CN211259466U - Vibration damping system and working machine comprising same - Google Patents

Abstract

The utility model provides a damping system and operation machinery for electronic control module of engine. The vibration damping system comprises a primary support, a secondary support, a primary vibration damping device and a secondary vibration damping device, wherein the primary support is connected to the engine; the primary vibration damping device is connected with the primary support and the secondary support to reduce vibration transmitted from an engine to the secondary support through the primary support; the secondary vibration damping device connects the secondary mount and the component to reduce vibration transmitted from the secondary mount to the component. The work machine includes an engine, the vibration damping system, and at least one component disposed on the vibration damping system. The vibration damping system remarkably improves the vibration damping effect and prolongs the service life of parts; the vibration damping system can be widely applied to vibration damping occasions of various parts, the development cost is saved, and more engine installation space is saved.

Description

Vibration damping system and working machine comprising same

Technical Field

The present invention relates to a vibration damping system for use in an engine of a working machine, for example, and more particularly to a vibration damping system for damping vibration of components of an engine.

Background

As the demand for engine power increases, the vibration of the engine block also increases. Since many engine components are mounted on the engine block by fasteners, vibrations to which these components are subjected are increased compared to conventional ones. When the vibrations experienced exceed their allowable limits, these components may fail, thereby affecting the proper operation of the engine.

As an example, an Engine Control Module (ECM) is a critical component of an engine and the vibration that electronic components can withstand is limited. When the vibrations experienced exceed their allowable limits, the ECM will fail.

One commonly used solution is to mount the components of the engine on the bracket through a vibration damper, such as a rubber vibration damper, and to control the vibration transmitted to the components by using the rigidity and damping characteristics of the rubber vibration damper. However, the damping capacity of a single-stage rubber damping system or primary damping system has been difficult to meet with the long-term reliable operation requirements of certain components, such as ECM.

Further, for a single-stage rubber vibration damping system, since the mounting points of most parts such as the ECM are predetermined or limited and the number and positions of the vibration dampers corresponding to the mounting points cannot be changed, the resonance frequency of the parts such as the ECM can only be avoided by selecting a vibration damper of appropriate rigidity. The shape or material of the shock absorber needs to be changed for adjusting the rigidity, and it is difficult to find the shock absorber which is ready to match various application conditions, so that the shock absorber with proper rigidity and damping cannot be selected to avoid the resonance frequency of the part (such as ECM) and effectively reduce the vibration often occurs. And the difficulty of developing a new shock absorber with rigidity and damping is high, and the development period is long. Therefore, how to adjust the natural frequency of the vibration damping system to be more widely applied to various parts is a problem to be solved.

In addition, on one hand, with the continuous development of engines, the available installation space on the engine body is less and less; on the other hand, the number of parts (e.g., ECM) required to be mounted on the engine is increasing. Therefore, a solution is needed that enables sufficient mounting positions on the engine and that is simple to assemble.

The present invention is directed to solving the above problems and/or other problems in the prior art.

SUMMERY OF THE UTILITY MODEL

The utility model provides a vibration damping system for an electronic control module of an engine, which comprises a primary support, a secondary support, a primary vibration damping device and a secondary vibration damping device, wherein the primary support is connected to the engine; the primary vibration damping device is connected with the primary support and the secondary support to reduce vibration transmitted from an engine to the secondary support through the primary support; the secondary vibration damping device connects the secondary mount and the component to reduce vibration transmitted from the secondary mount to the component.

The utility model also provides a working machine, it includes the engine, as above damping system and setting be in at least one spare part on the damping system.

The utility model has the advantages that the damping effect is obviously improved, and the service life of the parts is prolonged; the natural frequency of the whole vibration damping system is convenient to adjust so as to avoid the resonance frequency of the parts, so that the vibration damping system can be widely applied to vibration damping occasions of various parts, the development cost is saved, and more installation space is saved on an engine.

Drawings

Fig. 1 is a perspective view of an exemplary work machine to which an engine including a vibration damping system according to the present disclosure is applied.

Fig. 2 shows a schematic perspective view of a damping system according to an exemplary embodiment of the present invention;

FIG. 3 shows a schematic front view of the damping system shown in FIG. 2;

FIG. 4 illustrates a schematic cross-sectional view of a primary damping device in the damping system of FIG. 2;

FIG. 5 shows a schematic cross-sectional view of a secondary damping device in the damping system of FIG. 2;

FIG. 6 illustrates a perspective view of the primary mount in the damping system of FIG. 2;

FIG. 7 shows a perspective view of a secondary mount in the damping system of FIG. 2; and

fig. 8 shows a perspective view of another angle of the secondary stent of fig. 7.

Detailed Description

Fig. 1 illustrates an exemplary work machine 100. Work machine 100 may be any type of machine, such as a wheel loader, a wheel dozer, a track-type excavator, etc., that performs operations associated with a particular industry (e.g., construction, mining, farming, transportation, etc.) and operates in a variety of work environments (e.g., construction site, mine site, farm, road, etc.).

The work machine 100 may include a main frame 30, an operator accommodating space (e.g., cab) 35, and a work implement 36. In one embodiment, work implement 36 may be a bucket for a loader. A traveling device 40 is disposed at a lower portion of the work machine 100 to support and move the work machine 100. In one embodiment, the running gear 40 comprises wheels 41. The work machine 100 shown in fig. 1 may include an engine according to the present disclosure and a vibration isolation system disposed on the engine to isolate or dampen components on the engine.

The vibration damping system of the present invention is described in fig. 2-8 with an ECM, an engine control module, as an example of a component of an engine, however, it should be understood by those skilled in the art that the vibration damping system of the present invention is applicable not only to ECMs, but also to any component on an engine.

As shown in FIG. 2, two engine components 1, such as two engine control modules, are shown mounted on an engine via a vibration damping system. According to the exemplary embodiment, the vibration damping system is used for damping vibration of a component 1 mounted on an engine, and as shown in fig. 2 and 3, the vibration damping system includes a primary bracket 2, a secondary bracket 3, a primary vibration damping device 4, and a secondary vibration damping device 5, the primary bracket 2 is connected to the engine, and the primary vibration damping device 4 connects the primary bracket 2 and the secondary bracket 3 to reduce vibration transmitted from the engine to the secondary bracket 3 via the primary bracket; the secondary vibration damping device 5 connects the secondary mount 3 and the component 1 to reduce vibration transmitted to the component 1 via the secondary mount 3.

In the scheme, the secondary support 3 is arranged, the primary vibration damping device 4 is arranged between the secondary support 3 and the primary support 2, and the secondary vibration damping device 5 is arranged between the secondary support 3 and the part 1 to be supported, so that the vibration transmitted from the engine is firstly damped by the primary vibration damping device 4 and then transmitted to the secondary support 3, and then is damped by the secondary vibration damping device 5 and then transmitted to the part 1, and compared with a vibration damping system with only a single-stage vibration damping device, the vibration transmitted from the engine to the part 1 is remarkably reduced.

Preferably, as shown in fig. 2, 3 and 6, a plurality of positions for mounting the primary vibration damping devices 4 are correspondingly provided on the primary bracket 2 and the secondary bracket 3, so that the number of the primary vibration damping devices 4 can be selected and the mounting positions of the primary vibration damping devices 4 on the primary bracket can be adjusted.

In this embodiment, since the primary bracket 2 and the secondary bracket 3 are provided with a plurality of positions for mounting the primary vibration damping devices 4, and in particular, by providing a plurality of first mounting holes 21 formed in the primary bracket 2 for mounting a plurality of primary vibration damping devices 4 as shown in fig. 6 and a plurality of first connecting holes 31 formed in the secondary bracket as shown in fig. 7, the user can freely select the number of the primary vibration damping devices 4 to adjust the natural frequency of the entire vibration damping system, and can also adjust the mounting positions of the primary vibration damping devices 4 on the primary bracket 2 to adjust the natural frequency of the entire vibration damping system, so that in the operation of adjusting the natural frequency of the entire vibration damping system, compared to the conventional embodiment (i.e., the positions and the number of the vibration damping devices should correspond to the positions and the number of the mounting points formed on the component parts, and thus the number and position of the vibration damping devices cannot be adjusted), there is a larger adjustment space. In this exemplary aspect according to the present invention, the natural frequency of the whole damping system can be adjusted only by adjusting the number, mounting position, or stiffness of the primary damping device or the stiffness of the secondary damping device in the damping system (the number and mounting point of the secondary damping device are limited by the inherent number and position of the mounting point on the component to be supported and are not easily adjusted), so as to avoid the resonant frequency of the component. Therefore, the vibration damping system can be widely applied to various parts and components and meets different frequency requirements.

In order to form a plurality of positions for mounting the primary vibration dampers 4 on the primary bracket 2 so that a user can adjust the number and mounting positions of the primary vibration dampers according to a desired frequency, as shown in fig. 6, for example, a plurality of first mounting holes 21 for mounting a plurality of the primary vibration dampers 4 are formed on the primary bracket 2. The primary bracket 2 is also formed with a plurality of second mounting holes 22 for connecting the primary bracket 2 to the body of the engine by third fasteners 24.

Preferably, the primary bracket 2 is formed with a recess 23 on a side away from the engine, and the second mounting hole 22 is located in the recess 23 such that the head of the third fastener 24 is received in the recess 23.

For different components 1, the natural frequency of the damping system needs to be adjusted to avoid the resonant frequency of the component 1. Therefore, by the above exemplary scheme, a plurality of first mounting holes 21 for mounting the primary vibration damping devices 4, that is, for screwing or passing the first fastening members 42 of the primary vibration damping devices 4, are provided on the primary bracket, so that the number of the primary vibration damping devices 4 can be selected, for example, four primary vibration damping devices 4 are selected, or the mounting positions of the primary vibration damping devices 4 are adjusted, and the effect of adjusting the natural frequency of the vibration damping system can be achieved. Of course, the natural frequency can be adjusted by adjusting the stiffness of the primary vibration damping device 4 and the stiffness of the secondary vibration damping device 5 at the same time.

As an example, the secondary support 3 is dimensioned such that at least two of the components 1 can be arranged thereon. The provision of two ECMs is shown by way of example in fig. 2, 3. As can be understood by those skilled in the art, the mounting positions can be provided for a plurality of parts 1 only by adjusting the size and the shape of the secondary support 3, and the problem of the arrangement space shortage on the engine body is solved.

Exemplarily, as shown in fig. 4, the primary vibration damping device 4 includes a vibration damping block 41 and a first fastening member 42, and the vibration damping block 41 is combined with the secondary bracket 3 to damp vibration of the secondary bracket 3; a first fastening member 42 passes through the damper block 41 and is fixed to the primary bracket 3.

The primary bracket 2 and the secondary bracket 3 are coupled together and vibration transmitted from the engine to the secondary bracket 3 through the primary bracket 2 is reduced by coupling the damper block 41 to the secondary bracket 3 and fixing the damper block 41 to the primary bracket 2 by the first fastening member 42.

Preferably, as shown in fig. 4, the primary vibration damping device 4 further includes a spacer 43, a guide 44 and a support 45, wherein two sides of the spacer 43 respectively abut against the head 421 of the first fastening member 42 and the vibration damping block 41; the guide 44 is disposed between the damper block 41 and the body portion 422 of the first fastening member in the radial direction of the first fastening member; both sides of the support member 45 abut against the primary bracket 2 and the guide 44 and the damper block 41, respectively (as shown in fig. 4, the lower side of the support member 45 abuts against the primary bracket 2, and the upper side of the support member 45 abuts against the guide 44 and the damper block 41); the main body portion 422 of the first fastening member is fixed to the primary bracket 2 through the spacer 43, the guide 44, and the support 45.

In this embodiment, the guide element 44 and the support element 45 serve, on the one hand, to guide the first fastening element 42 during the screwing-in process and, on the other hand, to support and limit the first fastening element, i.e. to prevent the first fastening element 42 from being screwed in further when the first fastening element is screwed into a position in which the spacer 43 abuts against the guide element 44.

Preferably, in order to obtain a desired amount of compression of the damper block 41 to obtain a desired damping effect as required, the guide 44 and the support 45 may also be sized such that: the desired amount of compression of the damper block 41 is achieved when the first fastener 42 is screwed to bring the spacer 43 into abutment with the guide 44.

As shown in fig. 4, the damper block 41 may include two damper blocks separated to be pressed against both sides of the secondary bracket 3, respectively. That is, the two damper blocks are pressed against the secondary holder 3 at upper and lower sides of the secondary holder 3 in fig. 4, respectively, to be firmly coupled to the secondary holder 3.

Illustratively, the damper block is shaped as shown in fig. 4 to include a step 411, the step 411 being combined with the secondary holder 3 to provide better positioning of the damper block 41.

As an example, the guide 44 and the support 45 may also be formed as one piece, to facilitate the mounting of the damping system.

Illustratively, the structure of the secondary vibration damping device 5 may be identical to that of the primary vibration damping device 4, and specifically, the secondary vibration damping device 5 may include a vibration damping block 51 and a second fastening member 52, the vibration damping block 51 being combined with a housing of the component 1 to damp vibration of the component; a second fastener 52 is fixed to the secondary bracket 3 through the damper block 51.

The secondary damping device 5 further comprises a spacer 53, a guide 54 and a support 55, wherein two sides of the spacer 53 respectively abut against the head 521 of the second fastening piece 52 and the damping block 51; a guide 54 is provided between the damper block 51 and the body portion 522 of the second fastening member in the radial direction of the second fastening member; both sides of the support member 55 abut against the secondary bracket 3 and the guide member 54, the damper block 51, respectively, and the second fastening member is connected to the secondary bracket 3 through the spacer 53, the guide member 54, and the support member 55. In the embodiment shown in fig. 5, the guide 54 and the support 55 are formed in one piece. The upper side of the support 55 now abuts against the damper block 51. Similarly, the guide 54 and the support 55 are dimensioned such that: the desired amount of compression of the damper block 51 is achieved when the second fastener 52 is tightened to bring the spacer 53 into abutment with the guide 54. The damper mass 51 may include two damper masses 51 separated to be pressed against both sides of the component 1, respectively.

For example, for convenience of installation, the secondary vibration damping device 5 further includes a weld nut 56, and the weld nut 56 is welded to the secondary bracket 3 at a side of the secondary bracket 3 away from the vibration damping block 51.

Those skilled in the art will understand that the specific structures of the primary vibration damping device 4 and the secondary vibration damping device 5 are described above, the structures of the two devices may be the same or different, and other vibration damping structures besides the above-described structures may also be adopted, as long as the corresponding connection and vibration damping functions can be achieved.

Illustratively, as shown in fig. 3 and 6, a machined recess 25 is further formed on the primary bracket to avoid possible interference between the primary bracket 2 and the lower end of the second fastening member 52 of the secondary vibration damping device 5 due to vibration displacement.

As shown in fig. 7 and 8, a plurality of first connection holes 31 may be formed in the secondary bracket 3 for mounting the primary vibration damping device 4; and a plurality of second coupling holes 32 for mounting the secondary vibration damping device 5. The secondary bracket 3 is thus connected to the primary bracket 2 via the primary damping device 4 and to the component part 1 via the secondary damping device 5. As shown in fig. 8, a nut 56 is welded to the secondary bracket 3, and the nut 56 is welded to the secondary bracket 3. As shown in fig. 5, the second fastening member 52 of the secondary vibration damping device 5 is screwed into the weld nut 56 through the spacer 53, the guide member 54, and the support member 55, thereby being connected to the secondary bracket 3, and is fixed to the component 1 by compressing the vibration damping block 51, thereby achieving vibration damping of the component 1.

As an exemplary embodiment, the present disclosure also provides a work machine including an engine, a damping system according to any of the preceding examples, and at least one component disposed on the damping system. The vibration reduction system realizes better vibration reduction of parts, realizes the effect of more flexibly adjusting the natural frequency of the vibration reduction system, has wider application range, saves the installation space on the engine, avoids the problem of insufficient installation space caused by the fact that all the parts are installed on the engine, and has corresponding advantages, such as longer service life, more parts can be installed on the engine, and the like.

Industrial applicability

According to the utility model discloses a damping system can be used to the damping of engine spare part, especially is used for the damping of the engine control module ECM on the engine to make various accurate electronic components in the ECM can obtain abundant vibration isolation and protection.

Specifically, when the work machine 100 is operating, the engine in operation has unbalanced mass movements, such as pistons, connecting rods, etc., that generate periodic inertial forces and moments as the engine operates, causing the engine to vibrate. Meanwhile, the operation working condition of the operation machine is complex, so that the operation machine vibrates greatly. Various vibrations are transmitted through the engine to the primary carrier 2 connected to the engine. While the vibration of the primary bracket 2 is reduced by the action of the damping mass 41 in the primary damping device and is only partially transmitted to the secondary bracket 3, and the vibration of the secondary bracket 3 is reduced significantly by the action of the damping mass 51 in the secondary damping device 5 and is finally transmitted to the component 1.

In the selection process of the vibration damping system, a user can select the number of the primary vibration damping devices 4 mounted on the primary bracket, for example, four or six primary vibration damping devices 4 are selected, or the mounting positions of the primary vibration damping devices 4 are adjusted, and simultaneously, the natural frequency of the vibration damping system is adjusted by adjusting the rigidity of the primary vibration damping devices 4 and the rigidity of the secondary vibration damping devices 5 so as to avoid the resonance frequency of the parts. The secondary support may also be sized and shaped appropriately as needed to fit a number of desired components.

It will be apparent to those skilled in the art that various modifications and variations can be made in the embodiments disclosed above without departing from the scope or spirit of the invention. Other embodiments of the invention will be apparent to those skilled in the art from consideration of the specification and practice of the invention disclosed herein. It is intended that the specification and examples disclosed herein be considered as exemplary only, with a true scope of the disclosure being indicated by the following claims and their equivalents.

Claims (17)

1. A vibration damping system for damping vibration of an engine-mounted component, said vibration damping system comprising:

a primary bracket (2) connected to the engine;

a secondary stent (3);

a primary vibration damping device (4) connecting the primary mount (2) and the secondary mount (3) to reduce vibration transmitted from an engine through the primary mount (2) to the secondary mount (3); and

a secondary vibration damping device (5) connecting the secondary mount (3) and the component (1) to reduce vibrations transmitted to the component (1) via the secondary mount (3).

2. Damping system according to claim 1, characterized in that a plurality of positions for mounting the primary damping devices (4) are provided on the primary carrier (2) and the secondary carrier (3) respectively, so that the number of primary damping devices (4) can be selected and the mounting position of the primary damping devices (4) on the primary carrier can be adjusted.

3. Damping system according to claim 1, characterized in that the secondary carrier (3) is dimensioned such that at least two of the components (1) can be arranged thereon.

4. Damping system according to claim 1, characterized in that the primary damping device (4) comprises:

a vibration damping block (41) coupled to the secondary support (3) to damp vibration of the secondary support (3); and

a first fastener (42) passing through the damper block (41) and fixed to the primary bracket (2).

5. Damping system according to claim 4, characterized in that the primary damping device (4) further comprises:

a spacer (43), both sides of the spacer (43) abutting against the head (421) of the first fastener (42) and the damper block (41), respectively;

a guide (44), the guide (44) being disposed between the damper block (41) and a body portion (422) of the first fastening member in a radial direction of the first fastening member; and

a support (45), the support (45) abutting on one side against the primary support (2) and on the other side against the guide (44) and the damping mass (41);

wherein the main body portion (422) of the first fastening member passes through the spacer (43), the guide (44), and the support member (45) and is fixed to the primary bracket (2).

6. The vibration damping system of claim 5,

the guide (44) and the support (45) are dimensioned such that: the damper block (41) achieves a desired amount of compression when the first fastener (42) is screwed to bring the spacer (43) into abutment with the guide (44).

7. The vibration damping system of claim 4,

the damper block (41) includes two damper blocks separated to be pressed against both sides of the secondary mount (3), respectively.

8. Damping system according to claim 1, characterized in that the secondary damping device (5) comprises:

a vibration damping block (51) combined with a housing of the component (1) to damp vibration of the component; and

and a second fastening member (52) passing through the damper block (51) and fixed to the secondary bracket (3).

9. Damping system according to claim 8, characterized in that the secondary damping device (5) further comprises:

a spacer (53), both sides of the spacer (53) abutting against the head (521) of the second fastener (52) and the damper block (51), respectively;

a guide member (54) provided between the damper block (51) and a body portion (522) of the second fastening member in a radial direction of the second fastening member;

and a support (55), the support (55) abutting on one side against the secondary bracket (3) and on the other side against the guide (54) and the damping mass (51);

wherein the second fastener passes through the spacer (53), the guide (54), and the support (55) and is fixed to the secondary bracket (3).

10. Damping system according to claim 9, characterized in that the guide (54) and the support (55) are formed in one piece.

11. Damping system according to claim 9 or 10,

the guide (54) and the support (55) are dimensioned such that: the damper block (51) achieves a desired amount of compression when the second fastener (52) is tightened to bring the spacer (53) into abutment with the guide (54).

12. The vibration damping system of claim 8,

the damper mass (51) includes two damper masses (51) separated to be pressed against both sides of the component part (1), respectively.

13. The vibration damping system of claim 8,

the secondary damping device (5) further comprises a welding nut (56), and the welding nut (56) is welded on the secondary support (3) at one side, far away from the damping block (51), of the secondary support (3).

14. Damping system according to claim 2, characterized in that said primary support (2) has formed thereon:

a plurality of first mounting holes (21) for mounting a plurality of the primary vibration damping devices (4);

a plurality of second mounting holes (22) to connect the primary bracket (2) to the engine by third fasteners (24); wherein the primary bracket (2) is formed with a recess (23) on a side away from the engine, and the second mounting hole (22) is located in the recess (23) such that a head of the third fastener (24) is received in the recess (23).

15. Damping system according to claim 2, characterized in that said secondary support (3) has formed thereon:

a plurality of first connection holes (31) for mounting the primary vibration damping device (4);

a plurality of second connection holes (32) for mounting the secondary damping device (5).

16. A work machine, comprising:

an engine for a vehicle, the engine having a motor,

the vibration damping system according to any one of claims 1-15; and

at least one component disposed on the damping system.

17. The work machine of claim 16, wherein said component is an engine control module.

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