KR20220041682A - Construction Equipment - Google Patents

Abstract

The present invention relates to construction equipment comprising: an arm connected between a boom and an attachment for construction equipment, and provided with a vibration absorbing space part on the inside; and a vibration reduction system installed in the vibration absorbing space part and absorbing a shock vibration transmitted to the arm, wherein the vibration reduction system includes at least one first vibration reducing part composed of one or more enclosure components installed inside the vibration absorbing space part, and a particle component filled inside the enclosure components. According to the present invention, regardless of a type of attachment mounted on the arm, the arm can stably absorb the shock vibration generated from the attachment.

Description

Construction Equipment

The present invention relates to construction equipment.

A variety of construction equipment is used at work sites such as construction sites or civil engineering sites. Construction equipment has a mechanical structure and performance suitable for each type of construction, such as roads, rivers, ports, railways, and plants. In other words, construction equipment can be divided into excavation equipment, loading equipment, transport equipment, unloading equipment, compaction equipment, foundation construction equipment, etc. It is a concept that includes many types of equipment such as trucks and rollers.

Such construction equipment may be composed of a traveling body, a revolving body, a working device, and an attachment mounted on the working device. Attachments are properly mounted on the arm according to the condition of the soil and rocks, the type of work, and the use. , gourds, etc., are of various types.

The recent development of construction equipment places a lot of weight on creating a comfortable working environment for drivers through low cabin vibration and low noise. In the case of construction equipment such as excavators and wheel loaders, many vibration/noise sources such as engines, fans, MCVs, and hydraulic pumps are located around the cabin, and the noise and vibrations generated from these vibration/noise sources impair the comfort of the operator in the cabin.

In the case of construction equipment, work is often carried out in a harsh environment unlike general transportation methods. There is a problem of a decrease in durability.

In order to reduce the vibration impact in the work that induces excessive vibration such as breaker work, if the crushing strength (vibration excitation source; cause of vibration) of the breaker is reduced, there is a problem in that work efficiency is reduced.

Accordingly, a technique for maximizing a vibration transmission loss through the configuration of a vibration reducing hydraulic system, etc. is used, but this technique has a problem in that it is not efficient due to a huge increase in cost.

In addition, conventionally, a technology for selectively controlling the entire frequency band (low frequency to high frequency) of a target to be reduced in vibration has been applied, but there was a difficulty in reducing vibration of low and high frequencies at the same time.

The present invention was created to solve the problems of the prior art as described above, and an object of the present invention is to stably absorb the shock vibration generated from the attachment in the arm regardless of the type of the attachment mounted on the arm. to provide equipment.

Construction equipment according to an aspect of the present invention is installed between the boom and the attachment for construction equipment, the arm is provided with a vibration absorbing space on the inside; and a vibration reduction system installed in the vibration absorption space to absorb shock vibration transmitted to the arm, wherein the vibration reduction system comprises: one or more enclosure components installed inside the vibration absorption space; It may include at least one first vibration reducing unit made of a particle component filled inside the component.

Specifically, the one or more first vibration reducing units may further include a first elastic component that is fixedly installed on the inner wall of the vibration absorbing space and connected to at least one of the one or more enclosure components.

Specifically, the vibration reduction system may further include one or more second vibration reduction units, and the second vibration reduction unit may include: a second elastic component fixed to an inner wall of the vibration absorbing space; and a mass component connected to the second elastic component.

The construction equipment according to the present invention constitutes a vibration reduction system by connecting an enclosure component filled with a particle component to an elastic component fixedly installed inside the vibration absorbing space of the arm, thereby reducing low-frequency and high-frequency vibration by the particle component. In addition, by giving the combined weight of the enclosure component and the particle component to the elastic component, vibration between low and high frequencies can be reduced, effectively reducing all vibrations from the entire frequency band (low frequency to high frequency) of the arm that you want to reduce vibration at the same time. can do it

In addition, in the construction equipment of the present invention, the vibration reduction system is configured to consist of a first vibration reduction unit and a second vibration reduction unit, and the first vibration reduction unit is a particle component filled in an enclosure component, and the low frequency band is used in the entire frequency band of the arm. and dissipating high-frequency vibrational energy as frictional energy to reduce arm vibration, and the second vibration-reducing unit gives the weight of the mass component to the elastic component so that the excitation frequency between low and high frequencies in the entire frequency band of the arm and By configuring to reduce the vibration of the arm by allowing it to resonate, it is possible to simultaneously reduce all vibrations in the entire frequency band (low frequency to high frequency) of the arm that you want to reduce vibration. Not only can it be created, but it can also increase the working efficiency and at the same time increase the durability life of each part of the equipment.

In addition, the construction equipment of the present invention is divided into a high vibration zone, a medium vibration zone, and a low vibration zone based on the mode shape of the resonance frequency obtained through eigenmode analysis of the arm, and the arm in the high vibration zone and the medium vibration zone The vibration reduction system can be designed to have a natural frequency that matches the vibration frequency of

In addition, the construction equipment of the present invention can simplify the configuration of the vibration reduction system, thereby reducing the cost, and can maximize the vibration reduction effect even with a simple structure and small cost increase, so it is more efficient than other vibration reduction devices. can be very good in that respect.

1 is a side view of a construction equipment according to an embodiment of the present invention.
2 is an internal perspective view of an arm on which the vibration reduction system of the present invention is installed.
3 is a diagram illustrating a mode shape of a resonance frequency obtained through eigenmode analysis of an arm.
4 is a view for explaining a first embodiment of the vibration reduction system of the present invention.
5 is a view for explaining a second embodiment of the vibration reduction system of the present invention.
6 is a view for explaining a third embodiment of the vibration reduction system of the present invention.

The objects, specific advantages and novel features of the present invention will become more apparent from the following detailed description and preferred embodiments taken in conjunction with the accompanying drawings. In the present specification, in adding reference numbers to the components of each drawing, it should be noted that only the same components are given the same number as possible even though they are indicated on different drawings. In addition, in describing the present invention, if it is determined that a detailed description of a related known technology may unnecessarily obscure the gist of the present invention, the detailed description thereof will be omitted.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

1 is a side view of a construction equipment according to an embodiment of the present invention, FIG. 2 is an internal perspective view of an arm in which the vibration reduction system of the present invention is installed, and FIG. 3 is a mode shape of the resonance frequency obtained through eigenmode analysis of the arm. (mode shape), Figure 4 is a diagram for explaining a first embodiment of the vibration reduction system of the present invention, Figure 5 is a diagram for explaining a second embodiment of the vibration reduction system of the present invention and FIG. 6 is a view for explaining a third embodiment of the vibration reduction system of the present invention.

1 to 4 , in the construction equipment 1 according to an embodiment of the present invention, the vibration reduction system 100 may be installed on the arm 32 .

In this embodiment, the case of an excavator as the construction equipment 1 will be described as an example, and the present invention is not limited thereto and may include various types of construction equipment requiring vibration reduction due to the occurrence of shock vibration during operation. .

The construction equipment 1 includes a traveling body 10 , a revolving body 20 , and a working device 30 .

The traveling body 10 is a configuration that enables the movement of the construction equipment 1 and may be applied to tracks or wheels. Then, the revolving body 20 is rotatably mounted on the traveling body 10 by 360 degrees, and includes a cab and a machine room.

The work device 30 implements the work. In this case, the operation may refer to various operations such as lifting materials, compacting the ground, or crushing rocks. The working device 30 may include a boom 31 , an arm 32 , and an attachment 33 .

The boom 31 is provided on the revolving body 20 and may have a curved shape in a “L” shape. The movement of the boom 31 may be made by a boom cylinder 311 operating hydraulically, and the boom cylinder 311 may be configured as a pair to connect both sides of the revolving body 20 and the boom 31, respectively. there is.

The arm 32 is connected to the boom 31 , and enables work while moving up, down, left and right by the movement of the boom 31 in a state in which the attachment 33 is mounted.

The movement of the arm 32 may be made by a hydraulically operated arm cylinder 321 , which connects the boom 31 and the arm 32 between a pair of boom cylinders 311 . provided and may be configured as one.

The attachment 33 is used while being properly mounted on the arm 32 according to the condition of the soil and rocks, the type of work and the use. There are various types such as crusher, drill, tongs, and gourd.

The movement of the attachment 33 may be achieved by the hydraulically operated attachment cylinder 331 .

The attachment 33 described above is a part in direct contact with the work object, and shock vibration is generated while in contact with the work object, and the generated shock vibration is the boom 31 through the arm 32 and, in severe case, the revolving body 20 ) is transmitted.

For example, when working using the attachment 33 for an excavator, vibrations and shocks occur because the ground is dug or cut out, and the vibrations and shocks are transmitted from the arm 32 to the boom 31 while being transmitted to the arm ( 32) and the attachment part 33 and the connection part of the arm 32 and the boom 31 may reduce the lifespan of the connection part, give fatigue to the operator, and cause musculoskeletal disorders.

Hereinafter, when the construction equipment 1 described above performs work at a certain work site, the shock vibration generated from the attachment 33 is efficiently reduced in the arm 32 in the vibration reduction system 100 . to explain about it.

The vibration reduction system 100 of the present invention is installed in the vibration absorption space 322 provided on the inner side 323 of the arm 32 to absorb the shock vibration transmitted to the arm 32 during the attachment operation. there is. In this embodiment, the inner side 323 of the arm 32 may refer to the inner wall of the arm 32 .

As shown in FIG. 2 , the vibration reduction system 100 is installed in a portion of the vibration absorbing space 322 , and may be selectively installed in a location where shock vibration is severe.

In FIG. 2, it is shown that the vibration absorbing space part 322 is selectively installed below and above, which is, as shown in FIG. 3, the mode shape of the resonance frequency obtained through eigenmode analysis of the arm 32. ), divided into a red high vibration area (A1), a yellow medium vibration area (A2), and a blue low vibration area (A3), and the lower high vibration area (A1) and vibration of the vibration absorbing space 322 It is selectively installed in the upper middle vibration area (A2) of the absorption space (322).

3 shows the displacement contour of the eigenmode of the arm 32 at 190Hz, and when the eigenmode of the arm 32 is different, the displacement contour may also appear differently, reducing vibration at the position shown in FIG. 2 . Of course, the system 100 may not be installed.

That is, the vibration reduction system 100 of the present invention is divided into a high vibration zone (A1), a medium vibration zone (A2), a low vibration zone (A3), etc. through eigenmode analysis as shown in FIG. can At this time, the vibration reduction system 100 may be designed to have a natural frequency corresponding to the excitation frequency of the arm 32 in each of the high vibration zone A1 and the medium vibration zone A2 .

As shown in FIG. 4 as a first embodiment, the above-described vibration reduction system 100 includes a first elastic component 111 and an enclosure to absorb the shock vibration transmitted to the arm 32 during the attachment operation. It may include a component 112 and a particle component 113 .

A plurality of first elastic components 111 are fixedly installed on the inner side 323 of the vibration absorbing space 322, and may be configured to have rigidity acting as a spring and damping characteristics acting as a damper.

The first elastic component 111 may be configured by using a damping property of a material or by adding an additional damper. The first elastic component 111 may be composed of a general coil spring, a rubber mount part, an air spring (compressor-connected type or sealed type), a viscoelastic material, etc., and may be formed in various shapes such as a rod shape, a column shape, etc. is of course

The enclosure component 112 may be connected to at least one or more or all of the plurality of first elastic components 111 , and may be one when the enclosure component 112 is connected to all of the plurality of first elastic components 111 , , when connected to at least one or more of the first elastic component 111 may be one or more.

When a plurality of enclosure components 112 are installed, the plurality of enclosure components 112 may have the same size or different sizes, and a space may be provided therein to fill the particle components 113 . The enclosure component 112 may be made of metal and may be designed to have a certain weight.

The enclosure component 112 gives the weight of the particle component 113 filled therein to the first elastic component 111 to resonate with the excitation frequency between the low and high frequencies in the entire frequency band of the arm 32 . Thus, the vibration of the arm 32 can be reduced.

The particle component 113 may be filled inside the enclosure component 112 and may be a metal bead in the form of small particles.

The particle component 113 may reduce vibration of the arm 32 by dissipating vibration energy of low and high frequencies in the entire frequency band of the arm 32 as friction energy.

That is, the particle component 113 can dissipate the dynamic vibration energy as friction energy due to the forced motion of the particles by the vibration of the arm 32, and the main performance factors are the size of the particles, the filling rate, the friction force, etc. This can be considered and applied when designing.

Through this, the present embodiment connects the enclosure component 112 filled with the particle component 113 to the first elastic component 111 fixedly installed on the inner side 323 of the vibration absorbing space 322 of the arm 32 . By configuring the vibration reduction system 100, it is possible to simultaneously reduce all vibrations up to the entire frequency band (low frequency ~ high frequency) of the arm 32 to reduce vibration.

As shown in FIG. 5 as a second embodiment, the vibration reduction system 100 includes the first vibration reduction unit 110 and the second It may include a vibration reducing unit 120 .

One or more of the first vibration reducing unit 110 may be installed on the inner side 323 of the vibration absorbing space 322 .

The first vibration reduction unit 110 is the same as the first elastic component 111 , the enclosure component 112 and the particle component 113 constituting the vibration reduction system 100 of the first embodiment described with reference to FIG. 4 . Alternatively, they may be similar, and accordingly, detailed descriptions thereof will be omitted here to avoid duplicate descriptions.

However, the first vibration reduction unit 110 of the vibration reduction system 100 according to the present embodiment is performed in the entire frequency band of the arm 32 by the particle component 113 filled in the enclosure component 112 . It may be designed to reduce vibration of the arm by dissipating vibration energy of low and high frequencies as friction energy, which is the first vibration reducing unit 110 generates vibration between low and high frequencies in the entire frequency band of the arm 32 . This does not mean that it cannot be reduced.

That is, in the case of the vibration reduction system 100 according to the first embodiment described above with reference to FIG. 4 , if it is designed to simultaneously effectively reduce all vibrations up to the entire frequency band (low frequency to high frequency) of the arm 32 , so that the first vibration reducing unit 110 of the vibration reducing system 100 according to the present embodiment can share the role of reducing vibration with the second vibration reducing unit 120 to be described later, the entire frequency band of the arm 32 . This means that the design focuses on reducing low- and high-frequency vibrations.

The second vibration reducing unit 120 may include a second elastic component 121 and a mass component 122 to absorb the shock vibration transmitted to the arm 32 during the attachment operation.

A plurality of second elastic components 121 are fixedly installed on the inner side 323 of the vibration absorbing space 322, and may be configured to have rigidity acting as a spring and damping characteristics acting as a damper.

The second elastic component 121 may be configured by using a damping property of a material or by adding an additional damper. The second elastic component 121 may be composed of a general coil spring, a rubber mount part, an air spring (compressor-connected type or sealed type), a viscoelastic material, etc., and may be formed in various shapes such as a rod shape, a column shape, etc. is of course

The second elastic component 121 may be the same as or different from the first elastic component 111 of the vibration reduction system 100 according to the first embodiment described with reference to FIG. 4 .

The mass component 122 may be connected to at least one or all of the plurality of second elastic components 121 to impart a certain weight to the second elastic component 121 , and the mass component 122 may include the plurality of second elastic components 121 . When connected to all of the two elastic components 121 , it may be one, and when connected to at least one or more of the second elastic components 121 , it may be one or more.

When a plurality of mass components 122 are installed, the plurality of mass components 122 may have the same or different size and weight, and are formed in various shapes such as large and small plate shapes using a material such as metal to impart weight. can be

The mass component 122 gives a certain weight to the second elastic component 121 so that when shock vibration is generated in the arm 32 , it resonates with the excitation frequency between low and high frequencies in the entire frequency band of the arm 32 . Thus, the vibration of the arm 32 can be reduced.

As described above, the second vibration reducing unit 120 gives the weight of the mass component 122 to the second elastic component 121 so that the excitation frequency between the low and high frequencies in the entire frequency band of the arm 32 and It can be designed to resonate and reduce the vibration of the arm 32, which means that the second vibration reducing unit 120 cannot reduce low-frequency and high-frequency vibrations in the entire frequency band of the arm 32. it is not

That is, since the first vibration reducing unit 110 is designed with an emphasis on reducing low and high frequency vibrations in the entire frequency band of the arm 32, the second vibration reducing unit 120 is replaced with the arm 32. This means that the design focuses on reducing the vibration between low and high frequencies in the entire frequency band.

As shown in FIG. 6 as a third embodiment, the vibration reduction system 100 includes the first vibration reduction unit 110 and the second vibration reduction unit 110 to absorb the shock vibration transmitted to the arm 32 during the attachment operation. It may include a vibration reducing unit 120 .

One or more of the first vibration reducing unit 110 may be installed inside 323 of the vibration absorbing space 322 , and may include an enclosure component 112 and a particle component 113 .

At least one enclosure component 112 may be fixedly installed on the inner side 323 of the vibration absorbing space 322 .

The at least one or more enclosure components 112 may have the same size or different sizes, and a space may be provided therein to fill the particle components 113 . Enclosure component 112 may be made of metal.

The particle component 113 may be filled inside the enclosure component 112 and may be a metal bead in the form of small particles.

The particle component 113 may reduce vibration of the arm 32 by dissipating vibration energy of low and high frequencies in the entire frequency band of the arm 32 as friction energy.

That is, the particle component 113 can dissipate the dynamic vibration energy as friction energy due to the forced motion of the particles by the vibration of the arm 32, and the main performance factors are the size of the particles, the filling rate, the friction force, etc. This can be considered and applied when designing.

As described above, the first vibration reducing unit 110 dissipates low-frequency and high-frequency vibration energy in the entire frequency band of the arm 32 as friction energy by the particle component 113 filled in the enclosure component 112 . to reduce the vibration of the arm 32 , which does not mean that the first vibration reducing unit 110 cannot reduce the vibration between the low frequency and the high frequency in the entire frequency band of the arm 32 .

The second vibration reducing unit 120 may include a second elastic component 121 and a mass component 122 to absorb the shock vibration transmitted to the arm 32 during the attachment operation.

The second vibration reducing unit 120 of this embodiment is the same as or similar to the configuration of the second vibration reducing unit 120 of the vibration reducing system 100 according to the second embodiment described with reference to FIG. In order to avoid the detailed description will be omitted.

As such, in this embodiment, the vibration reduction system ( 100), vibration of low and high frequencies can be reduced by the particle component 113, and the combined weight of the enclosure component 112 and the particle component 113 is given to the elastic component to reduce vibration between low and high frequencies. It is possible to reduce all vibrations reaching the entire frequency band (low frequency to high frequency) of the arm 32 to be reduced effectively simultaneously.

In addition, in this embodiment, the vibration reduction system 100 is configured to include the first vibration reduction unit 110 and the second vibration reduction unit 120 , but the first vibration reduction unit 110 is formed by using the enclosure component 112 . ) to reduce vibration of the arm 32 by dissipating vibration energy of low and high frequencies in the entire frequency band of the arm 32 as friction energy by the particle component 113 filled in the second vibration reducing unit By giving 120 the weight of the mass component 122 to the elastic component to resonate with the excitation frequency between the low and high frequencies in the entire frequency band of the arm 32 to reduce the vibration of the arm 32, It is possible to simultaneously reduce all vibrations in the entire frequency band (low frequency to high frequency) of the arm 32 that you want to reduce vibration, so that it is possible to create a comfortable working environment for the operator by maximizing the effect of reducing shock and vibration, as well as work efficiency It can increase the durability and at the same time increase the durability life of each part of the equipment.

In addition, in this embodiment, based on the mode shape of the resonance frequency obtained through eigenmode analysis of the arm 32, it is divided into a high vibration area (A1), a medium vibration area (A2), and a low vibration area (A3). , the vibration reduction system 100 is designed to have a natural frequency that matches the excitation frequency of the arm 32 in the high and medium vibration zones, and the designed vibration reduction system 100 can be placed in the right place. Therefore, it is possible to further maximize the effect of reducing shock and vibration.

In addition, in this embodiment, the configuration of the vibration reduction system 100 can be simplified, so that the cost can be reduced, and the vibration reduction effect can be maximized with a simple structure and a small cost increase, so compared to other vibration reduction devices. It can be very good in terms of efficiency.

In the above, the present invention has been described focusing on the embodiments of the present invention, but this is merely an example and does not limit the present invention. It will be appreciated that various combinations or modifications and applications not illustrated in the embodiments are possible within the scope. Accordingly, descriptions related to modifications and applications that can be easily derived from the embodiments of the present invention should be interpreted as being included in the present invention.

1: Construction equipment 10: Driving body
20: revolving body 30: working device
31: boom 311: boom cylinder
32: female 321: female cylinder
322: vibration absorption space part 323: inner
33: attachment 331: attachment cylinder
100: vibration reduction system 110: first vibration reduction unit
111: first elastic component 112: enclosure component
113: particle component 120: second vibration reduction unit
121: second elastic component 122: mass component
A1: High vibration zone A2: Medium vibration zone
A3: Low vibration zone

Claims (3)

an arm connected between the boom and the attachment for construction equipment and provided with a vibration absorbing space on the inside; and
and a vibration reduction system installed in the vibration absorbing space and absorbing the shock vibration transmitted to the arm,
The vibration reduction system,
A construction equipment comprising: at least one enclosure component installed inside the vibration absorbing space; and at least one first vibration reducing unit comprising a particle component filled in the enclosure component. According to claim 1, wherein the at least one first vibration reducing unit,
The construction equipment further comprising a first elastic component fixed to the inner wall of the vibration absorbing space and connected to at least one of the one or more enclosure components. According to claim 1, The vibration reduction system,
Further comprising one or more second vibration reduction units,
The second vibration reduction unit,
a second elastic component fixedly installed on the inner wall of the vibration absorbing space; and
Construction equipment comprising a mass component connected to the second elastic component.

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