JP2006298355A - Working machine - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To suppress vibration of various items of equipment mounted on a main frame and to enhance the durability of a mounting part of the main frame and the various items of equipment. <P>SOLUTION: Upper sides of the various items of equipment such as a counter weight 19, an engine 21, a heat exchanger 24, an operation oil tank 26 and a fuel tank 27 mounted on a rotation frame 11 are mounted to an upper frame 31, thereby, these various items of equipment are clamped and supported between the rotation frame 11 and the upper frame 31. Thereby, since the upper sides of the respective items of equipment can be restricted by the upper frame 31, the upper side of the various items of equipment can be suppressed from being largely oscillated by oscillation generated during the operation of a hydraulic shovel 1. As a result, load imposed on the mounting part of the respective items of equipment such as the counter weight 19, the engine 21, the heat exchanger 24, the operation oil tank 26 and the fuel tank 27 and the rotation frame 11 can be reduced to enhance the durability. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a work machine in which devices including a counterweight, an engine, and the like are mounted on a main frame that forms a support structure such as a hydraulic excavator or a hydraulic crane.

  In general, a work machine such as a hydraulic excavator or a hydraulic crane includes a self-propelled crawler-type lower traveling body, an upper revolving body that is turnably mounted on the lower traveling body, and a front side of the upper revolving body. And a work device arranged in the above.

  Here, the upper swing body of a hydraulic excavator used for excavation work of earth and sand has a swing frame as a main frame that forms a support structure, and the working device can be raised and lowered on the front side of the swing frame. Is provided.

  The swivel frame is mounted on a counterweight that balances the weight of the work equipment, an engine that is a power source, a heat exchange device such as a radiator and an oil cooler, a fuel tank that stores fuel supplied to the engine, and a hydraulic excavator A mounting device such as a hydraulic oil tank for storing hydraulic oil supplied to and discharged from each hydraulic actuator is provided (see, for example, Patent Document 1).

Japanese Utility Model Publication No. 5-40356

  However, in the conventional hydraulic excavator, each mounted device mounted on the revolving frame is normally attached to the revolving frame using bolts or the like on the lower side, and the upper side is a free end.

  On the other hand, when the excavator travels on rough terrain or the like, the counterweight has vibrations in the front and rear directions (pitching vibration) around the axis extending in the left and right directions (vehicle width direction), or Vibrations in the left and right directions (rolling vibrations) about the axis extending in the front and rear direction (vehicle length direction) are generated. Also, when the work device is moved up and down during excavation work using a hydraulic excavator, the jack up operation is canceled after the work device is pushed against the ground and the front side of the lower traveling body is lifted. Even when the front side of the lower traveling body is lowered to the ground, the counterweight generates pitching vibration, rolling vibration, and the like.

  When the counterweight generates vibration during operation of the hydraulic excavator, the vibration is transmitted from the swing frame to an engine, a heat exchange device, a fuel tank, a hydraulic oil tank, and the like mounted on the swing frame. In this case, each mounted device on the swivel frame is attached to the swivel frame on the lower side, and the upper side is a free end. Oscillates greatly in the left and right directions.

  In this way, when the upper side of each mounted device provided on the swivel frame vibrates greatly, a large load acts on the mounting portion between the lower side of each mounted device and the swivel frame, and the durability of the mounting portion decreases. In addition to this, there is a problem that the durability of each on-board device itself is lowered.

  The present invention has been made in view of the above-described problems of the prior art. The vibration of each mounted device mounted on the main frame is suppressed, the durability of the mounting portion between the main frame and each mounted device, and the durability of each mounted device itself. An object of the present invention is to provide a work machine capable of enhancing the performance.

  In order to solve the above-described problems, the present invention includes a main frame that includes a support structure and a working device, and includes a counterweight, an engine, a heat exchange device, a fuel tank, and a hydraulic oil tank mounted on the main frame. Applies to work machines consisting of equipment.

  A feature of the configuration adopted by the invention of claim 1 resides in that an upper frame that supports the upper side of at least two mounted devices among the mounted devices is provided.

  The invention of claim 2 is that a vibration isolator is provided between the engine and the upper frame in each of the mounted devices.

  The invention according to claim 3 is that the upper frame is constituted by a plurality of upper frame division bodies that can be divided.

  A fourth aspect of the present invention resides in that a vertical connection member is provided for connecting the upper frame and the main frame in the upward and downward directions.

  According to the invention of claim 1, by providing the upper frame that supports the upper side of at least two of the mounted devices mounted on the main frame, the upper side of each of the mounted devices is restrained by the upper frame. can do. Therefore, even if the vibration generated during operation of the work machine is transmitted from the main frame to each mounted device, it is possible to suppress a large vibration of the mounted device supported by the upper frame among the mounted devices. As a result, the load acting on the mounting portion between each mounted device supported by the upper frame and the main frame can be reduced to increase the durability of the mounting portion, and each mounted device itself supported by the upper frame. Can increase the durability.

  According to the second aspect of the present invention, even if the engine generates vibration at a relatively high frequency during operation by providing a vibration isolating device between the engine and the upper frame among the mounted devices, Vibration can be suppressed by a vibration isolator. Therefore, noise due to engine vibration can be reduced, and the riding comfort of the work machine can be improved.

  According to the invention of claim 3, since the upper frame can be formed by joining a plurality of upper frame divided bodies to each other, for example, each mounted device sandwiched between the main frame and the upper frame When performing an inspection operation or the like, by dividing the upper frame into a plurality of upper frame divided bodies, the upper frame divided bodies can be easily removed from the mounted equipment to be inspected. Thereby, even when each mounted device is sandwiched and supported between the main frame and the upper frame, the inspection work for each mounted device can be easily performed.

  According to the invention of claim 4, since the upper frame and the main frame are connected in the upper and lower directions by the vertical connecting material, the upper side of each of these mounted devices can be restrained by the upper frame, It is possible to suppress displacement (vibration) of the upper frame with respect to the main frame. As a result, it is possible to further reduce the load acting on the mounting portion between the plurality of mounted devices attached to the upper frame and the main frame, so that the durability of the mounting portion between each mounted device and the main frame, each mounted device The durability of itself can be further enhanced.

  Hereinafter, an embodiment of a work machine according to the present invention will be described in detail with reference to FIGS. 1 to 18 by taking a hydraulic excavator as an example.

  First, FIG. 1 thru | or FIG. 6 shows the 1st Embodiment of this invention, In the figure, 1 has shown the hydraulic shovel used for excavation work, such as earth and sand. Here, the hydraulic excavator 1 includes a self-propelled crawler-type lower traveling body 2, an upper revolving body 3 that is turnably mounted on the lower traveling body 2, and work provided on the upper revolving body 3. The apparatus 4 is roughly configured.

  The upper swing body 3 includes a swing frame 11 (described later) in which the working device 4 is provided on the front side so that the working device 4 can move up and down, and a cab 5 that is provided on the left side of the front of the swing frame 11 and defines a cab. The counter weight 19 (described later) provided on the rear side of the turning frame 11 and a building cover 6 provided on the front side of the counter weight 19 are roughly configured. The building cover 6 includes an engine 21 (described later), A heat exchange device 24, a hydraulic oil tank 26, a fuel tank 27, an upper frame 31, and the like are accommodated.

  Reference numeral 11 denotes a revolving frame as a main frame that serves as a base of the upper revolving structure 3. The revolving frame 11 includes a center frame 12, left and right side frames 13 and 14, and the like, which will be described later, as shown in FIGS. Thus, it is configured as a stronger support structure. The working device 4 is attached to the front side of the swivel frame 11 so as to be able to move up and down. On the swivel frame 11, a counterweight 19, an engine 21, a heat exchange device 24, a hydraulic oil tank 26, and a fuel tank, which will be described later. 27 includes various devices (equipped devices).

  Reference numeral 12 denotes a center frame that constitutes the central portion of the revolving frame 11, and the center frame 12 is formed of a thick steel plate or the like, and extends forward and rearwardly from a bottom plate 12A, and is erected on the bottom plate 12A. The left vertical plate 12 </ b> B and the right vertical plate 12 </ b> C that extend in the rear direction and are formed so that the height dimension gradually decreases from the front side toward the rear side.

  Reference numeral 13 denotes a left side frame which is positioned on the left side of the center frame 12 and extends in the front and rear directions. Reference numeral 14 is a right side frame which is positioned on the right side of the center frame 12 and extends in the front and rear directions. As shown in FIG. 3, the side frames 13 and 14 are formed of cylindrical bodies having a substantially D-shaped cross-sectional shape. The center frame 12 and the left side frame 13 are connected by a plurality of left extending beams 15 (only one is shown) extending in the left and right directions, and the center frame 12 and the right side frame 14 are They are connected by a plurality of right extending beams 16 (only one is shown) extending in the left and right directions.

  .. Are a plurality of lower brackets provided on the rear side of the center frame 12, and the lower brackets 17 are, as shown in FIGS. 3 and 4, left and right vertical plates 12B, 12C. Two pieces are arranged apart from each other in the front and rear directions, and are fixed by using means such as welding. An engine mount 18 having an elastic body such as rubber is attached to each lower bracket 17 using a bolt or the like (not shown).

  Reference numeral 19 denotes a counterweight provided at the rear end of the revolving frame 11. The counterweight 19 is attached to the rear end of the left and right vertical plates 12B and 12C constituting the center frame 12 by using bolts 20. The weight balance with the working device 4 is taken. An upper frame mounting surface 19B is formed on the upper front end side of the counterweight 19 so as to be a flat surface that is one step lower than the upper surface 19A, and extends in the left and right directions. The upper frame 31 is attached.

  An engine 21 is provided on the revolving frame 11 in front of the counterweight 19. The engine 21 is provided on each of the lower brackets 17 provided on the left and right vertical plates 12B and 12C of the center frame 12. It is supported in an anti-vibration state via an engine mount 18 and is disposed in a horizontal state extending in the left and right directions. As shown in FIGS. 3 and 4, four engine side brackets 21 </ b> A, 21 </ b> A,... Attached to each frame side bracket 34 to be described later are provided on the upper side of the engine 21.

  A hydraulic pump 22 is provided on the right side of the engine 21. The hydraulic pump 22 is driven by the engine 21 to supply operating hydraulic oil to various hydraulic actuators mounted on the hydraulic excavator 1. Is. On the other hand, a cooling fan 23 is provided on the left side of the engine 21, and the cooling fan 23 is driven by the engine 21 to take cooling air into the building cover 6, and this cooling air is sent to a heat exchange device 24 described later. To supply.

  A heat exchanging device 24 is provided adjacent to the left side of the cooling fan 23. The heat exchanging device 24 supplies and discharges the radiator 24A for cooling the cooling water of the engine 21 and the hydraulic actuators mounted on the excavator 1. An oil cooler 24B that cools the hydraulic oil to be used.

  Here, the radiator 24A has a heat radiating portion through which the cooling water from the engine 21 circulates, and heats the engine cooling water in the heat radiating portion to radiate heat into the cooling air, thereby cooling the engine cooling water. Is. On the other hand, the oil cooler 24B has a heat radiating portion into which return oil from each hydraulic actuator of the hydraulic excavator 1 flows, and the heat of the return oil is exchanged in the heat radiating portion to dissipate it into the cooling air, thereby operating oil It is what cools. The lower end portion of the heat exchange device 24 is attached to the left overhanging beam 15 of the swivel frame 11 using a plurality of bolts 25, and the upper end portion of the heat exchange device 24 is attached to an upper frame 31 described later. ing.

  A hydraulic oil tank 26 is provided on the right end side of the revolving frame 11 and is located on the front side of the hydraulic pump 22. The hydraulic oil tank 26 stores hydraulic oil supplied to a hydraulic actuator mounted on the hydraulic excavator 1. To do. The lower end portion of the hydraulic oil tank 26 is attached to the right side frame 14 and the right extension beam 16 of the revolving frame 11 using bolts 25, and the upper end portion of the hydraulic oil tank 26 is attached to an upper frame 31 described later. It has a configuration.

  A fuel tank 27 is provided on the right end side of the revolving frame 11 and is located on the front side of the hydraulic oil tank 26. The fuel tank 27 stores fuel supplied to the engine 21. The lower end of the fuel tank 27 is attached to the right side frame 14 and the right extension beam 16 of the revolving frame 11 using bolts (not shown), and the upper end of the fuel tank 27 is attached to an upper frame 31 described later. It is configured to be attached.

  Reference numeral 31 denotes an upper frame provided above the revolving frame 11, and the upper frame 31 is an upper part of each mounted device including the above-described counterweight 19, engine 21, heat exchange device 24, hydraulic oil tank 26, and fuel tank 27. By attaching the side, these mounted devices are sandwiched and supported between the revolving frame 11 from above and below.

  Here, as shown in FIG. 5 and the like, the upper frame 31 is formed as a substantially L-shaped frame body having a large rigidity by using a plurality of beam members, and includes a rear frame portion 32 and a front frame portion 33 described later. Each frame side bracket 34 is configured.

  Reference numeral 32 denotes a rear frame portion constituting the rear side of the upper frame 31. The rear frame portion 32 includes a front horizontal beam 32A and a rear horizontal beam 32B extending in parallel to each other in the left and right directions, and the front horizontal beam 32A and the rear horizontal beam 32B. The left vertical beam 32C, the right vertical beam 32D, and the middle vertical beam 32E, which are connected to each other and extend in the front and rear directions, are formed in a rectangular frame shape extending in the left and right directions as a whole. The front horizontal beam 32A, the rear horizontal beam 32B, and the left vertical beam 32C are provided with bolt insertion holes 32F, 32F,.

  Reference numeral 33 denotes a front frame portion that constitutes the front side of the upper frame 31. The front frame portion 33 includes a left vertical beam 33A, a right vertical beam 33B, and these left vertical beams 33A that extend in parallel in the front and rear directions. The front horizontal beam 33C and the rear horizontal beam 33D that connect the right vertical beams 33B and extend in the left and right directions are formed in a rectangular frame shape that extends in the front and rear directions as a whole. And the left vertical beam 33A and the right vertical beam 33B are provided with bolt insertion holes 33E, 33E,.

  34, 34,... Are four frame side brackets provided on the lower surface side of the rear frame portion 32. Each of the frame side brackets 34 is provided on the lower surface side of the front horizontal beam 32A and the rear horizontal beam 32B constituting the rear frame portion 32. The two are fixed to each other by means of welding or the like, and extend toward each engine-side bracket 21 </ b> A provided in the engine 21.

  As shown in FIGS. 2 to 4, the rear horizontal beam 32 </ b> B of the rear frame portion 32 constituting the upper frame 31 is attached to the upper frame attachment surface 19 </ b> B of the counterweight 19 using a bolt 35, and the rear frame portion 32. Each frame side bracket 34 is attached to each engine side bracket 21A of the engine 21 via a vibration isolator 36 which will be described later, and the left vertical beam 32C of the rear frame portion 32 has a bolt 35 attached to the upper surface of the heat exchange device 24. It is configured to be used.

  The left and right vertical beams 33A and 33B of the front frame portion 33 constituting the upper frame 31 and the front horizontal beams 32A of the rear frame portion 32 are attached to the upper surface of the hydraulic oil tank 26 using bolts 35, The left and right vertical beams 33 </ b> A and 33 </ b> B of the frame portion 33 are configured to be attached to the upper surface of the fuel tank 27 using bolts 35.

  As described above, the mounted devices such as the counterweight 19, the engine 21, the heat exchange device 24, the hydraulic oil tank 26, and the fuel tank 27 that are mounted on the swing frame 11 are sandwiched between the swing frame 11 and the upper frame 31. By supporting them in place, the upper side of each mounted device is constrained, and the upper side of each mounted device can be prevented from greatly vibrating due to vibration generated during operation of the hydraulic excavator 1. Further, the upper frame 31 is configured to be housed in the building cover 6 together with the engine 21, the heat exchange device 24, the hydraulic oil tank 26, the fuel tank 27, and the like.

  36 is an anti-vibration device provided between the engine 21 and the upper frame 31 among the mounted devices, and each anti-vibration device 36 has a prismatic shape using an elastic material such as rubber as shown in FIG. And the pair of flange plates 36B and 36C fixed to the elastic body 36A. One flange plate 36B is fixed to the engine side bracket 21A of the engine 21 and the other flange plate 36C is fixed to the frame side bracket 34 of the upper frame 31 using bolts 35.

  The vibration isolator 36 provided between the engine 21 and the upper frame 31 absorbs vibration of a relatively high frequency generated when the engine 21 is operated by elastic deformation of the elastic body 36A. In addition to reducing the noise caused by the vibration of the operator, the ride comfort of the operator who has entered the cab 5 is improved.

  The hydraulic excavator 1 according to the present embodiment has the above-described configuration. The hydraulic excavator 1 uses the working device 4 while turning the upper swinging body 3 after the lower traveling body 2 self-travels to the work site. Excavation work such as earth and sand.

  Here, when the excavator 1 travels on rough terrain or the like, the counterweight 19 has vibrations in the front and rear directions (pitching vibration) around the axis extending in the left and right directions (vehicle width direction), Alternatively, vibration in the left and right directions (rolling vibration) is generated around an axis extending in the front and rear directions (vehicle length direction).

  Further, when the working device 4 is moved up and down during excavation work, when the rear portion of the lower traveling body 2 is lifted upward during excavation work by the working device 4, the work device 4 is pressed against the ground. The counterweight is pitched even when the jackup operation for lifting the front side of the lower traveling body 2 is performed and then the jackup operation is canceled and the front side of the lower traveling body 2 is lowered to the ground. Generates vibration, rolling vibration, etc.

  As described above, when the counterweight 19 generates pitching vibration, rolling vibration or the like during the operation of the hydraulic excavator 1, the vibration is transmitted from the swing frame 11 to the engine 21, the heat exchange device 24, the hydraulic oil tank mounted on the swing frame 11. 26, the fuel tank 27, etc.

  However, in the present embodiment, the upper side of each mounted device such as the counterweight 19 attached to the revolving frame 11, the engine 21, the heat exchange device 24, the hydraulic oil tank 26, and the fuel tank 27 is disposed on the lower side. Since each of the mounted devices is supported by being sandwiched from above and below by the revolving frame 11 and the upper frame 31 by attaching to the upper frame 31 disposed above the upper frame 31, It can be restrained by the frame 31.

  Therefore, even if the vibration generated during the operation of the hydraulic excavator 1 is transmitted from the swing frame 11 to each mounted device such as the counterweight 19, the engine 21, the heat exchange device 24, the hydraulic oil tank 26, the fuel tank 27, etc. Large vibrations on the upper side of the on-board equipment can be suppressed. As a result, the load acting on the mounting portion between each mounted device such as the counterweight 19, the engine 21, the heat exchange device 24, the hydraulic oil tank 26, the fuel tank 27, and the swivel frame 11 is reduced and its durability is increased. And the durability of each mounted device itself can be increased.

  In addition, by providing the vibration isolator 36 between the engine 21 and the upper frame 31, vibration of a relatively high frequency generated when the engine 21 operates can be absorbed by elastic deformation of the elastic body 36A. The noise caused by the vibration of the engine 21 can be reduced, and the riding comfort of the operator who gets into the cab 5 can be improved.

  Next, FIG. 7 shows a second embodiment of the present invention. The feature of this embodiment is that the upper frame is constituted by a plurality of upper frame divided bodies. In the present embodiment, the same components as those in the first embodiment described above are denoted by the same reference numerals, and the description thereof is omitted.

  In the figure, reference numeral 41 denotes an upper frame used in the present embodiment instead of the upper frame 31 according to the first embodiment. The upper frame 41 includes a rear upper frame divided body 42 and a front upper frame divided which will be described later. And a body 44.

  Reference numeral 42 denotes a rear upper frame divided body which constitutes the upper frame 41 together with a front upper frame divided body 44 which will be described later. The rear upper frame divided body 42 includes a front horizontal beam 42A extending in the left and right directions parallel to each other, and a rear A rectangular frame extending in the left and right directions as a whole by the horizontal beam 42B and the left vertical beam 42C, the right vertical beam 42D, and the middle vertical beam 42E that connect the front horizontal beam 42A and the rear horizontal beam 42B and extend in the front and rear directions. It is formed in a shape.

  Here, a quadrangular recessed portion 42F to be engaged with an engaging convex portion 44F described later is formed at a portion where the front horizontal beam 42A and the right vertical beam 42D intersect, and the front horizontal beam 42A and the middle vertical beam 42E intersect. A quadrangular recessed portion 42G is formed at the site to engage an engaging convex portion 44E described later. Further, bolt insertion holes 42H, 42H,... Through which the bolts 35 are inserted are formed in the concave portions 42F, 42G, the rear horizontal beam 42B, and the left vertical beam 42C, respectively.

  43 are four frame side brackets provided on the lower surface side of the rear upper frame divided body 42, and each of these frame side brackets 43 is provided on the lower surface side of the front horizontal beam 42A and the rear horizontal beam 42B. They are fixed using means such as welding. Each frame side bracket 43 is attached to each engine side bracket (none of which is shown) provided in the engine.

  Reference numeral 44 denotes a front upper frame divided body. The front upper frame divided body 44 includes a left vertical beam 44A and a right vertical beam 44B extending in parallel with each other in the front and rear directions, and between the left vertical beam 44A and the right vertical beam 44B. Are formed in a rectangular frame shape extending in the front and rear directions as a whole by the front horizontal beam 44C and the rear horizontal beam 44D extending in the left and right directions.

  Here, at the rear end portion of the left vertical beam 44A, a rectangular engagement convex portion 44E that engages with the concave portion 42G of the rear upper frame divided body 42 is formed, and at the rear end portion of the right vertical beam 44B. Is formed with a quadrangular engagement convex portion 44F that engages with the concave portion 42F of the rear upper frame divided body 42. Further, bolt insertion holes 44G, 44G,... Through which the bolts 35 are inserted are formed in the respective engaging convex portions 44E, 44F, the left vertical beam 44A, and the right vertical beam 44B.

  Then, by engaging the engaging convex portions 44E and 44F formed on the front upper frame divided body 44 with the recessed portions 42F and 42G formed on the rear upper frame divided body 42, the rear upper frame A splittable upper frame 41 including a split body 42 and a front upper frame split body 44 is configured.

  The hydraulic excavator according to the present embodiment has the splittable upper frame 41 as described above, and the basic operation thereof is not particularly different from that according to the first embodiment described above.

  However, according to the present embodiment, when performing an inspection operation or the like on each mounted device sandwiched between the turning frame 11 and the upper frame 41, the upper frame 41 is separated from the rear upper frame divided body 42 and the front side. It can be divided into an upper frame divided body 44. Thereby, since only the divided body attached to the mounted device to be inspected among the rear upper frame divided body 42 and the front upper frame divided body 44 can be easily removed, each mounted device can be attached to the revolving frame 11 and the upper portion. Even in a state of being sandwiched between and supported by the frame 41, inspection work for each mounted device can be easily performed.

  Next, FIG. 8 and FIG. 9 show a third embodiment of the present invention, and the feature of this embodiment is that a vibration isolator is provided between the upper frame and each mounted device. . In the present embodiment, the same components as those in the first embodiment described above are denoted by the same reference numerals, and the description thereof is omitted.

  , 51 are vibration isolators provided between the upper frame 31 and each mounted device such as the counterweight 19, the heat exchange device 24, the hydraulic oil tank 26, the fuel tank 27, and the like. Is formed using an elastic body such as rubber. The vibration isolator 51 includes the counterweight 19 and the upper frame 31, the heat exchange device 24 and the upper frame 31, the hydraulic oil tank 26 and the upper frame 31, the fuel tank 27 and the upper frame 31. Are respectively attached using bolts 35.

  Here, the vibration isolator 51 absorbs this vibration by the deformation of the elastic body when the swing frame 11 generates a vibration of a relatively high frequency, for example, when the excavator is traveling or excavating. It is. As a result, each mounted device such as the counterweight 19, the heat exchange device 24, the hydraulic oil tank 26, and the fuel tank 27 attached to the swing frame 11 is prevented from resonating with high-frequency vibration generated by the swing frame 11. It has a configuration that can.

  The hydraulic excavator according to the present embodiment has the above-described configuration, and the basic operation thereof is not particularly different from that according to the first embodiment described above.

  However, according to the present embodiment, the anti-vibration device 51 is provided between each mounted device such as the counterweight 19, the heat exchange device 24, the hydraulic oil tank 26, and the fuel tank 27 and the upper frame 31. For example, even if the swing frame 11 generates vibrations having a relatively high frequency during traveling of the hydraulic excavator, excavation work, etc., the vibration isolator 51 suppresses each mounted device from resonating with the vibration of the swing frame 11. Can do. As a result, the counterweight 19, the heat exchanging device 24, the hydraulic oil tank 26, the fuel tank 27, and the like are prevented from being damaged by resonating with the high-frequency vibration generated by the swivel frame 11, and the durability of each of these mounted devices. Can be increased.

  Next, FIGS. 10 to 14 show a fourth embodiment of the present invention. The feature of the present embodiment is that a vertical connecting member for connecting the upper frame and the main frame in the upward and downward directions is provided. It is in the configuration. In the present embodiment, the same components as those in the first embodiment described above are denoted by the same reference numerals, and the description thereof is omitted.

  In the figure, reference numeral 61 denotes an upper frame used in this embodiment in place of the upper frame 31 according to the first embodiment. The upper frame 61 includes a plurality of beams as shown in FIGS. It is formed as a frame body having a large rigidity using a material, and includes a rear frame portion 62, a front frame portion 63, each frame side bracket 64, and the like which will be described later.

  Reference numeral 62 denotes a rear frame portion constituting the rear side of the upper frame 61. The rear frame portion 62 includes a front transverse beam 62A, a middle transverse beam 62B, a rear transverse beam 62C, and a middle transverse beam 62B, which extend in the left and right directions in parallel with each other. The left vertical beam 62D extending forward and rearward connecting the horizontal beam 62C, the right vertical beam 62E extending frontward and rearward connecting the front horizontal beam 62A and the rear horizontal beam 62C, and the left and right verticals A left vertical plate mounting beam 62F to which a left vertical plate 66, which will be described later, is mounted, and a right vertical plate mounting beam 62G to which a right vertical plate 67 is mounted, are positioned left and right as a whole, positioned between the beams 62D and 62E. It is formed in a substantially rectangular frame shape extending in the right direction.

  Here, the rear end portion of the right vertical beam 62E is fixed to the rear horizontal beam 62C, and the front side of the right vertical beam 62E extends forward from the front horizontal beam 62A, and constitutes a part of a front frame portion 63 described later. ing. The left vertical plate mounting beam 62F and the right vertical plate mounting beam 62G have their rear ends fixed to the rear horizontal beam 62C, and the front side extends forward from the middle horizontal beam 62B.

  10 and 11, the left vertical plate mounting beam 62F faces the left vertical plate 12B constituting the revolving frame 11 in the upper and lower directions, and the right vertical plate mounting beam 62G is the right vertical plate. It is configured to face 12C in the upward and downward directions. Further, bolt insertion holes 62H, 62H,... Through which bolts 65 described later are inserted into the front horizontal beam 62A, the middle horizontal beam 62B, the rear horizontal beam 62C, the left vertical beam 62D, and the right vertical beam 62E constituting the rear frame portion 62, respectively. Is drilled.

  Reference numeral 63 denotes a front frame portion which is arranged on the right front side of the rear frame portion 62 and constitutes the front portion side of the upper frame 61. The front frame portion 63 is parallel to the front horizontal beam 62A of the rear frame portion 62 in the left and right directions. The front horizontal beam 63A extending, the front horizontal beam 63A and the front horizontal beam 62A of the rear frame portion 62 are connected to each other, and the left vertical beam 63B extending in the front and rear directions and the right vertical beam 62E of the rear frame portion 62 are integrally formed. It is formed in a U shape by a right vertical beam 63C extending in the front and rear directions in parallel with the left vertical beam 63B.

  Further, in the left vertical beam 63B and the right vertical beam 63C constituting the front frame portion 63, bolt insertion holes 63D, 63D,. In the present embodiment, the case where the right vertical beam 62E of the rear frame portion 62 and the right vertical beam 63C of the front frame portion 63 are integrally formed is illustrated, but the right vertical beam 62E and the right vertical beam 63C are illustrated. It may be configured by a separate member.

  64, 64,... Are four frame side brackets provided on the lower surface side of the rear frame portion 62. Each of the frame side brackets 64 is provided on the lower surface side of the middle horizontal beam 62B and the rear horizontal beam 62C constituting the rear frame portion 62. The two are fixed to each other by means of welding or the like, and extend toward each engine side bracket 21A provided on the engine 21 as shown in FIGS.

  10 to 12, the rear lateral beam 62C of the rear frame portion 62 is attached to the upper frame attachment surface 19B of the counterweight 19 using bolts 65, and each frame side bracket 64 of the rear frame portion 62 is attached. Is attached to each engine side bracket 21A of the engine 21 via a vibration isolator 36, and the left vertical beam 62D of the rear frame portion 62 is attached to the upper surface of the heat exchange device 24 using bolts 65. Yes.

  The front horizontal beam 62A, the middle horizontal beam 62B, and the right vertical beam 62E of the rear frame portion 62 are attached to the upper surface of the hydraulic oil tank 26 using bolts 65, and the left vertical beam 63B and the right vertical beam 63C of the front frame portion 63 are attached. Is configured to be attached to the upper surface of the fuel tank 27 using bolts 65.

  66 is a left vertical plate as a vertical connecting member provided between the upper frame 61 and the revolving frame 11, and the left vertical plate 66 is located between the left vertical plate mounting beam 62 </ b> F of the upper frame 61 and the revolving frame 11. Are connected in the upward and downward directions.

  67 is a right vertical plate as a vertical connecting member provided between the upper frame 61 and the revolving frame 11, and the right vertical plate 67 is located between the right vertical plate mounting beam 62 </ b> G of the upper frame 61 and the revolving frame 11. Are connected in the upward and downward directions.

  Here, as shown in FIGS. 12 and 13, etc., the left vertical plate 66 is formed in a substantially rectangular flat plate shape using, for example, a thick steel plate material and the like, from the middle part in the front and rear directions to the rear part. The range is provided with an opening 66A extending in the upward and downward direction with the lower end side being an open end. Further, as shown in FIG. 11, a rectangular parallelepiped spacer 66 </ b> B that contacts the left vertical plate 12 </ b> B of the swivel frame 11 is protruded from the lower end side of the left vertical plate 66 and a bolt 68 described later is inserted. A plurality of bolt insertion holes 66C are formed.

  On the other hand, like the left vertical plate 66, the right vertical plate 67 is formed in a substantially rectangular flat plate shape provided with an opening 67A, and a spacer 67B protrudes from the lower end side of the right vertical plate 67 and a plurality of spacers 67B are provided. Bolt insertion hole 67C is formed.

  The upper end side of the left vertical plate 66 is fixed to the left vertical plate mounting beam 62F of the upper frame 61 by means of welding or the like as shown in FIG. 14 and the like, and the lower end side of the left vertical plate 66 is fixed to FIG. As shown in the figure, the left vertical plate 12B of the revolving frame 11 is fixed to the left vertical plate 12B with a bolt 68 with the spacer 66B in contact with the left vertical plate 12B, and the engine 21 is placed in the opening 66A of the left vertical plate 66. Is arranged.

  On the other hand, the upper end side of the right vertical plate 67 is fixed to the right vertical plate mounting beam 62G of the upper frame 61 using means such as welding, and the lower end side of the right vertical plate 67 is fixed to the right vertical plate 12C of the revolving frame 11. The spacer 67 </ b> B is in contact with the right vertical plate 12 </ b> C using bolts 68, and the engine 21 is disposed in the opening 67 </ b> A of the right vertical plate 67.

  As described above, in the present embodiment, the revolving frame 11 on which the mounted devices such as the counterweight 19, the engine 21, the heat exchange device 24, the hydraulic oil tank 26, the fuel tank 27, and the like are mounted, and the upper side of each mounted device are The upper frame 61 is connected to the upper frame 61 using a left vertical plate 66 and a right vertical plate 67 in the upward and downward directions.

  The present embodiment has the above-described configuration. By attaching the upper side of a plurality of mounted devices mounted on the turning frame 11 to the upper frame 61, the upper side of each of the mounted devices is restrained by the upper frame 61. In addition, the upper frame 61 is largely displaced (vibrated) with respect to the revolving frame 11 by connecting the upper frame 61 and the revolving frame 11 using the left vertical plate 66 and the right vertical plate 67. Can be suppressed.

  As a result, the load acting on the mounting portion between the swivel frame 11 and each mounted device such as the counterweight 19, the engine 21, the heat exchange device 24, the hydraulic oil tank 26, and the fuel tank 27 that are attached to the upper frame 61. Since it can further reduce, durability of the attachment part of each mounting apparatus and the revolving frame 11 and durability of each mounting apparatus itself can be improved further.

  In the first embodiment described above, the five mounted devices of the counterweight 19, the engine 21, the heat exchange device 24, the hydraulic oil tank 26, and the fuel tank 27 mounted on the swing frame 11 are connected to the swing frame 11 and the upper part. The case where it pinches | interposes and supports between the frames 31 is illustrated. However, the present invention is not limited to this, and at least two mounted devices that are desired to suppress vibration among these mounted devices are supported by being sandwiched between the turning frame 11 and the upper frame 31. What is necessary is just to restrain the upper part side of a mounting apparatus by the upper flame | frame 31. FIG.

  That is, for example, as in the modification shown in FIG. 15, among the mounted devices mounted on the swing frame 11, the three mounted devices of the counterweight 19, the engine 21, and the heat exchange device 24 are replaced by the swing frame 11 and the upper frame 31. The upper side of the counterweight 19, the engine 21, and the heat exchange device 24 may be constrained by the upper frame 31 '.

  Further, for example, as in another modification shown in FIG. 16, two mounted devices, that is, the hydraulic oil tank 26 and the fuel tank 27 among the mounted devices mounted on the swivel frame 11 are replaced by the swivel frame 11 and the upper frame 31. The upper side of the hydraulic oil tank 26 and the fuel tank 27 may be constrained by the upper frame 31 ″ by sandwiching and supporting the hydraulic oil tank 26 ″.

  In the first embodiment described above, the case where the vibration isolator 36 having the elastic body 36A made of an elastic material such as rubber is provided between the engine 21 and the upper frame 31 is illustrated. However, the present invention is not limited to this. For example, as in the modification shown in FIG. 17, a vibration isolating device 54 including a spring 52 and an oil damper 53 is provided between the engine 21 and the upper frame 31. Also good.

  Further, in the above-described fourth embodiment, the case where the vibration isolator 36 is provided only between each frame-side bracket 64 of the upper frame 61 and the engine 21 is illustrated. However, the present invention is not limited to this. For example, as in the modification shown in FIG. 18, between the upper frame 61 and each mounted device such as the counterweight, the heat exchange device 24, the hydraulic oil tank 26, and the fuel tank. Further, for example, a vibration isolator 69 formed using an elastic body such as rubber may be provided.

  Further, in the above-described fourth embodiment, the upper frame of the five mounted devices, that is, the counterweight 19, the engine 21, the heat exchange device 24, the hydraulic oil tank 26, and the fuel tank 27 mounted on the revolving frame 11 is used as the upper frame. The case where it attaches to 61 is illustrated. However, the present invention is not limited to this, and the upper side of any two or more mounted devices among these mounted devices may be attached to the upper frame 61.

  Further, in the above-described fourth embodiment, the case where the upper frame 61 and the revolving frame 11 are connected using two vertical connecting members including the left vertical plate 66 and the right vertical plate 67 is illustrated. ing. However, the present invention is not limited to this. For example, the upper frame 61 and the revolving frame 11 may be connected using one or three or more vertical connecting members.

  In the above-described fourth embodiment, the upper ends of the left vertical plate 66 and the right vertical plate 67 are fixed to the upper frame 61 by welding or the like, and the lower end side is attached to the revolving frame 11 using the bolts 65. Is illustrated. However, the present invention is not limited to this. For example, the upper ends of the left vertical plate 66 and the right vertical plate 67 are each attached to the upper frame 61 using bolts, and the lower ends are attached to the revolving frame 11 using bolts 65. Also good.

  Furthermore, in the above-described fourth embodiment, the case where the upper frame 61 is configured as an integrated body composed of the rear frame portion 62 and the front frame portion 63 is illustrated. However, the present invention is not limited to this, and an upper frame constituted by two or more upper frame divided bodies may be used.

  Further, in each of the embodiments described above, the counterweight 19, the engine 21, the heat exchange device 24, the hydraulic oil tank 26, and the fuel tank 27 are illustrated as the mounted devices mounted on the revolving frame 11. However, the present invention is not limited to this, and other devices such as a control valve unit for controlling the direction of pressure oil supplied to and discharged from various hydraulic actuators from the hydraulic pump 22 and a battery (both not shown) are also included. These are included in the equipment mounted on the swivel frame 11.

  In the second embodiment described above, the case where the upper frame 41 is configured by two frame divided bodies, that is, the rear upper frame divided body 42 and the front upper frame divided body 44 is illustrated. However, the present invention is not limited to this, and the upper frame may be constituted by, for example, three or more frame division bodies.

  Furthermore, in each embodiment mentioned above, the hydraulic excavator is illustrated as a working machine. However, the present invention is not limited to this, and can be widely applied to other construction machines such as hydraulic cranes and wheel loaders, and work machines such as lift trucks.

1 is a front view showing a hydraulic excavator to which a first embodiment of the present invention is applied. It is a top view of the excavator which removed the working device and the building cover. It is sectional drawing which looked at the turning frame, the engine, the upper frame, etc. from the direction of arrows III-III in FIG. It is sectional drawing which looked at the turning frame, the engine, the upper frame, etc. from the arrow IV-IV direction in FIG. It is a perspective view which shows an upper frame alone. It is an expanded sectional view which expands and shows the vibration isolator etc. in FIG. It is a disassembled perspective view which decomposes | disassembles and shows the upper frame by 2nd Embodiment to the rear upper frame division body and the front upper frame division body. It is sectional drawing similar to FIG. 3 which shows each mounting apparatus, upper frame, vibration isolator, etc. by 3rd Embodiment. It is sectional drawing similar to FIG. 4 which shows each mounting apparatus, upper frame, vibration isolator, etc. by 3rd Embodiment. It is a top view similar to FIG. 2 which shows the hydraulic shovel provided with the upper frame by 4th Embodiment. It is sectional drawing which looked at the turning frame, the upper frame, the left vertical board, the right vertical board, etc. from the arrow XI-XI direction in FIG. It is sectional drawing which looked at the turning frame, the upper frame, the left vertical board, etc. from the arrow XII-XII direction in FIG. It is a disassembled perspective view in the state which decomposed | disassembled the upper frame, the left vertical board, and the right vertical board. It is a perspective view which shows the state which attached the left vertical board and the right vertical board to the upper frame. FIG. 5 is a plan view similar to FIG. 2 showing a modification in which a counterweight, an engine, and a heat exchange device are sandwiched and supported between a turning frame and an upper frame. FIG. 10 is a plan view similar to FIG. 2 showing another modification example in which a hydraulic oil tank and a fuel tank are sandwiched and supported between a revolving frame and an upper frame. It is an expanded sectional view similar to FIG. 6 which shows the modification of the vibration isolator provided between an engine and an upper frame. It is sectional drawing similar to FIG. 8 which shows the modification which provided the vibration isolator between the upper frame by 4th Embodiment, and each mounting apparatus.

Explanation of symbols

11 Rotating frame (main frame)
19 Counterweight (equipped equipment)
21 Engine (equipped equipment)
24 Heat exchange device (equipment)
26 Hydraulic oil tank (equipped equipment)
27 Fuel tank (equipped equipment)
31, 31 ', 31 ", 41, 61 Upper frame 36, 51, 54, 69 Anti-vibration device 42 Rear upper frame divided body (upper frame divided body)
44 Front upper frame division (upper frame division)
66 Left vertical plate (vertical connecting material)
67 Right vertical plate (vertical connecting material)

Claims (4)

In a work machine comprising a main frame which is provided with a work structure and a work structure, and a mounted equipment including a counterweight, an engine, a heat exchange device, a fuel tank, and a hydraulic oil tank mounted on the main frame,
A working machine comprising an upper frame that supports upper sides of at least two mounted devices among the mounted devices.   2. The work machine according to claim 1, wherein a vibration isolator is provided between the engine and the upper frame among the mounted devices.   The work machine according to claim 1, wherein the upper frame is configured by a plurality of upper frame division bodies that can be divided.   The work machine according to claim 1, 2, or 3, wherein a vertical connection member that connects the upper frame and the main frame in an upward and downward direction is provided.

Images