JPH08145818A - Washer die load sensor device - Google Patents

Abstract

(57) [Summary] [Purpose] To reduce the diameter of the washer-type load sensor body and enable large load measurement. [Structure] A washer load sensor 1 includes a washer load sensor main body 2 formed of a piezoelectric element and a disc spring 3. The disc spring 3 has a bent portion 3b and is formed in a dogleg shape in one cross section. The disc spring 3 holds the washer load sensor main body 2 between the upper surface of the inner peripheral edge portion 3a and the flange portion 4a of the pedestal 4, and the outer peripheral edge portion. The part is in contact with the holding plate 5. And the flange portion 4a and the holding plate 5
And are in contact with the lower mounting plate 21 of the engine mount,
The bent portion 3b is arranged so as to come into contact with the vehicle body side bracket 30. Since the force A input to the bent portion 3b is divided into the force B on the outer peripheral edge portion 3c side and the force C on the inner peripheral edge portion 3a side, the washer load sensor main body 2 can have a small diameter. Further, when an excessive force is applied, the lower end of the collar portion 4b of the pedestal comes into contact with the vehicle body side bracket 30 and serves as a stopper, and the load is directly released to the engine mount 20, so that the washer load sensor main body 2 is protected. .

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a washer load sensor device.

[0002]

2. Description of the Related Art As a conventional washer type load sensor device,
For example, there is one as shown in JP-A-59-141028. FIG. 5 (a) is an external perspective view of this conventional washer load sensor device, and FIG. 5 (b) shows its sectional structure. That is, the washer load sensor 100 has the through hole 110.
The electrode plate 102 is formed in a ring shape and has a ring-shaped metal plate, and ring-shaped piezoelectric elements 103 and 104 that are closely laminated on both surfaces of the electrode plate 102. A pair of ring-shaped metal pressure receiving portions 105 and 106 are arranged above and below with the electrode plate 102 and the piezoelectric elements 103 and 104 interposed therebetween. The ring-shaped metal pressure receiving portions 105 and 106 are the upper pressure receiving portion 1
The tip portions 107a and 108a of the joint portions 107 and 108 extending downward from the outer peripheral edge and the inner peripheral edge of 05 are welded to the lower pressure receiving portion 106 to be integrated. A lead-out terminal 101 is provided on the outer periphery of the electrode plate 102 so as to project therefrom.

The electrode plate 102 and the piezoelectric element 10 are also provided.
An insulating tube 109 is interposed between the inner circumferences of the members 3 and 104 and the inner joint portion 108, so that the electrode plate 102 and the pressure receiving portions 105 and 106 are insulated from each other. The piezoelectric elements 103 and 104 are piezoelectric ceramics, and their polarization directions are opposed to each other so that charges of the same polarity are generated on the contact surface with the electrode plate 102. Therefore,
When pressure is applied to the pressure receiving portions 105 and 106 from the outside, the pressure is transmitted to the piezoelectric elements 103 and 104 to generate a charge output, and this output is led to the outside via the electrode plate 102.

The pressure applied to the pressure receiving portions 105 and 106 is applied to the piezoelectric elements 103 and 104 as well as to the joint portions 107 and 108.
Since the thickness of 8 is relatively thin, elastic compression and bending are large, and most of the pressure is applied to the piezoelectric element. As shown in FIG. 5C, the piezoelectric load sensor 100 includes a cylinder head 121, a cylinder block 12 and a cylinder head 121 in a cylinder portion of an automobile engine.
2 to the tightening part of the head bolt 123 for attaching to
Head bolt 123 is inserted into hole 110 in the same manner as a normal washer.
It is tightened and fixed through. Then, the change in the tightening pressure caused by the combustion of the gas is taken out as a sensor output as shown in FIG. 5D, which is used to detect a specific cylinder internal pressure.

[0005]

However, in such a conventional washer-type load sensor device, since the structure is such that the piezoelectric element alone receives most of the load.
For example, as shown in FIG. 5E, when the load applied to the engine mount 133 interposed between the mounting portion 131 on the engine 130 side and the mounting portion 132 on the vehicle body side is measured, the load is large. There is a problem in that a large piezoelectric element, which is expensive, must be used when measuring the load at a portion having a large mounting area.

That is, generally, when the washer load sensor is used for measuring the load of the engine mount, the washer load sensor is fastened to the engine mount together with the mounting bolts of the engine mount. Therefore, the washer load sensor must consider the set maximum load applied to the engine mount in addition to the axial force when tightening the mounting bolt.
Therefore, it is necessary to increase the size of the washer load sensor to deal with it, which causes a cost increase. The present invention has been made by paying attention to such a conventional problem, and provides a washer-type load sensor device that makes it possible to reduce the diameter of a piezoelectric element and measure a large force applied to a large area. With the goal.

[0007]

For this reason, the present invention is a washer-type load sensor device installed between first and second holding members arranged in the axial direction. The washer load sensor main body having a first through hole in the center portion for outputting, the inner peripheral edge portion having a second through hole having the same diameter as the first through hole, and contacting the washer load sensor main body. A plate that is projectingly formed so as to come into contact, an outer peripheral edge portion is projectingly formed so as to contact the first sandwiching member, and an intermediate position between the inner peripheral edge portion and the outer peripheral edge portion is projectingly formed so as to contact the second sandwiching member. And a connecting member that connects the first and second holding members through the first and second through holes.

The washer-type load sensor main body and the plate-shaped spring member may be provided with a pedestal having an outer diameter matching the through holes thereof, and the connecting member may pass through the pedestal. In particular, when the plate-shaped spring member is bent to a predetermined limit, both ends of the pedestal may be set to a length such that both ends contact the first and second holding members and function as stoppers. Further, it is preferable that the plate-shaped spring member is formed into a dogleg shape in one cross section. Further, a holding plate is provided on the first clamp member side of the washer-type load sensor main body, and an outer peripheral edge portion of the plate-shaped spring member is in contact with the first clamp member via the retainer plate. Good.

Further, the first holding member is either one of the actuator of the active engine mount body equipped with an actuator and mounted on the engine side, or the flange portion of the mounting base mounted on the vehicle body side, and the second holding member is provided. The member can be the other of the actuator or the flange portion of the mounting base. And
The actuator and the flange portion of the mounting base may be housed in the actuator case, and the washer load sensor main body and the plate-shaped spring member may be housed in the actuator case as well.

[0010]

The force transmitted from the first holding member to the second holding member is divided into a force passing through the inner peripheral edge portion and a force passing through the outer peripheral edge portion in the plate-shaped spring member. Since the force passing through the inner peripheral edge portion having a small diameter is applied to the washer load sensor main body, the diameter can be reduced.

By inserting a pedestal having an outer diameter matching the through holes of the washer-type load sensor main body and the plate-shaped spring member, both ends of the plate-shaped spring member when the plate-shaped spring member is bent to a predetermined limit. When the length is set such that it contacts the first and second clamping members and functions as a stopper, the washer load sensor main body is protected and is not damaged even if an excessive load is applied. Further, when the holding plate is provided on the first clamping member side of the washer load sensor main body, the connector of the output cable from the washer load sensor main body can be supported by the extension portion of the holding plate.

Further, by disposing the washer load sensor having the above structure between the actuator of the active engine mount body and the flange portion of the mounting base mounted on the vehicle body side, it can be compactly incorporated into the engine mount. By accommodating the actuator, the flange portion of the mounting base, and the washer load sensor in the actuator case, they are integrated with the engine mount, and the overall size is reduced.

[0013]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to the drawings. FIG. 1 shows a structure of a washer load sensor according to a first embodiment of the present invention. Particularly, FIG. 1A is a longitudinal sectional view, and FIG.
Is a bottom view and (c) is a partially enlarged view. In the washer load sensor 1, a small-diameter washer load sensor main body 2 composed of a small piezoelectric element is a disc spring 3 that is a plate-shaped spring member.
Upper surface of the inner peripheral edge portion 3a and the upper flange portion 4 of the pedestal 4
It is sandwiched and held between a and. The washer load sensor main body 2 outputs an electric signal according to the load received from the disc spring 3. The disc spring 3 has a bent portion 3b and is formed in a dogleg shape in one cross section. The bent portion 3b is the bottom of the load sensor 1 and receives a load from below. The outer peripheral edge portion 3c of the disc spring 3 abuts on the holding plate 5, and the space formed by the disc spring 3 and the holding plate 5 is filled with a soft rubber-based sealing material 6 so that each component is It is loosely fixed and waterproof.

The base 4 has a flange portion 4a and a collar portion 4b.
And a mounting hole 4c is formed in the center. Pedestal 4
The collar portion 4b of each of the through holes 2a, 3 having outer diameters formed in the central portions of the washer load sensor main body 2 and the disc spring 3 has an outer diameter.
It is formed to be substantially equal to the inner diameter of d, and determines the central axes of the washer load sensor main body 2 and the disc spring 3. Figure 1 (c)
As shown in, in the free state in which the pedestal 4, the washer load sensor main body 2 and the disc spring 3 are stacked, between the plane contacting the lower surface of the bent portion 3b of the disc spring 3 and the lower end of the collar portion 4b. A gap S is provided. Then, when the deflection of the disc spring 3 increases due to an excessive load, the gap S decreases, and finally the lower end of the collar portion 4b and the plane contacting the lower surface of the bent portion 3b become flush with each other. As a result, the collar portion comes into contact with the vehicle body or the like that forms the above-mentioned plane and acts as a stopper to protect the washer load sensor main body 2.

A shoulder portion is formed on the periphery of the flange portion 4a of the pedestal, and a holding plate 5 having a hollow disc portion is placed on the shoulder portion, and the upper surface of the disc portion and the upper surface of the flange portion 4a are placed. And are flush with each other. The holding plate 5 is the disc portion 5
The output cable 7 has an extension 5b extending outwardly from a, and the terminal terminal 8 of the output cable 7 extending from the washer-type load sensor main body 2 is held by a connector 9 attached to the tip of the extension 5b.

Next, the operation will be described. FIG. 2 shows an assembled state when the washer load sensor 1 is used to measure a load applied to an engine mount of a vehicle. The washer load sensor 1 includes a stud bolt 22 as a connecting member mounted on a lower mounting plate 21 of an engine mount 20.
Is penetrated through the mounting hole 4c of the pedestal, then passed through the mounting hole of the vehicle body side bracket 30, and fixed by tightening the nut 23. Stud bolt 22 and nut 2
A detent (not shown) such as a split pin is provided between the three. Here, the lower mounting plate 21 of the engine mount 20 corresponds to the first holding member, and the vehicle body side bracket 30 corresponds to the second holding member. Also, the through hole 2
a and 3d respectively constitute the first and second through holes of the invention.

Next, the transmission of force in this example of use will be described. In FIG. 2, a force A transmitted from the vehicle body side bracket 30 through the bent portion 3b of the disc spring 3 is a force B transmitted from the outer peripheral edge portion 3c of the disc spring 3 to the holding plate 5.
And the washer load sensor main body 2 from the inner peripheral edge portion 3a of the disc spring.
It is divided into 2 and the force C transmitted to. Then, the force C transmitted to the small-diameter washer load sensor main body 2 is received by the flange portion 4a that is in contact with the lower mounting plate 21 of the engine mount 20 of the pedestal 4. In this way, the force C transmitted to the flange portion 4a and the force B transmitted to the holding plate 5 are transmitted to the lower mounting plate 21 of the engine mount.

As described above, the disc spring 3 having the bent portion 3b, the outer peripheral edge portion 3c, and the inner peripheral edge portion 3a, which has a dogleg-shaped cross section, applies the force A input to the bent portion 3b to the outer peripheral edge portion. 3c
Side force B and inner peripheral edge 3a side force C, and
Since the partial pressure ratio of the forces B and C is known based on the distance between the contact points of the bent portion 3b, the outer peripheral edge portion 3c, and the inner peripheral edge portion 3a,
Only the force C applied to the inner peripheral edge portion 3a is applied to the washer load sensor main body 2
It is possible to know the force A applied to the whole by measuring with. In the prototype example of the present application, the force C is about 3 of A.
It was possible to divide the pressure by a factor of one.

Further, since the disc spring 3 has a dogleg-shaped cross section, the rigidity can be increased more than that of the flat plate, so that it can withstand a larger load and the position where the force is received is projected. The position where the load is applied is clear and the partial pressure ratio does not change. Further, when an excessive force is applied to the washer load sensor 1, the lower end of the collar portion 4b of the pedestal 4 comes into contact with the vehicle body side bracket 30 to serve as a stopper, and the load is directly released to the engine mount 20. Even if the load sensor main body 2 has a small diameter and a small size, it is not destroyed. Further, even when the tightening force of the nut 23 becomes excessive, the collar portion 4b shares the load, so that the washer die load sensor main body 2 having a small diameter is not destroyed.

FIG. 3 shows a second embodiment of the present invention. In this embodiment, a washer load sensor 1'is assembled to a liquid-filled active engine mount equipped with an actuator. In the liquid-filled active engine mount 40, a main liquid chamber 47 and a sub-liquid chamber 48 are formed inside a hollow cone-shaped elastic support 43 of elastic rubber provided between an inner shell 41 and an outer shell 42. Has been done. Main liquid chamber 47
Is surrounded by the support elastic body 43 and the movable plate 50, and the working fluid is sealed inside. The sub liquid chamber 48 is surrounded by a diaphragm supported by the inner shell 41, and maintains the internal pressure at about atmospheric pressure. The main liquid chamber 47 and the sub liquid chamber 48 are the orifice 4
The hydraulic fluid flows through the orifice 49 to generate a damping force.

The movable plate 50 is supported by the outer shell 42 via a movable plate support spring rubber 53. The movable plate 50 is provided with an electromagnet 51 as an actuator which faces the movable plate 50 with an air gap of a predetermined length therebetween.
2 and a coil 53, which are fixed to the outer shell 42 by caulking. An upper mounting plate 44 having a stud bolt 45 is coupled to the inner shell 41 and mounted on an engine side mounting portion (not shown), and the electromagnet 51 side is mounted on a vehicle body side mounting portion.

In the liquid-filled active engine mount 40, when the vibration of the engine is applied, when the vibration has a relatively low frequency, the working fluid in the main fluid chamber 47 compressed by the support elastic body 43 passes through the orifice 49. Sub liquid chamber 48
Since it is absorbed without pressure, the hydraulic pressure of the hydraulic fluid in the main fluid chamber 47 does not change, and relatively good vibration absorption performance is exhibited.
When the vibration has a high frequency, the hydraulic fluid is not sufficiently moved, so that the hydraulic pressure within the main fluid chamber 47 may fluctuate and the vibration from the engine may be transmitted to the vehicle body.
Therefore, by applying a drive voltage to the electromagnet 51 so that the movable plate 50 moves in a phase opposite to that of the vibration, the main liquid chamber 4
The hydraulic fluid pressure of 7 is actively controlled so as to be kept constant to prevent transmission of engine vibration to the vehicle body. In addition, 54 is a conducting wire to the coil 53. The active engine mount body is constituted by a portion above the electromagnet 51 including the supporting elastic body 43, the main liquid chamber 47, the sub liquid chamber 48, the movable plate 50 and the yoke 52.

Here, as a means for detecting the above-mentioned vibration,
A washer load sensor 1'is attached to the active engine mount body. That is, the electromagnet 51
The bolt 52 is provided at the bottom of the yoke 52, and the stud bolt 62 of the mounting base 60 having the stud bolts 62 and 63 extending vertically from the flat flange 61 is screwed into the bottom of the yoke 52 and the flange. 6
A washer load sensor 1 ′ is mounted between the two. The washer load sensor 1 ′ does not include the holding plate 5 in the washer load sensor 1 of the first embodiment and uses a disc spring 3 ′ instead of the disc spring 3. Pedestal 4, washer load sensor body 2
Also, in the free state in which the disc springs 3'are stacked, the outer peripheral edge portion 3c 'of the disc springs 3'abuts on the lower surface of the yoke 52. The other configurations of the washer load sensor 1 ′ are the same as those of the washer load sensor 1 of the first embodiment.

Thus, the washer load sensor 1'is arranged between the yoke 52 of the electromagnet and the flange portion 61 of the mounting base, and the outer peripheral edge portion 3c 'of the disc spring 3'is provided on the lower surface of the yoke 52.
And the bent portion 3b of the disc spring 3 ′ is in contact with the upper surface of the flange portion 61. The active engine mount 40 is attached to the vehicle body side attachment portion (not shown) by the stud bolt 63. As described above, the washer load sensor 1'is arranged between the active engine mount body, especially the yoke 52 and the mounting base 60.

There are two types of force transmission paths in the liquid-filled active engine mount 40. That is, in the first path, the force associated with the elastic deformation of the support elastic body 43 is transmitted through the outer shell 42, and in the second path, the force associated with the elastic deformation of the support elastic body 43 is the hydraulic fluid in the main fluid chamber 47. It is transmitted to the movable plate 50 via. In this embodiment, the washer load sensor 1 ′ is arranged at a portion after the forces transmitted through the above two paths are overlapped with each other, that is, below the yoke 52 of the electromagnet 51 which is downstream of the mounting portion of the movable plate 50. The force due to the engine vibration is transmitted to the flange portion 61 of the mounting base via the stud bolt 62 and the washer load sensor 1 '. As a result, the load is shared by the stud bolt 62 and the washer load sensor 1 ', so that an excessive force is not applied to the washer load sensor 1', and the forces transmitted from the plurality of paths are accurately measured without deviation. The vibration of the engine can be accurately detected.

The present embodiment is constructed as described above, and the load transmitted from the outer shell 42 through the yoke 52 via the supporting elastic body 43 is measured by the washer load sensor 1 '.
Since the washer load sensor 1 ′ and the liquid-filled active engine mount 40 are integrated, it is not necessary to consider the axial force applied to the washer load sensor at the time of designing.
Since the load bearing condition becomes low, the size of the washer load sensor, especially the washer load sensor main body 2 for converting the load into an electric signal can be reduced, and the effect of reducing the space and cost is great.

Next, FIG. 4 shows a third embodiment of the present invention. In this embodiment, the washer load sensor 1 of the first embodiment is installed upside down in a liquid-filled type active engine mount, and the active engine mount 40 ′ is mounted inside the actuator case 65 as the washer load sensor 1. The electromagnet 51 'is housed integrally. That is, the force transmission ring 66 is provided along the inner wall of the actuator case 65 surrounding the electromagnet 51 ', the lower end of the force transmission ring 66 abuts the upper end of the yoke 52' of the electromagnet, and the upper end flange portion 66a of the force transmission ring. Is caulked to the outer shell 42 together with the upper end of the actuator case 65 and the movable plate supporting spring rubber 56. In the caulking portion, the elastic body 67 is interposed between the upper end flange portion 66a of the force transmission ring and the actuator case 65, and the spring constant when the force transmission ring 66 is elastically deformed is larger than the spring constant of the elastic body 67. Is set.

Similar to the previous embodiment, a bolt mounting hole 55 is provided at the bottom of the yoke 52 'of the electromagnet 51', and a stud bolt 6 extending vertically from a flat flange portion 61 is provided therein.
The stud bolt 62 of the mounting base 60 including the reference numerals 2 and 63 is screwed in, and the washer-type load sensor 1 is mounted between the yoke 52 ′ and the flange portion 61. In the washer load sensor 1, unlike the previous embodiment, the bent portion 3b of the disc spring 3 is in contact with the lower surface of the yoke 52 ', and the flange portion 4a of the pedestal 4 and the holding plate 5 are attached to the upper surface of the flange portion 61 of the mounting base. Disk portion 5a of the plate comes into contact with the outer peripheral edge portion 3c of the disc spring 3 and the holding plate 5
Is in contact with The mounting base 60 has its stud bolt 63 projected from a bolt hole provided on the bottom surface of the actuator case 65, and its flange portion 61 is seated on the bottom surface of the actuator case 65. The other overall configuration is the same as that of the previous embodiment.

Also in this embodiment, the portion after the forces transmitted through the above two paths are superposed, that is, the movable plate 50.
The washer load sensor 1 is arranged below the yoke 52 'of the electromagnet 51' downstream of the mounting portion of the force transmission ring 6
Since the spring constant of 6 when elastically deformed is set to be larger than the spring constant of the elastic body 67, most of the vibration transmission force is transmitted to the yoke 52 ', so that the force transmitted from these multiple paths is Accurate measurement can be performed without bias, and engine vibration can be accurately detected. In this embodiment, the engine mount is integrally incorporated as described above,
The overall size can be reduced, and the effect of reducing space and cost is great.

Further, the washer load sensor 1 and the electromagnet 51 'are integrally housed in the actuator case 65, and the stud bolt 62 of the mounting base 60 is projected from the bolt hole of the actuator case 65,
This has the effect of suppressing fluctuations from the central axis of the whole.

In each of the above-described embodiments, the disc spring having a dogleg-shaped cross-section has been described, but the cross-sectional shape may be any as long as the input force can be clearly divided. It is not limited to the dogleg shape. Also,
Although each embodiment shows an example applied to the engine mount,
The present invention is not limited to this, and can be applied to a tightening portion of an engine head bolt for use in measuring cylinder internal pressure, and can be used for various purposes.

[0032]

As described above, according to the present invention, in the washer load sensor installed between the two holding members, the first through hole is provided at the center of the washer load sensor main body, and the first through hole has the same diameter. A plate-shaped spring member having a second through hole is formed by protrusion so that its inner peripheral edge portion abuts the washer load sensor main body,
The outer peripheral edge portion abuts on the first sandwiching member, and the intermediate position between the inner peripheral edge portion and the outer peripheral edge portion abuts on the second sandwiching member, respectively, and is protruded and sandwiched through the first and second through holes. Since the members are connected to each other, there is an effect that a large load applied to a large area can be accurately measured while using a small-sized washer-type load sensor main body to form a small size and reduce cost.

Further, by inserting a pedestal that abuts against the sandwiching member when the plate-shaped spring member bends to a predetermined limit into the through hole of the washer-type load sensor main body and the plate-shaped spring member, an excessive load is received. Also, the effect that the washer load sensor main body is protected is obtained. Further, by providing the holding plate on the side of the first clamp member of the washer load sensor main body, the connector of the output cable from the washer load sensor main body can be supported by the extension portion of the holding plate.

Furthermore, by arranging between the actuator of the active engine mount body and the flange portion of the mounting base mounted on the vehicle body side, it can be compactly incorporated into the engine mount, and the actuator, the flange portion of the mounting base, and By storing the washer load sensor in the actuator case,
Since it is integrated with the engine mount, the overall size can be reduced.

[Brief description of drawings]

FIG. 1 is a diagram showing a first embodiment of the present invention.

FIG. 2 is a sectional view showing an assembled state of the engine mount of the first embodiment.

FIG. 3 is a sectional view showing a second embodiment.

FIG. 4 is a sectional view showing a third embodiment.

FIG. 5 is a diagram showing a conventional example.

[Explanation of symbols]

 1, 1'Washer die load sensor 2 Washer die load sensor main body 2a Through hole (first through hole) 3, 3'Disc spring (plate-shaped spring member) 3a Inner peripheral edge portion 3b Bent portion 3c, 3c 'Outer peripheral edge Part 3d through hole (second through hole) 4 pedestal 4a flange part 4b collar part 4c mounting hole 5 holding plate 5a disk part 5b extension part 6 sealing material 7 output cable 8 terminal terminal 9 connector 20 engine mount 21 lower mounting plate ( First pinching member) 22 Stud bolt (connecting member) 30 Body side bracket (second pinching member) 40, 40 'Active engine mount 41 Inner shell 42 Outer shell 43 Support elastic body 44 Upper mounting plate 45 Stud bolt 47 Main Liquid chamber 48 Sub-liquid chamber 49 Orifice 50 Movable plate 51, 51 'Electromagnet 52, 52' Yoke 53 Coil 54 Wire 55 Bolt mounting hole 56 Movable plate support spring rubber 60 Mounting base 61 Flange portion 62, 63 Stud bolt 65 Actuator case 66 Force transmission ring 66a Flange portion 100 Washer die load sensor 101 Draw-out terminal 102 Electrode plate 103, 104 Piezoelectric element 105, 106 Ring-shaped metal pressure receiving portion 107, 108 Joint portion 109 Insulating tube 110 Through hole 123 Head bolt 130 Engine 131, 132 Mounting portion 133 Engine mount

Claims (7)

[Claims] 1. A washer load sensor device installed between first and second holding members arranged in the axial direction, the method comprising:
A washer-type load sensor main body having a first through hole in the center portion, which outputs an electric signal according to a load, and an inner peripheral edge portion having a second through hole having the same diameter as the first through hole, It is formed so as to come into contact with the washer load sensor body,
A plate-shaped spring member having an outer peripheral edge portion projectingly formed so as to contact the first sandwiching member, and an intermediate position between the inner peripheral edge portion and the outer peripheral edge portion being projectingly formed so as to contact the second sandwiching member. And a connecting member that connects the first and second holding members through the first and second through holes, and a washer load sensor device. 2. A pedestal having an outer diameter that matches the through hole of the washer load sensor body and the plate-shaped spring member.
And a second through hole, and the connecting member penetrates the pedestal.
The washer load sensor device described. 3. The pedestal is set to have a length such that both ends of the pedestal come into contact with the first and second holding members when the plate-shaped spring member is bent to a predetermined limit and function as stoppers. The washer load sensor device according to claim 2. 4. The plate-shaped spring member is formed in a dogleg shape in one cross section.
Or the washer load sensor device described in 3. 5. A holding plate is provided on the side of the first holding member of the washer load sensor main body, and an outer peripheral edge portion of the plate-shaped spring member is attached to the first holding member via the holding plate. It is constituted so that it may contact | abut, Claim 1 characterized by the above-mentioned.
The washer-type load sensor device according to 2, 3, or 4. 6. The first holding member is one of the actuator of an active engine mount main body equipped with an actuator and mounted on the engine side, or the flange portion of a mounting base mounted on the vehicle body side, and the second The washer load sensor device according to claim 1, wherein the holding member is the other of the flange portion of the actuator or the mounting base. 7. The actuator and the flange portion of the mounting base are housed in an actuator case, and the washer-type load sensor main body and a plate-shaped spring member are housed in the actuator case. The washer load sensor device according to claim 6.