CN2642564Y

CN2642564Y - Heavy-duty automobile transmission

Info

Publication number: CN2642564Y
Application number: CN 03280500
Authority: CN
Inventors: 王琼; 陈明业; 刘阳委; 林茂; 梁明强; 李梅芳
Original assignee: HAINAN YUCHAI MACHINERY CO Ltd
Current assignee: HAINAN YUCHAI MACHINERY CO Ltd
Priority date: 2003-09-12
Filing date: 2003-09-12
Publication date: 2004-09-22
Anticipated expiration: 2013-09-12

Abstract

The utility model discloses a gearbox for a heavy car. A principal axis 3 of main box of the car gearbox with a double intermediate shaft is provided with a synchronizer 4 of a lock ring type with a double conical surface and the both sides of the synchronizer are provided with a joint gear ring 8. The synchronizer 4 of the lock ring type with the double conical surface comprises an internal cone 11 of the synchronizer, a synchronizer cone 10 and an internal cone 9 of the synchronizer, which forms two frication conical surfaces. The gearbox for the heavy car provided by the utility model has the advantages of simple structure, convenient operation, large applicable range and be capable of shortening the shifting time for the car.

Description

A kind of heavy-duty automotive speed changer

Technical field

The utility model relates to a kind of driving device of automobile, relates in particular to a kind of heavy-duty automotive speed changer.

Background technology

At present automobile all is to adopt the lockpin-type inertia synchronizer that cone of friction is arranged on the main tank main shaft of employed change-speed box on the heavy motor vehicle especially, though realized no crash change of speed, but because the synchro of this change-speed box has only a cone of friction that friction moment is provided, so the friction moment of its generation is less, when causing shifting gears synchronization time longer, promptly gearshift is slow.

Summary of the invention

The purpose of this utility model provides a kind of heavy-duty automotive speed changer, and it is the friction moment when utilizing two cone of frictions of bipyramid face lock ring type synchro to increase automobile gear shift, to shorten synchronization time.

In order to achieve the above object, the technical scheme that the utility model adopted is: bipyramid face lock ring type synchro is housed on the main shaft of two tween drive shaft Automotive transmission main tanks, and is provided with a synchro joint gear ring in its both sides; Described bipyramid face lock ring type synchro is made up of synchro outer cone, synchromesh cone and synchro inner cone, can form two cone of frictions, 6 key engagement of 6 of the synchro outer cone singly-bounds and synchro inner cone wherein, 6 projections of synchromesh cone engage gear ring with synchro 6 holes engage; Each D Drive gear on the described main shaft, import shaft gear into and engage with synchro between the gear ring by the spline constant-mesh.

Heavy-duty automotive speed changer provided by the utility model is simple in structure, and control comfort is applied widely, the time in the time of can shortening automobile gear shift effectively.

Description of drawings

Fig. 1 is the vertical section structure figure of the utility model embodiment heavy-duty automotive speed changer.

Fig. 2 is an A part enlarged drawing embodiment illustrated in fig. 1.

The specific embodiment

In the structure shown in the figure, bipyramid face lock ring type synchro 4 is housed on the main shaft 3 of two tween drive shaft Automotive transmission main tanks, and is provided with a synchro joint gear ring 8 in its both sides; Described bipyramid face lock ring type synchro 4 is made up of synchro outer cone 11, synchromesh cone 10 and synchro inner cone 9, it can form two cone of frictions, 6 key engagement of 6 of the synchro outer cone singly-bounds and synchro inner cone wherein, 6 projections of synchromesh cone engage gear ring with synchro 6 holes engage; Each D Drive gear on the described main shaft 3, import axle 1 gear 2 into and engage with synchro and pass through the spline constant-mesh between the gear ring 8.When automobile power is sent to importing on the axle 1 of change-speed box by driving engine, power-transfer clutch, and pass on the gear 2 by invoice serration, power passes on the tween drive shaft 6 through tween drive shaft transmission gear 5, and each grade gear that drives on the tween drive shaft rotates together, rotates with each grade gear on the drive shaft 3; In the time will hanging into certain gear of automobile, handling the shifter bar transmission device moves gear shift fork 12, synchro sliding gear collar 13 is moved so that synchro outer cone 11 and synchro inner cone 9 are compressed to synchromesh cone 10, this moment is because synchromesh cone 10 and synchro inner cone 9, there is speed discrepancy between the synchro outer cone 11 and produces friction force, under the effect of friction force, projection by synchromesh cone 10 drives angle of synchro joint gear ring 8 rotations, the splined hub that synchro sliding sleeve 13 engages with synchro on the gear ring 8 realizes synchromesh, friction force on the synchromesh cone 10 disappears, and the engage a gear process is finished.

Claims

1, a kind of heavy-duty automotive speed changer is characterized in that: on the main shaft [3] of two tween drive shaft Automotive transmission main tanks bipyramid face lock ring type synchro [4] is housed, and is provided with a synchro joint gear ring [8] in its both sides; Each D Drive gear on the described main shaft [3], the gear [2] that imports axle [1] into engage with synchro between the gear ring [8] and to pass through the spline constant-mesh.

2, heavy-duty automotive speed changer according to claim 1, it is characterized in that: said bipyramid face lock ring type synchro [4] is made up of synchro outer cone [11], synchromesh cone [10] and synchro inner cone [9], 6 key engagement of 6 singly-bounds of synchro outer cone [11] and synchro inner cone [9] wherein, 6 projections of synchromesh cone [10] engage gear ring [8] with synchro 6 holes engage.