JPH037626Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to an elastic support device that restricts the displacement of a supported body and the transmission of vibrations.

[Prior Art] A device for supporting a vibrating supported body on a fixed system, such as an engine support device, elastically supports the engine on a rigid member such as a side member, and prevents the transmission of vibrations from the road surface. It is designed to restrict the transmission of engine vibrations to the body.

As shown in FIG. 1, this type of conventional elastic support device mainly consists of a bush 1 having a predetermined elastic force and a mounting bracket 2 connected to this bush 1, with the bush 1 serving as a fixed system. It is bolted between the side member 3 and the fixed bracket 4, and the mounting bracket 2 is bolted to one end of the engine 5, so that the vibrating engine is elastically supported at three points by other devices (not shown). It's summery.

As shown in FIG. 2, this bush 1 consists of an elastic body vulcanized and bonded to a hollow shaft body 6 through which a mounting bolt is inserted, and a cylindrical body 8 vulcanized and bonded to the outer periphery of the elastic body.
These are fitted into the ring portion 7 of the mounting bracket 2. In order to appropriately elastically support a relatively heavy engine, the bushing 1 is deformed upward in advance by an amount bent by the weight of the engine 5, as shown by the two-dot chain line in the figure. has been done. That is, when the cylinder body 8 is deformed downward (in the direction of gravity) due to the weight of the engine in the installed state, the axial center of the cylinder body 8 is located at the center _C1 between the fixed bracket 4 and the side member 3.

[Problem to be solved by the invention] By the way, in the case of conventional elastic support devices, the elastic support force against vibration and displacement in the horizontal direction was sufficient, but the elastic support force in the vertical direction (vertical direction) was insufficient. There was a risk that the steel ring portion 7 and the like would collide with the side member 3 and the fixed bracket 4 due to large vertical displacement from the road surface. That is, there has been a demand for an increase in the elastic supporting force in the vertical direction (increase in the spring constant).

In order to deal with this, it is conceivable to increase the weight of the bush 1 itself, but as a result, the elastic supporting force in the horizontal direction increases more than necessary.
There was a problem that I didn't like it.

Therefore, as shown in FIG. 3, rubbers 9 are stacked on the upper and lower parts of the bush 1, and these are arranged to face the side members 3 and the fixed bracket 4, respectively, so that when there is a relative displacement in the vertical direction, It is conceivable that displacement may be regulated by pressure contact.

However, since this elastic support device has a shape bent upward as described above, one side of the rubber 9 and the bush 1 must be inserted between the side member 3 and the fixed bracket 4 during installation. However, the center C1 of the outer circumferential portion (cylindrical body ₈ ) and the center _C2 of the hollow shaft body 6 remain offset by an amount 8 equivalent to the deflection displacement of the bush 1, and the relatively hard bush 1 cannot be deformed downward, making installation extremely difficult. That is, since the upper rubber 9 needs to be positioned close to the fixed bracket 4 in the attached state, it is higher than the upper end of the hollow shaft 6 before it is attached, and the height of the hollow shaft 6 is lower than the upper end of the hollow shaft 6. The actual height to the lower end is longer than the distance between the side member 3 and the fixed bracket 4.

To solve this problem, either a slit is formed in the rubber 9 to make it easier to bend, or the fixing bracket 4 is attached to the side member 3 with bolts, and after the support device is placed, the fixing bracket 4 is placed from above. Possibly bolted. However, in the former case, it is easy to insert, but it becomes easy to remove, resulting in a lack of reliability, and in the latter case, the rigidity of the fixing bracket 4 must be increased to form the bolt hole, and the rigidity of the bracket 4 must be increased. Problems such as an increase in plate thickness, an increase in the number of parts, an increase in cost, and a decrease in workability occur.

Therefore, in view of the above circumstances, the present invention aims to provide an elastic support device that can restrict vertical displacement and vibration of relatively heavy supported objects such as engines, is easy to install, and has a simple structure. It was invented.

[Means for Solving the Problems] The present invention includes a cylindrical mounting member that stands upright and is attached to a fixed system, and a cylindrical mounting member that is stacked on the outer periphery of this mounting member and is displaced upwardly as it goes radially outward. An elastic bushing, a bracket fixed to the outer periphery of the elastic bushing and having a locking part bent toward the axis at its lower end, and the bracket is compressed and deformed as appropriate and held between the locking part and the lower part of the elastic bush. and an elastic member.

[Function] With the above configuration, the elastic bushing exerts a predetermined elastic force in the horizontal direction, and when the supported body is attached to the bracket and deforms downward due to its weight, the elastic bushing is able to reduce the gap between the elastic bushing and the locking part. to release the compressive deformation of the elastic member. The elastic member applies vertical elastic force to the elastic bushing to restrict deformation and vibration of the supported body.

[Examples] Examples of the present invention will be described below with reference to the accompanying drawings.

FIG. 4 shows an embodiment of the elastic support device according to the present invention, and shows a case where the elastic support device is applied as a device for supporting an engine.

This elastic support device includes a cylindrical mounting member 10 that stands upright and is attached to a fixed system, and an elastic bushing that is laminated on the outer periphery of the cylindrical mounting member 10 so as to be displaced upwardly as it goes radially outward. 11, a bracket 13 which is fixed to the outer periphery of the elastic bushing 11 and has a locking part 14l bent toward the axis at its lower end, and an appropriate compressive deformation between the locking part 14l and the lower part of the elastic bushing 11. It is mainly composed of an elastic member 15l that is held in place.

The cylindrical mounting member 10 has a length approximately equal to the distance between the side member 3 and the fixed bracket 4, and is designed to maintain this distance and prevent deformation when it is abutted against these and bolted. It's getting old.

The elastic bush 11 is made of an elastic body having a thickness (width in the vertical direction) that is approximately 1/3 of the axial length of the cylindrical mounting member 10, and the axial center side is closer to the cylindrical mounting member 10.
An annular cylindrical member 12 is vulcanized and bonded to the outside thereof. Further, the amount of upward deflection displacement is such that the center _C3 of the cylindrical member 12 and the center _C4 of the cylindrical mounting member 10 are deviated by the amount deformed downward by the load caused by the engine weight. .

The bracket 13 consists of a flat plate part 13a that is bolted to the engine, and a ring part 13b that is integrally connected to one end of the flat plate part 13a. has been done.

In this embodiment, in addition to the locking part 14l formed at the bottom, a similar locking part 14u is also formed at the upper end. That is, the upper and lower ends of the bracket 13 are each bent toward the axis (inward) into a brim shape. These locking parts 14l, 14u
extend vertically so as to be spaced apart by the same distance from the upper and lower ends of the cylindrical member. Therefore, in the original form before installation, the distance between the locking portions 14l, 14u and the upper and lower portions of the elastic bushing 11 is narrower at the bottom and wider at the top.

Further, the upper end of the upper locking portion 14u is set so that it does not protrude above the upper end of the cylindrical mounting member 10, and the height between the locking portions 14l and 14u is
The length in the axial direction is sufficiently smaller than the length in the axial direction. The elastic member 15l is attached to the cylindrical mounting member 10.
It consists of a ring body with a circular cross section along the outer periphery of the elastic bushing 11, and is deformed into an oval shape so as to be crushed between the axial center side of the lower part of the elastic bushing 11 and the tip of the locking part 14l. The degree of this deformation is as shown in Figure 5.
When the locking part 14l (ring part 13b) moves downward relative to the lower part of the bush 11 and the distance between it and the lower part of the bush 11 increases, it returns to its original shape (circular cross section) and its upper and lower ends are connected to the lower part of the bush 11 and the locking part 14l. It is formed in such a way that it comes into moderate contact with the

Further, in this embodiment, a similar elastic member 15 is also provided between the upper part of the elastic bush 11 and the locking part 14u.
u is provided, and when the distance between the locking portion 14u and the upper part of the bush 11 narrows due to the downward movement of the locking portion 14u,
The upper and lower ends are adapted to appropriately contact the upper part of the bush 11 and the locking part 14u.

Next, the operation of this embodiment will be explained.

When manufacturing and assembling this elastic support device, first, the cylindrical mounting member 10 and the cylindrical member 12 are vulcanized and bonded to the inner and outer surfaces of the elastic bush 11, respectively. On the other hand, for the bracket 13, first, only the locking portion 14l on the lower side of the ring portion 13b is molded, and this is locked with the elastic member 15l. Next, the elastic bush 11 and the ring portion 13b of the bracket 13 are press-fitted. This press-fitting operation brings the elastic member 15l into a compressed state. Next, the elastic member 15u is attached to the elastic bush 11 and the cylindrical attachment member 10 from above, and finally the locking portion 14u on the upper side of the ring portion 13b is bent and molded to complete the manufacturing.

Then, this elastic support device is inserted between the side member 3, which is a fixed system, and the fixed bracket 4, and the bolt 16 is inserted into the cylindrical mounting member 10 and fastened.

Thereafter, when the engine is attached to the bracket 13, the function of this elastic support device is demonstrated. That is, when a downward load is applied due to the weight of the engine, the bracket 13 moves relatively downward, and the elastic bushing 11 deforms accordingly, causing the center C ₃ of the cylindrical member 12 and the center C 3 of the cylindrical mounting member 10 to _Four
will be in a state where they match. At this time, the lower elastic member 15l is released from the compressed state and is stopped between the elastic bush 11 and the locking portion 14l to generate a predetermined elastic force. Also, the upper elastic member 15u
The locking portion 14u, which moves relatively downward, changes from a free state to a locked state between the elastic bushing 11 and generates an elastic force in the vertical direction.

With this, the elastic bushing 11 exerts a predetermined buffering function in the horizontal direction, and the elastic members 15u and 15l disposed above and below the bushing 11 are able to absorb vertical displacement and
Regulate vibration. At this time, the elastic members 15u, 15
l is spaced apart from the cylindrical member 12 in the radial direction and is separate from the elastic bushing 11, so horizontal vibrations and displacements can be prevented by clearance or the elastic bushing 1.
1 and can be allowed to some extent. Further, a resin plate or the like may be interposed between the bush 11 and the bush 11 to make it easier to slide. Therefore,
The elastic support force in the vertical direction can be reinforced without adversely affecting the original elastic support force in the horizontal direction.

In addition, the present invention restricts upward displacement (vibration) using the elastic member 15l that has been compressed and deformed in advance, so that the original elastic force can be obtained when supporting the engine, and even in the state before installation. The upper side of the elastic bushing 11 does not protrude beyond the cylindrical mounting member 10, resulting in extremely good mounting performance. In other words, there is no reduction in installation ease or reliability.
There is no need to change the fixed bracket 4, increase the number of parts, or increase costs.

In this embodiment, an elastic member 15u for regulating downward displacement is provided on the upper locking part 14u, but as shown in FIG. It is also possible to fix the rubber in the same shape as a conventional rubber and press it appropriately to the side member 3 when the engine is installed. The operation and effect of this modified embodiment are similar to those of the previous embodiment.

[Effects of the Invention] In summary, the present invention provides the following excellent effects.

An elastic bushing laminated with appropriate displacement on the outer periphery of the cylindrical mounting member, a bracket fixed to the outer periphery and having a locking part, and an elasticity compressed and deformed as appropriate and held between the locking part and the elastic bushing. With a simple configuration, elastic force in both the horizontal and vertical directions can be obtained without compromising installation performance, and when a heavy supported object is supported, appropriate deformation and vibration can be achieved. Regulation is achieved.

[Brief explanation of drawings]

Fig. 1 is a perspective view showing an outline of an engine support device which is a conventional elastic support device, Fig. 2 is a side sectional view showing details of its main parts, and Fig. 3 is a conventional technology to be compared with the present invention. FIG. 4 is a side sectional view showing one embodiment of the elastic support device according to the present invention, FIG. 5 is a side sectional view for explaining its operation, and FIG. FIG. 2 is a side sectional view showing a modified embodiment of the present invention. In the figure, 10 is a cylindrical mounting member, 11 is an elastic bush, 13 is a bracket, 14l is a locking part, and 15l is
is an elastic member.

Claims (1)

[Scope of utility model registration request] a cylindrical mounting member that stands upright and is attached to the fixing system; an elastic bushing that is stacked on the outer periphery of the mounting member and is displaced upwardly as it goes radially outward; The bracket is characterized by comprising a bracket having a locking portion bent toward the axis at the lower end, and an elastic member which is appropriately compressed and held between the locking portion and the lower part of the elastic bushing. Elastic support device.