JPH08261287A - Damper - Google Patents

Abstract

PURPOSE: To enlarge the degree of freedom of installing position of a sensor detected section without large-sizedly forming the whole of damper by protruding a part of a plate face crossing the axial line of a sensor detected part provided in a sleeve made of plate metal toward one side. CONSTITUTION: A hub 1 and a mass body 4 are severally annularly formed of fixed metal, and a sleeve 2 is annularly formed of a magnetic plate metal, and fitted on the outer periphery of the cylindrical part 1a of the hub 1 in a sleeve body 2a, and a radial direction part 2e is partially protruded toward one axial side by a press, and convex-shaped sensor detected parts 5 are provided as many as desired in sets. An elastic body 3 is annularly formed of a fixed rubberlike elastic material, and at the same time as forming, severally vulcanizedly adhered to the outer periphery of the sleeve body 2a and the inner periphery of the mass body 4. In the damper, a rotating speed detecting sensor is arranged on the right of the sensor detected part 5, and at every time when the sensor detected part 5 is regularly opposite to the sensor during the rotation of the damper, the regular opposite state can be magnetically detected by the sensor.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a damper for absorbing and suppressing vibration generated in various rotary drive systems such as a crankshaft of an automobile engine.

[0002]

2. Description of the Related Art Conventionally, as a kind of torsional damper, one having a function of being detected with respect to a sensor for detecting a rotation speed has been developed (for example, the actual opening number 5-9255).
No. 4), this damper has the following problems.

As shown in FIGS. 5 and 6, in a conventional damper, a rotation speed detecting sensor (not shown) is used.
Is provided as a protrusion that protrudes outward in the radial direction, and the sensor-detected portion 21 having this protrusion is integrally formed on one axial end of a sleeve 22 made of sheet metal. It is integrally formed with the outer peripheral edge of the outward bent portion 23. The radial position of the sensor detected portion 21 is determined in accordance with the radial position of the magnetic proximity type rotational speed detection sensor. Therefore, as the setup, first, the outward bending portion is aligned with the radial position of the sensor. The outer diameter dimension of the sensor detected portion 2 is defined on the outer peripheral edge of the outer bent portion 23.
1 is provided. Therefore, when the position of the sensor in the radial direction is changed, the outer diameter dimension of the outer bent portion 23 must be changed according to the change, and the sensor detected portion can be changed without changing the outer diameter dimension of the outer bent portion 23. It cannot be convenient to change only the radial position of 21.

As described above, since the protruding sensor detected portion 21 is integrally formed with the outer peripheral edge of the outwardly bent portion 23 integrally formed with one end of the sleeve 22 made of sheet metal in the axial direction, the sleeve 22 is formed. May increase in diameter, and in some cases, the outer diameter of the outer bent portion 23 may exceed the outer diameter of the mass body 24. Therefore, there is a problem that the sleeve 22 and the entire damper are increased in size. Further, the outer bent portion 23 is provided on the sleeve 22 as described above, and the outer bent portion 2 is provided.
When the sensor detected portion 21 is provided in 3, the operation of the mass body 24 that relatively moves in the rotational direction with respect to the hub 26 and the sleeve 22 within the elastic range of the elastic body 25 at the time of operation is prevented. , The mass body 24 and the outer bent portion 23 must not be in contact with each other, and therefore the mass body 2
An axial gap x must be set between 4 and the outward bend 23. Therefore, this results in a long axial length of the damper, which also increases the size of the entire damper.

[0005]

SUMMARY OF THE INVENTION In view of the above points, the present invention provides a damper that has a greater degree of freedom in the installation position of the detected portion of the sensor than before and does not increase the size of the entire damper. To aim.

[0006]

In order to achieve the above object, a damper according to claim 1 of the present invention is a damper in which a sensor-detected portion is provided on a sleeve made of sheet metal, wherein the sensor-detected portion has a central axis line. In contrast, it was decided that a part of the intersecting plate surface was projected in one axial direction by pressing. A damper according to claim 2 of the present invention is a damper in which a sensor detected portion is provided on a sleeve made of sheet metal,
It is assumed that the sensor detected portion is formed by exposing a part of the plate surface by providing a window portion on a cover made of a rubber-like elastic material that covers the plate surface intersecting the central axis. .

According to a third aspect of the present invention, in the damper according to the second aspect, the cover is integrally formed with an elastic body made of a rubber-like elastic material that is vulcanized and bonded to the sleeve. According to a fourth aspect of the present invention, in the damper according to the first to third aspects, the sleeve is fitted on the outer peripheral side of the cylindrical portion of the hub and is bent inward in the radial direction at one end portion in the axial direction of the sleeve. The inner bent portion is integrally formed, and the sensor detected portion is provided on the inner bent portion.

[0008]

In the damper according to claim 1 of the present invention having the above-mentioned structure, a part of the plate surface where the sensor detected portion intersects with the central axis is projected in one axial direction by pressing. In addition, it is optional where the sensor detected portion is provided on the plate surface. Further, in the damper according to claim 2 of the present invention having the above-mentioned structure, the window portion is provided in the cover made of a rubber-like elastic material which covers the plate surface where the sensor detected portion intersects the central axis, and the plate surface Since a part of the above is exposed on the surface, it is optional as to where on the plate surface the sensor detected portion is provided as in the damper according to the first aspect.

In addition to this, in the damper according to claim 3 of the present invention having the above-mentioned structure, since the covering body is integrally formed with the elastic body made of rubber-like elastic material vulcanized and bonded to the sleeve. The elastic material can be vulcanized and molded once. In addition to this, in the damper according to claim 4 of the present invention having the above-mentioned configuration, the sleeve is fitted on the outer peripheral side of the cylindrical portion of the hub, and is bent inward in the radial direction at one axial end portion of the sleeve. Since the inner bent portion is integrally molded and the sensor detected portion is provided on the inner bent portion, the diameter of the sleeve does not increase. Further, since the hub and the inwardly bent portion do not move relative to each other, it is not necessary to set an axial gap therebetween.

[0010]

Embodiments of the present invention will now be described with reference to the drawings.

First Embodiment: As shown in FIGS. 1 and 2, a sleeve 2 is fitted on the outer peripheral side of a cylindrical portion (also referred to as a rim portion) 1a of a hub 1, and on the outer peripheral side of the sleeve 2. A mass body (also referred to as a vibrating ring) 4 is connected via an elastic body 3, and an inward bent portion 2b bent inward in the radial direction is integrally formed at one axial end portion of the sleeve 2, and the inward bent portion is formed. 2b includes a first radial portion 2c integrally formed on one axial end of the sleeve body 2a, a cylindrical portion 2d integrally formed on an inner peripheral edge of the first radial portion 2c, and an axis of the cylindrical portion 2d. The second radial direction portion 2e integrally formed at the other end portion in the direction is provided, and the second radial direction portion 2e having an annular shape is partially projected by the press in one axial direction (rightward in FIG. 1). The required number of convex sensor-detected portions 5 are provided in equal distribution.

The hub 1 and the mass body 4 are each formed in an annular shape from a predetermined metal such as cast iron. Sleeve 2
Is formed into an annular shape by a sheet metal which is a magnetic body, and is fitted to the outer peripheral side of the cylindrical portion 1a of the hub 1 in the sleeve body 2a. The elastic body 3 is formed into an annular shape by a predetermined rubber-like elastic material, and is simultaneously vulcanized and adhered to the outer peripheral surface of the sleeve body 2a and the inner peripheral surface of the mass body 4 simultaneously with the molding. The second radial portion 2e of the sleeve 2 is orthogonal to the central axis 0 of the damper, but it does not have to be a right angle as long as it intersects the central axis 0.

With respect to the damper having the above-mentioned structure, a sensor (not shown) for detecting the rotational speed is arranged on the right side of the sensor detected portion 5 in the figure, and the distance from this sensor to the sensor detected portion 5 is increased. Since it is shorter than the distance from the sensor to the second radial portion 2e, it is possible for the sensor to magnetically detect each time the sensor detected portion 5 faces the sensor while the damper is rotating. And this damper has the following effects.

The sensor detected part 5 can be provided at an arbitrary radial position of the second radial portion 2e without changing the inner diameter of the second radial portion 2e. Therefore, the degree of freedom with respect to the installation position of the sensor detected part 5 can be expanded more than ever before. An inner bent portion 2b bent inward in the radial direction is integrally formed with one end portion of the sleeve 2 in the axial direction.
Since the sensor detected portion 5 is provided in the sleeve 2, the sleeve 2 does not have a large diameter. Therefore, it is possible to prevent the entire damper from increasing in size. Further, since the hub 1 and the sleeve 2 do not move relative to each other, one end surface (the right end surface in the figure) of the cylindrical portion 1a of the hub 1 in the axial direction and the sleeve 2
It is not necessary to set an axial gap between the first radial direction portion 2c and the first radial direction portion 2c, and both can be arranged in contact with each other as shown in the drawing. Therefore, since the axial length of the damper does not become long, it is possible to prevent the tamper from increasing in size also in this respect. Since the sleeve 2 is formed by bending a sheet metal at right angles over three times, the strength is high. Since the sensor detected portion 5 is arranged on the inner peripheral side of the cylindrical portion 1a of the hub 1 so as to be surrounded by the hub 1, dust such as dust or mud is unlikely to adhere to the sensor detected portion 5.

Second Embodiment: As shown in FIGS. 3 and 4, a sleeve 2 is fitted on the outer peripheral side of a cylindrical portion (also referred to as a rim portion) 1a of a hub 1, and the outer peripheral side of the sleeve 2 is attached. A mass body (also referred to as a vibrating ring) 4 is connected via an elastic body 3, and an inward bent portion 2b bent inward in the radial direction is integrally formed at one axial end portion of the sleeve 2, and the inward bent portion is formed. 2b includes a first radial portion 2c integrally formed on one axial end of the sleeve body 2a, a cylindrical portion 2d integrally formed on an inner peripheral edge of the first radial portion 2c, and an axis of the cylindrical portion 2d. The second radial portion 2e integrally formed at the other end of the direction. A cover 6 made of a rubber-like elastic material is applied over the entire surface of one surface of the inwardly bent portion 2b, and the second radial portion 2e is formed.
In this case, a window 6a is provided in the cover 6 to expose a part of the second radial portion 2e on the surface, and a required number of sensor-detected portions 5 in a metal-exposed state are provided at equal intervals.
The cover 6 is formed integrally with the elastic body 3.

The hub 1 and the mass body 4 are each formed in an annular shape from a predetermined metal such as cast iron. Sleeve 2
Is formed into an annular shape by a sheet metal which is a magnetic body, and is fitted to the outer peripheral side of the cylindrical portion 1a of the hub 1 in the sleeve body 2a. The elastic body 3 is formed into an annular shape by a predetermined rubber-like elastic material, and is simultaneously vulcanized and adhered to the outer peripheral surface of the sleeve body 2a and the inner peripheral surface of the mass body 4 simultaneously with the molding. The cover 6 is formed into an annular shape by a rubber-like elastic material of the same kind as the elastic body 3, and at the same time as the forming, the inwardly bent portion 2 is formed.
It is vulcanized and adhered to one surface of b. The second radial portion 2e of the sleeve 2 is orthogonal to the central axis 0 of the damper, but it does not have to be a right angle as long as it intersects the central axis 0.

With respect to the damper having the above-described structure, a rotational speed detecting sensor (not shown) is arranged on the right side of the sensor detected portion 5 in the drawing, and the sensor is provided between the sensor and the second radial portion 2e. Since the sensitivity differs depending on whether or not the rubber-like elastic covering 6 is interposed (not in the window 6a), it is possible that the sensor detected portion 5 faces the sensor while the damper is rotating. Each time, the sensor can detect magnetically. And this damper has the following effects.

The sensor detected portion 5 can be provided at an arbitrary radial position of the second radial portion 2e without changing the inner diameter of the second radial portion 2e. Therefore, the degree of freedom with respect to the installation position of the sensor detected part 5 can be expanded more than ever before. An inner bent portion 2b bent inward in the radial direction is integrally formed with one end portion of the sleeve 2 in the axial direction.
Since the sensor detected portion 5 is provided in the sleeve 2, the sleeve 2 does not have a large diameter. Therefore, it is possible to prevent the entire damper from increasing in size. Further, since the hub 1 and the sleeve 2 do not move relative to each other, one end surface (the right end surface in the figure) of the cylindrical portion 1a of the hub 1 in the axial direction and the sleeve 2
It is not necessary to set an axial gap between the first radial portion 2c and the first radial portion 2c, and both can be arranged in contact with each other. Therefore, since the axial length of the damper does not become long, it is possible to prevent the tamper from increasing in size also in this respect.

Since the sleeve 2 is formed by bending a sheet metal at right angles over three times, it has high strength. Since the sensor detected portion 5 is arranged on the inner peripheral side of the cylindrical portion 1 a of the hub 1 so as to be surrounded by the hub 1, dust such as dust or mud is unlikely to adhere to the sensor detected portion 5. Since the covering body 6 is integrally formed with the elastic body 3,
The elastic material can be vulcanized and molded once. Further, by masking the portion that becomes the window portion 6a during the vulcanization molding, the formation of the sensor detected portion 5 can be finished at the same time when the vulcanization molding is completed. Therefore, molding is easy from these points. Since the substantially entire surface of the inwardly bent portion 2b is covered with the cover 6 made of a rubber-like elastic material, a soundproofing effect can be expected.

[0020]

The present invention has the following effects.

That is, first, in the damper according to claim 1 of the present invention having the above structure, a part of the plate surface where the sensor detected portion intersects the central axis is projected in one axial direction by pressing. Therefore, even if the inner diameter of the plate surface is not changed, the sensor detected portion can be provided at an arbitrary radial position on the plate surface. Therefore, the degree of freedom with respect to the installation position of the sensor detected portion can be expanded more than ever before. Further, in the damper according to claim 2 of the present invention having the above-mentioned structure, the window portion is provided in the cover made of a rubber-like elastic material which covers the plate surface where the sensor detected portion intersects the central axis, and the plate surface Since a part of the plate is exposed on the surface, the sensor detected portion can be provided at an arbitrary radial position on the plate surface without changing the inner diameter of the plate surface. Therefore, the degree of freedom with respect to the installation position of the sensor detected portion can be expanded more than ever before. Further, by covering the plate surface with a rubber-like elastic material, a soundproof effect can be expected.

Further, in the damper according to the third aspect of the present invention having the above structure, in addition to this, since the covering body is integrally molded with the elastic body, the elastic material can be vulcanized and molded only once. . Further, by masking the portion that will be the window portion during this vulcanization molding, the formation of the sensor detected portion can be completed at the same time as the end of vulcanization molding. Therefore, molding is easy from these points. In addition, in the damper according to claim 4 having the above structure, in addition to this, the sleeve is fitted on the outer peripheral side of the cylindrical portion of the hub, and is bent inward in the radial direction at one axial end of the sleeve. Since the bent portion is integrally formed and the sensor detected portion is provided on the inner bent portion, the sleeve does not have a large diameter. Further, since the hub and the inwardly bent portion do not move relative to each other, it is not necessary to set an axial gap therebetween. Therefore, it is possible to prevent the damper from increasing in size.

[Brief description of drawings]

FIG. 1 is a half sectional view of a damper according to a first embodiment of the present invention.

FIG. 2 is a view on arrow B in FIG.

FIG. 3 is a half sectional view of a damper according to a second embodiment of the present invention.

FIG. 4 is a view in the direction of arrow C in FIG.

FIG. 5 is a half-cut sectional view of a damper according to a conventional example.

FIG. 6 is a view on arrow A in FIG.

[Explanation of symbols]

 1 Hub 1a Cylindrical part 2 Sleeve 2a Sleeve main body 2b Inner bent part 2c First radial direction part 2d Cylindrical part 2e Second radial direction part 3 Elastic body 4 Mass body 5 Sensor detected part 6 Cover 6a Window part 0 Center Axis

Claims (4)

[Claims] 1. A damper comprising a sleeve (2) made of sheet metal and provided with a sensor detected part (5), wherein the sensor detected part (5) is one of plate surfaces intersecting with a central axis (0). A damper characterized in that the part is projected in one axial direction by pressing. 2. A damper comprising a sheet metal sleeve (2) provided with a sensor detected portion (5), wherein the sensor detected portion (5) covers a plate surface intersecting with a central axis (0). The damper (1), wherein a window (6a) is provided on the cover (6) made of the rubber-like elastic material to expose a part of the plate surface. 3. The damper according to claim 2, wherein the cover (6) is integrally formed with an elastic body (3) made of a rubber-like elastic material that is vulcanized and bonded to the sleeve (2). damper. 4. The damper according to claim 1, wherein the sleeve (2) is fitted on the outer peripheral side of the cylindrical portion (1a) of the hub (1), and the sleeve (2) has a radial direction at one axial end thereof. The inwardly bent portion (2b) bent inward is integrally molded,
A damper, wherein a sensor detected part (5) is provided on the inwardly bent part (2b).