CN106907268A

CN106907268A - A kind of timing shell for engine

Info

Publication number: CN106907268A
Application number: CN201710294061.7A
Authority: CN
Inventors: 王波; 梁伟龙; 丁艳平; 杨少波; 莫翔; 乔守政
Original assignee: Chongqing Changan Automobile Co Ltd
Current assignee: Chongqing Changan Automobile Co Ltd
Priority date: 2017-04-28
Filing date: 2017-04-28
Publication date: 2017-06-30

Abstract

The present invention discloses a kind of timing shell for engine, including preceding timing shell and rear timing shell, the rear timing shell is detachably connected with engine cylinder-body, the preceding timing shell is detachably connected with rear timing shell, and the preceding timing shell is provided with right suspension for engine breach, timing belt pulley installing port and, tensioning wheel projection raised with engine VTT and the raised corresponding groove of idle pulley；The preceding timing shell is provided with sound-absorbing material with motor mechanism into the part of cavity；The preceding timing shell and rear timing shell are plastic material.The problem that noise is empathized in the cavity of timing shell is which solved, while having certain rigidity, belt timing driving system can be effectively protected.

Description

A kind of timing shell for engine

Technical field

The present invention relates to engine manufacturing technology field, and in particular to a kind of timing shell for engine.

Background technology

Automobile is commonly used in society now, and country has put into effect a series of laws and measures and carried out making an uproar for restricting vehicle Sound level, while the noiseproof feature of automobile severely impacts general impression and evaluation of the customer to automobile.

Automobile engine is the main source of automobile noise, and timing wheel train noise is used as a noise source of engine Paid close attention to by researcher.For the engine timing system using the dry-type belt kind of drive, belt is easily subject to cam Axle and bent axle excitation influence, cause belt occur extensional vibration and oscillation crosswise so that belt back clash into idle pulley surface or Tensioning wheel surface, forms timing wheel train noise.Existing Timing Belt case is mostly plastic shell, and plastic shell is arranged on hair On motivation front end, cavity is formd.Now, the noise that timing wheel train is produced is easy to by Timing Belt case cavity acoustic mode Coupled resonance amplifies, and produces cavity resonance sound, has a strong impact on the sound quality of engine.Therefore, it is badly in need of a kind of new hair of exploitation Motivation timing shell, it is to avoid produce cavity resonance sound.

The content of the invention

It is an object of the invention to provide a kind of timing shell for engine, sky of the noise in timing shell is which solved The problem empathized in chamber, while having certain rigidity, can effectively protect belt timing driving system.

Timing shell for engine of the present invention, a kind of timing shell for engine, including preceding timing Case and rear timing shell, the rear timing shell are detachably connected with engine cylinder-body, the preceding timing shell and rear timing Case is detachably connected, the preceding timing shell be provided with right suspension for engine breach, timing belt pulley installing port and with start Machine VTT is raised, tensioning wheel is raised and the raised corresponding groove of idle pulley；The preceding timing shell and motor mechanism into the part of cavity It is provided with sound-absorbing material；The preceding timing shell and rear timing shell are plastic material.

Further, the sound-absorbing material is arranged on planar section in the middle part of preceding timing shell and right with engine VTT projections In the groove answered.

Further, the rear timing shell and engine cylinder-body bolt connection, the preceding timing shell and rear timing shell Bolt connection, is embedded in metal insert in bolt mounting holes.Prevent the timing shell of the pretightning force pressure break plastic material of bolt And reduce abrasion of the dismounting timing shell to connecting hole repeatedly.

Further, the preceding timing shell is divided into upper encloser and lower encioser, upper and lower case with right suspension for engine breach circle Overlap joint is integrated.Assembling is more convenient, accurate, and the installing space that right suspension for engine mounting portion reserves is smaller, more favorably In the dust-proof and noise reduction of timing shell.

Further, the sound-absorbing material is shaping felt.

Further, the preceding timing shell edge is provided with several for coordinating the installation being detachably connected with rear timing shell Journal stirrup.

Further, the rear timing shell space is provided with reinforcement, and the reinforcement installation site is according to real work need Selected, for the rigidity of timing shell after increase, the vibration of timing shell after reduction.The rear timing shell is provided with Inlet and outlet phaser assembly installing port, idle pulley installing port and stretching wheel assembly installing port.

The beneficial effects of the invention are as follows：Using the timing shell of said structure, with engine cylinder-body structure in timing shell Planar section into cavity sets sound-absorbing material, and the noise that Timing Belt oscillation crosswise and twisting vibration are produced can be inhaled Receive and transmit, farthest reduce timing shell internal face to sonic reflection of making an uproar, while ensure that timing shell rigidity and Sealing, effectively prevents dust, foreign matter from entering timing wheel train, reduces the timing shell outside radiated noise of resonance.

Brief description of the drawings

Fig. 1 is the structural representation of timing shell upper encloser before the present invention；

Fig. 2 is the structural representation of timing shell lower encioser before the present invention；

Fig. 3 is the assembling schematic diagram of timing shell before the present invention；

Fig. 4 is the structural representation of timing shell after the present invention；

Fig. 5 is timing shell of the present invention and existing timing shell noise effects comparison diagram.

In figure, 1-preceding timing shell, 2-rear timing shell, 3-sound-absorbing material, 4-journal stirrup, 5-engine right are installed Suspension breach, 6-mounting hole, 7-timing belt pulley installing port, 8-inlet and outlet phaser assembly installing port, 9-idle pulley is installed Mouthful, 10-stretching wheel assembly installing port, 11-upper encloser, 12-lower encioser.

Specific embodiment

The invention will be further described below in conjunction with the accompanying drawings.

Referring to the timing shell for engine shown in Fig. 1 to Fig. 4, including preceding timing shell 1 and rear timing shell 2, The preceding timing shell 1 and rear timing shell 2 are plastic material.The rear timing shell 2 and engine cylinder-body bolt connection, institute Preceding timing shell 1 and the bolt connection of rear timing shell 2 are stated, metal insert is embedded in bolt mounting holes, prevent the pre- of bolt The timing shell of clamp force pressure break plastic material and reduction abrasion of the dismounting timing shell to connecting hole repeatedly.The preceding timing cover It is raised and lazy that shell 1 is provided with right suspension for engine breach 5, timing belt pulley installing port 7 and, tensioning wheel raised with engine VTT Take turns raised corresponding groove.Suction is provided with the planar section at the middle part of preceding timing shell 1 and groove corresponding with engine VTT projections Sound material 3.

The sound-absorbing material 3 is shaping felt.The shaping felt is combined with plastic material with the technique being molded.Shaping felt With preferable sound absorption characteristics, but shaping felt rigidity is small, by be susceptible in the case of external force deformation.The rigidity of plastic material compared with Greatly, tensile strength and bending strength are higher, can support shaping felt, prevent shaping felt compressive deformation.

Diameter because of right suspension for engine expenditure section diameter more than timing shell mounting portion, the preceding timing shell 1 Upper encloser 11 and lower encioser 12 are divided into the boundary of right suspension for engine breach 5, upper and lower case overlap joint is integrated.Assembling more facilitate, Accurately, and the installing space that reserves of right suspension for engine mounting portion is smaller, it is more beneficial for the dust-proof and noise reduction of timing shell.Institute State the edge of preceding timing shell 1 and be provided with several installation journal stirrups for being connected with the fitted bolt of rear timing shell 2.The rear timing cover The space of shell 2 is provided with reinforcement, and the reinforcement installation site needs to be selected according to real work, for timing cover after increase The rigidity of shell 2, the vibration of timing shell 2 after reduction.The rear timing shell be provided with inlet and outlet phaser assembly installing port 8, Idle pulley installing port 9 and stretching wheel assembly installing port 10, it is corresponding with various engine components position respectively, it is ensured that engine is just Often work, effectively protects belt timing driving system.

The sound-absorbing material 3 of upper encloser 11 of the preceding timing shell 1 is nearby provided with mounting hole 6, for the spiral shell of rear timing shell 2 Tether and connect, when preceding timing shell 1 passes through mounting hole 6 with rear 2 bolt connection of timing shell, screw rod between the two is externally provided with lining Set, it is ensured that preceding timing shell 1 and rear timing shell 2 have certain rigidity after connecting so that timing shell is connected and more steps up It is close, further strengthen the noise reduction of timing shell.

During assembling, first by rear timing shell 2 and engine cylinder-body bolt connection, then by the lower encioser of preceding timing shell 1 12 with the bolt connection of rear timing shell 2, then the upper encloser 11 of preceding timing shell 1 and the lower encioser 12 are overlapped, so Afterwards by upper encloser 11 by mounting hole 6 and the bolt connection of rear timing shell 12, finally with bolt by installing journal stirrup 4 by preceding timing Case 1 is fixedly connected with rear timing shell 2, and assembling is completed.

Shown in Figure 5, the region between 600Hz to 750Hz, the noise amplitude of comparative example is significantly greater than embodiment Noise amplitude, comparative example is existing timing shell, and embodiment is timing shell of the present invention.Timing shell of the invention effectively weakens Noise between 600Hz to 750Hz, while effectively prevent the dust, foreign matter from entering timing wheel train, to Timing Belt oscillation crosswise The noise produced with twisting vibration carries out absorption and transmission, farthest reduces timing shell internal face to sonic reflection of making an uproar, Reduce the timing shell outside radiated noise of resonance simultaneously.

Claims

1. a kind of timing shell for engine, including preceding timing shell（1）With rear timing shell（2）, the rear timing cover Shell is detachably connected with engine cylinder-body, and the preceding timing shell is detachably connected with rear timing shell, it is characterised in that：It is described Preceding timing shell is provided with right suspension for engine breach（5）, timing belt pulley installing port（7）And, tensioning raised with engine VTT The raised groove corresponding with idle pulley projection of wheel；

The preceding timing shell（1）With motor mechanism sound-absorbing material is provided with into the part of cavity（3）；

The preceding timing shell（1）With rear timing shell（2）It is plastic material.

2. the timing shell for engine according to claim 1, it is characterised in that：The sound-absorbing material（3）Set In preceding timing shell（1）In the planar section at middle part and groove corresponding with engine VTT projections.

3. the timing shell for engine according to claim 1, it is characterised in that：The rear timing shell（2）With Engine cylinder-body bolt connection, the preceding timing shell（1）With rear timing shell bolt connection, it is embedded in bolt mounting holes Metal insert.

4. the timing shell for engine according to claim 1 and 2, it is characterised in that：The preceding timing shell（1） With right suspension for engine breach（5）Boundary is divided into upper encloser（11）And lower encioser（12）, upper and lower case overlap joint is integrated.

5. the timing shell for engine according to claim 1 and 2, it is characterised in that：The sound-absorbing material（3）For Shaping felt.

6. the timing shell for engine according to claim 1 and 2, it is characterised in that：The preceding timing shell（1） Edge be provided with it is several for rear timing shell（2）The installation journal stirrup that cooperation is detachably connected.

7. the timing shell for engine according to claim 1 and 2, it is characterised in that：The rear timing shell（2） Space is provided with reinforcement, and the rear timing shell is provided with inlet and outlet phaser assembly installing port（8）, idle pulley installing port（9）With Stretching wheel assembly installing port（10）.