JPH1026172A - Liquid sealing type mount - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent danger by limiting inclination of a cab and securing a living space of a driver by installing a stopper on a mount and regulating inclination of a stud. SOLUTION: An elastic body 22 is vulcanized and adhered between an inner peripheral surface of a cylinder member 27 and an outer peripheral surface of a stud 12 and on an upper surface of an overhung part 29 and a damping plate 33 is fixed on a bottom of the stud 12 by a bolt 34 on a mount provided with a first stopper 30 projected upward from the overhung part 29 on an upper end. Thereafter, a container 28 is calked and fixed on a second stopper 32, viscous liquid 13 is injected from a filler hole 35, and it is plugged by a welded plug 36. Thereafter, when a side wall 25 of a cab on which this mount is installed receives large force and it is inclined, the stud 12 compresses the elastic body 22 and the side wall 25 makes contact with the stopper 30. Furthermore, when the cab is inclined, the damping plate 33 makes contact with the second stopper 32. In this way, it is possible to secure a living space of a driver and to protect the driver by regulating inclination of the side wall 25 by the stoppers 30, 32.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a liquid-filled mount for use in a construction machine using a cab for a fall protection structure.

[0002]

2. Description of the Related Art FIG. 5 is a perspective view of a conventional wheel loader, and FIG. 6 is a sectional view of FIG. In the figure, reference numeral 1 denotes a cab. The cab 1 is a structure to be protected. The cab 1 is mounted on a bracket 4 fixed to a frame 3 of a wheel loader 2 via a liquid-filled mount 5. Reference numeral 6 denotes a protection member.
And is firmly fixed to the frame 3 via the bracket 4, and protects the cab 1 and the liquid-filled mount 5 when the wheel loader 2 falls down. Next, the liquid-filled mount 5 will be described with reference to the plan view of FIG. 7 and its A1-A2 sectional view. In the figure, reference numeral 7 denotes a case. The case 7 includes a cup portion 8 and a mounting plate 11 having mounting holes 9 and fixing claws 10. Reference numeral 12 denotes a stud. The stud 12 is provided with a through hole 14 and a screw hole 15 for injecting the viscous liquid 13 in the axial direction.

[0003] Reference numeral 16 denotes an attenuation plate.
A through hole 17 is provided at the center. One end of the stud 12 is inserted into the through hole 17. 1
Reference numeral 8 denotes a cylindrical case. The cylindrical case 18 includes a cylindrical portion 19 and a mounting plate 21 having a mounting hole 20. Reference numeral 22 denotes an elastic body such as rubber.
Numeral 2 encloses the cylindrical case 18. A recess 23 is formed on the lower surface of the elastic body 22 to complicate the flow of the viscous liquid 13 and improve the buffer capacity.

[0004] Next, the buffer operation of the liquid-filled mount having the above-described configuration will be described. First, when vibration is applied to the frame 3 and the bracket 4 by the operation of the wheel loader 2, the vibration is transmitted to the case 7. Therefore, the case 7 vibrates up and down, and the viscous liquid 13 is stirred. At this time, due to the viscous resistance of the viscous liquid 13 and the damping plate 16, a damping action works, the vibration is attenuated, and the vibration transmitted to the vibration protection unit such as the cab 1 can be reduced.

However, since the wheel loader 2 uses the protection member 6 for protecting the cab 1 and the liquid-filled mount 5, there has been a problem that the cost is high. Therefore, recently, a wheel loader using a cab for a fall protection structure shown in FIG. 8 has been proposed. In the drawing, reference numeral 24 denotes a cab for a fall protection structure. The cab 24 for the fall protection structure increases the strength of the cab 24 by thickening a side wall 25 of the cab 24, and keeps the driver's safety at the time of fall. Was thought to be able to.

[0006]

However, in a conventional wheel loader using a cab for a fall protection structure, the side wall is supported by an elastic body of the liquid-filled mount via a stud of the liquid-filled mount. Therefore, when the side surface of the side wall receives a large force, the stud of the liquid-filled mount compresses and tilts the elastic body. As a result, the side wall of the cab is shown in FIG. 9 and its partially enlarged view in FIG. Lean like so. Thus, there is a problem in that the driver's living space is narrowed due to the inclination of the cab for the conventional fall protection structure, and there is a danger to the driver. Also, at this time,
Since the upper surface of the damping plate is partially in contact with the lower surface of the elastic body, when the side surface of the side wall receives a greater force, the damping plate is pulled in a state where the elastic body on the side that the damping plate contacts is pulled. Since the elastic body is compressed, a shear force is applied to the elastic body, and there is a problem that a crack is generated in the elastic body from a place where the stress is concentrated. Therefore, an object of the present invention is to attach a stopper to the liquid-filled mount to restrict the inclination of the stud. In other words, it is to restrict the inclination of the side wall, to secure a living space for the driver, and not to cause danger to the driver.

[0007]

SUMMARY OF THE INVENTION The present invention is directed to a vertical opening, a radial overhang at the upper end, a first stopper protruding upward at the overhang, and a second stopper at the lower end. , A metal container having an upper opening and an open end integrally fixed to the lower end of the cylindrical member, a highly viscous liquid sealed in the container, and an upper end to be protected. A stud capable of fixing a structure, a metal damping plate fixed to the lower end of the stud and provided in a highly viscous liquid, and a cylindrical member such that the stud is positioned on a central axis of the cylindrical member. And an elastic member fixed between the inner peripheral surface of the stud and the outer peripheral surface of the stud. When the structure to be protected is inclined to a set value, this structure comes into contact with the first stopper. And the outer peripheral surface of the damping plate is Contact, structure to be protected is that to avoid tipping the more values.

[0008]

According to the liquid-filled mount of the present invention, when the side surface of the side wall receives a large force, the side wall comes into contact with the first stopper of the liquid-filled mount, and the damping plate comes into contact with the second stopper. Thereby, the driver's living space can be secured by minimizing the inclination of the side wall of the fall protection cab, so that there is no danger to the driver. Further, since the damping plate contacts the first stopper, no crack is generated in the elastic body.

[0009]

1A and 1B are a plan view and a B1-B2 sectional view showing an embodiment of a liquid-filled mount according to the present invention. In the figure, reference numeral 26 denotes a case. The case 26 is composed of a metal cylindrical member 27 opened in the vertical direction and a metal container 28 opened in the vertical direction and having a bottom. Then, the cylindrical member 27
Is a projecting portion 29 provided at the upper end, and the projecting portion 2
It comprises a first stopper 30 projecting upward from 9, a mounting hole 31 provided in the projecting portion, and a second stopper 32 provided at the lower end. A damping plate 33 is attached to the bottom of the stud 12 via bolts 34. The cylindrical member 27 and the damping plate 33 are
When the side wall 25 is inclined, the load of the cab 24 for the overturn protection structure is received, so that it is necessary to make the plate thicker than the container 28 and have high strength. Other structures are the same as those of the liquid-filled mount shown in FIG. Further, the liquid-filled mount may be used not only in the wheel loader using the cab 24 for the fall protection structure but also in a construction machine using the cab 24 for the fall protection structure.

Next, a description will be given of an assembling method of one embodiment of the liquid-filled mount shown in FIG. First, the cylindrical member 27
The elastic body 22 is vulcanized and bonded between the inner peripheral surface of the cylindrical member 27 and the outer peripheral surface of the stud 12 and the upper surface of the overhang portion 29. And
The damping plate 33 is fixed to the bottom of the stud 12 with a bolt 34. Then, the container 28 is caulked to the second stopper 32 and fixed. Then, the viscous liquid 13 is injected from the injection port 35 of the container 28 and is plugged with the welding plug 36.

FIG. 2 shows the side wall and the liquid-filled mount when the side surface of the side wall of the cab for the overturn protection structure receives a large force and the cab for the overturn protection structure is inclined.
FIG. 3 is an enlarged view of a part of FIG. First, when the cab 24 tilts, the stud 12 compresses the elastic body 22 and the side wall comes into contact with the first stopper 30. Further, when the cab 24 tilts, the damping plate 33 comes into contact with the second stopper 32. As described above, the inclination of the side wall can be regulated by the first stopper 30 in contact with the side wall 25 and the second stopper 32 in contact with the damping plate 33, so that the driver's living space can be secured, and the driver's living space can be secured. Does not hit the side wall 25 and is not injured. Also, the damping plate 3
3 comes into contact with the second stopper 32, so that the elastic body 22
Does not undergo shear deformation in a stretched state, and no crack is generated in this elastic body. In particular, the first stopper 3
Since the 0, the second stopper 32 and the damping plate 33 are directly subjected to the load when the cab 24 for the overturn protection structure is tilted, those having high strength must be used.

FIGS. 4A and 4B are plan views showing another embodiment of the liquid-filled mount according to the present invention, and FIGS.
It is 1-C2 sectional drawing. In the figure, reference numeral 37 denotes a case. The case 37 has a metal tubular member 27 which is opened in the vertical direction and a cylindrical member 2 which is opened in the vertical direction and whose upper end is the cylindrical member 2.
7 and a metal container 39 with a lid 38 caulked at the lower end. Thus, the container 39
Needless to say, it is not always necessary to separate the cylindrical member 27 from the cylindrical member 27. Other configurations are the same as those of the liquid-filled mount shown in FIG.

Next, the assembling method of another embodiment of the liquid-filled mount of the present invention shown in FIG. 4 is the same as that of the liquid-filled mount shown in FIG. Is the same as

[0014]

According to the liquid-filled mount according to the present invention, when the side surface of the side wall receives a large force, the side wall comes into contact with the first stopper of the liquid-filled mount, and the damping plate is in the second position.
By contacting the stopper, the inclination of the side wall of the fall protection cab can be minimized and the driver's living space can be secured, so that there is no danger to the driver.
Further, since the damping plate abuts on the first stopper, there is an effect that a crack does not occur in the elastic body.

[Brief description of the drawings]

FIG. 1 is a plan view of an embodiment of a liquid-filled mount according to the present invention, and a sectional view taken along line B1-B2 of FIG.

2 is a cross-sectional view of the wheel loader when a side surface of a side wall of a cab for a fall protection structure to which the liquid-filled mount of FIG. 1 is attached receives a large force.

FIG. 3 is a partially enlarged view of FIG. 2;

FIG. 4 is a plan view of another embodiment of the liquid-filled mount according to the present invention, and a sectional view taken along line C1-C2 of FIG.

FIG. 5 is a perspective view of a wheel loader.

FIG. 6 is a sectional view of FIG. 5;

FIG. 7 is a side view of a conventional liquid-filled mount and its A1-A2 sectional view.

8 is a sectional view of a wheel loader in which the liquid-filled mount of FIG. 7 is attached to a cab for a fall protection structure.

9 is a cross-sectional view of the wheel loader when the side surface of the side wall of the cab for the overturn protection structure to which the liquid-filled mount of FIG. 7 is attached receives a large force.

FIG. 10 is a partially enlarged view of FIG. 9;

[Explanation of symbols]

 26 case 27 cylinder member 28 container 29 overhanging part 30 first stopper 31 mounting hole 32 second stopper 33 damping plate

Claims (1)

[Claims] A first opening which is open in the vertical direction and has a radially extending portion at an upper end thereof, and a first projecting portion which projects upward from the projecting portion.
A metal tubular member provided with a stopper and a second stopper provided at a lower end, a metal container having an opening at an upper portion and having an open end integrally fixed to a lower end of the cylindrical member, and a metal container sealed in the container. A high-viscosity liquid, a stud on the upper end of which a structure to be protected can be fixed, a metal damping plate fixed to the lower end of the stud and provided in the high-viscosity liquid, and a central shaft of the cylindrical member. An elastic member fixed between the inner peripheral surface of the cylindrical member and the outer peripheral surface of the stud so that the stud is positioned, when the structure to be protected is inclined to a set value, The structure is in contact with the first stopper, and the outer peripheral surface of the damping plate is in contact with the second stopper, so that the structure to be protected is not tilted to a greater value. Formula mount.