JP5296640B2 - Work vehicle and method for removing generator motor from work vehicle - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a working vehicle capable of easily removing a dynamo motor, and capable of suppressing the increase in the cost of manufacturing. <P>SOLUTION: In the working vehicle, a first support section 31 includes: a first elastic member 53 for supporting a load from the dynamo motor 23; and a first retention mechanism 54 for keeping the first elastic member 53 in a compressed state. The first support section 31 is mounted on a vehicle body frame 35 and the dynamo motor 23 in the state that the first elastic member 53 is compressed by the first retention mechanism 54 so as to support the dynamo motor 23. A second support section 32 is mounted on the vehicle body frame 35 and an engine 21 so as to support the engine 21. A first auxiliary support section 36 is arranged between the first support section 31 and the second support section 32, and mounted either on the engine 21 or the vehicle body frame 35 so as to support the engine 21. Further, the first auxiliary support section 36 can adjust the height in support of the engine 21 with respect to the vehicle body frame 35. <P>COPYRIGHT: (C)2011,JPO&amp;INPIT

Description

  The present invention relates to a work vehicle and a method for removing a generator motor from the work vehicle.

  In the work vehicle, the engine is placed on the vehicle body frame via a support portion including an elastic member. For example, Patent Document 1 discloses that an engine is supported by a vibration isolation support device including an elastic member.

  Incidentally, in recent years, a so-called hybrid work vehicle including a drive unit including an engine and a generator motor has been developed (see Patent Document 2). In such a working vehicle, the generator motor is disposed on the side of the engine and is attached to the engine. The generator motor generates power by the driving force of the engine. Electric energy generated by the power generation by the generator motor is stored in a power storage device such as a capacitor. When the vehicle requires a large engine output, the generator / motor is driven by the stored electric energy to assist the engine output.

JP-A-9-177888 JP 2001-16704 A

  In the hybrid work vehicle as described above, in consideration of the balance of the center of gravity of the drive unit, a support portion is provided for each of the engine and the generator motor, and the drive unit is supported by the vehicle body frame by these support portions. .

  When replacing the generator motor, such as when the generator motor has failed, remove the generator and motor from the vehicle while the engine and generator motor are integrated, or remove the generator motor from the engine and It is conceivable to remove only the motor from the vehicle. However, when the engine and the generator / motor are removed from the vehicle in an integrated state, it is necessary to lift a very large and heavy object with a crane, which requires a large facility. Moreover, since the engine is removed from the vehicle, maintenance work becomes complicated.

  When only the generator motor is removed from the vehicle, the engine remaining in the vehicle loses support on the generator motor side. For this reason, when the number of support parts on the engine side is small, it is necessary to support the engine with a crane. However, even in this case, large-scale facilities are required. Further, if the number of support portions is increased in order to eliminate the need for support with a crane, the manufacturing cost increases. It is also difficult to secure an installation space for the support portion.

  An object of the present invention is to provide a work vehicle in which a generator motor can be easily removed and an increase in manufacturing cost can be suppressed, and a generator motor removal method in the work vehicle.

  A work vehicle according to a first aspect of the present invention includes an engine, a generator / motor, a body frame, a first support portion, a second support portion, and an auxiliary support portion. The generator motor is disposed on the side of the engine and is detachably attached to the engine. The generator motor generates power by the driving force of the engine and assists the output of the engine by electric energy stored at the time of power generation. An engine and a generator motor are placed on the body frame. The first support portion includes an elastic member that supports a load from the generator motor and a holding mechanism that holds the elastic member in a compressed state. The first support portion is attached to the vehicle body frame and the generator motor in a state where the elastic member is compressed by the holding mechanism, and supports the generator motor. The second support portion is attached to the vehicle body frame and the engine and supports the engine. The auxiliary support portion is disposed between the first support portion and the second support portion, and is attached to the engine or the vehicle body frame to support the engine. Further, the auxiliary support portion can adjust the support height of the engine with respect to the vehicle body frame.

  In this work vehicle, when removing the generator motor, the worker releases the holding of the elastic member by the holding mechanism. At this time, the elastic member expands so as to return to the original state from the compressed state. For this reason, an engine and a generator motor will be in the state inclined so that the generator motor side may be located above the engine side.

  Next, the operator adjusts the support height of the engine to a height at which the elastic member can be removed from the first support portion by the auxiliary support portion. At this time, the engine is supported by the second support portion and the auxiliary support portion. And an operator removes an elastic member from the 1st support part.

  Next, the operator returns the support height of the engine to the height before releasing the holding of the elastic member by the auxiliary support portion. Thereby, the engine and the generator motor are in a normal mounting state, that is, a state in which the elastic member is held by the holding mechanism and the engine and the generator motor are supported by the first support portion and the second support portion. It will be the same posture as in And an operator removes a generator motor from an engine.

  In this work vehicle, the generator motor can be removed without supporting the engine by the crane as described above. For this reason, a generator motor can be removed easily. Further, the auxiliary support portion only needs to function when the generator motor is removed, and does not need to function during normal use. Rather than increasing the number of support parts, an auxiliary support part is provided, so that a simple structure can be achieved as compared with the support part. For this reason, the increase in manufacturing cost can be suppressed.

  Furthermore, as described above, the first support portion supports the generator motor in a state where the elastic member is compressed. Therefore, when the holding of the elastic member is released, the engine, the generator motor, and the like are expanded by the expansion of the elastic member. Will be tilted. Thus, in a state where the engine and the generator / motor are inclined, it is difficult to remove the generator / motor from the engine. However, in the present invention, the support height of the engine can be easily returned to the height before the holding of the elastic member is released by the auxiliary support portion. Thereby, the engine and the generator motor can be returned to the same posture as the posture before the holding of the elastic member is released. Thereby, a generator motor can be easily removed from an engine.

  A work vehicle according to a second invention is the work vehicle according to the first invention, wherein the body frame has a first main beam and a second main beam. The first main beam and the second main beam are arranged at a distance in the vehicle width direction and extend in the front-rear direction. The second support portion is attached to the second main beam and the engine. The auxiliary support portion supports the engine between the first main beam and the engine.

  In this work vehicle, the engine is supported by the first main beam via the auxiliary support member and is also supported by the second main beam via the second support portion. Thereby, an engine can be supported stably.

  A work vehicle according to a third aspect is the work vehicle according to the second aspect, wherein the engine includes an engine body and a flange portion. The engine body is provided from between the first main beam and the second main beam to the outside of the first main beam in the vehicle width direction and above the first main beam. The flange portion is disposed outside the first main beam and protrudes downward from the engine body. A generator motor is attached to the flange portion. The auxiliary support part is attached to the flange part.

  In this work vehicle, the auxiliary support portion is attached to the flange portion disposed outside the first main beam. Thereby, an auxiliary | assistant support part can be attached to a desired position with a simple structure.

  A work vehicle according to a fourth aspect is the work vehicle according to the third aspect, wherein the auxiliary support part has a fixed part and a movable part. The fixed part is fixed to the flange part. The movable part is provided so as to be movable with respect to the fixed part so as to approach and separate from the first main beam. The auxiliary support portion adjusts the support height of the engine with respect to the vehicle body frame by adjusting the amount of movement of the movable portion relative to the fixed portion.

  In this work vehicle, the support height of the engine can be increased by moving the movable part in a direction close to the first main beam and pressing the first main beam. Further, the support height of the engine can be reduced by moving the movable part in the direction away from the first main beam.

  According to a fifth aspect of the present invention, there is provided a method for removing a generator motor from a work vehicle including an engine, a generator motor, a body frame, a first support portion, and a second support portion. This is a method of removing the motor. The generator motor is disposed on the side of the engine and is detachably attached to the engine. The generator motor generates power by the driving force of the engine and assists the output of the engine by electric energy stored at the time of power generation. An engine and a generator motor are placed on the body frame. The first support portion includes an elastic member that supports a load from the generator motor and a holding mechanism that holds the elastic member in a compressed state. The first support portion is attached to the vehicle body frame and the generator motor in a state where the elastic member is compressed by the holding mechanism, and supports the generator motor. The second support portion is attached to the vehicle body frame and the engine and supports the engine.

  The method includes a step of releasing the holding of the elastic member by the holding mechanism, a step of adjusting the support height of the engine to a height at which the elastic member can be removed by the auxiliary support portion, and the elastic member from the first support portion. A step of removing the generator motor from the engine, a step of returning the support height of the engine to the height before releasing the holding of the elastic member by the auxiliary support portion, and a step of removing the generator motor from the engine. The auxiliary support portion is disposed between the first support portion and the second support portion, and is attached to the engine or the vehicle body frame to support the engine. Further, the auxiliary support portion can adjust the support height of the engine with respect to the vehicle body frame.

  In this method of removing the generator motor from the work vehicle, the generator motor can be removed without supporting the engine by the crane as described above. For this reason, a generator motor can be removed easily. Moreover, the auxiliary | assistant support part is used instead of increasing the number of support parts. The auxiliary support portion only needs to function when the generator motor is removed, and does not need to function during normal use. For this reason, it can be made a simple structure compared with a support part. For this reason, the increase in manufacturing cost can be suppressed.

  Furthermore, as described above, the first support portion supports the generator motor in a state where the elastic member is compressed. Therefore, when the holding of the elastic member is released, the engine, the generator motor, and the like are expanded by the expansion of the elastic member. Will be tilted. Thus, in a state where the engine and the generator / motor are inclined, it is difficult to remove the generator / motor from the engine. However, in the present invention, the support height of the engine can be easily returned to the height before the holding of the elastic member is released by the auxiliary support portion. Thereby, the engine and the generator motor can be returned to the same posture as the posture before the holding of the elastic member is released. Thereby, a generator motor can be easily removed from an engine.

  In the present invention, the generator motor can be easily removed, and an increase in manufacturing cost can be suppressed.

1 is an external perspective view of a hydraulic excavator according to an embodiment of the present invention. The front view which shows the drive unit with which a hydraulic shovel is provided, and its support structure. The top view which shows a drive unit and its support structure. The block diagram which shows the structure of a hybrid system. VV sectional drawing in FIG. VI-VI sectional drawing in FIG. VII-VII sectional view in FIG. VIII-VIII sectional view in FIG. The figure which shows the removal procedure of a generator motor.

<Overall configuration>
A hydraulic excavator 100 according to an embodiment of the present invention is shown in FIG. The excavator 100 includes a vehicle body 1 and a work machine 4.

  The vehicle body 1 has a traveling body 2 and a revolving body 3. The traveling body 2 includes a pair of traveling devices 2a and 2b. Each traveling device 2a, 2b has crawler belts 2d, 2e, and the crawler belts 2d, 2e are driven by a driving force from an engine 21 described later, thereby causing the excavator 100 to travel. In the following description, the front-rear direction means the front-rear direction of the vehicle body 1. The left-right direction or the side means the vehicle width direction of the vehicle body 1. “Left” and “right” mean “left” and “right” as viewed from the operator in the cab 5.

  The swivel body 3 is placed on the traveling body 2. The swivel body 3 is provided so as to be turnable with respect to the traveling body 2. The turning body 3 is turned on the traveling body 2 by a turning electric motor 24 described later. Further, a cab 5 is provided at the front left side position of the revolving structure 3. The revolving unit 3 includes a fuel tank 14, a hydraulic oil tank 15, an engine chamber 16, and a storage chamber 17. The fuel tank 14 stores fuel for driving an engine 21 described later. The fuel tank 14 is disposed in front of the hydraulic oil tank 15. The hydraulic oil tank 15 stores hydraulic oil that is discharged from a hydraulic pump 22 described later and supplied to the hydraulic cylinders 10 to 12. The hydraulic oil tank 15 is arranged side by side with the fuel tank 14 in the front-rear direction. The engine chamber 16 houses a drive unit 30 to be described later. The engine chamber 16 is disposed behind the fuel tank 14 and the hydraulic oil tank 15. The storage compartment 17 is arranged behind the cab 5 and is arranged side by side with the engine compartment 16 in the vehicle width direction. A storage space for storing a radiator and a radiator fan (not shown) for cooling the engine 21 is provided inside the storage chamber 17. A counterweight 18 is provided behind the engine chamber 16 and the storage chamber 17.

The work machine 4 is attached to the center of the front portion of the revolving structure 3 and includes a boom 7, an arm 8, and a bucket 9. A base end portion of the boom 7 is rotatably connected to the swing body 3. Further, the distal end portion of the boom 7 is rotatably connected to the proximal end portion of the arm 8. The tip of the arm 8 is rotatably connected to the bucket 9. Further, hydraulic cylinders 10 to 12 (boom cylinder 10, arm cylinder 11 and bucket cylinder 12) are arranged so as to correspond to each of boom 7, arm 8 and bucket 9. When these hydraulic cylinders 10 to 12 are driven, the work machine 4 is driven, and work such as excavation is performed.
<Drive unit and its support structure>
The drive unit 30 provided in the excavator 100 and its support structure are shown in FIGS. FIG. 2 is a front view showing the drive unit 30 and the support structure as seen from the counterway side. FIG. 3 is a top view showing the drive unit 30 and the support structure. 2 and 3, the configuration of the drive unit 30 is simplified. The drive unit 30 includes an engine 21, a generator motor 23, and a hydraulic pump 22. The drive unit 30 is supported by the vehicle body frame 35 via the first support portion 31 to the fourth support portion 34. When the generator motor 23 is removed, the engine 21 is temporarily supported by the first auxiliary support portion 36 and the second auxiliary support portion 37.

  The vehicle body frame 35 is included in the revolving structure 3 described above. The vehicle body frame 35 includes a first main beam 41 and a second main beam 42, a first side frame 43 and a second side frame 44, and a plurality of beam members 45a to 45f.

  The first main beam 41 and the second main beam 42 are arranged at a distance in the vehicle width direction and extend in the front-rear direction. The first main beam 41 and the second main beam 42 are arranged symmetrically in the vehicle body frame 35 substantially at the center in the vehicle width direction. The rear portions of the first main beam 41 and the second main beam 42 are arranged horizontally, but the front portion is arranged so as to be inclined so that the front is located upward (see FIG. 7). In the present embodiment, the first main beam 41 is disposed on the right side, and the second main beam 42 is disposed on the left side.

  The first side frame 43 and the second side frame 44 are arranged at a distance in the vehicle width direction and extend in the front-rear direction. The first side frame 43 and the second side frame 44 are respectively disposed on both sides of the vehicle body frame 35 in the vehicle width direction. In the present embodiment, the first side frame 43 is disposed on the right side, and the second side frame 44 is disposed on the left side. The first main beam 41 and the second main beam 42 described above are disposed between the first side frame 43 and the second side frame 44 in the vehicle width direction.

  The plurality of beam members are members that extend in the vehicle width direction. The plurality of beam members 45a to 45f include first beam members 45a and 45b, second beam members 45c and 45d, and third beam members 45e and 45f. The first beam members 45 a and 45 b are provided across the first side frame 43 and the first main beam 41. The second beam members 45 c and 45 d are provided across the second side frame 44 and the second main beam 42. The third beam members 45 e and 45 f are provided across the first main beam 41 and the second main beam 42.

  The engine 21 includes an engine body 21a, an oil pan 21b, and a flange portion 21c. The engine body 21a accommodates a cylinder and a piston (not shown) inside. The engine main body 21a is provided from between a first main beam 41 and a second main beam 42, which will be described later, to the outside of the first main beam 41 through the top of the first main beam 41 in a top view.

  The oil pan 21b is attached to the bottom of the engine body 21a and receives the lubricating oil inside the engine 21. The oil pan 21b is located between the first main beam 41 and the second main beam 42 in the vehicle width direction. The portion of the oil pan 21 b on the second main beam 42 side, that is, the left side portion is located below the upper surfaces of the first main beam 41 and the second main beam 42. In addition, the part on the first main beam 41 side, that is, the right side part of the oil pan 21 b is located above the upper surfaces of the first main beam 41 and the second main beam 42.

  The flange portion 21 c is attached to the first main beam 41 side, that is, the right end portion of the engine body 21 a, and is disposed outside the first main beam 41. The flange portion 21c protrudes downward from the engine body 21a. The flange portion 21c is arranged at a minute distance in the vehicle width direction with respect to the side end portion of the oil pan 21b. The lower end portion of the flange portion 21 c is located below the upper surface of the first main beam 41. A generator motor 23 is attached to the flange portion 21c. A cooling fan 38 is attached to the second main beam 42 side, that is, the left end portion of the engine body 21a. The cooling fan 38 is located above the second main beam 42.

  The hydraulic pump 22 is disposed on the side of the generator motor 23 and is attached to the right side of the generator motor 23. The hydraulic pump 22 is driven by the engine 21 and generates hydraulic pressure for driving the hydraulic cylinders 10 to 12 described above.

  The generator motor 23 generates power by the driving force of the engine 21 and assists the output of the engine 21 by electric energy stored at the time of power generation. The generator motor 23 is disposed on the right side of the engine 21 and is detachably attached to the engine 21. Specifically, the generator motor 23 is attached to the right side surface of the flange portion 21c by a fixing means such as a bolt. Moreover, although not shown in figure, the input shaft of the generator motor 23 and the output shaft of the engine 21 are connected. The generator motor 23 is provided between the engine 21 and the hydraulic pump 22 in the vehicle width direction. The upper end portion of the generator motor 23 is located below the upper surface of the engine body 21a. The lower end portion of the generator motor 23 is located below the lower end portion of the engine body 21 a and is located below the upper surface of the first main beam 41.

  The hydraulic excavator 100 includes a hybrid system as shown in FIG. FIG. 4 is a block diagram showing the configuration of the hybrid system. The hybrid system includes an engine 21, a hydraulic pump 22, a generator motor 23, and a turning electric motor 24. The generator motor 23 is electrically connected to the capacitor 26 via the inverter 25. When the rotational speed of the engine 21 is accelerated, the generator motor 23 is driven by the electric energy stored in the capacitor 26 to assist the acceleration of the engine 21. Further, when the engine 21 is idling, power is generated using the driving force of the engine 21. Electric energy generated by power generation by the generator motor 23 is stored in the capacitor 26.

  The turning electric motor 24 turns the turning body 3 by being driven by the electric energy stored in the capacitor 26. Moreover, the turning electric motor 24 generates power when the turning speed of the turning body 3 is reduced. Electric energy generated by the power generation by the swing electric motor 24 is stored in the capacitor 26. A cooling device 27 is disposed in the vicinity of the capacitor 26 and the inverter 25. The cooling device 27 is a device for cooling the swing electric motor 24, the capacitor 26, and the inverter 25. For example, a water-cooled cooling device is used.

  Next, a support structure that supports the drive unit 30 will be described. The support structure supports the drive unit 30 between the body frame 35 and the drive unit 30. As shown in FIG. 2, the support structure supports the drive unit 30 so that the central axis C1 passing through the input shaft of the generator motor 23 and the output shaft of the engine 21 described above is horizontal. Hereinafter, this state is referred to as a “normal state”. The support structure includes a first support part 31, a second support part 32, a third support part 33, a fourth support part 34, a first auxiliary support part 36, and a second auxiliary support part 37.

  The first support portion 31 and the third support portion 33 are attached to the first main beam 41 and the generator motor 23 and support the generator motor 23. The first support portion 31 is disposed on the rear side of the generator motor 23. As shown in FIG. 5, the first support portion 31 includes a first lower bracket 51, a first upper bracket 52, a first elastic member 53, and a first holding mechanism 54. 5 is a cross-sectional view taken along line VV in FIG.

  The first lower bracket 51 includes a first arm member 51a and a first base portion 51b. As shown in FIG. 2, one end of the first arm member 51 a is fixed to the side surface of the first main beam 41, and the other end of the first arm member 51 a is on the right side of the first main beam 41. Is located. The first arm member 51 a extends in the vehicle width direction from the side surface of the first main beam 41. The first base 51b is provided at the tip of the first arm member 51a. The upper surface of the first base part 51b has a flat shape and is arranged horizontally. Further, the first base portion 51b is provided with a hole 51c into which a bolt 54a of the first holding mechanism 54 described later is inserted.

  The first upper bracket 52 has a first vertical portion 52a and a first horizontal portion 52b. The first vertical portion 52 a is a plate-like portion that extends along the side surface of the generator motor 23 generally along the vertical direction. The first vertical portion 52a is detachably fixed to the side surface of the generator motor 23 by a fixing means such as a bolt. The first horizontal portion 52b is a plate-like portion that extends from the first vertical portion 52a substantially along the horizontal direction. The first horizontal portion 52b is provided with a hole 52c penetrating in the vertical direction. A first elastic member 53 described later is inserted into the hole 52c. The lower end portion of the first vertical portion 52a protrudes downward from the lower surface of the first horizontal portion 52b. In a state where the first upper bracket 52 is fixed to the generator motor 23, the lower end portion of the first vertical portion 52a is disposed at a slight distance from the upper surface of the first base portion 51b. A reinforcing flange 52d is provided across the first vertical portion 52a and the first horizontal portion 52b.

  The first elastic member 53 is made of an elastic material such as rubber and supports a load from the generator motor 23. As described above, the first elastic member 53 is inserted into the hole 52c of the first horizontal portion 52b. The first elastic member 53 includes a first upper elastic body 53a and a first lower elastic body 53b. The first upper elastic body 53a and the first lower elastic body 53b are combined side by side in the vertical direction. The first upper elastic body 53a is disposed above the first horizontal portion 52b, and the lower part of the first upper elastic body 53a is inserted into the hole 52c from above. The first lower elastic body 53b is disposed below the first upper elastic body 53a. The first lower elastic body 53b is disposed below the first horizontal portion 52b, and the upper portion of the first lower elastic body 53b is inserted into the hole 52c from below. The first upper elastic body 53a and the first lower elastic body 53b are provided with holes 53c and 53d penetrating in the vertical direction, respectively.

  The first holding mechanism 54 holds the first elastic member 53 in a compressed state. The first holding mechanism 54 has a bolt 54a and a nut 54b. The bolt 54a is inserted from above into the hole 53c of the first upper elastic body 53a, the hole 53d of the first lower elastic body 53b, and the hole 51c of the first base 51b. The nut 54b is screwed to the bolt 54a below the first base portion 51b. The bolt 54a and the nut 54b are compressed vertically by sandwiching the first upper elastic body 53a and the first lower elastic body 53b via washers 53e and 53f. The lower elastic body 53b is integrated. Accordingly, the first support portion 31 is attached to the vehicle body frame 35 and the generator motor 23 in a state where the first elastic member 53 is compressed by the first holding mechanism 54.

  As shown in FIG. 3, the third support portion 33 is disposed on the front side of the generator motor 23. The third support part 33 has the same structure as the first support part 31. The third support portion 33 includes a third lower bracket 55, a third upper bracket 56, a third elastic member 57, and a third holding mechanism 58. The third lower bracket 55, the third upper bracket 56, the third elastic member 57, and the third holding mechanism 58 are the first lower bracket 51, the first upper bracket 52, the first elastic member 53, and the first holding mechanism 54. Each has the same structure. The third elastic member 57 includes a third upper elastic body 57a and a third lower elastic body (not shown).

  The second support part 32 and the fourth support part 34 are attached to the second main beam 42 and the engine 21 and support the engine 21. The second support portion 32 is disposed on the rear side of the engine 21. As shown in FIG. 6, the second support portion 32 includes a second lower bracket 61, a second upper bracket 62, a second elastic member 63, and a second holding mechanism 64. The second lower bracket 61, the second upper bracket 62, the second elastic member 63, and the second holding mechanism 64 include the first lower bracket 51, the first upper bracket 52, the first elastic member 53, and the second holding mechanism 64 described above. The configuration is similar to that of the first holding mechanism 54, and a description thereof will be omitted.

  The fourth support portion 34 is disposed on the front side of the engine 21. The fourth support part 34 has the same structure as the second support part 32. As shown in FIG. 3, the fourth support portion 34 includes a fourth lower bracket 65, a fourth upper bracket 66, a fourth elastic member 67, and a fourth holding mechanism 68. The fourth lower bracket 65, the fourth upper bracket 66, the fourth elastic member 67, and the fourth holding mechanism 68 are the second lower bracket 61, the second upper bracket 62, the second elastic member 63, and the second holding mechanism. The configuration is the same as 64.

  The first auxiliary support portion 36 and the second auxiliary support portion 37 are attached to the flange portion 21 c at the time of removing and attaching the generator motor 23, and the engine 21 is operated together with the second support portion 32 and the fourth support portion 34. To support.

  As shown in FIGS. 3 and 7, the first auxiliary support portion 36 is attached to the left side surface of the flange portion 21 c and is disposed on the rear side of the engine 21. 7 is a sectional view taken along line VII-VII in FIG. The first auxiliary support portion 36 is disposed between the first support portion 31 and the second support portion 32 in the vehicle width direction. The first auxiliary support part 36 is located above the first main beam 41. The first auxiliary support portion 36 is located behind the oil pan 21b. As shown in FIG. 8, the first auxiliary support portion 36 includes a first fixed portion 73 and a first movable portion 74.

  The first fixed portion 73 has a vertical portion 73a and a horizontal portion 73b. The vertical portion 73a is a plate-like portion that extends substantially in the vertical direction along the side surface of the flange portion 21c. The vertical portion 73a is fixed to the side surface of the flange portion 21c by fixing means such as a bolt. The horizontal part 73b is connected to the lower end part of the vertical part 73a, and is a plate-like part provided substantially along the horizontal direction. The horizontal portion 73b is provided with a hole 73c into which the first movable portion 74 is inserted. Moreover, the 1st nut 75 is being fixed to the upper surface of the horizontal part 73b. The first nut 75 is disposed so that the hole of the first nut 75 coincides with the hole 73c of the horizontal portion 73b. A reinforcing flange 73d is provided across the vertical portion 73a and the horizontal portion 73b.

  The first movable part 74 is a member for adjusting the support height of the engine 21 with respect to the vehicle body frame 35 by the first auxiliary support part 36. The 1st movable part 74 is comprised with the volt | bolt which can be screwed together in the 1st nut 75 mentioned above. The first movable portion 74 is inserted from above into the first nut 75 and the hole 73c of the horizontal portion 73b. The first movable portion 74 is provided so as to be movable with respect to the first fixed portion 73 so as to approach and separate from the upper surface of the first main beam 41. That is, when the operator rotates the first movable portion 74 using a tool, the first movable portion 74 moves with respect to the first fixed portion 73. At this time, when the first movable portion 74 rotates in a direction screwed into the first nut 75, the first movable portion 74 moves downward with respect to the first fixed portion 73. Thereby, the tip of the first movable portion 74 moves so as to be close to the upper surface of the first main beam 41. Further, when the first movable portion 74 is rotated in the direction opposite to the above, the first movable portion 74 moves upward with respect to the first fixed portion 73. Thereby, the tip of the first movable part 74 moves so as to be separated from the upper surface of the first main beam 41.

  Here, the attachment position of the first auxiliary support portion 36 to the flange portion 21 c is a state in which the drive unit 30 is supported by the first support portion 31 to the fourth support portion 34, and the first auxiliary support portion 36. Is attached to the flange portion 21c so that the lower surface of the horizontal portion 73b is positioned at the same height as the upper surface of the first main beam 41. Therefore, in a state where the first movable portion 74 does not protrude downward from the lower surface of the horizontal portion 73b, the first support portion 31 is in the reference state as shown in FIG. In the reference state, the lower surface of the horizontal portion 73 b is in contact with the upper surface of the first main beam 41. That is, the reference state is a state where the support height of the engine 21 by the first auxiliary support portion 36 matches the support height of the engine in the normal state. In this reference state, the load from the drive unit 30 is mainly supported by the first support part 31 to the fourth support part 34, and the first auxiliary support part 36 is not loaded or a slight load is applied. Only the load is applied. When the first movable portion 74 is rotated so as to be screwed into the first nut 75 from the reference state, the tip of the first movable portion 74 protrudes downward from the lower surface of the horizontal portion 73b as shown in FIG. 8B. The upper surface of the first main beam 41 is pressed. At this time, the first auxiliary support portion 36 is in contact with the engine 21 and the upper surface of the first main beam 41 to support the engine 21. Hereinafter, this state is referred to as a “supported state”. This also increases the support height of the engine 21. As described above, the first movable portion 74 adjusts the amount of movement of the first movable portion 74 relative to the first fixed portion 73, that is, the amount of protrusion of the first movable portion 74 from the lower surface of the horizontal portion 73b, thereby adjusting the engine 21. The support height can be adjusted.

  As shown in FIGS. 3 and 7, the second auxiliary support portion 37 is attached to the left side surface of the flange portion 21 c and is disposed on the front side of the engine 21. As shown in FIG. 3, the second auxiliary support portion 37 is disposed between the third support portion 33 and the fourth support portion 34 in the vehicle width direction. The second auxiliary support part 37 is located above the first main beam 41. Further, the second auxiliary support portion 37 is located in front of the oil pan 21b.

  As shown in FIG. 7, the second auxiliary support portion 37 includes a second fixed portion 71 and a second movable portion 72. The 2nd fixing | fixed part 71 has the vertical part 71a and the horizontal part 71b. The vertical portion 71a is a plate-like portion that extends substantially in the vertical direction along the side surface of the flange portion 21c. The vertical portion 71a is fixed to the side surface of the flange portion 21c by fixing means such as a bolt. The horizontal part 71b is connected to the lower end part of the vertical part 71a, and is a plate-like part provided substantially along the horizontal direction. However, since the upper surface of the front portion of the first main beam 41 is inclined as described above, the horizontal portion 71 b is inclined in accordance with the inclination of the first main beam 41. The horizontal portion 71b is provided with a hole (not shown) into which the second movable portion 72 is inserted. A second nut 76 is fixed to the upper surface of the horizontal portion 71b. A reinforcing flange 71d is provided across the vertical portion 71a and the horizontal portion 71b.

The second movable portion 72 is a member for adjusting the support height of the engine 21 with respect to the vehicle body frame 35 by the second auxiliary support portion 37. The second movable portion 72 is configured by a bolt that can be screwed into the second nut 76. The mechanism for adjusting the support height of the engine 21 by the second movable portion 72 is the same as that of the first movable portion 74.
<How to remove the generator motor 23>
Next, a method for removing the generator motor 23 will be described with reference to FIG.

  First, as shown in FIG. 9A, the first auxiliary support portion 36 is attached to the flange portion 21c. Further, although not shown in FIG. 9A, the second auxiliary support portion 37 is also attached to the flange portion 21c. At this time, the first auxiliary support part 36 and the second auxiliary support part 37 are in the reference state shown in FIG. In FIG. 9A, the hydraulic pump 22 is removed from the drive unit 30.

  Next, the holding of the first elastic member 53 and the third elastic member 57 is released (see FIG. 3). Here, in the first support portion 31, the bolt 54a of the first holding mechanism 54 is loosened, and the compression holding of the first elastic member 53 by the first holding mechanism 54 is released. Also in the third support portion 33, the bolt of the third holding mechanism 58 is loosened, and the compression holding of the third elastic member 57 by the third holding mechanism 58 is released. As a result, as shown in FIG. 9B, due to the expansion of the first elastic member 53 and the third elastic member 57, the engine 21 and the generator motor 23 have the generator motor 23 side above the engine 21 side. It is in a state of being tilted so as to be positioned.

  Next, the first upper elastic body 53a of the first elastic member 53 is removed from the first support portion 31 (see FIG. 9B). Further, the third upper elastic body 57 a of the third elastic member 57 is detached from the third support portion 33.

  Next, the support height of the engine 21 is adjusted. Here, the 1st auxiliary | assistant support part 36 is made into the support state shown in FIG.8 (b). Then, the support height of the engine 21 is adjusted by the first movable portion 74 and the second movable portion 72. Here, the first movable portion 74 is arranged so that the support height of the engine 21 is increased to the extent that the first lower elastic body 53b can be extracted from between the first upper bracket 52 and the first lower bracket 51. The screwing amount is adjusted. In addition, the second movable body so that the third lower elastic body (not shown) can be pulled out from between the third upper bracket 56 and the third lower bracket 55 so that the support height of the engine 21 is increased. The screwing amount of the portion 72 (see FIG. 7) is adjusted.

  Next, the first lower elastic body 53b and the third lower elastic body (not shown) are removed. Here, the 1st lower elastic body 53b is extracted from between the 1st upper bracket 52 and the 1st lower bracket 51, and is removed from the 1st support part 31 (refer FIG.9 (c)). Further, the third lower elastic body is extracted from between the third upper bracket 56 and the third lower bracket 55 and is detached from the third support portion 33.

  Next, the support height of the engine 21 is returned to the normal state. Here, the 1st auxiliary | assistant support part 36 is returned to the reference | standard state shown to Fig.8 (a) by rotating the 1st movable part 74 in the reverse direction. As a result, as shown in FIG. 9C, the engine 21 and the generator-motor 23 return to the state before the first elastic member 53 and the third elastic member 57 are released. That is, the posture returns to the same posture as in the normal state, and the axis C1 between the engine 21 and the generator motor 23 becomes horizontal.

Then, as shown in FIG. 9D, the generator motor 23 is removed from the engine 21. At this time, the generator motor 23 is first moved in the horizontal direction by the crane and then lifted upward.
<Features>
In the hydraulic excavator 100, the generator motor 23 can be removed without supporting the engine 21 by the crane as described above. For this reason, the generator motor 23 can be easily removed. Moreover, the 1st auxiliary | assistant support part 36 and the 2nd auxiliary | assistant support part 37 are provided instead of increasing the support part similar to the 1st support part 31-the 4th support part 34. As shown in FIG. The 1st auxiliary support part 36 and the 2nd auxiliary support part 37 should just function at the time of removal of the generator motor 23, and do not need to function at the time of normal use. For this reason, compared with the 1st support part 31-the 4th support part 34, it can be set as a simple structure. For this reason, the increase in manufacturing cost can be suppressed.

  Further, when the vehicle body is tilted such that the generator motor 23 side is positioned above the engine 21 side, it is difficult to remove the generator motor 23. For this reason, before removing the generator motor 23 from the engine 21, it is necessary to remove the first lower elastic body 53 b and the third lower elastic body from the first support portion 31 and the third support portion 33. However, it is difficult to remove the first lower elastic body 53b and the third lower elastic body in a state where the loads of the engine 21 and the generator motor 23 are applied to the first lower elastic body 53b and the third lower elastic body.

  Therefore, in the hydraulic excavator 100, the first auxiliary support portion 36 and the second auxiliary support portion 37 can adjust the support height of the engine 21 by the first movable portion 74 and the second movable portion 72. Thereby, the support height of the engine 21 can be increased so that the first lower elastic body 53b and the third lower elastic body can be extracted. Thereby, the 1st lower elastic body 53b and the 3rd lower elastic body can be easily removed from the 1st support part 31 and the 3rd support part 33. FIG.

Furthermore, even if the engine 21 and the generator motor 23 are inclined due to the expansion of the first elastic member 53 and the third elastic member 57, the first movable portion 74 and the second movable portion 72 cause the engine 21 to generate power. The machine motor 23 can be returned to the same posture as the normal mounting state. Thereby, the generator motor 23 can be easily removed from the engine 21.
<Other embodiments>
(A) The present invention may be applied to work vehicles other than hydraulic excavators.

  (B) The elastic member may be a member other than rubber. The elastic member may be integrally formed without being divided into upper and lower parts.

  (C) In the above embodiment, the four support parts of the first to fourth support parts 31-34 are provided, but the number of support parts is not limited to this. However, in order to reduce the manufacturing cost, it is preferable that the number of support portions is small.

  (D) The first auxiliary support part 36 and the second auxiliary support part 37 may be fixed to the vehicle body frame 35. For example, the first auxiliary support part 36 and the second auxiliary support part 37 may be fixed to the first main beam 41.

  (E) In the above-described embodiment, the first main beam 41 is disposed on the right side and the second main beam 42 is disposed on the left side.

  (F) The structures of the first auxiliary support part 36 and the second auxiliary support part 37 are not limited to those described above, and it is sufficient that the support height of the engine 21 can be adjusted. However, in order to reduce the manufacturing cost, it is desirable to have a simple structure as in the above embodiment.

  (G) The first auxiliary support part 36 and the second auxiliary support part 37 may be provided in the vehicle during normal use.

  (H) In the above embodiment, the state in which the first movable portion 74 does not protrude from the lower surface of the horizontal portion 73b is the reference state. However, a state in which the first movable portion 74 projects a predetermined amount from the lower surface of the horizontal portion 73b may be set as the reference state. In this case, when the first auxiliary support portion 36 is attached to the engine 21 in the normal state, the lower surface of the horizontal portion 73 b is positioned above the upper surface of the first main beam 41. Therefore, the first movable portion 74 is rotated to move the first movable portion 74 to a position where the lower end portion of the first movable portion 74 is in contact with the upper surface of the first main beam 41. Then, the state where the lower end portion of the first movable portion 74 is in contact with the upper surface of the first main beam 41 is set as a reference state, and the position of the first movable portion 74 with respect to the first fixed portion 73 is recorded. Also in such a case, after removing the first lower elastic body 53b, the support height of the engine 21 can be easily returned to the height in the normal state. The second movable part 72 is the same as the first movable part 74.

  INDUSTRIAL APPLICABILITY The present invention has an effect that a generator motor can be easily removed and an increase in manufacturing cost can be suppressed, and is useful as a work vehicle and a method for removing the generator motor from the work vehicle.

21 engine 23 generator motor 35 body frame 54 first holding mechanism 53 first elastic member 31 first support portion 32 second support portion 36 first auxiliary support portion 42 second main beam 41 first main beam 21a engine main body 21c flange Part 73 First fixed part 74 First movable part

Claims (5)

Engine,
A generator motor that is disposed on the side of the engine and is detachably attached to the engine, and performs power generation by the driving force of the engine and assists the output of the engine by electric energy stored at the time of power generation;
A vehicle body frame on which the engine and the generator motor are mounted;
An elastic member for supporting a load from the generator motor; and a holding mechanism for holding the elastic member in a compressed state. The body frame and the generator motor in a state in which the elastic member is compressed by the holding mechanism. A first support part attached to and supporting the generator motor;
A second support part attached to the vehicle body frame and the engine and supporting the engine;
An auxiliary support disposed between the first support part and the second support part, attached to the engine or the vehicle body frame to support the engine, and capable of adjusting a support height of the engine relative to the vehicle body frame. And
Work vehicle equipped with. The vehicle body frame has a first main beam and a second main beam that are arranged at a distance in the vehicle width direction and extend in the front-rear direction,
The second support portion is attached to the second main beam and the engine,
The auxiliary support portion supports the engine between the first main beam and the engine.
The work vehicle according to claim 1. The engine is provided between the first main beam and the second main beam in the vehicle width direction and over the first main beam to the outside of the first main beam; A flange portion disposed outside the first main beam and projecting downward from the engine body to which the generator motor is attached;
The auxiliary support portion is attached to the flange portion.
The work vehicle according to claim 2. The auxiliary support part includes a fixed part fixed to the flange part, and a movable part provided to be movable relative to the fixed part so as to approach and separate from the first main beam, Adjusting the support height of the engine relative to the body frame by adjusting the amount of movement of the movable part relative to the fixed part;
The work vehicle according to claim 3. An engine, a generator motor that is disposed on the side of the engine and is detachably attached to the engine, and that generates power by the driving force of the engine and assists the output of the engine by electric energy stored at the time of power generation; A vehicle body frame on which the engine and the generator / motor are mounted, an elastic member that supports a load from the generator / motor, and a holding mechanism that holds the elastic member in a compressed state. The elastic member is compressed to be attached to the body frame and the generator motor, and is attached to the first support portion for supporting the generator motor, the body frame and the engine, and supports the engine. And a second support part to remove the generator motor from the engine in a work vehicle comprising:
Releasing the holding of the elastic member by the holding mechanism;
An auxiliary support disposed between the first support part and the second support part, attached to the engine or the vehicle body frame to support the engine, and capable of adjusting a support height of the engine relative to the vehicle body frame. Adjusting a support height of the engine to a height at which the elastic member can be removed by a portion;
Removing the elastic member from the first support portion;
Returning the supporting height of the engine to the height before releasing the holding of the elastic member by the auxiliary supporting portion;
Removing the generator motor from the engine;
A method for removing a generator motor from a work vehicle.

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