CN205025519U

CN205025519U - Engine chain drive

Info

Publication number: CN205025519U
Application number: CN201520803192.XU
Authority: CN
Inventors: 毛平安; 黄第云
Original assignee: Guangxi Yuchai Machinery Co Ltd
Current assignee: Guangxi Yuchai Machinery Co Ltd
Priority date: 2015-10-15
Filing date: 2015-10-15
Publication date: 2016-02-10
Anticipated expiration: 2025-10-15

Abstract

The utility model discloses an engine chain drive, it includes: the crankshaft sprocket, the camshaft head sprocket, its through timing chain with the crankshaft sprocket is connected, and straining device, it is used for the adjustment timing chain's degree of relaxation, wherein, "Cushion" has been laid to crankshaft sprocket and camshaft head sprocket around the root of sprocket. The utility model discloses an impact that produces because of the shake when "Cushion" can reduce timing chain and crankshaft sprocket and camshaft head sprocket greatly and meshes to reduce vibration and noise that the transmission in -process produced, and alleviate the wearing and tearing of sprocket and chain, improve life.

Description

Engine chain driving mechanism

Technical field

The utility model relates to drive mechanism field, particularly a kind of engine chain driving mechanism.

Background technique

The bent axle of motor and camshaft generally realize high speed transmission by chain drive or gear drive.When the wheelbase of bent axle and camshaft is arranged far away, the general chain drive that adopts carries out transmission, and it is relatively simple for structure, arranges more for convenience.But, chain can produce lax and shake in the process of transmission, although existing chain drive can carry out the slackness of adjusting chain by tensioning mechanism, but chain cannot be avoided to produce shake, therefore in transmission process, can collide because shaking and produce larger vibration and noise when chain and sprocket engagement, and the wearing and tearing of easily aggravation sprocket wheel and chain, affect working life.

The information being disclosed in this background technique part is only intended to increase the understanding to general background of the present utility model, and should not be regarded as admitting or imply in any form that this information structure has been prior art that persons skilled in the art are known.

Model utility content

The purpose of this utility model is to provide a kind of engine chain driving mechanism, thus can collide because shaking and produce larger vibration and noise and aggravate the shortcoming of the wearing and tearing of sprocket wheel and chain when overcoming chain and the sprocket engagement of existing engine chain driving mechanism.

For achieving the above object, the utility model provides a kind of engine chain driving mechanism, and it comprises: crankshaft sprocket; Camshaft main chain wheel; It is connected with described crankshaft sprocket by timing chain; And tensioning mechanism, it is for adjusting the slackness of described timing chain; Wherein, described crankshaft sprocket and camshaft main chain wheel are equipped with padded coaming in the surrounding of the root of sprocket.

Preferably, in technique scheme, described padded coaming is rubber.

Preferably, in technique scheme, described rubber is layed on described crankshaft sprocket and camshaft main chain wheel by the mode of sulfuration.

Preferably, in technique scheme, described tensioning mechanism comprises: tension arms, and its one end is articulated with on body, and this tension arms is corresponding with the side of described timing chain; This tension arms is arranged with first groove for guiding described timing chain; And chain tensioning device, it swings to compress described timing chain to described timing chain for promoting described tension arms.

Preferably, in technique scheme, in described first groove, be equipped with padded coaming.

Preferably, in technique scheme, this chain drive also comprises a guide rail corresponding with the opposite side of described timing chain, and this guide rail is arranged with second groove for guiding described timing chain.

Preferably, in technique scheme, in described second groove, be equipped with padded coaming.

Compared with prior art, the utility model has following beneficial effect:

1, the utility model by arranging the striking force that padded coaming can reduce to produce because of shake when timing chain engages with crankshaft sprocket and camshaft main chain wheel greatly around the root of sprocket wheel, thus the vibration & noise produced in reduction transmission process, and alleviate the wearing and tearing of sprocket wheel and chain, improve working life.

2, the first groove on tension arms of the present utility model and the second groove on guide rail are provided with padded coaming, thus can reduce the vibration & noise produced in transmission process and the wearing and tearing alleviating chain further further.

Accompanying drawing explanation

Fig. 1 is the structural representation according to the utility model engine chain driving mechanism.

Fig. 2 is the axial sectional view according to crankshaft sprocket of the present utility model.

Fig. 3 is the axial sectional view according to camshaft main chain wheel of the present utility model.

Fig. 4 is the structural representation according to tension arms of the present utility model.

Fig. 5 is the structural representation according to guide rail of the present utility model.

Main Reference Numerals illustrates:

1-crankshaft sprocket, 2-camshaft sprocket, 3-timing chain, 4-padded coaming, 5-tension arms, 6-chain tensioning device, 7-guide rail.

Embodiment

Below in conjunction with accompanying drawing, embodiment of the present utility model is described in detail, but is to be understood that protection domain of the present utility model not by the restriction of embodiment.

Clearly represent unless otherwise other, otherwise in whole specification and claims, term " comprise " or its conversion as " comprising " or " including " etc. by be understood to include the element of stating or constituent element, and do not get rid of other element or other constituent element.

Fig. 1 Fig. 5 shows the engine chain driving mechanism according to the novel preferred implementation of the utility model, and it comprises crankshaft sprocket 1, camshaft main chain wheel 2, timing chain 3 and tensioning mechanism.

As shown in Figure 1, crankshaft sprocket 1 is connected with engine crankshaft, and camshaft main chain wheel 2 is connected with engine cam, and camshaft sprocket 2 is connected with crankshaft sprocket 1 by timing chain 3.Tensioning mechanism for adjusting the slackness of timing chain 3, thus makes timing chain 3 be in tensioning state.

As shown in Figures 2 and 3, crankshaft sprocket 1 and camshaft main chain wheel 2 are equipped with padded coaming 4 in the surrounding of the root of sprocket.Preferably, the padded coaming 4 that the surrounding of the root of sprocket lays is rubber.Further preferably, rubber is layed in crankshaft sprocket 1 with on camshaft main chain wheel 2 by the mode of sulfuration.The utility model by arranging padded coaming 4 around the root of the sprocket of two sprocket wheels, greatly can reduce the striking force produced because of shake when timing chain 3 engages with crankshaft sprocket 1 and camshaft main chain wheel 2, thus the vibration & noise produced in reduction transmission process, and alleviate the wearing and tearing of sprocket wheel and chain, improve working life.The thickness of padded coaming 4 and width are optimized design according to the motor of different model, with the effect making it fully can play buffer shock-absorbing, reasonably controlling again the weight increased because laying padded coaming 4, avoiding the performance and the increase cost that affect motor.

As shown in Figure 1, tensioning mechanism comprises tension arms 5 and chain tensioning device 6, and one end of tension arms 5 is articulated with on body, and tension arms 5 is corresponding with the side of timing chain 3, tension arms 5 is arranged with first groove for guiding timing chain 3, the curved shape of the first groove.Chain tensioning device 6 is corresponding with the other end of tension arms 5, and it can promote tension arms 5 and swing to the direction at timing chain 3 place, thus by the first groove extruding timing chain 3, is in tensioning state to make timing chain 3.Preferably, as shown in Figure 4, be equipped with padded coaming 4 in the first groove of tension arms 5, when timing chain 3 moves in the first groove, padded coaming 4 can play the effect of buffer shock-absorbing, thus reduces noise and vibration.

As shown in Figure 1, engine chain driving mechanism of the present utility model also comprises a guide rail 7 corresponding with the opposite side of timing chain 3, and guide rail 7 is arranged with second groove for guiding timing chain 3.Preferably, as shown in Figure 5, in the second groove of guide rail 7, be equipped with padded coaming 4 equally, to play the effect of buffer shock-absorbing, reduce noise and vibration.Padded coaming 4 in first groove and the second groove can be nylon, rubber or other composite materials.And the utility model is guided by tension arms 5 and guide rail 7 pairs of timing chains 3, effectively can reduce the shake that timing chain 3 produces in transmission process.

The aforementioned description to concrete exemplary of the present utility model is to illustrate and the object of illustration.These descriptions not want the utility model to be defined as disclosed precise forms, and obviously, according to above-mentioned instruction, can much change and change.The object selected exemplary embodiment and describe is to explain certain principles of the present utility model and practical application thereof, thus those skilled in the art can be realized and utilize various different exemplary of the present utility model and various different selection and change.Scope of the present utility model is intended to limited by claims and equivalents thereof.

Claims

1. an engine chain driving mechanism, it comprises:

Crankshaft sprocket;

Camshaft main chain wheel; It is connected with described crankshaft sprocket by timing chain; And

Tensioning mechanism, it is for adjusting the slackness of described timing chain; It is characterized in that,

Described crankshaft sprocket and camshaft main chain wheel are equipped with padded coaming in the surrounding of the root of sprocket.

2. engine chain driving mechanism according to claim 1, is characterized in that, described padded coaming is rubber.

3. engine chain driving mechanism according to claim 2, is characterized in that, described rubber is layed on described crankshaft sprocket and camshaft main chain wheel by the mode of sulfuration.

4. engine chain driving mechanism according to claim 1, is characterized in that, described tensioning mechanism comprises:

Tension arms, its one end is articulated with on body, and this tension arms is corresponding with the side of described timing chain; This tension arms is arranged with first groove for guiding described timing chain; And

Chain tensioning device, it swings to described timing chain for promoting described tension arms, to compress described timing chain.

5. engine chain driving mechanism according to claim 4, is characterized in that, is equipped with padded coaming in described first groove.

6. engine chain driving mechanism according to claim 1, is characterized in that, this chain drive also comprises a guide rail corresponding with the opposite side of described timing chain, and this guide rail is arranged with second groove for guiding described timing chain.

7. engine chain driving mechanism according to claim 6, is characterized in that, is equipped with padded coaming in described second groove.