Accessory mounting structure for engine

Abstract

The utility model provides an accessory mounting structure for an engine, which has high rigidity and is beneficial to light weight and miniaturization of an engine component. An accessory mounting structure for an engine includes an accessory unit block supporting an engine accessory, and the accessory unit block includes an upper portion, a middle portion, a lower portion, an upper side fixing protrusion, and a lower side fixing protrusion. The accessory unit block has an upper portion and a lower portion, the lower portion integrally has a water pump housing and a thermostat housing, an upper side fixing protrusion is formed at an upper portion of the upper portion of the accessory unit block, and a lower side fixing protrusion is formed at an end edge portion of the lower portion, in which the engine accessory is located directly above the water pump housing. A flat part formed on the upper surface of the water pump shell is adjacent to an engine accessory, a connecting pipe is arranged on the accessory unit block and extends from the lower side of the water pump shell outside the flat part, and at least one connecting pipe is connected to a circulation path in an engine.

Description

Technical Field

[0001] The utility model relates to an accessory mounting structure for an engine. Background Art

[0002] In recent years, in order to ensure access to more affordable, reliable, sustainable, and advanced energy for more people, research and development related to weight reduction that contributes to the efficiency of energy has been underway.

[0003] In the past, various structures for supporting accessories on an engine body have been proposed. Among them, accessories such as an alternator (alternator), a compressor, etc. are supported on an accessory mounting bracket (accessory unit block) attached to the side of the engine to mount the accessory to the engine body.

[0004] In the invention described in the prior art document, an accessory mounting structure is disclosed in which engine accessories are arranged compactly along the engine body to make the engine assembly small. However, in the invention described in the prior art document, since in the accessory unit block which is an accessory mounting structure, the connecting pipe connecting to the passage from the heater core is arranged upward, for the fixing surface in the accessory unit block for fixing the engine accessory, it is necessary to provide a hole for pressing the connecting pipe, so it is difficult to ensure the structural rigidity of the accessory unit block for fixing the engine accessory. And if the structural rigidity of the accessory unit block is to be further ensured, it may be disadvantageous for the compact arrangement or lightweight design between the engine accessory and the accessory unit block, and is disadvantageous for the miniaturization of the engine assembly.

[0005] This case aims to solve the above problems to achieve weight reduction. Moreover, it further contributes to the efficiency of energy.

[0006] [Prior Art Documents]

[0007] [Patent Documents]

[0008] [Patent Document 1] Japanese Patent Publication No. 5476357 Summary of the Utility Model

[0009] The utility model provides an accessory mounting structure for an engine, which has high rigidity and is beneficial to the weight reduction and miniaturization of the engine assembly.

[0010] The present utility model provides an accessory mounting structure for an engine, including an accessory unit block. The accessory unit block supports engine accessories and is attached to the side surface of an engine body of the engine. The accessory unit block includes: an upper portion having a flat shape extending along the side surface of the engine body; a middle portion extending in a curved shape from the lower portion of the upper portion in a direction away from the engine body; a lower portion extending downward from the middle portion and further away from the engine body. The lower portion integrally has a water pump housing and a thermostat housing; an upper fixing protrusion and a lower fixing protrusion. The upper fixing protrusion is formed on the upper portion of the upper portion of the accessory unit block, and the lower fixing protrusion is formed on the edge portion of the lower portion. The engine accessories are fixedly supported by fixing portions respectively fastened to the upper fixing protrusion and the lower fixing protrusion. Wherein the engine accessories are located directly above the water pump housing of the lower portion, a flat portion formed on the upper surface of the lower portion abuts against the engine accessories, and a connecting pipe is provided on the accessory unit block. The connecting pipe extends from the lower side of the lower portion other than the flat portion, and at least one connecting pipe is connected to a circulation passage in the engine.

[0011] In an embodiment of the present utility model, the connecting pipe is connected to a passage flowing through a heater core and / or a bypass passage of cooling water in the engine.

[0012] In an embodiment of the present utility model, the engine accessory is an alternator driven by a belt through the rotation of the engine.

[0013] Based on the above, in the accessory mounting structure for an engine of the present utility model, by arranging the connecting pipe connected to the circulation passage in the engine on the lower side of the lower portion of the accessory unit block, it is not necessary to provide holes for pressing the connecting pipe in the flat portion adjacent to the engine accessories, thereby improving the surface rigidity of the accessory unit block adjacent to the engine accessories. Thus, the surface rigidity between the upper fixing protrusion and the lower fixing protrusion can also be further improved, and further, the vibration of the engine accessories caused by engine vibration can be suppressed.

[0014] To make the above features and advantages of the present utility model more obvious and understandable, specific embodiments are hereinafter given and described in detail in conjunction with the accompanying drawings as follows. Description of the Drawings

[0015] Figure 1 is a perspective view of an engine provided with an accessory mounting structure according to an embodiment of the present utility model;

[0016] Figure 2 is a side view of the engine;

[0017] Figure 3 is a schematic diagram of the engine's cooling system;

[0018] Figure 4 and Figure 5 are respectively perspective views of the accessory unit block from different perspectives;

[0019] Figure 6 is an enlarged view of the lower part of the accessory unit block.

[0020] Explanation of reference numerals:

[0021] 1: Engine

[0022] 2: Engine block

[0023] 3: Cylinder block

[0024] 3f: Side

[0025] 4: Cylinder head

[0026] 4e: Water outlet

[0027] 5: Cylinder head cover

[0028] 6: Oil pan

[0029] 7: Chain cover

[0030] 8: Crankshaft

[0031] 8p: Drive pulley

[0032] 10: Alternator

[0033] 10p: Generator pulley

[0034] 15: Compressor

[0035] 15p: Compressor pulley

[0036] 16: Chain tensioner

[0037] 16p: Idler pulley

[0038] 17: Belt

[0039] 18: Radiator

[0040] 18i, 18e, 19i, 19e: Passages

[0041] 19: Heater core

[0042] 20: Water pump

[0043] 20p: Water pump pulley

[0044] 21: Pump drive shaft

[0045] 30: Thermostat

[0046] 30i: Bypass passage

[0047] 40: Accessory unit block

[0048] 40E: Recessed space

[0049] 41: Upper part

[0050] 41b: Upper side fixing protrusion

[0051] 42: Middle part

[0052] 43: Lower part

[0053] 43b: Lower side fixing protrusion

[0054] 43P: Water pump housing

[0055] 43T: Thermostat housing

[0056] 100: Accessory mounting structure

[0057] FM: Fastener

[0058] FL: Flat part

[0059] FX: Fixing part

[0060] PJ1, PJ2: Connecting pipes Detailed implementation manner

[0061] Figure 1 is a three - dimensional view of an engine provided with an accessory mounting structure according to an embodiment of the present utility model; Figure 2 is a side view of the engine; Figure 3 is a schematic diagram of the engine's cooling system; Figure 4 and Figure 5 are respectively three - dimensional views of the accessory unit block from different perspectives; Figure 6 is an enlarged view of the lower part of the accessory unit block. In this embodiment, the accessory mounting structure for the engine refers to a partial structure in the vehicle that supports engine accessories in the engine. In this specification, the front, rear, left, and right directions are determined based on the vehicle. The following will use Figures 1 to 6 to illustrate the specific structure of the accessory mounting structure 100 for the engine.

[0062] Please refer to Figure 1 and Figure 2, in the present embodiment, the engine 1 provided with the accessory mounting structure 100 according to the present utility model is a 4-stroke water-cooled internal combustion engine having four cylinders arranged in a straight line. The engine 1 is mounted on a vehicle, and the crankshaft 8 of the engine 1 is oriented in the left-right direction (vehicle width direction).

[0063] Specifically, as Figure 1 and Figure 2 show, in the present embodiment, the engine 1 has an engine main body 2. The engine main body 2 includes: a cylinder block 3, the cylinders of the cylinder block 3 being arranged in the vehicle width direction; a cylinder head 4, the cylinder head 4 being mounted above the cylinder block 3; a cylinder head cover 5, the cylinder head cover 5 being mounted above the cylinder head 4; and an oil pan 6, the oil pan 6 being provided below the cylinder block 3. A chain cover 7 is attached to the right sides of the cylinder block 3 and the cylinder head 4. And. In the present embodiment, the accessory mounting structure 100 for the engine 1 includes an accessory unit block 40 that supports engine accessories, and is attached to the side surface 3f of the cylinder block 3 of the engine main body 2 of the engine 1. In the present embodiment, the engine accessory is, for example, an alternator 10 that is belt-driven by the rotation of the engine. Further, in the present embodiment, the alternator 10 and the water pump 20 as engine accessories are arranged vertically on the side surface 3f of the cylinder block 3 of the engine main body 2 and are located at a position facing the right side portion of the engine main body 2.

[0064] On the other hand, as Figure 2 show, in the present embodiment, the crankshaft 8 extends to the right side of the engine main body 2 through the chain cover 7, and a drive pulley 8p is fixed to one end of the crankshaft 8 that penetrates the chain cover 7. A chain tensioner 16 is provided above the drive pulley 8p. The chain tensioner 16 has an idler pulley 16p supported at the free end of an arm, and the arm is actuated to swing.

[0065] As Figure 1 and Figure 2 show, in the present embodiment, the alternator 10 has a drive shaft protruding to the right, and a generator pulley 10p is fixed to the protruding end of the drive shaft. The water pump 20 has a pump drive shaft 21 protruding to the right, and a water pump pulley 20p is fixed to the protruding end of the pump drive shaft 21. The compressor 15 has a compressor drive shaft protruding to the right, and a compressor pulley 15p is fixed to the protruding end of the compressor drive shaft. These generator pulley 10p, water pump pulley 20p, and compressor pulley 15p are arranged in the same vertical plane, and the drive pulley 8p and the idler pulley 16p are arranged in the vertical plane. An endless belt 17 is wound around the drive pulley 8p, the idler pulley 16p, the generator pulley 10p, the water pump pulley 20p, and the compressor pulley 15p in sequence. When the drive pulley 8p rotates, the endless belt 17 is driven so that the alternator, the water pump 20, and the compressor 15 as engine accessories are driven to rotate integrally.

[0066] When the water pump 20 is operated, cooling water circulates through the cooling system in the engine 1 from the water pump 20, and the cooling system in the engine 1 will be briefly described with reference to Figure 3 the schematic diagram.

[0067] As Figure 3 shown, in this embodiment, the cooling water discharged from the water pump 20 first enters the cylinder block 3, the cooling water circulates through the water jacket in the cylinder block 3, and then enters the cylinder head 4. The cooling water circulates through the water jacket in the cylinder head 4, whereby heat exchange is performed between the cooling water and the cylinder block 3 and the cylinder head 4. The cooling water finally flows out through the water outlet 4e.

[0068] The passage 18i leading to the radiator 18 and the bypass passage 30i leading to the thermostat 30 extend from the water outlet 4e. The passage 18e leading to the thermostat 30 extends from the radiator 18.

[0069] The passage 19i leading to the heater core 19 of the air conditioner extends from the water outlet 4e. The passage 19e is arranged to connect the heater core 19 to the thermostat 30.

[0070] Moreover, in this embodiment, the thermostat 30 and the water pump 20 are assembled together in the accessory unit block 40, and the circulating cooling water flows into the water pump 20 from inside the thermostat 30.

[0071] As outlined above, in this embodiment, the cooling system in the engine 1 has a water circulation passage.

[0072] When the engine 1 is cooled, the thermostat 30 closes the passage 18e from the radiator 18 and opens the bypass passage 30i from the water outlet 4e, so that the cooling water does not circulate through the radiator 18 but only flows through the cylinder block 3 and the cylinder head 4 to promote warming of the engine 1.

[0073] When the engine 1 is warmed up, the thermostat 30 opens the passage 18e from the radiator 18 and closes the bypass passage 30i from the water outlet 4e, so that the cooling water whose heat has been removed by the radiator 18 flows through the cylinder block 3 and the cylinder head 4 to cool the cylinder block 3 and the cylinder head 4.

[0074] The cooling water flowing into the heater core 19 flows through the heater core 19 and the thermostat 30 and returns to the water pump 20, regardless of the operation of the thermostat 30. The cooling water flowing out of the heater core 19 continuously circulates into the water pump 20.

[0075] The alternator 10 as an engine accessory is supported on the cylinder block 3 via the accessory unit block 40 of the accessory mounting structure 100, where the water pump 20 and the thermostat 30 are assembled into the accessory unit block 40 of the accessory mounting structure 100.

[0076] The following will be combined with Figures 4 to 6Further describe the specific structure of the accessory unit block 40 of the accessory mounting structure 100.

[0077] As Figures 4 to 6 shown, in this embodiment, the accessory unit block 40 includes an upper portion 41, a middle portion 42, a lower portion 43, an upper fixing protrusion 41b, and a lower fixing protrusion 43b.

[0078] The upper portion 41 has a flat shape extending along the side surface 3f of the engine body 2.

[0079] The middle portion 42 extends in a curved shape from the lower part of the upper portion 41 in a direction away from the engine body 2. The lower portion 43 extends downward from the middle portion 42 and further away from the engine body 2. The lower portion 43 integrally has a water pump housing 43P that defines a water pump chamber and a thermostat housing 43T that surrounds the thermostat 30.

[0080] The upper fixing protrusion 41b is formed on the upper part of the upper portion 41 of the accessory unit block 40, and the lower fixing protrusion 43b is formed on the edge portion of the lower portion 43. The alternator 10, which is an engine accessory, is fixedly supported by fixing portions FX respectively fastened to the upper fixing protrusion 41b and the lower fixing protrusion 43b.

[0081] Thus, as Figure 4 With Figure 5 shown, in this embodiment, the alternator 10 can be fixedly mounted on the accessory unit block 40. The flat upper portion 41 of the accessory unit block 40 and the edge portion of the lower portion 43 of the accessory unit block 40 that extends away from the cylinder block 3 (engine body 2) cooperate to form a generally L-shaped configuration. The L-shaped configuration defines a recessed space 40E, and the alternator 10 is disposed in the recessed space 40E. For this purpose, the alternator 10 can be firmly mounted on the water pump 20 and the thermostat 30 of the components forming the lower portion 43 and also formed along the upper portion 41 of the accessory unit block 40, such that the alternator 10 is positioned as close as possible to the engine body 2. The accessory unit block 40 is then supported on the cylinder block 3 by fasteners FM of the upper fixing protrusion 41b and the lower fixing protrusion 43b. And, as Figure 5 shown, the portion of the lower fixing protrusion 43b facing the cylinder block 3 can be formed with a recess having a gap to facilitate weight reduction of the accessory unit block 40. Thus, the alternator 10, which is an engine accessory, can be compactly disposed on the cylinder block 3 of the engine body 2, thereby reducing the overall volume size of the entire engine 1.

[0082] And, as Figures 4 to 6As shown, in this embodiment, the engine accessory is located directly above the water pump housing 43P of the lower part 43. The flat part FL formed on the upper surface of the lower part 43 abuts against the alternator 10 which is an engine accessory. The accessory unit block 40 is provided with connecting pipes PJ1 and PJ2. The connecting pipes PJ1 and PJ2 extend from the lower side of the lower part 43 outside the flat part FL, and at least one of the connecting pipes PJ1 and PJ2 is connected to the circulation passage in the engine 1. Specifically, in this embodiment, a plurality of connecting pipes PJ1 and PJ2 are provided, which are arranged side by side in the front-rear direction and communicate with the inside of the thermostat housing 43T of the lower part 43. More specifically, in this embodiment, the connecting pipes PJ1 and PJ2 are connected to the passage 19e through which the heater core 19 flows and / or the bypass passage 30i of the cooling water in the engine 1. For example, in this embodiment, one of the connecting pipes PJ1 is connected to the passage 19e through which the heater core 19 flows, and the other connecting pipe PJ2 is connected to the bypass passage 30i of the cooling water in the engine 1.

[0083] In this way, by arranging the connecting pipes PJ1 and PJ2 connected to the circulation passage in the engine 1 on the lower side of the lower part 43 of the accessory unit block 40, it is not necessary to provide holes for pressing the connecting pipes PJ1 and PJ2 in the flat part FL adjacent to the alternator 10 which is an engine accessory, and the surface rigidity of the accessory unit block 40 adjacent to the engine accessory can be improved. Thus, the surface rigidity between the upper fixing protrusion 41b and the lower fixing protrusion 43b can also be further improved, and the vibration of the engine accessory caused by the vibration of the engine 1 can be suppressed.

[0084] Moreover, by arranging the connecting pipes PJ1 and PJ2 connected to the circulation passage in the engine 1 on the lower side of the lower part 43 of the accessory unit block 40, the assembly between the circulation passage in the engine 1 and the connecting pipes PJ1 and PJ2 can be easily carried out, and the assembly convenience is improved.

[0085] In summary, in the accessory mounting structure for an engine of the present utility model, by arranging the connecting pipes connected to the circulation passage in the engine on the lower side of the lower part of the accessory unit block, it is not necessary to provide holes for pressing the connecting pipes in the flat part adjacent to the engine accessory, and the surface rigidity of the accessory unit block adjacent to the engine accessory can be improved. Thus, the surface rigidity between the upper fixing protrusion and the lower fixing protrusion can also be further improved, and the vibration of the engine accessory caused by the vibration of the engine can be suppressed.

[0086] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements on some or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. An accessory mounting structure for an engine, characterized in that, Comprising an accessory unit block, the accessory unit block supporting engine accessories, attached to a side surface of an engine body of the engine, and the accessory unit block includes: An upper portion having a flat shape extending along the side surface of the engine body; A middle portion extending in a curved shape from a lower portion of the upper portion in a direction away from the engine body; A lower portion extending downward from the middle portion and further away from the engine body, the lower portion integrally having a water pump housing and a thermostat housing; and An upper side fixing protrusion and a lower side fixing protrusion, the upper side fixing protrusion formed on an upper portion of the upper portion of the accessory unit block, and the lower side fixing protrusion formed on an edge portion of the lower portion, and the engine accessory is fixedly supported by fixing portions respectively fastened to the upper side fixing protrusion and the lower side fixing protrusion, wherein The engine accessory is located directly above the water pump housing of the lower portion, A flat portion formed on an upper surface of the lower portion is adjacent to the engine accessory, and A connecting pipe is provided on the accessory unit block, the connecting pipe extending from a lower side of the lower portion other than the flat portion, and at least one of the connecting pipes is connected to a circulation passage in the engine.

2. The accessory mounting structure for an engine according to claim 1, wherein The connecting pipe is connected to a passage flowing through a heater core and / or a bypass passage of cooling water in the engine.

3. The accessory mounting structure for an engine according to claim 1 or 2, wherein The engine accessory is an alternator driven by a belt through rotation of the engine.

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