Hose routing structure and working machine

Abstract

To provide a hose routing structure capable of suppressing vibration and noise caused by pulsation of a hose.SOLUTION: The hose routing structure includes at least one hose, a partition having an opening for passing the hose therethrough, a grommet that is disposed at an interval from the partition and through which the hose is inserted, and a tubular hose cover that covers the periphery of the hose from the grommet over the partition, wherein the hose cover is attached to the peripheral edge portion of the opening in the partition at one end side attachment portion that is a portion on one end side in a cylinder axis direction of the hose, and is attached to the grommet at the other end side attachment portion that is a portion on the other end side of the one end side attachment portion so that the opening portion of the other end side attachment portion is blocked by the grommet, flexibility is provided between the one end side mounting part and the other end side mounting part.SELECTED DRAWING: Figure 11

Description

[Technical Field]

[0001] The present invention relates to a hose routing structure and a work machine. [Background technology]

[0002] BACKGROUND ART A working machine disclosed in Patent Document 1 is known in the prior art.

[0003] The work machine disclosed in Patent Document 1 is provided with a partition that separates the side where the hydraulic pump is located from the side where the control valve is located, and the hydraulic line that runs from the hydraulic pump to the control valve passes through the partition. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Japanese Patent Application Laid-Open No. 2017-066786 Summary of the Invention [Problem to be solved by the invention]

[0005] Incidentally, when routing a hydraulic hose from a hydraulic pump to a control valve through a partition, if a clamp is attached to the part of the partition through which the hydraulic hose passes and the hydraulic hose is fixed with this clamp so that its movement is restricted, it becomes difficult to absorb the pulsation of the hydraulic hose caused by the operation of the hydraulic pump, and problems arise in that vibrations and noise caused by the pulsation of the hydraulic hose are transmitted.

[0006] SUMMARY OF THE INVENTION In view of the above problems, an object of the present invention is to provide a hose routing structure and a work machine that can suppress vibrations and noise caused by hose pulsation. [Means for solving the problem]

[0007] A hose routing structure according to one aspect of the present invention comprises at least one hose, a partition having an opening for passing the hose, a grommet spaced apart from the partition and through which the hose is inserted, and a cylindrical hose cover that covers the periphery of the hose from the grommet to the partition, wherein the hose cover has a one-end mounting portion, which is a portion on one end side of the hose cover in the cylindrical axis direction, attached to the peripheral edge of the opening in the partition, and a other-end mounting portion, which is a portion opposite the one-end mounting portion, attached to the grommet so that the opening portion of the other-end mounting portion is blocked by the grommet, and the hose cover has flexibility between the one-end mounting portion and the other-end mounting portion. [Effects of the Invention]

[0008] According to the above-described hose routing structure, when a force is applied to the hose due to hose pulsation, the hose cover bends, allowing the hose to move due to the pulsation while dissipating vibrations caused by the hose pulsation, thereby suppressing vibrations and noise caused by the hose pulsation. [Brief explanation of the drawings]

[0009] [Figure 1] FIG. [Figure 2] FIG. 2 is a side view showing the hose routing structure. [Figure 3] FIG. 2 is a plan view showing the hose routing structure. [Figure 4] FIG. 2 is a perspective view of the revolving frame as seen from diagonally rear left. [Figure 5] FIG. [Figure 6] FIG. 4 is a perspective view showing a portion of the partition through which a hose is inserted. [Figure 7] FIG. 2 is an exploded perspective view of the mounting portion of the partition structure. [Figure 8] FIG. [Figure 9] FIG. 2 is a side cross-sectional view of the partition structure. [Figure 10]FIG. 2 is a plan cross-sectional view of the partition structure. [Figure 11] FIG. 2 is a side view of the mounting portion of the partition structure. [Figure 12] FIG. [Figure 13] FIG. [Figure 14] FIG. 2 is a front view of the mounting portion of the partition structure. [Figure 15] FIG. 10 is a rear view of the mounting portion of the partition structure. [Figure 16] A front view showing the state in which the pressure plate is placed in front of the partition structure. [Figure 17] FIG. 10 is a perspective view showing a state before a pressing plate is attached. [Figure 18] FIG. 4 is a cross-sectional view of a fixing portion of the pressing plate. [Figure 19] FIG. DETAILED DESCRIPTION OF THE INVENTION

[0010] Hereinafter, an embodiment of the present invention will be described with reference to the drawings as appropriate.

[0011] 1 is a schematic side view showing the overall configuration of a work machine 1 according to this embodiment. In this embodiment, the work machine 1 is exemplified by a backhoe, which is a rotating work machine.

[0012] As shown in Fig. 1, the work machine 1 includes a machine body (swivel base) 2, a traveling device 3, and a work device 4. A cabin 5 is mounted on the machine body 2. Inside the cabin 5, there is provided a driver's seat 6 where an operator sits. The driver's seat 6 is surrounded by the cabin 5.

[0013] In this embodiment, the work machine 1 is exemplified as a work machine 1 with a cabin specification, but the work machine 1 may also be a work machine 1 with a canopy specification that has a canopy (not shown) instead of a cabin 5.

[0014] In this embodiment, the direction toward the front of the operator seated in the driver's seat 6 of the work machine 1 (the direction of arrow A1 in Figure 1) is referred to as the forward direction (the front of the machine body), and the direction toward the rear of the operator (the direction of arrow A2 in Figure 1) is referred to as the rear direction (the rear of the machine body).

[0015] Also, the direction toward the left side of the operator (the front side of FIG. 1, the direction of arrow B1 in FIG. 3) is referred to as the left side, and the direction toward the right side of the operator (the back side of FIG. 1, the direction of arrow B2 in FIG. 3) is referred to as the right side.

[0016] Additionally, the horizontal direction perpendicular to the longitudinal direction (front-rear direction of the fuselage) K1 will be referred to as the fuselage width direction (left-right direction) K2 (see FIG. 3). The direction from the center of the fuselage 2 in the width direction toward the right or left will be referred to as the fuselage width outward direction. In other words, the fuselage width outward direction is the direction away from the center of the fuselage 2 in the width direction K2. The direction opposite to the fuselage width outward direction will be referred to as the fuselage width inward direction. In other words, the fuselage width inward direction is the direction approaching the center of the fuselage 2 in the width direction K2.

[0017] 1, in this embodiment, the traveling device 3 is a crawler type traveling device having a traveling frame 8 and crawler type traveling mechanisms 9 provided on the left and right of the traveling frame 8. A dozer device 7 is attached to the front of the traveling device 3.

[0018] The machine body 2 is mounted on a traveling frame 8 so as to be able to rotate freely to the left and right. More specifically, as shown in Figures 1 and 2, the machine body 2 has a swivel base plate 15, which is a base plate that forms the bottom of the machine body 2. The swivel base plate 15 is formed from a thick plate material and is arranged so that the plate surface faces up and down. The swivel base plate 15 is supported on the traveling frame 8 via a swivel bearing 16 so as to be able to rotate freely around an axis that extends up and down.

[0019] 3 and 4, the aircraft body 2 has a revolving frame 19 that includes the revolving base plate 15. The revolving frame 19 includes a support bracket 17 that is fixed to the front part of the revolving base plate 15 so as to protrude forward, and a pair of vertical ribs 18 that extend rearward from the left and right parts of the rear part of the support bracket 17 and are fixed to the revolving base plate 15.

[0020] 1, a swing bracket 11 is supported by the support bracket 17 so as to be rotatable about an axis extending in the vertical direction. A working device 4 is attached to the swing bracket 11.

[0021] As shown in Fig. 1, the working device 4 has a boom 26, a boom cylinder 27, an arm 28, an arm cylinder 29, a working implement (bucket) 30, and a working implement cylinder (bucket cylinder) 31. The boom 26 has a base rotatably connected to the swing bracket 11 so as to be able to swing up and down. The boom cylinder 27 drives the boom 26 to swing by extending and retracting. The arm 28 is rotatably connected to the tip of the boom 26 so as to be able to swing in the forward and backward direction K1. The arm cylinder 29 drives the arm 28 to swing by extending and retracting. The working implement 30 is rotatably connected to the tip of the arm 28. The implement cylinder 31 is configured to swing freely in the front-rear direction K1. The implement cylinder 31 swings and drives the implement 30 by extending and contracting. In this embodiment, the implement 30 is exemplified by a bucket.

[0022] As shown in Figures 2 and 3, a prime mover 23 composed of any type of engine, motor, or the like is mounted on the rear of the aircraft 2. In this embodiment, the prime mover 23 is a diesel engine. A hydraulic pump 24 is provided on the side of the prime mover 23 (on the left side in this embodiment). The hydraulic pump 24 is a pump unit composed of multiple pumps that discharge, for example, hydraulic oil for operating hydraulic actuators, pilot hydraulic oil for operating valves, and hydraulic oil for signals. Note that the hydraulic pump 24 may also be composed of a single pump. The hydraulic pump 24 is driven by the power of the prime mover 23.

[0023] As shown in Figures 3 and 4, a control valve V1 is attached to the swivel base plate 15. As shown in Figures 2 and 4, the control valve V1 is arranged in a space 78 below a space (cabin 6) where the driver's seat 6 is located on the front left side of the swivel base plate 15. Specifically, a step 14 that forms the floor of the space where the driver's seat 6 is located is supported on the swivel base plate 15 at a position spaced apart from the swivel base plate 15, and the control valve V1 is arranged in the space 78 between the swivel base plate 15 and the step 14.

[0024] The control valve V1 controls the flow rate of hydraulic oil discharged from the hydraulic pump 24. More specifically, the control valve V1 is a valve unit that aggregates multiple control valves that control the flow rate of hydraulic oil supplied to a hydraulic actuator driven by the hydraulic oil.

[0025] As shown in FIG. 2, the prime mover 23 is housed in a prime mover compartment 32. The prime mover compartment 32 is composed of a partition 33, a bulkhead 34, a bonnet 35, a weight 36, a swivel base plate 15, a swivel cover 38 (see FIG. 1), etc. The partition 33 covers the front of the lower part of the prime mover 23. The bulkhead 34 covers the front of the upper part of the prime mover 23 and the upper front part. The bonnet 35 covers the rear of the upper part of the prime mover 23 and the upper rear part. The weight 36 covers the rear of the lower part of the prime mover 23 and the rear side part of the lower part. The swivel base plate 15 covers the lower part of the prime mover 23. The swivel cover 38 partially covers the front side part of the lower part of the prime mover 23. Note that components other than those described above that form the prime mover compartment 32 are not shown in the illustration.

[0026] 4 and 5, the partition 33 is provided upright on the swivel base plate 15. The partition 33 extends in the body width direction K2. The left portion of the partition 33 protrudes leftward from the left end of the swivel base plate 15.

[0027] 2, 3, and 4, a control valve V1 is disposed in front of the left part of the partition 33 on the swivel base plate 15. Therefore, the partition 33 separates the side where the hydraulic pump 24 is disposed from the side where the control valve V1 is disposed.

[0028] Also, as shown in Figures 2 and 3, the hydraulic hose (hose) 41 that connects the hydraulic pump 24 and the control valve V1 (that is, that is routed between the hydraulic pump 24 and the control valve V1) is routed through the partition 33.

[0029] In this embodiment, as shown in FIGS. 2 and 3 , four (plural) hydraulic hoses 41 are illustrated as passing through the left portion of the partition 33. For example, two of the four hydraulic hoses 41, namely, 41A and 41B, are hydraulic hoses 41 that circulate main hydraulic oil, and the remaining two hydraulic hoses 41 are hydraulic hoses 41C and 41D for a load sensing system. The main hydraulic oil is hydraulic oil for driving hydraulic actuators such as hydraulic cylinders and hydraulic motors. The load sensing system controls the discharge volume of the hydraulic pump 24 in accordance with the load pressure of each hydraulic actuator equipped in the work machine 1, and discharges hydraulic power required for the load from the hydraulic pump 24. One of the two hydraulic hoses 41C and 41D for the load sensing system is hydraulic hose 41D that transmits the highest load pressure among the load pressures of the control valves in the load sensing system, and the other is hydraulic hose 41C that transmits the discharge pressure of the hydraulic pump 24. Therefore, the four hydraulic hoses 41 are hydraulic hoses 41 with large pulsations.

[0030] As shown in FIGS. 4 and 5, the partition 33 has a main plate 42 whose surface faces the front-rear direction K1. The main plate 42 is configured to have a first plate 42A, a second plate 42B, and a third plate 42C. The first plate 42A extends from the right part to the left end of the swivel base plate 15. The left part of the first plate 42A protrudes leftward from the left end of the swivel base plate 15. The second plate 42B is disposed outward (leftward) of the first plate 42A in the width direction of the aircraft. The third plate 42C is disposed above the second plate 42B.

[0031] As shown in FIGS. 4, 5, 6, and 11, the partition 33 has an opening 43 for passing the hydraulic hose 41. As shown in FIGS. 4, 5, and 6, the opening 43 is defined by a left portion of a first plate 42A and a second plate 42B. More specifically, as shown in FIGS. 6 and 7, a notch 43A that opens leftward is formed in the left portion of the first plate 42A. A notch 43B that opens rightward is formed in the second plate 42B. By butting the left end of the first plate 42A against the right end of the second plate 42B, the opening 43 is defined by the notch 43A of the first plate 42A and the notch 43B of the second plate 42B. The opening 43 has an elliptical shape that is elongated in the vertical direction when viewed from the front (in other words, the opening 43 has an elliptical shape formed by connecting two circles of equal radius by a common circumscribing line).

[0032] As shown in FIGS. 6 and 7, a first mounting piece 44 and a second mounting piece 45 are fixed to the second plate 42B. The first mounting piece 44 is fixed to the upper part of the rear surface of the second plate 42B. The second mounting piece 45 is fixed to the lower part of the rear surface of the second plate 42B. The right part of the first mounting piece 44 protrudes rightward from the second plate 42B and is attached to the first plate 42A with a bolt 46. The right part of the second mounting piece 45 also protrudes rightward from the second plate 42B and is attached to the first plate 42A with a bolt 47. This allows the second plate 42B to be detachably attached to the first plate 42A. The left part of the first mounting piece 44 is attached to the third plate 42C with a bolt 48. A third mounting piece 50, which is attached to the first plate 42A with a bolt 49, is fixed to the third plate 42C.

[0033] In the following description, peripheral edge 51 of opening 43 refers to the portion along the edge of opening 43 in partition 33, as shown in Figures 6 and 7. In other words, peripheral edge 51 is a region made up of first edge portion 51a, which is the portion along the edge of notch 43A in first plate 42A, and second edge portion 51b, which is the portion along the edge of notch 43B in second plate 42B.

[0034] Incidentally, when routing the hydraulic hose 41 through the opening 43 formed in the partition 33, it is necessary to block the opening 43 so that heat from the motor chamber 32 is not transmitted to the side where the control valve V1 is located, but in this case, for example, it is conceivable to block the opening 43 and attach a clamping device, through which the hydraulic hose 41 is inserted, to the peripheral portion 51 of the opening 43, and fix the hydraulic hose 41 with the clamping device so that the movement of the hydraulic hose 41 is restrained. However, doing so makes it difficult to absorb the pulsation of the hydraulic hose 41 that occurs when the hydraulic pump 24 is driven, and problems arise in that vibrations and noise caused by the pulsation of the hydraulic hose 41 are transmitted.

[0035] Therefore, in this embodiment, a partition structure 54 is provided that can separate the arrangement side 52 (motor chamber 32) of the hydraulic pump 24 from the arrangement side 53 of the control valve V1 while allowing movement caused by pulsation of the hydraulic hose 41. By allowing movement of the hydraulic hose 41 due to pulsation, this partition structure 54 can release vibrations caused by pulsation of the hydraulic hose 41 and suppress vibrations and noise caused by pulsation of the hydraulic hose 41. Furthermore, the partition structure 54 can separate the arrangement side 52 of the hydraulic pump 24 from the arrangement side 53 of the control valve V1 while allowing movement of the hydraulic hose 41 due to pulsation.

[0036] The following provides a detailed description of the partition structure 54. In this embodiment, the partition structure 54 is disposed on the side 52 on which the hydraulic pump 24 is disposed.

[0037] As shown in FIG. 8, the partition structure 54 has a grommet 56, a hose cover 57, a fixture 58, and a pressing plate 59.

[0038] As shown in Fig. 8, the grommet 56 is made of an elastic material such as rubber. The hydraulic hose 41 is inserted through the grommet 56 (see Fig. 7). The grommet 56 has a body portion 56a whose front cross section is an ellipse that is long in the up-down direction and has a predetermined thickness in the front-rear direction K1, and a first convex ridge portion 56b that protrudes in a convex shape from the front of the body portion 56a around the entire outer periphery. and a second ridge portion 56c formed to protrude in a convex shape from the rear of the body portion 56a around the entire outer periphery. Therefore, an annular groove is formed between the first ridge portion 56b and the second ridge portion 56c on the outer periphery of the grommet 56. The first ridge portion 56b and the second ridge portion 56c have an elliptical shape (or an oval shape) that is long in the vertical direction when viewed from the front.

[0039] As shown in Fig. 8, the grommet 56 (body portion 56a) has a plurality of hose insertion holes 60 formed to penetrate in the front-rear direction K1. The plurality of hose insertion holes 60 are formed in four, corresponding to the number of hydraulic hoses 41. The four hose insertion holes 60 are formed to have hole diameters corresponding to the thicknesses of the hydraulic hoses 41 to be inserted. The four hose insertion holes 60 are also formed to be aligned at intervals in the up-down direction.

[0040] 8, the grommet 56 has slits 61 formed in correspondence with each hose insertion hole 60. The slits 61 are formed from the inner surface of the hose insertion hole 60 to the outer surface of the grommet 56. Therefore, by widening the spacing between the slits 61, the hydraulic hose 41 can be inserted into the hose insertion hole 60 via the slits 61, and this allows the hydraulic hose 41 to be inserted into the grommet 56.

[0041] 8, 9, and 10, the hose cover 57 is made of an elastic material such as rubber and is formed into a cylindrical shape having a cylindrical axis X1 extending in the front-rear direction K1. The hose cover 57 is formed into a cylindrical shape with openings at both ends in the direction of the cylindrical axis X1 (front-rear direction K1). The hose cover 57 is formed into an elliptical cylindrical shape that is long in the up-down direction.

[0042] As shown in Figures 11, 12, and 13, the hose cover 57 has a one-end mounting portion 62 which is a portion on one end side in the direction of the cylindrical axis X1 (the front portion in this embodiment), an other-end mounting portion 63 which is a portion on the opposite side from the one-end mounting portion 62 (the other end side in the direction of the cylindrical axis X1, the rear portion in this embodiment), and an intermediate cylindrical portion 64 which is a portion between the one-end mounting portion 62 and the other-end mounting portion 63.

[0043] 9, 10, and 11, the one-end attachment portion 62 is attached to the peripheral edge 51 of the opening 43 in the partition 33. More specifically, the one-end attachment portion 62 has a tubular portion 62a and a pair of front and rear flange portions 62b, 62c that sandwich the peripheral edge 51 of the opening 43. The tubular portion 62a is formed in an elliptical cylindrical shape that is long in the vertical direction, and both ends in the direction of the tubular axis X1 are open.

[0044] 14 and 15, the cylindrical portion 62a has an outer peripheral shape that generally matches the inner peripheral shape of the opening 43. As shown in FIG. 14, the front flange portion 62b (the flange portion opposite the flange portion 62c on the other end mounting portion 63 side) is formed to protrude outward from the front portion of the cylindrical portion 62a around the entire outer periphery. As shown in FIG. 15, the rear flange portion 62c is formed to protrude outward from the rear portion of the cylindrical portion 62a. The rear flange portion 62c is formed to have a shape in which a portion corresponding to the first mounting piece 44 is cut out so as not to interfere with the first mounting piece 44.

[0045] Here, a procedure for attaching the one-end mounting portion 62 to the peripheral edge portion 51 of the opening 43 will be described. To attach the one-end mounting portion 62 to the peripheral edge portion 51 of the opening 43, first, as shown in FIG. 7, with the second plate 42B removed from the first plate 42A, the right outer surface of the tubular portion 62a of the one-end mounting portion 62 is brought into contact with the edge of the notch 43A, and the first edge portion 51a of the first plate 42A is sandwiched between the front and rear flange portions 62b, 62c (see FIG. 10). Next, the edge of the notch 43B of the second plate 42B is brought into contact with the left outer surface of the tubular portion 62a of the one-end mounting portion 62. As a result, the second edge portion 51b of the second plate 42B is sandwiched between the front and rear flange portions 62b, 62c (see FIG. 10). Thereafter, the first mounting piece 44 and the second mounting piece 45 are bolted to the first plate 42A. This allows the one end side mounting portion 62 to be mounted to the peripheral edge portion 51 of the opening 43 .

[0046] 9 and 10 , the other-end mounting portion 63 is formed in a cylindrical shape with both ends in the direction of the cylindrical axis X1 being open, and is attached to the grommet 56 so that the opening 65 of the other-end mounting portion 63 is closed by the grommet 56. By closing the opening 65 of the other-end mounting portion 63 with the grommet 56, the side 52 where the hydraulic pump 24 is disposed and the side 53 where the control valve V1 is disposed can be separated. More specifically, by inserting the grommet 56 into the other-end mounting portion 63 and fixing the other-end mounting portion 63 to the grommet 56 with a fixing device 58 (see FIG. 11 ), the opening 65 of the other-end mounting portion 63 is closed and the other-end mounting portion 63 is attached to the grommet 56. More specifically, the other end mounting portion 63 has an intermediate portion 63c between the front portion 63a and the rear portion 63b, which is formed as an annular recess that is recessed around the entire circumference toward the inside of the tube more than the outer surfaces of the front portion 63a and the rear portion 63b, and the shape of the inner surface is formed to roughly match the shape of the outer surface of the grommet 56.

[0047] As shown in Fig. 8, the fixing device 58 includes a band 66 and a fastener 67. The band 66 includes a band main body 66a that fits circumferentially around the outer periphery of the intermediate portion 63c of the other-end mounting portion 63, a first extension portion 66b that extends from one end of the band main body 66a, and a second extension portion 66c that extends from the other end of the band main body 66a. The fastener 67 includes a bolt 67A and a nut 67B that is fixed to the first extension portion 66b. The bolt 67A is inserted through the first extension portion 66b and the second extension portion 66c and threaded into the nut 67B and tightened, thereby fixing the other-end mounting portion 63 to the grommet 56.

[0048] As shown in Figures 9 and 10, the intermediate cylindrical portion 64 is formed in a bellows cylindrical shape. More specifically, the intermediate cylindrical portion 64 has a plurality of ridges 64a and valleys 64b arranged alternately in the direction of the cylindrical axis X1. The ridges 64a are formed as annular ridges that are convex outward in the circumferential direction of the intermediate cylindrical portion 64. The valleys 64b are formed as annular grooves that are concave inward in the circumferential direction of the intermediate cylindrical portion 64, and connect adjacent ridges 64a. The front end of the intermediate cylindrical portion 64 is connected to the cylindrical portion 62a of the one-end mounting portion 62, and the rear end of the intermediate cylindrical portion 64 is connected to the other-end mounting portion 63.

[0049] The hydraulic hose 41 moves due to pulsation, displacing mainly in the vertical direction. The intermediate cylindrical portion 64 flexes to allow the movement of the hydraulic hose 41 due to this pulsation. In other words, the hose cover 57 has flexibility that allows the movement of the hydraulic hose 41 due to pulsation between the one-end mounting portion 62 and the other-end mounting portion 63.

[0050] When the hydraulic hose 41 is displaced in the up-and-down direction due to pulsation, for example, when the hydraulic hose 41 is displaced upward, the grommet 56 and the other-end side mounting portion 63 are displaced upward together with the hydraulic hose 41, and in response to this, the intermediate tubular portion 64 bends so as to allow the upward displacement of the grommet 56 and the other-end side mounting portion 63. This allows the hydraulic hose 41 to move due to pulsation.

[0051] As shown in Fig. 8, the pressure plate 59 is disposed on one end side (front end side) of the hose cover 57. As shown in Figs. 8, 16 and 17, the pressure plate 59 has a pressure plate main body 70, a collar 69 and a restricting portion 68. The pressure plate main body 70 is made of a hard plate material such as metal and is formed in a C-shape that opens to the left.

[0052] This allows the pressure plate 59 to be positioned on the front side of the hose cover 57 from the side (left side) of the hydraulic hose 41. The pressure plate body 70 is positioned so as to abut against the front surface of the front flange portion 62b of the one-end mounting portion 62.

[0053] The collars 69 are provided on the upper and lower parts of the left part of the pressure plate body 70. The pressure plate body 70 (pressure plate 59) is attached to the partition 33 by bolts 72 that pass through the collars 69 and are fixed to the partition 33.

[0054] 18, the collar 69 penetrates the presser plate main body 70 and is fixed to the presser plate main body 70 by welding or the like. The collar 69 is also inserted into an insertion hole 71 formed in the front flange portion 62b. A bolt 72 is inserted into the collar 69 from the front and screwed into a screw hole (a hole with an internal thread) 73 formed in the second plate 42B, whereby the presser plate 59 can press the front flange portion 62b against the peripheral portion 51 of the opening 43 in the partition 33. This makes it possible to suppress movement of the one-end mounting portion 62 when the hydraulic hose 41 is displaced by pulsation and the hose cover 57 is elastically deformed as a result.

[0055] Furthermore, when the front flange portion 62b is pressed against the peripheral edge portion 51 of the opening 43 by the pressing plate 59, the front flange portion 62b is crushed by a predetermined amount by the pressing plate 59, but the collar 69 abuts against the partition 33 (second plate 42B), so that the crushing margin 74 (see FIG. 18) of the front flange portion 62b can be made constant by the collar 69. When the bolts 72 are tightened, the amount of compression of the front flange portion 62b by the presser plate 59 is kept constant, so that the tightening torque when the bolts 72 are tightened can be kept constant.

[0056] The restricting portion 68 restricts the one-end mounting portion 62 from moving inward of the hose cover 57 when the hose cover 57 elastically deforms in response to vertical displacement of the hydraulic hose 41 due to pulsation. In this embodiment, a plurality of restricting portions 68 are provided. Each restricting portion 68 includes a pair of upper and lower pins 68A, 68B and a plate member 68C. The upper pin 68A is fixed to the underside of the upper right portion of the pressure plate main body 70. The lower pin 68B is fixed to the upper side of the lower right portion of the pressure plate main body 70. In this embodiment, the pressure plate 59 (pressure plate main body 70) is fixed by a bolt at the left portion but not at the right portion, which raises the concern that the one-end mounting portion 62 may move inward of the hose cover 57 at the right portion of the pressure plate main body 70. The pair of pins 68A, 68B restrict the movement of the one-end mounting portion 62, which may move inward of the hose cover 57.

[0057] As shown in FIG. 16 , the plate member 68C is disposed between the upper and lower collars 69 on the left side of the pressure plate body 70. As shown in FIG. 10 , the plate member 68C is L-shaped and includes a first portion 68Ca fixed to the front surface of the pressure plate body 70 and a second portion 68Cb extending rearward from the right end of the first portion 68Ca. The second portion 68Cb is positioned inside the one-end mounting portion 62 and can prevent the one-end mounting portion 62 from moving inward. In this embodiment, the pressure plate body 70 is fixed at the upper and lower portions of the left side with bolts 72. This raises a concern that the one-end mounting portion 62 may move inwardly of the hose cover 57 at the center of the left side of the pressure plate body 70 in the vertical direction. The plate member 68C can prevent the one-end mounting portion 62 from moving inwardly of the hose cover 57.

[0058] As shown in FIG. 2 , the work machine 1 is equipped with a contact prevention member 75 that prevents the multiple hydraulic hoses 41 from contacting each other due to pulsation. The contact prevention member 75 is disposed on the side opposite the side on which the grommet 56 is disposed, with the partition 33 as a boundary. In this embodiment, the grommet 56 is disposed on the side 52 on which the hydraulic pump 24 is disposed, and therefore the contact prevention member 75 is disposed on the side 53 on which the control valve V1 is disposed, i.e., in front of the partition 33. In this embodiment, there is a concern that when the multiple hydraulic hoses 41 move due to pulsation, the hydraulic hoses 41 may come into contact with each other on the side 53 on which the control valve V1 is disposed, where the grommet 56 is not disposed. In this embodiment, the contact prevention member 75 prevents the hydraulic hoses 41 from contacting each other on the side 53 on which the control valve V1 is disposed, where the grommet 56 is not disposed.

[0059] The contact prevention member 75 is made of rubber or the like. As shown in FIG. 19 , the contact prevention member 75 has an elliptical shape that is long in the up-down direction and has a predetermined width in the front-rear direction K1. The contact prevention member 75 has a plurality of hose insertion holes 76 that are formed to penetrate in the front-rear direction K1. Four of the plurality of hose insertion holes 76 are formed, corresponding to the number of hydraulic hoses 41. The four hose insertion holes 76 are formed with hole diameters that correspond to the thicknesses of the four hydraulic hoses 41. The four hose insertion holes 76 are also formed to be aligned at intervals in the up-down direction. The contact prevention member 75 has slits 77 formed corresponding to each hose insertion hole 76. The slits 77 are formed from the inner surface of the hose insertion hole 76 to the outer surface of the contact prevention member 75. Therefore, by widening the spacing between the slits 77, the hydraulic hose 41 can be inserted into the hose insertion hole 76 through the slits 77, and the hydraulic hose 41 can be inserted into the contact prevention member 75.

[0060] In this embodiment, the partition structure 54 is disposed on the side 52 where the hydraulic pump 24 is disposed, but this is not limited thereto, and the partition structure 54 may be disposed on the side 53 where the control valve V1 is disposed. The partition structure 54 may also be disposed on both the side 52 where the hydraulic pump 24 is disposed and the side 53 where the control valve V1 is disposed. The number of hydraulic hoses 41 routed through the partition structure 54 does not have to be multiple; it may be one. That is, it is sufficient that at least one hydraulic hose 41 is routed through the partition structure 54. The hose 41 routed through the partition structure 54 does not have to be a hydraulic hose 41, and the partition structure 54 (the hose routing structure of this embodiment) can be used for a hose 41 whose behavior is caused by pulsation. Furthermore, the portion of the hose cover 57 between the one end side mounting portion 62 and the other end side mounting portion 63 is not limited to a bellows-shaped tube, as long as it has flexibility that allows movement due to pulsation of the hydraulic hose (hose) 41. Furthermore, in this embodiment, the four hydraulic hoses 41 are arranged side by side in the vertical direction in the portion where the grommet 56 passes, but this is not limited to this. The four hydraulic hoses 41 may be arranged, for example, so as to be positioned at the vertices of a rectangle in the portion where the grommet 56 passes. Therefore, the shape of the grommet 56 is not limited to the shape in the above embodiment. The same applies to the contact prevention member 75.

[0061] A preferred embodiment of the present invention provides a work machine 1 as described in the following items. (Item 1) a partition (33) having an opening (43) for passing the hose (41); a grommet (56) arranged at a distance from the partition (33) and through which the hose (41) is inserted; and a cylindrical hose cover (57) covering the periphery of the hose (41) from the grommet (56) to the partition (33), wherein the hose cover (57) has a one-end attachment portion (62) which is a portion on one end side of the hose cover (57) in a cylindrical axis line (X1) direction, attached to a peripheral portion (51) of the opening (43) in the partition (33), and a other-end attachment portion (63) which is a portion opposite to the one-end attachment portion (62) is attached to the grommet (56) such that an opening portion (65) of the other-end attachment portion (63) is closed by the grommet (56), and the hose routing structure has flexibility between the one-end attachment portion (62) and the other-end attachment portion (63).

[0062] According to the hose routing structure of this item 1, when a force is applied to the hose 41 due to pulsation of the hose 41, the hose cover 57 bends, thereby allowing the hose 41 to move due to the pulsation while dissipating vibrations caused by the pulsation of the hose 41. This makes it possible to suppress vibrations and noise caused by the pulsation of the hose 41. (Item 2) 2. The hose routing structure according to item 1, wherein a portion of the hose cover 57 between the one end side mounting portion 62 and the other end side mounting portion 63 is formed in a bellows cylindrical shape.

[0063] According to the hose routing structure according to item 2, the hose cover 57 can smoothly follow the movement of the hose 41 due to pulsation. (Item 3) 3. The hose routing structure according to item 1 or 2, further comprising a pressing plate 59 arranged on the one end side of the hose cover 57, the one end side mounting portion 62 having a pair of flange portions 62b, 62c sandwiching the peripheral portion 51, and the pressing plate 59 attached to the partition so as to press the flange portion 62b opposite to the flange portion 62c on the other end side mounting portion 63 side against the peripheral portion 51.

[0064] According to the hose routing structure according to item 3, when the hose cover 57 is deformed in accordance with the movement of the hose 41, the movement of the one-end side attachment portion 62 can be suppressed. (Item 4) Item 4. The hose routing structure according to item 3, wherein the pressing plate (59) has a restricting portion (68) that restricts the one end side mounting portion (62) from moving toward the inside of the hose cover (57).

[0065] According to the hose routing structure of item 4, when the hose cover 57 is deformed in accordance with the movement of the hose 41, the one-end attachment portion 62 can be prevented from moving inward of the hose cover 57. (Item 5) The hose routing structure according to any one of items 1 to 3, further comprising a contact prevention member 75 arranged on the opposite side of the partition 33 from the side on which the grommet 56 is arranged, wherein a plurality of the hoses 41 are provided, and the contact prevention member 75 prevents the plurality of hoses 41 from contacting each other.

[0066] According to the hose routing structure according to item 5, when the hoses 41 move due to pulsation, it is possible to prevent the hoses 41 from coming into contact with each other. (Item 6) A work machine 1 equipped with the hose routing structure according to any one of items 1 to 5.

[0067] According to the work machine 1 relating to this item 6, vibrations and noises in the work machine 1 caused by pulsation of the hose 41 can be suppressed. (Item 7) Item 7. The work implement 1 according to item 6, comprising a hydraulic pump 24 and a control valve V1 that controls the flow rate of hydraulic oil discharged from the hydraulic pump 24, wherein the partition 33 separates a side 52 where the hydraulic pump 24 is arranged from a side 53 where the control valve V1 is arranged, and the hose 41 is a hydraulic hose 41 that connects the hydraulic pump 24 and the control valve V1.

[0068] According to the work machine 1 relating to this item 7, it is possible to suppress vibrations and noise caused by pulsation in the hydraulic hose 41 connecting the hydraulic pump 24 and the control valve V1. (Item 8) Item 8. The work implement (1) according to item 7, wherein the grommet (56) is arranged on the side (52) where the hydraulic pump (24) is arranged, and the hose cover (57) covers the hose (41) on the side where the hydraulic pump (24) is arranged.

[0069] The pulsation of the hydraulic hose 41 is greater closer to the hydraulic pump 24, but according to the work machine 1 relating to this item 8, by restraining the hydraulic hose 41 with a grommet 56 and a hose cover 57 on the side 52 where the hydraulic pump 24 is located, the transmission of noise and vibration caused by the pulsation of the hydraulic hose 41 can be more effectively suppressed. (Item 9) The work machine 1 described in item 7 or 8, wherein the control valve V1 is arranged in a space 78 below the driver's seat 6, and the hydraulic pump 24 is arranged in an external space of the lower space 78 separated by the partition 33.

[0070] According to the work machine 1 relating to this item 9, it is possible to separate the space below the driver's seat 6 from the space outside the space below the driver's seat 6 while allowing movement due to pulsation of the hose 41 routed between the space below the driver's seat 6 and the space outside the space below the space below the space 78.

[0071] Although one embodiment of the present invention has been described above, the embodiment disclosed herein should be considered to be illustrative in all respects and not restrictive. The scope of the present invention is defined by the claims, not by the above description, and is intended to include all modifications within the meaning and scope of the claims. [Explanation of symbols]

[0072] 1 Work equipment 24 Hydraulic pump 33 Divider 41 Hose (hydraulic hose) 43 Aperture 51 Periphery 52 Hydraulic pump placement side 53 Control valve placement side 56 Grommet 57 Hose cover 59 Retaining plate 62 One end mounting part 62b Flange 62c flange 63 Other end mounting part 65 Opening part 68 Regulatory Department 75 Contact prevention member X1 cylinder axis V1 Control Valve

Claims

1. at least one hose; a partition having an opening for passing the hose; a grommet disposed at a distance from the partition and through which the hose is inserted; a cylindrical hose cover that covers the periphery of the hose from the grommet to the partition; Equipped with The hose cover has a one-end mounting portion, which is a portion on one end side of the hose cover in the tube axis direction, attached to the peripheral edge of the opening in the partition, and an other-end mounting portion, which is a portion opposite the one-end mounting portion, attached to the grommet so that the opening portion of the other-end mounting portion is blocked by the grommet, thereby providing a hose routing structure that is flexible between the one-end mounting portion and the other-end mounting portion.

2. 2. The hose routing structure according to claim 1, wherein a portion of the hose cover between the one end mounting portion and the other end mounting portion is formed in a bellows-like cylindrical shape.

3. a pressing plate disposed on the one end side of the hose cover, the one-end attachment portion has a pair of flange portions that sandwich the peripheral edge portion, 3. The hose routing structure according to claim 1, wherein the retainer plate is attached to the partition so as to press the flange portion opposite to the flange portion on the other end side of the attachment portion against the peripheral edge portion.

4. 4. The hose routing structure according to claim 3, wherein the retainer plate has a restricting portion that restricts the one end side mounting portion from moving toward the inside of the hose cover.

5. a contact prevention member disposed on the opposite side of the partition from the side on which the grommet is disposed, A plurality of the hoses are provided, 3. The hose routing structure according to claim 1, wherein the contact prevention member prevents the plurality of hoses from contacting each other.

6. A work machine comprising the hose routing structure according to claim 1 or 2.

7. A hydraulic pump, a control valve for controlling the flow rate of hydraulic oil discharged from the hydraulic pump; Equipped with the partition separates a side where the hydraulic pump is disposed from a side where the control valve is disposed, 7. The work machine according to claim 6, wherein the hose is a hydraulic hose that connects the hydraulic pump and the control valve.

8. the grommet is disposed on a side where the hydraulic pump is disposed, The work machine according to claim 7, wherein the hose cover covers the hose on the side where the hydraulic pump is disposed.

9. The control valve is disposed in a space below the driver's seat, The work machine according to claim 7, wherein the hydraulic pump is disposed in an external space of the lower space separated by the partition.

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