CN1153896C

CN1153896C - Timing belt cover supporting structure for engine

Info

Publication number: CN1153896C
Application number: CNB99104018XA
Authority: CN
Inventors: 山田真嗣
Original assignee: Suzuki Motor Corp
Current assignee: Suzuki Motor Corp
Priority date: 1998-03-18
Filing date: 1999-03-15
Publication date: 2004-06-16
Anticipated expiration: 2019-03-15
Also published as: CN1229167A; JPH11264324A

Abstract

An engine main body 1 is provided with a timing belt cover 32 which covers a crank timing pulley, a cam timing pulley and a timing belt laid over them. A bearing 34 is arranged for supporting a driving shaft 31, while projecting a case 33 of a water pump 30 attached to a cylinder block. The bearing 34 is inserted through an opening 35 on the center of the timing belt cover 32, and a bush 38 is attached thereto. An E ring is fitted into a circular groove 40 of the bearing 34. Since the center portion of the timing belt cover 32 is supported for a wide range by means of the E ring and the bush 38, its is possible to improve vibration damping effect and reduce generation of noises caused by vibration.

Description

The timing belt cover supporting structure of motor

Technical field

The present invention relates to the improvement of the timing belt cover supporting structure of motor.

Background technique

On the foru cycle engine of automobile-used and similar applications, adopt Timing Belt that it is cooperated with crankshaft rotating and synchronously drive valve gear and assisting agency etc.On this class motor, by a Timing Belt being wound on the timing belt pulley that is arranged at the bent axle, camshaft and the assisting agency's live axle that stretch out engine body one end the synchronously rotation of these devices respectively.Usually, have on the motor of Timing Belt, the timing belt cover that covering timing belt pulley and Timing Belt are installed on engine body is to stop the bonding of external foreign material such as water and dust.

Timing belt cover supporting structure referring now to Fig. 7 and 8 explanation prior arts.Shown in Fig. 7 and 8, at the axial end of the bent axle of engine body, in the bent axle 3 that stretches out cylinder block 2 lower ends with stretch out on the valve gear camshaft 5 of cylinder head 4 crankshaft timing pulley 6 and a cam timing belt wheel 7 are set respectively.In addition, a water pump 8 is installed on cylinder block 2, its live axle 9 stretches out and installation one Water-pump belt wheel 10 on this live axle 9.

One Timing Belt 11 is wound on crankshaft timing pulley 6, cam timing belt wheel 7 and the Water-pump belt wheel 10, applies a suitable tension force by the 12 pairs of Timing Belts 11 of Idle wheel that are arranged between crankshaft timing pulley 6 and the Water-pump belt wheel 10.And, cam timing belt wheel 7 and Water-pump belt wheel 10 are synchronously rotated by Timing Belt 11 by crankshaft timing pulley 6.

On cylinder block 2, lubricating pump 28 and water pump 8, one flange 13 is set to surround crankshaft timing pulley 6 in outstanding mode.To be installed on cylinder block 2 and the cylinder head 4 by extending the back plate 14 that covers cam timing belt wheel 7 back sides to cylinder head 4 tops by screw 15 from cylinder block 2 tops.On the plate 14 of back, form a flange 16 to surround cam timing belt wheel 7.And, the two ends of the flange 16 of the back plate 14 on the two ends of the flange 13 that forms on cylinder block 2, lubricating pump 28 and the water pump 8 and cylinder head 4 and installation cylinder head 4 are connected, form a series of covering by flange 13 with flange 16 thus and be connected surface 17, these cover and connect the surperficial Timing Belt 11 that surrounds crankshaft timing pulley 6, cam timing belt wheel 7, Water-pump belt wheel 10, tensioning pulley 12 and reel them.

By a Sealing 18A one timing belt cover of being made by synthetic resin 18 is connected in this covering and connects on the surface 17, to cover crankshaft timing pulley 6, cam timing belt wheel 7, Water-pump belt wheel 10, tensioning pulley 12 and their Timing Belt 11 of reeling.Timing belt cover 18 is installed on cylinder block 12 and the back plate 14 along the screw 19 (only illustrating two) that covers the periphery setting that connects surface 17 by a plurality of.Bent axle 3 passes the perforate that is located on the timing belt cover 18 20 and stretches out outwardly, and on its end, be equipped with one drive engine accessory (not shown) for example alternator and air compressor crankshaft pulley 21.

Be installed on the cylinder block 2 by the bolt 24 of a plurality of insertion installation bases 23 housing 22 water pump 8.One stud bolt 25 is fixedly installed on the installation base 23 of housing 22.This stud bolt 25 is fit to pass the nearly middle body of timing belt cover 18, and is screwed into a flange nut 26 with supporting timing belt cover 18 at its end.

For the purpose of reference, 27 expression valve mechanism cover in Fig. 7,28 expression lubricating pumps, and in Fig. 8,29 expression oil level gage conduits, 29A are represented to be fixed as one with flange nut 26 and timing belt cover 18 and are used for supporting the stay of oil level gage conduit 29.

Like this, by flange nut 26 being tightened to the middle body that supports timing belt cover 18 on the stud bolt 25 on the housing 22 that is fixedly installed on water pump 8, just can stop the generation of the resonance noise of timing belt cover 18.

Yet, in the above-mentioned timing belt cover supporting structure of traditional motor, exist following problem.Here it is, in order to support the middle body of timing belt cover 18, just flange nut 26 need be tightened on the stud bolt 25 that fixedly installs, and therefore makes assembly process complicated.And reason is very little and make the supporting portion area of timing belt cover 18 also less in flange nut 26, so the effect of vibration control is relatively poor.In addition, owing to must make Timing Belt 11 be provided with to such an extent that can avoid stud bolt 25, the restriction of structural configuration is just bigger.

Technology contents

The present invention finishes according to the problems referred to above just, thereby the purpose of this invention is to provide a kind of supporting structure that assembles easily and control the good timing belt cover of vibrating effect.

First characteristics that are used for the supporting structure of timing belt cover according to the present invention are: at the motor with the timing belt cover that covers Timing Belt, stretch out by being arranged on a housing part that makes the auxiliary device that is installed on the engine body in the timing belt cover, and the extension of described housing penetrates the through hole that is arranged on nearly timing belt cover middle body and stretches out outwardly, and described extension and through hole interconnect.

Thus, the middle body of timing belt cover is by this extension supporting that is installed in the auxiliary device on the engine body.

According to second characteristics of the present invention, the included auxiliary device of supporting structure of the timing belt cover in first characteristics of the present invention is a water pump.

Thus, the middle body of timing belt cover is the extension supporting by water pump cover.

According to the 3rd characteristics of the present invention, the water pump live axle of second characteristics is to pass this extension and stretch out towards the outside of timing belt cover.

Thus, water pump is that the outside from timing belt cover is driven.

According to the 4th characteristics of the present invention, in any one characteristic of above-mentioned three characteristics, the extension of housing is to be connected by E shape ring with the through hole of timing belt cover.

Thus, the middle body of timing belt cover is to be supported by the extension of the housing of auxiliary device by this E shape ring.

According to the 5th characteristics of the present invention, the supporting structure of the timing belt cover in arbitrary characteristics of above-mentioned first to the 3rd characteristics is: the claw that forms in formed groove and the through hole at timing belt cover on the extension at housing is meshed.

Thus, the middle body of timing belt cover is to be supported by described extension by the engagement of described groove and pawl.

According to the 6th characteristics of the present invention, the edge of described throughhole portions is provided with at least three biting hooks immovably combining with the extension of auxiliary device when the snap-action, and between described throughhole portions and auxiliary device an elastic device is set.

Thus, described throughhole portions edge and the extension noise of strong bonded to prevent to produce mutually by vibration.

Description of drawings

Fig. 1 is the vertical side sectional view of mounting portion of the timing belt cover of first embodiment of the invention;

Fig. 2 is the front elevation with the mounting portion of the timing belt cover among the Fig. 1 shown in the part disconnect mode;

Fig. 3 is the amplification front elevation that is used in the E shape ring on the supporting structure of timing belt cover shown in Figure 1;

Fig. 4 is the vertical side sectional view of major component of the timing belt cover mounting portion of second embodiment of the invention;

Fig. 5 is the vertical side view of the through hole of the timing belt cover shown in Fig. 4;

Fig. 6 is the front elevation of the through hole of the timing belt cover shown in Fig. 4;

Fig. 7 is the vertical side sectional view of the mounting portion of traditional engine timing belt cover;

Fig. 8 is the front elevation that the part of the mounting portion of traditional engine timing belt cover disconnects.

Embodiment

Describe some embodiments of the present invention in detail according to these accompanying drawings below.For the purpose of reference, because the structure of these embodiments and above-mentioned prior art is roughly the same except the central support layout partly of water pump structure, tensioning pulley and timing belt cover, with also represent at the same section shown in Fig. 7 and 8 with same label, and only describe different piece in detail.

Referring now to Fig. 1 to 3 first embodiment of the present invention is described.As illustrated in fig. 1 and 2, in first embodiment's motor, a water pump 30 (auxiliary device) is installed on the cylinder block 2, and its live axle 31 stretches out timing belt cover 32.And, the end of live axle 31 belt wheel (not shown) is installed and be fit to other auxiliary device (not shown) for example alternator and air compressor by vee-belt (not shown) by crankshaft pulley 21 drivings of bent axle 3.

The housing 33 of water pump 30 is to make in the mode around the live axle 31 that stretches out, and forms the general cylindrical shape bearing part 34 (extension) that a rotating support inserts live axle 31 wherein.This bearing part 34 inserts in the through hole 35 that is connected surperficial 17 timing belt covers that are connected, 32 middle bodies setting by screw 19 with the cover cap of engine body 1, and encircles 36 (see figure 3)s by E shape and combine with described through hole 35.

The end of bearing part 34 is provided with a stepped portion 37, and the outer peripheral portion of bearing part 34 with by elastic material for example a ring-type lining 38 that abuts on this stepped portion 37 making of rubber be connected.The through hole of timing belt cover 32 is connected with this lining 38 and abuts on the formed stepped portion 39 of lining 38 peripheries, and between the stepped portion 39 that is clamped in the E shape ring that is embedded in the terminal water jackets 40 that form of bearing part 34 and lining 38, through hole 35 combines with this bearing part 34.

The embodiment's who constitutes like this working condition then is described.

Timing belt cover 32 is connected with cylinder block 2 and back plate 14 at its periphery by a plurality of screws 19, and partly upward combines with the bearing part of water pump 30 in the central by E shape ring, is installed in thus on the engine body 1.Because the middle body of timing belt cover 32 is to be supported by E shape ring and lining 38 in large area, vibration-isolating effect can reduce well because the noise that vibration is produced.

Because the through hole of timing belt cover 32 is to combine with the bearing part 34 of water pump 30 by E shape ring 36, just can easily timing belt cover 32 be installed on the engine body 1.

And, because the traditional double hook bolt of supporting timing belt cover 32 middle bodies does not need, increased the degrees of freedom that designs thereby just reduced the restriction that Timing Belt 11 is arranged.

Then, with reference to Fig. 4 to 6 second embodiment of the present invention is described.Because second embodiment's formation is except being basically the same as those in the first embodiment substantially the through hole of timing belt cover and the combining structure difference between the water pump bearing part, just show to be omitted with the same section shown in Fig. 1 and 2 below, and different parts only is described with same label and to their explanation.

As shown in Figure 4, in second embodiment's motor, omitted E shape ring, through hole 35 directly combines with the bearing part 34 of water pump 30 by the claw 41 that forms on the through hole 34 of timing belt cover 32.

The periphery of the end of the bearing part 34 of water pump 30 is provided with a stepped portion 42 and an annular slot (slot part).As illustrated in Figures 5 and 6, the through hole 35 of timing belt cover 32 is being provided with a plurality of (being three in the drawings) claw (biting hook) equally spacedly along its edge.One side of claw 41 tilts, and this incline section is pushed and stretches when the end by bearing part 34 inserts bearing part 34 in the through holes 35, with by snap-action and annular slot 43 secure bond.And claw 41 is connected with annular slot 43 by the elastic material ring-type lining 45 made of rubber for example by being provided with one between the step part 44 of the step part 42 of bearing part 34 and through hole 35, and through hole 35 and bearing part 34 mutually combine.

After constituting like this, when timing belt cover 32 being installed in when making through hole 35 fitted bearing parts 34 on the engine body 1 simultaneously, be pushed near making the middle body of timing belt cover 32, claw 41 just is pushed and is backed down by the end of bearing part 34 and combine with annular slot 43, thereby through hole 35 is combined with bearing part 34.Therefore, timing belt cover 32 can be easily mounted on the engine body 1.

Because the middle body of timing belt cover 32 is to combine with the bearing part 34 of water pump 30 and support in large area by claw 41 and lining 45 by claw 41, thereby the good minimizing of vibration-isolating effect is owing to vibrating the noise that produces.Certainly, the combination between timing belt cover 32 and bearing part 34 is not limited to claw 41 and annular slot 43.Can adopt the projection, flange or the similar structure that combine with this claw 41 to replace groove 43.

And equally in first embodiment, owing to do not need to support the stud bolt of timing belt cover 32, the restriction that Timing Belt 11 is arranged is just little thereby the degrees of freedom of design is increased.

In order to reference for the purpose of the explanation, in above-mentioned first and second embodiments, the bearing part of water pump cover is to be fit to combine with the through hole of timing belt cover, but the present invention is not limited to these embodiments, for example, the housing of any engine accessory on the engine body that is installed in the timing belt cover is stretched out and insert in the through hole, to combine with timing belt cover.Certainly because lining the 38, the 45th, for the purpose in conjunction with the edge of through hole 35 is provided with, can adopt any elastic device for example spring replace lining 38,45.

According to first characteristics of the present invention, because be installed in the housing that stretches out of the auxiliary device on the engine body combines with the through hole of timing belt cover by formation, the middle body of timing belt cover be by auxiliary device stretch out housing supporting, just can prevent since the resonance of the caused timing belt cover of engine luggine to reduce the noise of generation.And, owing to do not need to be used to support the traditional double hook bolt of timing belt cover middle body, thus the degrees of freedom that the restriction of timing belt arrangement has been increased design just reduced.

According to second characteristics of the present invention, by form a protruding part on water pump cover, the middle body of timing belt cover is by this protruding part supporting of water pump.

According to the 3rd characteristics of the present invention, because the live axle of water pump is to insert this extension and stretch out timing belt cover, water pump can be driven in the timing belt cover outside.

According to the 4th characteristics of the present invention, owing to combine with the through hole of timing belt cover by the extension of E shape ring with the auxiliary device housing, the middle body of timing belt cover is the extension supporting by the auxiliary device housing.

According to the 5th characteristics of the present invention, owing to be fit to mutually combine at slot part that forms on the extension of auxiliary device housing and the claw that forms on the timing belt cover through hole, the middle body of timing belt cover is by the extension supporting of auxiliary device housing by the combination between slot part and claw.

According to the 6th characteristics of the present invention, because the edge of throughhole portions is provided with at least three biting hooks and is provided with elastic device with the extension secure bond and the between of snap-action and auxiliary device, just can improve vibration-isolating effect with reduction by vibrating the noise that is produced.

Claims

1. the timing belt cover supporting structure of a covering engine Timing Belt comprises:

By making the outstanding extension that forms of a part that is arranged in the timing belt cover and is installed in the auxiliary device housing on the engine body, it is characterized in that the extension of described housing is to insert in the through hole that roughly is arranged on the timing belt cover middle body also to stretch out so that described extension combines with described through hole outwardly.

2. timing belt cover supporting structure as claimed in claim 1 is characterized in that, described auxiliary device is a water pump.

3. timing belt cover supporting structure as claimed in claim 2 is characterized in that, described water pump live axle is to insert described extension and stretch out timing belt cover.

4. as each described timing belt cover supporting structure of claim 1 to 3, it is characterized in that the extension of described housing and the through hole of timing belt cover mutually combine by E shape ring.

5. as each described timing belt cover supporting structure of claim 1 to 3, it is characterized in that the claw that forms mutually combines on slot part that forms on the extension of described housing and the through hole at timing belt cover.

6. timing belt cover supporting structure as claimed in claim 1, it is characterized in that, it is characterized in that, also comprise the elastic device of the noise that the biting hook that combines with the extension of auxiliary device with snap-action at least three edges that are arranged on throughhole portions and preventing between timing belt cover and auxiliary device are produced by vibration.