Vibration isolation mechanism, and method of assembling vibration isolation unit in vibration isolation mechanism

Abstract

[Problem] To provide a novel anti-vibration mechanism or the like that can exert excellent anti-vibration effects on exciting forces from three axial directions of X, Y, and Z even if the precise mass characteristics of an anti-vibration object, i.e., an anti-vibration body, are unknown. [Means for solving the problem] The anti-vibration mechanism of the present invention is characterized in that it includes: an anti-vibration body that supports an anti-vibration object; and an anti-vibration unit that is provided at a connecting portion of a vibration base and the anti-vibration body; an anti-vibration element body of the anti-vibration unit includes: an anti-vibration block that is made of a viscoelastic material; a fixed base that is fixed to the anti-vibration block and connected to the vibration base; and a support bracket that is fixed to the anti-vibration block and connected to the anti-vibration object; and the mounting method of the anti-vibration unit is such that at least three anti-vibration units are arranged obliquely so that the center axes of the anti-vibration blocks are concentrated on a center-of-gravity line that passes through the vertical direction of the center of gravity of the anti-vibration object.

Description

Technical Field

[0001] This invention relates to a vibration damping mechanism suitable for use in civil construction vehicles or similar vehicles equipped with precision measuring instruments in vibrating environments, and a method for assembling vibration damping units within the vibration damping mechanism. Background Technology

[0002] With the development of autonomous driving and unmanned construction sites in hazardous environments, 3D measurement technologies, such as LiDAR (Light Detection and Ranging), which utilize light-based 3D point sensing technology, have gradually become common applications. However, in some environments, such as those involving fractured rock formations, the vehicles may experience severe vibrations that could damage the measuring equipment. Even in such conditions, the demand for accurate 3D measurements while protecting the equipment from vibration has been growing in recent years. For example, there is a need to develop lightweight, compact, and easily assembled vibration-damping platforms (hysteresis-resistant platforms) that can be retrofitted onto existing civil engineering vehicles.

[0003] In addition, the following factors need to be considered when designing vibration damping platforms:

[0004] (1) For vibration frequency range input from three axes, reduce the natural frequency of the system (to achieve vibration prevention).

[0005] (2) The vibration-damping object (the object being vibration-damped) prepared by the client can be directly mounted or with minimal modifications;

[0006] (3) Even if the exact mass characteristics of the vibration-damping body are unclear, the vibration-damping performance can still be fully utilized;

[0007] In addition, depending on the usage environment, the following factors also need to be considered:

[0008] (4) It should be compact (especially the height should be as low as possible) so as not to obstruct light measurement;

[0009] (5) Few parts and easy to assemble;

[0010] (6) To prevent injury, protrusions should be eliminated as much as possible, and measures such as putting rubber protective caps on the ends (points) of bolts should be taken;

[0011] (7) Even if it is hit by flying stones, it can protect the vibration damping block formed by materials such as gel from damage;

[0012] In particular, the center of gravity, moment of inertia, and other mass characteristics of the object being vibrated are often not specified in advance. Therefore, a vibration damping mechanism is needed that will not produce unnecessary pitching or bouncing even if the center of gravity of the object being vibrated is higher than expected. In addition, the target resonant frequency in each axial direction is 20Hz or below. While maintaining a certain level of rigidity in the vertical direction to support the load, it is also necessary to design a vibration damping structure that will not exert unnecessary rigidity on the excitation force.

[0013] Previous technical documents

[0014] Patent documents

[0015] Patent Document 1: Japanese Utility Model Publication No. 53-96799

[0016] Patent Document 2: Japanese Utility Model Publication No. 55-132493 Summary of the Invention

[0017] The technical problem that the invention aims to solve

[0018] This invention was made with this background in mind, and its technical challenge lies in developing a vibration damping method that can meet the aforementioned conditions. In particular, it provides a vibration damping mechanism that can exert excellent vibration damping effect against excitation forces from the X, Y, and Z axes even when the precise mass characteristics of the object to be damped are unknown.

[0019] Technical solutions for solving technical problems

[0020] That is, the vibration damping mechanism described in Scheme 1,

[0021] For use in a vibrating substrate in a vibrating environment to reduce and avoid vibration in order to support the vibration-damped body, characterized in that:

[0022] The vibration damping mechanism has the following features:

[0023] The load-bearing vibration damper supports the weight of the vibration-damped object; and

[0024] Three or more vibration damping units are installed at the connection between the vibrating substrate and the vibration-damped body;

[0025] The vibration damping unit is composed of vibration damping elements;

[0026] The vibration damping element has the following structure:

[0027] The vibration damping blocks are made of viscoelastic material;

[0028] A fixed base is installed on the vibration damping block in a fixed state and has the function of connecting with the vibration base; and

[0029] A support bracket is fixedly installed on the vibration damping block and has the function of connecting with the body being vibration damped;

[0030] Furthermore, the installation method of the vibration damping unit is as follows: at least three vibration damping units are arranged at an angle so that the center lines of the vibration damping blocks are concentrated and point to the center line of gravity in the vertical direction passing through the center of gravity of the body being damped.

[0031] Furthermore, the vibration damping element is fixed in a state where the initial load of the vibration damping block is zero, with almost no load acting on the vibration damping body, in order to support the vibration damping body.

[0032] Furthermore, the vibration damping mechanism described in Scheme 2 is characterized by, based on the one described in Scheme 1,

[0033] In the installation method of the vibration damping unit, the convergence position of the axis of each vibration damping block is located on the center line in the vertical direction that passes through the center of gravity of the body being damped.

[0034] Furthermore, the vibration damping mechanism described in Scheme 3 is characterized by being based on the one described in Scheme 1.

[0035] In the installation method of the vibration damping unit, the convergence position of the axis of each vibration damping block is the center of gravity of the body being damped.

[0036] Furthermore, the vibration damping mechanism described in Scheme 4 is characterized by being based on the one described in Scheme 1.

[0037] The vibration damping unit consists of a semi-basin-shaped shell portion mounted on a fixed base or support bracket, with the vibration damping element itself housed within the shell portion.

[0038] Furthermore, the vibration damping mechanism described in Scheme 5 is characterized by being based on the one described in Scheme 1.

[0039] The vibration damping mechanism is composed of the following:

[0040] The vibration damping block in the vibration damping unit is composed of a pair of identical back-to-back combinations, and the two ends of the combined vibration damping block are fixed to the vibrating body by a fixing base;

[0041] On the other hand, a protruding support bracket is provided in the middle part of the back-to-back vibration damping blocks, and the support bracket is fixed to the vibration damped body.

[0042] In addition, the vibration damping mechanism described in Scheme 6

[0043] For use in a vibrating substrate in a vibrating environment to reduce and avoid vibration in order to support the vibration-damped body, characterized in that:

[0044] The vibration damping mechanism has the following features:

[0045] The load-bearing vibration damper supports the weight of the vibration-damped object; and

[0046] Three or more vibration damping units are installed at the connection between the vibrating substrate and the vibration-damped body;

[0047] The load-bearing vibration damper supports the vibration damped body from below;

[0048] Furthermore, the vibration damping unit includes:

[0049] A semi-basin-shaped shell portion is disposed on the vibrating base side; and

[0050] The vibration damping element is positioned within the housing portion in a freely adjustable location.

[0051] The vibration damping element is formed by fixing the two ends of the vibration damping block in the axial direction inside the housing, and supporting the vibration damped body in a support bracket that protrudes from the middle part in the axial direction.

[0052] Furthermore, when supporting the vibration-damped body, the load-bearing vibration-damping body supports the weight of the vibration-damped body, so that the vibration-damping block of the vibration-damping element supports the vibration-damped body in a state where the initial load is zero and the vibration-damping block is almost unaffected by the load of the vibration-damped body.

[0053] Furthermore, the vibration damping mechanism described in Scheme 7 is characterized by being based on the one described in Scheme 6.

[0054] The vibration-damped body is a three-dimensional laser measurement sensor.

[0055] Furthermore, the vibrating substrate is a self-propelled work vehicle, or a substrate directly mounted on the work vehicle.

[0056] In addition, the assembly method of the vibration damping unit in the vibration damping mechanism described in Scheme 8,

[0057] The vibration damping mechanism is used to reduce and avoid vibrations on a vibrating substrate in a vibrating environment, thereby supporting the vibration-damped body. Its characteristic is that:

[0058] The vibration damping mechanism using the method described above comprises: a load-bearing vibration damper and three or more vibration damping units, wherein the load-bearing vibration damper supports the weight of the vibration-damped body; the three or more vibration damping units are disposed at the connection between the vibrating base and the vibration-damped body; and the load-bearing vibration damper supports the vibration-damped body from below.

[0059] On the other hand, the vibration damping unit includes: a semi-basket-shaped shell part and a vibration damping element part, wherein the semi-basket-shaped shell part is disposed on the vibrating base; and the vibration damping element part is disposed in a freely adjustable position within the shell part.

[0060] The vibration damping element is formed by fixing the two ends of the vibration damping block in the axial direction inside the housing, and supporting the vibration damped body in a support bracket that protrudes from the middle part in the axial direction.

[0061] In addition, when the vibration damping unit is fixed to the body being protected, the load-bearing vibration damping body supports the weight of the body being protected, so that the vibration damping unit is fixed in a state where the initial load of the vibration damping block of the vibration damping element is almost zero and is not affected by the load of the body being protected.

[0062] Next, the configurations described in the above-mentioned schemes will be used as a means to achieve the solution of the above-mentioned technical problem.

[0063] Invention Effects

[0064] First, according to the inventions described in schemes 1, 2, 3, 6, and 8, because they possess a load-bearing vibration damper and a vibration damping unit, even in cases where the precise mass characteristics of the object being damped are unclear, or the excitation force is unclear, the natural frequency of the system comprising the vibration damping mechanism can be reduced across the range of vibration frequencies input from the three axes, thereby minimizing the resonance response factor. That is, for vibrations in the vertical direction, vibration damping can be achieved through the load-bearing vibration damper and the vibration damping unit, while for vibrations in other directions, vibration damping can be achieved through the vibration damping unit, thus achieving excellent vibration damping effect.

[0065] Furthermore, according to the invention described in the claims of this application, since the vibration damping element is set in an initial zero-load state, the load of the vibration damped body hardly acts on the vibration damping block, thus achieving excellent vibration damping effect over a wide range of vibration frequencies.

[0066] Furthermore, according to the invention described in Scheme 4 or 6, since the vibration damping element is housed within a semi-basket-shaped (semi-closed) shell, damage to the vibration damping element (vibration damping block) can be prevented even if flying rocks occur during rock drilling operations, for example.

[0067] Furthermore, according to the invention described in Scheme 5, the vibration damping mechanism can be compactly constructed, and in particular, its height can be minimized. Therefore, the applicability of the vibration damping mechanism can be improved for various devices (equipment) that experience vibration, and measurements can be performed without obstructing the laser beam.

[0068] Furthermore, according to the invention described in Scheme 7, in the configuration of installing a three-dimensional laser measurement sensor as the vibration-damped body on a self-propelled work vehicle (vibrating base) that is accompanied by vibration, the vibration transmitted from the vehicle to the three-dimensional laser measurement sensor can be suppressed as much as possible, thereby enabling precise three-dimensional measurement. Attached Figure Description

[0069] [ Figure 1(a) An explanatory diagram showing an example of a civil construction vehicle (excavator) equipped with a precision measuring device to which the vibration damping mechanism of the present invention is applied, and (b) A perspective view showing an example of a configuration in which a vibration damping unit and a vibration damping mechanism are provided at the connection between the vibrating substrate and the vibration-damped body (vibration-damped object).

[0070] [ Figure 2 (a) Plan view, and (b) Enlarged illustration of the vibration damping unit viewed from the side.

[0071] [ Figure 3 This shows an enlarged oblique view of the vibration damping mechanism.

[0072] [ Figure 4 (a) A schematic diagram showing the state in which the centerlines of at least three vibration damping units (vibration damping elements) are concentrated at the center of gravity of the vibration damped body, and (b) A schematic diagram showing the state in which the aforementioned centerlines are concentrated on the center of gravity line (an example).

[0073] [ Figure 5 (a) shows an explanatory diagram of a configuration in which a fixed base, support bracket, and vibration damper are covered by a box-shaped shell, and the vibration damper is suspended from the inside of the top of the shell by a suspension spring; and (b) shows an explanatory diagram of a configuration in which the vibration damper is flipped upside down in the same suspension state, that is, installed in an upside-down manner.

[0074] [ Figure 6 (a) shows the configuration of the vibration damping unit in the basic embodiment, that is, a shell portion is formed on the upper part of the fixed base fixed to the vibrating body side, and the vibration damping element is housed inside it. (b) shows a modified example in which a shell portion is formed on the lower part of the support bracket fixed to the vibrating body side, and the vibration damping element is housed inside it.

[0075] [ Figure 7 The diagram illustrates two variations when the vibration damping element is composed of a single vibration damping block. Detailed Implementation

[0076] The embodiments of the present invention are exemplified by the following embodiments, and also include various modifications based on the present technical concept.

[0077] Example

[0078] The following describes in detail the vibration damping mechanism 1, the vibration damping unit 5 used in the vibration damping mechanism, and the installation method of the vibration damping unit in the vibration damping mechanism.

[0079] First, as an example, such as Figures 1-3As shown, the vibration damping mechanism 1 is a mechanism for reducing and avoiding vibration of a vibrating base 2 in a vibrating environment, and for mounting a vibration-damped body 3 as the object of vibration damping. The vibration damping mechanism 1 includes: a load-bearing vibration damping body 4 to support the weight of the vibration-damped body 3; and three or more vibration damping units 5, which are disposed at the connection between the vibrating base 2 and the vibration-damped body 3.

[0080] The vibration damping unit 5 is composed of vibration damping element 6 (see...). Figure 2 (b) The vibration damping element 6 can suppress vibrations that may be transmitted from the vibrating base 2 to the vibration-damped body 3 as much as possible, for example, it is equipped with a vibration damping block 60 made of a viscoelastic material such as a gel material. Next, in order to place the vibration damping element 6 (vibration damping block 60) at the connection between the vibrating base 2 and the vibration-damped body 3, the vibration damping unit 5 is also equipped with a fixing base 7 and a support bracket 8. The fixing base 7 serves to install the vibration damping block 60 on the vibrating base 2 side, and the support bracket 8 serves to install the vibration damping block 60 on the vibration-damped body 3 side.

[0081] Furthermore, the installation method of the vibration damping unit 5 (vibration damping element 6) is, as an example, as follows: Figure 4 As shown, the centerlines L of at least three vibration damping elements 6 are arranged at an angle so that they converge to point to the centerline GH in the vertical direction passing through the center of gravity G of the vibration damped body 3.

[0082] The following is a detailed description of each component.

[0083] First, the vibration base 2 is a component that inevitably transmits vibration from the outside, or the vibration base 2 itself is a component that vibrates, such as a component that is fixedly configured to vibrate, a component that is directly mounted on the machine itself (e.g., excavator A) and vibrates, or a component that is subjected to vibration due to the working environment. Next, the vibration base 2 is provided with a vibration damping body 3 in a state that can attenuate and isolate vibration, and the vibration base 2 has a mounting base 21 in an appropriate position.

[0084] On the other hand, the vibration-damped body 3 can be, for example, a measuring device using light-based three-dimensional point cloud measurement technology, such as LiDAR. This measuring device is supported on a base plate 32 and includes a sensor probe 33 for measuring the structure being constructed (e.g., the cross-sectional state of rock strata during tunnel construction) (see...). Figure 1 (a) Next, in order to keep the vibration-damped body 3 away from the vibration environment, the vibration damping mechanism 1 of the present invention is adopted.

[0085] The vibration damping mechanism 1 first sets up a load-bearing vibration damper 4 between the vibrating base 2 and the body being damped 3, supporting the weight of the body being damped 3 and performing vibration damping in the load direction. The load-bearing vibration damper 4, as a substantial component for attenuating and insulating vibration, includes a vibration damping block 41, made of a suitable material such as rubber, a rubber block with an internal spring, or a block made of viscoelastic material. Of course, it is not limited to the same or different materials; various materials can be combined to obtain the vibration damping component, depending on the vibration damping conditions. Furthermore, the shape and size of the vibration damping block 41 can also be appropriately set according to the vibration damping conditions.

[0086] In this embodiment, as an example, such as Figure 1 As shown, the load-bearing vibration damper 4 adopts a frustum-shaped vibration damper block 41. The vibration damper block 41 is provided with fixing components at the top and bottom. Specifically, a fixing flange 42 is provided at the bottom (bottom side of the frustum-shaped block), and a top bolt 44 is provided at the top (top side of the frustum-shaped block) through a top washer 43, and a nut 45 is screwed into the top bolt 44 for fixing.

[0087] Furthermore, regarding the distinction between "up" and "down," the above explanation refers to the direction in which the vibrating substrate 2 is set as "down" and the direction in which the vibration-damped body 3 is set as "up." However, this is only a general description. Figures 1-3 For ease of distinction in the embodiment (basic configuration example), that is, in the actual installation method, the entire device including the vibrating base 2 and the vibration-damped body 3 can also be configured to be reversed vertically relative to the aforementioned basic configuration example (see [reference]). Figure 5 (b)).

[0088] Next, the load-bearing vibration damper 4 is appropriately fixedly mounted on the mounting base 21 of the vibrating base 2. As an example, since the base plate 32 of the vibration damper 3 is rectangular in plan view, the load-bearing vibration damper 4 is provided at four positions. In addition, when fixing the load-bearing vibration damper 4, it is fixed to the aforementioned mounting base 21 by suitable bolts and nuts on the fixing flange 42 side, and on the top bolt 44 side, the nut 45 is tightened to fix it (fixed by the top washer 43) at the bolt portion passing through the base plate 32 of the vibration damper 3.

[0089] In addition to the load-bearing vibration damper 4, as mentioned above, the vibration damping mechanism 1 of the present invention further includes a vibration damping unit 5 that performs vibration damping in the load direction and other directions. The vibration damping unit 5, as a component, includes a vibration damping element 6, which includes a vibration damping block 60 that substantially performs vibration damping. Furthermore, the vibration damping block 60 can be appropriately set to a known shape such as columnar, frustum-shaped, or barrel-shaped, depending on the vibration damping conditions. In this embodiment, the vibration damping block 60 is formed by combining the bottom surfaces (the side with the large circular surface) of vibration damping block pieces 60p formed in a frustum shape and having the same specifications (same shape, vibration damping characteristics, and material) back-to-back, so that the overall shape after back-to-back arrangement presents a shape that can be described as barrel-shaped (see [link]). Figure 2 (b) In this configuration where two vibration damping blocks 60 are combined back to back, each vibration damping block 60 is made of appropriate vibration damping components such as rubber, rubber blocks with built-in springs (i.e., erigo-type structures), or block materials made of viscoelastic materials, and is selected appropriately according to the vibration damping conditions.

[0090] Furthermore, each frustum-shaped vibration damping block 60p has a top end panel 61 on its top side (i.e., the side with the smaller circle in the frustum shape). On the other hand, a bottom end panel 62 is provided on its bottom side (i.e., the side with the larger circle in the frustum shape and back-to-back). The bottom end panel 62 is, for example, approximately elliptical or approximately rhomboid in plan view. In addition, double-ended bolts 61b are provided on the top end panel 61, protruding outward in the axial direction of the vibration damping block 60p. When observing the vibration damping blocks 60 configured in a back-to-back state, the double-ended bolts 61b are arranged to protrude obliquely upward and downward to both sides, and both are arranged on the same axis.

[0091] In addition, all exposed bolt heads, including the double-ended bolt 61b, are preferably provided with, for example, a rubber protective cap CA, in order to prevent the sharp ends of the bolts from being exposed.

[0092] Additionally, bolt holes 62h are provided on the bottom side end panels 62. Since the bottom side end panels 62 are elliptical or approximately rhomboid in plan view, the bolt holes 62h are located at two points at both ends of the long axis of the end panels, which are elongated in plan view. Furthermore, the symbols 62b and 62n in the figure represent bolts and nuts used to fix the bottom side end panels 62 to the block fixing portion 81 of the support bracket 8, respectively.

[0093] Such vibration damping blocks 60 are fixed to the mounting base 21 of the vibrating body 2 and the base plate 32 of the body being damped 3 via the fixed base 7 and the support bracket 8.

[0094] First, let me explain the fixing base 7 used to install the vibration damping block 60 on the side of the vibrating base 2.

[0095] For example, Figure 2 As shown in (b), the fixed base 7 includes: a lower block fixing portion 72; a base fixing portion 71 formed along the mounting base 21 of the vibrating base 2, which is continuous with the base fixing portion 71 and bent at a slightly acute angle to form an inclined shape; and an upper block fixing portion 73, which is on the upper part of the fixed base 7, is generally parallel to the lower block fixing portion 72 and maintains a certain distance therefrom, and can hold the vibration damping element 6 between them. These two block fixing portions (lower block fixing portion 72 and upper block fixing portion 73) are continuously formed by a connecting portion 74. In other words, the lower block fixing portion 72 and the upper block fixing portion 73 are formed at approximately 90 degrees relative to the connecting portion 74 and are bent towards each other. The lower block fixing portion 72, the connecting portion 74 and the upper block fixing portion 73 are formed in the shape of the Japanese character "コ" when viewed in cross-section. The vibration damping element 6 is arranged to be housed inside the "コ"-shaped space (the shell portion C described later).

[0096] More specifically, in this embodiment, the fixed base 7 is formed by using the same plate-shaped material with a certain width as the initial material for the base fixing part 71, the lower block fixing part 72, the connecting part 74, and the upper block fixing part 73, and is formed by bending the plate-shaped material (initial material) multiple times (i.e., so-called one-piece molding).

[0097] Furthermore, for installation purposes, this type of fixed base 7 first forms a base mounting groove 71s that is continuous along the center of the width direction on the base fixing part 71 (see...). Figure 1 The base mounting groove 71s is continuously formed with the same width and extends to the middle position of the lower block fixing part 72. The groove formed in the lower block fixing part 72 is called the lower block mounting groove 72s. That is, the base mounting groove 71s and the lower block mounting groove 72s are continuous grooves and are formed as an integral continuous groove in appearance.

[0098] Furthermore, the upper block fixing part 73 also has an upper block mounting groove 73s extending from the free end side (lower part) to the middle of the upper part within a certain range (see...). Figure 1 , Figure 3 ).

[0099] The vibration damping unit 5 (vibration damping element 6) is installed on this type of fixed base 7. During installation, with the double-headed bolts 61b formed by the upper and lower oblique protrusions of the vibration damping element 6 (vibration damping block 60) inserted into the lower block mounting groove 72s and the upper block mounting groove 73s, the vibration damping element 6 can be fixed on the fixed base 7 by tightening the nut 63.

[0100] Next, in this fixed state, the vibration damping block 60 of the vibration damping element 6 is arranged as described above, surrounded by the lower block fixing part 72, the upper block fixing part 73, and the connecting part 74. Furthermore, a side plate part 75 is provided to close the side edge of this surrounding space. Accordingly, the surrounding space is essentially formed as a semi-basin-shaped (semi-closed) shell with only a bottom opening, referred to here as shell part C. In addition, the bottom of shell part C is set in an open state, and the shell part C is formed in a semi-basin shape so that the support bracket 8 can pass through to the vibration damping body 3 using the opening, and the vibration damping block 60 inside the shell part C can be connected to the bottom plate 32 of the vibration damping body 3. Thus, in this embodiment, the vibration damping block 60 of the vibration damping element 6 is kept in a state of being housed within the shell part C formed by the fixed base 7, which is to prevent damage to the vibration damping element 6 (vibration damping block 60) caused by flying rocks during digging operations, for example.

[0101] In addition, in order to facilitate observation of the condition of the vibration damping block 60 stored in the housing C, the side plate 75 may be provided with an inspection cutout 75a, or the side plate 75 may be made of a transparent material.

[0102] Next, we will explain the support bracket 8 in the vibration damping unit 5 used to connect the vibration damping element 6 to the vibration-damped body 3.

[0103] The support bracket 8 is arranged back-to-back with the bottom sides (the large circular bottom surface in the truncated cone shape) of the vibration damping blocks 60. It includes: a block fixing part 81, which is clamped between the two bottom side end panels 62 provided on the bottom side; and a vibration damping body fixing part 82, which is bent in the shape of the Japanese character "く" when viewed in cross-section at the aforementioned location, to be fixed in accordance with the angle of the base plate 32 of the vibration damping body 3. Figure 2 (b) Figure 3 (Refer to). Specifically, the block fixing part 81 of the support bracket 8 is designed so that the bottom side panel 62 of each vibration damping block 60p of the vibration damping block 60 is elliptical or approximately rhomboid. The bolt holes 62h of the upper and lower side panels of the two bottom side panels 62 are staggered to maintain balance, and the bolts 62b and nuts 62n are fastened to a total of four elongated bolt holes 81h for fixing.

[0104] On the other hand, the vibration damping body fixing part 82 is fixed to the base plate 32 of the vibration damping body 3 by bolts 82b or the like. In addition, the bolt holes 82h of the vibration damping body fixing part 82 are preferably formed as elongated holes, thereby allowing the installation position of the vibration damping body fixing part 82 (support bracket 8) relative to the base plate 32 of the vibration damping body 3 to be appropriately adjusted.

[0105] In addition, in this embodiment, the central part of the block fixing part 81 of the support bracket 8 is preferably provided with a slit for temporary fixing (not shown in the figure) so as to make fine adjustments to the installation position of the vibration damping block 60 of the vibration damping element 6 described later, so that the final position can be accurately and reliably completed during installation.

[0106] The installation method of the vibration damping unit 5 (vibration damping element 6) is as follows: Figure 4 As shown, the vibration base 2 and the object being vibrated are connected in an inclined configuration so that the center lines L of at least three vibration damping elements 6 are aligned with the center line GH in the vertical direction passing through the center of gravity G of the object being vibrated 3. By tilting the vibration damping elements 6 of the vibration damping unit 5 as described above, vibration damping can be achieved against vibrations input in three directions, including the load direction and other directions. Furthermore, even if the mass characteristics such as the center of gravity position or moment of inertia of the object being vibrated 3 are not specified in advance, by adjusting the angle of the inclined configuration according to the center of gravity G of the object being vibrated 3, even if the center of gravity position is higher than expected, vibration damping can be achieved without unnecessary pitching or bouncing, and without causing excessive shear deformation of the load-bearing vibration damping body 4. In particular, by providing vibration damping units 5 at the four corners of the vibration damping mechanism 1, the amount of vibration damping material used to withstand the three-dimensional vibration force can be reduced, thereby facilitating assembly (improving assembly convenience).

[0107] The vibration damping mechanism 1 of the present invention has the above basic structure. By having the load-bearing vibration damping body 4 and the inclined vibration damping unit 5 work together, vibration in the load direction under the weight of the vibration damping body 3 can be damped by the load-bearing vibration damping body 4 and the vibration damping unit 5. For vibration in other directions, vibration damping unit 5 can dampen the vibration. Even when the precise mass characteristics of the vibration damping body 3 of the vibration damping object are unknown, or when the applied vibration force is unknown, the system consisting of the vibration damping mechanism 1 can reduce the natural vibration frequency and reduce the resonance response factor for vibration frequency range input from the three-axis direction, thereby achieving excellent vibration damping effect.

[0108] The following describes the assembly method of the vibration damping unit 5 used in the vibration damping mechanism 1 of the present invention.

[0109] Here, the vibration damping element 6 and the support bracket 8 are pre-installed with bolts and nuts, maintaining a temporary integrated assembly state. That is, the vibration damping element 6 is set back to back by vibration damping blocks 60p, and the block fixing part 81 of the support bracket 8 is set in a clamping state between the opposing vibration damping blocks 60p (bottom side panel 62).

[0110] (I-1) Installation of the vibration base 2 and the vibration-damped body 3 using the load-bearing vibration damper 4

[0111] First, the load-bearing vibration damper 4 is used to install the vibration damper 3 onto the vibration base 2. Here, the load-bearing vibration damper 4 utilizes the elasticity of the vibration damping block 41 to appropriately cushion and support the vibration damper 3 against the vibration base 2. Furthermore, this installation process itself involves attaching the fixing flange 42 to the vibration base 2 and then screwing appropriate bolts or the like into the internal threads formed on the mounting base 21 of the vibration base 2 for fixation.

[0112] On the other hand, the installation of the load-bearing vibration damper 4 and the vibration-damped body 3 is carried out by inserting the top bolt 44 of the load-bearing vibration damper 4 into the bolt hole 32h formed on the base plate 32 of the vibration-damped body 3, and then screwing in a nut 45 or the like into the top bolt 44 protruding from the base plate 32 to fix it (see...). Figure 6 (a)). In addition, the fixed position of the load damper 4 itself does not require special position setting. It can be fixed with bolts and nuts at the specified position. This tightened state can also be the final tightened state.

[0113] (I-2) Installation of vibration damping unit 5 (1) (Temporarily fix vibration damping element 6 to fixed base 7)

[0114] Next, the vibration damping unit 5 is installed on the vibration base 2 and the damped body 3, which are installed in an integrated state. First, the vibration damping element 6 is temporarily fixed to the fixed base 7 in a semi-fixed state. As described above, in the vibration damping blocks 60 of the vibration damping element 6, the block fixing part 81 of the support bracket 8 is clamped between each vibration damping block piece 60p (bottom side panel 62) to achieve temporary assembly. Next, the double-headed bolts 61b protruding downward (downward direction in the assembly state of the basic embodiment) in the vibration damping element 6 are inserted into the lower block mounting groove 72s of the lower block fixing part 72 of the fixed base 7, and the double-headed bolts 61b protruding upward (upward direction in the assembly state) in the vibration damping element 6 are inserted into the upper block mounting groove 73s of the upper block fixing part 73 of the fixed base 7. Appropriate nuts 63 are screwed into these two double-headed bolts 61b, so that the vibration damping element 6 is temporarily fixed to the fixed base 7 (see Figure 1 (b) Figure 3 ).

[0115] (I-3) Installation of vibration damping unit 5 (2)

[0116] The vibration damping element 6 is temporarily fixed to the vibration damping unit 5 on the fixed base 7. For example, four units can be set and fixed to the connection between the vibrating base 2 and the vibration damped body 3.

[0117] (i) The support bracket 8 is installed on the vibration-damped body 3

[0118] For example, the support bracket 8, which is integrated with the vibration damping element 6, is first installed on the vibration damped body 3.

[0119] At this time, since the vibration-damped body 3 has been suspended (floating) at a certain distance from the vibrating base 2 under the action of the load vibration-damped body 4, the vibration-damped body fixing part 82 of the support bracket 8 is contacted with the upper surface of the bottom plate 32 of the vibration-damped body 3 to set the position, so that the support bracket 8 is temporarily fixed to the vibration-damped body 3.

[0120] (ii) The fixed base 7 is installed on the vibrating base 2

[0121] Alternatively, when performing such operations, it is preferable to use the base mounting groove 71s of the fixed base 7 to temporarily fix the fixed base 7 to the vibrating base 2 with bolts and nuts, and then finally fix it after positioning and adjustment.

[0122] Furthermore, the operations in (i) and (ii) above can be reversed.

[0123] Through the above installation work (temporary fixing work), the vibration damping unit 5 is temporarily fixed at the connection between the vibrating base 2 and the vibration damped body 3.

[0124] (iii) Adjustment of vibration damping element 6 (position adjustment)

[0125] Subsequently, the vibration damping element 6 is adjusted (position adjustment). At this time, among the four tilted vibration damping elements 6 (double-headed bolts 61b), at least three of the axis lines L (e.g., L1, L2, L3, L4) are as follows: Figure 4 In one example shown in (a), the position (or orientation) of the vibration-damping element 6 is adjusted so that it is aligned with the center of gravity G of the vibration-damped body 3. Of course, the convergence point of the three axis lines L does not necessarily have to be exactly the same as the center of gravity G; they can also be concentrated at a point on the center of gravity line GH, which is the vertical line passing through the center of gravity G. Furthermore, even if the three axis lines L are not concentrated at the same point on the center of gravity line GH, as long as they are concentrated near a point on the center of gravity line GH (see, for example, [reference needed]), they can be aligned with the center of gravity G. Figure 4 (b) If the structure can fully exert its vibration damping function in practical application, then this configuration is also included in the present invention. Including the aforementioned configuration, it is collectively referred to in this specification as "(each axis line L) converging towards the center of gravity line GH". In addition, for example, among the above three axis lines L, there may be a situation where one or more of them do not strictly intersect with the center of gravity line GH (the so-called "misalignment position"). Even in this case, as long as the desired vibration absorption performance can be achieved, this situation is also included in the state of "(each axis line L) converging towards the center of gravity line GH".

[0126] (iv) Adjustment 2 of vibration damping element 6 (final adjustment)

[0127] Furthermore, from the viewpoint of achieving excellent vibration damping effect over a wider vibration frequency range, the vibration damping element 6 is finally fixed in a state where the load on the damped body 3 is almost negligible, i.e., in a state where the initial load is close to zero. In other words, the vibration damping block 60 is fixed while maintaining the state of the damped body 3, in a balanced floating state (static assembly state) that minimizes the load on the damped body 3. This state setting is essentially performed using various mounting slots such as the lower block mounting slot 72s and the upper block mounting slot 73s, which allow for free adjustment of the mounting positions of the vibration damping unit 5 and the vibration damping block 60 relative to the fixed base 7. In particular, after selecting the installation position of the vibration damping element 6 to perform the vibration damping function, and selecting a position that minimizes the load on the vibration damping body 3, the vibration damping element 6, the fixed base 7, and the support bracket 8 are finally fixed (tightened and secured) by using appropriate bolts and nuts, etc.

[0128] Furthermore, by fixing the vibration damping unit 5 with the initial load of the damped body 3 as close to zero as possible, vibration damping can be achieved over a wider range of vibration frequencies. Incidentally, the specific range within which the initial load is made as close to zero as possible is explained. Using the thickness of the vibration damping element 6 in the tensile / compressive deformation axis direction in the unloaded state as a reference value, the deformation during installation is within ±10%. In this design, this state is referred to as the "initial load zero state." Here, a positive (+) deformation indicates tensile deformation, and a negative (-) deformation indicates compressive deformation.

[0129] The vibration damping mechanism 1, as described above, even when the vibrating substrate 2 is in an extremely strong vibration environment, the load generated by the weight of the damped body 3 itself is borne by the load-bearing vibration damping body 4 in a buffering manner. The vibration components that cannot be fully borne by the load-bearing vibration damping body 4 are absorbed by the viscoelastic deformation of the vibration damping block 60 of the vibration damping unit 5, thereby suppressing the vibration generated in the damped body 3 as much as possible. In particular, since at least three of the axis lines L of the plurality of vibration damping elements 6 are configured to point towards the center of gravity G of the damped body 3, or the center of gravity line GH passing through the center of gravity G, the damped body 3 can be stably supported with excellent vibration insulation or vibration damping.

[0130] [Other Embodiments]

[0131] The present invention uses the above embodiments as a basic technical concept, but can be further modified as described below.

[0132] First, in the above basic embodiment, since the vibrating base 2 and the anti-vibration body 3 are rectangular in shape when viewed in a plane, anti-vibration units 5 are arranged at their four corners as the basic configuration. That is, in the basic embodiment, four anti-vibration units 5 are arranged, or in other words, four axis lines L are arranged as the basis. However, three or more anti-vibration units 5 are sufficient. This number can be more than five anti-vibration units 5 depending on the size, weight, or anti-vibration characteristics of the anti-vibration body 3. In addition, when there are four or more anti-vibration units 5, at least three of them need to have their axis lines L (i.e., the axis lines L of the anti-vibration element 6 (anti-vibration block 60)) arranged at an angle so that they are concentrated on the vertical axis line GH pointing towards the center of gravity G of the anti-vibration body 3. Furthermore, depending on the shape, center of gravity G, load balance, etc. of the anti-vibration body 3, different anti-vibration performance or tilt angles of the anti-vibration element 6 can be set for each anti-vibration unit 5.

[0133] Furthermore, in terms of overall form, in the above basic embodiment, when the anti-vibration body 3 is supported by the load-bearing vibration damper 4, the load-bearing vibration damper 4 is installed in a state where the anti-vibration body 3 is supported from below by the vibration base 2. However, for example, Figure 5 As shown in (a), the following method can also be used: the fixed base 7, the support bracket 8, and the vibration damper 3 are covered by a box-shaped shell B over the vibrating base 2, and a load-bearing vibration damper 4 is installed inside the top of the shell B, suspending the vibration damper 3 (so-called top-suspended type). In this case, the load-bearing vibration damper 4 can be in the form of a suspension spring.

[0134] In addition, even if it is also a hanging type, it can be like Figure 5 As shown in (b), the vibration damper 3 is installed by flipping it upside down in a so-called inverted suspension state.

[0135] Furthermore, as described above, when the vibrating substrate 2 is covered with a box-shaped shell B, and the vibration damper 3 or the like is housed within the shell B, it is also possible to... Figure 5 As shown in (b), a buffer material K with buffering properties is further provided between the vibrating base 2 and the shell B.

[0136] In addition, when the vibration damper 3 is installed in a static assembly state, it can replace the four load vibration dampers 4. The whole is composed of air springs, torsion bars, or leaf springs in the shape of flat barrels.

[0137] Furthermore, in the above basic embodiments, for example, Figure 6 As shown in (a), the upper part of the fixed base 7 (on the side of the vibration damper 3) is bent into a "ko" shape when viewed in cross-section, and the two sides are closed with the side plate part 75, thereby forming the shell part C, and the vibration damper 60 is housed in this shell part C. However, for example, as Figure 6As shown in (b), the lower part of the support bracket 8 (on the vibrating base 2 side) can also be bent into a "コ" shape when viewed in cross-section, forming the same housing part C as described above, and the vibration damping block 60 can be housed within this housing part C. That is, Figure 6 (b) is a configuration in which the shell part C and the support bracket 8 are integrally formed.

[0138] Furthermore, in the above basic embodiments, as described above... Figure 6 As shown in (a), the vibration damping block 60 is composed of two vibration damping block pieces 60p arranged back to back, and the block fixing part 81 of the support bracket 8 extends from the mating surface at the middle position in the vertical direction of the vibration damping block 60. However, the vibration damping block 60 does not necessarily have to be composed of two vibration damping block pieces 60p arranged back to back. That is, for example, as Figure 7 As shown, the vibration damping block 60 can also be composed of a single vibration damping block sheet 60p, in which case, for example, Figure 7 In the configuration example of (a), the bottom of the vibration damping block 60 can be fixed to the upper side of the fixed base 7, and the upper end of the vibration damping block 60 can be fixed to the block fixing part 81 of the support bracket 8.

[0139] Or such as Figure 7 As shown in (b), the upper part of the fixed base 7 can be formed into a "ko" shape when viewed in cross section, the upper end of the vibration damping block 60 is fixed to the upper part of the fixed base 7 (upper block fixing part 73), and the bottom of the vibration damping block 60 is fixed to the block fixing part 81 of the support bracket 8.

[0140] [Symbol Explanation]

[0141] 1. Vibration damping mechanism

[0142] 2 Vibrating matrix

[0143] 21 Mounting Base

[0144] 3 Vibration-isolated object (vibration-isolated object)

[0145] 32 base plate

[0146] 32h bolt hole

[0147] 33 Sensor Probes

[0148] 4 load-bearing vibration damper

[0149] 41 anti-vibration blocks

[0150] 42 Fixed Flange

[0151] 43 Top Washer

[0152] 44 top bolts

[0153] 45 nuts

[0154] 5 vibration damping units

[0155] 6 anti-vibration elements

[0156] 60 vibration damping blocks

[0157] 60p vibration damping block

[0158] 61 Top Side Panel

[0159] 61b double-ended bolt

[0160] 62 Bottom and side panels

[0161] 62b bolt

[0162] 62N nuts

[0163] 62h bolt hole

[0164] 63 nuts

[0165] 7 Fixed base

[0166] 71 Base Fixing Part

[0167] 71s base mounting slot

[0168] 72 Lower Block Fixing Part

[0169] 72s lower block mounting slot

[0170] 73 Upper Block Fixing Part

[0171] 73s upper block mounting slot

[0172] 74 Connecting Sections

[0173] 75 side panel section

[0174] 75a inspection cut

[0175] 8 support brackets

[0176] 81 fixing parts

[0177] 81h bolt hole

[0178] 82 Fixed part of the vibration-isolated body

[0179] 82b bolts

[0180] 82h bolt hole

[0181] A. Excavator (civil construction vehicle)

[0182] B casing

[0183] C housing section

[0184] CA Protective Cap

[0185] G Center of Gravity

[0186] GH center line

[0187] K cushioning material

[0188] L-axis

Claims

1. A vibration damping mechanism for reducing and avoiding vibrations on a vibrating substrate in a vibrating environment, characterized in that, The composition is as follows: The vibration damping mechanism has the following features: The load-bearing vibration damper supports the weight of the vibration-damped object; and Three or more vibration damping units are installed at the connection between the vibrating substrate and the vibration-damped body; The vibration damping unit is composed of vibration damping elements; The vibration damping element is composed of the following: The vibration damping blocks are made of viscoelastic material; A fixed base is installed on the vibration damping block in a fixed state and has the function of connecting with the vibration base; and A support bracket is fixedly installed on the vibration damping block and has a connection function with the body being damped. Furthermore, the installation method of the vibration damping unit is as follows: at least three vibration damping units are arranged at an angle so that the center lines of the vibration damping blocks are concentrated and point to the center line of gravity in the vertical direction passing through the center of gravity of the body being damped. Furthermore, the vibration damping element is fixed in a state where the initial load of the vibration damping block is zero, with almost no load acting on the vibration damping body, in order to support the vibration damping body.

2. The vibration damping mechanism according to claim 1, characterized in that, In the installation method of the vibration damping unit, the convergence position of the axis of each vibration damping block is located on the center line in the vertical direction that passes through the center of gravity of the body being damped.

3. The vibration damping mechanism according to claim 1, characterized in that, In the installation method of the vibration damping unit, the convergence position of the axis of each vibration damping block is the center of gravity of the body being damped.

4. The vibration damping mechanism according to claim 1, characterized in that, The vibration damping unit consists of a semi-basin-shaped shell portion mounted on a fixed base or support bracket, with the vibration damping element itself housed within the shell portion.

5. The vibration damping mechanism according to claim 1, characterized in that, The vibration damping mechanism is composed of the following: The vibration damping block in the vibration damping unit is composed of a pair of identical back-to-back combinations, and the two ends of the combined vibration damping block are fixed to the vibrating body via a fixed base. On the other hand, a protruding support bracket is provided in the middle part of the back-to-back vibration damping blocks, and the support bracket is fixed to the vibration damped body.

6. A vibration damping mechanism for mitigating and avoiding vibrations of a vibrating substrate in a vibrating environment, characterized in that, The composition is as follows: The vibration damping mechanism has the following features: The load-bearing vibration damper supports the weight of the vibration-damped object; and Three or more vibration damping units are installed at the connection between the vibrating substrate and the vibration-damped body; The load-bearing vibration damper supports the vibration damped body from below; Furthermore, the vibration damping unit includes: A semi-basin-shaped shell portion is disposed on the vibrating base side; and The vibration damping element is positioned within the housing portion in a freely adjustable location. The vibration damping element is formed by fixing the two ends of the vibration damping block in the axial direction inside the housing, and supporting the vibration damped body in a support bracket that protrudes from the middle part in the axial direction. Furthermore, when supporting the vibration-damped body, the load-bearing vibration-damping body supports the weight of the vibration-damped body, so that the vibration-damping block of the vibration-damping element supports the vibration-damped body in a state where the initial load is zero and the vibration-damping block is almost unaffected by the load of the vibration-damped body.

7. The vibration damping mechanism according to claim 6, characterized in that, The vibration-damped body is a three-dimensional laser measurement sensor; Furthermore, the vibrating substrate is a self-propelled work vehicle, or a substrate directly mounted on the work vehicle.

8. A method for assembling a vibration damping unit in a vibration damping mechanism, the vibration damping mechanism being used to reduce and avoid vibration of a vibrating substrate in a vibration environment to support the vibration-damped body, characterized in that: The vibration damping mechanism applicable to the method comprises: The load-bearing vibration damper supports the weight of the vibration-damped object; and Three or more vibration damping units are installed at the connection between the vibrating substrate and the vibration-damped body; The load-bearing vibration damper supports the vibration damped body from below; On the other hand, the vibration damping unit includes: A semi-basin-shaped shell portion is disposed on the vibrating base; and The vibration damping element is positioned within the housing portion in a freely adjustable location. The vibration damping element is formed by fixing the two ends of the vibration damping block in the axial direction inside the housing, and supporting the vibration damped body in a support bracket that protrudes from the middle part in the axial direction. In addition, when the vibration damping unit is fixed to the body being protected, the load-bearing vibration damping body supports the weight of the body being protected, so that the vibration damping unit is fixed in a state where the initial load of the vibration damping block of the vibration damping element is almost zero and is not affected by the load of the body being protected.

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