JPS6235125A - Elastic supporting structure - Google Patents

Abstract

PURPOSE:To prevent the idle turning of a nut by constituting integrally a cylindrical body being inserted into the through hole of an elastic rubber, a washer being contacted with the bottom of the elastic rubber, and a nut for fastening use so as to utilize the friction force between the elastic rubber and the cylindrical body pat and/or the washer. CONSTITUTION:A seating member 5 is integrally composed of a cylindrical part 3 being inserted into the central through hole 13 of an elastic rubber part 1, a washer part 2 being contacted with the bottom of the elastic rubber part 1, and a nut 4 for fastening use. Accordingly, when the seating member is fitted to a fitting member by a bolt 6, a frictional resistance is caused between the elastic rubber part 1 and the cylindrical part 3 and/or the washer part 2, and therefore the idle turning of a nut 4 is prevented to enable the fitting work to be easily carried out.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to elastic support structures. The present invention, for example,
It can be used to elastically support the herad guard of industrial vehicles such as forklifts, power shovels, and bulldozers to the vehicle body frame.

[Prior Art] Conventionally, for example, in industrial vehicles, elastic support structures have been used for the purpose of fixing head guards and the like to a vehicle body frame.

As shown in FIG. 5, this elastic support structure includes an elastic rubber member 100 composed of a head 101 having a central through hole 100a and a shaft portion 102, a large diameter washer 200,
It consists of a cylindrical body 300, a nut 400, and a bolt 500 that is screwed into the nut 400.

When assembling, the shaft portion 102 of the elastic rubber member 100 is inserted into the seating hole 601 of the second mounting member 600. In this state, the central through hole 100a of the elastic rubber member 100
The cylindrical body 300 is inserted into the tube, and the first mounting member 700 is placed on the head 101 of the elastic rubber member 100. In this state, insert the bolt 500 from the first mounting member 700 side into the bolt insertion hole 701 of the first mounting member 700, the cylindrical body 3oO, and the washer 200, and then insert the bolt 500 into the nut 400.
Screw the ends of 0 together. In this state, the lower end of the shaft portion 102 of the elastic rubber member 100 is pressed by the washer 200, so as shown in FIG.
0 and the second attachment portion 600 protrudes outward in a flange shape to form a flange portion 102a. Therefore, the flange 102a and the head 10
1 provides good elastic support.

[Problems to be Solved by the Invention] In the above-described elastic support structure, when screwing the POL 500 and the nut 400 together, the nut 400 is held in place by hand, spanner, etc. from the beginning of the screwing until the screwing is completed. Fix it with nut 4
It was necessary to prevent the 00 from idling, and it was a hassle to move in.

Further, when pressing with the washer t200 to form the flange 102a, the rubber of the elastic rubber member 100 pressed by the washer 200 forms the boundary part X between the washer t-200 and the cylindrical body 300 (see FIG. ), and as a result,
This may cause the rubber to break, or the flange portion 102a may not be able to contract to a predetermined thickness, resulting in the second problem of elastic support.

The present invention was made in view of the above-mentioned circumstances, and its purpose is to provide an elastic material that suppresses idle rotation of the putty, makes it easy to assemble, and does not cause problems such as rubber breakage or poor wall thickness at the flange. To provide a support structure.

[Means for Solving the Problems] The elastic support structure according to the present invention is used between a first mounting member having a bolt insertion hole and a plate-shaped second mounting member having a seating hole, and has the following features: an elastic rubber member comprising a head portion having a through hole and a shaft portion, the shaft portion being inserted and locked into the seating hole and seated, and a lower end portion of the shaft portion protruding below the seating hole; a washer portion whose one surface is applied to the lower end surface of the shaft portion of the elastic rubber member, and a cylindrical body that is integrally formed coaxially with one surface of the washer portion and is inserted into the central through hole of the elastic rubber member. and a nut portion coaxially and integrally formed on the other surface of the washer portion, the bolt insertion hole of the first mounting member, the cylindrical body portion of the seating member, and the backing member. and a bolt member that passes through the nut part and is screwed into the female thread part of the nut part, and by screwing the bolt member and the nut part together and moving the washer part upward,
The shaft portion of the elastic rubber member is press-deformed so that the inner peripheral portion of the shaft portion is brought into close contact with the cylindrical body portion, and this close contact prevents the nut portion from rotating.

A feature of the elastic support structure according to the present invention is that a seating member is provided in which a washer, a cylinder, and a nut, which were conventionally separated, are integrated. In order to integrate them, methods such as cutting them integrally from a single block, welding the washer part, cylindrical body part, and nut part together by welding, e.g., ultrasonic welding, or fixing them together with adhesive, etc. are used. You can take it.

In addition, a J3 threaded portion is formed on the outer periphery of the cylindrical body, and
A female threaded portion may be formed in the central through hole of the elastic rubber member, and the male threaded portion of the cylindrical body portion and the female threaded portion of the elastic rubber member may be screwed together.

Next, a typical method for assembling the elastic support structure according to the present invention will be explained.

First, the shaft portion of the elastic rubber member is inserted into the seating hole of the second mounting member. In this state, the cylindrical body portion of the seating member is inserted into the central through hole of the elastic rubber member.

Next, the first mounting member is placed on the head of the elastic rubber member in the same manner as in the prior art. Then, a bolt member is passed through the bolt insertion hole of the first mounting member, the bolt member is further passed through the cylindrical body part and the washer part of the seating member, and is screwed into the nut part integral with the face piece part and the washer part.

In this manner, when the bolt member and the nut portion of the seating member are screwed together, the amount of twisting of the nut portion of the seating member is less than that in the past, or there is almost no twisting.

The main reasons are as follows. That is, when the bolt member and the nut part are screwed together, the nut part is left free to rotate as in the conventional case. However, in the present invention, when the nut part and the bolt member are screwed together, the washer part moves upward. As a result, the shaft portion of the elastic rubber member is pressed and tends to deform outward and inward. In order to prevent inward deformation in this manner, the inner circumferential portion of the shaft portion tightly adheres to the outer circumferential portion of the cylindrical body portion.

Due to this close contact, the cylindrical body cannot rotate within the central through hole of the elastic rubber member. Therefore, the nut part integrally formed with the cylindrical body part cannot be rotated either.

As a result, idle rotation of the knot portion can be prevented.

Further, even when the shaft portion of the elastic rubber member is press-deformed into a brim shape as in the conventional case, the rubber does not enter the boundary portion between the washer portion and the cylindrical body portion. This is because the washer portion and the cylindrical body portion are integrally constructed.

[Effects of the Invention] As explained above, in the elastic support structure according to the present invention,
Idle rotation of the nut can be prevented. Therefore, the work of assembling the elastic support structure is easier than in the past.

The elastic support structure according to the present invention uses a seating member in which a cylindrical body part, a nut part, and a washer part are integrated.

Therefore, it is possible to reliably prevent the rubber of the elastic rubber member from entering one boundary portion between the cylindrical body portion and the nut portion. Therefore, problems such as rubber breakage can be prevented.

[Example] A first example of the elastic support structure according to the present invention is shown in FIGS. 1 to 3.

(Structure) As shown in FIG. 3, the elastic support structure according to this embodiment includes a first mounting member 700 having a bolt insertion hole 701;
It is used between a plate-shaped second mounting member 600 having a seating hole 601. Here, the first attachment member 700 is a member that holds a head guard or the like. Moreover, the second mounting member 60
0 is the body frame of an industrial vehicle.

The elastic support structure according to this embodiment includes an elastic rubber member 1,
It is composed of a seating member 5 and a bolt 6 as a bolt member.

Here, as shown in FIG. 2, the elastic rubber member 1 has a head 11 having an outer diameter larger than the inner diameter of the seating hole 601 of the second mounting member 600, and a head 11 having an outer diameter that is approximately the same as the inner diameter of the seating hole 601. The shaft portion 12 has an outer diameter, and has a central through hole 13 that extends downwardly.

The elastic rubber member 1 is made of natural rubber, and
The J friction coefficient is large.

The seating member 5 includes a washer portion 2 having a large diameter, a cylindrical portion 3 having a smaller diameter than the washer portion 2, and a nut portion 4. The washer part 2, the cylinder part 3, and the nut part 4 are integrated,
cannot be separated from each other. In this embodiment, the integral structure is achieved by welding. The material forming the seating member 5 is hot rolled soft steel plate. Here, the cylindrical body part 3 is integrally formed coaxially with one surface 20 of the comb 11 part 2. The outer diameter of the cylindrical body portion 3 is set to be approximately equal to the inner diameter of the central through hole 13 of the elastic rubber member 1. The nut portion 4 is coaxially and integrally formed on the other surface 21 side of the washer portion 2. Note that the center hole of the cylindrical body portion 3, the hole of the washer portion 2, and the hole of the nut portion 4 are in communication.

The bolt 6 as a bolt member consists of a head 60 and a shaft portion 61 having a threaded portion at the bottom.

(Function) A method of assembling the elastic support structure according to this embodiment will be explained. First, as in the conventional case, as shown in FIG. seated. In the seated state, the lower end of the shaft portion 12 of the elastic rubber member 1 projects below the seating hole 601, as shown in FIG. After seating as described above, the cylindrical portion 3 of the seating member 5 is inserted into the central through hole 13 of the elastic rubber member 1 from below. In this state, the seating member 5 does not fall from the central through hole 13 of the elastic rubber member 1 even if the seating member 5 is not held with fingers or the like. This is because the elastic rubber member 1 is made of a rubber member and therefore has a large frictional resistance.

Next, as in the conventional case, the first mounting member 700 is attached to the elastic rubber member 1.
Place it on the top surface of the head 11 of. Then, the shaft portion 61 of the bolt 6 with the washer 62 is passed through the bolt insertion hole 701 of the first mounting member 700, and the shaft portion 61 of the bolt 6 is further passed through the center hole of the cylindrical body portion 3 of the seating member 5. The male threaded portion of the bolt 6 and the female threaded portion of the nut portion 4 are screwed together.

When the bolt 6 and the nut part 4 are screwed together in this manner, the washer part 2 moves upward, that is, in the direction of the arrow shown in FIG. 2, as the bolt 6 and the nut part 4 are screwed together. Therefore, the shaft portion 12 is pressed by the base portion 2 . Therefore, the shaft portion 12 is deformed outward, that is, in the direction of the J-arrow B shown in FIG.
It becomes 2a. The shaft portion 1 further pressed by the washer portion 2
2 is deformed inward, that is, in the direction of arrow C shown in FIG. Strongly adheres to part 3.

Here, as the washer part 2 moves upward and approaches the second attachment member 600, the amount by which the washer part 2 avoids deforming the shaft part 12 increases, and thus the adhesion force also increases. Therefore, the above-mentioned adhesion force can prevent the cylindrical body portion 3 from moving around.

Here, the head 11 of the elastic rubber member 1 is attached to the first mounting member 700.
Because the elastic rubber member 1 is sandwiched between the first mounting member 700 and the second mounting member 600, and because the elastic rubber member 1 is made of rubber, it has a large frictional resistance. On the other hand, it is fixed without spinning.

As described above, since the elastic rubber member 1 is fixed and the close contact force prevents the cylindrical body part 3 from rotating, the nut part 4 which is integral with the cylindrical body part 3 can be prevented from spinning idle.

When vibrations, shocks, etc. are applied in the horizontal direction to the elastic support structure assembled as described above, the vibrations, shocks, etc. are absorbed by the elastic rubber member 1 as in the conventional case. Similarly, even if vertical vibrations or impacts are applied to this elastic support structure, the vibrations or impacts are absorbed by the elastic rubber member 1.

(Effects) As explained above, in the elastic support structure according to this embodiment, when the bolt 6 is screwed into the nut part 4, it is possible to reliably prevent the nut part 4 from spinning idle.

By the way, in the conventional system shown in FIG. 5, when deforming the shaft portion 102 of the elastic rubber member 100 into a flange shape, as the amount of deformation to avoid the flange shape increases, the bolt 500 and the nut 400 are screwed. The required force becomes large, and therefore the force required to prevent the nut 400 from spinning becomes large. Therefore, conventionally, as the amount of deformation to deform into a brim shape increases, the nut 400 must be fixed (pull) with a large force.In this regard, in this embodiment, the shaft portion 12 of the elastic rubber member 1 is shaped into a brim shape. As the deformation amount increases, the force (force in the direction of arrow C) that brings the cylindrical body part 3 into close contact with the cylinder body part 3 increases.That is, as the nut part 4 moves upward due to the screw engagement, the washer part 2 pushes against the elastic rubber member 1. This is because the time during which the shaft portion 12 is pressed and deformed increases, and as a result, the force in the direction of arrow C becomes larger than before the nut portion 4 moves upward.

In addition, in this embodiment, since the seating member 5 is provided in which the cylindrical body part 3 and the washer part 2 are integrated, the boundary between the cylindrical body part 3 and the washer part 2 is made of rubber. Therefore, there is no risk of rubber breakage and a long service life can be ensured, and there is no risk of poor wall thickness of the flange portion 12a.

(Other Embodiments) FIG. 4 shows a second embodiment of the present invention. In this second embodiment, a female threaded portion 15 is formed on the inner circumferential surface of the central through hole 13 of the elastic rubber member 1, and a cylindrical portion 3 of the seating member 5 is formed.
On the outer periphery of, there is a male threaded portion 32 that screws into the female threaded portion 15.
is formed.

In this embodiment, the cylindrical body part 3 is inserted into the central through hole 13 by screwing together the female threaded part 15 of the elastic rubber member 1 and the male threaded part 32 of the seating member 5. With such a configuration, the seating member 5 can be reliably prevented from coming off before the bolt 6 and the nut part 4 are screwed together.

FIG. 6 shows a third embodiment of the invention. In this third embodiment, a tapered surface 35 is formed at the lower end of the cylindrical body portion 3. By forming the tapered surface 35 in this way and using the elastic rubber member 1 according to the first embodiment in which the central through hole 13 has the same diameter as the entire length, the inner circumference of the shaft portion 12 of the elastic rubber member 1 and the taper The surfaces 35 can be brought into close contact effectively.

FIG. 7 shows a fourth embodiment of the invention. In this fourth embodiment, a projection 20a is provided on one surface 20 of the washer portion 2 of the seating member 5.
is formed. As shown in FIG. 7, the protrusion 20a has a tapered portion 20c that descends toward the inside and a tapered portion 20d that descends toward the outside. In this example, as shown in FIG.
The tapered portion 20c allows the inner circumferential portion of the shaft portion 12 and the cylindrical body portion 3 to be effectively brought into close contact with each other as the tube body portion 3 is embedded therein.

[Brief explanation of the drawing]

1 to 3 show a first embodiment of the present invention, FIG. 1 is a side view of the seating member, and FIG. 2 is a longitudinal sectional side view of the elastic support structure showing the process of assembly. FIG. 3 is a longitudinal sectional side view of the elastic support structure when the assembly is completed. FIG. 4 shows another embodiment of the present invention, and is a vertical sectional side view of the elastic support structure in a completed state. FIG. 5 shows a conventional example and is a vertical sectional side view of an elastic support structure. FIG. 6 shows a third embodiment of the present invention and is a diagram equivalent to FIG. 3, and FIG. 7 shows a fourth embodiment of the invention and is a diagram equivalent to FIG. 3. In the figure, 1 is an elastic rubber member, 11 is a head, 12 is a shaft, 1
3 is a central through hole, 5 is a seating member, 2 is a washer part, 3 is a cylinder part, 4 is a nut part, 20 is one side of the washer part, 21
6 indicates the other surface of the washer portion, and 6 indicates a bolt (bolt member).

Claims (2)

[Claims] (1) It is used between a first mounting member having a bolt insertion hole and a second plate-shaped mounting member having a seating hole, and is composed of a head portion having a central through hole and a shaft portion, and the shaft portion is an elastic rubber member inserted and locked into the seating hole and seated, the lower end of the shaft protruding below the seating hole; and a washer whose one surface is applied to the lower end surface of the shaft of the elastic rubber member. a cylindrical body part coaxially integrally formed on one surface of the washer part and inserted into the central through hole of the elastic rubber member; and a cylindrical body part coaxially integrally formed on the other surface of the washer part. a seating member having a nut portion; a bolt member that passes through the bolt insertion hole of the first mounting member, the cylindrical body portion of the seating member, and the washer portion and is screwed into the female thread portion of the nut portion; By screwing the bolt member and the nut part together and moving the washer part upward, the shaft part of the elastic rubber member is pressed and deformed, and the inner peripheral part of the shaft part is made into a cylinder. An elastic support structure, characterized in that it is brought into close contact with a body part, and the nut part is prevented from rotating due to this close contact. (2) A female thread is formed in the central through-hole of the elastic rubber member, and a male thread is formed on the outer periphery of the cylindrical portion of the seating member, and the male and female threads are screwed together. The elastic support structure according to claim 1, wherein the cylindrical body portion is inserted into the central through hole.