TW486546B - Engine oil pump assembly - Google Patents

Abstract

To enable the location of an oil pump and driven gear in a narrow transmission chamber even if a fitting hole provided in a bulkhead between a neighboring transmission chamber and an auxiliary chamber within a crankcase is of a smaller diameter than a driven gear coupled to a pump shaft. An oil pump 32 is attached to an inner wall of a transmission chamber 18 and is located in the transmission chamber together with a driven gear 48 coupled to a pump shaft 46 and of a larger diameter than the oil pump 32. A fitting hole 50 enabling detachment of the oil pump 32 from the side of the auxiliary chamber 19 is provided at a bulkhead 20 between the transmission chamber 18 and the auxiliary chamber 19. The pump shaft 46 can be withdrawn in one direction with respect to a housing 40 and pump rotor 41 of the oil pump 32 and with respect to the driven gear 48, the fitting hole 50 is formed with a smaller diameter than the driven gear 48, and movement in the axial direction of the pump shaft 46 is restricted by a cover 52 for closing the fitting hole 50.

Description

486546

The invention is described in detail. The technology to which jg Deng Ji belongs is related to the engine's oil mill dream-the side part forms the transmission room and the crankcase oil pump adjacent to the engine 2 is mounted in the aforementioned transmission room to the outside auxiliary room, Ann, Straight big table oil pump passive gear, and Guhong Yumiao; ^ i is driven by the drive gear driving this passive gear, & '^ Pa ^ ^ ^ ^ at r Yu Keshu transmission room and auxiliary engine room 2 The installation hole on the engine room side to perform the aforementioned oil pump loading and unloading operation is improved by using a solitary moon bean to lock the installation hole. 0 Prior Art Publication No. 6 1-63492

The oil pump device of this type of engine can be easily removed from the side of the auxiliary engine room, for example, as disclosed in Japanese practice, and is well known.占 Questions to be solved by the invention In this oil pump device, the oil pump and its drive system are installed in a narrow transmission room through open mounting holes. However, as the conventional device is contained in the above-mentioned bulletin, the oil pump and the passive gear are all installed from the side of the auxiliary engine room, so a mounting hole having a diameter larger than that of the passive gear is formed. However, if the diameter of the mounting hole becomes larger, the strength of the partition wall between the transmission room and the auxiliary engine room must be considered to make up for it. In view of this situation, Ben Laming was created by the author, whose purpose is to provide an oil pump device for the engine. Even if the diameter of the mounting hole in the partition wall of the transmission room and auxiliary engine room is smaller than that of the passive gear, it can be equipped with Set oil pump and passive gear in narrow transmission room. Problem solving

89107972.ptd Description of the five inventions (2) In order to achieve the above-mentioned purpose, the present invention-the side part forms a transmission room and adjoins this = # The feature is that the pump in the crank box of the engine is in the aforementioned transmission room i, at: outdoor auxiliary equipment The oil pump shaft is installed in the chamber, and its diameter is larger than that of the oil pump. The passive chamber is equipped with driving teeth connected to this oil pump and the passive gear. It is fixed to the crank shaft to drive the wall. The partition body between the auxiliary engine compartments locks the engine of this mounting hole: ": the mounting hole for loading and unloading operations" so that it can be centered relative to the aforementioned oil pump / pump clothing, and the aforementioned pump shaft is configured to be inserted, and the other side is The pump rotor and the aforesaid passive gear are drawn small, and the 'η: mounting hole is used to lock the diameter so that its diameter is larger than that of the aforesaid gear. According to this feature, t? The axial movement of the pump shaft is described. The first two are from the side of the auxiliary engine room 'into the room through the installation hole, so that it is adjacent to the oil pump, the passive gear is inserted into the transmission sequence and inserted into the drive shaft and the passive gear, the pump is continued and =: the installation hole; the diameter of the hole is smaller than the passive gear, Also the rotor '• this Moving gear in the pump: between; the strength of the oil pump in the narrow transmission room 'next door, · ;; light]: the diameter of the mounting holes can be hunted to ensure that the aforementioned sub-passages pass through the passive gear, fruit shell and fruit The axial movement of the rotor causes the structure to be simplified without the need for a special structure to prevent the pump shaft from being pulled out. In addition to the first feature, the second feature of the present invention is that the cover is provided with a rotatable support. According to the second feature, the bearing hole of the cover body and the bearing hole of the pump casing support the pump shaft on both sides of the passive gear together with the bearing hole of the pump casing, thereby strengthening its support, which can help oil

89107972.ptd Page 7 5 Description of the invention (3) The durability of the system is further improved. In addition to the first and second features, the third feature of the present invention is that it is disengaged. The auxiliary machine prevents the cover from being detached from the mounting hole according to this third feature. Therefore, the auxiliary machine A fixed to the auxiliary machine room is used to prevent the holding structure from being simplified. …, It is necessary to use a retaining member for the cover, which can be implemented in the following form. Example 1 illustrates the implementation of the present invention. Fig. 1 is a side view to which the present invention is applied. Fig. 2 is a rear side view of the car, and Fig. 2 is an FM. Line cross-sectional view, Figure 3 is 3 of Figure 2 q 仏 is 2-2 of Figure 1 ^ ^ Circle 3 ~ 3 cross-sectional view, Figure 4 is a plan view of Figure 3, Figure 5 #Figure 3 1ΐ R 妗 &,, 4 4 green section

CliD is a sectional view of line 5 of CN, Figure 6 is Figure 3 = Figure 'Figure 9 is an exploded perspective view of the crank shaft, Figure i is a stereo α of the cover body — Baixian, as shown in Figure 1, and Locomotive 1 is a Skoda type. In the frame 2 of the vehicle, the rearward movement of the rear wheel gauge P can be installed freely through the link 9 ′ Ji, and a buffer 3 is sandwiched between the power pack P and the frame 2. As shown in FIG. 2, the power pack P is composed of a water-cooled four-stroke engine 4 and a belt-type stepless speed changer 5 on the left side of the engine 4. The rear wheel Wr is located directly behind the engine 4 and is mounted on this stepless speed changer. 5 Rear end side. In FIGS. 2 to 4, the engine 4 is connected with a crank case 6, a cylinder block 7 disposed substantially horizontally in front of the crank case 6, and a cylinder attached to the cylinder block 7.

V. Description of the invention (4) ___ The head 8 is the engine body, which is housed and supported by the company. 2 The curved axis which is connected to the cylinder phase 7 of the cylinder block 7 is connected via the 11. The internal lifting piston of the π cylinder inner fork 7a is provided on the cylinder head 8 with a camshaft via a timing transmission, a well-known gate drive mechanism 74, a two-crank shaft ^ valve 72, and an exhaust valve 73 (see FIG. 4). The opening crankcase 6 is connected to the cylinder block 7 _ connected to the front half and the rear 63 and the rear half :: h half, and T, the right crank, and the neck, 10] 2 And the left half of these box halves 6a, 6b of the crankshaft 10. The aforementioned ^ 81, 152 is held by the active wheel M of the crankshaft 10 from the left crankshaft ′, 〇H 10e, the gearbox 17 is screwed to the crank Jl ^ the outer side of the extended journal on the crank case 6 is opposite to the stepless second lever 6: two sides. The transmission room of the timing transmission 13 彳, 之The right 钿 ° 卩 is equipped with the aforementioned 19, where the transmission room 18 and the auxiliary machine ”= the oil seal 21 on the outer surface of the auxiliary branch to 10. The wall 20 women's tightly attached crank shaft is shown in Figure 3 and Figure 5, in the auxiliary machine room 19 neutrons 22ε are provided by a plurality of bolts 23 (fu χ (auxiliary)) with a fixed number of protrusions 19a, and the rotor 2 = fastened to the complex projected on its inner wall. The right end of the shank shaft 10, Tateyama, and the lead plate 25 and the fan cover 26 are sequentially connected to the right side of the crank case 6, and the heat sink 28 for the leading part is installed on the right side, but the heat sink 28 and the generator 22 > A few feathers are isolated and used to cool the interior. This cooling fan; but the fan 27 is equipped in the wind cover 26 LU fine 4 bolts 24 and the rotor 22r is fastened to the curved

89107972.ptd No. 9 I 486546 V. Description of the invention (5) On the arbor 1 Q. As shown in FIGS. 3 and 4, an oil groove 29 is formed at the lower portion of the crank case 6, and the lubricating oil 30 stored therein passes through the oil filter 3 and is sucked into the oil pump 3 2, and the oil pump 32 is pressure-fed to the crank shaft 1. 〇, other engine parts. A cylindrical oil filter chamber 33 with an open front surface is formed at the lower part of the half part 6a of the Kobe box, and the aforementioned oil filter 31 in a cup shape is formed in the chamber 33, and a sealing member attached to the open end of the oil filter 31 is held 34 presses the spring 3 5 pressed against the inner wall of the chamber 33, and the cover 36 is screwed to the opening of the chamber 33. The oil filter chamber 33 is divided into a chemical purification chamber and an outer purification chamber by an oil filter 31, and is connected to an oil purification chamber and a suction chamber of an oil pump 32. It is equivalent to an unclean tank 29 inside the oil filter 31. The inlet oil path 37 is connected to the port 32i and communicates with the outlet oil path 38. The hood 36 is removed, and the oil feeder 3m is taken out: 'Let the oil tank 29 be wet out through the oil passage 33'. The cover 36 also serves as an oil drain bolt. The outside is discerned. In FIG. 7, the oil pump 32 is installed on the inner wall of the opposite side of the transmission. The person described the next wall 20 2 The rotor 41 and the pump cover connected to the open surface of the cymbal: dagger: the inside is provided with the aforementioned suction port 32 and the discharge port 1 present 42, and the pump cover 42 is placed inside the fruit cover 42 to produce a screw and, Nut shell and pump cover 42. I screw ^ 43 fastened to the aforementioned transmission weight Λ: Also, the fruit shaft 46 of the bearing hole 45 of the Beton pump shell 40 can be defended to 18 within: the joint rotor 41 Completely round dagger :: The protruding surface 48a of the moving gear 48 inserted and pulled out is fitted to the pump and connected to it. That is, as shown in FIG. Shaft, 486546 V. Description of the invention (6) The keyway 69 of the end face 48a of the wheel 48 is connected between the pump shaft 46 and the passive gear spoke 48. The passive overpass wheel 4 8 is in the middle of the aforementioned transmission palace. The gear 47 is driven at a low speed, and is fixed on the driving gear 47 of the crankshaft 10 to form the timing pump 32 as described above. It is also driven by the aforementioned next door 20, and the driving sprocket 49 is 13 at m. It is also straighter than the passive gear 48. It has a safety hole F 50, which can be self-assisted in the machine room 19. Through this safety f-shaped women's clothing hole 50 configuration industry, in particular, it is possible to load and unload the oil fruit 32. Operation 2 = Mounting hole 5 mentioned above. Here the cover body 52 — ## 甘 ^? 孔 51 Here, as shown in Fig. 10, a fan shape protruding radially from the peripheral edge of the end of the cover ^ I Φ i ^ It is flanged and from the outer end, thereby holding the inner surface of the supporter 223 pressed against the front oil of the pillar 55 to keep the present limb 52 in the predetermined position of the mounting hole 50. 58. Face Xu M2 " Oil tank 60 of the casing half body 6 & shape: the oil chamber on the outside of the ball bearing with 10 L crank shaft journal 10 L is connected to the left crank uranium shaft journal 10 Jl and the oil groove 59 on the peripheral surface is located in The body-connected hollow portion 62, the journal 〇] 1, the oil groove 61 of the crank arm 10w, the middle of the crank pin ιορ communicate with each other. Clothing = radial injection hole 63 of the handle pin I013, and the crank pin 1 〇P outer circumferential bearing 6 4 Γ "Open again and the above-mentioned greed, the outer peripheral surface of the crank pin 1 0 p through the hole 6 3 via a needle roller (see Fig. 4) supports the large end 1 2 of the aforementioned connecting rod 12 b. Chi Yang explained the structure of the above oil passage.

㈣546 V. Description of the invention (7) The outer side wall 65 of the stepless transmission 5 side of the crank case 6 is fitted to support the outer seat ring of the ball bearing 151 of the left crank journal 10 father, and the outer shaft part of the tightly connected journal The oil seal 6 6 of 1 0 e, by the above-mentioned outer wall 65 and the oil seal 6 6 area, divides the surface ball bearing 1 5! And the annular oil chamber 60 on the outer side. The left crank journal 10 is allowed to be larger in diameter than the journal outer shaft 4 1 〇e extending from it. Therefore, between the left crank journal 101 and the journal outer shaft 1 〇ε An annular section 67 is formed to face the aforementioned oil chamber 60. A pair of the aforementioned oil grooves extending from the above-mentioned section portion 67 to the root portion of the left crank journal 1 〇j 丨 is provided on the outer peripheral surface of the left crank journal 1 0j1, and the oil groove 59 uses the open end of the section 67 as an entrance . 1 Oil groove 5 9 was formed on the crankshaft 10 during casting. In order to make it easy to form, it can be seen from FIGS. 6 and 9 that the axis parallel to the left crank journal 10h is arranged on the opposite side; the left crank journal 1 〇] ·〗 The phase of the center of rotation is approximately 9 ° away from the crank pin. Two parts. Further, in the crank shaft 10, a circular concave surface 70 is formed on the outer side of the crank arm i0w on the same side as the left crank journal 丨 〇, and the annular side plate 71 surrounds the left crank journal 1〇] · ι. Press in the recess 70, and form a ring-shaped, flat oil groove 61 in the area f between the side plate 71 and the crank arm 10w. On the radially inner side of the oil groove 61, the outlet of the oil groove 59 is opened at the middle , The hollow 62 of the crank pin 10p opens. > As shown in FIG. 6, a second oil supply path 58 is provided in the aforementioned tank half 6 & cylinder block 7 and cylinder head 8 to diverge from the aforementioned oil supply path 58 and pass through this second oil supply path 58 ' The oil is supplied to the aforementioned gate valve transmission mechanism 74. Next, the function of this embodiment will be described. When installing the oil pump 32 and its drive system, first, combine the rear case half body 讣 page 12 89107972.ptd 486546 V. Description of the invention (8) In the front case half 6a, insert the oil pump 32 into the transmission room 18 and borrow from The auxiliary machine room 19 is inserted through the mounting hole 50 into the bolt 4 3 of the transmission room 18, and the oil pump 32 is installed at a predetermined position on the inner wall of the transmission room 18. Secondly, a large-diameter passive gear 48 is inserted into the transmission chamber 18 of the aforementioned casing half 6a so as to be adjacent to the oil pump 32. In addition, the pump shaft 46 provided with the joint pin 68 is inserted into the protruding surface 4 8 a of the driven gear 48 through the mounting hole 50 from the auxiliary machine room 19 side, and the bearing hole 4 5 and the pump rotor 4 of the pump housing 40 are sequentially inserted. At the same time, the connecting holes 4 4 of 1 are engaged with the joint pins 6 8 and the key grooves 6 9 of the above-mentioned protruding surfaces 4 8 a.

Finally, the cover 5 2 of the outer peripheral mounting sealing member 5 3 is fitted into the mounting hole 50 of the partition wall 20, and the bearing hole 51 is fitted to the outer end of the pump shaft 46, and at the same time, the flange 54 abuts the partition wall 20 Outside side. In this state, the elastic cover 56 is covered on the front end portion of the pillar 55 of the cover body 52. Even if the diameter of the mounting hole 50 in the next wall 20 is smaller than that of the passive gear, + it is easy to install the oil pump 32 on the inner wall of the narrow transmission chamber 丨 8: the fan gear 48 is on the pump shaft 46. Because the diameter is smaller than the passive gear 48 = Wan Hubu Because the strength of the partition wall 20 is low, it is extremely light-weight. Moreover, the cover 52 of the fitting installation hole 50 is used to insert the passive gear 48, the pump casing 40, and the pump rotor 41, and the bearing hole 51 is banged. Therefore, it is not necessary to prevent the pump shaft 46 from being pulled out, etc .; the axial color of the shaft 46 is simplified.

Since the bearing hole 51 of the cover 52 and the bearing of the pump housing 40 hold the fruit shaft 46 on both sides of the passive gear 4 8, the durability of the φ surname 32 is improved. /, 'Can help to fix the auxiliary engine room of Qu Lixiang b when the whole engine is assembled.

1

ς = the stator 2 2 of the generator 2 2 presses the inner end surface on the front end of the pillar 55 of the body 52 through the elastic cover 5 6, thereby the cover 52 is held against the abutment flange 54 on the outer side surface of the partition wall 20 The predetermined position eliminates the need for a dedicated holder such as a bolt, and the holding structure can be simplified. On the other hand, the driving gear 47 fixed to the crank is meshed with the driven gear 48 and the oil pump 32 can be driven. Since the driving gear 47 that rotates with the crankshaft 11 is driven to drive the driven gear 48 while the engine 4 is operating, the rotor 41 of the oil pump 32 is driven at an appropriate speed. The oil pump 32 thus acted in sucks the lubricating oil 30 of the oil tank 29 through the oil filter 31, and moves toward the oil supply path 58, the oil chamber 60, the oil groove 59, the hollow portion 62 of the crank pin 10, and the injection hole 6. 3 pressure feed, so it can be supported by the oil chamber 6 〇 Lubricated on the crank journal 10 0 Ball bearings 15 ι, and crank pin 1 〇 Lubricate its outer peripheral surface, needle bearings 64 and the large end i2b of the connecting rod 12 Inner peripheral surface. At this time, since the entrance of the aforementioned oil groove 59 is opened at the annular section portion 67 between the left crank journal 10 of the large diameter and the outer shaft portion 10e of the small diameter journal, the oil chamber 6〇 The lubricating oil will not resist centrifugal force, and can pass straight through the oil groove 5 9 to smoothly supply oil to the crank pin 10 MPa. In addition, the oil chamber 60, which can communicate with the ball bearing 15m outside, and the oil groove 61, which is outside the crank arm 丨 w, are formed with oil grooves 5 9 formed on the outer peripheral surface of the left crank journal 10 h for easy processing. In particular, in the case where the oil groove 59 is arranged parallel to the axis of the left crank journal 10L, it can be formed at the same time as the crank shaft 10 is cast, and no special groove processing step is required. Therefore, the crankshaft 10 can be improved Productivity and cost reduction. 、 Since the left crank journal 1 〇 the oil groove 59 on the outer peripheral surface is arranged relative to the left

89107972.ptd Page 14 486546

The center of rotation of the crank journal ο is set, so the piston 11 comes to the top dead center and a plane that is not orthogonal to the inner diameter 7a. Therefore, the oil applied to the left crank journal 1 〇 ^ becomes the left crank journal 1 〇ji is low. The present invention is not limited to the above embodiments, and various design changes are made. For example, in order to be able to use an electric motor or other auxiliary machinery to replace the invention, the phase deviation of the crank pin is about 90%. When the dead point is in place, the oil groove 5 9 is located near the large vertical chair '与 5 9 which can avoid the piston 11 with the steam cup, which can prevent the oil groove 5 9 from being made in a range that does not deviate from its purpose. 50 Remove the cover 52 and replace the stator 2 2 of the generator 22. a ... 丄, the explosion feature is not poor, the transmission chamber is formed on one side and the oil pump is installed on the inner wall of the transmission chamber adjacent to the crank case of the engine. Pump shaft, the diameter larger than the oil pump is equipped with the drive teeth that are connected to this oil pump to drive the passive gear =, back, and the next wall fastened to the crank shaft can be installed from the auxiliary engine room = Hour, ', Yu Ke The hole between the transmission room and the auxiliary machine room is closed by a cover. The mounting shaft of the oil pump loading and unloading operation is configured to be able to pull out and insert the aforementioned pump wheel relative to the aforementioned oil pump = oil pump device. =, The pump rotor and the passive gear mentioned above are small, by locking it == mounting hole, so that its diameter is larger than before, so even if the diameter of the pump shaft is set in the mounting hole provided in the cover, the oil pump is installed in a narrow The transmission room has small force gears and can also be easily moved: stand by, you can use the mounting holes :: gears connected to the pump sleeve to reduce weight. In addition, due to the strength of Cui Shu's next wall, it is not necessary to limit the axial movement of the pump shaft without preventing the pump shaft from being pulled out, so the structure can be simplified. 486546 V. Description of the invention (11) In addition, according to the second feature of the present invention, since the bearing hole for supporting the pump shaft is rotatably supported in the cover body, the bearing hole of the cover body and the bearing hole of the pump housing support the pump shaft together. On the two sides of the passive gear, strengthening its support can help improve the longevity of oil chestnuts. Furthermore, according to the third feature of the present invention, since the cover is prevented from detaching from the mounting hole by the auxiliary machine fixed to the auxiliary machine room, it is not necessary to provide a special holding member, and the cover can be prevented from detaching from the mounting hole. Further simplification of the structure is obtained. Explanation of component numbers P: Power pack Wr: Rear wheel 1: Locomotive 2: Frame 3: Rear bumper 4: Engine 5: Belt-type stepless transmission 6: Crank case 6a: Front case half 6b: Rear case Half body 7: Cylinder block 7 a: Inner diameter 8: Cylinder head 9: Connecting rod 1 0: Crank shaft

89107972.ptd Page 16 486546 V. Description of the invention (12) 1 0 e: outer side of the journal 1 0: left crank journal 1 0 j2: right crank journal 1 0 p: crank pin 1 0 w: crank arm 1 1: Piston 1 2: Connecting rod 1 2 b: Large end 1 3: Timing transmission 1 4: Camshaft 1: Ball bearing 1 52: Ball bearing 1 6: Drive pulley 17: Gearbox 1 8: Transmission room 19: Auxiliary machine room 19a: Projection surface 2 0: Next wall 2 1: Oil seal 22: Generator 22r: Rotor 22s: Stator 23: Bolt 24: Bolt

89107972.ptd Page 17 486546 V. Description of the invention (13) 2 5: Auxiliary engine compartment cover 2 6: Fan cover 2 7: Cooling fan 28: Engine cooling radiator 2 9: Oil tank 3 0: Lubricant 3 1: Oil filter 3 2: Oil pump 3 2 i: Suction port 3 2 〇: Discharge port 3 3: Oil filter chamber 34: Seal member 35: Retaining spring 3 6 .. Cover 3 7: Inlet oil path 3 8: Outlet oil Circuit 4 0: Pump housing 4 1: Pump rotor 42: Pump cover 43: Bolt 4 4: Connection hole 4 5: Bearing hole of the casing 4 6: Pump shaft 4 7: Drive gear

89107972.ptd Page 18 486546 V. Description of the invention (14) 48: Passive gear 48a: Projection 4 9: Drive key wheel 5 0: Mounting hole 5 1: Bearing hole of cover 52: Cover 53: Sealing member 5 4: Flange 55: Pillar 5 6: Elastic cover 5 8: Oil supply path 58 '· Oil supply path 5 9: Oil groove 6 0: Oil chamber 6 1: Oil groove 6 2: Hollow portion 6 3: Spray Oil hole 6 4: Ball bearing 6 5: Xibu side wall 6 6: Oil seal 6 7: Ring section 68: Joint pin 6 9: Key groove 7 0: Round concave surface

89107972.ptd Page 19 486546

89107972.ptd Page 20 486546 Brief description of drawings Figure 1 is a rear side view of a locomotive to which the present invention is applied. FIG. 2 is a sectional view taken along the line 2-2 in FIG. 1. FIG. Fig. 3 is a sectional view taken along the line 3-3 in Fig. 2. Fig. 4 is a sectional view taken along line 4-4 in Fig. 3. Fig. 5 is a sectional view taken along the line 5-5 in Fig. 3; FIG. 6 is a sectional view taken along the line 6-6 in FIG. 3. FIG. FIG. 7 is an enlarged view around the oil pump of FIG. 3. FIG. 8 is a sectional view taken along the line 8-8 in FIG. 7. FIG. Fig. 9 is an exploded perspective view of a crank shaft.

89107972.ptd Page 21

Claims (1)

486546 6. Scope of patent application 1. An engine oil pump device, which is formed on one side of the bow engine to form a transmission room (1 8) and () adjacent to this transmission room n (6) / women's clothing oil pump (32 ) On the inner wall of the aforementioned transmission room (18), in the moving room (1 8), a passive #wheel (48) connected to the oil pump (3 2), the transmission system (32), and ^ on the crank The driving gear (47) of shaft ⑴ 5 = (48) is provided in the aforementioned transmission room (M): C (20) of the auxiliary machine (to 32). The aforementioned oil pump configuration can be performed from the auxiliary machine room (19) side. It can be pulled out and inserted with respect to the nut shell i (41) of the aforementioned apricot (32) and the aforementioned passive gear (48), and the other (48,) mounting hole (50) 'makes its diameter smaller than the aforementioned passive gear (48) ) The cap (52) which locks it blocks the axial movement of the aforementioned pump shaft (46).沭 ^ The oil pump assembly of the engine in Item 1 of the second patent scope, in which the bearing hole m 3 of the front (50 ^ 5 is rotatably supported to support the aforementioned pump shaft (46)): Item 1 or 2 of the patent scope The oil pump assembly of the engine I, wherein the auxiliary machine (22) just described in the auxiliary machine room (19) prevents the aforementioned) from being detached from the aforementioned mounting hole (50).