JP3845291B2 - Idler pulley mounting structure - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an idler pulley mounting structure for guiding an endless belt that drives an auxiliary machine of an engine.
[0002]
[Prior art]
Automobile engines are equipped with auxiliary equipment such as cooling water pumps, AC generators, air conditioning compressors, pumps for power steering devices, etc., and are provided on driven pulleys and crankshafts provided on the rotating shafts of these auxiliary equipments. By winding the endless belt around the drive pulley, the auxiliary machine is driven via the endless belt by the driving force of the engine. At this time, an idler pulley for guiding the endless belt is provided in order to ensure a sufficient winding angle of the endless belt with respect to the driving pulley or the driven pulley to ensure transmission of the driving force (for example, Japanese Patent Laid-Open No. Hei 5- No. 5422).
[0003]
[Problems to be solved by the invention]
By the way, since the bending load acts on the attachment portion of the idler pulley due to the tension of the endless belt, it is necessary to sufficiently ensure the rigidity of the attachment portion in order to prevent the inclination of the idler pulley. When the idler pulley is directly supported by a strong engine block, it is relatively easy to secure rigidity. However, when the idler pulley is supported by an accessory mounting bracket attached to the engine block, the idler pulley There is a problem that the rigidity of the mounting portion tends to decrease.
[0004]
The present invention has been made in view of the above circumstances, and an object thereof is to increase the mounting rigidity of an idler pulley that guides an endless belt that drives an auxiliary machine of an engine.
[0005]
[Means for Solving the Problems]
In order to achieve the above object, according to the first aspect of the present invention, an idler pulley for guiding an endless belt for driving an accessory mounted on an accessory mounting bracket fixed to the engine body is provided. In the mounting structure for mounting on the bracket, a cylindrical case of the oil filter is integrally formed on the accessory mounting bracket, and a mounting boss is integrally formed on the end of the cylindrical case on the side of the accessory mounting bracket. An idler pulley is attached to the attachment boss .
[0006]
According to the above configuration, the cylindrical case of the oil filter is formed integrally with the auxiliary equipment mounting bracket, and the idler pulley mounting boss is attached to the end of the oil filter's highly rigid cylindrical case on the auxiliary equipment mounting bracket side. Since it is formed integrally, the attachment rigidity of the idler pulley is increased, and the inclination of the idler pulley due to the tension of the endless belt can be prevented.
[0007]
According to the invention described in claim 2, in addition to the configuration of claim 1, the mounting boss of the idler pulley and the mounting boss of the auxiliary machine formed integrally with the auxiliary machine mounting bracket are integrated with each other . It is connected.
[0008]
According to the above configuration, since the mounting boss of the idler pulley is integrally connected to the mounting boss of the auxiliary machine, the mounting boss of the idler pulley and the mounting boss of the auxiliary machine mutually reinforce each other, and the idler pulley mounting rigidity and the auxiliary Both the mounting rigidity of the machine can be increased.
[0009]
According to a third aspect of the present invention, in an idler pulley mounting structure for guiding an endless belt that drives an engine auxiliary machine, an idler pulley mounting boss is attached to a cylindrical case of an oil filter fixed to the engine body. formed integrally, and the attachment boss, characterized by being integrally connected to the drip preventing wall formed integrally with the cylindrical case.
[0010]
According to the above configuration, the idler pulley mounting boss is integrally formed with the cylindrical case of the oil filter fixed to the engine body, so that the idler pulley mounting rigidity is enhanced and the idler pulley is prevented from tilting due to the endless belt tension. can do. Further, the mounting boss of the idler pulley, because of the integrally connected to the drip preventing wall formed integrally with the cylindrical case of the oil filter, it is possible to receive the liquid dripping by dripping preventing wall for maintenance, yet by having the mounting boss of the idler pulley is integrally connected to the drip preventing wall of the filter case, to reinforce the attachment boss of the idler pulley is dripping preventing wall serves reinforcing ribs, further enhance it the mounting rigidity of the idler pulley Can do.
[0011]
According to the invention described in claim 4, the auxiliary equipment mounting bracket is formed with a reinforcing rib for integrally connecting a boss portion into which a bolt for fixing the bracket to the engine body is screwed and a mounting boss of the idler pulley. It is characterized by being.
[0012]
According to the above configuration, since the reinforcing rib for integrally connecting the boss portion into which the bolt for fixing the accessory mounting bracket to the engine body is screwed and the mounting boss of the idler pulley is formed on the accessory mounting bracket, the idler pulley The mounting rigidity can be further increased.
[0013]
Incidentally, the cylinder block 11 and the cylinder head 12 in the embodiment corresponds to the engine body of the present invention, the ac generator 1 9 in the embodiment corresponds to the auxiliary machine of the present invention.
[0014]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of the present invention will be described below based on the embodiments of the present invention shown in the accompanying drawings.
[0015]
1 to 8 show an embodiment of the present invention. FIG. 1 is a view of an automobile engine viewed in the axial direction of a crankshaft, FIG. 2 is a perspective view of an auxiliary drive system of the engine, and FIG. 4 is a front view of the accessory mounting bracket, FIG. 4 is a view taken in the direction of the arrow 4 in FIG. 3, FIG. 5 is a diagram showing a state where a part of the accessory is attached to the accessory mounting bracket, and FIG. FIG. 7 is a sectional view taken along line 7-7 in FIG. 5, and FIG. 8 is a sectional view taken along line 8-8 in FIG.
[0016]
As shown in FIG. 1, an in-line multi-cylinder engine E for an automobile includes a cylinder block 11, a cylinder head 12, a head cover 13, and an oil pan 14, and is attached to a shaft end of a crankshaft 15 protruding from the lower part of the cylinder block 11. A drive pulley 16 is provided. Reference sign BL represents a bonnet line.
[0017]
As is apparent from FIG. 2 as well, an accessory mounting bracket 17 is fixed to the side surface of the engine E on the intake side, and a cooling water pump 18 as an accessory and an AC generator are attached to the accessory mounting bracket 17. 19 is attached. An air conditioning compressor 20 as an auxiliary machine is attached to the side wall of the cylinder block 11 and the oil pan 14 adjacent to the lower side of the auxiliary machine mounting bracket 17, and adjacent to the upper side of the auxiliary machine mounting bracket 17. The power steering device pump 21 is attached to the side wall of the cylinder head 12.
[0018]
Further, the auxiliary machine mounting bracket 17 is provided with an auto tensioner 22 and an idler pulley 23, and an endless belt 24 that transmits the driving force of the crankshaft 15 to each of the auxiliary machines 18 to 21 is connected to the driving pulley of the crankshaft 15. 16, driven pulley 25 of air conditioning compressor 20, driven pulley 26 of cooling water pump 18, driven pulley 27 of AC generator 19, idler pulley 23, driven pulley 28 of power steering device pump 21, auto It is wound around a tensioner pulley 29 of the tensioner 22.
[0019]
Therefore, when the crankshaft 15 is rotated by the operation of the engine E, the endless belt 24 is driven by the rotation of the driving pulley 16 provided on the crankshaft 15, and the driven pulleys 25, 26, 27, and 28 around which the endless belt 24 is wound. The air conditioning compressor 20, the cooling water pump 18, the AC generator 19, and the power steering device pump 21 connected to are driven. At this time, the idler pulley 23 functions to increase the winding angle of the endless belt 24 around the driven pulley 27 of the AC generator 19 and the driven pulley 28 of the pump 21 for the power steering device, and the tensioner pulley 29 of the auto tensioner 22. Functions to apply an appropriate tension to the endless belt 24.
[0020]
3 and 4 show the accessory mounting bracket 17 as a single item. The accessory mounting bracket 17 is attached to the side surfaces of the cylinder block 11 and the cylinder head 12 with five bolts 31a to 31e. A pump chamber 32 that houses an impeller (not shown) of the cooling water pump 18 is formed on the front surface of the accessory mounting bracket 17, and a pump cover 33 (see FIG. 2) is attached to the mounting surface 32 a that surrounds the pump chamber 32. Seven bolt holes 35 for fixing with bolts 34 are formed. On the right side surface of the accessory mounting bracket 17, an arcuate recess 36 into which the AC generator 19 is fitted is formed. A total of three bolts 38a, 38b, 38c (FIGS. 5 and 6) are formed in one bolt hole 37 formed on the upper side of the recess 36 and two bolt holes 37, 37 formed on the lower side of the recess 36. The AC generator 19 is fastened with reference.
[0021]
A cylindrical auto tensioner accommodation hole 39 is formed above the attachment surface 32 a for fixing the pump cover 33 to the accessory mounting bracket 17, and the flat attachment surface 39 a formed around the auto tensioner accommodation hole 39 has 2 Bolt holes 40, 40 are formed.
[0022]
5 and FIG. 7, the auto tensioner 22 is shown as a columnar main body 41, a mounting flange 42 provided on the end surface of the main body 41, and a projection protruding from the end surface of the mounting flange 42. The arm 43 is urged in the rotation direction by a spring (not shown), and a tensioner pulley 29 is rotatably supported at the tip of the arm 43 via a ball bearing 44 and a bolt 30. The main body portion 41 of the auto tensioner 22 is fitted into the auto tensioner housing hole 39 of the accessory mounting bracket 17, and the mounting flange 42 is in contact with the flat mounting surface 39a of the mounting flange 42. The two bolt holes 45 are inserted into the two bolt holes 40 that pass through the two bolt holes 45 and 45 and open to the mounting surface 39a.
[0023]
In this way, the mounting surface 39a for mounting the auto tensioner 22 to the auxiliary device mounting bracket 17 is configured as a flat surface, and the flat mounting surface 42a of the mounting flange 42 of the auto tensioner 22 is brought into contact with the mounting surface 39a and fastened with bolts 46, 46. As a result, the machining becomes easier as compared with the case where the mounting surface 39a of the accessory mounting bracket 17 has a step, which can contribute to the reduction of the machining cost. Moreover, since the cylindrical main body portion 41 of the auto tensioner 22 is inserted into (inserted into) the cylindrical auto tensioner storage hole 39 of the accessory mounting bracket 17 and stored, the mounting rigidity of the auto tensioner 22 is secured. The auto tensioner 22 can be mounted in a compact manner by reducing the amount of protrusion of the auto tensioner 22 from the accessory mounting bracket 17. Moreover, since the auto tensioner housing hole 39 also acts as a mounting guide surface for the auto tensioner 22, the mounting workability is improved. In particular, if the auto tensioner housing hole 39 and the cylindrical main body 41 of the auto tensioner 22 have the same shape, the function as the mounting guide surface is further improved. When the cylindrical main body 41 of the auto tensioner 22 is fitted into the auto tensioner housing hole 39, the mounting rigidity of the auto tensioner 22 can be further improved.
[0024]
The oil filter 47 that can be provided in the accessory mounting bracket 17 includes a cylindrical case 48 formed integrally with the accessory mounting bracket 17, a filter element (not shown) housed therein, and a cylindrical case 48. And a cap 49 fitted into the upper end opening. The lower end portion of the cylindrical case 48 (that is , the end portion of the case 48 on the auxiliary device mounting bracket 17 side) is integrally connected to the outer peripheral portion of the auto tensioner housing hole 39 of the auxiliary device mounting bracket 17 to reinforce each other. ing.
[0025]
3 and 4 again, the outer periphery of the intermediate portion of the cylindrical case 48 is surrounded by a liquid dripping prevention wall 50 protruding like a flange, and the AC generator 19 is fixed to the liquid dripping prevention wall 50. The mounting boss 51 in which the bolt hole 35 is formed is connected integrally. The liquid dripping prevention wall 50 can receive the liquid dripped when the oil filter 47 is maintained, and has a function of preventing the liquid dripping prevention wall 50 from being caught by auxiliary equipment as other members. Further, the mounting boss 51 for fixing the alternator 19 and the mounting boss 52 for supporting the idler pulley 23 are screwed with bolts 31a for fixing the accessory mounting bracket 17 via the reinforcing ribs 56 extending in the axial direction of the oil filter 47. Connected to the boss portion 57.
[0026]
Thus, at the lower end portion of the cylindrical case 48 of the oil filter 47 (that is, the end portion of the case 48 on the auxiliary device mounting bracket 17 side), as shown in FIGS. 52 is integrally formed, and the mounting boss 51 and the dripping prevention wall 50 are integrally connected to the mounting boss 52 . And, this is the mounting boss 52 and bolt holes 53 are formed, the idler pulley 23 through a ball bearing 55 by a bolt 54 screwed into the bolt hole 53 is rotatably supported (see Figure 8).
[0027]
As described above, the idler pulley 23 is attached to the lower end of the cylindrical case 48 having a high rigidity of the oil filter 47 formed integrally with the accessory mounting bracket 17 (that is, the end of the case 48 on the accessory mounting bracket 17 side). Since the mounting boss 52 is integrally formed , the idler pulley 23 can be firmly supported by the mounting boss 52, and the inclination of the idler pulley 23 due to the tension of the endless belt 24 can be reliably prevented. Moreover, since the mounting boss 52 of the idler pulley 23 is integrally connected to the upper mounting boss 51 of the AC generator 19, both the mounting rigidity of the idler pulley 23 and the mounting rigidity of the AC generator 19 can be increased.
[0028]
The mounting boss 52 of the idler pulley 23 is not only integrally connected (directly connected) to the liquid dripping prevention wall 50 of the cylindrical case 48 of the oil filter 47 but also the auto tensioner housing hole 39 through the liquid dripping prevention wall 50. Is connected to the boss portion 57 (see FIG. 3) for fastening the accessory mounting bracket 17 to the cylinder block 11 via the reinforcing rib 56, and the mounting rigidity of the idler pulley 23 is extremely high. It will be a thing.
[0029]
Further, since the accessory mounting bracket 17 is fixed across the cylinder block 11 and the cylinder head 12, the mounting rigidity is improved, and the idler pulley 23 and the tensioner pulley 29 fixed to the accessory mounting bracket 17. Can also be firmly fixed. Further, by lowering the position of the accessory mounting bracket 17 downward and attaching it only to the cylinder block 11, the accessory mounting bracket 17 can be compactly attached in the height direction, and the engine E is stored compactly in the engine room. be able to.
[0030]
As mentioned above, although the Example of this invention was explained in full detail, this invention can perform a various design change in the range which does not deviate from the summary.
[0031]
For example, in the embodiment, the oil filter 47 is provided on the accessory mounting bracket 17 that is fixed to the cylinder block 11 and the cylinder head 12, but the oil filter 17 may be directly fixed to the cylinder block 11 or the cylinder head 12.
[0032]
Since the tensioner pulley of the auto tensioner is also a kind of idler pulley, the idler pulley of the present invention includes the tensioner pulley.
[0033]
【The invention's effect】
As described above, according to the first aspect of the present invention, the cylindrical case of the oil filter is formed integrally with the accessory mounting bracket, and the end of the cylindrical case having the high rigidity of the oil filter on the accessory mounting bracket side. Since the mounting boss is formed integrally with the mounting boss and the idler pulley is mounted on the mounting boss, the mounting rigidity of the idler pulley is increased, and the inclination of the idler pulley due to the tension of the endless belt can be prevented.
[0034]
According to the invention of claim 2 , since the mounting boss of the idler pulley is integrally connected to the mounting boss of the auxiliary machine, the mounting boss of the idler pulley and the mounting boss of the auxiliary machine mutually reinforce each other. Both the attachment rigidity and the attachment rigidity of the accessory can be increased.
[0035]
According to the invention of claim 3 , since the mounting boss of the idler pulley is integrally formed with the cylindrical case of the oil filter fixed to the engine body, the mounting rigidity of the idler pulley is enhanced, and the idler pulley due to the tension of the endless belt. Can be prevented. Also the attachment boss of the idler pulley, since the integrally connected to the drip preventing wall formed integrally with the cylindrical case of the oil filter, it is possible to receive the liquid dripping by dripping preventing wall for maintenance, yet by having the mounting boss of the idler pulley is integrally connected to the drip preventing wall of the filter case, to reinforce the attachment boss of the idler pulley is dripping preventing wall serves reinforcing ribs, further enhance it the mounting rigidity of the idler pulley Can do.
[0036]
In particular, according to the invention of claim 4, a reinforcing rib for integrally connecting the boss portion into which the bolt for fixing the accessory mounting bracket to the engine body is screwed and the mounting boss of the idler pulley is formed on the accessory mounting bracket. Therefore, the mounting rigidity of the idler pulley can be further increased.
[Brief description of the drawings]
1 is a view of an automobile engine as viewed in the axial direction of a crankshaft. FIG. 2 is a perspective view of an auxiliary drive system of the engine. FIG. 3 is a front view of an accessory mounting bracket. Arrow view [Fig. 5] Diagram showing a state in which a part of the auxiliary machine is mounted on the auxiliary machine mounting bracket [Fig. 6] Fig. 6 is a view in the direction of the arrow 6 [Fig. FIG. 8 is a cross-sectional view taken along line 8-8 in FIG.
E Engine 11 Cylinder block (Engine body)
12 Cylinder head (engine body)
18 Cooling water pump (auxiliary machine)
19 AC generator (auxiliary machine)
20 Air conditioning compressor (auxiliary machine)
21 Power steering device pump (auxiliary machine)
23 Idler pulley 24 Endless belt 47 Oil filter 48 Cylindrical case 50 Liquid dripping prevention wall 51 Mounting boss 52 Mounting boss
56 reinforcing ribs
57 boss

Claims (4)

The engine body (11, 12) for fixing the accessory mounting bracket (17) to the mounting is accessory to the idler pulley (23) for guiding the endless belt for driving (19) (24), auxiliary device mounting bracket (17 In the mounting structure for mounting to
A cylindrical case (48 ) of the oil filter (47) is formed integrally with the accessory mounting bracket (17), and a mounting boss is attached to the end of the cylindrical case (48) on the accessory mounting bracket (17) side. (52) is integrally formed, and an idler pulley (23) is attached to the attachment boss (52) . The mounting boss (52) of the idler pulley (23) and the mounting boss (51) of the auxiliary machine (19) formed integrally with the auxiliary machine mounting bracket (17) are integrally connected to each other. The structure for mounting an idler pulley according to claim 1. In the mounting structure of the idler pulley (23) for guiding the endless belt (24) that drives the auxiliary machines (18 to 21) of the engine (E),
Forming a mounting boss (52) of the idler pulley (23) integral with the cylindrical casing (48) of the oil filter fixed to the engine body (11, 12) (47), and the mounting boss (52), wherein characterized by being integrally connected to the cylindrical case (48) to the drip preventing wall formed integrally (50), the idler pulley mounting structure. The accessory mounting bracket (17) includes a boss portion (57) into which a bolt (31a) for fixing the bracket (17) to the engine body (11, 12) is screwed, and an attachment boss (52) of the idler pulley (23). The structure for attaching an idler pulley according to claim 1, 2 or 3, characterized in that a reinforcing rib (56) is integrally connected to each other.

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