JPS636514Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to an improvement of a vibration isolation stay used for a vibrating internal combustion engine or an elevated structure.

In order to prevent the structure from vibrating, the vibrating structure may be coupled to a rigid body via a stay.

Figure 1 shows an example of such a vibration isolation stay.
When the vibrating structure 2A (hereinafter referred to as the device) installed on the surface plate 1A vibrates in the direction of the arrow, the upper plate 4A fixed to the device 2A and the rigid body 3A installed on the surface plate 1A, 5A and the stay 6A are connected via a welded portion 7A. It should be noted that the welded portion 7A is shown as a commonly used fillet weld.

In addition, another example of FIG.
B, upper plates 4B, 5B and stay 6B fixed to rigid body 3B installed on surface plate 1B,
The stay 6B is fastened via a bolt 8B inserted into a bolt hole 7B, a washer 9B, and a nut 10B. Note that in order to prevent vibration of the device 2B, a large number of bolts 8B, washers 9B, and nuts 10B are required, although not shown.

FIG. 3 shows yet another example, in which when a device 2C installed on a surface plate 1C vibrates in the direction of the arrow, steel plates attached to the device 2C and a rigid body 3C installed on the surface plate 1C, respectively. 4C and the steel plate 5C are held together by a mating plate 6C, and a bolt 8C is inserted between the bolt hole 7C drilled in the mating plate 6C and the bolt hole 7C' bored in each of the steel plates 4C and 5C. The steel plates 4C, 5C and the mating plates 6C, 6C are integrally tightened by a washer 9C and a nut 10C. Note that a clearance S is provided between the inner circumferential surface of the bolt hole 7C and the shaft of the bolt 8C.

In the stay shown in FIG. 1, the device 2A and the rigid body 3
Each upper plate 4A, 5A and stay 6A fixed to A
Since the upper plates 4A and 5 are fillet welded, it is necessary to scrape off each welded part 7A during disassembly.
If a vibration load greater than the allowable load is applied to the welded portion 7A between the stay 6A and the welded portion 7A, there is a risk that the welded portion 7A will be damaged.

In addition, in the stay shown in Figure 2, equipment 2
To prevent vibration of B, a large number of bolts 8B,
Washer 9B and nut 10B are required. Therefore, since a large number of bolt holes are formed in the upper plates 4B, 5B and the stay 6B, there is a risk that the strength of the device 2B and the rigid body 3B will be reduced. Furthermore, since a large number of bolts 8B are used, much time is required for assembly and disassembly.

Furthermore, in the stay shown in FIG.
Workability is easier compared to the stays shown in Figures and 2, but since there is a clearance S between the bolt 8C and the bolt holes 7'C, 7C of the steel plates 4C, 5C and the mating plate 6C, Sliding displacement occurs in this portion, and the spring constant of the entire stay including the stay itself and its fastening portion decreases, resulting in a problem that the vibration prevention effect is reduced.

This proposal was proposed in order to eliminate these drawbacks.In the vibration isolation stay that connects equipment and a rigid body, the plate fixed to the equipment and the plate fixed to the rigid body are The faces of the plates are positioned on the same plane and are arranged oppositely, and the pair of opposing plates are integrally connected through a pin member that is tightly fitted between the pair of front and back mating plates that clamp the two plates. This relates to a vibration-proof stay characterized by being connected to a vibration-proof stay.

In the anti-vibration stay according to the present invention, a plate fixed to a device and a plate fixed to a rigid body are placed opposite each other with their thickness center planes located on the same plane, and the two plates are sandwiched between the front and back sides. When connecting via a pair of mating plates, the pin member is tightly fitted over each of the plates and the pair of mating plates to be integrally connected. The clearance between each plate and the pin through hole in the mating plate is completely zero, and there is no sliding deformation between them.
A large spring constant can be obtained, and an excellent vibration prevention effect can be obtained, and since the clearance is removed, there is no play in the fastened part by the pin member, and highly accurate positioning is performed. Furthermore, compared to the case where welding or bolts are used, the present invention has many advantages, such as the ease of attaching and releasing the stay.

The present invention will be described below with reference to illustrated embodiments.

A device 12 installed on a surface plate 11 that vibrates in the direction of arrow P, and a rigid body 13 adjacent to the device 12 are provided with steel plates 14 and 15 with their thickness center planes located on the same plane, that is, on the same plane. Each cross-sectional longitudinal center axis of each steel plate 14, 15 is located on a straight line XX,
In addition, they are fixed so that an appropriate distance C exists between the opposing ends.

A pair of mating plates 16, 17 having the same shape are clamped on both the front and back surfaces of the opposing pair of steel plates 14, 15.

Each of the steel plates 14 and 15 has a tapered pin hole 1.
4a, 15a are perforated, and each of the laminated plates 16, 1
Taper pin holes 16a, 17a, 1 are provided at positions corresponding to taper pin holes 14a, 15a in 7, respectively.
6a' and 17a' are drilled.

Taper pins 18, 18' are formed across the taper pin holes 14a, 16a, 17a and 15a, 16a', 17a' so that the taper angle of the shaft portion thereof is the same as the taper angle of each of the taper pin holes.
are press-fitted, and the washers 19 and 19' are fitted to the end threads of each taper pin, and the nuts 20 and 2 are
0', the steel plates 14, 15 and the mating plates 16, 17 are firmly fastened together.

In the above embodiment, two laminated plates 16,
17 is used, however, the number of combined plates is not limited to two, and a plurality of plates may be used. Preferably, steel plates 1
It is preferable that they be arranged symmetrically on both the front and back sides of numbers 4 and 15.

When a vibration load P in the direction of the arrow is applied to the device 12, the load from the device 12 is transmitted to the steel plate 14, and most of the vibration load P is applied to the taper pin 18.
from the mating plates 16, 17 to the steel plate 1 via the taper pin 18'.
5.

As mentioned above, since the taper angle of each taper pin hole is the same as the taper angle of the shaft of the taper pins 18, 18',
8' through the nuts 20, 20' to the steel plate 14,
15 and the mating plates 16 and 17 are firmly tightened,
The clearance between each of the taper pin holes and the taper pins 18, 18' becomes completely zero.

Therefore, since there is no sliding deformation in the fastened portion by the taper pins 18, 18', a stay with a high spring constant can be obtained, and since no looseness occurs in the fastened portion, highly accurate positioning can be achieved.

Furthermore, since welding or the like is not used to fix the stay, the stay can be easily attached and detached, and there is no risk of reduction in fatigue strength due to welding.

In the above embodiment, a taper pin is used as a fastening pin member for the steel plate and the laminated plate, but a parallel pin is used instead of the taper pin, and the parallel pin is press-fitted and tightly fitted into the steel plate and the laminated plate. You can do it like this.

[Brief explanation of drawings]

FIGS. 1 and 2 are longitudinal sectional front views showing an example of a conventional vibration isolating stay, FIG. 3 is a cross-sectional plan view showing yet another example of a conventional vibration isolating stay, and FIG. 4 is a vibration preventing stay according to the present invention. Front view showing one embodiment of the swing stay, 5th
The figure is a view taken along the arrow V-V in FIG. 4. 12...equipment, 13...rigid body, 14,15...
Steel plate, 16, 17... Laminated plate, 18, 18'...
Taper pin.

Claims (1)

[Scope of utility model registration request] In a vibration isolation stay that connects a device and a rigid body, a plate fixed to the device and a plate fixed to the rigid body are arranged oppositely with their thickness center planes located on the same plane. A vibration isolating stay characterized in that a pair of plates are integrally connected via a pin member tightly fitted between a pair of front and back mating plates that clamp the same two plates.