JPH08135464A - Chain tensioner mounting device of internal combustion engine - Google Patents

Abstract

PURPOSE: To make a chain tensioner and an intermediate body common to each other by providing a cylinder block with a single oscillation shaft mounting part and a chain tensioner with an intermediate body mounting part and a communication member mounting part. CONSTITUTION: A cylinder block, on which a single camshaft cylinder head and a double camshaft cylinder head are selectively mounted, is provided with a single oscillation shaft mounting part 46 on which an oscillation bolt 44, which is an oscillation shaft, is to be mounted. A chain tensioner 32 is provided with in intermediate body mounting part 36, which is fitted to an intermediate body 50 to make pressing force of an adjuster 56 fitted to the single camshaft cylinder head to act, and a communication member mounting part 38 on which a communication member 84, fitted with the intermediate body 50 to make pressing force of the adjuster 56 fitted to the double camshaft cylinder head to act, is to be fitted. Thus chain tensioners and intermediate bodies of SOHC and DOHC type internal combustion engines can be made common to each other and thereby reduce number of engine items.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a chain tensioner mounting device for an internal combustion engine, and more particularly to a so-called SOHC type internal combustion engine and a DOHC type internal combustion engine, which can be used as a chain tensioner and an intermediate body. The number of points can be reduced, erroneous assembly can be prevented from occurring in the assembly process in which the SOHC type internal combustion engine and the DOHC type internal combustion engine are mixed and flow, and the rocking shaft mounting portion of the cylinder block is common. A chain tensioner mounting device for an internal combustion engine, which can be made unnecessary, can eliminate the need for an adjuster mounting portion, can reduce the number of mounting portions, can reduce the working process and weight, and can prevent erroneous assembly. Regarding

[0002]

2. Description of the Related Art An internal combustion engine mounted on a vehicle includes a so-called SOHC (single overhead c) of a one-camshaft type in which intake and exhaust valves are driven by one camshaft.
amshaft) type internal combustion engine, and so-called DOH of two-camshaft type in which intake and exhaust valves are driven by two camshafts, respectively.
C (double overhead camshaf
There is a t) type internal combustion engine.

In the SOHC type internal combustion engine, a cylinder head for one cam shaft, which supports one cam shaft for driving intake and exhaust valves, is mounted on a cylinder block. The D
An OHC type internal combustion engine has a two-camshaft cylinder head, which supports two camshafts for driving intake and exhaust valves, mounted on a cylinder block.

In the internal combustion engine, the rotation of the crankshaft is transmitted to the camshaft by a timing chain to drive the intake / exhaust valves. This timing chain expands with the operating time, causing tooth jumps and noise. Therefore, in the internal combustion engine, a chain guide is provided on the tension side of the timing chain and a chain tensioner is provided on the slack side to apply a predetermined tension to the timing chain.

The chain tensioner is attached to an internal combustion engine. As a conventional chain tensioner attaching device, there is one shown in FIGS. 9 to 12. In FIG. 9, 102 is a cylinder head. The cylinder head 102 is an SOHC type internal combustion engine 104 shown in FIG.
And the SOHC type internal combustion engine 104 shown in FIG. 11 and FIG.
The camshaft cylinder head 108 and the two-camshaft cylinder head 110 of the DOHC type internal combustion engine 106 are selectively mounted.

The SOHC type internal combustion engine 104 is shown in FIG.
As shown in 0, the crankshaft 1 is attached to the cylinder block 102.
12 is rotatably supported, and the cylinder head 108 for one cam shaft is mounted. The one-cam shaft cylinder head 108 pivotally supports one cam shaft 114 that drives an intake / exhaust valve (not shown). A timing chain 120 is wound around a crank sprocket 116 provided on the crank shaft 112 and a cam sprocket 118 provided on one cam shaft 114.

Reference numeral 122 is a chain guide provided on the tension side of the timing chain 120. The chain guide 122 is attached to the guide attachment portion 124 of the cylinder block 104 and the guide attachment portion 126 of the cylinder head 108 for the first cam shaft, respectively, with guide attachment bolts 128 and 130.
It is installed by.

The DOHC type internal combustion engine 106 is shown in FIG.
As shown in FIG. 1 and FIG. 12, a crankshaft 112 is rotatably supported by a cylinder block 102, and a two-camshaft cylinder head 11
It is equipped with 0. Cylinder head 110 for 2 cam shafts
Supports two cam shafts 114, 114 for respectively driving intake and exhaust valves (not shown). A crank sprocket 116 provided on the crank shaft 112 and two cam shafts 114
A timing chain 120 is wound around the cam sprockets 118, 118 provided at 114.

Reference numeral 122 is a chain guide provided on the tension side of the timing chain 120. The chain guide 122 is attached to the guide attachment portion 124 of the cylinder block 102 and the guide attachment portion 126 of the 2 cam shaft cylinder head 110, respectively, and guide attachment bolts 128 and 130 are provided.
It is installed by.

As shown in FIG. 10, the timing chain 120 of the SOHC type internal combustion engine 104 is provided with a chain tensioner 132 on the loose side. The chain tensioner 132 is curved and formed in a substantially arc shape, and the swing bolt 134, which is a swing shaft on one end side, is attached to the cylinder block 102.
The other end side is swingably mounted by being mounted on the swing shaft mounting portion 136. The chain tensioner 132 includes a wear-resistant pad (pad) on the intermediate body mounting portion 138.
The intermediate body 140 is attached.

The chain tensioner 132 is subjected to a pushing force by the adjuster 142 via the intermediate body 140. The adjuster 142 is attached to the adjuster mounting portion 144 of the cylinder block 102 and the adjuster mounting portion 146 of the one-cam shaft type cylinder head 108 by the adjuster mounting bolts 148 and 150, respectively.

As a result, the SOHC type internal combustion engine 104
The chain tensioner 132 is subjected to a pushing force by the adjuster 142 via the intermediate body 140, and is swung around the swing bolt 134 to swing the timing chain 12
It is pushed toward the 0 side and gives a predetermined tension to the timing chain 120.

Further, as shown in FIGS. 10 and 11, the timing chain 120 of the DOHC type internal combustion engine 106 is provided with a chain tensioner 152 on the loose side. The chain tensioner 152 is curved in a substantially arc shape and has a swing bolt 154, which is a swing shaft on one end side, attached to the swing shaft attachment portion 156 of the cylinder block 102 so that the other end side is swingable. .

To the chain tensioner 152, one end side of a connecting member 160 formed in a connecting member mounting portion 158 and having a substantially rectangular frame shape is mounted by a connecting member mounting bolt 162. On the other end side of the connecting member 160, the intermediate body 1 which is a wear-resistant pad (pad) is attached to the intermediate body attaching portion 164.
66 is attached.

The chain tensioner 152 is pushed by an adjuster 168 via an intermediate body 166. The adjuster 168 is attached to the adjuster attaching portions 170, 170 of the two-cam shaft type cylinder head 110 with adjuster attaching bolts 172, 172.

As a result, the DOHC type internal combustion engine 106
The chain tensioner 152 is subjected to a pushing force by the adjuster 168 via the intermediate body 166 and the connecting member 160, is swung about the swing bolt 154, and is pushed toward the timing chain 120 side. A predetermined tension is applied to 120.

An example of such a chain tensioner mounting device for an internal combustion engine is disclosed in Japanese Utility Model Publication No. 62-31636. What is disclosed in this publication is D
A chain guide is provided on the tension side of the timing chain of the OHC type internal combustion engine so as to be sandwiched between the cylinder head and the cylinder head cover, and a chain tensioner is provided on the loose side of the timing chain.

[0018]

By the way, in the conventional chain tensioner device, one cam shaft 114 for driving the intake and exhaust valves of the SOHC type internal combustion engine 104 shown in FIG. Cylinder head 108 for cam shaft
And the DOHC type internal combustion engine 106 shown in FIGS.
Cam shafts 114 and 11 for driving the intake and exhaust valves, respectively
A cylinder block 102 for selectively mounting a 2-cam shaft cylinder head 110 that supports 4 and a chain tensioner 132.
Some have 152 attached.

However, the cylinder head 10 for one cam shaft
When selectively mounting the 8 and 2 camshaft cylinder heads 110 on the cylinder block 102, the chain tensioner 132 and the DOH for the SOHC type internal combustion engine 104 are used.
Not only is the structure of the C-type internal combustion engine 106 different from that of the chain tensioner 152, the chain tensioner 13
2 is the mounting position of the swing bolt 134 that is the swing center of the second swing bolt 15 that is the swing center of the chain tensioner 152.
There is a problem that the mounting positions of 4 are different from each other.

The SOHC type internal combustion engine 104 and the DO
With the HC type internal combustion engine 106, the adjuster 142.1
The mounting positions of 68 are different from each other. That is, in the SOHC type internal combustion engine 104, the adjuster mounting portion 144 of the cylinder block 102 and the cylinder head 1 for one cam shaft 1
The adjuster 142 is attached to the adjuster attaching portion 146 of 08 by the adjuster attaching bolts 148 and 150. On the other hand, in the DOHC type internal combustion engine 106, 2
Adjuster mounting portion 17 of camshaft cylinder head 110
The adjuster 168 is attached to the 0.170 by the guide attachment bolts 172 and 172.

Therefore, in the conventional chain tensioner mounting device provided with the cylinder block 102 on which the 1-cam shaft cylinder head 108 and the 2-cam shaft cylinder head 110 are selectively mounted, the SOHC having a different structure is used.
Type tensioner 132 and D for internal combustion engine 104
Chain tensioner 15 for OHC type internal combustion engine 106
2 is required, so that there is an inconvenience that the number of parts increases, and the SOHC internal combustion engine 104 and the DOHC
There is an inconvenience that erroneous assembly occurs in the assembly process of mixing and flowing the internal combustion engine 106 of the mold.

Further, the conventional cylinder head 1 for one cam shaft 1
In the chain tensioner mounting device provided with the cylinder block 104 on which the 08 and the 2-camshaft cylinder head 110 are selectively mounted, the SOHC type internal combustion engine 10
Swing shaft mounting portion 136 of the chain tensioner 132 for 4
And the adjuster mounting portion 144 of the adjuster 142 and the DO
Chain tensioner 152 for HC internal combustion engine 106
Since the rocking shaft mounting portions 156 of FIG. 2 are mixed, the number of each mounting portion is increased, which causes an increase in the working process and weight of each mounting portion, which causes erroneous assembly. There is.

[0023]

SUMMARY OF THE INVENTION In order to eliminate such inconvenience, the present invention relates to a one-cam-shaft cylinder head which supports one cam shaft for driving intake and exhaust valves of an internal combustion engine, respectively. A cylinder block that selectively mounts a two-camshaft cylinder head that supports two camshafts that respectively drive intake and exhaust valves is provided, and the other end can be swung by the swing shaft on one end. A chain tensioner, an adjuster for applying a pushing force to the chain tensioner via an intermediate body, and a single swing shaft mounting portion for mounting the swing shaft on the cylinder block. The tensioner is attached to the intermediate body attachment portion to which the intermediate body is attached so as to exert the pushing force of the adjuster attached to the first camshaft cylinder head and the second camshaft cylinder head. Characterized in that provided a contact member attaching portion to be attached the contact member mounted with the intermediate to exert a pushing force of the adjuster.

[0024]

According to the structure of the present invention, in the chain tensioner mounting device, the swing shaft is mounted on the cylinder block on which the one cam shaft cylinder head and the two cam shaft cylinder head are selectively mounted. The swing shaft mounting part of
The chain tensioner is acted on by the intermediate body attachment part to which the intermediate body is attached so as to exert the pushing force of the adjuster attached to the 1 camshaft cylinder head and the pushing force of the adjuster attached to the 2 camshaft cylinder head. By providing the connecting member mounting portion to which the connecting member to which the intermediate body is mounted is provided, the chain tensioner and the intermediate body can be shared in the so-called SOHC type internal combustion engine and the DOHC type internal combustion engine. Also, the swing shaft mounting portion of the cylinder block can be made common, and the adjuster mounting portion can be eliminated.

[0025]

Embodiments of the present invention will be described in detail below with reference to the drawings.

1 to 8 show an embodiment of the present invention. In FIG. 1, 2 is a cylinder head.
This cylinder head 2 is commonly used for the SOHC type internal combustion engine 4 shown in FIG. 6 and the DOHC type internal combustion engine 6 shown in FIGS. 7 and 8, and is a cylinder for one camshaft of the SOHC type internal combustion engine 4. A head 8 and a 2-camshaft cylinder head 10 of the DOHC type internal combustion engine 6 are selectively mounted.

In the SOHC type internal combustion engine 4, as shown in FIG. 6, a crankshaft 12 is supported by a cylinder block 2 and a 1-camshaft cylinder head 8 is mounted. The one-cam shaft cylinder head 8 pivotally supports one cam shaft 14 that drives an intake / exhaust valve (not shown). A timing chain 20 is wound around a crank sprocket 16 provided on the crank shaft 12 and a cam sprocket 18 provided on one cam shaft 14.

A chain guide 22 is provided on the tension side of the timing chain 20. Chain guide 22
Through the guide mounting holes (not shown) of the guide mounting portion 24 of the cylinder block 2 and the guide mounting holes (not shown) of the guide mounting portion 26 of the 1-camshaft cylinder head 8 by means of the guide mounting bolts 28 and 30, respectively. It is installed.

In the DOHC type internal combustion engine 6, as shown in FIGS. 7 and 8, a crankshaft 12 is pivotally supported by a cylinder block 2 and a 2-camshaft cylinder head 10 is mounted. The two-cam shaft cylinder head 10 includes a suction / not shown
Two cam shafts 14, 14 for driving the exhaust valves are rotatably supported. A timing chain 20 is wound around the crank sprocket 16 provided on the crank shaft 12 and the cam sprockets 18 provided on the two cam shafts 14 and 14.

A chain guide 22 is provided on the tension side of the timing chain 20. Chain guide 22
Is attached to the guide mounting holes (not shown) of the guide mounting portion 24 of the cylinder block 2 and the guide mounting holes (not shown) of the guide mounting portion 26 of the cylinder head 10 for the 2 cam shaft with the guide mounting bolts 28 and 30. ing.

The timing chain 20 of the SOHC type internal combustion engine 4 and the timing chain 20 of the DOHC type internal combustion engine 6 are provided with a chain tensioner 32 on the loose side.

As shown in FIGS. 2 to 5, the chain tensioner 32 is curved in a substantially arc shape, has a swing shaft hole 34 at one end, and has an intermediate body mounting portion 36 and a connecting member mounting portion at the other end side. 38 are provided. This chain tensioner 32
Is a SOHC type internal combustion engine 4 and a DOHC type internal combustion engine 6
It is formed into a shape that can be used for both. The intermediate body attachment portion 36 is provided with an intermediate body engagement edge 40. A connecting member mounting hole 42 is provided in the connecting member mounting portion 38.

The chain tensioner 32 is attached to the cylinder block 2 so that the other end of the chain tensioner 32 can be swung by a swing bolt 44 which is a swing shaft inserted through a swing shaft hole 34 on one end. As shown in FIG. 1, the cylinder block 2 is provided with a single swing shaft mounting portion 46 to which the swing bolt 44 is mounted. The swing shaft mounting portion 46 is provided with a swing shaft mounting hole 48 into which the swing bolt 44 is screwed.

Intermediate body engaging edge 40 of the intermediate body mounting portion 36
An intermediate body 50, which is a wear resistant pad, is attached to the. The intermediate body 50 includes the engagement piece 52 and the contact portion 54.
Consists of The engagement piece 52 is engaged with the intermediate body engagement edge 40 so as to sandwich the intermediate body engagement edge 40 from both sides. Abutment 5
4, the pushing force by the adjuster 56 is applied.

As shown in FIG. 8, an adjuster 56 for exerting a pushing force on the chain tensioner 32 via the intermediate body 50 has an insertion hole 60 and a mounting hole 62 in the adjuster body 58, as shown in FIG.
And a pusher body 64 which is mounted in the mounting hole 62 so as to be retractable so as to exert a pushing force on the intermediate body 50.
4, a pressure chamber 66 for applying a pushing force is provided, a spring 68 is provided in the pressure chamber 66, and a pressure oil passage 70 for supplying pressure oil to the pressure chamber 66 is provided, and a check valve 72 is provided in the middle of the pressure oil passage 70. Is provided.

The adjuster 56 is commonly attached to the 1-cam shaft cylinder head 8 and the 2-cam shaft cylinder head 10 by the adjuster mounting bolts 74 inserted through the insertion holes 60. The 1-cam shaft cylinder head 8 and the 2-cam shaft cylinder head 10 are provided with an adjuster mounting portion 76 and an adjuster mounting portion 78, respectively. The adjuster 56 is a cylinder head for one cam shaft by screwing the adjuster mounting bolts 74 into the adjuster mounting holes (not shown) of the adjuster mounting portion 76 and the adjuster mounting holes (not shown) of the adjuster mounting portion 78, respectively. 8 and 2 camshaft cylinder heads 10 are mounted respectively.

Further, the cylinder heads 8 and 2 for one cam shaft
The camshaft cylinder head 10 is provided with a pressure oil introduction passage 80 that communicates with the pressure oil passage 70 of the adjuster 56. In this embodiment, only the introduction passage 80 of the two-camshaft cylinder head 10 is illustrated (see FIG. 8),
The illustration of the introduction passage of the cylinder head 8 for the 1-cam shaft is omitted.

The connecting member 84 is attached to the connecting member mounting portion 38 of the chain tensioner 32 by screwing a connecting member mounting bolt 82 into the connecting member mounting hole 42. The connecting member 84 is formed by connecting the connecting member mounting bolt 8 to one end side of the frame portion 86 formed in a substantially rectangular frame shape in the longitudinal direction.
An insertion hole 88 for inserting 2 is provided, and an intermediate body attachment portion 90 is provided at the other end of the frame portion 86 in the longitudinal direction by bending. The intermediate body attaching portion 90 is provided with an engaging edge 92 for engaging the engaging piece 52 of the intermediate body 50.

Thus, the chain tensioner 32 is
The intermediate body mounting portion 36 to which the intermediate body 50 is mounted so as to exert the pushing force of the adjuster 56 mounted to the 1-camshaft cylinder head 8 and the adjuster 56 mounted to the 2-camshaft cylinder head 10. And a connecting member attaching portion 38 to which the connecting member 84 to which the intermediate body 50 is attached is attached so as to exert the pushing force.

Next, the operation will be described.

The SOHC type internal combustion engine 4 includes a crank sprocket 16 of a crankshaft 12 which is rotatably supported by a cylinder block 2 and a single camshaft cylinder head 8 mounted on the cylinder block 2. A timing chain 20 is wound around the cam sprocket 18 of the cam shaft 14. The timing chain 20 has a chain guide 22 on the tension side and a chain tensioner 32 on the loose side.

The DOHC type internal combustion engine 6 includes a crank sprocket 16 of a crankshaft 12 which is rotatably supported by the cylinder block 2 and two crankshafts 10 which are rotatably supported by a 2-camshaft cylinder head 10 mounted on the cylinder block 2. Cam shaft 14
The timing chain 20 is wound around the 14 cam sprockets 18. Timing chain 20
Has a chain guide 22 on the tension side and a chain tensioner 32 on the loose side.

The cylinder block 2 is commonly used by the SOHC type internal combustion engine 4 and the DOHC type internal combustion engine 6, and the cylinder head 8 for one cam shaft of the SOHC type internal combustion engine 4 and the DOHC type internal combustion engine. 6 and a 2-camshaft cylinder head 10 are selectively mounted. A chain tensioner 32 for applying a predetermined tension to the timing chain 20 of the SOHC type internal combustion engine 4 and the DOHC type internal combustion engine 6
The timing chain 20 and the chain tensioner 32 are formed in a shape that can be commonly used, and are attached to the single swing shaft attachment portion 46 of the cylinder block 2.

In the SOHC type internal combustion engine 4, the adjuster 56 is mounted on the adjuster mounting portion 76 of the cylinder head 8 for one cam shaft by the adjuster mounting bolts 74.
The other end of the chain tensioner 32 is rocked by screwing a rocking bolt 44, which is inserted through the rocking shaft hole 34 on one end side of the chain tensioner 32, into a single rocking shaft mounting portion 46 of the cylinder block 2. Install as possible.

The intermediate body 50 is attached to the intermediate body attachment portion 36 of the chain tensioner 32. Contact part 5 of intermediate body 50
The pusher 64 of the adjuster 56 attached to the 1-camshaft cylinder head 8 is brought into contact with the shaft 4. Adjuster 5
6 pushes the pusher 64 with the pressure oil to apply a pushing force to the chain tensioner 32 via the intermediate body 50.

As a result, the chain tensioner 32 of the SOHC type internal combustion engine 4 is pushed by the adjuster 56 via the intermediate body 50 and is swung around the swing bolt 44 to swing the timing chain 20. It is pushed to the side and gives a predetermined tension to the timing chain 20.

Further, in the DOHC type internal combustion engine 6, the adjuster 56 is mounted on the adjuster mounting portion 78 of the 2-camshaft cylinder head 10 by the adjuster mounting bolts 74, and the single swing shaft mounting portion 4 of the cylinder block 2 is mounted.
The other end side of the chain tensioner 32 is swingably attached by screwing a swing bolt 44, which is inserted through the swing shaft hole 34 on one end side of the chain tensioner 32, to 6.

In the chain tensioner 32, a connecting member 84 is attached to the connecting member mounting portion 38 by a connecting member mounting bolt 82.
Of the connecting member 86 is attached, and the intermediate body 50 is attached to the intermediate body attaching portion 90 on the other end side of the connecting member 86 in the longitudinal direction. At the contact portion 54 of the intermediate body 50, the two camshaft cylinder head 1 is provided.
The pusher 64 of the adjuster 56 attached to 0 is brought into contact. The adjuster 56 pushes the pushing body 64 by the pressure oil, and applies a pushing force to the chain tensioner 32 via the intermediate body 50 and the connecting member 86.

As a result, the chain tensioner 32 of the DOHC type internal combustion engine 6 is urged by the adjuster 56 via the intermediate body 50 and the connecting member 86 to oscillate around the oscillating bolt 44. As a result, the timing chain 20 is pushed toward the timing chain 20 side, and a predetermined tension is applied to the timing chain 20.

As described above, this chain tensioner mounting device includes the swing bolt 44 as the swing shaft on the cylinder block 2 on which the one-camshaft cylinder head 8 and the two-camshaft cylinder head 10 are selectively mounted. A single swing shaft mounting part 46 that can be mounted is provided, and the chain tensioner 32 has one
Adjuster 5 mounted on camshaft cylinder head 8
6, the intermediate body mounting portion 36 to which the intermediate body 50 is attached to exert the pushing force of 6 and the connection of the intermediate body 50 to exert the pushing force of the adjuster 56 attached to the 2 camshaft cylinder head 10. The connecting member mounting portion 38 to which the member 84 is mounted is provided.

As a result, this chain tensioner mounting device can share the chain tensioner 32 and the intermediate body 50 in the so-called SOHC type internal combustion engine 4 and the DOHC type internal combustion engine 6, and also in the cylinder block 2. The swing shaft mounting portion 46 can be shared, and the conventional adjuster mounting portion 144 shown in FIG. 9 can be eliminated.

For this reason, this chain tensioner mounting device can share the chain tensioner 32 and the intermediate body 50 in the SOHC type internal combustion engine 4 and the DOHC type internal combustion engine 6, and thus the parts can be shared. The number of points can be reduced, and it is possible to prevent erroneous assembly in the assembly process in which the SOHC type internal combustion engine 4 and the DOHC type internal combustion engine 6 are mixed and flow.

Further, this chain tensioner mounting device is provided on the cylinder block 2 because the swing shaft mounting portion 46 of the cylinder block 2 can be shared and the conventional adjuster mounting portion can be eliminated. The number of mounting portions can be reduced, the working process and the weight can be reduced, and erroneous assembly can be prevented.

[0054]

As described above, according to the present invention, the chain tensioner attaching device includes the SOHC type internal combustion engine and the DO.
The chain tensioner and the intermediate body can be used in common with the HC type internal combustion engine. Therefore, this chain tensioner mounting device can reduce the number of parts by sharing the parts, and the SOHC type internal combustion engine and the DO
It is possible to prevent erroneous assembly in the assembly process for mixing and flowing with the HC type internal combustion engine.

Further, in this chain tensioner mounting device, the swing shaft mounting portion of the cylinder block can be made common, and the adjuster mounting portion can be eliminated.
For this reason, this chain tensioner mounting device uses a common swing shaft mounting part and eliminates the need for an adjuster mounting part.
The number of mounting portions can be reduced, the working process and the weight can be reduced, and erroneous assembly can be prevented.

[Brief description of drawings]

FIG. 1 is a front view of a cylinder block showing an embodiment of a chain tensioner attaching device according to the present invention.

FIG. 2 is a front view of a chain tensioner.

FIG. 3 is a right side view of the chain tensioner.

FIG. 4 is a left side view of the chain tensioner.

FIG. 5 is a rear view of the chain tensioner.

FIG. 6 is a front view of an SOHC type internal combustion engine.

FIG. 7 is a front view of a DOHC type internal combustion engine.

8 is a cross-sectional view taken along the line 〓-〓 of FIG.

FIG. 9 is a front view of a cylinder block showing a conventional example of a chain tensioner attaching device.

FIG. 10 is a front view of an SOHC type internal combustion engine.

FIG. 11 is a front view of a DOHC type internal combustion engine.

12 is a cross-sectional view taken along the line X〓-X〓 of FIG.

[Explanation of symbols]

 2 Cylinder Head 4 SOHC Type Internal Combustion Engine 6 DOHC Type Internal Combustion Engine 8 1 Camshaft Cylinder Head 10 2 Camshaft Cylinder Head 12 Crankshaft 14 Camshaft 16 Crank Sprocket 18 Cam Sprocket 20 Timing Chain 22 Chain Guide 34 Swing Shaft hole 36 Intermediate body mounting portion 38 Connecting member mounting portion 40 Intermediate body engaging edge 42 Connecting member mounting hole 44 Swing bolt 46 Swing shaft mounting portion 48 Swing shaft mounting hole 50 Intermediate body 52 Engaging piece 54 Abutting portion 56 Adjuster 74 Adjuster mounting bolt 82 Communication member mounting bolt 84 Communication member 86 Frame portion 90 Intermediate body mounting portion

Claims (1)

[Claims] 1. An intake / exhaust valve for an internal combustion engine is driven 1 respectively
A cylinder block for selectively mounting a cylinder head for one cam shaft that supports two cam shafts and a cylinder head for two cam shafts that supports two cam shafts that respectively drive the intake and exhaust valves. Provided is a chain tensioner capable of swinging on the other end side by a swing shaft on one end side, and an adjuster for exerting a pushing force on the chain tensioner via an intermediate body is provided. Is attached to the chain tensioner, and the intermediate body is attached to the chain tensioner so that the pushing force of the adjuster attached to the cylinder head for the first cam shaft is applied to the chain tensioner. And a connecting member attaching portion to which the connecting member attached to the intermediate body is attached to act the pushing force of the adjuster attached to the cylinder head for the two cam shaft. Chain tensioner mounting device for an internal combustion engine, characterized in that digit.