KR101046402B1 - Vibration sensor - Google Patents

Abstract

The present invention relates to a vibration sensing sensor mounted on a vibration generating part in which vibration is generated by a fastening member to detect vibration. The present invention has a plate-like seating portion 52 seated on the vibration generating part, and a shaft portion 54 formed on the seating portion 52 in the same manner and having an outward stepped portion 54a at an end thereof. A sleeve 50 fixedly fixed to the vibration generating part by a fastening member; A vibration sensing member (60) fitted to the shaft portion (54) of the sleeve (50) to sense vibration on the seating portion (52) of the sleeve (50) and apply the sensed vibration as a voltage signal; A disk spring 70 which elastically supports the vibration sensing member 60; It has an inner diameter d that is larger than the inner diameter of the disk spring 70 and corresponds to the outer diameter of the shaft portion 54 of the sleeve 50. The inner diameter d causes the outward step 54a of the shaft portion 54. The stop ring for holding the disk spring 70 while being fixed to the outwardly stepped portion 54a in a state of being fitted into the shaft portion 54 by being press-fitted through 80); And an inner diameter expanding means for expanding the inner diameter d of the stop ring 80 such that the stop ring 80 penetrates the outward step 54a formed in the shaft portion 54 of the sleeve 50. It includes, the stop ring 80, characterized in that it has a circular cross-section so that the pressing force for pressing the disk spring 70 acts the same size in all directions. In the present invention, the sleeve 50 having the seating portion 52 and the shaft portion 54 is composed of a unitary body, and the stop ring 80 fixes the disk spring 70 to the shaft portion 54, thereby providing a vibration detecting sensor. It can be manufactured easily.

Description

Vibration Sensors {SENSOR FOR VIBRATION PICKUP}

The present invention relates to a vibration detection sensor mounted on a vibration generating part that generates vibration, and to a vibration detection sensor for converting and applying the detected vibration into a voltage.

In general, the vibration sensor is mounted on an internal combustion engine that generates vibration to detect knocking, and when knocking is detected, the detected knocking signal is applied to the controller. Therefore, the controller controls the ignition timing of the internal combustion engine to suppress the occurrence of knocking. The vibration sensor mounted on the internal combustion engine mainly uses piezoelectric ceramics that generate voltage while being deformed by external physical forces.

Attached Figure 1 shows a vibration sensor according to the prior art mainly using such piezoelectric ceramic, vibration detection disclosed in US Patent No. 6,655,352 (name: INTEGRATED BOLT TWO-PIECE SLEEVE DESIGN FOR FLAT RESPONSE KNOCK SENSOR) The sensor is shown.

Vibration detection sensor according to the prior art as shown is mounted to the internal combustion engine by a bolt (not shown) that is fastened to the internal combustion engine not shown through the hollow 10a of the sleeve 10. Then, the knocking of the internal combustion engine is detected through the piezoelectric ceramic 12 fixed to the shaft of the sleeve 10. The piezoelectric ceramic 12 is fixed to the shaft of the sleeve 10 together with the terminal disk 14, the insulating disk 16 and the weight 18 as shown, and a leaf spring fixed on the weight 18 ( Elastically supported by DS). At this time, the disk spring (DS) is fixed by the projection (10b) as shown to protrude from the sleeve (10).

Meanwhile, the piezoelectric ceramics 12, the terminal disks 14, the insulating disks 16, the weights 18, and the disk springs DS fixed to the shaft of the sleeve 10 are made of synthetic resin, urethane or poly-based plastic material. As shown in the figure, it is surrounded by the mold cover MC to be supported and protected. The mold cover MC is molded by an injection mold after the piezoelectric ceramic 12, the terminal disk 14, the insulating disk 16, the weight 18, and the disk spring DS are fixed to the sleeve 10. The end of the inner circumferential surface is fixed to the sleeve 10 as it is inserted into the mold accommodating groove 10c formed on the outer circumferential surface of both ends of the sleeve 10 and cured.

Vibration detection sensor according to the prior art as described above is fixed by the disk spring (DS) is caught on the projection (10b) formed on the upper end of the sleeve 10, the disk spring (DS) can be easily fixed to the sleeve (10). have. At this time, the sleeve 10 is configured to be separated into the shaft portion 10-1 and the plate-shaped seating portion 10-2 as shown for fixing the disk spring (DS). The shaft portion 10-1 and the seating portion 10-2 are integrally coupled to each other by assembly after the disk spring DS is fitted to the shaft portion 10-1. Of course, the disk spring DS has an inner diameter corresponding to the outer diameter of the shaft portion 10-1 so as to be caught by the projection 10b.

However, the vibration sensing member according to the related art is not only constituted by the sleeve 10 separated into the shaft portion 10-1 and the seating portion 10-2 as described above, but also the shaft portion 10-1. And since the seating portion 10-2 is integrally coupled by the assembly, the configuration of the sleeve 10 is not only difficult, but also hassle to perform the assembly process.

Technical Challenge

SUMMARY OF THE INVENTION The present invention has been made to solve the above conventional problem, wherein the sleeve having the shaft portion and the seating portion is formed in a single body, and a separate member for integrally fixing the disk spring to the shaft portion of the sleeve is provided, so that the sleeve has a single body. An object of the present invention is to provide a vibration sensing member capable of fixing the disk spring to the shaft portion of the sleeve even if it is formed as a.

In particular, an object of the present invention is to provide a vibration sensing member capable of pressing and fixing a disk spring while a separate member fixing the disk spring to the shaft portion of the sleeve is supported by one side of the sleeve shaft portion.

Technical solution

The above-described object is a vibration sensing sensor mounted on a vibration generating part in which vibration is generated by a fastening member and detecting vibrations, wherein the plate-shaped seating part seated on the vibration generating part and the mounting part are formed in the same body. A sleeve having an shaft portion having an outwardly stepped end and fixedly on the vibration generating part by the fastening member; A vibration sensing member fitted to the shaft portion of the sleeve to sense vibration on the seating portion of the sleeve and apply the detected vibration as a voltage signal; A disk spring that elastically supports the vibration sensing member; It has an inner diameter corresponding to the shaft portion of the sleeve while being larger than the inner diameter of the disk spring, and through the outward end jaw of the shaft portion by this inner diameter, is fastened to the outward step in the state fitted to the shaft portion, and fixed to the outward step A stop ring for supporting the disk spring while being fixed; And inner diameter expansion means for expanding the inner diameter of the stop ring such that the stop ring press-throughs the outward stepped portion formed in the shaft portion of the sleeve, wherein the stop ring has the same pressing force for pressing the disk spring in all directions. It is achieved by a vibration sensor, characterized in that it has a circular cross section to act in size.

1 is a longitudinal sectional view of a vibration sensor according to the prior art;

2 is an exploded perspective view of a vibration sensor according to an embodiment of the present invention;

3 is a longitudinal cross-sectional view of the vibration sensor shown in FIG. And

Figure 4 is a longitudinal cross-sectional view showing a completed state of the vibration sensor shown in FIG.

<Description of the code | symbol about the principal part of drawing>

50: sleeve 52: seating portion

54: shaft portion 54a: outwardly stepped jaw

60: vibration sensing member 70: disk spring

72: hemisphere groove 72a: slope

80: stop ring 82: incision

Best Mode for Carrying Out the Invention

An embodiment of the present invention will be described with reference to the accompanying drawings as follows, the accompanying Figure 2 is an exploded perspective view of the vibration sensor according to an embodiment of the present invention, Figure 3 is a vibration sensor of Figure 2 4 is a longitudinal cross-sectional view showing a completed state of the vibration sensor shown in FIG.

2, the vibration sensor according to an embodiment of the present invention is a sleeve 50 as shown; Vibration sensing member 60; Disk spring 70; Stop ring 80 and; It includes; inner diameter expansion means for expanding the inner diameter (d) of the stop ring (80). At this time, the vibration sensing member 60, the disk spring 70 and the stop ring 80 is sequentially fixed to the sleeve 50 as shown. The following describes these components in more detail.

First, the sleeve 50 described above has a plate-like seating portion 52 and a shaft portion 54 formed identically on the seating portion 52 as shown. That is, the sleeve 50 is formed in one piece. The seating portion 52 of the sleeve 50 is formed in a plate shape as shown, and is seated on a vibration generating component such as an engine of a vehicle not shown. And, as shown in the shaft portion 54 of the sleeve 50, the hollow (H) is formed, the upper end jaw 54a is formed in the upper end. At this time, the outward stepped jaw 54a is preferably formed by cutting inward the outer circumferential surface except for the end of the shaft portion 54. In other words, the outward stepped portion 54a is an end portion of the shaft portion 54 which is not cut.

Here, the bolt (not shown) penetrates the hollow H of the shaft portion 54 described above. This bolt is fastened to the vibration generating part not shown in the state passing through the hollow (H). At this time, the head of the bolt is fixed to the upper end of the shaft portion (54). Thus, the sleeve 50 is fixed to the vibration generating part by bolts.

On the other hand, the seating portion 52 of the sleeve 50 is formed with a step S as shown below. This step S not only prevents separation of the mold cover MC, which will be described later, but also guides the mold cover MC to the lower portion of the seating portion 52. This will be described later.

Next, the vibration sensing member 60 described above is formed in an annular shape as shown, and is fitted to the shaft portion 54 of the sleeve 50. The vibration sensing member 60 preferably applies a piezoelectric ceramic for converting vibration into voltage. At this time, the terminal disk 62 as shown in the both sides of the vibration sensing member 60 is disposed to apply the voltage generated from the vibration sensing member 60 to the outside. At this time, the terminal disk 62 is formed in an annular shape, as shown in the shaft portion 54 of the sleeve 50 is disposed on both sides of the vibration sensing member (60). Of course, the voltage applied to the outside through the terminal disk 62 is applied to the ECU or a separate calculation unit of the vehicle not shown.

On the other hand, the shaft portion 54 of the sleeve 50 may be fitted with an annular weight (W) as shown. This weight (W) is fitted to the shaft portion 54 to press the vibration sensing member (60).

On the other hand, the shaft portion 54 of the sleeve 50 may be fitted with an annular insulating disk ID as shown formed of an insulating material. The insulating disk ID is fitted to the shaft portion 54 to insulate the terminal disk 62 described above. That is, the insulating disk ID is located between the seating portion 52 and the terminal disk 62 of the sleeve 50 and between the insulating disk 62 and the weight W on the vibration sensing member 60 as shown. Each is interposed. Thus, the terminal disk 62 is insulated.

In addition, the shaft portion 54 of the sleeve 50 may be fitted with a cylindrical insulating tube (IS) as shown formed of a soft insulating material having an elastic force. The insulator tube IS has an inner diameter equal to the outer diameter of the shaft portion 54 of the sleeve 50 as shown. The insulator tube IS has a cutout portion CT cut in an axial direction on one side thereof. Therefore, the insulating tube IS is fitted to the shaft portion 54 of the sleeve 50 while being opened by the cutout portion CT. That is, the insulator tube IS is fitted to the shaft portion 54 while being opened by the cutout portion CT even when the outward stepped portion 54a is formed at the upper end of the shaft portion 54.

Subsequently, the above-described disk spring 70 is fitted to the shaft portion 54 of the sleeve 50 and shown on the weight W as shown. Therefore, the disk spring 70 is connected to the vibration sensing member 60 through the weight (W).

The stop ring 80 described above is then fitted to the shaft portion 54 of the sleeve 50 and placed on the disc spring 70 as shown. At this time, the stop ring 80 is formed in an annular shape as shown, and has an inner diameter (d) formed larger than the inner diameter of the disk spring 70 while corresponding to the outer diameter of the shaft portion (54). The stop ring 80 is extended by the inner diameter (d) as necessary by the inner diameter expansion means described above. Of course, the stop ring 80 is circularly restored by its own rigidity after the inner diameter d is expanded.

Here, the above-described inner diameter expansion means may be configured to form a cutout 82 cut in a portion of the stop ring 80 as shown, for example, so that the stop ring 80 may be opened in the circumferential direction. That is, the stop ring 80 may be opened in the circumferential direction by the cutout 82 as in a general snap ring.

On the other hand, the above-described stop ring 80 may be formed to have a circular cross-section as shown, unlike the illustrated may be formed to have a cross section of a square or triangle. However, the stop ring 80 is preferably formed to have a circular cross-section as shown to form a round on the outer peripheral surface.

On the other hand, the embodiment of the present invention may further include a mold cover (MC) as shown. The mold cover MC is molded on the outside of the vibration sensing member 60 and the above-described components after being fitted to the sleeve 50.

Referring to FIG. 3, the above-described insulating disk ID, terminal disk 62, vibration sensing member 60, weight W, and disk spring 70 may have shaft portions of the sleeve 50 as shown in their inner diameters. It is the same as the outer diameter of the outward stepped 54a formed in 54. As shown in FIG. In addition, the inner tube ID and the stop ring 80 have the same inner diameter as the outer diameter of the shaft portion 54 and are smaller than the outer diameter of the outward step 54a. Accordingly, the insulating disk ID, the terminal disk 62, the vibration sensing member 60, the weight W, and the disk spring 70 easily pass through the outward step 54a and then the shaft portion 54 as shown. Is fitted on. However, the insulator tube ID and the stop ring 80 are opened by the cutouts 82 and CT as described above, and are inserted into the shaft portion 54 after passing through the outward step 54a.

In conclusion, the insulating disk ID, the terminal disk 62, the vibration sensing member 60, the weight W and the disk spring 70, and the insulating tube ID and the stop ring 80 are all shaft portions 54. ) Of course, the vibration sensing member 60, the disk spring 70 and the stop ring 80 described above are aligned with the shaft portion 54 of the sleeve 50 as shown. In this case, the terminal disk 62 described above is in contact with both side surfaces of the vibration sensing member 60 as shown. In addition, the terminal disk 62 is insulated from the seating portion 52 and the weight W of the sleeve 50 by the insulating disk ID.

On the other hand, the stop ring 80 supports the disk spring 70 disposed on the weight (W) as shown. Thus, the disk spring 70 elastically supports the weight (W). Of course, the weight W pressurizes the vibration sensing member 60 more reliably by the elastic force of the disk spring 70.

This stop ring 80 is fitted to the shaft portion 54 of the sleeve 50 via a jig JG as shown. At this time, the jig (JG) is formed in a conical shape as shown so that the stop ring 80 is easily fitted to the shaft portion (54). Accordingly, the stop ring 80 is guided to the shaft portion 54 along the outer circumferential surface of the jig JG inclined while being pressed by the pressing device not shown.

At this time, the stop ring 80 is led to the shaft portion 54 while being opened by the above-described cutout 82. Then, the stop ring 80 passes through the outward stepped portion 54a of the shaft portion 54 in an open state, and is caught again by the lower surface of the outward stepped portion 54a. That is, the stop ring 80 is fixed to the lower surface of the outward step (54a) after passing through the outward step (54a). Accordingly, the stop ring 80 presses the disk spring 70 while being fixed to the shaft portion 54. Of course, the stop ring 80 presses the disk spring 70 in a state in which one side is supported by the outward step 54a.

In this way, the stop ring 80 for pressing the disk spring 70, as the cross section is formed as shown in the pressing force is transmitted in the same size in all directions. In more detail about this, the stop ring 80 has a radius r of the same length in all directions as shown enlarged in the upper right of the figure. Therefore, the pressing force transmitted from the stop ring 80 acts the same magnitude.

If the stop ring 80 is formed to have a rectangular or triangular cross section (not shown), the stop ring 80 has a different radius r. Accordingly, the pressing force transmitted from the stop ring 80 depends on the length of the radius (r). Therefore, the stop ring 80 is preferably formed in a circular cross section as shown.

Thus, when the stop ring 80 is formed in a circular cross-section, a portion of the above-described disk spring 70 in contact with the stop ring 80, hemispherical hemispherical groove 72 as shown enlarged below the upper end of the figure It is preferable to form Thus, when the hemisphere groove 72 is formed, the disk spring 70 is integral with the stop ring 80 while being matched to the stop ring 80. Therefore, the pressing force transmitted from the stop ring 80 is more reliably transmitted to the disk spring 70. Of course, the hemispherical groove 72 of the disk spring 70 is supported by the stop ring 80 to transfer the pressing force of the stop ring 80 to the disk spring 70, as well as to stop the elastic force of the disk spring 70 Transfer to the ring 80 to prevent the stop ring 80 from disengaging from the shaft portion 54 of the sleeve 50. That is, the stop ring 80 is firmly fixed to the outward end step 54a of the shaft portion 54 by the elastic force of the disk spring 70.

In addition, when the stop ring 80 is formed in a circular cross section, the outgoing step 54a described above in contact with the stop ring 80 has a hemispherical portion CP in contact with the stop ring 80 as shown. It is preferable to form. Accordingly, the outward step 54a is integral with the stop ring 80 while being matched with the stop ring 80. Thus, when the contact portion (CP) of the outwardly stepped jaw (54a) is formed in a hemispherical shape, the outwardly stepped step (54a) is matched with the stop ring 80 to support the stop ring 80 more reliably.

On the other hand, the insulator tube IS surrounds the shaft portion 54 of the sleeve 50 as shown. Thus, the vibration sensing member 60 and the terminal disk 62 fitted to the shaft portion 54 of the sleeve 50 are insulated from the shaft portion 54.

On the other hand, the lower end of the seating portion 52 is stepwise formed by the step S formed in the seating portion 52. The sleeve 50 has a locking groove G as shown in the seating portion 52 of the portion where the step S is formed. At this time, the locking groove (G) is parallel to the axial direction of the sleeve 50 as shown.

On the other hand, the outwardly stepped jaw 54a formed on the shaft portion 54 of the sleeve 50 may form a taper on the outer circumferential surface as shown in an enlarged upper left of the figure. In this way, when the taper is formed on the outward stepped portion 54a, the above-described jig JG for guiding the stop ring 80 to the shaft portion 54 can be omitted. That is, the stop ring 80 may be guided along the taper of the outwardly stepped jaw 54a.

In addition, the outward stepped portion 54a may form a cross section of the portion CP in contact with the stop ring 80 at a right angle, as shown in an enlarged manner. That is, the contact portion CP may be formed at an angle without forming a hemispherical shape as described above. However, the outward step 54a is preferably formed in a hemispherical shape as described above so that the stop ring 80 is matched.

Referring to FIG. 4, the above-described mold cover MC shields components aligned with the shaft portion 54 of the sleeve 50 and insulates them in an insulated state as shown. Therefore, the insulating disk ID, the vibration sensing member 60, the terminal disk 62, the weight W, the disk spring 70, and the stop ring 80 which are sequentially inserted into the shaft portion 54 of the sleeve 50. Is protected by the mold cover MC.

At this time, the mold cover MC is inserted into the locking groove (G) formed on the lower surface of the seating portion 52 through the step S formed in the seating portion 52 of the sleeve 50 as shown. . Therefore, the mold cover MC is fixed by being caught in the locking groove G.

Meanwhile, at least one locking groove G ′ forming a right angle with the shaft portion 54 of the sleeve 50 may be formed on the outer circumferential surface of the sleeve 50 in the outward step 54a. As such, when the locking groove G 'is formed in the outward stepped portion 54a, the mold cover MC is caught by inserting the upper end into the locking groove G'. Therefore, both ends of the mold cover MC are fixed to the sleeve 50. Of course, the locking groove G 'formed in the outwardly stepped jaw 54a of the sleeve 50 may be formed in the same direction as the locking groove G formed in the seating portion 52 of the sleeve 50. That is, the locking groove G 'formed in the shaft portion 54 may be formed in the same direction as the axial direction of the shaft portion 54.

On the other hand, the hemisphere groove 72 of the above-described disk spring 70 can be replaced by the inclined surface 72a as shown in enlargement. That is, the disk spring 70 may be formed on the inner peripheral surface of the inclined surface 72a as shown instead of the above-described hemisphere groove 72. As such, when the inclined surface 72a is formed on the disk spring 70, the inner circumferential surface of the disk spring 70, that is, the portion in contact with the stop ring 80 is inclined to the stop ring 80.

As such, when the inclined surface 72a is formed on the inner circumferential surface of the disk spring 70 instead of the above-described hemisphere groove 72, the disk spring 70 may be more easily manufactured. That is, the above-described hemisphere groove 72 of the disk spring 70 is more difficult to manufacture than the inclined surface 72a as shown. Therefore, the disk spring 70 is more easily manufactured by the inclined surface 72a.

Referring to Figure 4 attached to the operation of the vibration sensor according to an embodiment of the present invention configured as described above are as follows.

As shown, the vibration sensing member 60 shielded by the mold cover MC is fixed on the vibration generating part by a bolt (not shown) which passes through the shaft portion 52 of the sleeve 50 and is fastened to the vibration generating part. do. That is, the vibration sensing member 60 is connected to the vibration generating part through the sleeve 50 fixed to the vibration generating part. At this time, the seating portion 52 of the sleeve 50 is in direct contact with the vibration generating part. Accordingly, the vibration generated from the vibration generating component is transmitted to the vibration sensing member 60 through the mounting portion 52. Therefore, the vibration sensing member 60 generates a voltage while shaking by vibration generated from the vibration generating part. The generated voltage is transmitted to the ECU of the vehicle (not shown) or the computing unit separately provided through the terminal disk 62.

On the other hand, the disk spring 70 elastically supports the vibration sensing member 60 by pressing the weight (W). At this time, the stop ring 80 presses the disk spring 70 in a state supported by the outward step 54a formed in the shaft portion 54 of the sleeve 50. Accordingly, the disk spring 70 presses the weight W in a state of being fixed to the shaft portion 54.

Here, the above-mentioned stop ring 80 is firmly supported while being matched to the outward stepped 54a as the lower portion of the outward stepped 54a is formed in a hemispherical shape. And, as the stop ring 80 is formed in a circular cross section, more pressing force is transmitted to the disk spring 70. In addition, the stop ring 80 is one side outer circumferential surface is fitted into the hemisphere groove 72 of the disk spring 70, or pressurizes and supports the inclined surface 72a of the disk spring 70, it is stable to the disk spring 70 In addition to being connected, the pressing force is transmitted to the disk spring 70 more reliably.

On the other hand, the insulating disk ID and the insulating tube IS insulate the components fitted to the shaft portion 54. That is, the terminal disk 62, the vibration sensing member 60 and the weight W are insulated by the insulating disk ID and the insulating tube IS. In addition, the terminal disk 62, the vibration sensing member 60 and the weight (W) is wrapped in the mold cover (MC) together with the disk spring 70 and the stop ring (80). Accordingly, the terminal disk 62, the vibration sensing member 60, the weight W, the disk spring 70 and the stop ring 80 are not only protected from the outside but also insulated by the mold cover MC. The mold cover MC is firmly fixed to the sleeve 50 as both ends thereof are fixed by being caught by the locking grooves G and G 'of the sleeve 50.

In the vibration sensor according to the present invention as described above, the shaft portion and the seating portion of the sleeve can be formed in a single body to easily manufacture the sleeve, and can omit the assembly process required for the manufacture of the sleeve. Therefore, the vibration sensor according to the present invention has the effect of shortening the manufacturing time of the sleeve.

In addition, the vibration sensor according to the present invention is fixed to the shaft portion by the stop ring that the disk spring for elastically supporting the vibration sensing member to the shaft portion of the sleeve, so that even if the sleeve is formed in a single body, the vibration sensing member and the disk spring on the shaft portion It can also be installed.

In addition, since the stop ring is extended by the incision, it is fitted to the shaft, so that the stop ring can be easily installed on the shaft, and the stop ring is formed in a circular cross section, so that the disk spring can be rigidly supported.

In addition, the outward stepped portion of the shaft portion for fixing the stop ring to the shaft portion is formed in a hemispherical cross section corresponding to the shape of the stop ring, so that the stop ring can be stably fixed to the shaft portion.

In addition, since the hemispherical groove or the inclined surface is formed in the disk spring, the stop ring having a circular cross section not only stably supports the disk spring but also has the effect of more reliably transmitting the pressing force.

Since the above embodiments are merely illustrative of preferred embodiments of the present invention, the scope of application of the present invention is not limited to the above, and appropriate modifications are possible within the scope of the same idea. Therefore, since the shape and structure of each component shown in the embodiment of the present invention can be carried out by deformation, it is natural that the modification of the shape and structure belong to the appended claims of the present invention.

Claims (6)

In the vibration detecting sensor mounted on the vibration generating parts that generate vibration by the fastening member, A plate-like seating portion 52 seated on the vibration generating part, and a shaft portion 54 formed in the same body on the seating portion 52 and having an outwardly stepped jaw 54a at its end; A sleeve 50 integrally fixed on the vibration generating part; A vibration sensing member (60) fitted to the shaft portion (54) of the sleeve (50) to sense vibration on the seating portion (52) of the sleeve (50) and apply the sensed vibration as a voltage signal; A disk spring 70 which elastically supports the vibration sensing member 60; It has an inner diameter d that is larger than the inner diameter of the disk spring 70 and corresponds to the outer diameter of the shaft portion 54 of the sleeve 50. The inner diameter d causes the outward step 54a of the shaft portion 54. The stop ring for holding the disk spring 70 while being fixed to the outwardly stepped portion 54a in a state of being fitted into the shaft portion 54 by being press-fitted through 80); And An inner diameter expanding means for expanding the inner diameter d of the stop ring 80 such that the stop ring 80 penetrates the outward step 54a formed in the shaft portion 54 of the sleeve 50. , The stop ring 80, Vibration sensor, characterized in that it has a circular cross-section so that the pressing force for pressing the disk spring (70) acts the same size in all directions. delete The outward step 54a of claim 1, wherein Vibration detection sensor, characterized in that the stop ring 80 has a hemispherical cross section corresponding to the outer circumferential surface of the stop ring (80) so that the stop ring (80) is fixed to the registration state. The method of claim 1, wherein the disk spring 70, Vibration detection sensor, characterized in that the hemispherical hemispherical groove 72 corresponding to the outer circumferential surface of the stop ring (80) is formed in a portion in contact with the stop ring (80) to match the outer circumferential surface of the stop ring (80). The method of claim 1, wherein the disk spring 70, Vibration detection sensor, characterized in that the inclined surface (72a) on the inner circumferential surface so that the portion in contact with the stop ring 80 is inclined to the stop ring (80). The said inner diameter expansion means in any one of Claims 1 thru | or 3, The Vibration detection sensor, characterized in that the stop ring (80) by forming a cut portion 82 is cut in part, so that the stop ring (80) is opened in the circumferential direction.

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