JP2010230038A - Vibration absorbing device and self-propelled working machine equipped with the same - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a vibration absorbing device capable of achieving a large damping effect while maintaining amplitude. <P>SOLUTION: The vibration absorbing device includes a casing 17 fixed to a rotating frame 6, high-viscosity liquid 20 enclosed in the casing 17 and giving resistance force to a member moving in the casing 17 such that the more the moving speed is high, the more the resistance force is large, a vertical shaft 19 fixed to a cab 8 so as to displace together with the cab 8, an elastic member 18 connecting the vertical shaft 19 and the casing 17 so that at least a part of the vertical shaft 19 is immersed in the high-viscosity liquid 20 in the casing 17, a rotating member 30 immersed in the high-viscosity liquid 20 and connected to the vertical shaft 19 to move in the high-viscosity liquid 20 together with the vertical shaft 19, and a speed increasing mechanism moving the rotating member 30 together with the vertical shaft 19 so that, with relative movement of the vertical shaft 19 to the casing 17, at least a part of the rotating member 30 moves in the high-viscosity liquid 20 at a speed higher than the speed of the relative movement. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a vibration absorbing device that is provided between a first member and a second member and absorbs vibrations transmitted between the first member and the second member.

  Conventionally, for example, a highly viscous liquid-sealed mount as shown in FIG. 5 is known as the vibration absorbing device.

  The highly viscous liquid-sealed mount 101 includes a bottomed container-like casing 102, a cylindrical elastic body 103 provided on the upper portion of the casing 102, a rigid shaft 104 fixed to the inside of the cylindrical elastic body 103, A damping plate 105 attached to the lower end of the rigid shaft 104 and a highly viscous liquid 106 enclosed in the casing 102 are provided. The casing 102 is fixed to a predetermined attachment portion, while the rigid shaft 104 is fixed to an attachment object attached to the attachment portion. The cylindrical elastic body 103 is fixed to both the casing 102 and the rigid shaft 104, holds the rigid shaft 104 at a predetermined position in a state where no vibration occurs, and elastically deforms when vibration occurs. Relative displacement between the casing 102 and the rigid shaft 104 is allowed.

  When vibration is input to the casing 102 in the high-viscosity liquid enclosure mount 101, the cylindrical elastic body 103 is elastically deformed, and the damping plate 105 (the rigid shaft 104) and the casing 102 are relatively displaced. At this time, since the high-viscosity liquid flows through the gap between the inner surface of the casing 102 and the outer surface of the damping plate and is sheared, there is a gap between the attachment portion and the attachment target according to the viscosity of the high-viscosity liquid. Damping force is generated. As described above, in the high-viscosity liquid-sealed mount 101, a greater damping effect can be obtained as the moving range of the damping plate 105, that is, the rigid shaft 104 is larger.

  In order to obtain a greater damping effect, for example, Patent Document 1 discloses a liquid-filled suspension having a large vertical vibration stroke. FIG. 6 is a side sectional view showing a liquid-filled suspension according to Patent Document 1. As shown in FIG.

  Referring to FIG. 6, a liquid-filled suspension 107 of Patent Document 1 includes a container 108, a guide shaft 109, a mount rubber 110 that supports the guide shaft 109 in a lateral direction with respect to the container 108, and a container 108. And a spring member 111 that supports the guide shaft 109 in the axial direction. The mount rubber 110 supports the guide shaft 109 in the lateral direction while being slidable in the axial direction. That is, since the liquid-filled suspension 107 according to Patent Document 1 includes the mount rubber 110 that supports the guide shaft 109 in the lateral direction and the spring member 111 that supports the guide shaft 109 in the axial direction, the spring member 111. Depending on the setting, the vertical vibration stroke of the guide shaft 109 can be increased.

JP-A-8-254241

  However, since the liquid-filled suspension 107 of Patent Document 1 increases the vibration stroke in the axial direction of the guide shaft 109, the amplitude between the guide shaft 109 and the container 108 when vibration occurs is increased. There was a problem.

  The present invention has been made in view of the above problems, and an object of the present invention is to provide a vibration absorber capable of obtaining a large damping effect while maintaining the amplitude.

In order to solve the above-described problems, the present invention provides a vibration absorber for absorbing vibration transmitted between the first member and the second member while connecting the first member and the second member. There,
A storage member fixed to the first member and capable of enclosing a fluid therein, and a viscosity that gives a greater resistance to the member that is enclosed in the storage member and moves in the storage member as the moving speed increases. A vibration-absorbing fluid, a fixed member fixed to the second member so as to be displaced together with the second member, and at least a part of the fixed member in the vibration-absorbing fluid in the storage member An elastic member capable of connecting the fixed member and the storage member so as to be immersed in the storage member and elastically deforming the fixed member to allow relative displacement of the fixed member with respect to the storage member; and the vibration An interlocking member that is immersed in the absorbing fluid and connected to the fixed member so as to move in the vibration absorbing fluid in conjunction with the fixed member, and a relative movement of the fixed member with respect to the storage member In And a speed increasing mechanism for interlocking the interlocking member with the fixed member so that at least a part of the interlocking member moves in the vibration absorbing fluid at a speed higher than the relative movement speed. A vibration absorber is provided.

  According to the present invention, the interlocking member can be moved in the vibration absorbing fluid at a speed higher than the relative moving speed between the storage member and the fixed member by the speed increasing mechanism. A great resistance can be obtained.

  Therefore, according to the present invention, it is possible to obtain a large damping effect while maintaining the relative displacement amount, that is, the amplitude of the first member and the second member.

  In the vibration absorbing device, the speed increasing mechanism includes a rotation support portion that supports the interlocking member on the storage member side so that the interlocking member can rotate around a predetermined rotation fulcrum. The position of the moving fulcrum is greater than the distance from the rotating fulcrum to the connecting part of the interlocking member where the interlocking member is connected to the fixed member. It is preferable that the distance is set so as to increase the distance to the part opposite to the part.

  According to this configuration, by increasing the turning radius from the turning fulcrum to the portion on the side opposite to the connecting portion, than the turning radius from the turning fulcrum to the connecting portion of the interlocking member to the fixed member, The rotational speed of the opposite side portion of the interlocking member can be made higher than the relative displacement speed between the fixed member and the storage member.

  In the vibration absorbing device, the fixed member has an axial shape extending in a direction parallel to a direction in which the first member and the second member are arranged, and the interlocking member is fixed to the rotation support portion. The interlocking member is preferably supported so as to be rotatable about an axis substantially orthogonal to the axial direction of the member.

  According to this configuration, it is possible to attenuate the vibration in the axial direction of the fixed member by rotating the interlocking member around an axis orthogonal to the axial direction of the fixed member.

  In the vibration absorbing device, it is preferable that the interlocking member and the rotation support portion that supports the interlocking member are respectively arranged at a plurality of positions arranged in the circumferential direction around the fixed member.

  According to this structure, since the several interlocking member and rotation support part are provided with respect to one to-be-fixed member, a bigger damping effect can be acquired.

  In addition, the present invention provides a main body including a traveling body, a cab mounted on the main body, and a mount that absorbs vibration transmitted from the main body to the cab while connecting the main body and the cab. Including the vibration absorbing device as the mount, a fixed member of the vibration absorbing device is fixed to one of the main body and the cab, and a storage member of the vibration absorbing device is fixed to the other A self-propelled working machine is provided.

  Furthermore, the present invention provides a main body including a traveling body, a cab mounted on the main body, and a mount that absorbs vibration transmitted from the main body to the cab while connecting the main body and the cab. The vibration absorbing device according to any one of claims 2 to 4 is included as the mount, and the fixed member is in the posture in which the axial direction of the fixed member of the vibration absorbing device is the vertical direction. A self-propelled working machine is provided, wherein the self-propelled working machine is fixed to any one of the cabs, and a storage member of the vibration absorbing device is fixed to the other.

  According to the present invention, a large attenuation effect can be obtained while maintaining the amplitude.

1 is a right side view of a hydraulic excavator according to an embodiment of the present invention. It is a right view which expands and shows the cab of the hydraulic shovel of FIG. It is side surface sectional drawing of the mount 16 of FIG. It is the IV-IV sectional view taken on the line of FIG. It is side surface sectional drawing which shows the structure of the conventional highly viscous liquid enclosure mount. 6 is a side cross-sectional view showing a liquid-filled suspension according to Patent Document 1. FIG.

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

  FIG. 1 is a right side view of a hydraulic excavator according to an embodiment of the present invention. 2 is an enlarged right side view of the cab of the excavator of FIG. In the following description, description will be made using the front-rear and left-right directions viewed from the operator in the cab 8.

  Referring to FIG. 1, a hydraulic excavator 1 as an example of a construction machine includes a crawler-type lower traveling body 2 and an upper revolving body 3 that is rotatably mounted on the lower traveling body 2.

  The lower traveling body 2 includes a lower frame 4 and a pair of crawlers 5 (one shown in FIG. 1) provided on both the left and right sides of the lower frame 4. Each crawler 5 includes a drive wheel 5a, an idler wheel 5b, and a crawler belt 5c wound around the both wheels 5a and 5b, respectively, and travels according to the circulation operation of the crawler belt 5c. .

  The upper turning body 3 includes a turning frame 6 that is turnably mounted on the lower traveling body 2, a work attachment 7 that is provided on the turning frame 6 so as to be raised and lowered, and a left side of the work attachment 7. And a plurality of mounts 16 (FIG. 2) provided between the cab 8 and the swivel frame 6.

  The work attachment 7 includes a boom 9, an arm 10 pivotally supported at the tip of the boom 9, and a bucket 11 pivotally supported at the tip of the arm 10. . The boom 9 is raised and lowered with respect to the revolving frame 6 according to the expansion and contraction of the boom cylinder 12 provided between the boom 9 and the revolving frame 6. The arm 10 swings with respect to the boom 9 according to the expansion and contraction of the arm cylinder 14 provided between the arm 9 and the boom 9. The bucket 11 swings with respect to the arm 10 in accordance with expansion and contraction of a bucket cylinder 15 provided between the bucket 11 and the arm 10.

  The cab 8 is provided on the left side of the work attachment 7 (boom 9) at the front portion of the revolving frame 6. Specifically, the cab 8 is mounted on a plurality of mounts 16 fixed on the revolving frame 6 as shown in FIG.

  3 is a side sectional view of the mount 16 of FIG. 4 is a cross-sectional view taken along line IV-IV in FIG.

  2 to 4, in the present embodiment, four mounts 16 are provided at front and rear, left and right positions corresponding to the four corners of the cab 8 (only two on the left side are shown in FIG. 2). . Since these mounts 16 all have the same configuration, the configuration of one mount 16 will be described below as an example.

  The mount 16 is provided between the revolving frame 6 and the cab 8 and absorbs vibration transmitted from the revolving frame 6 to the cab 8. Specifically, the mount 16 includes a casing (storage member) 17 fixed to the revolving frame 6, an elastic member 18 provided on the upper portion of the casing 17, and a rigid shaft (fixed member) fixed to the cab 8. 19, a highly viscous liquid (vibration absorbing fluid) 20 stored in the casing 17, and an interlocking mechanism 21 provided in the casing 17.

  The casing 17 is a bottomed container member made of metal or the like. Specifically, the casing 17 according to the present embodiment includes a cylindrical body portion 22, a bottom portion 23 that closes a lower end of the body portion 22, and a flange portion 24 that is folded outward from the upper portion of the body portion 22. It is prepared as one. The casing 17 is inserted into a hole (not shown) formed in the revolving frame 6 from above, and the casing 17 is placed on the revolving frame 6 in a state where the lower surface of the flange portion 24 and the upper surface of the revolving frame 6 are in contact with each other. Fixed.

  The highly viscous liquid 20 is enclosed in the casing 17. Further, the high-viscosity liquid 20 has a viscosity that gives a greater resistance force to a member that moves in the high-viscosity liquid 20 as the moving speed is higher.

  The elastic member 18 is fixed to the inner side surface of the body portion 22 and the upper surface of the flange portion 24 so as to close the upper opening of the body portion 22 in the casing 17. Further, the elastic member 18 is formed with a through hole 25 penetrating vertically along the axis of the body portion 22. The elastic member 18 is fixed not only to the casing 17 but also to a middle portion of the rigid shaft 19 inserted into the through hole 25. Specifically, the elastic member 18 is connected to the rigid shaft 19 so that the lower end portion of the rigid shaft 19 is immersed in the highly viscous liquid 20 in the casing 17, and the relative displacement of the rigid shaft 19 with respect to the casing 17 is reduced. It is configured to be elastically deformable to allow.

  The rigid shaft 19 is a metal shaft that extends in a direction parallel to the direction in which the revolving frame 6 and the cab 8 are arranged, and is disposed coaxially with the body portion 22 of the casing 17. The rigid shaft 19 is attached to the casing 17 so that it can be displaced in the vertical direction and the front-rear and left-right directions while elastically deforming the elastic member 18. Further, at the lower part of the rigid shaft 19, there are a small-diameter portion 26 having a diameter smaller than the diameter of the middle portion of the rigid shaft 19, and a disk portion 27 bulging radially at the lower end of the small-diameter portion 26. The range from the disk part 27 to the middle part of the small diameter part 26 is immersed in the highly viscous liquid 20.

  Four interlocking mechanisms 21 are provided every 90 ° around the rigid shaft 19 while being immersed in the highly viscous liquid 20. Since each interlocking mechanism 21 has the same configuration, the configuration of one interlocking mechanism 21 will be described below.

  The interlocking mechanism 21 is a rotating member (interlocking member) 30 that is connected to the rigid shaft 19 so as to move in the high-viscosity liquid 20 in conjunction with the rigid shaft 19, and the relative movement of the interlocking mechanism 21 as the rigid shaft 19 moves. The movable member 30 can be rotated about a rotation axis (rotation fulcrum) 29 so that at least a part of the rotation member 30 moves in the highly viscous liquid 20 at a speed higher than the speed. A support portion (rotation support portion) 28 that supports the rotation member 30 on the casing 17 is provided. Specifically, the position of the rotation shaft 29 is greater than the distance D1 from the rotation shaft 29 to the connecting portion of the rotation member 30 where the rotation member 30 is connected to the rigid shaft 19. The distance D2 is set so as to increase from the rotation shaft 29 to the portion opposite to the connecting portion.

  The rotation shaft 29 is a metal shaft extending in a direction perpendicular to the axis of the rigid shaft 19. Both ends of the rotation shaft 29 are supported by the support portions 28, and the rotation member 30 is pivotally supported in the middle portion between the support portions 28.

  The proximal end portion of the rotating member 30 is connected to the disk portion 27 of the rigid shaft 19 so as to be driven, while the distal end portion of the rotating member 30 is rotated according to the vertical movement of the proximal end portion. It is a free end that rotates about the axis 29. Specifically, an engaging portion 31 that engages with the disk portion 27 is provided at the base end portion of the rotating member 30. The engaging part 31 has a U-shaped cross-sectional shape in a side view so that the disk part 27 can be sandwiched vertically. Accordingly, the rotating member 30 is rotated up and down around the rotating shaft 29 in accordance with the vertical movement of the disk portion 27.

  Moreover, the range from the said rotating shaft 29 to a free end part among the rotation members 30 is made into the fan-shaped part 32 (refer FIG. 4) which spreads forward. The fan-shaped portion 32 is obtained by dividing the circular cross section of the casing 17 (the body portion 22) in a direction orthogonal to the rigid shaft 19 into four equal parts (equally divided by the number of rotating members 30) by a plane passing through the axis of the rigid shaft 19. It is formed corresponding to the shape of the 1 part. In other words, by combining the shapes of the four fan-shaped portions 32, a shape corresponding to the cross-sectional shape of the casing 17 (body portion 22) is obtained. The tip portion of the fan-shaped portion 32 is formed as a bowl-shaped portion 33 bent upward so that the resistance (force for producing a damping effect) when moving in the highly viscous liquid 20 is increased. It has become.

  The operation of the mount 16 will be described.

  When vertical vibration is generated in the revolving frame 6, the rigid shaft 19 is displaced up and down relative to the casing 17. When the rigid shaft 19 is displaced, the engaging portion 31 moves up and down following the disk portion 27 of the rigid shaft 19, and each rotating member 30 rotates according to the up and down movement of the engaging portion 31. For each rotating member 30, the distance D 1 between the base end portion of the rotating member 30 and the rotating shaft 29 is set to be shorter than the distance D 2 between the free end portion of the rotating member 30 and the rotating shaft 29. Therefore, the free end of the rotating member 30 can be displaced by a displacement amount larger than the displacement amount of the rigid shaft 19. In other words, the free end of the rotating member 30 can be moved in the highly viscous liquid 20 at a speed higher than the actual moving speed of the rigid shaft 19. Accordingly, since the resistance force that the rotating member 30 receives from the high-viscosity liquid 20 can be increased, the effect of attenuating the vibration generated in the turning frame 6 can be further increased.

  As described above, according to the embodiment, the rotating member 30 can be moved in the highly viscous liquid 20 at a speed higher than the relative moving speed between the casing 17 and the rigid shaft 19. A large resistance force can be obtained from the highly viscous liquid 20.

  Therefore, according to the present invention, a large damping effect can be obtained while maintaining the relative displacement amount between the casing 17 and the rigid shaft 19, that is, the amplitude between the revolving frame 6 and the cab 8.

  As in the above-described embodiment, the rotation is performed such that the distance D2 from the rotation shaft 29 to the free end of the rotation member 30 is larger than the distance D1 from the rotation shaft 29 to the base end of the rotation member 30. By setting the position of the moving shaft 29, the rotational speed of the free end portion of the rotational member 30 can be made higher than the relative displacement speed between the rigid shaft 19 and the casing 17.

  According to the configuration in which the support portion 28 supports the rotation member 30 so that the rotation member 30 can rotate about an axis substantially orthogonal to the axial direction of the rigid shaft 19 as in the above-described embodiment, The vibration in the axial direction of the shaft 19 can be damped by opening the rotating member 30 around an axis orthogonal to the axial direction of the rigid shaft 19.

  According to the configuration in which the rotating member 30 and the support portion 28 that supports the rotating member 30 are arranged at a plurality of positions aligned in the circumferential direction around the rigid shaft 19 as in the embodiment, one rigid shaft 19 is provided. On the other hand, since the plurality of interlocking members 30 and the support portion 28 are provided, a greater attenuation effect can be obtained.

1 Excavator (construction machine)
6 Revolving frame 8 Cab 16 Mount 17 Casing (reservoir)
19 Solid shaft (fixed member)
20 High viscosity liquid (vibration absorbing fluid)
21 interlocking mechanism 28 support part (rotation support part)
29 Rotating shaft (Rotating fulcrum)
30 Rotating member (interlocking member)
31 Engaging part 32 Fan part

Claims (6)

A vibration absorbing device for absorbing vibration transmitted between the first member and the second member while connecting the first member and the second member,
A storage member fixed to the first member and capable of enclosing a fluid therein;
A vibration-absorbing fluid that has a viscosity that is enclosed in the storage member and gives a greater resistance to the moving speed of the member moving in the storage member
A fixed member fixed to the second member so as to be displaced together with the second member;
The fixed member and the storage member are connected such that at least a part of the fixed member is immersed in the vibration absorbing fluid in the storage member, and the relative of the fixed member to the storage member is An elastic member capable of elastic deformation so as to allow displacement;
An interlocking member that is immersed in the vibration absorbing fluid and connected to the fixed member so as to move in the vibration absorbing fluid in conjunction with the fixed member;
With the relative movement of the fixed member with respect to the storage member, the interlock member is fixed so that at least a part of the interlock member moves in the vibration absorbing fluid at a speed higher than the relative movement speed. A vibration absorbing device comprising a speed increasing mechanism interlocked with a member. The vibration absorber according to claim 1,
The speed increasing mechanism includes a rotation support portion that supports the interlocking member on the storage member side so that the interlocking member can rotate around a predetermined rotation fulcrum.
The position of the rotation fulcrum is such that the rotation fulcrum sandwiches the rotation fulcrum from the rotation fulcrum, rather than the distance from the rotation fulcrum to the connection portion where the interlocking member is connected to the fixed member. The vibration absorbing device is set so that a distance to a portion opposite to the connecting portion is increased. The vibration absorber according to claim 2,
The fixed member has an axial shape extending in a direction parallel to a direction in which the first member and the second member are arranged;
The said rotation support part supports the said interlocking member so that the said interlocking member can be rotated to the surroundings of the axis | shaft substantially orthogonal to the axial direction of the said to-be-fixed member, The vibration absorption apparatus characterized by the above-mentioned. The vibration absorber according to claim 3.
The vibration absorbing device, wherein the interlocking member and the rotation support portion that supports the interlocking member are arranged at a plurality of positions arranged in the circumferential direction around the fixed member. A main body including a traveling body;
A cab mounted on the main body,
A mount for absorbing vibration transmitted from the main body to the cab while connecting the main body and the cab,
Including the vibration absorbing device according to any one of claims 1 to 4 as the mount;
A self-propelled working machine, wherein a fixed member of the vibration absorbing device is fixed to one of the main body and the cab, and a storage member of the vibration absorbing device is fixed to the other. A main body including a traveling body;
A cab mounted on the main body,
A mount for absorbing vibration transmitted from the main body to the cab while connecting the main body and the cab,
Including the vibration absorbing device according to any one of claims 2 to 4 as the mount;
The fixed member is fixed to one of the main body and the cab in a posture in which the axial direction of the fixed member of the vibration absorbing device is the vertical direction, and the storage member of the vibration absorbing device is fixed to the other Self-propelled work machine characterized by being made.

Images