JP2015160283A - Bracket for hydraulic breaker and hydraulic breaker including the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a bracket for a hydraulic breaker which enables easy attachment work of a breaker body to a bracket and fixes a back head with a simple structure, and to provide a hydraulic breaker including the bracket for the hydraulic breaker.SOLUTION: A bracket 10 includes: a bracket body 20 which covers a bottom surface 12 and side surfaces 13 of a breaker body 1 and an area of an upper surface 11 which ranges from the tip side to an intermediate portion; a divided bracket 30 which may be detachably attached to the bracket body 20 so as to connect the side surfaces with each other and is formed so as to cover an area ranging from the intermediate portion of the breaker body upper surface 11 to the rear end side; and pressing means which presses the rear end side upper surface 11 of the breaker body 1 toward the bottom surface 12 side of the bracket body 1 when the divided bracket 30 is attached to the bracket body 20.

Description

  The present invention relates to a hydraulic breaker used by being attached to a working machine such as a hydraulic excavator, and more particularly to a bracket for supporting a breaker body and a hydraulic breaker including the bracket.

  As shown in FIG. 5, this type of hydraulic breaker includes a breaker body 1 having a substantially rectangular cross section and a box-type bracket 100 that supports the breaker body 1. A base plate 102 is provided on the base end side of the bracket 100. A top bracket 101 is detachably mounted on the base plate 102, and a mounting portion 101s of the top bracket 101 is attached to an arm of a work vehicle.

As shown in FIG. 6, the breaker body 1 has a cylinder 2 at the center in the axial direction, and a back head 3 is connected to the rear end side of the cylinder 2. A piston (not shown) is slidably fitted in the cylinder 2, and a switching valve mechanism including a valve block 7 and an accumulator 6 are disposed on the upper surface of the cylinder 2. The breaker body 1 has a front head 4 connected to the tip end side of the cylinder 2, and a chisel 5 is inserted into the front head 4 so as to be able to move forward and backward in the axial direction. Then, by supplying pressure oil to the cylinder from the hydraulic supply source of the work vehicle via the switching valve mechanism, the piston is moved back and forth in the axial direction, and the rear end of the chisel 5 is hit by the piston. Is configured.
In this specification, based on the orientation of the breaker body, of the four substantially rectangular surfaces, the surface on which the valve block 7 is disposed is the “upper surface” and the opposite surface is “ The “bottom surface” and the other two surfaces are called “side surfaces”. Further, the facing direction of the “upper surface” and the “bottom surface” is referred to as the “height direction”, and the facing direction of the two “side surfaces” is referred to as the “width direction”.

When crushing is performed with this type of hydraulic breaker, the chisel is pressed against the object to be crushed, and the rear end of the chisel is hit with a piston built in the breaker body. As a result, the chisel generates a compressive stress wave that travels in the direction of the object to be crushed by striking the piston, and the chisel advances in the direction of the object to be crushed so that the object to be crushed can be crushed. .
Here, in this type of hydraulic breaker, conventionally, the top, bottom, both sides and end surfaces of the breaker body are box-shaped brackets in order to enhance the noise reduction effect during crushing work and to protect the breaker body from external impacts. (See, for example, FIG. 2 of Patent Document 1).

  In the conventional hydraulic breaker, as shown in FIG. 6 (a), the breaker body 1 is fixed between the left and right side plates 103 of the bracket as a structure for fixing the breaker body to the bracket. A spacer 105 and a buffer material 106 are mounted between the upper surface of the back head 3 and the back surface of the transfer plate 104, and a tightening bolt 106 is screwed from the upper surface side of the transfer plate 104. Back head fixing means for pressing and fixing the cushioning material 106 to the back head 3 via 105 has been proposed (see, for example, FIGS. 5 and 6 of Patent Document 2).

  In the hydraulic breaker described in Patent Document 2, in order to mount the breaker body on the bracket, as shown in FIG. 6 (b), the top bracket 101 is removed and the rear end portion (right side in the figure) of the bracket 100 is removed. The breaker body 1 is inserted into the bracket 100 from the chisel 5 side through the opening. At this time, the mounting position of the transfer plate 104 in the height direction is such that the accumulator 6 and the valve block 7 disposed on the upper surface of the breaker body 1 can pass with a minimum facing gap that does not interfere with the back surface of the transfer plate 104. Is set.

JP-A-10-29171 JP 2005-319559 A

  By the way, the work of attaching the breaker body to the bracket is to hold the heavy breaker body with a crane, etc., align the chisel axis and the bracket axis coaxially, and align the side surface of the breaker body and the inner wall surface of the bracket. The breaker body must be inserted into the bracket while aligning them so that they face each other. However, in the hydraulic breaker described in Patent Document 2, the accumulator, the valve block, and the like must be moved while being positioned so as not to interfere with the back surface of the transfer plate. Therefore, there exists a problem that workability | operativity of the operation | work which mounts a breaker main body to a bracket is not good.

  Further, in the hydraulic breaker described in Patent Document 2, in order to prevent interference between the switching valve mechanism and the transfer plate, the mounting position of the transfer plate in the height direction is set by the height of the switching valve mechanism. Must be high. Therefore, as for the dimensions of the spacer, the buffer material, and the tightening bolt of the back head fixing means, an extra space in the height direction in the bracket is required according to the mounting position of the transfer plate in the height direction. Therefore, there is a problem that the weight of the bracket increases accordingly. Furthermore, in the space inside the bracket with the breaker body mounted, equipment requiring maintenance from the outside of the bracket cannot be basically arranged except for the back head fixing means. There's a problem.

On the other hand, grease supply to the breaker body may be performed manually or manually. When using an automatic greasing device, the installation space and grease cartridge replacement work are related. Thus, the installation position of the automatic greasing device is on the upper surface side of the transfer plate of the bracket, and the entire automatic greasing device is exposed from the bracket.
However, when the automatic greasing device is exposed from the bracket, there is a problem that the automatic greasing device may be damaged by an external impact (scattering of shattered glass or erroneous operation). As countermeasures, in order to protect the automatic greasing device, measures such as extending the side plates on both side surfaces of the bracket higher than the automatic greasing device or additionally installing a protective bracket, etc. Such measures are not preferable because the design of the bracket shape is damaged, and the weight is further increased due to the additional parts.

  Further, in the bracket 100 illustrated in FIG. 6, in order to perform maintenance work of the accumulator 6 and the valve block 7, a top plate 107 as shown in FIG. 7 is provided detachably above the accumulator 6 and the valve block 7. There is something. For such a top plate 107, a thin resin plate is used in consideration of maintenance workability. However, since a thin plate made of resin is used for the top plate 107, the strength of the top plate 107 is lower than that of the other side plates constituting the bracket. It is preferable to make the area as small as possible.

  The present invention has been made paying attention to such problems, and it is easy to attach the breaker body to the bracket, and the bracket body (for example, the back head portion) can be fixed with a simple structure. It is an object of the present invention to provide a hydraulic breaker bracket and a hydraulic breaker including the bracket.

  In order to solve the above problems, a bracket for a hydraulic breaker according to an aspect of the present invention includes a cylinder in which a valve block of a switching valve mechanism is disposed on an upper surface, and a back head coupled to a rear end side of the cylinder. A bracket having a box structure that is used to support a breaker body having a front head coupled to a front end side of the cylinder and surrounds the periphery of the breaker body, and the entire bottom surface of the breaker body, A bracket main body that covers the entire surface of both sides, and from the front end side to the middle part of the upper surface, and a split bracket that is detachable from the bracket main body and covers an opening from the middle part of the upper surface of the breaker main body to the rear end side And mounting the split bracket to the bracket body to make the upper surface of the rear end side of the breaker body the bottom surface of the bracket body Characterized in that it comprises a pressing means for pressing the.

According to the bracket for a hydraulic breaker according to one aspect of the present invention, the bracket has a bracket body and a split bracket that can be attached to and detached from the bracket body. When the split bracket is mounted, the bracket is mounted so as to connect both side surfaces of the bracket body. When the split bracket is removed, the upper surface of the bracket body is opened so that the upper surface of the rear end side of the breaker body can be viewed from above.
Therefore, in the state where the split bracket is mounted, the split bracket is mounted so as to connect both side surfaces of the bracket body, so that a sealed structure is formed.
Further, when the split bracket is removed, the connecting plate for connecting both side surfaces of the bracket in the hydraulic breaker described in Patent Document 2 is not necessary, and the upper surface of the bracket body is opened so that the rear end side of the breaker body can be seen from above. Therefore, by removing the divided bracket, the upper surface of the bracket body is opened so that the rear end of the breaker body is visible from the upper surface side, and the work of inserting the hydraulic breaker into the bracket body is easy.
And, since the split bracket can be attached so that both sides of the bracket body are connected after the breaker body is inserted into the bracket body, the design freedom of the bracket shape is improved, especially the above-mentioned transfer plate is unnecessary Therefore, it is possible to reduce the height of the bracket and to make it compact.

  Furthermore, since the pressing means presses the rear end side upper surface of the breaker body toward the bottom surface side of the bracket body by mounting the divided bracket on the bracket body, the pressing means itself can be compactly gathered. Therefore, it is possible to prevent an extra space from being generated in the closed space of the bracket. If the distance between the breaker body and the dividing bracket is set optimally, the breaker body can be easily pressed and fixed simply by attaching the dividing bracket. Therefore, the breaker body (for example, the back head portion) can be fixed with a simple structure.

  Here, in the bracket for a hydraulic breaker according to an aspect of the present invention, the pressing means includes a buffer member interposed between a back surface of the split bracket and a rear end side upper surface of the breaker body, the split bracket, If it is comprised by the fastening part of the said bracket main body mutually, and it presses the said buffer member by fastening the said division bracket to the said bracket main body by the said fastening part, it is suitable on simplifying the structure of a press means. It is.

  Moreover, in the bracket for a hydraulic breaker according to an aspect of the present invention, the divided bracket has a recess surrounded by left and right side walls on its upper surface, and an automatic greasing device is installed in the recess. If it is, it is suitable when protecting an automatic greasing apparatus from an external impact, making it possible to accommodate an automatic greasing apparatus, without enlarging a bracket.

  Further, in the bracket for a hydraulic breaker according to an aspect of the present invention, the divided bracket is a front portion of the bracket, and a place facing the accumulator or the valve block provided in the breaker body is manually applied by an operator. If it is formed of a resin top plate that can be attached and detached by elastic deformation, and the parts other than the top plate are made of steel, the required strength is maintained while ensuring the maintainability of the accumulator or valve block. In addition, it is suitable for minimizing the decrease in sound insulation.

In order to solve the above-described problem, a hydraulic breaker according to an aspect of the present invention is a hydraulic breaker including a breaker body and a bracket that supports the breaker body, and the bracket is an aspect of the present invention. The hydraulic breaker bracket according to the present invention is provided.
According to the hydraulic breaker according to one aspect of the present invention, since the bracket for a hydraulic breaker according to one aspect of the present invention is provided, it is easy to mount the breaker body on the bracket, and the breaker body is fixed with a simple structure. Is possible.

  As described above, according to the present invention, the breaker body can be easily attached to the bracket, and the breaker body can be fixed with a simple structure.

It is a figure explaining one Embodiment of the hydraulic breaker which concerns on this invention, The figure (a) is the top view, (b) is a front view. BRIEF DESCRIPTION OF THE DRAWINGS It is a figure explaining one Embodiment of the bracket for hydraulic breakers based on this invention, The figure (a) is a longitudinal cross-sectional view along an axis line, (b) is a breaker main body in the bracket of the state which removed the top bracket. It is the longitudinal cross-sectional view which showed the state mounted | worn. It is a figure explaining the bracket main body which comprises a bracket, The figure (a) is the top view, (b) is a front view. It is a figure explaining the division | segmentation bracket which comprises a bracket, The figure (a) is the top view, (b) is a front view, (c) is the right view of the figure (b), (d) is the figure (A) AA sectional drawing, (e) is BB sectional drawing of the figure (b). It is a figure explaining an example of the conventional hydraulic breaker, The figure (a) is the top view, (b) is a front view. It is a figure explaining an example of the bracket for the conventional hydraulic breaker, The figure (a) is a longitudinal cross-sectional view along an axis, (b) is a longitudinal cross-sectional view which showed the state by which the breaker main body was mounted in the bracket. is there. It is explanatory drawing of the cover member which comprises the bracket for conventional hydraulic breakers, The figure (a) is the top view, (b) is a front view.

Hereinafter, an embodiment of the present invention will be described with reference to the drawings as appropriate. Since the breaker body itself has the same configuration as the breaker body of the above-described conventional hydraulic breaker, the corresponding components will be described with the same reference numerals.
As shown in FIG. 1, the hydraulic breaker of the present embodiment includes a breaker body 1 having a substantially rectangular cross section and a bracket 10 that supports the breaker body 1. The breaker body 1 having a substantially rectangular cross section has four outer surfaces along the axial direction, that is, an upper surface 11, a bottom surface 12, and left and right side surfaces 13 and 13.

  Specifically, as shown in FIG. 2, the breaker body 1 has a cylinder 2 at the center in the axial direction of the breaker body 1, and a back head 3 is connected to the rear end side (right side of the figure) of the cylinder 2. A piston (not shown) is slidably fitted in the cylinder 2, and a switching valve mechanism including a valve block 7 and an accumulator 6 are disposed on the upper surface 11 of the cylinder 2. The breaker body 1 has a front head 4 on the tip side (left side in the figure), and a chisel 5 is inserted into the front head 4 so as to be able to move forward and backward in the axial direction. Then, by supplying pressure oil to the cylinder 2 from the hydraulic supply source of the work vehicle via the switching valve mechanism, the piston is moved back and forth in the axial direction, and the rear end of the chisel 5 is hit by the piston. The mechanism is configured.

The bracket 10 has a box-type structure that surrounds the breaker body 1 so as to be sealed, and includes a bracket body 20, a divided bracket 30, and a top bracket 26 as shown in FIGS. . Base plates 24 and 25 are provided as attachment surfaces of the top bracket 26 on the rear end sides of the bracket body 20 and the divided bracket 30, and the top bracket 26 is fastened to the base plates 24 and 25 by a plurality of bolts 40. It is detachably attached.
When the top bracket 26 and the split bracket 30 are removed from the bracket body 20 (see FIG. 2B), an opening through which the breaker body 1 can be inserted and removed is exposed on the rear end surface of the bracket body 20. It has become so. The top bracket 26 is provided with two pin holes 26 s spaced vertically along the width direction as arm mounting portions of the work vehicle, and the work vehicle arm pins are inserted into the pin holes 26 s to perform work. It can be mounted on the arm of the vehicle.

As shown in FIGS. 1 to 3, the bracket body 20 includes four top plates 21, bottom plates 22, and side plates 23 and 23 that are long rectangular plate members. The top plate 21, the bottom plate 22, and the side plates 23 and 23 are opposed to the four outer surfaces 11, 12, 13, and 13 from the front head 4 to the back head 3 of the breaker body 1 with a predetermined gap therebetween. The upper surface plate 21, the bottom surface plate 22, and the side surface plates 23, 23 surround the breaker body 1 so as to be sealed. A buffer member 28 is mounted in advance at a predetermined location on the inner wall surface of the bracket body 20.
A front plate 27, which is a plate member having a substantially square shape in plan view, is mounted on the front end surface of the bracket body 20 so as to face the front end surface of the front head 4 of the breaker body 1. An insertion hole 27d of the chisel 5 is formed through the center of the front plate 27 along the axial direction. The inner diameter dimension of the insertion hole 27d should not interfere with the chisel 5 while taking into account the so-called dynamic “pick” movement of the chisel 5 during crushing operations and the clearance between the front head 4 and the chisel 5 attached. The dimension of the front end face in the axial direction of the breaker body 1 is set to be able to be sealed as much as possible.

Here, the bracket body 20 has a bottom plate 22 and side plates 23, 23 with respect to the bottom surface 12 and both side surfaces 13, 13 of the breaker body 1, and the entire bottom surface 12 and both side surfaces 13, 23 of the breaker body 1. 13 are arranged opposite to each other over the entire surface. On the other hand, the upper surface plate 21 covers the upper surface 11 of the breaker body 1 only from the front end side to the middle part of the upper surface 11, and the rear end side of the middle part is an opening 21 k.
In the present embodiment, the upper surface plate 21 includes a front plate portion 21a and a rear plate portion 21b. The front side plate portion 21 a is provided as a surface substantially parallel to the upper surface 11 in a range substantially facing the extending range of the front head 4 in the axial direction on the upper surface 11. The rear side plate portion 21b is formed by an inclined surface that is inclined upward from the front side toward the rear side so as not to interfere with the accumulator 6 and the valve block 7 provided on the upper surface of the cylinder 2 in the upper surface 11. (See FIG. 2 (a)). Thereby, the upper surface plate 21 of the bracket body 20 covers the upper surface 11 of the breaker body 1 from the front head 4 to a position facing the accumulator 6 and valve block 7 mounting portions on the cylinder 2.

  The upper surface plate 21 is formed in a concave arcuate shape so that the front end edge of the opening 21k on the rear end side with respect to the middle portion is exposed to the accumulator 6 and the valve box 7 (see FIG. 3 (a)). That is, when the breaker body 1 is assembled at a predetermined position of the bracket body 20 and the split bracket 30 is not mounted, the space above the accumulator 6 and the valve box 7 and the rear from the valve box 7 are The upper surface of the head 3 is opened so as to be substantially exposed.

  Further, in the present embodiment, as shown in FIG. 3, each side plate 23, 23 of the bracket body 20 has a notch portion 23 k formed by notching the upper part on the rear end side in a substantially L-shaped edge shape. The front end position of the substantially L-shaped edge of the notch 23k is substantially the same as the rear end position of the valve box 7 in the axial direction. Further, the edge portion of the cutout portion 23k along the axial direction of the substantially L-shaped edge is extended in a range substantially opposite to the range in which the upper surface 11 of the back head 3 extends in the axial direction. The front end corner of the notch 23k has a concave R shape.

  Further, as shown in the figure, on the rear end side of each side plate 23, 23 of the bracket body 20, a mounting flange 23f extending horizontally in the width direction extends in the width direction of the notch 23k. Each is provided according to the range. The upper surface of the attachment flange 23f is a horizontal plane along the axis of the breaker body 1 and serves as a mounting surface for the split bracket 30. On the rear surface side of the mounting flange 23f, rib structures 23r for reinforcing the strength of the mounting flange 23f are provided at two locations separated in the axial direction.

On the other hand, as shown in FIG. 4, the divided bracket 30 is formed so as to cover the opening 21 k of the upper surface plate 21 in a plan view, and is disposed opposite to the position of the front edge of the opening 21 k. A top plate 50 and a face plate 34 arranged in parallel to face the upper surface 11 of the back head 3 are provided.
At the rear end of the face plate 34, a base plate 25, which is an attachment member that comes into contact with the top bracket 26, is provided along a direction orthogonal to the axis. A plurality of mounting holes 25r for mounting mounting bolts are formed in the base plate 25 at appropriate positions along the axial direction. Both end portions in the width direction of the face plate 34 project as horizontal planes along the axis of the breaker body 1 in the width direction from both side surface plates 23, 23 of the bracket body 20. A pair of mounting flanges 34f, 34f that respectively contact the left and right mounting flanges 23f.

  In addition, a pair of side walls 32, 32 are erected on the upper surface of the face plate 34 along the axial direction so as to be separated in the width direction. The pair of side walls 32, 32 are reinforced by the reinforcing ribs 34r on the side of the pair of attachment flanges 34f, 34f, and are reinforced by the reinforcing ribs 32r on the side of the base plate 25. The pair of side walls 32, 32 has a shape corresponding to the notch 23k formed in each side plate 23, 23 of the bracket body 20, and when the divided bracket 30 is assembled to the bracket body 20, the notch 23k is formed. The both sides of the bracket 10 are configured to be flush with each other by being fitted into the edge.

  Further, a mounting seat 31 for mounting the automatic greasing device 60 is provided on the upper surface of the face plate 34 between the left and right side walls 32 and 32 and slightly above the upper surface of the face plate 34. The mounting seat plate 31 includes a horizontal portion 31 a that faces the upper surface of the back head 3, and an L-shaped bowl portion 31 b that covers the rear end and the upper surface of the valve box 7. On the lower surface of the horizontal portion 31a, a pair of holding portions 36 for holding the buffer member 42 from the front and rear in the axial direction are provided along the width direction and spaced apart in the axial direction.

The mounting seat plate 31, the left and right side walls 32, 32, and the base plate 25 define a recess 33 in the upper part of the divided bracket 30 that can accommodate the automatic greasing device 60. A rectangular opening 31h is formed as a mounting seat 37 of the automatic greasing device 60 at the center position on the front side of the upper surface of the horizontal portion 31a of the mounting seat 31. As shown in FIG. The automatic greasing device 60 can be mounted while being positioned at a predetermined position.
As shown in FIG. 4, two reinforcing walls 35, 35 are provided so as to connect the front surface of the base plate 25 and the upper surface of the mounting seat plate 31 along both sides of the rectangular opening 31 h. ing. The two reinforcing walls 35, 35 are formed in a substantially triangular shape as shown in FIG. 4D, and notches 35 n are provided at the corners of the base plate 25 and the mounting seat plate 31. Yes.

The top plate 50 is detachably provided on the distal end side of the saddle portion 31b of the mounting seat plate 31. The top plate 50 has a convex arch shape corresponding to the concave arch shape of the opening 21k of the upper surface plate 21 constituting the bracket body 20.
Each component of the split bracket 30 is integrated by welding with a steel material having the same strength as each component of the bracket body 20 in order to cope with vibration and noise suppression of the hydraulic breaker except for the top plate 50. Yes.

On the other hand, the top plate 50 is made of a resin thin plate in consideration of workability of attachment / detachment work, and can be elastically deformed by an operator by applying force by hand, and a special tool or the like is used. It can be easily attached and detached without any change (see FIGS. 4B and 4D). In the present embodiment, the outer peripheral edge of the top plate 50 is formed with a concave groove 50m on the entire periphery, and the engagement portion between the top plate 50 and the divided bracket 30 and the engagement between the top plate 50 and the bracket body 20. The part can be attached and detached by fitting a concave groove 50m around the top plate 50 to the edge 31e of the plate constituting the divided bracket 30 and the plate edge 21k constituting the bracket main body 20.
The size of the top plate 50 in plan view is set to be as small as possible in the range necessary for maintenance of the accumulator 6 and the valve block 7 when the top plate 50 is removed. The top plate 50 is formed with two insertion holes 50h through which pipes for supplying and discharging pressure oil to and from the breaker body 1 are inserted.

Next, a procedure for mounting the breaker main body 1 on the hydraulic breaker bracket 10 will be described.
When mounting the breaker body 1 on the bracket 10, first, the top bracket 26 and the divided bracket 30 are removed from the bracket body 20 as shown in FIG. Thereby, the opening part which can insert the breaker main body 1 is exposed to the rear end surface of the bracket main body 20.

Next, the breaker body 1 is held by a crane or the like, the rod axis of the chisel 5 and the bracket axis are aligned coaxially, and the four surfaces (left and right side surfaces 13, 13, bottom surface 12, top surface 11) of the breaker body 1 and the bracket From the chisel 5 side to the opening on the rear end surface of the bracket body 20 while matching the positions facing the four inner wall surfaces of the body 20 (the inner wall surfaces of the left and right side plates 23, 23, the bottom plate 22, and the top plate 21). The breaker body 1 is inserted into the bracket body 20.
At this time, when the split bracket 30 is removed, the upper surface 11 on the rear end side of the bracket body 20 is opened so that the upper surface on the rear end side of the breaker body 1 can be seen from above, so that the accumulator 6 and the valve box There is no possibility of interference between the bracket body 20 and the bracket 7. Therefore, for example, compared to the conventional bracket structure in which an interfering object such as a transfer plate described in Patent Document 2 is present, the work of mounting the breaker body 1 to the bracket 10 of the present embodiment is very easy. ing.

  After the breaker body 1 is inserted to a predetermined position of the bracket body 20, the divided bracket 30 is then assembled. At this time, the buffer member 42 is mounted in advance on the back surface (lower surface) of the divided bracket 30 by holding the buffer member 42 with the pair of holding portions 36 from the front and rear in the axial direction (see FIG. 2A). Then, as shown in FIG. 1, the mounting flanges 23 f and 23 f of the bracket body 20 and the mounting flanges 34 f and 34 f of the divided bracket 30 are brought into contact with each other and fastened to each other by bolts 44. Thereby, the buffer member 42 is inserted between the back surface of the split bracket 30 and the rear-end-side upper surface 11 of the breaker body 1, and is pressed in the opposing direction of the breaker body 20 and the split bracket 30. At this time, the distance between the breaker body 20 and the divided bracket 30 in the facing direction is set optimally, and the breaker body 20 is pressed and fixed with the desired pressing force simply by mounting the divided bracket 30.

  When the divided bracket 30 is assembled to the bracket body 20, the rear end surfaces of the base plates 24 and 25, that is, the mounting surface of the top bracket 26 becomes a continuous and flush surface. Next, as shown in FIG. 2A, the shock absorber 29 (for example, disclosed in JP-A-10-29171) is used at the rear end of the back head 3 from the opening on the rear end surface of the bracket body 20. A breaker work can be performed by attaching the top bracket 26 to the rear end faces of the base plates 24 and 25 with bolts 40 and finally attaching the top bracket 26 to the arm of the work vehicle.

Here, according to the hydraulic breaker of the present embodiment, the split bracket 30 is attached so as to connect the both side surfaces 23 and 23 of the bracket body 20 after the breaker body 1 is inserted into the bracket body 20, so that the above-mentioned patent document 2 is not necessary. Therefore, the degree of freedom in designing the bracket shape is improved, and the height of the bracket can be reduced and a compact configuration can be achieved. In other words, since a useless wide space for assembling the breaker is not required between the divided bracket 30 and the back head 3 as in the prior art, the space efficiency is good.
Moreover, since this division bracket 30 has the recessed part 33 enclosed by the left and right side walls 32 and 32 in the upper surface of itself, and the automatic greasing apparatus 60 can be installed in this recessed part 33, lengthening a bracket Without being able to accommodate the automatic greasing device 60, the automatic greasing device 60 can be protected from external impact.

Further, the buffer member 42 is mounted in advance on the lower surface of the divided bracket 30 and the divided bracket 30 is fastened to the bracket main body 20 with the bolts 44 so that the upper surface of the back head 3 on the rear end side of the breaker main body 1 can be Therefore, the pressing means itself can be compactly gathered. Therefore, it is possible to prevent an extra space from being generated in the closed space of the bracket 10.
In addition, the distance between the breaker body 20 and the divided bracket 30 in the opposing direction is optimally set, and the breaker body can be pressed and fixed with the desired pressing force simply by mounting the divided bracket 30. Therefore, the breaker body 1 (in this example, the portion of the back head 3) can be easily fixed with a simple structure. Further, it is not necessary to use an unnecessarily large buffer member 42, and the adjustment of the strength of the pressing force can be easily adjusted by inserting a shim or the like between the buffer member 42 and the divided bracket 30. .

Here, the hydraulic breaker needs periodic maintenance and adjustment, and during the maintenance and adjustment, the accumulator 6 and the valve box 7 may be exposed. According to the hydraulic breaker of this embodiment, A portion of the front portion of the split bracket 30 that faces the accumulator 6 and the valve block 7 provided in the breaker body 1 is formed by a detachable top plate 50. Therefore, a maintenance space for the accumulator 6, the valve box 7, etc. Can be easily secured.
In particular, the top plate 50 is a thin plate made of resin, and can be easily removed by an operator by applying force and elastically deforming it without using a special tool or the like, so that the accumulator 6, the valve box 7, etc. This is suitable for easily securing a maintenance space. In addition, since the size of the top 50 in plan view is set as small as possible within a range necessary for maintenance, it is possible to minimize a decrease in sound insulation performance.

The bracket for a hydraulic breaker according to the present invention and the hydraulic breaker provided with the same are not limited to the above-described embodiments, and various modifications can be made without departing from the spirit of the present invention. .
For example, in the above embodiment, the split bracket 30 has been described as an example having the detachable top plate 50. However, the present invention is not limited to this, and the split bracket 30 does not have a detachable top plate. Alternatively, an integrated structure may be used. However, when the maintenance space of the switching valve mechanism can be easily secured, it is preferable that the divided bracket is configured to have a detachable top plate as in the above embodiment.

For example, in the above-described embodiment, the concave portion in which the automatic greasing device 60 can be installed on the upper surface of the divided bracket 30 has been described by the left and right side walls 32, 32, and the like. It is good also as a structure which does not have a left-right side wall or the recessed part defined by this. However, in order to protect the automatic greasing device from external impacts while allowing the automatic greasing device to be accommodated without increasing the length of the bracket, a recess capable of installing the automatic greasing device on the upper surface of the divided bracket. Is preferably defined by left and right side walls.
Further, for example, in the above-described embodiment, as the pressing means for fixing the breaker body 1, the buffer member 42 inserted between the back surface of the divided bracket 30 and the upper surface of the rear end side of the breaker body 1, the divided bracket 30 and the bracket body. Although the example which presses the buffer member 42 by having comprised the fastening part of 20 mutual and fastening the division | segmentation bracket 30 to the bracket main body 20 by a fastening part was shown, it does not restrict to this but attaches | subjects a division | segmentation bracket to a bracket main body. Thus, various forms can be adopted as the pressing means as long as the upper surface of the rear end side of the breaker body can be pressed toward the bottom surface of the bracket body.

1 Breaker body 2 Cylinder 3 Back head 4 Front head 5 Chisel 6 Accumulator (switching valve mechanism)
7 Valve block (switching valve mechanism)
10 Bracket 11 Top surface of breaker body 12 Bottom surface of breaker body 13 Side surface of breaker body 14 Front end surface of breaker body 15 Rear end surface of breaker body 20 Bracket body 21 Top plate 22 Bottom plate 23 side Face plate 24 Base plate 25 Base plate 26 Top bracket 27 Front plate 30 Dividing bracket 31 Mounting seat plate 32 Side wall 33 Recess 34 Face plate 35 Reinforcing wall 36 Holding portion 37 Mounting seat portion 40 Bolt 42 Buffer member 50 Top plate 60 Automatic greasing device

Claims (5)

To support a breaker body having a cylinder having a valve block of a switching valve mechanism on the upper surface, a back head connected to the rear end side of the cylinder, and a front head connected to the front end side of the cylinder. Is a box-type bracket that surrounds the periphery of the breaker body,
A bracket body that covers the entire bottom surface of the breaker body, both side surfaces, and the top surface to the middle part of the top surface, and is attachable to and detachable from the bracket body and from the middle part of the top surface of the breaker body to the rear end side And a pressing means for pressing the upper surface of the rear end side of the breaker body toward the bottom surface side of the bracket body by attaching the divided bracket to the bracket body. Bracket for hydraulic breaker.   The pressing means includes a buffer member interposed between a back surface of the split bracket and a rear-end-side upper surface of the breaker body, and a fastening portion between the split bracket and the bracket body. The bracket for a hydraulic breaker according to claim 1, wherein the buffer member is pressed by being fastened to the bracket body by the fastening portion.   The split bracket has a concave portion surrounded by left and right side walls on its upper surface, and an automatic greasing device is installed in the concave portion. Bracket for hydraulic breaker as described.   The division bracket is formed by a resin top plate that is detachable by an operator manually applying force and deforming the front portion of the divided bracket facing the accumulator or valve block provided in the breaker body. The bracket for a hydraulic breaker according to any one of claims 1 to 3, wherein a portion other than the top plate is formed of a steel material. A hydraulic breaker comprising a breaker body and a bracket for supporting the breaker body,
A hydraulic breaker comprising the bracket for a hydraulic breaker according to any one of claims 1 to 4 as the bracket.

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