JPH0547584U - Vibration isolation type mounting structure for mounting members - Google Patents

Abstract

(57) [Abstract] [Purpose] The collar is smoothly inserted into the insertion hole of the mounting member to prevent the collar from falling off when the mounting member is attached to or detached from the mounted member, and to attach the mounted member to the mounting member. Cut off vibration transmission. [Structure] Head cover 13 through which mounting bolt 12 is inserted
The collar 14 having the first elastic body 21 fitted around the outer peripheral surface thereof is inserted into the insertion hole 13b. This collar is interposed between the insertion hole and the outer peripheral surface of the mounting bolt. The second elastic body 22 is interposed between the head cover and the cylinder head 11 to which the head cover is attached, and the third elastic body 23 is provided between the peripheral edge of the insertion hole of the head cover and the head 12a of the mounting bolt.
Is installed. On the outer peripheral surface of the first elastic body inserted into the insertion hole, a plurality of elastic projections 17a, which are the drop-out preventing means 17, are formed so that the height thereof becomes lower integrally with the first elastic body and toward the head of the mounting bolt. Is formed.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a mounting structure for blocking the vibration of a mounted member from being transmitted to the mounting member when the mounting member is mounted on a mounted member that vibrates by a mounting bolt.

[0002]

[Prior Art]

 Conventionally, in this type of mounting structure, the first elastic body is mounted on the outer peripheral surface of the insertion hole of the mounting member formed so that the thickness of the mounting portion is larger than the diameter of the mounting bolt that is inserted into the insertion hole of this mounting portion. The attached collar is inserted, the collar is interposed between the insertion hole and the outer peripheral surface of the mounting bolt, and the second elastic body is interposed between the mounting member and the mounted member to which the mounting member is mounted. The third elastic body is interposed between the peripheral edge of the insertion hole of the mounting member and the head of the mounting bolt, and the first elastic body is annularly formed on the outer peripheral surface of the collar or in the longitudinal direction of the outer peripheral surface of the collar. There is disclosed a vibration isolating mounting structure of a mounting member that is integrally formed as a plurality of elastic ridges along a straight line (Japanese Utility Model Publication No. 3-7625). In this mounting structure, the plurality of elastic ridges can block the transmission of the vibration of the mounted member to the mounting member, and the collar can be easily attached to and detached from the insertion hole. In addition, the collar does not fall off when the head cover is attached or removed.

[0003]

[Problems to be solved by the device]

 However, in the above-mentioned mounting structure, when the collar is inserted into the insertion hole of the head cover, there is a problem that the elastic projection is caught on the peripheral edge of the inlet of the insertion hole and is difficult to insert. Further, since the contact area between the elastic ridge and the inner surface of the insertion hole is relatively large, there is a problem that the pushing resistance of the collar into the insertion hole increases and the collar cannot be smoothly inserted into the insertion hole.

An object of the present invention is to allow the collar to be smoothly inserted into the insertion hole of the mounting member, prevent the collar from falling off when the mounting member is attached to and detached from the member to be attached, and to attach the member to be attached. Another object of the present invention is to provide a vibration-isolating mounting structure for a mounting member that can block the transmission of vibrations to the mounting member.

[0005]

[Means for Solving the Problems]

 A configuration of the present invention for achieving the above object will be described with reference to FIGS. 1, 4 and 6 corresponding to the embodiment. The present invention provides a mounting member 13 or 53 having a thickness of the mounting portion 13a or 53a larger than a diameter of a mounting bolt 12 inserted into an insertion hole 13b or 53b formed in the mounting portion 13a or 53a. Or a collar 14 inserted into the insertion hole 13b or 53b of 53 and interposed between the insertion hole 13b or 53b and the outer peripheral surface of the mounting bolt 12 and having the first elastic body 21, 51 or 71 attached to the outer peripheral surface. A second elastic body 22 interposed between the mounting member 13 or 53 and the mounted member 11 to which the mounting member 13 or 53 is mounted, and a peripheral edge of the insertion hole 13b or 53b of the mounting member 13 or 53. This is an improvement of the vibration isolation type mounting structure of the mounting member, which includes the third elastic body 23 or 73 interposed between the mounting bolt 12 and the head 12a. The characteristic configuration is that the collar 17 is prevented from falling off the insertion hole 13b or 53b when the collar 17 is inserted into the insertion hole 13b or 53b from the surface of the mounting portion 13a or 53a facing the mounted member 11. Where the means 17, 57 or 77 are provided.

[0006]

[Action]

 In the vibration isolation type mounting structure of the mounting member shown in FIG. 1, when the collar 14 is inserted into the insertion hole 13b of the mounting member 13, the collar 14 is inserted into the insertion hole 13b. The hole 13b is inserted into the insertion hole 13b while gradually increasing the crushed amount. In the vibration isolating mounting structure of the mounting member shown in FIG. 4, when the collar 14 is inserted into the insertion hole 53b of the mounting member 53 and the collar 14 reaches a predetermined position, the first elastic body 51 and the insertion hole 53b are inserted. The fall prevention means 57 provided prevents the collar 14 from falling off the insertion hole 53b. In the vibration isolation mounting structure of the mounting member shown in FIG. 6, when the collar 14 is inserted into the insertion hole 13b of the mounting member 13 and the collar 14 reaches a predetermined position, the first elastic body 71 and the third elastic body The collar 14 is prevented from falling out of the insertion hole 13b by the fall-off preventing means 77 provided at 73.

[0007]

【Example】

 Next, an embodiment of the present invention will be described in detail with reference to the drawings. In the first embodiment of the present invention, as shown in FIGS. 1 to 3, a head cover 13 is attached to an attached portion 11a of a cylinder head 11 of an engine by an attachment bolt 12. A female screw 11b is formed on the mounted portion 11a of the cylinder head 11, and an insertion hole 13b having the same hole center as the female screw 11b is formed on the mounting portion 13a of the head cover 13 facing the mounted portion 11a. The thickness of the mounting portion 13a of the head cover 13 is formed to be larger than the diameter of the mounting bolt 12 (FIG. 1).

The color 14 having the first elastic body 21 fitted around the outer peripheral surface thereof is inserted into the insertion hole 13 b of the head cover 13, and the collar 14 is interposed between the insertion hole 13 b and the outer peripheral surface of the mounting bolt 12. To be dressed. An annular groove 13c is formed near the base end of the mounting portion 13a of the head cover 13 and on the surface of the mounting portion 13a facing the mounted portion 11a of the cylinder head 11. An annular second elastic body 22 is formed so that it can be inserted into the groove 13c, and the second elastic body 22 is formed such that its height is larger than the depth of the groove 13c. With the second elastic body 22 inserted in the concave groove 13c, a part of the second elastic body 22 protrudes from the concave groove 13c toward the mounted portion 11a of the cylinder head 11, and the protruding second elastic body 22 The tip surface is adapted to abut on the surface of the mounted portion 11a facing the mounting portion 13a. A third elastic body 23 and a washer 16 are interposed between the surface of the mounting portion 13a opposite to the surface facing the mounted portion 11a and the head 12a of the mounting bolt 12. The third elastic body 23 is bonded to the washer 16. The first, second and third elastic bodies 21, 22, 23 are made of rubber (FIG. 1).

The characteristic structure of the present embodiment is that the outer peripheral surface of the first elastic body 21 inserted into the insertion hole 13b is provided with a drop-out preventing means 17 for preventing the collar 14 from falling out of the insertion hole 13b. It is in. The drop-out preventing means 17 is a plurality of elastic projections 17a provided integrally with the first elastic body 21, and these elastic projections 17a are formed so that the height thereof becomes lower toward the head portion 12a of the mounting bolt 12. (FIGS. 1 and 2). In this example, three elastic protrusions 17a are formed on the outer peripheral surface of the first elastic body 21 at substantially equal intervals (FIG. 3). The outer peripheral surface of the first elastic body 21 is formed so as to taper off toward the head 12a of the mounting bolt 12 (FIGS. 1 and 2).

When the head cover 13 configured as described above is attached to the attached portion 11 a of the cylinder head 11, first, the collar 14 is inserted into the insertion hole 13 b of the head cover 13 in the direction of the solid line arrow in FIG. At this time, since the outer peripheral surface of the first elastic body 21 circumferentially attached to the collar 14 is formed to be tapered, the tip of the collar 14 is smoothly caught without the tip of the collar 14 being caught on the inlet edge of the insertion hole 13b. It is inserted into the insertion hole 13b. When the elastic projection 17a reaches the entrance edge of the insertion hole 13b by pushing the collar 14 into the insertion hole 13b, the elastic projection 17a abuts the entrance edge of the insertion hole 13b, but the height of the elastic projection 17a inserts the collar 14. Since it is formed so as to gradually increase in height, the elastic protrusion 17a is crushed without difficulty and inserted into the insertion hole 13b. As a result, the elastic protrusion 17a is not scratched and damaged at the inlet edge of the insertion hole 13b. When the collar 14 is further pushed into the insertion hole 13b, the contact area between the elastic projection 17a and the inner surface of the insertion hole 13b is small, so the pushing resistance of the collar 14 is small, and the collar 14 is smoothly inserted into the insertion hole 13b. To be done.

Next, the second elastic body 22 is inserted into the concave groove 13c of the head cover 13 so that the mounting portion 13a of the head cover 13 faces the mounted portion 11a of the cylinder head 11. At this time, since the elastic protrusion 17a is pressed against the inner peripheral surface of the insertion hole 13b, the collar 14 does not fall off. In this state, the washer 16 to which the third elastic body 23 is attached is fitted into the mounting bolt 12 and the bolt 12 is inserted into the insertion hole 13b and screwed into the female screw 11b. As a result, the head cover 13 is attached to the attached portion 11a of the cylinder head 11 via the first elastic body 21, the second elastic body 22, the third elastic body 23, and the elastic protrusion 17a, so that the vibration of the cylinder head 11 occurs. Is not attenuated by the elastic bodies 21, 22, 23 and the elastic protrusions 17 and transmitted to the head cover 13.

4 and 5 show a second embodiment of the present invention. 4 and 5, the same reference numerals as those in the first embodiment indicate the same parts. A plurality of detachment preventing means 57 for preventing the collar 14 from coming off the insertion hole 53b are provided on the outer peripheral surface of the first elastic body 51 which is attached to the outer peripheral surface of the collar 14 integrally with the first elastic body 51. And an annular recess 57b formed on the inner peripheral surface of the insertion hole 53b of the head cover 53 and to which the elastic projection 57a inserted in the insertion hole 53b is locked. The plurality of elastic protrusions 57a are formed so that the height thereof becomes lower toward the head 12a of the mounting bolt 12 (FIG. 4), and these elastic protrusions 57a are, in this example, the outer periphery of the substantially center of the first elastic body 51. Three pieces are formed on the surface at equal intervals (FIG. 5). In this example, the ring-shaped recess 57b has a hole diameter substantially the same as the diameter of the outermost ends of the three elastic protrusions 57a, and the cylinder recessed portion 57b is mounted on the head cover 53 from a surface opposite to the mounted portion 11a of the mounting portion 53a. It is a counterbore hole formed toward the head 11 up to the substantial center of the insertion hole 53b. The outer peripheral surface of the first elastic body 51 is formed so as to taper toward the head 12a of the mounting bolt 12. Further, the annular second elastic body 22 is inserted into the annular concave groove 53c of the head cover 53 (FIG. 4).

The mounting procedure for mounting the thus constructed head cover 53 on the mounted portion 11 a of the cylinder head 11 is performed by inserting the elastic projection 57 a when the collar 14 is inserted into the insertion hole 53 b and reaches a predetermined position. It is similar to the first embodiment except that it is fixed to the annular recess 57b formed in the hole 53b, and thus the repeated description is omitted.

6 and 7 show a third embodiment of the present invention. 6 and 7, the same reference numerals as those of the first embodiment indicate the same parts. The fall prevention means 77 for preventing the collar 14 from coming off the insertion hole 13b is formed integrally with the first elastic body 71 on the outer peripheral surface of the first elastic body 71 inserted into the through hole 73a of the third elastic body 73. It has a plurality of elastic projections 77a provided and an annular recess 77b formed on the inner peripheral surface of the through hole 73a of the third elastic body 73 and to which the elastic projection 77a inserted into the through hole 73a is locked. The plurality of elastic protrusions 77a are formed so that the height thereof decreases as they go toward the head 12a of the mounting bolt 12 (FIG. 6). In this example, these elastic protrusions 77a are formed at the outer periphery of the substantially center of the first elastic body 71. Three pieces are formed on the surface at equal intervals (FIG. 7). The annular recess 77b is an annular groove corresponding to the vertical sectional shape of the elastic protrusion 77a in this example. The outer peripheral surface of the first elastic body 71 is tapered toward the head 12a of the mounting bolt 12 (FIG. 6).

The mounting procedure for mounting the thus constructed head cover 13 on the mounted portion 11 a of the cylinder head 11 is performed by inserting the collar 14 into the through hole 13 b of the head cover 13 and the through hole 73 a of the third elastic body 73. It is the same as the first embodiment except that the elastic projection 77a is locked in the annular recess 77b formed in the through hole 73a when the predetermined position is reached, and therefore the repeated description is omitted. ..

Although the cylinder head is used as the member to be mounted in the first to third embodiments, this is only an example and may be a cylinder block or other members as long as it vibrates. Further, although the engine head cover is mentioned as the mounting member, the present invention is not limited to this, and an intake manifold, a rocker cover, or another member may be used as long as it is a member mounted on a vibrating member such as a cylinder head or a cylinder block. Also, in the first to third embodiments, three elastic protrusions are formed on the outer peripheral surface of the first elastic body, but two or four or more elastic protrusions are formed on the outer peripheral surface of the first elastic body. You may. Further, in the second embodiment, the annular concave portion to which the elastic projection is locked has a hole diameter approximately the same as the diameter of the outermost ends of the three elastic projections connected to the insertion hole, and the mounted portion of the mounting portion is the same. The counterbore hole was formed from the surface on the opposite side to the cylinder head to the approximate center of the insertion hole. However, if the elastic protrusion can be locked, the elastic protrusion of the first elastic body inserted in the insertion hole can be used. It may be an annular groove formed on the inner peripheral surfaces of the insertion holes facing each other. Furthermore, in the third embodiment described above, the annular groove corresponding to the longitudinal cross-sectional shape of the elastic projection is given as the annular recess in which the elastic projection is locked. However, if the elastic projection can be locked, the outermost of the three elastic projections can be obtained. It may be a counterbore hole having a hole diameter substantially the same as the diameter connecting the ends and formed from the surface where the washer of the third elastic body is fixed to the through hole of the third elastic body toward the insertion hole.

[0017]

[Effect of the device]

 As described above, according to the present invention, the collar having the first elastic body fitted around the outer peripheral surface is inserted into the insertion hole of the attachment member through which the attachment bolt is inserted, and the attachment member and this attachment member are attached. The second elastic body is interposed between the mounting member and the third elastic body between the periphery of the insertion hole of the mounting member and the head of the mounting bolt, and the collar is mounted on the mounting portion. Since the first elastic body, the insertion hole, and the third elastic body are provided with fall-off preventing means for preventing the collar from falling off the insertion hole when inserted into the insertion hole from the surface facing the member, the collar is attached to the attachment member. When the elastic projection is inserted into the insertion hole, the elastic projection is naturally crushed and inserted into the insertion hole, and the elastic projection is not scraped and damaged at the inlet edge of the insertion hole. Further, since the contact area between the elastic protrusion and the inner surface of the insertion hole is small, the pushing resistance of the collar is small. As a result, the collar can be smoothly inserted into the insertion hole of the mounting member. Further, since the collar inserted into the insertion hole does not fall off from the mounting member, the mounting work of the mounting member to or from the mounted member becomes easy. Further, since the mounting member is mounted on the mounted member via the first elastic body, the second elastic body, the third elastic body and the elastic protrusion, the vibration of the mounted member is damped by these elastic body and elastic protrusion, It is possible to block the transmission of the vibration of the mounted member to the mounting member.

[Brief description of drawings]

FIG. 1 is a sectional view of an essential part showing a vibration isolating mounting structure of a mounting member according to a first embodiment of the present invention.

FIG. 2 is a sectional view showing a state before a collar is inserted into an insertion hole of a head cover.

3 is a cross-sectional view taken along the line AA of FIG.

FIG. 4 is a sectional view corresponding to FIG. 1, showing a vibration isolating mounting structure for a mounting member according to a second embodiment of the present invention.

5 is a cross-sectional view taken along the line BB of FIG.

FIG. 6 is a sectional view corresponding to FIG. 1, showing a vibration isolating mounting structure for a mounting member according to a third embodiment of the present invention.

7 is a sectional view taken along line CC of FIG.

[Explanation of symbols]

 11 Cylinder Head (Mounted Member) 12 Mounting Bolt 12a Head 13,53 Head Cover (Mounting Member) 13a, 53a Mounting Part 13b, 53b Insertion Hole 14 Collar 17,57,77 Fall-out Prevention Means 21,51,71 First Elasticity Body 22 Second elastic body 23,73 Third elastic body

Claims (1)

[Scope of utility model registration request] 1. The thickness of the mounting portion (13a, 53a) is the same as that of the mounting portion (13a, 53a).
a, 53a) is formed in the insertion hole (13b, 53b) is larger than the diameter of the mounting bolt (12) inserted through the mounting member (13, 53), the mounting member (13, 53) through hole (13, 53) 13b, 53b) is inserted between the insertion hole (13b, 53b) and the outer peripheral surface of the mounting bolt (12), and the first elastic body (21, 51, 71) is circumferentially attached to the outer peripheral surface. Second elastic body (22) interposed between the collar (14), the attachment member (13, 53) and the attachment target member (11) to which the attachment member (13, 53) is attached
And a third elastic body (23, 73) interposed between the periphery of the insertion hole (13b, 53b) of the mounting member (13, 53) and the head (12a) of the mounting bolt (12). In a vibration isolation type mounting structure of a mounting member comprising, the collar (14) from the surface of the mounting portion (13a, 53a) facing the mounted member (11) to the insertion hole (13b, 53b) Vibration isolating mounting structure for a mounting member, characterized in that drop prevention means (17, 57, 77) for preventing the collar (14) from falling out of the insertion hole (13b, 53b) when inserted is provided. .