JP7787802B2 - Flywheel housing and engine having the same - Google Patents

Description

The present invention relates to a flywheel housing that houses a flywheel connected to the output shaft of the engine, and an engine equipped with the flywheel housing.

A flywheel is connected to the crankshaft, one of the engine's output shafts, and contributes to the engine's smooth rotation. The flywheel is housed in a flywheel housing mounted in the engine block.

Patent Document 1 discloses an engine equipped with a flywheel housing, flywheel, and flywheel cover at the rear end of the engine. In this engine, the flywheel housing has a circular opening on its end face, which is covered by a flywheel cover. The flywheel housing houses a flywheel. The flywheel cover has a through-hole through which the rotational force of the engine is extracted.

JP 2013-076266 A

The flywheel housing is designed to cover the outside of the flywheel. Therefore, making the flywheel housing larger leads to an increase in the overall size of the engine. On the other hand, making the flywheel housing smaller reduces the gap between the flywheel housing and the flywheel, so it is desirable to avoid compromising workability during engine assembly and inspection. Furthermore, having the flywheel housing perform functions other than housing the flywheel is important in terms of saving space in the engine.

The present invention was made in consideration of the above circumstances, and aims to provide a flywheel housing and an engine equipped with a flywheel housing that can prevent the engine from becoming larger and improve workability.

A first aspect of the present invention is a flywheel housing that houses a flywheel connected to the output shaft of an engine, comprising: a main body portion that is located on the engine side of the flywheel and has a housing portion that houses the flywheel; and a cover portion that is located on the opposite side of the flywheel from the engine, is connected to the main body portion, and has an opening with an inner diameter smaller than the outer diameter of the flywheel. The main body portion has a support portion that is located on the upper part of the main body portion and supports other components, and the support portion has a base portion that extends upward from the upper part of the main body portion and a pedestal portion that is located on the base portion and extends toward the cover portion while avoiding the cover portion.

According to the first aspect of the present invention, the base portion of the support extends toward the cover portion while avoiding interference with the cover portion, ensuring sufficient base area.

A second aspect of the present invention is a flywheel housing according to the first aspect of the present invention, characterized in that the leading end of the base portion in the extension direction is located closer to the surface of the cover portion than the joint surface between the main body portion and the cover portion, and closer to the main body portion than the surface of the cover portion.

According to the second aspect of the present invention, the position of the tip of the base in the extension direction is closer to the surface of the cover than the joint surface between the main body and cover, and closer to the main body than the surface of the cover. This ensures that the base does not protrude beyond the surface of the cover, ensuring a sufficient base area.

A third aspect of the present invention is a flywheel housing according to the first or second aspect of the present invention, characterized in that the support portion has a reinforcing rib connected to at least the base portion.

According to the third aspect of the present invention, the base portion is reinforced by reinforcing ribs.

A fourth aspect of the present invention is a flywheel housing according to the third aspect of the present invention, characterized in that the reinforcing rib is inclined in a direction away from the lifting hook connected to the engine as it extends from the base portion toward the pedestal portion.

According to the fourth aspect of the present invention, the reinforcing ribs are inclined away from the lifting hook as they move from the base toward the pedestal, so the pedestal does not get in the way when hanging a lifting member on the lifting hook to lift the engine.

A fifth aspect of the present invention is a flywheel housing according to any one of the first to fourth aspects of the present invention, characterized in that, when viewed from above the engine, the engine and members connected to the engine are not positioned so as to overlap the upper surface of the base portion.

According to the fifth aspect of the present invention, the engine and components connected to the engine are not located above the base, which increases the degree of freedom in the connection positions of other components attached to the base.

A sixth aspect of the present invention is a flywheel housing according to any one of the first to fifth aspects of the present invention, characterized in that, when viewed from above the engine, the base portion is located at a position separated from a lifting hook connected to the engine.

According to the sixth aspect of the present invention, the base and the engine lifting hook are spaced apart, so the base does not get in the way when hanging a lifting member on the lifting hook to lift the engine.

A seventh aspect of the present invention is a flywheel housing according to any one of the first to sixth aspects of the present invention, characterized in that it includes two support portions, and when viewed from above the engine, the two support portions are located symmetrically with respect to the output shaft.

According to the seventh aspect of the present invention, when viewed from above the engine, two support parts are provided at positions symmetrical with respect to the output shaft, thereby effectively suppressing vibrations around the engine's output shaft.

The eighth aspect of the present invention is a flywheel housing according to any one of the first to seventh aspects of the present invention, characterized in that the support portion is positioned so as to overlap the output shaft when viewed from above the engine.

According to the eighth aspect of the present invention, the support portion is positioned so that it overlaps with the output shaft when viewed from above the engine, so that vibrations around the engine's output shaft can be effectively suppressed even with a single support portion.

A ninth aspect of the present invention is an engine equipped with a flywheel housing that houses a flywheel connected to the engine output shaft. The flywheel housing comprises: a main body portion located on the engine side of the flywheel and having a housing portion that houses the flywheel; and a cover portion located on the opposite side of the flywheel from the engine, connected to the main body portion, and having an opening with an inner diameter smaller than the outer diameter of the flywheel. The main body portion has a support portion located on the upper part of the main body portion that supports other members, and the support portion has a base portion extending upward from the upper part of the main body portion and a pedestal portion located on the base portion that extends toward the cover portion while avoiding the cover portion.

According to the ninth aspect of the present invention, the base portion of the support extends toward the cover portion while avoiding interference with the cover portion, ensuring sufficient base area.

The present invention provides a flywheel housing and an engine equipped with a flywheel housing that can prevent the engine from becoming too large and improve workability.

1 is a perspective view showing an engine equipped with a flywheel housing according to an embodiment of the present invention. FIG. 2 is an exploded perspective view of the flywheel housing according to the embodiment. FIG. 2 is a perspective view illustrating a cover portion. FIG. FIG. 2 is a perspective view (part 1) illustrating a part of the main body portion. FIG. 10 is a perspective view (part 2) illustrating a part of the main body portion. FIG. 2 is a perspective view illustrating a part of the cover portion. FIG. 2 is a cross-sectional view illustrating a portion of a flywheel housing. FIG. 10 is a perspective view illustrating a support portion provided on a flywheel housing. FIG. 10 is a side view illustrating a support portion provided on the flywheel housing.

Hereinafter, an embodiment of the present invention will be described with reference to the drawings.
The embodiments described below are preferred examples of the present invention, and therefore various technically preferable limitations are applied thereto, but the scope of the present invention is not limited to these aspects unless otherwise specified in the following description to the effect that the present invention is particularly limited. Furthermore, in each drawing, similar components are designated by the same reference numerals, and detailed descriptions thereof will be omitted as appropriate.

FIG. 1 is a perspective view showing an engine equipped with a flywheel housing according to an embodiment of the present invention.
The engine 1 shown in Fig. 1 is an internal combustion engine, such as an industrial diesel engine. The engine 1 is a multi-cylinder engine, such as a high-output turbocharged three-cylinder or four-cylinder engine. The engine 1 is mounted on industrial machinery, such as construction machinery or agricultural machinery. The engine 1 may also be combined with a drive rechargeable power supply battery and a drive electric motor to form a hybrid drive system.

Engine 1 includes a cylinder block 2, a cylinder head 3, a head cover 4, an oil pan 7, a blow-by gas treatment device 10, and a flywheel 20 housed in a flywheel housing 100. In this embodiment, the axial direction of the crankshaft 9, which is the output shaft of engine 1, is referred to as the X direction, one of the directions perpendicular to the X direction (the horizontal direction) is referred to as the Y direction, and the direction perpendicular to the X and Y directions (the vertical direction) is referred to as the Z direction. Furthermore, one of the X directions (front of engine 1) is referred to as X1, the other (rear of engine 1) as X2, one of the Y directions is referred to as Y1, the other as Y2, one of the Z directions (above engine 1) is referred to as Z1, and the other (below engine 1) as Z2.

The cylinder head 3 is mounted on top of the cylinder block 2. The head cover 4 is mounted on top of the cylinder head 3. The cylinder block 2 has an upper cylinder 5 and a lower crankcase 6. An oil pan 7 is located below the crankcase 6. A piston (not shown) is located inside the cylinder 5. A crankshaft 9 is located inside the crankcase 6. The piston is connected to the crankshaft 9 via a connecting rod (not shown).

The blow-by gas processing device 10 is located inside the head cover 4. The blow-by gas processing device 10 separates blow-by gas into oil and gas from which oil mist has been separated.

The flywheel 20 is connected to the rear end (the end on the X2 side) of the crankshaft 9, which is one of the output shafts of the engine 1. The flywheel 20 rotates together with the crankshaft 9, and the centrifugal force generated by this rotation smooths the rotation of the engine 1.

The flywheel housing 100, which houses the flywheel 20, is provided at the rear end (the end on the X2 side) of the cylinder block 2. The flywheel housing 100 has a main body 110 and a cover 120. The main body 110 has a housing portion 111 (see Figure 2) that houses the flywheel 20, and is fastened to the cylinder block 2, for example, with bolts. When the flywheel 20 is housed in the housing portion 111, the main body 110 is positioned to cover the cylinder block 2 side (X1 side) of the flywheel 20.

The cover part 120 is attached to the main body part 110 so as to face the main body part 110. The cover part 120 is attached to the X2 side of the main body part 110, for example, with bolts. By attaching the cover part 120 to the main body part 110, the cover part 120 is positioned to cover the side of the flywheel 20 opposite the cylinder block 2 (X2 side). An opening 125 (see Figure 2) is provided in the center of the cover part 120. The rotational force of the flywheel 20, i.e., the rotational force of the engine 1, is extracted to the outside through this opening 125.

FIG. 2 is an exploded perspective view of the flywheel housing according to this embodiment.
The flywheel housing 100 has a bowl-shaped main body 110 and an annular cover 120. An accommodating portion 111 for accommodating the flywheel 20 is provided inside the bowl-shaped main body 110. The inner diameter of the accommodating portion 111 is larger than the outer diameter of the flywheel 20. A hole 115 is provided in the center of the main body 110 (the center of the bottom of the bowl). When the main body 110 is attached to the cylinder block 2, the end of the crankshaft 9 is positioned in the center of the hole 115.

With the main body 110 attached to the rear end of the cylinder block 2, the flywheel 20 is connected to the crankshaft 9. The flywheel 20 is housed in the housing 111 and connected to the crankshaft 9 located in the hole 115. When connecting the flywheel 20 to the rear end of the crankshaft 9, the flywheel 20 may be fixed via a connecting member (e.g., a connecting flange) attached to the rear end of the crankshaft 9.

With the flywheel 20 attached to the housing portion 111 of the main body portion 110, the cover portion 120 is attached to the X2 side of the main body portion 110. The cover portion 120 is attached to the main body portion 110 so as to cover the housing portion 111 of the main body portion 110. Mounting holes 126 are provided in the peripheral portion of the annular cover portion 120, and the cover portion 120 is fastened to the main body portion 110 by bolts (not shown) through the mounting holes 126.

An opening 125 is provided in the center of the cover portion 120. The inner diameter of the opening 125 is smaller than the outer diameter of the flywheel 20. As a result, when the cover portion 120 is attached to the main body portion 110, the outer periphery of the flywheel 20 is covered by the cover portion 120. The center portion of the flywheel 20 can be accessed from the outside through the opening 125. Driven equipment that utilizes the rotational force of the engine 1 can obtain the rotational force of the flywheel 20 through the opening 125 in the cover portion 120.

(Configuration of the cover part)
Next, the configuration of the cover portion 120 of the flywheel housing 100 will be described.
3 is a perspective view illustrating the cover unit 120. In FIG. 3, the X1 side of the cover unit 120 is viewed in the X2 direction.
4 is a partial cross-sectional view of the cover taken along line AA in FIG.
The cover part 120 has an annular outer peripheral part 121 and an inner peripheral part 122 provided inside the outer peripheral part 121. The inner peripheral part 122 is the part between the outer peripheral part 121 and the opening 125. The outer peripheral part 121 has a plurality of mounting holes 126 provided at predetermined intervals. The inner peripheral part 122 has a protrusion 122a extending circumferentially. The protrusion 122a is used to align the center position when attaching the cover part 120 to the main body part 110.

A recess 123 that is recessed in a direction away from the flywheel is provided on the surface 122b of the inner circumferential portion 122 facing the flywheel 20. The bottom surface 123b of the recess 123 is recessed from the facing surface 122b toward the X2 side, creating a gap between the cover portion 120 and the flywheel 20 at the position of the recess 123. This gap ensures working space when accessing the flywheel 20 from the X2 side of the cover portion 120 through the opening 125.

For example, when the cover unit 120 is attached to the main body unit 110, if an operator wishes to clean the portion of the flywheel 20 covered by the cover unit 120 or the opposing surface 122b on the back side of the cover unit 120 through the opening 125, the operator can easily reach in using the gap formed by the recess 123. If the recess 123 were not provided, the gap between the cover unit 120 and the flywheel 20 would be narrow, making it difficult to reach in through the opening 125 between the back side of the cover unit 120 (the opposing surface 122b to the flywheel 20) and the flywheel 20. In this embodiment, the recess 123 forms a gap between the back side of the cover unit 120 and the flywheel 20, making it easier to reach in through the opening 125 and wipe this area with a rag or the like.

It is preferable to provide multiple recesses 123 on the opposing surface 122b of the cover part 120. The multiple recesses 123 are arranged along the edge 125a of the opening 125. This improves workability over a wide area of the opposing surface 122b of the cover part 120.

A rib 124 is provided between two adjacent recesses 123 among the multiple recesses 123. In other words, each of the multiple recesses 123 and each of the multiple ribs 124 are arranged alternately. Providing the recesses 123 reduces the thickness of the cover portion 120, but providing the rib 124 ensures the strength of the cover portion 120.

The recess 123 is positioned so that the edge 125a of the opening 125 is positioned on the bottom surface 123b of the recess 123. In other words, the recess 123 is positioned along the edge 125a of the opening 125. This means that the edge 125a of the opening 125 is continuous with the bottom surface 123b of the recess 123, and there is no wall on the side of the edge 125a of the recess 123. This allows easy access from the edge 125a of the opening 125 to the opposing surface 122b of the cover part 120.

Furthermore, when ribs 124 are provided between adjacent recesses 123, the tip 124a of the rib 124 in the extension direction is located at the edge 125a of the opening 125. By positioning the tip 124a of the rib 124 at the edge 125a of the opening 125, it becomes easier to access the recesses 123 along the rib 124 from the edge 125a of the opening 125.

It is preferable that a curved surface 123c be provided between the side surface 123s and the bottom surface 123b of the recess 123. It is also preferable that a curved surface 123d be provided between adjacent side surfaces 123s of the recess 123. In this way, the curved surfaces 123c and 123d are provided between the surfaces of the recess 123, making it easier for an operator to contact the entire surface of the recess 123 when inserting their hand into the recess 123. In other words, the corners between adjacent side surfaces 123s and between the side surface 123s and the bottom surface 123b have a relatively large R-surface, making it easier for the operator to contact the corners with their hand and reducing the risk of leaving any areas unwiped. Note that the recess 123 may be composed solely of a concave curved surface (a surface that does not include a flat surface).

Furthermore, as shown in FIG. 4, it is preferable that the area between the outer surface of the rib 124 and the bottom surface 123b of the recess 123 is curved. The outer surface of the rib 124 corresponds to part of the side surface 123s of the recess 123. In this embodiment, as shown in FIG. 4, the rib 124 has a mountain shape (e.g., normal distribution) that is symmetrical (line symmetrical with respect to the X direction) on a plane represented by the X and Z directions. By having a curved area between the outer surface of the rib 124 (i.e., part of the side surface 123s of the recess 123) and the bottom surface 123b of the recess 123, it becomes easier for an operator to come into contact with the surface of the rib 124 when inserting their hand into the recess 123.

It is preferable that the width of the rib 124 (the length in the Y direction in Figure 4) narrows in the extension direction (the direction from the X2 side to the X1 side in Figure 4). This ensures a sufficient width at the base of the rib 124 to provide a reinforcing effect, and the width of the recess 123 expands toward the edge 125a, making it easier to insert a hand into the recess 123 through the opening 125.

(Water drainage mechanism)
Next, a water drainage mechanism for the flywheel housing 100 will be described.
In the engine 1, sealing is required at the joints of components, such as between the cylinder block 2 and the cylinder head 3, and between the cylinder head 3 and the head cover 4. One method for inspecting sealing is a water immersion test. When inspecting the engine 1 by submerging it, the flywheel housing 100 is covered to prevent water from entering the flywheel housing 100. However, even with the cover, some water may enter the flywheel housing 100. After the water immersion test, this water must be drained from the flywheel housing 100. The flywheel housing 100 of this embodiment is provided with a drainage mechanism for draining such water.

Fig. 5 is a perspective view (part 1) illustrating a part of the main body 110. Fig. 5 shows a perspective view of the lower part of the X1 side of the main body 110 viewed obliquely upward.
6 is a perspective view (part 2) illustrating a part of the main body 110. In FIG. 6, a perspective view of the lower part of the X2 side of the main body 110 is shown obliquely from below.

In the flywheel housing 100, a first through-hole 117 is provided in the lower part of the accommodating section 111 of the main body 110. The first through-hole 117 is provided at the lowest position of the bowl-shaped accommodating section 111 of the main body 110, and opens downward. By providing the first through-hole 117 in the main body 110, water can be discharged from the accommodating section 111 to the outside through the first through-hole 117.

A step 118 is provided in the circumferential direction on the inner surface 111a of the storage section 111 in the main body 110. The step 118 is connected to the first through hole 117. That is, the first through hole 117 is located midway between the step portions 118 that are provided continuously in the circumferential direction. By providing the step 118, water adhering to the inner surface 111a of the storage section 111 is guided along the step 118 to the bottom of the inner surface 111a. The water guided to the bottom of the inner surface 111a is then discharged to the outside of the main body 110 via the first through hole 117 that is connected to the step 118. By providing the step 118, the water in the storage section 111 is guided along the step 118 along the inner surface 111a and efficiently led to the first through hole 117, where it is discharged to the outside.

7 is a perspective view illustrating a part of the cover unit 120. In FIG. 7, a perspective view of the X2 side of the cover unit 120 viewed in the X1 direction is shown.
In the flywheel housing 100, a second through hole 127 is provided in the inner circumferential portion 122 located below the opening 125 of the cover portion 120. The second through hole 127 is provided, for example, between the outer circumferential portion 121 and the inner circumferential portion 122 of the cover portion 120, penetrating from the back surface (X1 side) to the front surface (X2 side) of the cover portion 120. By providing the second through hole 127 in the lower portion of the cover portion 120, water can be discharged from the accommodation portion 111 to the outside through the second through hole 127.

Fig. 8 is a cross-sectional view of a part of the flywheel housing, showing a cross-section of the lower part of the flywheel housing (a cross-section taken in the Y2 direction).
When the cover part 120 is attached to the main body part 110 with the flywheel 20 accommodated in the accommodation part 111, the convex part 122a of the cover part 120 engages with the inner peripheral surface 111a of the main body part 110, and the cover part 120 is attached with the center position aligned.

A groove 119 is provided circumferentially on the inner surface 111a of the main body 110. In this embodiment, the groove 119 is formed between a wall 119a provided circumferentially on the inner surface 111a of the main body 110 and a protrusion 122a of the cover 120. In other words, the groove 119 is formed by attaching the cover 120 to the main body 110. The groove 119 is connected to the second through hole 127 of the cover 120. This allows water in the storage section 111 to enter the groove 119 and be guided to the second through hole 127, allowing the water to be efficiently discharged from the second through hole 127.

A tapered portion 119b may also be provided between the second through-hole 127 and the groove portion 119. By providing the tapered portion 119b, water guided by the groove portion 119 can more easily flow along the tapered portion 119b and into the second through-hole 127.

The second through hole 127 preferably has a gradually increasing portion 127a whose inner diameter gradually increases toward the surface of the cover portion 120 (from the X1 side toward the X2 side). The gradually increasing portion 127a may increase the inner diameter of the second through hole 127 in steps, or may increase continuously. Furthermore, the gradually increasing portion 127a may be provided so that the inner diameter increases symmetrically or asymmetrically with respect to the central axis of the second through hole 127. For example, the inner diameter of the second through hole 127 may increase more on the lower side (Z2 side) than on the upper side (Z1 side). This allows water introduced into the second through hole 127 to flow more easily in the direction of discharge via the gradually increasing portion 127a, thereby preventing water from flowing back.

(Structure of the support part)
Next, the structure of the support portion of the flywheel housing 100 will be described.
FIG. 9 is a perspective view illustrating a support portion provided on the flywheel housing.
Fig. 10 is a side view illustrating a support portion provided on the flywheel housing. Fig. 10 shows a side view of the upper part of the flywheel housing.
In the flywheel housing 100 according to this embodiment, a support portion 130 for supporting other members is provided on the upper portion of the main body portion 110. Examples of other members supported by the support portion 130 include a vibration suppression device (such as a vibration damper or an auxiliary bar) for the engine 1.

The support part 130 has a base part 131 that extends upward (towards the Z1 direction) from the top of the main body part 110, and a seat part 132 that is provided on top of the base part 131. The upper surface of the seat part 132 is a flat seat surface 132b, which is provided with, for example, a screw hole 132c. This screw hole 132c is used to secure other components to the support part 130.

The pedestal portion 132 is provided on the base portion 131, extending toward the cover portion 120 (X2 side) while avoiding the cover portion 120. In other words, the base portion 131 of the support portion 130 is provided facing upward toward the main body portion 110, while the pedestal portion 132 is provided extending from above the main body portion 110 toward the cover portion 120. This makes it possible to ensure a sufficient area for the pedestal surface 132b (pedestal area) while avoiding interference between the support portion 130 and the cover portion 120.

The tip 132a of the base portion 132 in the extension direction is located closer to the surface 120a of the cover portion 120 (X2 side) than the joint surface 135 between the main body portion 110 and the cover portion 120, and closer to the main body portion (X1 side) than the surface 120a of the cover portion 120 (see range L shown in Figure 10). This prevents the base portion 132 from protruding further toward the X2 side than the surface 120a of the cover portion 120, ensuring a sufficient base area.

The support portion 130 preferably has at least a reinforcing rib 133 connected to the base portion 131. In this embodiment, the reinforcing rib 133 is provided between the X1 side surface of the base portion 131 and the main body portion 110. This provides strength reinforcement to the base portion 131.

Furthermore, when viewed from above the engine 1, it is preferable that the engine 1 and the components connected to the engine 1 are not positioned so as to overlap the upper surface (base surface 132b) of the base portion 132. By not positioning the engine 1 or the components connected to the engine 1 above the base portion 132, there is greater freedom in the connection positions of other components attached to the base portion 132.

As an example, the cylinder head 3 of the engine 1 is provided with a lifting hook 31 (see Figure 1) used to lift the engine 1. When viewed from above the engine 1, the base 132 is located at a distance from the lifting hook 31 connected to the engine 1. This prevents the base 132 from getting in the way when hanging a lifting member on the lifting hook 31 to lift the engine 1. Furthermore, the reinforcing rib 133 is inclined in a direction away from the lifting hook 31 (i.e., in the X2 direction) as it moves from the base 131 toward the base 132 (i.e., from the Z2 side toward the Z1 side). This prevents the reinforcing rib 133 from getting in the way when hanging a lifting member on the lifting hook 31 to lift the engine 1. It is preferable that the engine 1 and any components connected to the engine 1, other than the lifting hook 31, not be placed above the base 132.

The main body 110 may be provided with one support part 130, or two or more. For example, when two support parts 130 are provided, the two support parts 130 are preferably provided at positions symmetrical with respect to the crankshaft 9, which is the output shaft, when viewed from above the engine 1. By providing the two support parts 130 at positions symmetrical with respect to the crankshaft 9, vibrations around the crankshaft 9 of the engine 1 (vibrations in the rotational direction centered on the crankshaft 9) can be effectively suppressed by attaching vibration damping devices to these support parts 130.

Furthermore, for example, if one support part 130 is provided, it is advisable to position the support part 130 so that it overlaps with the crankshaft 9 when viewed from above the engine 1. This makes it possible to effectively suppress vibrations around the crankshaft 9 of the engine 1 (vibrations in the rotational direction around the crankshaft 9), as described above.

According to this embodiment, it is possible to provide a flywheel housing 100 and an engine 1 equipped with the flywheel housing 100 that can prevent the engine 1 from becoming too large and improve workability.

The above describes an embodiment of the present invention. However, the present invention is not limited to the above embodiment, and various modifications can be made without departing from the scope of the claims. The configurations of the above embodiment can be partially omitted or arbitrarily combined in a different manner than described above.

1...engine, 2...cylinder block, 3...cylinder head, 4...head cover, 5...cylinder, 6...crankcase, 7...oil pan, 9...crankshaft, 10...blow-by gas treatment device, 20...flywheel, 31...lifting hook, 100...flywheel housing, 110...main body, 111...accommodation section, 111a...inner circumferential surface, 115...hole, 117...first through-hole, 118...step portion, 119...groove portion, 119a...wall portion, 119b...tapered portion, 120...cover portion, 120a...surface, 121...outer periphery, 122...inner periphery, 122a...protruding portion, 122b...opposing surface, 123...recess, 123b...bottom surface, 123c...curved surface, 123d...curved surface, 123s...side surface, 124...rib, 124a...tip, 125...opening, 125a...edge, 126...mounting hole, 127...second through hole, 127a...gradually increasing portion, 130...support portion, 131...base portion, 132...pedestal portion, 132a...tip, 132b...pedestal surface, 132c...screw hole, 133...reinforcing rib, 135...joint surface

Claims (8)

A flywheel housing that accommodates a flywheel connected to an output shaft of an engine,
a main body portion disposed on the engine side of the flywheel and having a housing portion for housing the flywheel;
a cover portion disposed on an opposite side of the flywheel from the engine, connected to the main body portion, and having an opening with an inner diameter smaller than an outer diameter of the flywheel;
Equipped with
the main body portion has a support portion that is provided on an upper portion of the main body portion and supports other members,
The support portion is
a base portion extending upward from an upper portion of the main body portion;
a pedestal portion provided on the base portion and extending toward the cover portion while avoiding the cover portion ,
A flywheel housing characterized in that the tip of the base portion in the extension direction is located closer to the surface of the cover portion than the joint surface between the main body portion and the cover portion, and closer to the main body portion than the surface of the cover portion. A flywheel housing as described in claim 1, characterized in that the support portion has a reinforcing rib connected to at least the base portion. 3. The flywheel housing according to claim 2 , wherein the reinforcing rib is inclined in a direction away from a lifting hook connected to the engine as it extends from the base portion toward the pedestal portion. A flywheel housing as described in claim 1, characterized in that, when viewed from above the engine, the engine and components connected to the engine are not positioned so as to overlap the upper surface of the base portion. A flywheel housing as described in claim 1, characterized in that, when viewed from above the engine, the base portion is located at a position spaced apart from a lifting hook connected to the engine. two of the support portions,
2. The flywheel housing according to claim 1, wherein the two support portions are provided at positions symmetrical with respect to the output shaft when viewed from above the engine. A flywheel housing as described in claim 1, characterized in that the support portion is positioned so as to overlap the output shaft when viewed from above the engine. An engine having a flywheel housing that houses a flywheel connected to an output shaft of the engine,
The flywheel housing is
a main body portion disposed on the engine side of the flywheel and having a housing portion for housing the flywheel;
a cover portion disposed on an opposite side of the flywheel from the engine, connected to the main body portion, and having an opening with an inner diameter smaller than an outer diameter of the flywheel;
Equipped with
the main body portion has a support portion that is provided on an upper portion of the main body portion and supports other members,
The support portion is
a base portion extending upward from an upper portion of the main body portion;
a pedestal portion provided on the base portion and extending toward the cover portion while avoiding the cover portion ,
An engine characterized in that the tip of the base portion in the extension direction is located closer to the surface of the cover portion than the joint surface between the main body portion and the cover portion, and closer to the main body portion than the surface of the cover portion .