CN205639541U - Gearbox helical gear for car - Google Patents

Abstract

The utility model discloses a gearbox helical gear for car, including the hollow cylinder body, hollow cylinder body surface is equipped with forging and pressing integrated into one piece's skewed tooth tooth, this internal round surface of hollow cylinder is equipped with limiting convex ring, the skewed tooth tooth surface is opened there is the contacting line. The device simple structure, reasonable in design, the meshing line length, work is steady, and the noise is less, has very strong market spreading value.

Description

A kind of transmission case of automobile helical gear

Technical field

This utility model relates to helical gear technical field, is specially a kind of transmission case of automobile helical gear.

Background technology

Automobile gearbox is frequently referred to change speed gear box in the car, is frequently referred to " variable-speed motor ", is in industrial machinery Carry out the mechanically or hydraulically equipment of machine power conversion.Variator be car transmissions mainly comprise it One.The actually used situation of automobile is extremely complex, as starting, idling stop, low speed or run at high speed, Accelerating, slow down, climb and reversing etc., this driving force just requiring automobile and speed can be at sizable models Enclose interior change, and the output torque of the most widely used piston-mode motor and rotation speed change scope are less. In order to adapt to the driving conditions often changed, make electromotor (power is higher, oily under favourable operating mode simultaneously Consume relatively low) work, drive system is provided with variator.Each gear has different drive ratios, quite Different rotating speeds can be produced in little gear from the engagement of gear wheel, when running at a low speed with underneath drive ratio (3 grades and Below), big axle rotating speed is less than engine speed, according to formula P=FV, can obtain bigger driving force, high With high transmission ratio (4 grades and more than) during speed, big axle rotating speed is higher than engine speed, reduces pull strength and obtains more At high speed, cutting gear i.e. selects the gear of various sizes of gear and big axle to engage.

There is tooth can engage the mechanical organ of transmitting movement and power continuously on wheel rim.Gear is to intermesh The machine components having tooth, gear application in transmission occurs in that very early.In 19 end of the centurys, generated is cut The principle of tooth method and utilize the special purpose machine tool of this principle cutting and the appearance in succession of cutter, along with sending out of producing Exhibition, the stationarity of gear operation comes into one's own.Gear is the mutually engageable machine components having tooth, it Application in machine driving and whole mechanical field is the most extensive.Modern Gear technology reaches: gear Modulus 0.004-100 millimeter；Gear diameter is by 1 millimeter-150 meters；Transmission power is up to upper 100,000 kilowatts； Rotating speed is up to hundreds of thousands rev/min；The highest peripheral speed reaches 300 meter per seconds.China Gear industry is quickly sent out Exhibition, industry size constantly expands.The Eleventh Five-Year Plan period, the data announced according to State Statistics Bureau, The total industrial output value of 2005-2010 China Gear industry increases year by year, and on year-on-year basis amplification all 18.00% Above, within 2009, realize total industrial output value 781.85 hundred million yuan, within 2010, realize total industrial output value 946.35 Hundreds of millions yuan.Gear industry has become industry largest in China's mechanical basic part.

Helical gear is not exclusively helical gear, it should say, helical gear is two helical gear engagement systems, Distinguished in the direction difference of space transmission power by them.Common spur gear simultaneously enters engagement along the facewidth, Thus producing impact shock noise, transmission is unstable.

Not having position limiting convex ring on existing general helical gear inner ring, on helical gear inner ring, grafting bearing is also Using packing ring to come to the outer ring of bearing spacing, packing ring easily shifts, and causes bearing spacing inaccurate, thus Causing helical gear easily to wear and tear, service life is short.

Utility model content

The purpose of this utility model is to provide a kind of transmission case of automobile helical gear, to solve above-mentioned background The problem proposed in technology.

For achieving the above object, this utility model provides following technical scheme: a kind of transmission case of automobile is oblique Gear, including hollow cylinder body, described hollow cylinder body surface is provided with the integrated helical teeth of forging and stamping Tooth, described hollow cylinder body internal circular surfaces is provided with position limiting convex ring, and described helical teeth tooth surface has path of contact.

Preferably, described hollow cylinder body and position limiting convex ring are integral type structure.

Preferably, the spiral angle of described helical teeth tooth is degree, and helical teeth tooth is no less than 30 groups.

Preferably, between described helical teeth tooth, spacing is 0.5 millimeter.

Compared with prior art, the beneficial effects of the utility model are: this transmission case of automobile helical gear, Helical teeth tooth is set to 30 groups, and operationally registration is big, and the number of teeth the most simultaneously worked is many, reduces every The load of team's gear, thus improve the bearing capacity of gear, and helical teeth tooth size is little, the most not Yi Genqie, helical teeth tooth is one-body molded for forging and stamping, saves material and time, improves the precision of gear simultaneously, Make it can realize precision-fit in use, be provided with position limiting convex ring on inner cylinder surface simultaneously, it is possible to be tight Close is spacing by bearing, makes gear to get loose.

Accompanying drawing explanation

Fig. 1 is this utility model structural representation；

Fig. 2 is this utility model left view；

Fig. 3 is this utility model top view；

Fig. 4 is this utility model side view.

In figure: 1 hollow cylinder body, 2 helical teeth teeth, 3 position limiting convex rings, 4 path of contacts.

Detailed description of the invention

Below in conjunction with the accompanying drawing in this utility model embodiment, to the technology in this utility model embodiment Scheme is clearly and completely described, it is clear that described embodiment is only this utility model one Divide embodiment rather than whole embodiments.Based on the embodiment in this utility model, this area is common The every other embodiment that technical staff is obtained under not making creative work premise, broadly falls into this The scope of utility model protection.

Referring to Fig. 1-4, this utility model provides a kind of technical scheme: a kind of transmission case of automobile helical gear, Including hollow cylinder body 1, described hollow cylinder body 1 surface is provided with the integrated helical teeth tooth 2 of forging and stamping, Described hollow cylinder body 1 internal circular surfaces is provided with position limiting convex ring 3, and described helical teeth tooth 2 surface has path of contact 4.Described hollow cylinder body 1 is integral type structure with position limiting convex ring 3.The helical angle of described helical teeth tooth 2 Degree is 9 degree, and helical teeth tooth 2 is no less than 30 groups.Described helical teeth tooth 2 between cog spacing is 0.5 millimeter.

Operation principle: at 30 groups of helical teeth teeth 2 of hollow cylinder body 1 surface configuration, it is possible to make helical gear exist During work, registration is big, and the number of teeth the most simultaneously worked is many, reduces the load of every group of gear, thus improves The bearing capacity of gear, and helical teeth tooth 2 volume is little, number is many, be difficult to root when helical gear works and cut, Helical teeth tooth 2 uses forging and stamping one-shaping technique, is saving material and is improve helical gear while the time Precision so that it is precision-fit can be realized in use, path of contact 4 can make helical teeth tooth 2 operationally with Corresponding gear tooth tightly engages.This apparatus structure is simple, reasonable in design, in use by Gradually engaging, engage line length, thus tend to be steady when being allowed to work, noise is less.

Embodiment the most of the present utility model, for the ordinary skill people of this area For Yuan, it is possible to understand that can be real to these in the case of without departing from principle of the present utility model and spirit Executing example to carry out multiple change, revise, replace and modification, scope of the present utility model is by claims And equivalent limits.

Claims (4)

1. a transmission case of automobile helical gear, including hollow cylinder body (1), it is characterised in that: institute Stating hollow cylinder body (1) surface and be provided with the integrated helical teeth tooth (2) of forging and stamping, described hollow cylinder is originally Body (1) internal circular surfaces is provided with position limiting convex ring (3), and described helical teeth tooth (2) surface has path of contact (4).

A kind of transmission case of automobile helical gear the most according to claim 1, it is characterised in that: described Hollow cylinder body (1) and position limiting convex ring (3) are integral type structure.

A kind of transmission case of automobile helical gear the most according to claim 1, it is characterised in that: described The spiral angle of helical teeth tooth (2) is 9 degree, and helical teeth tooth (2) is no less than 30 groups.

A kind of transmission case of automobile helical gear the most according to claim 1, it is characterised in that: described Helical teeth tooth (2) between cog spacing is 0.5 millimeter.