Engine device

1. An engine device comprising:

a first case configured to remove particulate matters in an exhaust gas of an engine; and

a second case configured to remove nitrogen oxides in the exhaust gas of the engine; and

wherein the second case is connected to the first case via a urea mixing pipe, and

wherein the engine device comprises a plurality of support leg bodies which are connected to the engine and to a support base, and the first case and the second case are arranged on the support base, and

wherein the support base is fixed to the engine with a positioning body which is fixed to the support base and which is in surface contact with a flat gas outlet surface of an exhaust gas outlet pipe of the engine, and

wherein the exhaust gas outlet pipe of the engine is connected to an exhaust gas inlet pipe of the first case.

2. The engine device according to claim 1 , wherein a support frame body is provided for firmly fixing the first case and the second case, the support base is firmly and approximately horizontally fixed to an upper surface side of the engine via the plurality of support leg bodies, the support frame body is firmly fixed to the upper surface side of the support base, the first case and the second case are arranged on the upper surface side of the support base via the support frame body, and the urea mixing pipe is arranged between the first case and the second case on an upper face side of the first case and an upper face side of the second case.

3. The engine device according to claim 1 , wherein a vent hole is formed in the support base and wherein a lower surface side of the first case or the second case faces the vent hole, and an air passage is defined by the engine, the first case, the second case, the plurality of support leg bodies and the vent hole.

4. The engine device according to claim 2 , wherein an exhaust gas purification unit is formed by firmly and integrally fixing the first case and the second case via the support frame body, and the exhaust gas purification unit is detachably supported on the support base.

5. The engine device according to claim 1 , wherein an exhaust gas purification unit is formed by firmly and integrally fixing the first case and the second case via a support frame body, and the exhaust gas outlet pipe of the engine is used as a support member for the exhaust gas purification unit by connecting the exhaust gas inlet pipe of the first case to the exhaust gas outlet pipe of the engine.

6. The engine device according to claim 5 , wherein the plurality of support leg bodies comprise respective first ends, and wherein the first ends are connected to a lower surface side of the support base, and wherein the support base has a rectangular shape in a plan view, wherein the support base is arranged on an upper surface side of the engine via the plurality of support leg bodies, and the support frame body is firmly and detachably fixed to the upper surface side of the support base, wherein the upper surface side of the support base is approximately horizontal.

7. The engine device according to claim 6 , further comprising a cylinder head having a first cylinder end and a second cylinder end which are opposite longitudinal ends of the cylinder head, the cylinder head comprising a cylinder first side and a cylinder second side defined between the first cylinder end and the second cylinder end, wherein the plurality of support leg bodies comprise respective support leg second ends, and wherein the support leg second ends are connected to the cylinder head at three locations comprising an outer surface of the first cylinder end, a portion of the cylinder first side proximate the second cylinder end, and a portion of the cylinder second side proximate the second cylinder end, wherein the cylinder head has a rectangular shape in a plan view of the engine.

8. The engine device according to claim 6 , wherein a first part of the support base extends to an upper surface side of the exhaust gas outlet pipe of the engine with which the exhaust gas inlet pipe of the first case comes into contact, and wherein the first part of the support base is fastened to the exhaust gas outlet pipe.

9. The engine device according to claim 1 , wherein a side surface of the support base is fastened to a side surface of any one of the plurality of support leg bodies by being brought into contact therewith, and a lower surface of the support base is fastened to an upper surface of any other of the plurality of support leg bodies by being brought into contact therewith.

10. The engine device according to claim 1 , wherein the plurality of support leg bodies comprises a first support leg body, a second support leg body, and a third support leg body, and wherein the support base is provided on an upper surface side of the engine via at least the first, second, and third support leg bodies, and wherein a side wall inner surface of the support base is fastened to respective side surfaces of at least the first and the second support leg bodies by being brought into contact therewith, an upper surface of at least the third support body is fastened to a top wall lower surface of the support base by being brought into contact therewith, and wherein the third support body is spaced from the side wall inner surface of the support base.

11. The engine device according to claim 10 , wherein a fastening bolt is threadably attached to the third support leg body and the support base via the upper surface of the third support leg body, and a respective fastening bolt is threadably attached to respective of the first and second support leg bodies and the support base via the side surfaces of the first and second support leg bodies and the side wall inner surface of the support base.

12. The engine device according to claim 10 , wherein the support base is firmly fixed to the exhaust gas outlet pipe via bolts which are connected to an upper surface side of the exhaust gas outlet pipe of the engine.

13. The engine device according to claim 1 , wherein the support base comprises an upper surface side and the upper surface side defines a first plane and wherein a second plane which is parallel to the first plane intersects the first case and the second case and wherein the first case and the second case are closer to the engine than the urea mixing pipe.