CN205503205U - Low noise car cam - Google Patents

Abstract

The utility model provides a low noise car cam belongs to the automobile engine field, including the cam and the camshaft that link to each other, this kind of low noise car cam improves its cam parameter, through the molded lines that changes the cam, improves the height of cam buffer segment, forces when carrying out highly sudden change with cam contact's a very section of thick bamboo from the base circle to the lift, has the sufficient time will endure a section of thick bamboo and falls into the cam buffer segment, reduces sudden change impulsive force and engine cylinder block heat engine deformation clearance to the engine noise has been reduced. According to the cam of above -mentioned scheme production, through experimental verification, the abnormal sound that former engine is aroused has been solved by the cam.

Description

Low-noise automobile cam

Technical field

This utility model relates to automotive engine applications, in particular to a kind of low-noise automobile cam.

Background technology

At present, China's China Automobile Industry is rapid, and automobile sales volume climbs up and up, and consumer is to car noise, abnormal sound requirement More and more higher, particularly consumer is higher to the noise requirements of automobile engine, and slightly abnormal sound will cause Customer Complaint, so The operation abnormal sound reducing electromotor from design is compeled as pressing as a fire singeing one's eyebrows.Each automobile engine manufacturer is all devoted to study each fortune of electromotor The moving law of dynamic component and state are to reduce noise and abnormal sound.

Utility model content

This utility model provides a kind of low-noise automobile cam, it is intended to solve the problems referred to above.

This utility model is achieved in that

Low-noise automobile cam, including the cam being connected and camshaft, during described camshaft rotates a circle, cam Lift such as following table:

Alternatively, described cam has 2.

Alternatively, described cam has 3-8.

Alternatively, multiple described cams are spaced setting along the axis direction of camshaft.

Preferably, described cam has 8.

The beneficial effects of the utility model are: the low-noise automobile cam that this utility model is obtained by above-mentioned design, logical Cross above-mentioned parameter and change the molded line of cam, improve the height of cam breeze way, force the very cylinder with cam contact from basic circle to liter When journey enters line height sudden change, there is time enough very will fall into cam breeze way by cylinder, reduce sudden change impulse force and engine cylinder body heat Machine deformation gap, thus reduce engine noise.The cam produced by such scheme, by experimental verification, solves primary The abnormal sound that motivation is caused by cam.

Accompanying drawing explanation

In order to be illustrated more clearly that the technical scheme of this utility model embodiment, below will be to required in embodiment The accompanying drawing used is briefly described, it will be appreciated that the following drawings illustrate only some embodiment of the present utility model, the most not Should be considered as the restriction to scope, for those of ordinary skill in the art, on the premise of not paying creative work, Other relevant accompanying drawings can also be obtained according to these accompanying drawings.

Fig. 1 is the front view of the low-noise automobile cam that this utility model embodiment provides；

Fig. 2 is the structural representation of the low-noise automobile cam cam that this utility model embodiment provides.

Figure acceptance of the bid note is respectively as follows:

Cam 101；Camshaft 102.

Detailed description of the invention

For making the purpose of this utility model embodiment, technical scheme and advantage clearer, below in conjunction with this practicality Accompanying drawing in novel embodiment, is clearly and completely described the technical scheme in this utility model embodiment, aobvious So, described embodiment is a part of embodiment of this utility model rather than whole embodiments.Based on this practicality Embodiment in novel, it is every other that those of ordinary skill in the art are obtained under not making creative work premise Embodiment, broadly falls into the scope of this utility model protection.Therefore, below to the enforcement of the present utility model provided in the accompanying drawings The detailed description of mode is not intended to limit claimed scope of the present utility model, but is merely representative of of the present utility model Selected embodiment.Based on the embodiment in this utility model, those of ordinary skill in the art are not making creative labor The every other embodiment obtained under dynamic premise, broadly falls into the scope of this utility model protection.

In description of the present utility model, it is to be understood that term " " center ", " longitudinally ", " laterally ", " length ", " width Degree ", " thickness ", " on ", D score, "front", "rear", "left", "right", " vertically ", " level ", " top ", " end ", " interior ", " outward ", " clockwise ", " counterclockwise " etc. instruction orientation or position relationship be based on orientation shown in the drawings or position relationship, be only for It is easy to describe this utility model and simplifying describe rather than instruction or the equipment of hint indication or element must have specifically Orientation, with specific azimuth configuration and operation, therefore it is not intended that to restriction of the present utility model.

Additionally, term " first ", " second " are only used for describing purpose, and it is not intended that instruction or hint relative importance Or the implicit quantity indicating indicated technical characteristic.Thus, define " first ", the feature of " second " can express or Implicitly include one or more this feature.In description of the present utility model, " multiple " are meant that two or two Above, unless otherwise expressly limited specifically.

In this utility model, unless otherwise clearly defined and limited, term " install ", " being connected ", " connection ", " Gu Fixed " etc. term should be interpreted broadly, connect for example, it may be fixing, it is also possible to be to removably connect, or integral；Can be It is mechanically connected, it is also possible to be electrical connection；Can be to be joined directly together, it is also possible to be indirectly connected to by intermediary, can be two The connection of element internal or the interaction relationship of two elements.For the ordinary skill in the art, can basis Concrete condition understands above-mentioned term concrete meaning in this utility model.

In this utility model, unless otherwise clearly defined and limited, fisrt feature second feature it " on " or it D score can include that the first and second features directly contact, it is also possible to includes that the first and second features are not directly contact but logical Cross the other characterisation contact between them.And, fisrt feature second feature " on ", " top " and " above " include One feature is directly over second feature and oblique upper, or is merely representative of fisrt feature level height higher than second feature.First is special Levy second feature " under ", " lower section " and " below " include fisrt feature immediately below second feature and obliquely downward, or only Represent that fisrt feature level height is less than second feature.

Refer to Fig. 1 and Fig. 2

The low-noise automobile cam that present embodiment provides, including the cam 101 being connected and camshaft 102, described cam During axle 102 rotates a circle, the lift of cam 101 such as following table:

In form, the unit degree of being of angle, the unit of lift range value is millimeter.This low-noise automobile cam is preferably 1.5L。

In existing, test after camshaft is loaded onto electromotor, before improvement, have the electromotor of 50% to have abnormal sound, abnormal sound to exist Just having during idling, be accelerated, abnormal sound is increasing.During idling, (engine speed 700-800 rev/min) abnormal sound frequency is about 6 Secondary/second, engine speed 2000 revs/min, abnormal sound frequency improves, and about 16 times/second, when rotating speed improves again, abnormal sound is formed for A kind of real-time noise, ear can not differentiate frequency.

This low-noise automobile cam that present embodiment provides, changes the molded line of cam 101 by above-mentioned parameter, improves The height of cam 101 breeze way, when forcing the very cylinder contacted with cam 101 highly to suddenly change from basic circle to lift, has enough Time very will fall into cam 101 breeze way by cylinder, reduce sudden change impulse force and engine cylinder heat engine body deformation gap, thus reduce Engine noise.The cam 101 produced by such scheme, by experimental verification, solves what primary motivation was caused by cam 101 Abnormal sound.

Specifically, cam 101 has 2.Use requirement is disclosure satisfy that in the case of 2 cams 101.Or, cam 101 has 3-8.3-8 cam 101 cooperates and can preferably work.When cam 101 has multiple, multiple cam 101 is along cam The axis direction interval of axle 102 is arranged.In some preferred embodiments, cam has 8.

The foregoing is only preferred implementation of the present utility model, be not limited to this utility model, for For those skilled in the art, this utility model can have various modifications and variations.All in spirit of the present utility model with former Within then, any modification, equivalent substitution and improvement etc. made, within should be included in protection domain of the present utility model.

Claims (5)

1. low-noise automobile cam, it is characterised in that include cam and the camshaft being connected, the mistake that described camshaft rotates a circle Cheng Zhong, the lift of cam such as following table:

。

Low-noise automobile cam the most according to claim 1, it is characterised in that described cam has 2.

Low-noise automobile cam the most according to claim 1, it is characterised in that described cam has 3-8.

Low-noise automobile cam the most according to claim 3, it is characterised in that multiple described cams are along the axis of camshaft Interval, direction is arranged.

Low-noise automobile cam the most according to claim 1, it is characterised in that described cam has 8.