JP6794673B2 - Engine equipment - Google Patents

Description

The present invention relates to an engine device including a balancer for reducing the inertial force of an engine piston.

Conventionally, a technique has been known in which an engine is provided with a balancer (unbalanced weight) and the inertial force generated by rotating the balancer reduces the inertial force due to the piston. (See, for example, Patent Document 1).

The balancer is rotatably supported in the engine case via bearings. For example, as the bearing that supports the balancer, a bearing having an outer race, an inner race, and a rolling element such as a ball or a roller is used.

When the balancer is supported by the engine case using such a bearing, the rotational resistance of the bearing changes depending on the positional relationship between the outer race and the inner case, and the rotational torque of the balancer supported by the bearing is large. It will change. The rotational torque of the balancer utilizes the output of the engine, and in order to improve the efficiency of the engine, it is preferable to reduce the rotational torque of the balancer. Therefore, it is important to adjust the positions of the outer race and the inner race.

The position adjustment between the outer race and the inner race is performed, for example, by adjusting the thickness of the shim placed between the bearing (here, the outer race) and the bearing fixing lid that regulates the axial position. There is.

Japanese Unexamined Patent Publication No. 2012-127424

As described above, when adjusting the positional relationship between the outer race and the inner race of the bearing supporting the balancer, it is necessary to adjust the thickness of the shim.

Whether or not the thickness of the shim is appropriate can be grasped only after mounting the shim, mounting the bearing fixing lid on the engine case, and checking the rotational state of the balancer.

Therefore, if the thickness of the shim used is not appropriate, the bearing fixing lid must be removed, the thickness of the shim must be changed, and then a series of operations to check the rotation state of the balancer must be repeated. There is a problem that it takes time and effort.

Further, even if a shim having an appropriate thickness is incorporated, the state of the engine may change as the engine is operated, and the state of the bearing may become inappropriate. Even in such a case, there is a problem that it takes time and effort to replace the shim in the same manner as described above.

The present invention has been made in view of the above problems, and an object of the present invention is to provide a technique capable of easily and appropriately adjusting the state of a bearing supporting a balancer.

In order to achieve the above object, the engine device according to one aspect of the present invention is arranged in a rotatable balancer and around the balancer in order to suppress the vibration of the engine by the driving force transmitted from the crankshaft. A bearing that has an inner race, a rolling element arranged on the outer peripheral side of the inner race, and an outer race arranged on the outer peripheral side of the inner race via the rolling element, and rotatably supports the balancer in the engine case. , The balancer at the tip is located at one end side of the bearing fixing lid fixed to the engine case and the outer race of the bearing of the bearing fixing lid so as to regulate the position of one end side of the bearing balancer in the rotation axis direction. It includes a screw member that is screwed so that its position in the direction of the rotation axis can be adjusted.

Further, the engine device may have a plurality of screw members.

Further, the engine device may further include a screw-side gear provided on one end side of each screw member and a common gear that can mesh with all of the plurality of screw-side gears.

Further, in the above engine device, the screw side gear may be detachable from one end side of the screw member.

Further, in the above engine device, the screw member is a disk or an annular member, and the surface on the outer race side is one end side with respect to at least a part of the entire circumference of the surface on one end side of the outer race. There may be.

Further, in the above engine device, the bearing fixing lid has a cylindrical cylindrical portion, a first thread groove is formed on the inner peripheral surface of the cylindrical portion, and the screw member is a disk or an annular member. A second thread groove that is screwed with the first thread groove of the bearing fixing lid may be formed on the outer peripheral surface of the screw member.

Further, in the engine device, the screw member is an annular member, the first tooth is formed on the inner peripheral portion, and the gear portion on which the second tooth that engages with the first tooth is formed. A screw member rotating member having a shaft portion connected to the gear portion and protruding to one end side of the bearing fixing lid through a through hole of the bearing fixing lid may be further provided.

According to the present invention, the state of the bearing supporting the balancer can be easily and appropriately adjusted.

FIG. 1A is a partial cross-sectional view of the engine device according to the first embodiment of the present invention. FIG. 1B is a side view of the engine device according to the first embodiment of the present invention. It is a partial sectional view in the plane along the axis of the crankshaft of the engine device which concerns on 1st Embodiment of this invention. It is sectional drawing around the attachment part of the balancer in the engine which concerns on 1st Embodiment of this invention. FIG. 4A is a diagram illustrating adjustment of bearing positions by a plurality of screws according to the first embodiment of the present invention. FIG. 4B is a top view of a screw adjusting mechanism for adjusting with a plurality of screws according to the first embodiment of the present invention. FIG. 4C is a perspective view of a screw adjusting mechanism for adjusting with a plurality of screws according to the first embodiment of the present invention. It is sectional drawing around the attachment part of the balancer in the engine which concerns on 2nd Embodiment of this invention.

Hereinafter, the engine device according to some embodiments of the present invention will be described with reference to the accompanying drawings. The same parts have the same reference numerals, and their names and functions are also the same. Therefore, detailed explanations about them will not be repeated.

FIG. 1A is a partial cross-sectional view of the engine device according to the first embodiment of the present invention. FIG. 1B is a side view of the engine device according to the first embodiment of the present invention.

The engine device 1 includes a diesel engine (hereinafter, simply referred to as an engine) 10 as an example of an internal combustion engine. The engine 10 was attached to a cylinder block 11 provided with a cylinder for accommodating the piston 15 so as to be reciprocally movable, a cylinder head 12 fixed to the upper part of the cylinder block 11 by a bolt (not shown), and a lower part of the cylinder block 11. It includes a crankcase 13 as an example of an engine case, and an oil pan 14 attached to the lower part of the crankcase 13 and storing lubricating oil for lubricating each part of the engine 10. Although FIG. 1A shows only one cylinder, the engine 10 may be a single cylinder or a plurality of cylinders.

The cylinder block 11 and the crankcase 13 rotatably support the crankshaft 17. The crankshaft 17 is connected to the piston 15 via a connecting rod 16.

A pair of balancers 20 (20A, 20B) having a rotation axis parallel to the axial direction of the crankshaft 17 is rotatably supported on the crankcase 13.

As shown in FIG. 1B, an output gear 30 is integrally rotatably connected to one end of the crankshaft 17. Further, an input gear 32 and an output gear 33 are integrally rotatably connected to one end of one balancer 20A, and an input gear 34 that meshes with the output gear 33 is integrally rotatably connected to one end of the other balancer 20B. Has been done.

The output gear 30 connected to the crankshaft 17 and the input gear 32 of the balancer 20A can transmit a driving force via an idle gear 31 that meshes with both of them. The output gear 30, the idle gear 31, and the input gear 32 are set so that the rotation speed of the balancer 20A is one times the rotation speed of the crankshaft 17. Further, the input gear 34 and the output gear 33 are set so that the rotation speeds of the balancers 20 (20A, 20B) are the same.

With such a configuration, when the crankshaft 17 rotates in the clockwise direction, one balancer 20A passes through the output gear 30, the idle gear 31, and the input gear 32 in the clockwise direction to be one times the number of rotations of the crankshaft 17. Rotate with. Further, the other balancer 20B rotates in the counterclockwise direction at the same rotation speed as the balancer 20A via the output gear 33 and the input gear 34. In this way, since the pair of balancers 20 (20A, 20B) rotate, the vertical inertial force of the piston 15 is canceled (completely canceled or reduced) by the inertial force of the balancer 20. ..

Next, a state in which the balancer 20 is attached to the engine 10 will be described.

FIG. 2 is a partial cross-sectional view of the surface of the crankshaft of the engine according to the first embodiment of the present invention along the axis. Although FIG. 2 shows only one balancer 20A, the other balancer 20B also has the same configuration of the mounting portion of the engine 10 to the crankcase 13.

The balancer 20A is rotatably supported by a plurality of bearings 40 (two in FIG. 2) with respect to the crankcase 13.

The bearing 40 on one end side (right side in the drawing) of the balancer 20A in the balancer rotation axis direction is regulated by the bearing fixing lid 45 at the position of the balancer 20A in the balancer rotation axis direction and the radial direction. The bearing fixing lid 45 is provided with an adjusting mechanism portion 50 capable of adjusting the position of the outer race 43 of the bearing 40 in the balancer rotation axis direction, which will be described later. The adjusting mechanism unit 50 will be described later.

The input gear 32 and the output gear 33 are integrally rotatably connected to the other end side (left side in the drawing) of the balancer 20A in the balancer rotation axis direction.

Next, the mounting portion and the related portion on the bearing fixing lid side of the balancer 20 will be described in detail.

FIG. 3 is a cross-sectional view of the periphery of the balancer mounting portion in the engine according to the first embodiment of the present invention.

The bearing 40 is arranged between the inner race 41 arranged on the outer periphery of the balancer, the outer race 43 arranged on the outer diameter side of the inner race 41, and the inner race 41 and the outer race 43, and is arranged with the inner race 41. It has a conical roller 42 as an example of a rolling element that facilitates relative rotation with the outer race 43.

Bearing fixing lids 45 that regulate the position of the bearing 40 are provided on the outside of the bearing 40 in the rotation axis direction (upper part of FIG. 3) and the radial outside of the outer race 43. The bearing fixing lid 45 is attached to the crankcase 13 by a bolt (not shown).

An annular shim 51 is arranged between the outer surface of the outer race 43 in the direction of the balancer rotation axis and the bearing fixing lid 45. The shim 51 is made of, for example, iron, aluminum, copper, or the like.

The balancer rotation that allows the adjusting mechanism 50 and the screw 71, which is an example of the screw member, to be screwed into the position corresponding to the outside of the shim 51 of the bearing fixing lid 45 in the axial direction of the balancer rotation. One or more screw holes 45A extending in the axial direction are formed. The screw 71 screwed into the screw hole 45A of the bearing fixing lid 45 has, for example, a tip portion 71A having a flat surface perpendicular to the balancer rotation axis. In the present embodiment, the tip portion 71A of the screw 71 can be brought into contact with the shim 51 by screwing the screw 71 into the screw hole 45A and adjusting the amount of rotation of the screw 71, and the tip portion 71A of the screw 71 can be brought into contact with the shim 51. The position of the balancer in the rotation axis direction can be adjusted.

With such a configuration, when the screw 71 is rotated to adjust the position of the tip portion 71A in the balancer rotation axis direction, the shim 51 is pressed by the shim 51 at the position in the balancer rotation axis direction of the shim 51 pushed by the tip portion 71A of the screw 71. The position of the outer race 43 of the bearing 40 in the direction of the balancer rotation axis can be adjusted. As a result, the rotational resistance of the bearing 40 can be adjusted, and the rotational torque of the balancer 20 can be adjusted.

Next, the adjustment of the position of the outer race 43 of the bearing 40 in the balancer rotation axis direction by the plurality of screws 71 will be described.

FIG. 4A is a diagram illustrating adjustment of bearing positions by a plurality of screws according to the first embodiment of the present invention. FIG. 4B is a top view of a screw adjusting mechanism for adjusting with a plurality of screws according to the first embodiment of the present invention. FIG. 4C is a perspective view of a screw adjusting mechanism for adjusting with a plurality of screws according to the first embodiment of the present invention.

In the configuration shown in FIG. 4A, when adjusting the position of the outer race 43 of the bearing 40 in the balancer rotation axis direction by a plurality of screws 71, each screw 71 is rotated independently and the tip of each screw 71 is used. It is necessary to align the position of the balancer 71A in the rotation axis direction with high accuracy.

In the present embodiment, in order to align the position of the tip portion 71A of each screw 71 with high accuracy, the configuration shown in FIGS. 4 (B) and 4 (C) can be used.

That is, in the present embodiment, the same gear 72 as an example of the screw side gear can be attached to and detached from the head 71B of each screw 71, and a common gear 73 that meshes with the gear 72 attached to each screw 71 is provided. I have to. A rotary shaft portion 73A extending from the center toward the bearing fixing lid 45 and being insertable into the recess 45B formed in the bearing fixing lid 45 is fixed to the common gear 73, and from the center to the side opposite to the bearing fixing lid 45. A rotating handle 73B is attached to extend and facilitate the rotation of the common gear 73.

According to such a configuration, when the common gear 73 is rotated by the rotating handle portion 73B, each gear 72 that meshes with the common gear 73 can be rotated by the same angle, and the screw 71 to which each gear 72 is attached can be rotated. Can be rotated by the same angle. As a result, the amount of movement of each screw 71 in the balancer rotation axis direction can be adjusted with high accuracy. It is necessary to align the position of the tip portion 71A of each screw 71 in the balancer rotation axis direction in advance. For example, each of the same screws 71 manufactured with high precision is attached to each of the bearing fixing lids 45. It is left completely attached to the screw hole 45A, and in that state, the gear 72 attached to each screw 71 is engaged with the common gear 73, and the common gear 73 rotates each gear 72 in the direction of removing the screw 71. It can be realized by this.

After determining the position of each screw 71, the common gear 73 or the gear 72 attached to each screw 71 may be removed.

As described above, according to the engine device 1 according to the present embodiment, the position of the outer race 43 in the balancer rotation axis direction can be adjusted by adjusting the rotation amount of the screw 71. Therefore, the bearing fixing lid 45 The axial position of the outer race 43 of the bearing 40 can be easily and appropriately adjusted without removing the bearing 40 from the crankcase 13.

Next, the engine device according to the second embodiment of the present invention will be described.

The engine device according to the second embodiment of the present invention is different from the engine device according to the first embodiment mainly in the configuration of the bearing fixing lid 45 and the adjusting mechanism unit 50.

FIG. 5 is a cross-sectional view of the periphery of the balancer mounting portion in the engine device according to the second embodiment of the present invention.

In the engine device according to the present embodiment, the thread groove 45C is formed on the inner circumference of the bearing fixing lid 45 near the outer side in the balancer rotation axis direction.

A substantially annular screw member 75 is arranged on the outside of the shim 51 in the direction of the balancer rotation axis. The surface of the screw member 75 on the outer race 43 side is one end side with respect to at least a part of the entire circumference of the surface on the one end side of the outer race 43. A screw groove 75A that meshes with the screw groove 45C of the bearing fixing lid 45 is formed on the outer periphery of the screw member 75. Further, a tooth (first tooth) 75B is formed on the inner circumference of the screw member 75.

A screw member rotating member 76 for rotating the screw member 75 is rotatably mounted on the bearing fixing lid 45. The screw member rotating member 76 is inserted into a through hole 45D formed in the surface of the bearing fixing lid 45 in the direction of the balancer rotation axis, and has a shaft portion 78 having substantially the same diameter as the through hole 45D and a screw member 75 of the shaft portion 78. To rotate the shaft 78, which is fixed to the end on the side and fixed to the other end side of the shaft 78 and the gear 77 on which the tooth (second tooth) 77A that meshes with the tooth 75B of the screw member 75 is formed. It is provided with a rotating handle portion 79 used for the above. In the present embodiment, the bearing fixing lid 45 communicates between the balancer 20 side and the side opposite to the balancer 20 only through the through hole 45D, but the through hole 45D has substantially the same diameter. Since the shaft portion 78 is inserted, the space on the balancer 20 side of the bearing fixing lid 45 can be sealed, and the lubricating oil can be appropriately prevented from leaking to the outside of the crankcase 13.

With such a configuration, when the shaft portion 78 of the screw member rotating member 76 is rotated, the gear 77 fixed to the shaft portion 78 rotates, and the screw member 75 that meshes with the gear 77 rotates, and the balancer rotates in the axial direction. The position will be adjusted. As a result, the position of the outer race 43 arranged via the screw member 75 and the shim 51 in the balancer rotation axis direction can be adjusted, and the positional relationship between the outer race 43 and the inner race 41 can be adjusted, resulting in bearings. The rotational resistance of 40 can be adjusted, and the rotational torque of the balancer 20 can be adjusted.

As described above, according to the engine device 1 according to the present embodiment, the screw member 75 can be rotated to adjust the position of the outer race 43 in the balancer rotation axis direction. Therefore, the bearing fixing lid 45 is attached to the crankcase 13. The axial position of the outer race 43 of the bearing 40 can be easily and appropriately adjusted without removing it from the bearing 40.

The present invention is not limited to the above-described embodiment, and can be appropriately modified and implemented without departing from the spirit of the present invention.

For example, in each of the above embodiments, the shim 51 is arranged on one end side of the outer race 43 of the bearing 40, and the position of the outer race 43 in the balancer rotation axis direction is adjusted via the shim 51. The invention is not limited to this, and the position of the outer race 43 may be adjusted by bringing the outer race 43 into contact with the screw 71 and the screw member 75 without providing the shim 51.

Further, in the first embodiment, the gear 72 can be attached to and detached from the head 71B of the screw 71, but the present invention is not limited to this, and the head 71B of the screw 71 may be formed as the gear 72. ..

Further, in each of the above embodiments, the screw 71 or the screw member 75 is provided with the rotating handle portions 73B and 79 on the assumption that the rotation amount of the screw 71 or the screw member 75 is adjusted by a person. When the amount of rotation of the screw is adjusted by using the power of a motor or the like, the handle portion for rotation may be changed to a configuration capable of receiving an input of power from the motor or the like, for example, a gear.

Further, in the second embodiment, the screw member 75 has an annular shape, but the present invention is not limited to this, and the screw member may have a disk shape. In this case, the portion of the surface of the screw member of the bearing fixing lid 45 facing the outer surface in the direction of the balancer rotation axis may be a through hole so that the screw member can be rotated from the outside.

Further, in each of the above embodiments, a conical roller bearing is shown as an example of the bearing 40, but the present invention is not limited to this, and the inner race and the outer race are not in contact with each other, and the inner race and the outer race are used. Any bearing that requires adjustment of the axial position may be used.

Further, in the above embodiment, the engine is a diesel engine, but the present invention is not limited to this, and can be widely applied to other engines having different fuels such as a gasoline engine.

1 Engine device 10 Engine 11 Cylinder block 12 Cylinder head 13 Crank case 14 Oil pan 15 Piston 16 Connecting rod 17 Crank shaft 20, 20A, 20B Balancer 30 Output gear 31 Idle gear 32 Input gear 33 Output gear 34 Input gear 40 Bearing 41 Inner Race 42 Conical roller 43 Outer race 45 Bearing fixing lid 45A Through hole 45B Recess 45C Thread groove 45D Through hole 50 Adjustment mechanism 51 Sim 71 Screw 72 Gear 73 Common gear 73A Rotating shaft 73B Rotating handle 75 Screw member 75A Groove 75B Tooth 76 Thread member Rotating member 77 Gear 77A Tooth 78 Shaft 79 Rotating handle

Claims (4)

A balancer that can rotate to suppress engine vibration by the driving force transmitted from the crankshaft,
It has an inner race arranged around the balancer, a rolling element arranged on the outer peripheral side of the inner race, and an outer race arranged on the outer peripheral side of the inner race via the rolling element. Bearings that rotatably support the balancer in the engine case,
A bearing fixing lid mounted on the engine case so as to regulate the position of the bearing on one end side in the rotation axis direction of the balancer.
A screw member screwed into a position of the bearing fixing lid on one end side of the outer race of the bearing so that the position of the balancer at the tip end in the rotation axis direction can be adjusted.
A screw-side gear provided on one end side of each of the plurality of screw members,
A common gear that can mesh with all of the plurality of screw side gears,
An engine device equipped with. The engine device according to claim 1, wherein the screw side gear is removable to one end side of the screw member . A balancer that can rotate to suppress engine vibration by the driving force transmitted from the crankshaft,
It has an inner race arranged around the balancer, a rolling element arranged on the outer peripheral side of the inner race, and an outer race arranged on the outer peripheral side of the inner race via the rolling element. Bearings that rotatably support the balancer in the engine case,
A bearing fixing lid mounted on the engine case so as to regulate the position of the bearing on one end side in the rotation axis direction of the balancer.
A screw member screwed into a position of the bearing fixing lid on one end side of the outer race of the bearing so that the position of the balancer at the tip end in the rotation axis direction can be adjusted.
With
The bearing fixing lid has a cylindrical cylindrical portion, and a first screw groove is formed on the inner peripheral surface of the cylindrical portion.
The screw member is a disk or an annular member, and a second screw groove screwing with the first screw groove of the bearing fixing lid is formed on the outer peripheral surface of the screw member. Engine device. The screw member is an annular member, and a first tooth is formed on the inner peripheral portion.
A gear portion on which a second tooth that engages with the first tooth is formed, a shaft portion that is connected to the gear portion and projects through a through hole of the bearing fixing lid to one end side of the bearing fixing lid, and a shaft portion. The engine device according to claim 3, further comprising a screw member rotating member having a bearing .

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