CN111486204B - Assembly structure of automatic tensioner of internal combustion engine for vehicle - Google Patents
Assembly structure of automatic tensioner of internal combustion engine for vehicle Download PDFInfo
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- CN111486204B CN111486204B CN202010070527.7A CN202010070527A CN111486204B CN 111486204 B CN111486204 B CN 111486204B CN 202010070527 A CN202010070527 A CN 202010070527A CN 111486204 B CN111486204 B CN 111486204B
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- Prior art keywords
- pulley
- automatic tensioner
- lower arm
- arm portion
- tensioner
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H7/00—Gearings for conveying rotary motion by endless flexible members
- F16H7/08—Means for varying tension of belts, ropes, or chains
- F16H7/10—Means for varying tension of belts, ropes, or chains by adjusting the axis of a pulley
- F16H7/12—Means for varying tension of belts, ropes, or chains by adjusting the axis of a pulley of an idle pulley
- F16H7/1254—Means for varying tension of belts, ropes, or chains by adjusting the axis of a pulley of an idle pulley without vibration damping means
- F16H7/1281—Means for varying tension of belts, ropes, or chains by adjusting the axis of a pulley of an idle pulley without vibration damping means where the axis of the pulley moves along a substantially circular path
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
- F02B67/00—Engines characterised by the arrangement of auxiliary apparatus not being otherwise provided for, e.g. the apparatus having different functions; Driving auxiliary apparatus from engines, not otherwise provided for
- F02B67/04—Engines characterised by the arrangement of auxiliary apparatus not being otherwise provided for, e.g. the apparatus having different functions; Driving auxiliary apparatus from engines, not otherwise provided for of mechanically-driven auxiliary apparatus
- F02B67/06—Engines characterised by the arrangement of auxiliary apparatus not being otherwise provided for, e.g. the apparatus having different functions; Driving auxiliary apparatus from engines, not otherwise provided for of mechanically-driven auxiliary apparatus driven by means of chains, belts, or like endless members
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H7/00—Gearings for conveying rotary motion by endless flexible members
- F16H7/08—Means for varying tension of belts, ropes, or chains
- F16H7/10—Means for varying tension of belts, ropes, or chains by adjusting the axis of a pulley
- F16H7/12—Means for varying tension of belts, ropes, or chains by adjusting the axis of a pulley of an idle pulley
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H7/00—Gearings for conveying rotary motion by endless flexible members
- F16H7/18—Means for guiding or supporting belts, ropes, or chains
- F16H7/20—Mountings for rollers or pulleys
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H7/00—Gearings for conveying rotary motion by endless flexible members
- F16H7/08—Means for varying tension of belts, ropes, or chains
- F16H2007/0842—Mounting or support of tensioner
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H7/00—Gearings for conveying rotary motion by endless flexible members
- F16H7/08—Means for varying tension of belts, ropes, or chains
- F16H2007/0889—Path of movement of the finally actuated member
- F16H2007/0893—Circular path
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H7/00—Gearings for conveying rotary motion by endless flexible members
- F16H7/08—Means for varying tension of belts, ropes, or chains
- F16H2007/0889—Path of movement of the finally actuated member
- F16H2007/0897—External to internal direction
Abstract
Provided is an assembling structure of an automatic tensioner for a vehicle internal combustion engine, which can improve the assembling rigidity of the automatic tensioner relative to a motor generator. The motor generator includes: a housing portion; and a lower arm portion fastened to the engine main body by a fastening member. The 2 nd automatic tensioner has a 1 st fitting piece and a 2 nd fitting piece, is fixed to the lower arm portion by the 1 st fitting piece, and is fixed to the case portion by the 2 nd fitting piece. The 2 nd tensioner pulley is disposed above the base. When a virtual line connecting the axial center of the rotating shaft of the 1 st pulley and the axial center of the fastening member is projected to the lower arm portion, the width of the 1 st portion of the lower arm portion on the 1 st fitting piece side with respect to the virtual line is formed larger than the width of the 2 nd portion on the opposite side of the 1 st portion with respect to the virtual line.
Description
Technical Field
The present invention relates to an assembling structure of an automatic tensioner of an internal combustion engine for a vehicle.
Background
Conventionally, as an assembly structure of an automatic tensioner for a vehicle internal combustion engine, an assembly structure described in patent document 1 is known. In the mounting structure described in patent document 1, an accessory mounting bracket fixed to an engine main body integrally includes a cylindrical housing of an oil filter extending from a mounting surface on which an automatic tensioner is mounted, and a tension pulley that guides an endless belt that drives an accessory is supported by a mounting boss integrally provided with the cylindrical housing. Accordingly, the mounting structure described in patent document 1 can improve the mounting rigidity of the tension pulley that guides the endless belt that drives the auxiliary equipment of the engine.
Documents of the prior art
Patent literature
Patent document 1: japanese patent laid-open publication No. 2003-148161
Disclosure of Invention
Problems to be solved by the invention
However, in the case where the auxiliary device is a motor generator, it is considered to mount an automatic tensioner to the motor generator to prevent loosening of the belt.
In this case, if the mounting rigidity of the automatic tensioner with respect to the motor generator is low, there is a problem that the vibration of the automatic tensioner increases.
The present invention has been made in view of the above circumstances, and an object thereof is to provide a mounting structure of an automatic tensioner for a vehicle internal combustion engine, which can improve mounting rigidity of the automatic tensioner with respect to a motor generator.
Means for solving the problems
In order to achieve the above object, the present invention is an assembly structure of an automatic tensioner for a vehicle internal combustion engine, the vehicle internal combustion engine including: an engine main body having a crankshaft pulley; a motor generator disposed on a side of the engine body and having a 1 st pulley; an auxiliary device disposed below the motor generator and having a 2 nd pulley; a belt wound around the crankshaft pulley, the 1 st pulley, and the 2 nd pulley; and an automatic tensioner for adjusting the tension of the belt, the automatic tensioner comprising: a base fixed to the motor generator; an arm supported by the base and freely swinging; and a tensioner pulley provided at a swing tip end of the arm portion and contacting the belt in the vicinity of the 1 st pulley, wherein the motor generator includes: a cylindrical housing portion extending in an axial direction of the rotation shaft of the 1 st pulley; and a lower arm portion extending from the outer case portion toward an inner peripheral side of the belt and in a direction approaching the crankshaft pulley, and fastened to the engine main body by a fastening member, the automatic tensioner including: a 1 st mounting piece extending laterally from the base; and a 2 nd mounting piece extending upward from the base, wherein the automatic tensioner is fixed to the lower arm portion by the 1 st mounting piece and is fixed to the housing portion by the 2 nd mounting piece, wherein the tensioner pulley is disposed above the base, and wherein, when a virtual line connecting an axial center of a rotation shaft of the 1 st pulley and an axial center of the fastening member is projected onto the lower arm portion, a 1 st portion of the lower arm portion on the 1 st mounting piece side with respect to the virtual line has a width larger than a 2 nd portion on a side opposite to the 1 st portion with respect to the virtual line.
Effects of the invention
Thus, according to the present invention described above, the mounting rigidity of the automatic tensioner with respect to the motor generator can be improved.
Drawings
Fig. 1 is a right side view of an internal combustion engine for a vehicle of one embodiment of the present invention.
Fig. 2 is a perspective view of an internal combustion engine for a vehicle according to an embodiment of the present invention.
Fig. 3 is a perspective view of a motor generator and an automatic tensioner of one embodiment of the present invention.
Fig. 4 is a right side view of the motor generator and the automatic tensioner of one embodiment of the present invention.
Fig. 5 is a front view of the motor generator and the automatic tensioner of one embodiment of the present invention.
Fig. 6 is a rear left view of the motor generator and the automatic tensioner of one embodiment of the present invention.
Fig. 7 is a perspective view of a tensioner of one embodiment of the present invention.
Description of the reference numerals
7-8230, 9-8230, 15A-8230, a crankshaft pulley 20-8230, an auxiliary device 20A-8230, a 2 nd pulley 20B-8230, a rotating shaft 41A-8230, a belt 50-8230, a motor generator 50A-8230, a 1 st pulley 50C-8230, a rotating shaft 51-8230, a housing 51A-8230, a 1 st reinforcing rib, a 53A-8230, a 1 st section 53B-8230, a 2 nd section 53L-8230, an imaginary line 54-8230, a 1 st assembly section (assembly section), 55-8230, a 2 nd assembly section (assembly section), 55A-8230, a 2 nd assembly section (assembly section), a 2 nd, 60 th tensioner 8230, an automatic tensioner 8230, 61-8230, an arm-823063, an arm-mounting tab 8230, an assembly section 8230, an assembly tab 8230, a tensioner assembly tab, a tensioner 8230, a tensioner, a tensioner assembly tab, and a mounting tab 823063.
Detailed Description
One embodiment of the present invention is an assembly structure of an automatic tensioner of a vehicle internal combustion engine, the vehicle internal combustion engine including: an engine body having a crankshaft pulley; a motor generator disposed on a side of the engine body and having a 1 st pulley; an auxiliary device disposed below the motor generator and having a 2 nd pulley; a belt wound around the crankshaft pulley, the 1 st pulley, and the 2 nd pulley; and an automatic tensioner that adjusts a tension of the belt, the automatic tensioner having: a base fixed to the motor generator; an arm supported by the base and freely swinging; and a tensioner pulley provided at the swing front end of the arm and contacting the belt in the vicinity of the 1 st pulley, wherein the motor generator comprises: a cylindrical outer shell portion extending in the axial direction of the rotating shaft of the 1 st pulley; and a lower arm portion extending from the outer shell portion toward an inner peripheral side of the belt and in a direction approaching the crankshaft pulley, and fastened to the engine body by a fastening member, the automatic tensioner including: a 1 st fitting piece extending laterally from the base; and a 2 nd fitting piece extending upward from the base, the automatic tensioner being fixed to the lower arm portion by the 1 st fitting piece and being fixed to the case portion by the 2 nd fitting piece, the tensioner pulley being disposed at a position above the base, and a width of a 1 st portion of the lower arm portion on the 1 st fitting piece side with respect to an imaginary line is formed larger than a width of a 2 nd portion on a side opposite to the 1 st portion with respect to the imaginary line, when the imaginary line connecting an axial center of a rotation shaft of the 1 st pulley and an axial center of the fastening member is projected to the lower arm portion. Thus, the mounting structure of the automatic tensioner for the vehicle internal combustion engine according to the embodiment of the present invention can improve the mounting rigidity of the automatic tensioner with respect to the motor generator.
[ examples ] A method for producing a compound
Hereinafter, an embodiment of an assembly structure of an automatic tensioner for a vehicle internal combustion engine according to the present invention will be described with reference to the accompanying drawings.
Fig. 1 to 7 are views showing an assembling structure of an automatic tensioner of an internal combustion engine for a vehicle of one embodiment of the present invention. In fig. 1 to 7, regarding the up-down, front-back, and left-right directions, when the traveling direction of the vehicle is the forward direction and the backward direction is the backward direction, the width direction of the vehicle is the left-right direction, and the height direction of the vehicle is the up-down direction.
First, the configuration will be explained.
In fig. 1 and 2, an engine 7 as a vehicle internal combustion engine is coupled to a transmission not shown. The engine 7 and the transmission are arranged side by side in a vehicle width direction (left-right direction) of a vehicle (not shown). The engine 7 converts thermal energy into mechanical energy, and the transmission changes the rotational speed of the engine 7 and outputs the changed rotational speed.
The engine 7 includes an engine main body 9, and the engine main body 9 includes: a cylinder block 11, a cylinder head 12, a head cover 13, and an oil pan 14.
A plurality of cylinders, not shown, are provided in the cylinder block 11. The cylinders are aligned in the vehicle width direction. A piston, not shown, is housed in the cylinder, and the piston reciprocates in the vertical direction with respect to the cylinder.
The pistons are coupled to the crankshaft 15 via unillustrated connecting rods, and the reciprocating motion of the pistons is converted into rotational motion of the crankshaft 15 via the connecting rods.
The crankshaft 15 extends in the same direction as the direction in which the cylinders are arranged. Thus, the engine 7 is constituted by a transverse engine.
A valve chamber, not shown, is formed between the cylinder head 12 and the cylinder head cover 13, and an exhaust camshaft and an intake camshaft, not shown, are housed in the valve chamber. The timing chain connects the crankshaft 15 to the intake camshaft and the exhaust camshaft, and the power of the crankshaft 15 is transmitted to the intake camshaft and the exhaust camshaft via the timing chain.
The exhaust port 11e opens at the front side portion 12a of the cylinder head 12. Exhaust ports of the respective cylinders are formed in the cylinder head 12 so as to be collected toward the exhaust port 11 e. In other words, the structure of the exhaust manifold is disposed inside the cylinder head 12.
Oil for lubricating a crankshaft 15, a piston, and the like is stored in the oil pan 14.
The motor generator 50 is provided at the front side portion 11a of the cylinder block 11 and the front side portion 12a of the cylinder head 12. The motor generator 50 is a rotating electrical machine having functions of both a motor and a generator, and is also referred to as a motor generator (motor generator).
The motor generator 50 is fastened to the cylinder head 12 by a bolt 18A and to the cylinder block 11 by a bolt 18B.
An auxiliary machine 20 is provided at a front side portion 11a of the cylinder block 11 below the motor generator 50. The auxiliary equipment 20 includes, for example, a compressor of an air conditioner. The auxiliary machine 20 is fastened to the cylinder block 11 by bolts not shown.
A chain cover 21 is fitted to right side portions of the cylinder block 11 and the cylinder head 12. The chain cover 21 covers a timing chain, not shown, provided at the end portions of the cylinder block 11 and the cylinder head 12. The chain cover 21 is fastened to the right side portion on the side of the front side portions 11a, 12a by bolts 18F.
A crankshaft pulley 15a is provided at an end of the crankshaft 15 on the right side of the chain cover 21 (left-hand side in the paper plane direction of fig. 2). The motor generator 50 is provided with a 1 st pulley 50A, and the 1 st pulley 50A is coupled to a rotation shaft 50C of the motor generator 50.
The auxiliary 20 is provided with a 2 nd pulley 20a, and the 2 nd pulley 20a is coupled to a rotating shaft 20b of the auxiliary 20.
An endless belt 41A is wound around the crankshaft pulley 15a, the 1 st pulley 50A, and the 2 nd pulley 20A. The power of the crankshaft 15 is transmitted from the crankshaft pulley 15a to the 1 st pulley 50A and the 2 nd pulley 20A via the belt 41A. Thereby, the motor generator 50 generates electric power, and the auxiliary machinery 20 is driven.
Further, another belt, not shown, is wound around the crankshaft pulley 15a.
The power of the crankshaft 15 is transmitted from the crankshaft pulley 15a to other auxiliary equipment (for example, a water pump) not shown via a belt not shown. Thereby, other auxiliary devices are driven.
The crank pulley 15a is divided in the front-rear direction with respect to the axial direction (vehicle width direction) of the crank 15, and the belt 41A and a belt (not shown) are wound around the divided crank pulley 15a. That is, the belt 41A is offset from a belt, not shown, in the axial direction of the crankshaft 15.
In this way, the engine 7 of the present embodiment transmits power from the engine main body 9 to the motor generator 50 and the accessories 20 via the belt 41A.
The chain cover 21 is provided with a 1 st automatic tensioner 43 that adjusts the tension of the belt 41A. The 1 st automatic tensioner 43 has: bracket 44, arm member 45, and 1 st tensioner pulley 46.
The bracket 44 is fastened to the chain cover 21 by bolts 18J, 18K. The bracket 44 is formed by bending in an L-shape, and one end 45a of the arm member 45 is connected to the bent portion of the bracket 44 to be rotatable. Thus, the arm member 45 can swing around the curved portion.
The 1 st tensioner pulley 46 is coupled to the other end 45b of the arm member 45 and is rotatable, and the 1 st tensioner pulley 46 is in contact with the belt 41A.
The bent portion of the bracket 44 and the swing center portion of the arm member 45 are coupled by a torsion spring not shown. The torsion spring biases the arm member 45 in one direction to cause the 1 st tensioner pulley 46 to press the belt 41A. Thus, the belt 41A is given tension by the 1 st automatic tensioner 43.
In the 1 st automatic tensioner 43, when a reaction force is applied from the belt 41A, the arm member 45 swings in the other direction against the urging force of the torsion spring, and absorbs the variation in the tension of the belt 41A that varies due to the torque variation of the engine 7.
In this way, the 1 st automatic tensioner 43 presses the 1 st tensioner pulley 46 against the belt 41A by swinging the arm member 45 in one direction and the other direction under the spring force of the torsion spring, or adjusts the tension of the belt 41A by receiving the reaction force of the belt 41A.
The bracket 44 includes mounting portions 44B and 44C. The mounting portion 44B is provided near the lower portion of the cylinder head 12 and on the side of the chain cover 21 in the vertical direction, i.e., the height direction of the engine 7, and is fastened to the chain cover 21 by a bolt 18J.
The mounting portion 44C is provided above the mounting portion 44B, is provided on the front side of the engine body 9 with respect to the mounting portion 44B, and is fastened to the chain cover 21 by a bolt 18K.
The motor generator 50 is provided with a 2 nd automatic tensioner 60 that adjusts the tension of the belt 41A. The 2 nd automatic tensioner 60 constitutes an automatic tensioner in the present invention.
The 2 nd automatic tensioner 60 has: a base 61 fixed to the motor generator 50; an arm 62 supported by the base 61 and swingably movable; and a 2 nd tensioner pulley 63 provided at the swing leading end of the arm 62, contacting the belt 41A in the vicinity of the 1 st pulley 50A.
As shown in fig. 3, 4, 5, and 6, in the present embodiment, motor generator 50 includes: a cylindrical outer shell 51 extending in the axial direction of the rotary shaft 50C of the 1 st pulley 50A; and a lower arm portion 53 extending from the outer case portion 51 toward the inner circumferential side of the belt 41A and in a direction approaching the crank pulley 15a, and fastened to the engine main body 9 by a bolt 18B as a fastening member.
The 2 nd automatic tensioner 60 has: a 1 st fitting piece 64 extending laterally from the base portion 61; and a 2 nd fitting piece 65 extending upward from the base portion 61, the 2 nd automatic tensioner 60 being fixed to the lower arm portion 53 by the bolt 18H through the 1 st fitting piece 64, and being fixed to the 2 nd fitting piece 65 of the case portion 51 by the bolt 18H through the 2 nd fitting piece 65. The 2 nd tensioner pulley 63 is disposed above the base 61.
In addition, when a virtual line 53L connecting the axial center of the rotating shaft 50C of the 1 st pulley 50A and the axial center of the bolt 18B as the fastening member is projected onto the lower arm portion 53, the width of the 1 st portion 53A of the lower arm portion 53 on the 1 st fitting piece 64 side with respect to the virtual line 53L is formed larger than the width of the 2 nd portion 53B on the opposite side of the 1 st portion 53A with respect to the virtual line 53L.
In the present embodiment, the 1 st portion 53A of the lower arm portion 53 has the 1 st fitting portion 54 to which the 1 st fitting piece 64 is fixed, and the 1 st fitting portion 54 protrudes from the edge portion of the lower arm portion 53 toward the 2 nd automatic tensioner 60 side.
In the present embodiment, a plurality of 1 st reinforcing ribs 51A extending radially outward from the radial center portion of the housing portion 51 are provided at the end portion of the housing portion 51 on the 1 st pulley 50A side in the axial direction, and 1 of the 1 st reinforcing ribs 51A is connected to the lower arm portion 53.
At the end of the 1 st pulley 50A side in the axial direction of the housing part 51, 4 pairs of 1 st reinforcing ribs 51a,1 st reinforcing rib 51A extending substantially parallel to each other, and 1 other pair of 1 st reinforcing ribs 51A adjacent in the circumferential direction are provided at an angle different by 90 degrees. In other words, 1 pair of the 1 st reinforcing ribs 51A is orthogonal to another 1 pair of the 1 st reinforcing ribs 51A adjacent in the circumferential direction.
In the present embodiment, the 2 nd reinforcing rib 55A is arranged at the edge of the 2 nd portion 53B of the lower arm portion 53, and the 2 nd reinforcing rib 55A extends further outward than the 1 st fitting piece 64 in the radial direction of the housing, and is bent in the circumferential direction of the housing portion 51 along the outer end of the lower arm portion 53 and extends toward the 1 st fitting portion 54.
The motor generator 50 also has an upper arm portion 52 that protrudes radially outward and upward from the outer peripheral portion of the housing portion 51. The upper arm portion 52 is fixed to an upper bracket 71 provided at the front side portion 12a of the cylinder head 12 of the engine main body 9.
The lower arm portion 53 is fixed to a lower bracket 72 provided at the front portion 11a of the cylinder block 11 of the engine main body 9 by a bolt 18B. The 1 st fitting portion 54 is joined to a lower portion of the lower side arm portion 53.
The arm portion 62 of the 2 nd automatic tensioner 60 is supported to be swingable about a swing center axis 62C of the base portion 61.
A 2 nd reinforcing rib 53C is provided at an outer edge portion of the 1 st fitting portion 54, the 2 nd reinforcing rib 53C extending further outward in the radial direction of the housing part 51 than the 1 st reinforcing rib 51A, and opposed to the 1 st fitting piece 64 in the circumferential direction of the housing part 51.
The length of the 1 st fitting piece 64 is formed shorter than the length of the 2 nd fitting piece 65. The 2 nd fitting piece 65 is fixed to the housing portion 51 at a position above the axial center of the rotation shaft 63C of the 2 nd tensioner pulley 63.
As shown in fig. 7, the 1 st and 2 nd tabs 64 and 65 have inner reinforcing ribs 64A, 65A and outer reinforcing ribs 64B, 65B as the 3 rd reinforcing rib extending toward the circumferential direction of the housing portion 51. The inner reinforcing rib 65A and the outer reinforcing rib 65B extend in a direction substantially perpendicular to the 1 st reinforcing rib 51A.
The ridge lines 64BL, 65BL of the outside reinforcing ribs 64B, 65B and the ridge lines 64AL, 65AL of the inside reinforcing ribs 64A, 65A are inclined so as to approach the 1 st and 2 nd fitting pieces 64, 65, respectively, as going from the base 61 to the front end sides of the 1 st and 2 nd fitting pieces 64, 65. The edge lines of the outer ribs 64B, 65B are inclined more gently than the edge lines of the inner ribs 64A, 65A.
Next, the operation will be explained. As shown in fig. 1, the crankshaft pulley 15a rotates clockwise, and drives the motor generator 50 and the auxiliary equipment 20 via the belt 41A. The belt 41A extends downward from the 1 st pulley 50A toward the 2 nd pulley 20A, and the 2 nd tensioner pulley 63 contacts the belt 41A from the outside in the vicinity of the 1 st pulley 50A in the extending direction of the belt 41A between the 1 st pulley 50A and the 2 nd pulley 20A to apply tension to the belt 41A. Accordingly, the belt 41A is bent inward, and a load (reaction force) acts on the 2 nd tensioner pulley 63 of the 2 nd automatic tensioner 60 from the belt 41A toward the outer side of the belt 41A.
In the present embodiment, the motor generator 50 includes: a cylindrical outer shell 51 extending in the axial direction of the rotary shaft 50C of the 1 st pulley 50A; and a lower arm portion 53 extending from the outer case portion 51 toward the inner peripheral side of the belt 41A and in a direction approaching the crank pulley 15a, and fastened to the engine main body 9 by a fastening member.
The 2 nd automatic tensioner 60 has: a 1 st fitting piece 64 extending laterally from the base portion 61; and a 2 nd fitting piece 65 extending upward from the base portion 61, the 2 nd automatic tensioner 60 being fixed to the lower arm portion 53 by the 1 st fitting piece 64 and to the housing portion 51 by the 2 nd fitting piece 65. The 2 nd tensioner pulley 63 is disposed above the base 61.
In addition, when a virtual line 53L connecting the axial center of the rotating shaft 50C of the 1 st pulley 50A and the axial center of the fastening member is projected onto the lower arm portion 53, the width of the 1 st portion 53A of the lower arm portion 53 on the 1 st fitting piece 64 side with respect to the virtual line 53L is formed larger than the width of the 2 nd portion 53B on the opposite side of the 1 st portion 53A with respect to the virtual line 53L.
In this way, since the width of the 1 st part 53A is formed larger than the width of the 2 nd part 53B, the 1 st part 53A of the lower arm portion 53 can be brought close to the 2 nd automatic tensioner 60, and the rigidity of the 1 st part 53A can be improved. Therefore, the fitting rigidity of the 2 nd automatic tensioner 60 to the lower arm portion 53 can be improved. Therefore, the mounting rigidity of the 2 nd automatic tensioner 60 with respect to the motor generator 50 can be improved, and the vibration of the 2 nd automatic tensioner 60 can be suppressed.
In the present embodiment, the 1 st portion 53A of the lower arm portion 53 has the 1 st fitting portion 54 to which the 1 st fitting piece 64 is fixed, and the 1 st fitting portion 54 protrudes from the edge portion of the lower arm portion 53 toward the 2 nd automatic tensioner 60 side.
Accordingly, the 1 st mounting portion 54 can be brought closer to the 2 nd automatic tensioner 60, and the 1 st mounting piece 64 can be shortened, so that the mounting rigidity of the 2 nd automatic tensioner 60 with respect to the motor generator 50 can be improved.
In the present embodiment, a plurality of 1 st reinforcing ribs 51A extending radially outward from the radial center portion of the housing portion 51 are provided at the end portion of the housing portion 51 on the 1 st pulley 50A side in the axial direction, and 1 of the reinforcing ribs is connected to the lower arm portion 53.
In this way, since 1 of the plurality of 1 st reinforcing ribs 51A extending radially outward from the radially central portion of the housing portion 51 is coupled to the lower arm portion 53, the rigidity of the lower arm portion 53 coupled to the 1 st fitting portion 54 can be increased, and the fitting rigidity of the 2 nd automatic tensioner 60 to the lower arm portion 53 can be increased.
In the present embodiment, the 2 nd reinforcing rib 55A is arranged at the edge of the 2 nd portion 53B of the lower arm portion 53, and the 2 nd reinforcing rib 55A extends further outward than the 1 st fitting piece 64 in the radial direction of the housing, and is bent in the circumferential direction of the housing portion 51 along the outer end of the lower arm portion 53 and extends toward the 1 st fitting portion 54.
Accordingly, the rigidity of the lower arm portion 53 to which the 1 st fitting portion 54 is coupled can be increased by the 2 nd reinforcing rib 55A, and the fitting rigidity of the 2 nd automatic tensioner 60 to the lower arm portion 53 can be increased.
Although an embodiment of the present invention has been disclosed, it is apparent that modifications can be made by those skilled in the art without departing from the scope of the present invention. All such modifications and equivalents are intended to be included within the scope of the appended claims.
Claims (4)
1. An assembling structure of an automatic tensioner for a vehicle internal combustion engine,
the vehicle internal combustion engine includes:
an engine main body having a crankshaft pulley;
a motor generator disposed on a side of the engine body and having a 1 st pulley;
an auxiliary device disposed below the motor generator and having a 2 nd pulley;
a belt wound around the crankshaft pulley, the 1 st pulley, and the 2 nd pulley; and
an automatic tensioner for adjusting the tension of the belt,
the automatic tensioner includes: a base fixed to the motor generator; an arm supported by the base and swingably movable; and a tensioner pulley provided at a swing tip of the arm portion and contacting the belt in the vicinity of the 1 st pulley,
the above-described assembling structure of the automatic tensioner for an internal combustion engine for a vehicle is characterized in that,
the motor generator includes: a cylindrical outer shell portion extending in an axial direction of the rotating shaft of the 1 st pulley; and a lower arm portion extending from the outer case portion toward an inner circumferential side of the belt and in a direction approaching the crankshaft pulley, and fastened to the engine main body by a fastening member,
the automatic tensioner includes: a 1 st mounting piece extending laterally from the base; and a 2 nd fitting piece extending upward from the base portion, wherein the automatic tensioner is fixed to the lower arm portion by the 1 st fitting piece and to the case portion by the 2 nd fitting piece,
the tensioner pulley is disposed above the base,
when a virtual line connecting the axial center of the rotating shaft of the 1 st pulley and the axial center of the fastening member is projected onto the lower arm portion, a width of a 1 st portion of the lower arm portion on the 1 st fitting piece side with respect to the virtual line is formed to be larger than a width of a 2 nd portion on a side opposite to the 1 st portion with respect to the virtual line.
2. The assembling structure of an automatic tensioner for an internal combustion engine of a vehicle according to claim 1,
the 1 st portion of the lower arm portion has a 1 st fitting portion for fixing the 1 st fitting piece,
the 1 st fitting portion protrudes from an edge of the lower arm portion toward the automatic tensioner.
3. The assembling structure of an automatic tensioner for a vehicular internal combustion engine according to claim 2,
a plurality of reinforcing ribs extending radially outward from a radially central portion of the outer shell portion are provided at a 1 st pulley-side end portion of the outer shell portion in the axial direction,
1 of the plurality of reinforcing ribs is connected to the lower arm portion.
4. The assembling structure of an automatic tensioner for an internal combustion engine of a vehicle according to claim 3,
in the case where the reinforcing rib is a 1 st reinforcing rib, a 2 nd reinforcing rib is arranged at the edge of the 2 nd portion of the lower arm portion, and the 2 nd reinforcing rib extends further outward than the 1 st fitting piece in the radial direction of the housing, is bent in the circumferential direction of the housing portion along the outer end of the lower arm portion, and extends toward the 1 st fitting portion.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2019-011675 | 2019-01-25 | ||
| JP2019011675A JP7200696B2 (en) | 2019-01-25 | 2019-01-25 | Mounting structure of auto tensioner for vehicle internal combustion engine |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN111486204A CN111486204A (en) | 2020-08-04 |
| CN111486204B true CN111486204B (en) | 2022-12-06 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202010070527.7A Active CN111486204B (en) | 2019-01-25 | 2020-01-21 | Assembly structure of automatic tensioner of internal combustion engine for vehicle |
Country Status (3)
| Country | Link |
|---|---|
| JP (1) | JP7200696B2 (en) |
| CN (1) | CN111486204B (en) |
| DE (1) | DE102020200743B4 (en) |
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Also Published As
| Publication number | Publication date |
|---|---|
| JP2020118135A (en) | 2020-08-06 |
| CN111486204A (en) | 2020-08-04 |
| DE102020200743B4 (en) | 2021-09-09 |
| JP7200696B2 (en) | 2023-01-10 |
| DE102020200743A1 (en) | 2020-07-30 |
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