JP2017048820A - Vibration prevention support structure of work machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a vibration prevention support structure of a work machine capable of being easily assembled.SOLUTION: On a main frame 2 of a work machine 1, provided is a sub-frame 12 mounted through a vibration prevention member 11 such as vibration prevention rubber and formed into a quadrangle shape in a plan view, and on the sub-frame 12, vibration prevention object equipment 50 such as a drive source 51 or a work machine body 52 is mounted. The sub-frame 12 with the vibration prevention object equipment 50 mounted thereon is supported at three or more supporting points P, and at least two corner parts (in an illustrated example, all of four corner parts) of the sub-frame 12 is covered by a stopper member 13 (or 13') detachably attached to the main frame 2, thereby regulating a swing width of the sub-frame 12 in vertical and horizontal directions.SELECTED DRAWING: Figure 1

Description

  The present invention relates to an anti-vibration support structure for a work machine. For example, a work source such as an engine or motor, a generator body, a compressor body, or the like, such as an engine-driven work machine or a motor-driven work machine. In a work machine equipped with a component such as a main body that requires anti-vibration measures (referred to as “vibration-proof target device” in the present invention), the vibration-proof target device is placed on a main frame that forms the base of the work machine. The present invention relates to an anti-vibration support structure that supports an anti-vibration member such as an anti-vibration rubber.

  In a package type work machine that houses a work machine body such as a compressor body or a generator body together with a drive source such as an engine or motor in a soundproof box, the drive source or work is placed on the main frame that forms the bottom of the soundproof box. If equipment that generates vibration, such as the main body of the machine, is directly installed, the vibration generated by these equipment is transmitted to the soundproof box and causes noise.

  For this reason, these work machines generally employ a vibration-proof support structure in which a vibration-proof target device such as a drive source or work machine body is mounted on a main frame via a vibration-proof member such as a vibration-proof rubber. .

  In addition, since the equipment placed on the main frame by the anti-vibration member is mounted in a swingable state on the main frame, a large vibration is applied to the entire work machine during transportation and installation work. If the vibration-proof target device such as the drive source or work machine body swings more than necessary, it will come into contact with or collide with the inner wall of the soundproof box or other devices housed in the soundproof box. May damage the vibration-proof target device itself, or the wall surface of the soundproof box and the devices that have contacted or collided with the vibration-proof target device.

  For this reason, a stopper member is provided for restricting the swing width of the supported device for vibration isolation so that the device for vibration isolation supported on the main frame does not swing more than necessary via the vibration isolation member. Anti-vibration support structures have also been proposed.

  As an example of an anti-vibration support structure provided with such a stopper member, in Patent Document 1, a beam 231 is provided on a main frame 230, and anti-vibration mounts 232 and 233 are erected on the beam 231 so as to prevent vibration. The top plates 232b and 233b are attached to the bases 232 and 233, and the encircling type rocking restriction members 232c and 233c are disposed on the top surfaces of the top plates 232b and 233b, and the drive source 250 and the work machine main body (not shown). By mounting the attached mounting leg 252 on the vibration isolating member 290 accommodated in the surrounding rocking restriction members 232c and 233c, the surrounding legs 252c and 233c move the mounting leg 252 in the horizontal direction. By restricting the movement, the first stopper member 292 and the second stopper members 232e and 233e are provided on the surrounding swing restricting members 232c and 233c. Configuration the vibration isolating support structure so that it can also restrict the movement width in the vertical direction of the attachment leg 252 is described (see FIG. 13).

  Further, in Patent Document 2, vibration isolation tables 310 and 311 having longitudinal directions perpendicular to their central axes are provided in the drive source 302a and the work machine main body 302, respectively. Both ends are fixed on the main frame 301 via vibration isolating rubber 309, and an engagement hole 321 is provided in the vicinity of the center of the vibration isolation tables 310 and 311. A predetermined gap is provided in the engagement hole 321. By attaching the stopper member 322 having the engaging convex piece 323 to be inserted to the main frame 301, the vibration isolator 310, by the engagement between the engaging convex piece 323 of the stopper member 322 and the inner peripheral edge of the engaging hole 321, An anti-vibration support structure that can define the swing width of 311 is disclosed.

Japanese Patent No. 4583136 No. 04-13426

  In the anti-vibration support structure equipped in the working machine described in Patent Document 1, the surrounding swing regulation members 232c and 233c are provided, the mounting legs 252 are accommodated in the surround swing regulation members 232c and 233c, and the first By providing the first stopper member 292 and the second stopper members 232e and 233e, not only the horizontal movement of the mounting leg 252 provided in the drive source 250 but also the movement in the vertical direction can be restricted. ing.

  However, in the structure described in Patent Document 1, the beam 231 provided on the main frame 230, the anti-vibration bases 232 and 233, the encircling swing regulating members 232c and 233c, the first stopper member 292, the second stopper members 232e and 233e, and the like. There are many types and number of parts that make up the anti-vibration support structure, and it is necessary to assemble them by welding or bolting, etc., and there are many man-hours for manufacturing the anti-vibration support structure, and assembly requires a lot of time and labor. It becomes.

  In the work machine described in Patent Document 1, the drive source 250 and the work machine main body (not shown) are coupled in the axial direction, the two mounting legs 252 provided on the drive source 250, and the work machine main body (not shown). Enclosed swing restricting members 232c and 233c provided on the four anti-vibration mounts 232 and 233 provided on the beam 231 of the main frame 230 with the lower ends of the two support legs (not shown) provided on the main frame 230. The structure fitted to each of these is adopted.

  Therefore, when the drive source 250 and the work machine main body (not shown) are mounted on the main frame 230, the drive source 250 and the work machine main body are combined and lifted by a crane or the like, on the upper surface of the main frame 230, and It is necessary to accurately lower the lower end portions of all the mounting legs within the four encircling rocking restriction members 232c and 233c.

  In addition, the clearance between the inner surfaces of the surrounding swing restricting members 232c and 233c and the mounting leg 252 is provided with only a slight clearance for restricting the swinging width, and the surrounding swing restricting even with a slight positional deviation. Since the mounting legs 252 cannot be fitted into the members 232c and 233c, careful work is required, so that not only the workability is bad, but also the mounting legs 252 are surrounded when the drive source 250 and the work machine main body are lowered. If the shape swinging members 232c and 233c are brought into contact with each other, they may be damaged or deformed.

  Furthermore, in order to restrict the upward movement of the drive source 250 and the work machine main body, after the drive source 250 and the work machine main body are mounted, the upward movement is further moved into the encircling swing regulating member 232c. It is necessary to attach the first stopper member 292 to be regulated. Also in this respect, the number of assembling steps is large and the workability is poor.

  In the anti-vibration support structure introduced as Patent Document 2 described above, as in the anti-vibration support structure introduced as Patent Document 1, the drive source 302a and the work machine main body 302 are supported in a state of being anti-vibrated, and the horizontal and vertical directions are supported. Although the movement of the direction can be restricted, the engagement hole 321 provided in the anti-vibration bases 310 and 311 in order to restrict the swing width of the anti-vibration bases 310 and 311 in the structure described in Patent Document 2. The gap between the engaging projections 323 provided on the stopper member 322 is formed to be relatively small.

  In addition, in the configuration described in Patent Document 2, since the stopper member 322 is disposed immediately below the vibration isolation tables 310 and 311, when attaching the stopper member 322, the hand is directly below the vibration isolation tables 310 and 311. In a position where it is difficult to see the work, it is difficult to accurately insert the engagement convex piece 323 provided on the stopper member 322 into the engagement hole 321 and to bolt the stopper member 322 onto the main frame 301. Necessary and poor workability during assembly.

  In the above description, the vibration isolating support structure in the package type work machine in which necessary equipment is housed in the soundproof box has been described as the anti-vibration support structure, but the same problem is not limited to the package type work machine. This is a problem that is common to all work machines that support devices requiring anti-vibration measures on a frame (main frame) via an anti-vibration member.

  Therefore, the present invention was made to eliminate the above-mentioned drawbacks of the prior art, and it is possible to use a working machine that has a relatively simple structure, can use common members, and is easy to assemble. An object is to provide a vibration-proof support structure.

  Hereinafter, means for solving the problem will be described together with reference numerals used in the embodiment for carrying out the invention. This code is used to clarify the correspondence between the description of the scope of claims and the description of the mode for carrying out the invention. Needless to say, it is used in a limited manner for the interpretation of the technical scope of the present invention. It is not a thing.

In order to achieve the above object, the anti-vibration support structure 10 for a work machine according to the present invention includes:
A power source 51 such as an engine or a motor, a compressor body driven by the drive source 51, power generation In the anti-vibration support structure 10 for a work machine that supports the anti-vibration target device 50 that requires anti-vibration measures, such as the work machine main body 52 such as the machine main body, via the anti-vibration member 11 such as anti-vibration rubber
A subframe 12 having a substantially rectangular shape in plan view placed on the main frame 2;
Anti-vibration members 11 that respectively support three or more support points P provided on the bottom surface of the sub-frame 12 on the main frame 2, and
A stopper member 13 (or 13 ') is provided that is detachably attached to the main frame 2 and covers at least two corners of the sub frame 12 to restrict the swinging width of the sub frame. (Claim 1).

As the stopper member 13,
A side plate 132 formed in a substantially L shape in plan view, a bottom plate 131 that blocks between the lower ends of the side plates 132, a flange portion 135 that protrudes outward from the lower end of the side plates 132, and an upper end of the side plate 132 are installed. The top plate 133 is provided.
A thing provided with the accommodation space 134 which accommodates the corner | angular part of the said sub-frame 12 defined by the said bottom plate 131, the said side plate 132, and the said top plate 133 can be used (refer Claim 2: FIG. 7). ).

As the stopper member,
A side plate 132 ′ formed in a substantially L shape in plan view, a flange portion 135 ′ projecting outward from a lower end of the side plate 132 ′, and a top plate 133 ′ laid between the upper ends of the side plate 132 ′ are provided. In this case, by accommodating the flange portion 135 ′ on the upper surface of the main frame 2, the accommodation space 134 ′ for accommodating the corner portion of the sub-frame 12 becomes the main frame 2. And a space defined by the side plate 132 ′ and the top plate 133 ′ of the stopper member 13 ′ (Claim 3: see FIG. 8).

  Each of the support points P can be supported by different vibration isolation members. Preferably, the subframe 12 on which the vibration isolation target device 50 is mounted is supported with substantially the same load. The supporting point P is provided at a position where it can be formed, and the anti-vibration member 11 having the same structure having a suitable load corresponding to the load at the supporting point P is provided as the anti-vibration member 11 provided at each supporting point P. Preferred (claim 4).

  In this case, it is preferable to set the number of the support points P so that the load at each of the support points P is equal to or less than a predetermined load.

  Further, the sub-frame 12 is formed in a box shape having a top plate 121 having a substantially rectangular shape in plan view, and a side wall 122 projecting downward from the periphery of the top plate 121 and having a recess 123 opening downward. It is preferable that the vibration isolating member 11 is disposed in the concave portion 123 of the subframe 12 (Claim 6).

  The stopper member 13 (or 13 ') can be attached to all four corners of the subframe 12 (see claim 7: FIG. 2).

  Further, the stopper member 13 (or 13 ') may be attached to two corners that form a diagonal of the subframe 12 (see claim 8: FIG. 11).

  Furthermore, the stopper member 13 (or 13 ') may be provided at two corners at both ends of one side of the subframe 12 (Claim 9: FIG. 12).

  With the configuration of the present invention described above, the following significant effects can be obtained in the vibration isolating support structure 10 of the present invention.

  By constructing the anti-vibration support structure 10 with a relatively small number of parts such as the sub-frame 12, the anti-vibration member 11, and the stopper member 13, not only the structure is simple but also the attachment of the stopper member 13 is possible. The anti-vibration support structure 10 having excellent workability at the time of assembly is provided because it can be performed on the main frame 2 at the positions of the corners of 12 and the visibility at hand during work and workability are good. I was able to.

  As the stopper member 13, a side plate 132 formed in a substantially L shape in plan view, a bottom plate 131 that closes between the lower ends of the side plates 132, a flange portion 135 that protrudes outward from the lower ends of the side plates 132, and the side plates In an example using a structure having a top plate 133 installed between the upper ends of 132 (see FIG. 7), the stopper member 13 is not only easily attached to the main frame 2 but also provided on the stopper member 13. As a result of the bottom plate 131 restricting the downward movement of the subframe 12, the upper surface of the main frame 2 at the position where it collides with the lower end portion of the subframe 12 can be reinforced by the bottom plate 131 of the stopper member 13.

  On the other hand, in the example in which the stopper member 13 ′ (see FIG. 8) having a structure not including the bottom plate 131 is used as the stopper member, the stopper member 13 described with reference to FIG. In addition to the easy attachment of the stopper member 13, unlike the stopper member 13 described with reference to FIG. 7, the bottom plate 131 is not provided, so that the thickness of the bottom plate 131 and the height of the subframe 12 are kept low. This allows further downsizing of the overall device configuration.

  It should be noted that, in working machines such as engine-driven work machines and motor-driven work machines, drive sources such as engines and motors and work machine bodies such as compressor bodies and generator bodies are usually different manufacturers (manufacturers). ), And at the manufacturing stage, each manufacturer independently installs the mounting legs.

  For this reason, in a configuration in which the input shaft of the work implement body is connected to the output shaft of the drive source and both are connected in the axial direction, the mounting position of the mounting legs is not well balanced, and the drive source and work implement main body Due to the difference in weight, etc., the load applied to the mounting leg provided on the drive source and the load applied to the mounting leg provided on the work equipment main body are significantly different. It will be greatly different in the position.

  Here, the range of load that can be applied to each type of anti-vibration member such as anti-vibration rubber is determined, and even if it is used in a state where a large or small load is applied to the applicable load, sufficient anti-vibration components can be used. Does not demonstrate vibration performance.

  Therefore, the anti-vibration support configurations described in the above-mentioned Patent Document 1 and Patent Document 2 are compatible with the anti-vibration member that supports the mounting leg of the drive source and the anti-vibration member that supports the mounting leg of the work machine body, respectively. It is necessary to use anti-vibration members with different loads, and at least two types of anti-vibration members are required (four types if the load applied to the mounting legs on the drive source and work implement body is different). Since it is necessary to install the vibration isolating members having different positions at the correct positions, the installation work and the inspection work after the installation become complicated.

  On the other hand, in the anti-vibration support structure of the present invention, by placing the entire anti-vibration target device 50 on the sub-frame 12, the weight and center of gravity of each device such as the drive source 51 and the work machine main body 52 can be adjusted. Even if there is a difference or the like, it is possible to determine the support point P by regarding the entire subframe 12 in which the anti-vibration target device 50 is mounted as one device.

  As a result, by providing the support point P at a position where the subframe 12 can be supported with substantially the same load, each support point P can be supported by the vibration isolating member 11 having the same structure and having a common load. This makes it possible to reduce the manufacturing cost by making the parts common, as well as making the installation work easier and the inspection work after assembly easier than attaching different vibration isolation members 11 for each support point P. It becomes.

  Further, since the load at each support point P is substantially the same and each support point P is supported by the vibration isolating member 11 having the same structure, the degree of collapse of the vibration isolating member 11 supporting each support point P becomes constant. Since the subframe 12 is arranged substantially parallel to the main frame 2 without being inclined, it is not necessary to change the height of the stopper members 13 and 13 ′ attached to the corners of the subframe 12, The stopper members 13 and 13 ′ to be used can have a common structure, and a simple structure that does not require a function such as height adjustment can be achieved.

  In particular, in the configuration in which the number of the support points P is set so that the load at each of the support points P is equal to or less than a predetermined load, the vibration-proof target device 50 placed on the subframe 12 is changed. Even if the total weight applied to the subframe 12 varies, the load applied to each support point P can be reduced to a predetermined value or less by adjusting the number of support points P. For example, even if the generator and the compressor, and the large machine and the small machine are different, it is possible to share the vibration isolation member 11 to be used (use the vibration isolation member with the same conforming load). The production cost can be reduced.

  The sub-frame 12 is formed in a box shape having a substantially rectangular top plate 121 in a plan view, and a side wall 122 projecting downward from the periphery of the top plate 121 and having a recess 123 opening downward, In the configuration in which the vibration isolating member 11 is disposed in the concave portion 123 of the subframe 12, the height from the upper surface of the main frame 2 to the top plate 121 of the subframe 12 can be increased while improving the strength of the subframe 12. As a result, the overall size of the device could be reduced.

  In the anti-vibration support structure 10 of the present invention configured as described above, it is preferable that the stopper member 13 is provided at all four corners of the subframe 12 as shown in FIG. However, the present invention is not limited to this configuration, and as shown in FIG. 11, stopper members 13 and 13 ′ may be provided at least at the two corners forming the diagonal of the subframe 12. It is possible to restrict the swing of the subframe 12 in the horizontal direction and the vertical direction within a predetermined width.

  Furthermore, when it is only necessary to restrict the swing in the three-dimensional direction only on one side of the subframe 12, as shown in FIG. 12, the stopper member 13 is provided only at two corners at both ends of the subframe 12. Even with the configuration in which the sub-frame 12 is provided, it is possible to add restrictions necessary for the swinging of the subframe 12.

The perspective view of the working machine provided with the vibration proof support structure of this invention. The top view of the working machine provided with the vibration proof support structure of this invention. The side view of the working machine provided with the vibration proof support structure of this invention. The enlarged plan view of the engaging part of a subframe and a stopper member. The enlarged front view of the engaging part of a sub-frame and a stopper member. The enlarged front view of the engaging part of a subframe and a stopper member (modification). The perspective view of a stopper member. The perspective view of a stopper member (modification). It is explanatory drawing which shows an example of the position determination method of a support point, (A) shows the case where four places and (B) provide three places. Explanatory drawing which shows another example of the position determination method of a support point. The top view which shows the example of a change of the attachment position of a stopper member. The top view which shows the example of a change of the attachment position of a stopper member. Explanatory drawing of the conventional anti-vibration support structure (corresponding to FIG. 3 of Patent Document 1). Explanatory drawing of the conventional anti-vibration support structure (corresponding to FIG. 1 of Patent Document 2).

  Hereinafter, the vibration isolating support structure 10 of the work machine 1 according to the present invention will be described with reference to the accompanying drawings.

  In FIG. 1, the perspective view of the working machine 1 provided with the anti-vibration support structure 10 of this invention is shown.

  In the illustrated example, the work machine 1 is a motor-driven compressor including a motor 51 as a drive source and a compressor body 52 driven by the motor 51. The drive source 51 such as a motor or the work machine body. 52. Other components are housed in a soundproof box.

  As shown in FIG. 3, the soundproof box has a bottom surface constituted by a main frame 2 that is a base for mounting the components of the work machine 1, and the components are mounted on the main frame 2. In this state, the upper part is covered with the bonnet 3 that forms the side wall of the soundproof box and the top plate, so that leakage of noise to the outside of the machine is prevented.

  In addition, in the perspective view shown in FIG. 1, the state which removed the above-mentioned bonnet 3 is displayed for convenience of explanation.

  In the embodiment shown in FIG. 1 in which the anti-vibration support structure 10 of the present invention is applied to the work machine 1 that is a motor-driven compressor, as an example, the compressor is mounted on a portal-type gantry 30 that is disposed so as to straddle the motor 51. The main body 52 is placed, the motor 51 and the compressor main body 52 are arranged vertically, and a pulley belt 55 that is common to the pulley 53 attached to the output shaft of the motor 51 and the pulley 54 attached to the input shaft of the compressor main body 52. The compressor main body 52 can be driven by the motor 51.

  The arrangement of the drive source 51 and the work machine main body 52 is not limited to the illustrated example. For example, the drive source 51 is directly connected to the motor housing or the engine flywheel housing as the drive source 51. And the work machine main body 52 may be integrated, and the drive source 51 and the work machine main body 52 are arranged on the same axis, and the input of the work machine main body 52 is directly input to the output shaft of the drive source 51. A structure in which the shafts are connected may be used. Further, the working machine main body 52 may be arranged on the side of the driving source 51 instead of the illustrated configuration in which the driving source 51 and the working machine main body 52 are arranged vertically. good.

  In the configuration of the working machine 1 (motor-driven compressor) described above, the components (anti-vibration target device 50) that require anti-vibration measures such as the drive source 51 and the compressor main body 52 that constitute the working machine 1 are It is placed on the main frame 2 described above via the anti-vibration support structure 10 of the invention, whereby vibrations generated in the drive source 51, the work machine main body 52, etc. are transmitted to the main frame 2 and the bonnet 3. It is prevented.

  The anti-vibration support structure 10 of the present invention is placed on the main frame 2 described above, and includes a subframe 12 on which a vibration-proof target device 50 including a drive source 51, a work machine main body 52, and these accessory devices is mounted. , A vibration isolating member 11 that supports the bottom surface of the subframe 12 on the main frame 2 at three or more support points P, and a main body 2 that is detachably attached. The stopper member 13 (or 13 ′) covers the corner portion and restricts its movement.

  The sub-frame 12 includes a driving source 51 such as an engine and a motor, a working machine main body 52 such as a compressor main body and a generator main body driven by the driving source 51, and accessory devices such as an air filter 56 and an oil. It consists of a filter (not shown), auxiliary devices (not shown) such as various control devices, an intake pipe 57 for connecting the components, a control pipe (not shown), a discharge pipe (not shown), etc. This is a base for collectively mounting the vibration-proof target devices 50, and is formed in a substantially rectangular shape in plan view as shown in FIG.

  In the illustrated embodiment, the sub-frame 12 is provided with a recess 123 that opens downward, and includes a top plate 121 that is rectangular in plan view and a side wall 122 that protrudes downward from the periphery of the top plate 121. By forming it into a box shape (see FIGS. 1, 3, 5 and 6), it is possible to obtain a strength capable of mounting the above-described vibration-proof target device 50, and to provide a vibration-proof member to be described later in the recess 123. 11 can be accommodated.

  In addition, the height of the side wall 122 of the subframe 12 is set so that the subframe 12 on which the antivibration target device 50 is mounted is set so that the vibration isolation member 11 is housed in the recess 123 as described above. The main frame 2 is formed with the lower end of the side wall 122 of the sub-frame 12 at a state where the work machine 1 is stopped. Or a bottom plate 131 of a stopper member 13 to be described later so as to be separated by a predetermined swing allowable distance a (see FIGS. 5 and 6).

  The sub-frame 12 described above is configured such that a support point P provided at a predetermined position on the bottom surface thereof is supported by the vibration isolation member 11 and placed on the main frame 2.

  As the vibration isolating member 11, various known vibration isolating members such as an anti-vibration rubber and an anti-vibration spring can be used. In this embodiment, a substantially cylindrical anti-vibration rubber called a round anti-vibration rubber is used. The anti-vibration rubber 11 is mounted on the main frame 2, and the bolt 111 protruding from the upper end of the anti-vibration rubber 11 is inserted into the bolt hole provided at the support point P of the top plate 121 of the sub frame 12 and the sub frame 12. The sub-frame 12 is mounted on the main frame 2 in a state of being supported by the anti-vibration rubber 11 at the support point P by screwing the nut 112 onto the bolt 111 protruding to the upper surface side of the top plate 121 (see FIG. (See FIGS. 4-6).

  The above-described support point P provided on the bottom surface of the subframe 12 supported by the vibration isolation member 11 causes the subframe 12 in a state in which the vibration isolation target device 50 is placed to be substantially from the bottom surface side of the subframe 12. It is preferable to provide it at a position where it can be supported by the same load.

  As an example, such determination of the support point P is performed within a circle centered on the center of gravity of the subframe 12 with the image stabilization target device 50 placed thereon, as shown in FIGS. 9 (A) and 9 (B). Polygons that touch each other (the example in FIG. 9A is a square or a rectangle, the regular triangle in the example in FIG. 9B) is provided on the anti-vibration member 11 that supports each support point P by providing a support point P at each corner. It is possible to make the applied load the same.

  In addition, although FIG. 9 (A) demonstrated an example of the determination method of the support point P in the case of providing four support points P in FIG. 9 (B) and three support points P, it is assumed that five or more support points P are provided. In this case, the support points P may be provided at each corner portion of a regular pentagon or more inscribed in a circle centered on the center of gravity.

Further, the center of gravity of the sub-frame 12 in a state where the anti-vibration target device 50 is placed is at a position deviated with respect to the center of the sub-frame 12 (a point where diagonal lines cross), and FIGS. As described with reference to FIG. 10, as an example, when all the support points P cannot be provided at positions equidistant from the center of gravity, as shown in FIG. _A support point P (P _A ) provided on the left side of the paper in FIG. 10 and two support points P (P _B , P _C ) provided on the end side (right side of the paper in FIG. 10) located near the center of gravity. so as to support the sub-frame in a total of three locations, and a line passing through the support point P _a and the center of gravity, the line through the supporting point P _B and P _C are orthogonal at an intersection X, and, from the intersection X to the center of gravity the distance alpha of, distance to the supporting point P _a from the center of gravity beta is, α: β = 1: 2, and the further supporting points A _{position B} and the supporting point _{P C} is composed of the intersection point X and equidistant gamma, three support points _{P (P A, P B,} P C) may be provided, the sub-frame 12, three or more If the support point P is provided and the support point P at which the load applied to the vibration isolating member 11 supporting each support point P is substantially the same can be obtained, only the position described with reference to FIGS. Instead, the support point P can take various arrangements.

  As described above, the corners of the subframe 12 supported by the vibration isolation member 11 at three or more support points P are covered by the stopper members 13 and 13 ′ that are detachably mounted on the main frame 2. Thus, the sub-frame 12 is configured not to swing beyond a predetermined swing width.

  The stopper members 13 and 13 ′ are configured to be detachably mounted on the main frame 2 by a method such as bolting in a state in which the target corner portion of the subframe 12 is covered. In the example shown in FIG. 7, the stopper member 13 includes a side plate 132 formed in a substantially L shape in plan view, a bottom plate 131 that closes the lower end of the side plate 132, and a flange portion 135 that protrudes outward from the lower end of the side plate 132. , And a structure having a top plate 133 installed between the upper ends of the side plates 132. With this structure, a sub-plate is formed in the space defined by the bottom plate 131, the side plates 132, and the top plate 133. An accommodation space 134 for accommodating a corner portion of the frame 12 is formed.

  Accordingly, the stopper member 13 is fixed to the main frame 2 through the bolt hole 136 provided in the flange portion 135 in a state where one of the corner portions of the sub frame 12 is accommodated in the accommodation space 134. The range of movement of the corners of the frame 12 can be restricted.

  In place of the configuration shown in FIG. 7, this stopper member 13 is not provided with a configuration corresponding to the bottom plate 131 provided on the stopper member 13 shown in FIG. 7, as shown in FIG. In this configuration, when the stopper member 13 'is attached to the upper surface of the main frame 2, the upper surface of the main frame 2 and the space defined by the side plate 132' and the top plate 133 'of the stopper member 13' An accommodation space 134 ′ for accommodating a corner portion of the subframe 12 is formed.

  As shown in FIG. 4, the stopper members 13 and 13 ′ have a predetermined swing allowable distance c between the inner surface of the side plate 132 of the stopper members 13 and 13 ′ and the outer surface of the side wall 122 of the subframe 12. Install on the main frame 2 as shown.

  Further, when the stopper member 13 having the structure shown in FIG. 7 is used, the vibration isolating member 11 is loaded, that is, the vibration isolating member 11 is crushed by the supporting load, as shown in FIG. In this way, a predetermined swing allowable distance a is formed between the lower end of the side wall 122 of the subframe 12 and the upper surface of the bottom plate 131 of the stopper member 13, and the upper surface of the top plate 121 of the subframe 12 and the lower surface of the top plate 133 of the stopper member 13. The height of the stopper member 13 and the height of the side wall 122 of the subframe 12 are designed so that a predetermined swing allowable interval b is formed therebetween.

  When the stopper member 13 ′ having the structure shown in FIG. 8 is used, in the stopper member 13 described with reference to FIG. 7, the upper surface of the bottom plate 131 of the stopper member 13 and the side wall 122 of the subframe 12 are used. Whereas the aforementioned swing allowable distance a is provided between the lower ends (see FIG. 5), when the stopper member 13 ′ having the structure shown in FIG. 8 is used, the upper surface of the main frame 2 and the subframe 12 are used. The above-described swing allowable distance a can be provided between the lower ends of the side walls 122 (see FIG. 6), and compared with the case where the stopper member 13 of FIG. The overall height of the vibration support structure 10 can be kept low.

  Note that these swing allowable intervals a to c are such that when the subframe 12 supported by the vibration isolation member 11 swings, the vibration isolation target device 50 mounted on the subframe 12 has a hood of a soundproof box. 3 is required to be dimensioned so as not to collide with the inner wall or other equipment accommodated in the soundproof box. In this embodiment, a cooling fan (not shown) provided in the drive source 51 is used. ) And the fan shroud (not shown) attached to the soundproof box that covers the periphery of the cooling fan, the allowable swing range a to c is set within a range in which the cooling fan does not contact the fan shroud. Set.

  The stopper members 13, 13 ′ configured as described above are attached to at least two of the four corners of the subframe 12. Preferably, as shown in FIG. Attach to all corners.

  However, as shown in FIG. 11, the stopper members 13 and 13 ′ are attached to the two corner portions formed at the diagonal positions among the four corner portions provided in the sub frame 12. Any swing width in the horizontal and vertical directions can be regulated.

  If only one side of the subframe 12 (one side on the right side of the paper in the illustrated example) needs to be controlled in the horizontal and vertical swing widths, as shown in FIG. The stopper members 13 and 13 ′ may be attached to the two corners at both ends.

  In the configuration shown in FIG. 12, the lower end of the side wall 122 of the subframe 12 is connected to the mainframe 2 in the downward direction of the subframe 12 even on the corner portion where the stopper members 13 and 13 ′ are not attached. Regulated by contact.

[Action etc.]
In the anti-vibration support structure 10 of the present invention described above, the upward swing of the subframe 12 is restricted by the upper surface of the subframe 12 coming into contact with the lower surface of the top plate 133 of the stopper members 13 and 13 ′. The downward swing of the subframe 12 is caused by the contact between the lower end of the side wall 122 of the subframe 12 and the upper surface of the bottom plate 131 of the stopper member 13 (see FIGS. 5 and 7), or the lower end of the side wall 122 of the subframe 12 and the main frame. Further, the horizontal swing of the subframe 12 is restricted by contact with the upper surface of the frame 2 (see FIGS. 6 and 8), and the side wall 122 of the corner portion of the subframe 12 and the side plates 132 of the stopper members 13 and 13 ′. , 132 ′, and as a result, the subframe 12 cannot swing beyond the allowable swing intervals a to c shown in FIGS. Swing width of 2 in the horizontal direction and the vertical direction is restricted by the stopper member 13, 13 'described above.

  As a result, it is possible to prevent the vibration generated in the vibration-proof target device 50 from being transmitted to the main frame 2, the hood 3, and the like, and the sub-frame 12 does not swing beyond the swing allowable interval a to c. Therefore, the damage caused by the vibration-proof target member 50 colliding with the inner wall of the hood 3 of the soundproof box or other equipment accommodated in the soundproof box can be prevented.

  Moreover, in the above-described anti-vibration support structure 10 of the present invention, the anti-vibration target devices 50 such as the drive source 51 and the work machine main body 52 are collectively mounted on the sub-frame 12. The number and arrangement of the support points P that support the subframe 12 can be determined from the center of gravity and the total weight of the subframe 12 in a state in which the vibration-proof target device 50 is placed on the device. The load applied to P can be made substantially the same.

  As a result, one type of vibration isolating member 11 having the same conforming load can be used in common as the vibration isolating member 11 such as an anti-vibration rubber for supporting each support point P.

  In addition, the load at each support point P is substantially the same, and the same type of vibration isolating member 11 is used, so that the amount of deflection of each vibration isolating member 11 becomes uniform, and the top of the subframe 12 from the upper surface of the main frame 2 becomes uniform. The distance to the surface of the plate 121 is the same at any position on the top plate 121 of the subframe 12.

  As a result, only one type of stopper member 13, 13 'to be attached to the corner of the subframe 12 need be provided, and there is no need to provide a plurality of types of stopper members 13, 13' having different dimensions.

  In view of the above, in the anti-vibration support structure 10 of the present invention, the anti-vibration member 11 and the stopper members 13 and 13 ′ can be reduced to one type, and the assembly work is unified and the workability is improved by the common use of parts. In addition to improving, inspection work after assembly is easy, and manufacturing costs can be reduced by simplifying parts procurement and parts management.

  In addition, as described in the prior art, in the configuration in which the mounting legs provided on the drive source and the work machine are supported by the vibration isolation members, the drive source side and the work machine side are different due to the difference in weight between the drive source and the work machine. It is necessary to use different types of anti-vibration members. As a result, due to differences in the shape and material of the anti-vibration members, the load factor with respect to the applicable load, etc. As a result, it has been necessary to observe the state of each vibration isolation member and replace it individually. However, in the configuration of the present invention, the vibration isolation member 11 to be used can be limited to one type and each vibration isolation member can be used. Since the load applied to the vibration member 11 is also the same, it is difficult for variations in the aging and deterioration states to occur, and the maintenance interval is optimized, such as replacing all the vibration isolation members 11 every predetermined usage time. Can do.

  As described above, in the anti-vibration support structure 10 of the present invention, since the anti-vibration member 11 is disposed on the bottom side of the sub-frame 12, even when the anti-vibration rubber is used as the anti-vibration member 11, Since the subframe 12 serves as an umbrella, even if fuel or oil leaks from the drive source 51 or the work machine main body 52, it is possible to prevent direct contact with the anti-vibration rubber. It is also possible to prevent the occurrence of deterioration of the anti-vibration rubber due to contact with oils and fats.

  In particular, in the configuration in which the subframe 12 is formed in a box shape having a top plate 121 and a side wall 122 projecting downward from the peripheral edge of the top plate 121 and having a recess 123 that opens downward, Not only can the strength be increased, but the vibration isolating member 11 is accommodated in the recess 123 of the sub-frame 12 so that the overall structure of the anti-vibration support structure 10 and thus the work machine equipped with such an anti-vibration support structure can be obtained. The overall height could be kept low, and the overall size of the device could be reduced.

DESCRIPTION OF SYMBOLS 1 Work implement 2 Main frame 3 Bonnet 10 Anti-vibration support structure 11 Anti-vibration member (anti-vibration rubber)
111 Bolt 112 Nut 12 Subframe 121 Top plate 122 Side wall 123 Recess 13, 13 'Stopper member 131 Bottom plate 132, 132' Side plate 133, 133 'Top plate 134, 134' Housing space 135, 135 'Flange portion 136, 136' Bolt Hole 30 Base 50 Anti-vibration target device 51 Drive source (motor)
52 Work machine body (Compressor body)
53, 54 Pulley 55 Pulley belt 56 Air filter 57 Intake pipe P Support point (subframe)
a to c Allowable swing 230 Main frame 231 Beam 232, 233 Anti-vibration base 232b, 233b Top plate 232c, 233c Enclosed swing restricting member 232e, 233e Second stopper member 250 Drive source 252 Mounting leg 290 Anti-vibration member 292 First stopper member 301 Main frame 302a Drive source 302 Work machine main body 308 Mounting leg 309 Anti-vibration rubber 310, 311 Anti-vibration table 321 Engagement hole 322 Stopper member 323 Engaging protrusion

Claims (9)

Anti-vibration of the work machine, which supports the anti-vibration target equipment that requires anti-vibration measures on the main frame of the work machine provided with the main frame as a base on which the component equipment is placed via the anti-vibration member In the support structure,
A sub-frame having a substantially rectangular shape in plan view placed on the main frame;
Anti-vibration members for supporting at least three support points on the bottom surface of the sub-frame on the main frame, and
An anti-vibration support structure for a working machine, comprising a stopper member that is detachably attached to the main frame and that covers at least two corners of the sub frame to restrict a swinging width of the sub frame. . The stopper member is
A side plate formed in a substantially L shape in plan view, a bottom plate closing between the lower ends of the side plates, a flange portion projecting outward from the lower ends of the side plates, and a top plate laid between the upper ends of the side plates;
The anti-vibration support structure for a working machine according to claim 1, further comprising an accommodation space for accommodating a corner portion of the subframe, which is defined by the bottom plate, the side plate, and the top plate. The stopper member is
A side plate formed in a substantially L shape in plan view, a flange portion projecting outward from the lower end of the side plate, and a top plate laid between the upper ends of the side plates;
By mounting and fixing the flange portion on the upper surface of the main frame, an accommodation space for accommodating a corner portion of the subframe is defined by the upper surface of the main frame, the side plate and the top plate of the stopper member. 2. The anti-vibration support structure for a working machine according to claim 1, wherein the anti-vibration support structure is formed in a defined space. The supporting points are respectively provided at positions where the sub-frames on which the vibration-proof target devices are placed can be supported with substantially the same load,
The anti-vibration member having the same structure and having a conforming load corresponding to the load at the support point is provided as the anti-vibration member provided at each support point. Anti-vibration support structure for work equipment.   The anti-vibration support structure for a working machine according to claim 4, wherein the number of the support points is set so that a load at each of the support points is equal to or less than a predetermined load. The sub-frame is formed in a box shape having a top plate having a substantially rectangular shape in plan view and a side wall having a side wall projecting downward from the periphery of the top plate and having a recess opening downward.
The anti-vibration support structure for a work machine according to any one of claims 1 to 5, wherein the anti-vibration member is disposed in the recess of the subframe.   The anti-vibration support structure for a working machine according to any one of claims 1 to 6, wherein the stopper member is attached to all four corners of the subframe.   The anti-vibration support structure for a work machine according to any one of claims 1 to 6, wherein the stopper member is attached to two corners forming a diagonal of the subframe.   The anti-vibration support structure for a working machine according to any one of claims 1 to 6, wherein the stopper member is provided at two corners at both ends of one side of the subframe.

Images