JP4740088B2 - Construction machinery - Google Patents

Description

  The present invention relates to a construction machine such as a hydraulic excavator or a hydraulic crane in which an upper swing body is mounted on a lower traveling body through a swing device so as to be capable of swinging.

  In general, a hydraulic excavator as a construction machine includes a self-propelled lower traveling body, an upper revolving body provided on the lower traveling body, and a revolving device that supports the upper revolving body on the lower traveling body so as to be capable of revolving. And a work device provided on the front side of the upper swing body so as to be able to be lifted and lowered. The upper revolving structure includes a revolving frame forming a support structure, an engine mounted on the rear side of the revolving frame, a cab mounted on the left front side of the revolving frame and on which an operator gets on. Yes.

  On the other hand, the turning device includes an inner ring that is attached to the upper surface side of the frame of the lower traveling body, an outer ring that is attached to the bottom surface of the turning frame and surrounds the outer peripheral side of the inner ring, and a rolling element that rotatably connects the outer ring and the inner ring. And a plurality of steel balls, and a turning motor provided on the turning frame in mesh with an internal gear engraved on the inner ring. Thus, the inner ring, the outer ring, and a large number of steel balls form a rolling bearing.

  Here, since the inner ring, the outer ring, and each steel ball constitute a rolling bearing, it is necessary to periodically lubricate, for example, lubricating oil such as grease into a groove in which the steel ball rolls. For this reason, on the outer peripheral side of the outer ring, grease ports for supplying grease are provided at a plurality of locations in the circumferential direction, and filling ports such as grease nipples are attached to the respective grease ports. Thereby, the operator can supply grease to the groove | channel of an inner ring | wheel and an outer ring | wheel from a grease supply port by connecting a grease gun to a filling port. However, in this greasing work, since the filling ports are scattered around the outer ring, the worker must lubricate while moving around the excavator according to the position of each filling port. , Work is required.

  Therefore, in the hydraulic excavator according to the prior art, the end of the hose connected to the greasing port at another position is arranged as another filling port in the vicinity of the filling port arranged on the front side or the front side and the right side of the outer ring of the turning device. (For example, refer to Patent Document 1). Thereby, an operator can greasing from a plurality of greasing ports without frequently moving around the excavator by connecting a grease gun to the filling port and the filling port at the end of the hose. .

JP 2000-205283 A

  By the way, the hydraulic excavator described in Patent Document 1 described above is arranged so that the end of the hose connected to the other greasing port is disposed near the filling port, thereby supplying the entire swiveling device from the front side or the front side and the right side of the upper swing body. Can be greasy. However, since a work device is provided on the front side of the upper swing body, when performing a greasing operation, the work device is not lifted up to a position where it does not interfere with the work, and the position is not shifted left or right. There is a problem that workability is bad. Also, the filling port located on the right side of the upper swing body and provided in the outer ring is located behind the side surface of the upper swing body, so it is difficult to connect the tip of the grease gun to the small filling port (grease nipple). There's a problem.

The present invention has been made in view of the above-described problems of the prior art, and an object of the present invention is to facilitate the greasing operation for the swivel device by concentrating and arranging the filling ports at positions where the hand can reach from the surroundings. It is to provide a construction machine which is adapted.

A construction machine according to the present invention includes a self-propelled lower traveling body, an upper swing body provided on the lower traveling body and provided with a cab on which an operator gets on one of the front left and right directions, and the lower traveling body comprising a turning device for pivotally supporting the upper rotating body upward, and said swivel circumferential direction is provided at a plurality of locations lubrication port for supplying lubricating oil to the moving parts of the apparatus, the upper rotating body, the cab The swivel frame is formed as a support structure that supports the base plate. The swivel frame is disposed near the center of the swivel frame, and the bottom plate is attached to the swivel device. A left vertical plate, a right vertical plate, a left side frame connected to the left vertical plate via a plurality of overhanging beams and extending left and right in the front and rear directions, and another plurality of overhangs on the right vertical plate Connected via a beam and extend right end forward and backward And a right side frame, the lower surface side of the revolving frame is mounted a plurality of the under cover so as to prevent the earth and sand from entering.

In order to solve the above-mentioned problem, the feature of the configuration adopted by the invention of claim 1 is that, among the plurality of undercovers, an undercover located on the lower side of the cab is provided on the left side frame. Grease openings are formed at outer positions in the left and right directions in the vicinity, and the inner side surface of the left side frame corresponds to the greasing openings below the cab and above the undercover. A mounting block and a plurality of filling ports for filling the lubricating oil provided in the mounting block are disposed at positions, and the filling ports and the greasing ports are respectively connected by a plurality of pipes. It is in the configuration.

According to a second aspect of the invention, the said undercover positioned on the lower side of the front Symbol cab, left the vicinity of the turning device, located inside the right direction to form a pipe through opening, said plurality of pipes has a structure in which one side is attached to the mounting block being disposed on the under cover, Ru is connected the other side extends to the outer ring around said turning device through the pipe through opening in the greasing port.

According to the first aspect of the present invention, the under cover located on the lower side of the cab is formed with grease openings at the left and right outer positions in the vicinity of the left side frame, the side surface, a lower cab and with the upper side of the under cover is provided a mounting block to the corresponding position and the lubrication aperture, since there is provided a plurality of filling openings in the mounting block, left, right Each filling port can be arranged at a position closer to the operator than the swivel device outside the direction. Thus, in the greasing operation for the swivel device, for example, a filler such as a grease gun is connected to the filling port, and in this state, the lubricating oil is filled from the filling tool, and the lubricating oil is filled via the corresponding piping. Lubricating oil can be supplied to the movable part of the swivel device. Moreover, lubricating oil can be supplied also from another greasing port by changing the filling port which connects a filling tool.

As a result, an operator who works from the periphery of the upper swing body through the greasing opening of the under cover can easily connect the filling tool to the filling port provided in the mounting block . And by changing the filling port which connects a filling tool, lubricating oil can be supplied to a turning apparatus from another greasing port, without moving around the upper turning body. Thereby, the greasing operation | work with respect to the movable part of a turning apparatus can be performed easily, and workability | operativity can be improved. Further, when the filling port is arranged on the lower side of the cab, the lubricating oil can be supplied immediately after getting out of the cab.

Moreover, the mounting block having a plurality of filling ports provided on the inner side surface of the left side frame among the turning frame of the upper turning body is provided at a position below the cab and corresponding to the greasing opening of the under cover. Therefore, a filler such as a grease gun can be easily connected to the filling port from the outside, and the greasing operation can be easily performed .

According to the second aspect of the present invention, the under cover located on the lower side of the cab is formed with piping passages located on the inner side in the left and right directions in the vicinity of the turning device. The one side can be arranged on the under cover and attached to the mounting block, and the other side can be extended around the outer ring of the swivel device through the piping passage and connected to each greasing port.

  Hereinafter, as a construction machine according to an embodiment of the present invention, a wheel-type hydraulic excavator will be described as an example and described in detail with reference to the accompanying drawings.

First, FIGS. 1 to 9 show a form of implementation of the present invention. In FIG. 1, reference numeral 1 denotes a hydraulic excavator as a construction machine. The hydraulic excavator 1 includes a self-propelled wheel-type lower traveling body 2 and an upper swing body 5 described later mounted on the lower traveling body 2. The upper turning body 5 is supported on the lower traveling body 2 so as to be turnable, and the working device 23 is provided on the front side of the upper turning body 5 so as to be able to move up and down.

  Here, the lower traveling body 2 will be described. The lower traveling body 2 includes a chassis frame 3 formed in a box shape extending in the front and rear directions, and the front, rear position, left and right positions of the chassis frame 3. It is roughly constituted by wheels 4 (only the left side is shown) as the provided wheels. Further, as shown in FIG. 1, a circular cylinder 3A is provided at the center of the upper surface of the chassis frame 3, and an inner ring 11 of a turning device 10 to be described later is attached to the upper part of the circular cylinder 3A. Further, on both the left and right sides of the chassis frame 3, there are provided step 3B for getting on and off (only the left side is shown) located between the front and rear wheels 4.

  Next, 5 shows an upper swing body of the excavator 1. The upper revolving unit 5 is mounted on the chassis frame 3 of the lower traveling unit 2 so as to be capable of revolving, and is generally configured by a revolving frame 6, a cab 7, a counterweight 8, a building cover 9, and the like which will be described later.

  Reference numeral 6 denotes a revolving frame of the upper revolving structure 5, and the revolving frame 6 is formed as a support structure. Further, as shown in FIGS. 2 and 3, etc., the revolving frame 6 has a bottom plate 6A made of a substantially square thick steel plate disposed near the center of the front side, and stands up to the bottom plate 6A in the front and rear directions. The left vertical plate 6B, the right vertical plate 6C, the left side frame 6D extending in the front and rear directions at the left end, the right side frame 6E extending in the front and rear directions at the right end, and each of the vertical plates 6B and 6C and the side frames 6D and 6E are roughly constituted by a plurality of overhanging beams 6F and a cab mounting base 6G provided on the left front side.

  A plurality of under covers 6 </ b> H are attached to the lower surface side of the revolving frame 6 in order to prevent intrusion of earth and sand into the building cover 9. Among these under covers 6H, one under cover 6H located on the lower side of the cab 7 (the left side of the turning device 10) described later is in the vicinity of the turning device 10 as shown in FIGS. A piping passage 6H1 is formed on the inner side in the left and right directions, and a greasing opening 6H2 is formed on the outer side in the left and right directions near the left side frame 6D.

  Here, as shown in FIG. 4, an outer ring 12 of a turning device 10 to be described later is bolted to the bottom plate 6 </ b> A, and a turning motor 14 to be described later is attached in the vicinity of the inner peripheral side of the outer ring 12. It has been. A working device 23 is attached to the front portions of the left and right vertical plates 6B and 6C so as to be able to move up and down.

  Reference numeral 7 denotes a cab provided on the left front side of the revolving frame 6. As shown in FIG. 7, the cab 7 is formed as a vertically long box-like body by closing the bottom of the cab box 7A with a floor plate 7B. In the cab 7, a driver's seat 7C on which an operator is seated is provided on the floor board 7B. Left and right operations for operating the turning device 10 and the work device 23 are provided on both the left and right sides of the driver seat 7C. An operation lever 7D is provided. On the other hand, on the floor plate 7B on the front side of the driver's seat 7C, a steering device 7E for operating the lower traveling body 2 is erected.

  Reference numeral 8 denotes a counterweight (see FIG. 1) attached to the rear end portion of the revolving frame 6, and the counterweight 8 balances the weight with the work device 23. A building cover 9 is provided between the cab 7 and the counterweight 8 and is provided on the revolving frame 6. The building cover 9 includes an engine, a tank and the like mounted on the revolving frame 6. (Not shown).

Next, reference numeral 10 denotes a turning device that supports the upper turning body 5 on the lower traveling body 2 so as to be turnable. The turning device 10, FIG. 4, as is shown in Fig. 5 and the like, described later of the inner ring 11, outer ring 12, a steel ball 13 is largely constituted by a revolving motor 14 and the like.

  Reference numeral 11 denotes an inner ring provided on the lower traveling body 2 side, and the inner ring 11 is fixed to the round body 3A of the chassis frame 3 using a plurality of bolts (not shown) or the like as shown in FIG. . An internal gear 11A is formed on the inner peripheral side of the inner ring 11 over the entire circumference, and the internal gear 11A meshes with a pinion 14A of a turning motor 14 described later. Further, as shown in FIG. 5, a semicircular guide groove 11 </ b> B is provided over the entire circumference on the outer peripheral surface of the inner ring 11, and this guide groove 11 </ b> B constitutes a part of the movable part of the turning device 10. Yes.

  An outer ring 12 is provided so as to surround the outer peripheral side of the inner ring 11. The outer ring 12 is fixed to the lower surface of the bottom plate 6 </ b> A of the turning frame 6 using a plurality of bolts (not shown). Further, a semicircular guide groove 12A is provided over the entire circumference on the inner peripheral surface of the outer ring 12 facing the inner ring 11, and this guide groove 12A constitutes a part of the movable part of the turning device 10. Yes. Further, the outer ring 12 is provided with greasing ports 15 and 16 to be described later at a front position and a rear position.

  Reference numeral 13 denotes a large number of steel balls as rolling elements provided between the inner ring 11 and the outer ring 12. These many steel balls 13 are arranged between the guide groove 11B of the inner ring 11 and the guide groove 12A of the outer ring 12 so as to be able to roll. Thereby, each steel ball 13 comprises the movable part which supports the inner ring | wheel 11 and the outer ring | wheel 12 so that relative rotation is mutually possible.

  Reference numeral 14 denotes a swing motor mounted on the bottom plate 6A of the swing frame 6, and the swing motor 14 is configured as a hydraulic motor incorporating a speed reducer (not shown). In the turning motor 14, the output-side pinion 14 </ b> A meshes with the internal gear 11 </ b> A of the inner ring 11. Thereby, the turning motor 14 turns the upper turning body 5 with respect to the inner ring 11 by rotationally driving the pinion 14A.

  A front greasing port 15 is provided on the outer ring 12 of the turning device 10. The front-side greasing port 15 extends in the radial direction at a position on the front side when the outer ring 12 is attached to the turning frame 6. The front greasing port 15 has an outer side in the radial direction that opens to the outside, and an inner side that opens to the groove bottom of the guide groove 12A.

  Here, the front greasing port 15 is provided in a deepened position on the lower side of the work device 23 described later. For this reason, the greasing work from the front greasing port 15 becomes very difficult due to the work device 23 and the like being in the way. However, since the front greasing port 15 is connected to the later-described front filling port 18 disposed at the left side position of the swivel frame 6 via the front piping 21, lubricating oil such as grease is applied to the front greasing port 15. Can be easily supplied.

  Reference numeral 16 denotes a rear greasing port provided on the rear side of the outer ring 12 which is opposite to the front greasing port 15 in the radial direction. As with the front greasing port 15 described above, the rear greasing port 16 has a radially outer side opened to the outside and an inner side opened to the groove bottom of the guide groove 12A.

  Here, since the rear greasing port 16 is provided at a deeper position on the lower side of the revolving frame 6, the greasing operation from the rear greasing port 16 is difficult due to the counterweight 8 and the like being in the way. become. However, since the rear greasing port 16 is connected to the rear filling port 19 described later disposed at the left position of the revolving frame 6 through the rear pipe 22 in substantially the same manner as the front greasing port 15. Grease can also be easily supplied to the rear greasing port 16.

  Reference numeral 17 denotes a mounting block provided on the lower side of the cab 7. The mounting block 17 is attached to the inner side surface of the left side frame 6D via a bracket 17A so as to correspond to the greasing opening 6H2 of the under cover 6H of the revolving frame 6 as shown in FIGS. ing. Further, on the lower surface of the mounting block 17, filling ports 18 and 19 to be described later are attached at positions exposed from the greasing opening 6H2 of the under cover 6H, and each piping 21 to be described later is provided on the left and right inner surfaces. , 22 are connected to one end. Further, the mounting block 17 is provided with an oil passage (not shown) that connects the filling ports 18 and 19 and the pipes 21 and 22. As a result, the mounting block 17 has the filling ports 18 and 19 arranged at the left and right outer positions where the grease gun 20 can be easily connected from the cab 7 side.

  Reference numeral 18 denotes a front filling port attached to the lower surface of the attachment block 17. Reference numeral 19 denotes a rear filling port which is arranged on the rear side of the front filling port 18 and attached to the lower surface of the mounting block 17. Thereby, each filling port 18 and 19 concentrates on the lower surface of the mounting block 17 provided on the lower side of the cab 7, that is, the left and right outer positions that can be easily lubricated from the left side of the upper swing body 5. Arranged.

  Each filling port 18, 19 is constituted by, for example, a grease nipple. Further, as shown in FIG. 8, the front ends of the filling ports 18 and 19 are directed outward in the left and right directions and inclined downward. Accordingly, a grease gun 20 for filling lubricating oil such as grease can be easily connected to the filling ports 18 and 19 through the grease supply opening 6H2 of the lower under cover 6H.

  Furthermore, the filling ports 18 and 19 can be concealed in a position that is hardly visible from the outside by being arranged on the upper side of the under cover 6 </ b> H of the revolving frame 6 together with the mounting block 17. Further, since the under cover 6H has only a small greasing opening 6H2, each filling port 18, 19 can be protected from damage due to flying stones, adhesion of earth and sand, and the like.

  Reference numeral 21 denotes a front side pipe provided between the mounting block 17 and the outer ring 12 of the turning device 10. One side of the front pipe 21 is disposed on the under cover 6H, and one end of the front pipe 21 is attached to the side surface of the mounting block 17 and is connected to the front filling port 18 through an oil passage. On the other hand, as shown in FIGS. 3 and 6, the other side of the front pipe 21 is exposed to the periphery of the outer ring 12 through the pipe passage 6H1, extends to the front side along the periphery of the outer ring 12, and the other end portion. Is connected to the front greasing port 15.

  Thereby, since the front side piping 21 can connect the front side filling port 18 and the front side greasing port 15, the grease filled in the front side filling port 18 from the grease gun 20 is separated from the position where it is difficult for an operator to approach. To the front greasing port 15.

  Reference numeral 22 denotes a rear pipe provided between the mounting block 17 and the outer ring 12 of the turning device 10. The rear side pipe 22 is arranged on the under cover 6H on one side in substantially the same manner as the front side pipe 21 described above, one end of which is attached to the side surface of the mounting block 17, and the rear side filling port 19 is provided via an oil passage. It is connected to the. On the other hand, the other side of the rear pipe 22 is exposed to the periphery of the outer ring 12 through the pipe through-hole 6H1, extends to the rear side along the periphery of the outer ring 12, and the other end is connected to the rear greasing port 16. It is connected.

  Thereby, since the rear side piping 22 can connect the rear side filling port 19 and the rear side greasing port 16, the grease with which the rear side filling port 19 is filled from the grease gun 20 is located at a deep position. It can be supplied to the rear greasing port 16.

  Here, the front side pipe 21 and the rear side pipe 22 can be made of a flexible pipe such as a hose that can be freely bent by being formed using a resin material or the like, or a fixed pipe made of a metal pipe.

  Reference numeral 23 denotes a working device provided on the front side of the upper swing body 5 so as to be able to move up and down. The working device 23 is attached to the front part of each of the vertical plates 6B and 6C constituting the revolving frame 6. And the working device 23 can perform excavation work of earth and sand.

The excavator 1 according to the embodiment of the present invention has the above-described configuration. Next, the operation of the excavator 1 will be described.

  First, the operator gets on the cab 7 and sits on the driver's seat 7C. In this state, the lower traveling body 2 can be driven toward the work site by operating the front steering device 7E and the like. Further, by operating the left and right work operation levers 7D and the like, the swivel device 10, the work device 23, and the like can be operated to perform soil excavation work and the like. When the operating time reaches a predetermined time, lubricating oil such as grease is supplied to the swivel device 10.

  Therefore, a greasing operation for the turning device 10 will be described. The worker descends to the left side of the upper swing body 5 with the grease gun 20 accommodated in the cab 7 or the like, for example. At this position, as shown in FIG. 8, the grease gun 20 is connected to the front filling port 18 through the greasing opening 6H2 of the under cover 6H of the swivel frame 6. At this time, since the front filling port 18 is disposed outside in the left and right directions, the operator can easily connect the grease gun 20.

  When the grease gun 20 is connected to the front filling port 18, the filling port 18 is filled with grease. At this time, the grease is supplied from the front filling port 18 through the oil passage of the mounting block 17 and the front pipe 21 to the front movable portion between the inner ring 11 and the outer ring 12 through the front greasing port 15 provided in the outer ring 12. can do.

  Next, the operator removes the grease gun 20 from the front filling port 18 and connects it to the rear filling port 19 arranged next to it. In this state, by filling the rear filling port 19 with grease, this grease is supplied from the rear filling port 19 through the oil passage of the mounting block 17 and the rear piping 22 to the rear supply port provided in the outer ring 12. It can be supplied to the movable part on the rear side between the inner ring 11 and the outer ring 12 through the oil port 16.

Thus, according to the implementation, disposing concentrated to a front loading opening 18 and a rear loading opening 19 to the left end of the revolving frame 6 as a lower cab 7. And the front side filling port 18 is connected to the front side greasing port 15 provided in the outer ring | wheel 12 of the turning apparatus 10 using the front side piping 21. FIG. Further, the rear filling port 19 is connected to the rear greasing port 16 using the rear piping 22.

  Accordingly, the filling ports 18 and 19 arranged at the left end of the swivel frame 6 do not sink into the lower side of the swivel frame 6 or forcibly extend arms between the swivel frame 6 and the lower traveling body 2. The grease gun 20 can be connected easily and accurately. On the other hand, when the revolving device 10 is lubricated, grease is supplied to the revolving device 10 from the front greasing port 15 of the outer ring 12 via the front piping 21 or the like by filling the front filling port 18 with grease. it can. Further, by filling the rear filling port 19 with grease, the grease can be supplied to the turning device 10 also from the rear greasing port 16 of the outer ring 12 via the rear pipe 22 or the like.

  As a result, the operator can easily install the grease gun 20 at the filling ports 18 and 19 arranged at the left end of the swivel frame 6 without being obstructed by the wheel 4, the counterweight 8, the work device 23 and the like of the lower traveling body 2. It is possible to improve the workability in the greasing work. In addition, dripping of grease due to poor connection can be prevented.

  In addition, grease is supplied to the movable part of the swivel device 10 from the front greasing port 15 and the rear greasing port 16 of the outer ring 12 only by sequentially connecting the grease gun 20 to the front filling port 18 and the rear filling port 19. The greasing operation to two places can be performed from one place on the left side of the cab 7. Thereby, the movement at the time of lubrication can be abbreviate | omitted and workability | operativity and safety | security can be improved.

  Further, since the filling ports 18 and 19 are provided on the lower side of the cab 7 (the left end of the swivel frame 6), the grease gun 20 can be connected to the filling ports 18 and 19 at a position descending from the cab 7. It is possible to achieve further efficiency.

  On the other hand, the mounting block 17, the filling ports 18 and 19, and one side portions of the pipes 21 and 22 can be covered with the under cover 6 </ b> H of the turning frame 6. Thereby, it is possible to protect the mounting block 17, the filling ports 18 and 19, and the pipes 21 and 22 from flying stones, earth and sand, etc. during traveling, and the reliability and durability can be improved. Furthermore, the appearance can be improved.

Next, FIG. 10 shows a reference example of the present invention. The feature of this reference example is that a plurality of filling ports are concentrated in the cab. In reference examples, the same reference numerals to the same components as the form of implementation described above, and description thereof is omitted.

In FIG. 10, reference numeral 31 denotes a mounting block according to a reference example provided inside the cab 7. The mounting block 31 is disposed at a position where it does not interfere with work, for example, on the side of the steering device 7E on the left front side of the floor plate 7B. ing. The mounting block 31 may be disposed so as to be covered under a floor mat (not shown). In this case, the greasing operation can be performed by lifting the floor mat.

32 front filling port mounted on the upper surface of the mounting block 31, 33 denotes, respectively Re its side fill port after being mounted on the upper surface of the mounting block 31 arranged on the rear side of the front loading opening 32. These filling ports 32 and 33 are located in the vicinity of the front side of the driver's seat 7C and are opened to the floor plate 7B of the cab 7 so as to be concentrated at positions where grease can be easily supplied from the cab 7. Yes. The filling ports 32 and 33 are connected to the greasing ports 15 and 16 of the outer ring 12 using pipes 21 and 22 in substantially the same manner as the filling ports 18 and 19 according to the above embodiment.

Thus, even in a reference example thus configured, it is possible to obtain substantially the same operational effect as in the implementation described above. In particular, according to the reference example , since the filling ports 32 and 33 are arranged in the cab 7, the operator can apply the grease by using the time when the operator enters and exits the cab 7. In addition, the greasing operation can be performed while riding on the cab 7 or in an easy posture while sitting on the driver's seat 7C. Furthermore, the greasing operation can be performed without getting wet even during rain.

In the form of implementation, front fill port 18, the rear loading opening 19, the front pipe 21, the rear pipe 22 used, two places of the rear lubrication port 16 and the front lubrication port 15 provided in the outer ring 12 The configuration in which grease is supplied from is described as an example. However, the present invention is not limited to this, and for example, a configuration may be adopted in which greasing ports are provided at three or four or more locations in the circumferential direction of the outer ring 12. In this case, what is necessary is just to set it as the structure which provides the filling port and piping corresponding to each greasing port .

Further, in the embodiment of implementation, the hydraulic excavator 1 of the wheel type having a pivoting device 10 as a construction machine it has been described as an example. However, the present invention is not limited to this, and can be widely applied to other construction machines such as a crawler hydraulic excavator or a hydraulic crane equipped with a turning device.

  In this case, as in the modification shown in FIG. 11, for example, the excavator 41 has a crawler type lower traveling body 42, an upper swing body 43 mounted on the lower traveling body 42, and the lower traveling body 42. The revolving device 44 that supports the upper revolving unit 43 so as to be revolved, and the working device 45 that is attached to the front side of the upper revolving unit 43 so as to be able to move up and down.

  The lower traveling body 42 includes a track frame 42A, side frames 42B (only the left side is shown) provided on both the left and right sides of the track frame 42A, and driving wheels 42C attached to end portions of the side frames 42B. The idle wheel 42D, the drive wheel 42C, and a crawler belt 42E wound around the idle wheel 42D.

It is a front view showing a hydraulic excavator of the wheel type to be applied to the implementation of the embodiment of the present invention. It is a top view which shows the outer ring | wheel, turning frame, piping, etc. in FIG. It is a bottom view which shows the outer ring | wheel, turning frame, filling port, piping, etc. in FIG. FIG. 4 is an enlarged cross-sectional view of a main part of a turning frame and a turning device as seen from an arrow IV-IV direction in FIG. 2. Figure 4 in the outer ring, a sectional view of a main portion enlarged showing the enlarged inner contact and steel balls. It is a perspective view of the principal part expansion which looked at the arrangement relationship of each filling port, piping, and undercover from the lower side of the turning frame. It is sectional drawing of the cab seen from the arrow VII-VII direction in FIG. It is sectional drawing of the principal part expansion which looked at the attachment state of the attachment block with respect to a turning frame, a filling port, and piping from the arrow VIII-VIII direction in FIG. It is sectional drawing of the principal part expansion which looked at the left side frame, the attachment block, the filling port, and piping from the arrow IX-IX direction in FIG. It is sectional drawing of the cab which looked at the attachment block by the reference example of this invention, and the filling port from the same position as FIG. It is a front view which shows the crawler type hydraulic excavator by the modification of this invention.

Explanation of symbols

1,41 Hydraulic excavator (Construction machine)
DESCRIPTION OF SYMBOLS 2,42 Lower traveling body 3 Chassis frame 4 Wheel 5,43 Upper turning body 6 Turning frame 7 Cab 7A Cab box 7B Floor board 7C Driver's seat 7D Work operation lever 7E Steering device 10,44 Turning device 11 Inner ring 12 Outer wheel 13 Steel ball 14 Swivel motor 15 Front greasing port 16 Rear greasing port 17, 31 Mounting block 18, 32 Front filling port 19, 33 Rear filling port 20 Grease gun (filler)
21 Front piping (Piping)
22 Rear piping (piping)

Claims (2)

A self-propelled lower traveling body, an upper revolving body provided on the lower traveling body and having a cab on which an operator rides on one of the front left and right sides, and the upper revolving body is swung on the lower traveling body A revolving device that supports the revolving device, and a greasing port that is provided at a plurality of locations in the circumferential direction of the revolving device and supplies lubricating oil to the movable part ,
The upper swivel body has a swivel frame formed as a support structure that supports the cab. The swivel frame is disposed near the center of the swivel frame, the bottom plate to which the swivel device is attached, and the front and rear of the bottom plate. A left vertical plate, a right vertical plate extending in a direction, a left side frame connected to the left vertical plate via a plurality of overhanging beams and extending in the front and rear directions, and the right vertical plate A right side frame connected to the plate via a plurality of other overhanging beams and extending in the front and rear directions at the right end, and a plurality of sheets on the lower surface side of the revolving frame to prevent intrusion of earth and sand In a construction machine with an undercover attached ,
The under cover located on the lower side of the cab among the plurality of under covers is provided with a greasing opening at the left and right outer positions in the vicinity of the left side frame,
The inner side surface of the left side frame is filled with a mounting block and the lubricating oil provided in the mounting block at a position corresponding to the grease opening on the lower side of the cab and on the upper side of the under cover. A plurality of filling ports, and
A construction machine characterized in that each filling port and each greasing port are connected by a plurality of pipes. The said undercover positioned on the lower side of the front Symbol cab, left the vicinity of the turning device, located inside the right direction to form a pipe through opening, said plurality of pipes, the under cover is one side on which is disposed attached to said mounting block, the construction machine according to claim 1, the other side is as connected Ru configuration wherein extends around the outer ring to the lubrication port of the turning device through the pipe through opening.

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