment in a vibro-isolating manner to a construction machine body 10 is provided with an elastic body 21 interposed between the construction machine body 10 and the equipment 1 mounted on the body 10, and a stopper member 26 abutting on a receiving part 22a on the construction machine body side to requlate the elastic deformation of the elastic body 21. The shape of the stopper member 26 is so determined that the stopper member 26 abuts on the receiving part 22a within a specified swing angle of the mounted equipment whichever direction it swings in the case of the mounted equipment swinging with respect to the construction machine body 10.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an anti-vibration support mechanism used for supporting a mounted device such as a cab on a construction machine body.

[0002]

2. Description of the Related Art FIG. 6 shows a support structure for supporting a cab 1 on a construction machine. A cab bed 10 provided on an upper revolving unit is provided with a plurality of vibration proof support mechanisms 20 for the cab 1.
Is supported. As a conventional anti-vibration support mechanism, for example, the one disclosed in Japanese Patent Laid-Open No. 5-125745 and the one shown in FIGS. 7 and 8 are known. The anti-vibration support mechanism 20 shown in FIGS. 7 and 8 has a rubber portion 21 fixed to the floor plate 1a of the cab 1 and a liquid filled with liquid such as silicon oil and fixed to the cab bed 10 via the flange 22a. The cab 1 is provided on the construction machine main body by utilizing the elastic deformation of the rubber portion 21 and the damping action of the silicone oil in the same manner as disclosed in the above publication. The stopper portion 23 integral with the rubber portion 21 has a pair of left and right protrusion portions 23a that protrude in the X direction in FIG. 7, and restricts deformation of the rubber portion 21 when the protrusion portions 23a abut on the flange 22a. Prevent its breakage. For example, when a construction machine gets over an obstacle such as a stone, an excessive load is applied, so that the stopper portion 23 often comes into contact with the flange 22a.

[0003]

In the conventional structure described above, the overhanging portion 23a of the stopper 23 is provided only in the X direction. Therefore, when the operator's cab 1 swings with respect to the construction machine main body due to a complicated load, any one of the projecting portions 23a comes into contact with the flange 22a and swings in the X-axis direction and the rubber portion 21 However, the stopper portion 23a does not function when swinging in the Y direction, and the deformation of the rubber portion 21 exceeds the allowable amount, and the rubber portion 21 may be damaged.

An object of the present invention is to provide an anti-vibration support mechanism for a construction machine capable of preventing deformation of an elastic body beyond an allowable amount even when a mounted device swings in any direction.

[0005]

FIG. 1 shows an embodiment of the present invention.
The present invention relates to a construction machine body 10
And an elastic body 21 interposed between the apparatus 1 mounted on the main body 10 and an elastic body 21 integrated with the mounted apparatus 1 and elastically deforming the elastic body 21 by contacting a receiving portion 22a on the construction machine main body side. And a stopper member 26 for regulating the
Is applied to an anti-vibration support mechanism that supports the anti-vibration on the construction machine body 10. When the mounted device 1 swings with respect to the construction machine main body 10, the stopper member 26 contacts the receiving portion 22 a such that the swing angle is within a predetermined angle regardless of the direction of the swing. Is determined, thereby solving the above problem. According to the second aspect of the present invention, the clamped portion 26A clamped between the elastic body 21 and the mounting device 1 and the support portion 22a project in all directions 360 degrees around the center axis of the clamped portion 26A. The stopper member 26 is formed by integrating the contactable contact portion 26B. According to the third aspect of the present invention, the contact portion 26B forms a concave portion having the held portion 26A as a bottom portion, and a part of the elastic body 21 is inserted into the concave portion. According to a fourth aspect of the present invention, the elastic body 21 has a covering portion 21a that covers a part of the receiving portion 22a, and the stopper member 26 comes into contact with the covering portion 21a.

[0006] In the section of the means for solving the above-mentioned problems, which explains the configuration of the present invention, the drawings of the embodiments are used to make the present invention easier to understand. However, the present invention is not limited to this.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described with reference to the drawings. FIG. 1 shows an anti-vibration support mechanism according to an embodiment of the present invention, and the same components as those in FIGS. 7 and 8 are denoted by the same reference numerals. An anti-vibration support mechanism 20 ′ includes an enclosure 22 in which a liquid such as silicon oil is enclosed, and a shaft member 2.
A rubber portion 21 fixed to the peripheral surface of the shaft 4 and having a lower portion inserted into the enclosure 22;
5 and a stopper 26 provided above the rubber portion 21. The enclosure 22 is screwed to the cab bed 10 by a bolt 31 via a flange 22a provided on the upper part of the enclosure. A stud bolt 27 is provided above the shaft member 24.
The stud bolt 27 penetrates a bolt through hole 26 a formed in the stopper 26. The shaft member 24 and the rubber portion 21 are fixed to the cab 1 by passing the stud bolt 27 through the floor plate 1a of the cab 1 and screwing the nut 32 to the tip.

The stopper 26 is provided with the bolt through hole 26a.
And a protruding portion 26A which is sandwiched and fixed between the rubber portion 21 and the floor plate 1a, and which protrudes from the supported portion 26A so as to diverge and has a tip extending in a substantially horizontal direction.
And B are integrated. As can be seen from FIG. 2, the projecting portion 26B projects 360 degrees in all directions around the bolt through hole 26a, that is, the center axis of the pinched portion 26A, and the lower surface of the horizontal portion can contact the flange 22a of the enclosure 22. It is said. Here, the rubber portion 21 has a covering portion 21a that thinly covers the upper surface of the flange 22a, and the overhang portion 26B
Actually comes into contact with the covering portion 21a.

The cab 1 (FIG. 6) is supported on the cab bed 10 by a plurality of vibration isolating support mechanisms 20 'constructed as described above. The vibration of the construction machine body is
Is transmitted to each of the anti-vibration support mechanisms 20 ′ through the
Acts on the damping plate 25 in the silicone oil,
The transmission of vibration to the cab 1 is reduced by the damping effect.
Also, if the rubber portion 21 is greatly deformed due to an excessive load,
The lower surface of the overhang portion 26B of the stopper 26 is
The deformation of the rubber portion 21 is restricted by contacting the flange 22a. At this time, the overhang portion 26B does not actually come into direct contact with the flange 22a, but comes into contact with the covering portion 21a of the rubber portion 21 covered on the flange 22a. Therefore, even if the flange 22a is made of metal, it is very large. No collision sound is generated. In addition, the covering part 21a
, The overhang portion 26B may be configured to directly contact the flange 22a.

When the construction machine rides on an obstacle such as a stone, for example, complicated vibration is applied to the cab 1 and the cab 1 may swing with respect to the construction machine body. At this time, the stopper 26 of the anti-vibration support mechanism 20 'is inclined with respect to the cab bed 10, but as described above, the projecting portion 26B of the stopper 26 projects in all directions 360 degrees around the bolt through hole 26a, that is, the mounting portion. Therefore, no matter which direction the operator's cab swings, the lower surface of the overhang portion 26B abuts on the flange 22a within a predetermined swing angle, and further deformation of the rubber portion 21 is prevented. Therefore, even if any vibration is applied to the construction machine main body, it is possible to prevent the rubber portion 21 from being damaged by an excessive load.

In the above embodiment, the cab 1 constitutes the mounted equipment, the rubber part 21 constitutes the elastic body, the flange 22a constitutes the receiving part, and the overhang part 26B constitutes the contact part.
The configuration of the stopper is not limited to the above-described one, and for example, an arm-shaped stopper 126 as shown in FIG. 3 may be used. Further, the example in which the contact portion of the stopper projects in all directions from the center of the stopper in 360 degrees has been described. However, as shown in FIGS. 4 and 5, for example, a plurality of contact portions 226B, 226C (two in the X and Y directions in the figure) may be provided, and a gap may be formed between the contact portions. In this case, even if the operator's cab 1 swings in any direction, one of the contact portions 226B and 226C is set within a predetermined swing angle.
One or two abut against the flange 22a, and further deformation of the rubber portion 21 is prevented. However, the contact portion 226
When the corners EG of B and 226C abut against the flange 22a, a biased force acts on the abutting portions 226B and 226C, and the covering portion 21a of the rubber portion 21 is easily damaged. It is advantageous to provide overhangs that overhang in all directions.

In the above description, a vibration isolating support structure using a container filled with silicone oil has been described. However, any structure having an elastic body such as rubber and a stopper can be used. Furthermore, the equipment mounted on the construction machine main body is not limited to the cabin, but may be any other equipment that needs to be supported via the vibration isolation support mechanism.

[0013]

According to the present invention, when the on-board equipment such as the driver's cab swings with respect to the construction machine body, the stopper member is provided with a swing angle within a predetermined angle regardless of the swing direction. Since the abutting portion is brought into contact with the receiving portion, the deformation of the elastic body as the vibration isolating support member does not exceed an allowable amount, and the damage can be suppressed.

[Brief description of the drawings]

FIG. 1 is a half sectional view showing an anti-vibration support mechanism according to an embodiment of the present invention.

FIG. 2 is a plan view of a stopper.

FIG. 3 is a sectional view showing another stopper.

FIG. 4 is a plan view showing an anti-vibration support mechanism according to another embodiment.

FIG. 5 is a front view of the anti-vibration support mechanism of FIG. 4;

FIG. 6 is a side view showing a driver's cab support structure using an anti-vibration support mechanism.

FIG. 7 is a plan view showing a conventional anti-vibration support mechanism.

FIG. 8 is a front view of the anti-vibration support mechanism of FIG. 7;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Operator's cab 1a Floor plate 10 Cab bed 20 Anti-vibration support mechanism 21 Rubber part 21a Covering part 22 Liquid enclosure 22a Flange 24 Shaft member 25 Damping plate 26, 126, 226 Stopper 26A, 226A Clamping part 26B Overhang part 27 Stud bolt 31 bolt 32 nut 226B, 228C Contact part

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Akira Takahashi 650, Kandamachi, Tsuchiura-shi, Ibaraki Hitachi Construction Machinery Co., Ltd. Tsuchiura Plant (72) Inventor Yasushi Konomura 650, Kandamachi, Tsuchiura-shi, Ibaraki Hitachi Construction Machinery Inside the Tsuchiura Plant, Ltd. (72) Inventor Koji Tahara 650, Kandamachi, Tsuchiura-shi, Ibaraki Prefecture F-term in the Tsuchiura Plant, Hitachi Construction Machinery Co., Ltd. 2D015 EC02

Claims (4)

[Claims] An elastic body interposed between a construction machine main body and a device mounted on the main body, and an elastic body integrated with the mounted device and abutting on a receiving portion on the construction machine main body side to contact the elastic body. A stopper member for regulating elastic deformation of the elastic body,
In the vibration isolating support mechanism for supporting the mounting equipment on the construction machine main body, when the mounting equipment swings with respect to the construction machine main body, the swing angle is predetermined in any direction. The anti-vibration support mechanism for a construction machine, wherein the shape of the stopper member is determined so that the stopper member contacts the receiving portion within an angle. 2. The stopper member includes a clamped portion clamped between the elastic body and the mounting device, and the stopper portion extends in all directions 360 degrees around a center axis of the clamped portion. The vibration isolating support mechanism for a construction machine according to claim 1, wherein a contact portion capable of contacting the construction machine is integrally formed. 3. The abutting portion is formed with a concave portion having the held portion as a bottom, and a part of the elastic body is inserted into the concave portion. 4. The vibration isolating support mechanism for a construction machine according to 4. 4. The elastic body according to claim 1, wherein the elastic body has a covering portion that covers a part of the receiving portion, and the stopper member is configured to contact the covering portion. A vibration isolating support mechanism for a construction machine according to any one of the above.