JP6719116B2 - Work machine - Google Patents

Description

The present invention relates to a working machine in which a revolving structure is provided on a traveling structure, and more particularly to a working machine capable of improving the efficiency of disassembling and connecting the revolving structure and the traveling structure.

Many work machines such as hydraulic excavators that operate on construction machines are provided with a revolving structure to which the working machine is attached so as to be revolvable above the traveling structure. In this type of work machine, the hydraulic pump and the prime mover that drives it are mounted on a revolving structure, and hydraulic piping for supplying the pressure oil discharged from the hydraulic pump to the corresponding hydraulic actuator is laid around the machine. There is. At this time, since the revolving structure revolves with respect to the traveling structure, the hydraulic piping connected to the hydraulic actuator arranged on the traveling structure passes through the swivel joint arranged at the revolving center of the revolving structure (see Patent Document 1, etc.). ).

JP, 2012-31598, A

Generally, the swivel joint is supported by the frame of the traveling body, and the pipes on the revolving body side must be removed from the swivel joint when the revolving body is separated from the traveling body due to disassembly or the like. However, many structures such as a prime mover, hydraulic pump, operator's cab, and various tanks are densely laid out on the revolving structure, and it is laborious to put a hand in a narrow space and remove many hydraulic pipes from the swivel joint. Requires. Especially in small hydraulic excavators, the driver's seat is located above the swivel joint, so it is necessary to remove the driver's seat and its surrounding parts as preparatory work to access the swivel joint. Requires man-hours.

An object of the present invention is to provide a working machine that can facilitate the work of separating and connecting a revolving structure to a traveling structure.

In order to achieve the above object, the present invention provides a traveling body having a track frame, a revolving structure provided on the upper part of the traveling structure so as to be revolvable via a revolving wheel, a working machine attached to the revolving structure, and the revolving structure. A hydraulic pump provided in the vehicle, a prime mover for driving the hydraulic pump, a swivel joint connecting the hydraulic actuator provided in the traveling body and the hydraulic pump , and a hydraulic pressure connecting the hydraulic actuator provided in the traveling body and the swivel joint. In a working machine provided with piping , interposed between the revolving structure and the traveling structure, the upper part is connected to the lower part of the revolving wheel, and the lower part is detachably fixed to the upper part of the track frame , A joint support rotatable relative to the revolving structure is provided, and the joint support includes a cylindrical peripheral body portion, a bottom plate portion passing through a center of the peripheral body portion, and a flange provided at a lower end of the peripheral body portion. The bottom plate portion supports the swivel joint, and is connected to the upper portion of the track frame with a bolt through the flange, and the hydraulic pipe includes a joint side pipe connected to the swivel joint and the hydraulic pressure. An actuator side pipe connected to an actuator, and a pipe joint for connecting the joint side pipe and the actuator side pipe are provided, and the pipe joint is removed to disconnect the joint side pipe and the actuator side pipe, and the bolt. A work machine configured such that the connection between the revolving structure and the traveling structure can be released by removing the connection between the track frame and the joint support .

According to the present invention, by supporting the swivel joint with the joint support interposed between the revolving structure and the traveling structure, if the connection between the joint support and the traveling structure is released, the swivel joint is supported by the revolving structure. The connection between the traveling body and the revolving structure is released. Accordingly, when the revolving structure is separated from the traveling structure, the hydraulic pipe is disconnected between the hydraulic actuator mounted on the traveling structure and the swivel joint. Since the hydraulic piping can be disconnected on the side of the traveling body that is easily accessible, the work of separating the revolving structure from the traveling body can be easily performed. Similarly, the work of connecting the revolving structure to the traveling structure is easy.

Left side view of a working machine according to an embodiment of the present invention 1 is a perspective view of the work machine shown in FIG. Front view of the working machine shown in FIG. 1 is a side sectional view showing a support structure of a swivel joint provided in the work machine shown in FIG. 1 together with a frame structure of a traveling body. Sectional view taken along the line V-V in FIG. 1 is a cross-sectional view of a main part of the working machine shown in FIG. 1 in which a revolving structure is connected to a traveling structure 1 is a sectional view of the main part of the working machine shown in FIG. 1 with the revolving structure separated from the traveling structure. The figure corresponding to FIG. 6 of the conventional working machine with the revolving structure connected to the traveling structure. The figure corresponding to FIG. 7 of the conventional working machine in which the revolving structure is separated from the traveling structure.

Embodiments of the present invention will be described below with reference to the drawings.

1. Working Machine Here, a working machine according to an embodiment of the present invention will be described by taking a small hydraulic excavator (so-called rear ultra-small turning machine) as an example. In the present specification, the front, rear, left, and right are determined with the posture of the operator sitting in the driver's seat as a reference, and the directions corresponding to the left and right in FIG. 1 are the front and rear of the work machine, and the front and back directions orthogonal to the plane of the drawing. Are treated as left and right.

1 is a side view of a work machine according to an embodiment of the present invention, FIG. 2 is a perspective view seen from the left front, and FIG. 3 is a front view. FIG. 4 is a side sectional view showing a support structure of a swivel joint to be described later together with a frame structure of a traveling body, and FIG. 5 shows a sectional view taken along the line VV in FIG. 4 together with a swivel joint and hydraulic pipes connected to the swivel joint. It is a figure. Note that FIG. 4 corresponds to the arrow IV-IV in FIG. The work machine includes a traveling body 10, a swing body 20, and a work machine 40. The working machine 40 is not shown in FIGS. 2 and 3.

2. Traveling Body The traveling body 10 includes left and right traveling devices 11 and a center frame 12. The left and right traveling devices 11 are of a crawler type and each include a side frame 11a, a driven wheel 11b, a driving wheel 11c, a traveling motor 11d (FIG. 4 and the like), a speed reducer 11e, and a crawler track 11f. The left and right side frames 11a extend in the traveling direction, and support the driven wheel 11b on one side (left side in FIG. 1) in the longitudinal direction and the drive wheel 11c on the other side (right side in FIG. 1). The traveling motor 11d is supported on the other side in the longitudinal direction of the left and right side frames 11a, and the output shaft thereof is connected to the drive wheels 11c via a speed reducer 11e. In the left and right traveling devices 11, crawler belts 11f are wound around the driven wheels 11b and the driving wheels 11c, respectively. When the traveling motor 11d is driven, rotational power is transmitted to the drive wheels 11c via the speed reducer 11e, and the crawler belt 11f is circulated between the drive wheels 11c and the driven wheels 11b.

The center frame 12 connects the left and right traveling devices 11 (side frames 11a) and supports the revolving structure 20 at the upper part. The center frame 12 constitutes a frame of the traveling body 10, that is, a track frame together with the left and right side frames 11a. The center frame 12 is provided with an earth discharging device 13. The earth removing device 13 includes a blade lifting cylinder 13a (FIG. 2 and the like) and a blade 13b (not shown in FIGS. 2 and 3). The blade elevating cylinder 13a is connected to one side (left side in FIG. 1) of the center frame 12 in the traveling direction, and the blade 13b is moved up and down via a link mechanism in accordance with expansion and contraction operation. Although not described in detail, the working machine according to the present embodiment may be provided with a mechanism for adjusting the distance between the left and right traveling devices 11 with a hydraulic cylinder. In that case, the center frame 12 has a left and right width. Has a variable structure. For example, widening the space between the left and right traveling devices 11 improves the stability of the machine body during work, etc., and narrowing it enables traveling in a narrow passage and transportation by a small truck.

3. Revolving structure The revolving structure 20 includes a revolving frame 21, a counterweight 22, a seat base 23, a driver's seat 24, a floor panel 25, and the like. The revolving frame 21 is a basic support structure for the revolving structure 20, and is rotatably provided above the traveling structure 10 via a revolving wheel 26. In the area on the rear side of the revolving frame 21, devices such as an engine 29 (see a broken line in FIG. 1) and a hydraulic pump (not shown) driven by the engine 29 are mounted. In the present embodiment, the case where the engine 29 (internal combustion engine) is used as a prime mover for driving the hydraulic pump is illustrated, but an electric motor may be used instead of the engine 29. A hydraulic oil tank and a fuel tank (both not shown) are mounted on the front right part of the revolving frame 21, and these are covered with a tank cover 27. A support bracket 31 is provided on the front side portion of the revolving frame 21. A swing post 37 is connected to the support bracket 31 via a vertical shaft. The swing post 37 is rotated right and left by a swing cylinder (not shown). The counter weight 22 is a weight for balancing with the work machine 40, and is provided at the rear edge of the revolving frame 21 so as to extend vertically. The turning radius of the trailing edge of the counterweight 22 is the rear turning diameter of the working machine, but the working machine of the present embodiment is a small model, and the rear turning diameter is suppressed to about the width of the traveling body 10.

The seat base 23 is supported by the swivel frame 21 so as to be positioned in front of the counterweight 22. The seat base 23 also serves as an engine cover and covers devices such as the engine 29 and a hydraulic pump, and supports devices such as the counter frame 22 and the driver's seat 24 necessary for operating the working machine together with the revolving frame 21. The support 30 is configured. The outer periphery of the support 30 is covered with an outer cover 28. The driver's seat 24 is fixedly installed on the seat base 23. The floor panel 25 is located in front of the seat base 23 and the driver's seat 24, and forms an entry/exit passage for the operator. Below the floor panel 25, a control valve unit 36 (in FIG. 1) for controlling the direction and flow rate of the pressure oil supplied from the hydraulic pump to the hydraulic actuators mounted on the working machine such as the traveling motor 11d. (Refer to the broken line) is arranged.

A traveling lever/pedal device 32 for operating the left and right traveling devices 11 is arranged at a front portion of the floor panel 25. On the left and right of the driver's seat 24 on the seat base 23, left and right operation lever devices 33 for operating the work machine 40 and the swing structure 20 are arranged. A blade elevating lever 34 for operating the soil discharging device 13 is disposed on the right side of the right operating lever device 33 on the seat base 23. Further, the revolving unit 20 is provided with a two-column type canopy 35. The canopy 35 has left and right pillars 35a rising from the rear part of the support 30, and a roof 35b attached to the upper ends of the left and right pillars 35a. The upper part of the driver's seat 24 is covered with a roof 35b. In addition, although not shown in particular, for example, at a position between the left operation lever device 33 and the pillar 35a on the left side portion of the driver's seat 24 in the seat base 23, the distance between the left and right traveling devices 11 is changed. The lever is arranged.

4. Working machine Working machine 40 is a multi-joint type front working machine (swing post type in this embodiment) provided in the front part of revolving structure 20 for work such as excavation of earth and sand, and includes working arm 41 and attachment. A work implement 44 is included. The work arm 41 includes a boom 42, an arm 43, a boom cylinder 45, an arm cylinder 46, and a work tool cylinder 47. The boom 42 is rotatably connected to the front part of the revolving structure 20 (the swing post 37), the arm 43 is rotatably connected to the tip of the boom 42, and the work tool 44 is rotatably connected to the tip of the arm 43. There is. The boom 42, the arm 43, and the work implement 44 all rotate about a rotary shaft that extends horizontally to the left and right. Although FIG. 1 illustrates an example in which a bucket is attached to the work arm 41 as the work tool 44, the type of attachment to be attached is not limited to this. The boom cylinder 45 is connected to the revolving unit 20 (swing post 37) and the boom 42, and the arm cylinder 46 is connected to the boom 42 and the arm 43 at both ends. The work tool cylinder 47 has a base end connected to the arm 43, and a tip end connected to a tip end portion of the arm 43 and the work tool 44 via a link 48. The boom cylinder 45, the arm cylinder 46, and the work implement cylinder 47 are all hydraulic actuators, which are driven by the pressure oil discharged from the hydraulic pump, and drive the work machine 40 by the expansion and contraction operation.

5. Support structure of swivel joint In the work machine according to the present embodiment, since the revolving structure 20 revolves with respect to the traveling structure 10, the swivel joint 50 (FIG. 4 and the like) is arranged at the revolving center of the revolving structure 20. The swivel joint 50 connects between a hydraulic pump (strictly speaking, the control valve unit 36) provided on the revolving structure 20 and a hydraulic actuator provided on the traveling structure 10 such as the traveling motor 11d. Above the swivel joint 50, the floor panel 25, or the seat base 23 and the driver's seat 24 are located. The support structure of the swivel joint 50 will be described below.

As shown in FIGS. 4 and 5, the center frame 12 of the track frame includes a main body portion 12a and a round barrel portion 12b. The main body portion 12a is a box-shaped portion that extends in the vehicle width direction and connects the left and right side frames 11a. The round body portion 12b is a large-diameter cylindrical portion formed in the center of the upper surface of the main body portion 12a in the vehicle width direction. The cylindrical center line of the round barrel portion 12b extends vertically. Further, at least one opening through which the hydraulic pipe 60 (described later) is passed is provided in the round barrel portion 12b. As shown in FIG. 4, for example, a ring-shaped bracket 51 is concentrically arranged on the upper portion of the round barrel portion 12b, and the upper end surface of the round barrel portion 12b is fixed by bolts 52 at a plurality of positions in the circumferential direction. It is fastened and fixed to. The bracket 51 is a horizontal plate-shaped member.

On the upper part of the bracket 51, a bottomed cylindrical joint support 53 is arranged concentrically with the round barrel portion 12b. The joint support 53 includes a peripheral body portion 53a and a bottom plate portion 53b. The peripheral body portion 53a is a cylindrical member having a center line extending vertically, and has a flange portion projecting outside and inside the cylindrical portion at the lower end. The peripheral body portion 53a is fixed to the bracket 51 by fastening the outer peripheral portion of the flange portion to the upper portion of the bracket 51 with bolts 54 at a plurality of locations in the circumferential direction. The bottom plate portion 53b is provided so as to cross the inner peripheral opening of the flange portion at the lower end of the peripheral body portion 53a so as to pass through the center of the peripheral body portion 53a. Is fixed to the inner peripheral portion of the flange portion. The bottom plate portion 53b in the present embodiment has a stepped shape that is convex downward when viewed in the left-right direction so that the central portion is at a lower position with respect to the outer peripheral portion that is fastened to the peripheral body portion 53a. The shape of the bottom plate portion 53b viewed from the vertical direction may be a rectangular shape that passes through the center of the peripheral body portion 53a, or may be a circular shape that entirely covers the inner periphery of the peripheral body portion 53a. In the case of a circular shape, at least one opening for passing the joint side pipe 61 (described later) is provided in the bottom plate portion 53b.

The revolving frame 21 is supported on the upper part of the joint support 53, that is, on the upper part of the peripheral body part 53a via the revolving wheel 26. The slewing wheel 26 is a type of bearing arranged in a posture in which the center line extends vertically, and includes an inner ring 26a, an outer ring 26b, and a plurality of steel balls 26c. The inner ring 26a is arranged concentrically with the peripheral body portion 53a, and is fastened and fixed to the upper end surface of the peripheral body portion 53a by bolts 57 at a plurality of circumferential positions. The bolt 57 penetrates the inner ring 26a from top to bottom and is screwed into the upper end surface of the peripheral body portion 53a. The outer ring 26b is located on the outer peripheral side of the inner ring 26a, and a plurality of steel balls 26c are interposed between the outer ring 26b and the inner ring 26a. By rolling these steel balls 26c on the outer peripheral surface of the inner ring 26a and the inner peripheral surface of the outer ring 26b, the inner ring 26a and the outer ring 26b are relatively freely rotatable. The outer ring 26b is fastened and fixed to the lower surface of the revolving frame 21 by bolts 58 at a plurality of positions in the circumferential direction. The bolt 58 penetrates the outer ring 26b from bottom to top and is screwed into the swivel frame 21. In the present embodiment, the vertical dimension of the cylindrical portion of the peripheral body portion 53a of the joint support 53 is secured to be slightly larger than the length of the bolt 58 for fastening the bolts 58.

As described above, the joint support 53 is interposed between the revolving structure 20 and the traveling structure 10, is pivotally connected to the lower part of the revolving structure 20 via the revolving wheel 26, and is attached to the upper part of the track frame by the bolt 54. On the other hand, it is fixed detachably. Although not shown in the drawing, an internal gear is provided on the inner periphery of the inner ring 26a of the turning wheel 26, and a pinion of a turning motor (not shown) provided on the turning frame 21 is provided inside the inner wheel 26a. Contact and mesh. When the turning motor is driven, the pinion rolls on the internal gear and revolves around its own axis, whereby the outer ring 26b rotates with respect to the inner ring 26a. In this way, the revolving structure 20 revolves around the traveling structure 10.

The swivel joint 50 is supported on the bottom plate portion 53b of the joint support 53. The swivel joint 50 and the bottom plate portion 53b are fixed by, for example, bolts. The swivel-side hydraulic pipe 65 (FIG. 6 and the like) that connects the swivel joint 50 and the hydraulic pump is the same as that of a general hydraulic excavator. On the other hand, the traveling body side hydraulic pipe 60 that connects the hydraulic actuator (for example, the traveling motor 11 d) provided on the traveling body 10 and the swivel joint 50 includes a joint side pipe 61, an actuator side pipe 62, and a pipe joint 63. .. There are as many hydraulic pipes 60 as the number of hydraulic actuators to which hydraulic oil is supplied and the number of hydraulic ports of each hydraulic actuator, and each has a joint side pipe 61, an actuator side pipe 62 and a pipe joint 63. I have it. Although FIG. 4 and FIG. 5 show two sets of four hydraulic pipes 60 each connected to the left and right traveling motors 11d, a hydraulic cylinder for adjusting the distance between the left and right traveling devices 11 and a blade lifting/lowering operation mentioned earlier. When the cylinder 13a is provided, hydraulic pipes connected to these are also prepared.

The joint side pipe 61 of each hydraulic pipe 60 is a hydraulic pipe connected to the swivel joint 50. One end is connected to the hydraulic port of the swivel joint 50, and the other end is taken out to the outside of the joint support 53 and the round barrel portion 12b. There is. The actuator-side pipe 62 is a hydraulic pipe connected to a hydraulic actuator mounted on the traveling body 10 such as the traveling motor 11d. At this time, relay blocks 64 are installed on the upper surface of the main body portion 12a of the center frame 12 of the traveling body 10 and on both sides in the vehicle width direction of the round body portion 12b in the present embodiment. The actuator-side pipe 62 passes through the inside of the main body portion 12a of the center frame 12 and the side frame 11a, has one end connected to the hydraulic port of the corresponding hydraulic actuator, and the other end supported by the relay block 64.

The pipe joint 63 is a fluid joint that connects the joint-side pipe 61 and the actuator-side pipe 62 and may be a screw-in type such as a nipple socket, but in the present embodiment, a one-touch detachable quick fluid joint is adopted. .. For example, the pipe joint 63 includes a socket 63a attached to the other end of the actuator side pipe 62 and a plug 63b attached to the other end of the joint side pipe 61. The actuator side pipe 62 and the joint side pipe 61 can be disconnected and connected by simply inserting and removing the plug 63b from and into the socket 63a. As described above, the relay block 64 is arranged above the main body portion 12a of the center frame 12 and outside the round body portion 12b, so that the pipe joint 63 is located outside the track frame, and the joint side pipe 61 and the actuator side pipe 62 are Connected outside the track frame. The socket 63a and the plug 63b may be reversed (the plug 63b may be attached to the actuator side pipe 62, and the socket 63a may be attached to the joint side pipe 61).

6. Disassembly Work FIGS. 6 and 7 are cross-sectional views of a main part of the work machine according to the present embodiment, FIG. 6 shows a state in which a revolving structure is connected to a traveling structure, and FIG. 7 shows a revolving structure separated from the traveling structure. It represents the state. The procedure of the work for separating the revolving structure 20 from the traveling structure 10 will be described with reference to FIGS. 4 to 7. Note that the work of connecting the revolving structure 20 to the traveling structure 10 is the reverse of the procedure of the disassembling work described below.

When the revolving structure 20 is separated from the traveling structure 10, for example, the plug 63b is first pulled out from the socket 63a of the pipe joint 63 in the state shown in FIGS. 4 to 6, and the connection between the actuator side pipe 62 and the joint side pipe 61 is released. Next, the bolt 54 is pulled out to release the connection between the bracket 51 and the joint support 53. This alone releases the connection between the revolving structure 20 and the traveling structure 10, and the revolving structure 20 is separated from the traveling structure 10 as shown in FIG. 7 by lifting the revolving structure 20 with a crane or the like. During this period, the driver's seat 24, the seat base 23, the floor panel 25, and the like may be removed as appropriate if it is necessary to check the hydraulic piping 65 on the revolving structure side.

7. Effect (1) FIGS. 8 and 9 are cross-sectional views of a conventional working machine, FIG. 8 corresponding to FIG. 6 and FIG. 9 corresponding to FIG. In the conventional working machine, the swivel joint X is fixed to the upper portion of the main body portion A of the center frame of the track frame of the traveling body. Further, the revolving wheel C is directly connected to the upper part of the round body portion B of the center frame, and the revolving structure D is provided via the revolving wheel C. Since the swivel joint X is supported by the track frame, when the revolving structure D is separated from the traveling structure, the hydraulic pipe E on the revolving structure side is removed from the swivel joint X, and the connection between the revolving structure D and the revolving wheel C is released. As a result, the connection between the traveling structure and the revolving structure D was released (see FIG. 9). However, a large number of equipment such as a prime mover, a hydraulic pump, a driver's cab, and various tanks are densely laid out on the revolving structure D, and a hand is put in a narrow space inside the revolving structure D to make a large number of parts from the swivel joint X. The work for removing the hydraulic pipe E requires labor. Especially in a small hydraulic excavator, the driver's seat and the like are arranged above the swivel joint X, so the driver's seat and its surrounding parts must be removed as a preparatory work to access the swivel joint X. Also requires man-hours.

On the other hand, in the present embodiment, the joint support 53 is interposed between the revolving unit 20 and the traveling unit 10, and the swivel joint 50 is supported by the joint support 53. Accordingly, if the connection between the joint support 53 and the traveling body 10 is released, the connection between the traveling body 10 and the rotating body 20 can be released while the swivel joint 50 is supported by the revolving body 20. Therefore, when the revolving structure 20 is separated from the traveling structure 10, the hydraulic pipe is disconnected between the hydraulic actuator mounted on the traveling structure 10 and the swivel joint 50. Since the hydraulic piping can be disconnected on the side of the traveling body 10 that is easier to access than the rotating body 20 in which a large number of devices are densely arranged, the work of separating the rotating body 20 from the traveling body 10 can be performed easily. it can. For the purpose of separating the revolving structure 20 from the traveling structure 10, it is not necessary to remove the driver seat 24 or the like. Needless to say, the work of connecting the revolving structure 20 to the traveling structure 10 is facilitated similarly to the work of separating the revolving structure 20 from the traveling structure 10. In particular, the present embodiment is a small model in which the rear turning diameter is suppressed, and the device arrangement of the revolving structure 20 is particularly dense among work machines of various vehicle grades in order to suppress the turning radius of the revolving structure 20, and the invention is applied. The effect of doing so is extremely large.

(2) Further, when the pipe joint 63 is arranged outside the track frame and exposed as in the present embodiment, the pipe joint 63 is extremely easily accessed, and for example, a hand is placed in a space inside the track frame. No need to put it in and work. Therefore, the work of disconnecting and connecting the joint side pipe 61 and the actuator side pipe 62 is easy, and the work itself of separating and connecting the revolving structure 20 to the traveling structure 10 is also easy. In addition, when the pipe joint 63 is a quick fluid joint as in this embodiment, the work of disconnecting and connecting the joint side pipe 61 and the actuator side pipe 62 can be performed more easily and quickly.

However, as long as the essential effect (1) is obtained, it is not necessary to arrange the pipe joint 63 outside the track frame, and for example, inside the main body portion 12a of the center frame 12 or the like, the pipe joint 63 is arranged inside the track frame. 63 may be arranged. Further, as long as the effect (1) is obtained, the pipe joint 63 does not need to be a quick fluid joint, and may be a screw type fluid joint.

8. Modifications In the above embodiments, the vertical dimension of the peripheral body portion 53a of the joint support 53 is set to be slightly larger than the length of the bolt 58 in order to insert and remove the bolt 58 as described above. Therefore, if the joint support 53 is interposed between the traveling body 10 and the swing body 20, the overall height of the vehicle body increases by the amount of the joint support 53. However, in the case of the small model as in the present embodiment, even if the total height of the body is increased by the amount of the joint support 53, the size does not fall below the transportation limit size of the general road. However, for example, by suppressing the height of the round barrel portion 12b of the center frame 12, it is possible to suppress an increase in the overall height of the machine body due to the interposition of the joint support 53. In this case, the present invention can be suitably applied to a medium-sized or large-sized model having no margin for the transportation restriction size.

10... Running body, 11a... Side frame (track frame), 11d... Running motor (hydraulic actuator), 12... Center frame (track frame), 20... Revolving body, 26... Revolving wheel, 29... Engine (motor), 40 ...Work machine, 50...Swivel joint, 53...Joint support, 60...Hydraulic piping, 61...Joint side piping, 62...Actuator side piping, 63...Piping joint (quick fluid coupling)

Claims (3)

Driving a traveling body having a track frame, a revolving structure provided on the upper part of the traveling structure so as to be revolvable via a revolving wheel, a work machine attached to the revolving structure, a hydraulic pump provided on the revolving structure, and the hydraulic pump. In a working machine including a prime mover, a swivel joint connecting the hydraulic actuator provided on the traveling body and the hydraulic pump , and a hydraulic pipe connecting the hydraulic actuator provided on the traveling body and the swivel joint ,
Interposing between the revolving structure and the traveling structure, the upper part is connected to the lower part of the revolving wheel, the lower part is detachably fixed to the upper part of the track frame, and revolving relative to the revolving structure. With possible joint support,
The joint support is configured to include a cylindrical peripheral body portion, a bottom plate portion passing through the center of the peripheral body portion, and a flange provided at a lower end of the peripheral body portion, and supports the swivel joint with the bottom plate portion, and Bolted to the top of the track frame via a flange ,
The hydraulic pipe includes a joint side pipe connected to the swivel joint, an actuator side pipe connected to the hydraulic actuator, and a pipe joint connecting the joint side pipe and the actuator side pipe,
The pipe joint is removed to disconnect the joint-side pipe and the actuator-side pipe, and the bolt is removed to disconnect the track frame and the joint support, thereby connecting the revolving structure and the traveling structure. A working machine characterized by being constructed so that it can be unraveled . The working machine according to claim 1, work machine before Symbol pipe joint characterized in that it is located outside of the track frame. The work machine according to claim 2, wherein the pipe joint is a quick fluid joint.

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