JP6234330B2 - Working machine - Google Patents

Description

  The present invention relates to a work machine such as a backhoe (construction machine).

Conventionally, as a working machine, there is one disclosed in Patent Document 1, for example.
This working machine has a machine body that is mounted on a traveling device so as to be rotatable around a vertical turning axis. This machine body has a machine body in which a reinforcing member, a device mounting member, and the like are fixed on a frame substrate constituting a bottom portion by welding or the like.
The engine is installed horizontally in the left and right direction at the rear of the aircraft. Anti-vibration mounts are provided in front of and behind the engine, and the anti-vibration mounts are attached to an engine support stand that is erected and fixed on a frame substrate.

A control valve for controlling various hydraulic devices installed in the work machine is disposed on the right side of the machine body, and a hydraulic pump that supplies hydraulic oil to the hydraulic device is disposed on the left side of the machine body. The control valve is located on the front side on the right side of the engine, and the hydraulic pump is provided on the left side of the engine.
The hydraulic hose for hydraulic oil delivery from the hydraulic pump to the control valve is bent in a curved shape from the left side to the right side on the front side of the hydraulic pump, and is disposed to the right through the front side of the engine. It is bent in the shape of a curve on the right side of the engine and arranged in the control valve.

JP 2002-155542 A

In the conventional working machine, the hydraulic hose from the hydraulic pump to the control valve is bent in a curved shape on both the left and right sides of the engine and is disposed through the front side of the engine. In some cases, the minimum bending radius of the hydraulic hose cannot be sufficiently secured.
In such a case, the minimum bending radius of the hydraulic hose can be increased by arranging the hydraulic hose through the rear side of the engine. However, when the hydraulic hose is arranged through the rear side of the engine, the hydraulic pressure hose can be increased. The hose is disposed in front of a rear engine support for attaching a vibration isolation mount on the rear side of the engine.

In the case where the hydraulic hose is arranged on the rear side of the engine in this way, since the hydraulic hose is arranged in front of the rear engine support base, in order to avoid interference with the hydraulic hose, The engine must be moved up or forward. Moving the engine up or down will cause the weight balance to deteriorate.
Then, this invention makes it a subject to provide the working machine which can arrange | position a hydraulic hose on the rear side of an engine, keeping a weight balance favorable in view of the said problem.

The technical means taken by the present invention to solve the technical problems are characterized by the following points.
The working machine has a machine body of the engine to the rear is mounted, on the airframe, the engine support stand for mounting support the vibration damping mount which is provided before and after the engine is provided, the oil pressure devices on one of left and right sides of the machine body A work machine in which a control valve to be controlled is disposed, a hydraulic pump is provided on the left and right side of the engine, and a hydraulic hose is disposed from the hydraulic pump to the control valve.
A passage forming a hose disposition passage for disposing the hydraulic hose between a rear engine support base for mounting a vibration isolation mount on the rear side of the engine and a frame substrate constituting the bottom of the fuselage Providing a forming member ,
The passage forming member is fixed to the frame substrate by extending downward from at least one end side in front and rear of the upper wall portion that is disposed along the left-right direction with a space above the frame substrate. A vertical wall portion, and the lower portion of the upper wall portion is the hose arrangement passage, and the rear engine support base is fixed on the upper wall portion,
A clamp bracket to which a hose clamp for holding the hydraulic hose is fixed is fixed to the vertical wall portion of the passage forming member, and an opening for assembling the hose clamp to the clamp bracket from above on the upper wall portion of the passage forming member A part is formed .

In addition, the work machine has a machine body with an engine mounted on the rear, an engine support base for attaching and supporting vibration-proof mounts provided on the front and rear of the engine is provided on the machine body, and various hydraulic pressures are provided on the left and right sides of the machine body. A work machine in which a control valve for controlling equipment is arranged, a hydraulic pump is provided on the engine side on the left and right sides of the machine body, and a hydraulic hose is provided from the hydraulic pump to the control valve,
A passage forming a hose disposition passage for disposing the hydraulic hose between a rear engine support base for mounting a vibration isolation mount on the rear side of the engine and a frame substrate constituting the bottom of the fuselage Providing a forming member,
Said passage member, said has a upper wall portion above the frame substrate at intervals are arranged and along the horizontal direction, and a vertical wall portion fixed to the frame substrate, the upper wall The lower part is the hose arrangement passage ,
The passage forming member is configured such that the vertical wall portion extends downward from the rear end of the upper wall portion, and the hose arrangement passage is open frontward .

Further, the rear engine support base is fixed on the upper wall portion .

Further, the frame board has a pair of left and right vertical ribs arranged from the front part to the rear part and fixed on the frame board, and the passage forming member is arranged between the rear parts of the left and right vertical ribs. The left end portion side of the forming member is fixed to the rear portion of the vertical rib located on the left side, and the right end portion side of the passage forming member is fixed to the rear portion of the vertical rib located on the right side .

The present invention has the following effects.
An engine support base on the rear side for mounting the vibration damping mount of the rear side of the engine, between the frame board which constitutes the bottom of the fuselage, the passage forming the hose placement channel for disposing the hydraulic hose By providing the forming member, it is possible to dispose the hydraulic hose on the rear side of the engine while disposing the engine at an appropriate position and maintaining a good weight balance.

In addition, the rear engine support base can be fixed on the upper wall portion of the passage forming member, and the passage formation member and the engine support base can be sub-assembled, facilitating the manufacture of the fuselage. .
Also, in addition to the rear engine support base, the clamp bracket can be fixed to the passage forming member, and these passage formation member, engine support base and clamp bracket can be sub-assembled, facilitating the manufacture of the fuselage. Can be planned. In addition, the hose clamp can be assembled to the clamp bracket from the upper side through the opening formed in the upper wall portion of the passage forming member, and the ease of assembly can be facilitated.

In addition, by forming the passage forming member so that the hose arrangement passage is open forward,
The hydraulic hose can be easily disposed from the front side of the passage forming member.
Further , a passage forming member is disposed between the rear portions of the left and right vertical ribs fixed on the frame substrate, and the left end portion side of the passage forming member is fixed to the rear portion of the vertical rib located on the left side . By fixing the right end portion to the rear portion of the vertical rib located on the right side , the strength of the airframe can be increased.

It is a side view of a backhoe. It is a top view of a turntable. It is a top view of a body frame. It is a rear view of a body frame. It is the perspective view which looked at the body frame from the back. It is an AA arrow directional view of FIG. It is the perspective view which looked at the rear end side of the body frame from diagonally left front. It is a top view of the rear end side of a body frame. It is a BB line arrow line view of FIG. (A), (b) is side surface sectional drawing which shows a modification.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
FIG. 1 shows a backhoe 1 exemplified as a work machine.
The backhoe 1 includes a lower traveling device 2 and an upper rotating body 3.
The traveling device 2 has a pair of left and right crawler-type traveling devices 20 that travels in an endless belt-shaped rubber crawler 15 that circulates in a circumferential direction with drive wheels 40 driven by a hydraulic motor. A front end of the traveling device 2 is equipped with a dozer device 23 driven by a hydraulic cylinder.

The swivel body 3 includes a swivel base 4 (machine body) mounted on the traveling device 2 so as to be pivotable about a swivel axis in the vertical direction, and a work device 5 (excavation work device) provided at a front portion of the swivel base 4. ). The swivel base 4 is swiveled around a swivel axis by a hydraulic motor.
As shown in FIG. 2, the swivel 4 includes a driver's seat D, an engine E, first and second hydraulic pumps P1 and P2, a radiator R, an oil cooler O, a hydraulic oil tank T, a battery B, a control valve V1, An operation pattern switching valve V2 and the like are provided.

The driver's seat D is disposed at the rear of the swivel 4 and to the left from the center in the left-right direction. Control tables 12L and 12R are provided on the left and right sides of the driver's seat D, and control devices 14L and 14R having control levers 13L and 13R are provided on the control tables 12L and 12R, respectively.
The engine E is horizontally disposed in the left-right direction and mounted on the rear part of the swivel base 4.

The first hydraulic pump P1 and the second hydraulic pump P2 are attached to the left side of the engine E and are driven by the engine E.
The first hydraulic pump P1 is a split flow type hydraulic pump having a function of a constant flow double pump that discharges an equal amount of hydraulic fluid from two independent discharge ports. The first hydraulic pump P1 is used for supplying hydraulic oil that operates various hydraulic actuators installed in the backhoe 1.

The second hydraulic pump P2 is a constant displacement gear pump, and is used for supplying a signal pressure such as a pilot pressure or a detection signal.
The radiator R is disposed on the right side of the engine E, and the oil cooler O is disposed on the right side of the radiator R.
The hydraulic oil tank T and the battery B are disposed in front of the radiator R and the oil cooler O, and the control valve V1 and the operation pattern switching valve V2 are disposed in front of the hydraulic oil tank T and the battery B.

The control valve V1 is formed by sequentially arranging control valves for controlling the hydraulic actuators mounted on the backhoe 1 in the vertical direction and interconnecting them.
As shown in FIG. 3, three hydraulic hoses H1, H2, and H3 for delivering hydraulic oil are disposed from the first hydraulic pump P1 and the second hydraulic pump P2 to the control valve V1.

  One end side of the first hydraulic hose H1 is connected to one discharge port of the first hydraulic pump P1, and one end side of the second hydraulic hose H2 is connected to the other discharge port of the first hydraulic pump P1, One end of the hydraulic hose H3 is connected to the discharge port of the second hydraulic pump P2. The other ends of the first to third hydraulic hoses H1, H2, and H3 are connected to the input port of the control valve V1.

  The first to third hydraulic hoses H1, H2, and H3 are arranged from the front side of the first and second hydraulic pumps P1 and P2 to the rear side through the lower side of the first and second hydraulic pumps P1 and P2. And bent in a curved shape toward the right side, and arranged in a straight line with the lower rear side of the engine E (the rear side of the oil pan) directed to the right, and then diagonally right on the right side of the engine E It is disposed in the front and is bent in a curved shape toward the front, and is disposed to the front side of the control valve V1 through the outer side in the left-right direction of the tank support 16 that supports the hydraulic oil tank T.

As shown in FIG. 2, the engine E, the first and second hydraulic pumps P1 and P2, the radiator R, the oil cooler O, the hydraulic oil tank T, the battery B, the control valve V1, and the operation pattern switching valve V2 are the cover device 17. Covered by.
The cover device 17 is roughly divided into an engine cover body 18 that covers the engine E and the first and second hydraulic pumps P1 and P2, a radiator R, an oil cooler O, a hydraulic oil tank T, a battery B, a control valve V1, and the like. Side cover body 1 covering the operation pattern switching valve V2
9.

  As shown in FIG. 1, the working device 5 includes a swing bracket 7 supported on a support bracket 6 provided at the front portion of the swivel 4 so as to be swingable left and right around a vertical axis, and the swing bracket. The boom 8 is connected to the upper part of the boom 7 so as to be swingable up and down, the arm 9 is connected to the tip side of the boom 8 so as to swing back and forth, and is connected to the tip side of the arm 9 so as to swing back and forth. Bucket 10. These swing bracket 7, boom 8, arm 9, and bucket 10 are driven by a hydraulic cylinder. The bucket 10 is provided with a hanging metal fitting 11 so that crane work is possible.

As shown in FIGS. 3 to 5, the swivel base 4 includes a body frame 21 serving as a skeleton formed by combining plate materials and the like. As shown in FIG. 1, weights 22 constituting the rear part of the swivel base 4 are attached to the rear part of the airframe frame 21. A revolving cover is attached.
As shown in FIGS. 3 to 5, the fuselage frame 21 includes a frame substrate 24 made of a thick plate material that forms the bottom of the swivel base 4, and a pair of left and right reinforcing vertical members welded and fixed on the frame substrate 24. Ribs 25L and 25R are provided.

The left and right vertical ribs 25 </ b> L and 25 </ b> R are made of a plate material, are arranged vertically so as to face each other in the left-right direction, and are provided from the front part to the rear part of the frame substrate 24. A pair of upper and lower support brackets 6 are fixed to the front portions of the left and right vertical ribs 25L and 25R by welding.
As shown in FIG. 7, insertion portions 27L and 27R through which the first to third hydraulic hoses H1, H2, and H3 pass are formed at the rear portions of the left and right vertical ribs 25L and 25R, respectively. The insertion portion 27L of the left vertical rib 25L is formed by an open notch downward and rearward. The insertion portion 27R of the right vertical rib 25R is formed in a long hole shape that is long in the front-rear direction.

As shown in FIGS. 6 to 9, a passage forming member 29 is provided between the rear end sides of the left and right vertical ribs 25L and 25R. The passage forming member 29 is for forming a hose disposing passage 28 in which a hydraulic hose is disposed.
As shown in FIG. 8, the passage forming member 29 is formed in the left-right direction from one vertical rib 25L, 25R to the other vertical rib 25L, 25R, and as shown in FIG. 30) It is arranged on the rear side.

  As shown in FIG. 9, the passage forming member 29 is formed by bending a plate material, and an upper wall portion 29a disposed above the frame substrate 24 with a space therebetween, and a rear wall of the upper wall portion 29a. An L-shaped cross section is formed from the vertical wall portion 29b extending downward from the end portion. The lower end of the vertical wall portion 29b of the passage forming member 29 is fixed to the frame substrate 24 by welding or the like. A lower portion of the upper wall portion 29a is a hose arrangement passage 28. In the present embodiment, second and third hydraulic hoses H2 and H3 are arranged in the hose arrangement passage 28. Further, the hose arrangement passage 28 is open forward, and the second and third hydraulic hoses H2 and H3 can be arranged in the hose arrangement passage 28 from the front side. .

  A clamp bracket 31 is fixed to the left side and the right side of the vertical wall portion 29 b of the passage forming member 29. As shown in FIG. 9, the clamp bracket 31 includes a mounting wall 31a fixed to the front surface of the vertical wall portion 29b of the passage forming member 29 and a support wall 31b extending forward from the lower end of the mounting wall 31a. It is configured. The support wall 31 b protrudes forward from the hose arrangement passage 28.

  On the upper surface of the support wall 31b of each clamp bracket 31, a hose clamp 32 that holds the first to third hydraulic hoses H1, H2, and H3 is disposed. This hose clamp 32 has a pair of upper and lower rubber clamp members 33A and 33B that sandwich hydraulic hoses H1, H2, and H3 from above and below, and a press plate 34 that is overlaid on the upper surface of the upper clamp member 33A. It is assembled and fixed to the support wall 31 b of the clamp bracket 31 by 35.

As shown in FIG. 8, an opening 36 positioned above the support wall 31 b of the clamp bracket 31 is formed in the upper wall portion 29 a of the passage forming member 29. The left opening 36 is formed by an open notch on the front and left sides. The right opening 36 is formed by an open notch in the front. The hose clamp 32 can be assembled to the clamp bracket 31 from the upper side through each opening 36, and the assemblability is good.

A hose clamp 32 similar to that described above is also disposed on the left side of the rear portion of the left vertical rib 25L and on the right side of the rear portion of the right vertical rib 25R. These hose clamps 32 are assembled to a clamp bracket 37 fixed on the frame substrate 24 (see FIG. 7).
As shown in FIG. 8, the front portion of the right end of the upper wall portion 29a of the passage forming member 29 is in contact with the left side surface on the rear end side of the right vertical rib 25R and welded to the right vertical rib 25R. It is fixed.

Further, as shown in FIG. 6, the rear end side of the left vertical rib 25L is superimposed on the upper surface on the left end side of the upper wall portion 29a of the passage forming member 29, and the passage is formed on the rear end side of the vertical rib 25L. The left end side of the upper wall portion 29a of the forming member 29 is fixed by welding.
Thus, the strength of the body frame 21 can be increased by fixing the left and right end portions of the passage forming member 29 to the rear portions of the longitudinal ribs 25L and 25R located on the same side in the left-right direction.

As shown in FIG. 8, three weight attachment members 38 for attaching the weights 22 are provided on the rear end side of the frame substrate 24 and fixed on the frame substrate 24 by welding.
The left weight attachment member 38L is disposed on the left side of the rear end side of the left vertical rib 25L, and the right front portion thereof is fixed by welding to the rear end side of the left vertical rib 25L.
The right weight attachment member 38R is disposed on the right side of the rear end side of the right vertical rib 25R, and the left front portion thereof is fixed by welding to the rear end side of the right vertical rib 25R. The right rear portion of the passage forming member 29 extends rightward and is welded and fixed to the left rear portion of the right weight attaching member 38R.

The middle weight attaching member 38 </ b> M is disposed in a notch 39 formed in the rear part of the midway portion in the left-right direction of the passage forming member 29, and is fixed to the passage forming member 29 by welding.
As shown in FIGS. 3 and 5, the fuselage frame 21 has a partition wall 41 that is arranged vertically so that the plate surface faces front and rear, closer to the rear than the center portion of the frame substrate 24 in the front and rear direction. The partition wall 41 is provided over the left and right direction of the frame substrate 24 so as to cross the left and right vertical ribs 25L and 25R. The engine E is mounted on the body frame 21 on the rear side of the partition wall 41.

A plurality of anti-vibration mounts 42 and 43 are provided before and after the engine E, respectively. In the present embodiment, two anti-vibration mounts 42 are provided on the front side of the engine E, and three anti-vibration mounts 43 are provided on the rear side of the engine E.
The body frame 21 is provided with engine support bases 44 and 45 for attaching front and rear anti-vibration mounts 42 and 43 provided on the engine E.

A front engine support base 44 for attaching the front vibration isolation mount 42 is fixed to the rear surface of the partition wall 41.
Of the three rear engine support bases 45L, 45R, 45M for attaching the rear vibration isolation mount 43, the right and middle rear engine support bases 45R, 45M are the upper wall portion of the passage forming member 29. It is fixed to the upper surface of 29a by welding. The left rear engine support 45L is bolted to a mounting plate 46 welded and fixed to the upper end of the left longitudinal rib 25L on the rear end side and the upper end of the right side of the left weight mounting member 38L.

  As shown in FIG. 4, a support frame 47 for attaching and supporting the cover device 17, peripheral members of the engine E, and the like is provided on the rear side of the partition wall 41. The support frame 47 includes a pair of left and right front columns 48L and 48R, a pair of left and right rear columns 49L and 49R, and a plate member 50 fixed to the upper ends of the columns 48L, 48R, 49L and 49R.

As shown in FIG. 5, the frame attachment member 51 </ b> L for attaching the lower end of the left front column 48 </ b> L is welded and fixed to the rear left side of the partition wall 41 and the upper surface of the frame substrate 24.
A frame attachment member 51R for attaching the lower end of the right front support 48R is welded and fixed to the upper end of the upper protruding portion 53 provided on the rear surface side of the right vertical rib 25R and the upper end of the partition wall 41. .

The frame attachment member 52L for attaching the lower end of the left rear column 49L is fixed to the left side of the upper surface of the upper wall 29a of the passage forming member 29 by welding.
The frame attachment member 52R for attaching the lower end of the right rear column 49R is welded and fixed to the upper end of the upper protrusion 54 provided on the rear end side of the right vertical rib 25L and the left upper end of the right weight attachment member 38R. ing.

  In the above configuration, the passage forming member 29 is provided between the rear engine support bases 45L, 45R, 45M and the frame substrate 24, and the hose disposing passage 28 formed by the passage forming member 29 is provided. By disposing the hydraulic hoses (in the present embodiment, the second and third hydraulic hoses H2 and H3), the engine E is disposed at an appropriate position and the hydraulic hoses (the first to third hoses are maintained while maintaining a good weight balance. The hydraulic hoses H1, H2, H3) can be arranged on the rear side of the engine E.

  Also, the rear engine support base (in this embodiment, the right and middle rear engine support bases 45R and 45M), the clamp bracket 31, and the frame attachment member (in this embodiment, the left rear frame attachment). The member 52L) can be fixed to the passage forming member 29 to form a sub-assembly, and the rear side engine support bases 45R and 45M, the clamp bracket 31 and the frame mounting member 52L are fixed to the frame. By fixing to the substrate 24, the body frame 21 can be easily manufactured.

10A and 10B show a modification.
In FIG. 10A, the passage forming member 29 includes an upper wall portion 29a, a rear vertical wall portion 29b extending downward from the rear end of the upper wall portion 29a, and an upper wall portion 29a. From the front vertical wall portion 29c extending downward from the front end of the front, an open U-shape is formed downward.
Further, the opening 36 for assembling the hose clamp formed in the upper wall portion 29a of the passage forming member 29 is constituted by a long hole that is long in the front-rear direction.

Other configurations are the same as those in the above embodiment.
In FIG. 10B, a reinforcing component 56 that reinforces the passage forming member 29 is added. The reinforcing component 56 includes an upper wall 56a, a vertical wall 56b extending downward from the front end of the upper wall 56a, and a mounting wall 56c extending forward from the lower end of the vertical wall 56b. The rear portion of the upper wall 56 a of the reinforcing component 56 is overlapped with the upper surface of the upper wall portion 29 a of the passage forming member 29 and fixed by bolts 57. The mounting wall 56 c of the reinforcing component 56 is fixed to the frame substrate 24 with bolts 57.

Other configurations are the same as those in the above embodiment.
In addition to the hydraulic hose, a control cable that interlocks and connects the electrical wiring and the operation member and the non-operation member may be passed through the hose arrangement passage 28.

21 Airframe Frame 24 Frame Board 25L Vertical Rib 25R Vertical Rib 28 Hose Arrangement Passage 29 Passage Forming Member 29a Upper Wall 29b Vertical Wall 31 Clamp Bracket 32 Hose Clamp 36 Opening 42 Anti-Vibration Mount 43 Anti-Vibration Mount 44 Engine Support Base 45L Engine support 45R Engine support 45M Engine support E Engine H1 Hydraulic hose H2 Hydraulic hose H3 Hydraulic hose P1 Hydraulic pump P2 Hydraulic pump V1 Control valve

Claims (4)

It has aircraft engine to the rear is mounted, to the body, control valve engine supporting base for mounting support the vibration damping mount which is provided before and after the engine is provided, which controls the oil pressure equipment on one of left and right sides of the machine body A hydraulic pump is provided on the engine side on the left and right other side of the machine body, and a hydraulic hose is provided from the hydraulic pump to the control valve,
A passage forming a hose disposition passage for disposing the hydraulic hose between a rear engine support base for mounting a vibration isolation mount on the rear side of the engine and a frame substrate constituting the bottom of the fuselage Providing a forming member ,
The passage forming member is fixed to the frame substrate by extending downward from at least one end side in front and rear of the upper wall portion that is disposed along the left-right direction with a space above the frame substrate. A vertical wall portion, and the lower portion of the upper wall portion is the hose arrangement passage, and the rear engine support base is fixed on the upper wall portion,
A clamp bracket to which a hose clamp for holding the hydraulic hose is fixed is fixed to the vertical wall portion of the passage forming member, and an opening for assembling the hose clamp to the clamp bracket from above on the upper wall portion of the passage forming member A working machine characterized by forming a part . A control valve that has an airframe on which the engine is mounted at the rear, an engine support base that attaches and supports vibration-proof mounts provided on the front and rear of the engine, and controls various hydraulic devices on the left and right sides of the airframe. A hydraulic pump is provided on the engine side on the left and right other side of the machine body, and a hydraulic hose is provided from the hydraulic pump to the control valve,
A passage forming a hose disposition passage for disposing the hydraulic hose between a rear engine support base for mounting a vibration isolation mount on the rear side of the engine and a frame substrate constituting the bottom of the fuselage Providing a forming member,
Said passage member, said has a upper wall portion above the frame substrate at intervals are arranged and along the horizontal direction, and a vertical wall portion fixed to the frame substrate, the upper wall The lower part is the hose arrangement passage ,
The working machine characterized in that the passage forming member is configured such that the vertical wall portion extends downward from the rear end of the upper wall portion and the hose disposition passage is open frontward . Working machine according to claim 1, characterized in that fixing the engine support base of the rear on the upper wall portion. The frame board has a pair of left and right vertical ribs arranged from the front part to the rear part and fixed on the frame board, and the passage forming member is arranged between the rear parts of the left and right vertical ribs. 2. The left end side of the channel member is fixed to the rear part of the vertical rib located on the left side, and the right end part side of the passage forming member is fixed to the rear part of the vertical rib located on the right side. The work machine according to any one of to 3 .

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