JP2007176401A - Vibration-isolating mount fixing tool - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a vibration-isolating mount fixing tool capable of protecting a vibration-isolating mount with a simple configuration and preventing detachment of a cab from a machine body. <P>SOLUTION: A vibration-isolating mount 10 comprises a mount body 11 having a flange part 11a which extends outwardly from its outer circumference and is abutted on and fixed to a swing frame 3a on its upper end and formed in a container shape while a lower end 11b is closed and an attenuating liquid is filled therein, a shaft part 12 which extends toward the swing frame 3a with an upper portion thereof being fixed to a platform 7a, and is inserted in the mount body 11, and an elastic body 13 which is elastically wound around a circumferential surface of the shaft part 12 and closes an upper end of the mount body 11 to seal the attenuating liquid. A covering member 21 to be fixed to the swing frame 3a to cover the flange part 11a and an elastic member 22 interposed between the covering member 21 and the flange part 11a are provided as a fixing tool 20 of the vibration-isolating mount. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a fixture for an anti-vibration mount disposed in a work machine such as a hydraulic excavator.

Some work machines such as hydraulic excavators are provided with a cab for protecting the living space of an operator and improving the operating environment.
For example, in the case of a hydraulic excavator, the cab is generally attached to a swing frame whose floor plate (hereinafter referred to as a platform) is a frame of an upper swing body (airframe body) via a vibration-proof mount. The anti-vibration mount has a function of reducing the transmission of vibrations generated during work and traveling to the cab, in addition to the function of attaching the cab to the main body. Since the entire cab is supported by the anti-vibration mount, the cab load (vertical downward force) is constantly applied to the anti-vibration mount.

  However, depending on the work posture and work situation, if the aircraft falls or rocks, trees, etc. collide, the impact force causes the pulling force (vertical) to be detached from the swing frame from the swing frame. (Upward force) may be applied. If the tensile force increases beyond a certain allowable value, a crack may occur in the mounting portion between the platform and the swing frame, or the anti-vibration mount may peel from the platform due to progress of the crack.

On the other hand, for example, in Patent Document 1, when a buffer means is interposed between the cab and the swing frame, the displacement of the cab in the direction of detachment from the swing frame exceeds the operating range of the vibration-proof mount. A technique is disclosed in which a buffer means acts to elastically absorb a displacement that exceeds its working range.
Specifically, the buffer bar is configured by screwing and fixing the tension bar, to which the disk-shaped stopper is fixed, to the upper surface of the anti-vibration mount, and attaching the locking plate via the spring to cover the upper surface of the stopper is doing. As a result, when an excessive tensile force is applied to the anti-vibration mount, the stopper and the locking plate are pushed upward together with the spring, but the stopper and the locking plate are pushed back downward by the elastic force of the spring, The displacement is absorbed.
JP 2004-330808 A

However, the technique described in Patent Document 1 is a technique aimed at suppressing deformation of the cab by absorbing energy due to impact load or the like. That is, when a force exceeding the operating range of the vibration isolating mount is applied, the force can be absorbed, but it is difficult to protect the vibration isolating mount itself.
Further, the technique described in Patent Document 1 has a complicated configuration and is difficult to apply to a work machine equipped with a general vibration-proof mount. In other words, in order to apply this technology, a vibration-proof mount having a shape capable of screwing and fixing a tension bar with a stopper to the upper surface must be used. For example, when applying to an existing work machine, the vibration-proof mount Everything needs to be replaced, making it less versatile.

  The present invention has been devised in view of such a problem, and the vibration-proof mount can be protected with a simple configuration and can prevent the cab from being detached from the airframe body. The purpose is to provide a fixture.

  To achieve the above object, the vibration isolating mount fixture of the present invention according to claim 1 is fixed to a swing frame of a work machine and supports a platform forming a lower surface of a cab of the work machine from below. An anti-vibration mount for suppressing vibration of the cab to prevent the anti-vibration mount from being lifted from the swing frame, wherein the anti-vibration mount is extended from the outer periphery of the anti-vibration mount to the swing frame. A mount body formed in a container shape having a collar portion that abuts and is fixed, a lower end is closed and a damping liquid is injected therein, and an upper portion is fixed to the platform toward the swing frame The shaft is inserted into the mount main body, and is elastically wound around a peripheral surface of the shaft, and the mount book A covering member that covers the flange and is fixed to the swing frame, and is sandwiched between the covering member and the flange. An elastic member is provided.

  The anti-vibration mount fixture according to claim 2 of the present invention is the anti-vibration mount fixture according to claim 1, wherein the covering member is a flat plate material, and the flange portion and the elastic member And a boss member interposed between the covering member and the swing frame.

According to the fixture of the anti-vibration mount of the first aspect of the present invention, since the covering member presses the flange portion of the anti-vibration mount through the elastic member, the attachment force of the anti-vibration mount to the swing frame can be increased. it can.
As a result, the force required to lift the cab increases, so that the cab can be prevented from being detached from the swing frame.

Further, the configuration is simple, and it can be easily applied to various existing vibration-proof mounts.
According to the anti-vibration mount fixture of the second aspect of the present invention, a flat plate member without bending can be used as the covering member, and the configuration can be further simplified. Moreover, the strength of the covering member can be ensured, and the collar portion can be more securely pressed by the covering member.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
1 to 4 are views for explaining a vibration isolating mount fixture according to an embodiment of the present invention, and FIG. 1 is a cross-sectional view showing the vibration isolating mount fixture and the periphery of the vibration isolating mount fixture. FIG. 2 is a cross-sectional view of the anti-vibration mount fixture and the periphery of the anti-vibration mount fixture. FIG. 3 is a cross-sectional view taken along a plane different from FIG. FIG. 4 is a perspective view of a hydraulic excavator provided with a fixture for the vibration-proof mount.

  As shown in FIG. 4, a hydraulic excavator 1, which is a typical example of a work machine, includes a lower traveling body 2, an upper swing body 3 that is rotatably coupled to the lower traveling body 2, and an upper swing body 3. It is comprised from the working apparatus 4 provided in the front part. The upper swing body 3 includes a swing frame (swing frame) 3a that serves as a gantry. A counterweight 5 is provided at the rear end of the swing frame 3a. An engine and various cooling devices are disposed in front of the counterweight 5. The engine room 6 is provided in the interior, and a cab 7 on which the operator is boarded is provided in the left front part.

  The cab 7 includes a platform (cab floor) 7a (see FIG. 1) that forms a floor surface, and a cab body that forms side surfaces and a top surface, and is configured in a box shape. As shown in FIG. 1, the cab 7 is elastically supported and attached to the swing frame 3a via a cab mount (anti-vibration mount) 10 mounted between the platform 7a and the swing frame 3a.

  The cab mount 10 is fixed to the swing frame 3a, supports the platform 7a from below, and controls the cab 7. That is, the cab mount 10 has a function of attaching the cab 7 to the airframe body 3 and reduces transmission of vibrations generated in the lower traveling body 2 and the work device 4 to the cab 7 during work and travel (the cab 7 It has a function to control vibration.

  More specifically, as shown in FIGS. 1 and 2, the cab mount 10 is a fluid-filled vibration-proof mount such as a viscous mount, and is extended from the outer periphery to the outer side at the upper end thereof. A mount body 11 formed in the shape of a cylindrical container having a flange portion 11a that abuts and is fixed, a lower end is closed and a damping liquid is injected therein, and an upper portion is fixed to the platform 7a and the swing frame 3a. The shaft portion 12 extends toward the top (that is, in the vertical direction), is inserted into the mount body 11, and is elastically wound around the peripheral surface of the shaft portion 12, and the upper end of the mount body 11. And an elastic body 13 for enclosing the damping liquid.

The collar portion 11a will be described in detail with reference to FIG. 3. The collar portion 11a has a square plate shape when viewed from above, and bolt holes 14 for inserting bolts 30 are formed in the four corners. Has been. The cab mount 10 is attached to the swing frame 3a by the flange 11a with a bolt 30.
Here, as a feature of the present invention, a mount fixture (an anti-vibration mount fixture) 20 is disposed so as to be pressed from above with respect to the cab mount 10.

As shown in FIGS. 1 to 3, the mount fixture 20 is fixed to the swing frame 3 a and covers a collar (cover member) 21 that covers the collar 11 a, and is elastic between the plate 21 and the collar 11 a. The member 22 includes a boss member 23 that is formed at the same height as the thickness d of the flange portion 11a and the elastic member 22 and is interposed between the plate 21 and the swing frame 3a.
The plate 21 is formed in a ring shape, and bolt holes 21a and 21b for inserting a plurality of (here, eight) bolts 30 and 31 at equal intervals in the circumferential direction are opened. In addition, the magnitude | size of the bolt hole 21a is formed larger diameter than the bolt head of the volt | bolt 30, as shown in FIG. The inner diameter of the ring of the plate 21 is set to be approximately equal to the size of the mount body 11. The outer diameter of the ring is set to a size such that the outer peripheral end of the plate 21 is located outside the tip (corner) of the flange portion 11a.

The elastic member 22 is a ring-shaped member made of an elastic body such as rubber, and has an inner diameter that is substantially the same as the inner diameter of the plate 21. And it is arranged below the plate 21.
The boss member 23 is formed in a cylindrical shape, and a bolt groove for attaching the bolt 31 is formed therein. The boss member 23 is disposed between the corners of the flanges 11 a, and the plate 21 is attached to the swing frame 3 a with the bolt 31 via the boss member 23.

The mount fixture 20 according to the embodiment of the present invention is configured as described above, and is assembled by the following process.
First, when the cab mount 10 is mounted on the swing frame 3a, the cab mount 10 is inserted into the mount hole of the swing frame 3a. Subsequently, the bolt 30 is inserted into the bolt hole 14 of the flange portion 11a, and the cab mount 10 is fixed to the swing frame 3a.

Next, the plate 21 is placed on the flange portion 11 a of the cab mount 10 via the elastic member 22, the bolt 31 is inserted into the bolt hole 21 b and the boss member 23 of the plate 21, and the plate 21 is inserted into the cab mount 10. Fixed on top. That is, in this step, the plate 21, the cab mount 10, and the swing frame 3a are fixed.
At this time, since the height of the boss member 23 is set to the thickness d of the flange portion 11a and the elastic member 22, the plate 21 is fixed to the swing frame 3a in a horizontal state. Further, since the plate 21 is placed so that the bolt hole 21a coincides with the bolt head of the bolt 30, and the bolt hole 21a has a larger diameter than the bolt head of the bolt 30, the bolt hole 21a and the bolt 30 interfere with each other. There is no.

The mount fixture 20 of the present invention assembled through the above processes has the following effects.
That is, since the plate 21 presses the flange portion 11a of the cab mount 10 via the elastic member 22, the attachment force of the cab mount 10 to the swing frame 3a can be increased.

  As a result, the force required to lift the cab 7 increases, so that the cab 7 can be prevented from being detached from the swing frame 3a (airframe body 3). That is, the mount fixture 20 acts by the plate 21 so as to increase the strength of the attachment portion of the cab mount 10. As a result, for example, even when an excessive tensile force acts on the cab mount 10, the tensile force does not concentrate on the cab mount 10 attachment site. The tensile force is transmitted and distributed to the swing frame 3a, and local breakage and cracking around the cab mount 10 can be suppressed.

Moreover, since the mount fixture 20 is disposed close to the cab mount 10, it can be installed in a space-saving manner.
In addition, the mount fixture 20 is simple because it is composed of the plate 21 and the elastic member 22 and is attached with the bolts 31. Therefore, the mount fixture 20 can be easily applied to various existing vibration-proof mounts.

Further, since the boss member 23 is interposed between the plate 21 and the swing frame 3a, the plate 21 can be a flat plate material without bending work, and the configuration can be further simplified. Further, the strength of the plate 21 can be ensured, and the flange portion 11a can be pressed down more reliably.
As mentioned above, although embodiment of this invention was described, this invention is not limited to the said embodiment, A various deformation | transformation is possible in the range which does not deviate from the meaning of this invention.

  For example, in the above embodiment, the plate 21 is a flat plate material without bending, and the boss member 23 is arranged. However, as shown in FIG. May be used. According to this, since the plate body 40a in the central portion presses the flange portion 11a through the elastic member 22, and is fixed to the swing frame 3a by the step portion 40b of the plate 40, the boss member 23 becomes unnecessary, and the mount is fixed. The number of parts of the tool 20 can be reduced as compared with the one embodiment, and the attachment process can be simplified.

Moreover, although the case where the mount fixture 20 of this invention was applied to the hydraulic excavator 1 was demonstrated in the said embodiment, you may apply to working machines other than the hydraulic excavator 1. FIG.
The cab mount 10 may be a mount other than a liquid-filled vibration-proof mount such as a viscous mount.

FIG. 5 is a cross-sectional view (an assembly completion view of the cross-sectional view taken along the line AA in FIG. 3) showing the fixture of the vibration-proof mount and the periphery of the fixture of the vibration-proof mount according to the embodiment of the present invention. 1 is a cross-sectional view taken along a plane different from FIG. 1 (a cross-sectional view taken along the line B-B in FIG. 3) showing a vibration isolator mount fixture and a periphery of the anti-vibration mount fixture according to an embodiment of the present invention. Assembly completed drawing). It is a perspective view which decomposes | disassembles and shows the fixture and anti-vibration mount of the anti-vibration mount which concern on one Embodiment of this invention. It is a perspective view showing a hydraulic excavator provided with a fixture of a vibration proof mount concerning one embodiment of the present invention. It is sectional drawing which shows the fixing tool of the vibration isolating mount which concerns on other embodiment of this invention, and the fixing tool periphery of a vibration isolating mount.

Explanation of symbols

1 Hydraulic Excavator 2 Lower Traveling Body 3 Upper Revolving Body 3a Swing Frame (Swivel Frame)
4 Working device 5 Counterweight 6 Engine room 7 Cab 7a Platform (cab floor)
10 Cab mount (anti-vibration mount)
DESCRIPTION OF SYMBOLS 11 Mount main body 11a A collar part 12 Shaft part 13 Elastic body 14 Bolt hole 20 Mount fixing tool (fixing part of vibration-proof mount)
21 Plate (covering member)
21a, 21b Bolt hole 22 Elastic member 23 Boss member 30, 31 Bolt 40 Plate (covering member)
40a Plate body 40b Step part d Thickness of collar part and elastic member, height of boss member

Claims (2)

A fixture for preventing a lift from the swing frame of a vibration-proof mount that is fixed to the swing frame of the work machine and supports the platform that forms the lower surface of the cab of the work machine from below and that controls the cab. Because
The anti-vibration mount has a hook-like shape that extends from the outer periphery to the outer side at the upper end, abuts against and is fixed to the swing frame, and the lower end is closed so that damping liquid is injected into the container. A mounting body formed on the platform, an upper portion thereof being fixed to the platform and extending toward the swing frame, and a shaft portion inserted into the mounting body, and a peripheral surface of the shaft portion being elastic. An elastic body that is wound around and closes the upper end of the mount body and encloses the damping liquid,
A covering member that covers the flange and is fixed to the swing frame;
An anti-vibration mount fixture comprising the covering member and an elastic member sandwiched between the flanges. The covering member is a planar plate material,
The anti-vibration device according to claim 1, further comprising a boss member formed at a height equal to the thickness of the flange portion and the elastic member and interposed between the covering member and the swing frame. Mount fixture.

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