DE102006031267A1 - Gearing system for vehicles comprises an intermediate shaft for the reverse speed arranged at a determined angle to the main shaft - Google Patents

Abstract

Gearing system comprises an intermediate shaft (6) for the reverse speed arranged at a determined angle to the main shaft (5). Preferred Features: A toothed wheel (2) of the intermediate shaft for the reverse speed combs with a pinion driven on the main shaft. A further toothed wheel (2~) of the intermediate shaft combs a detachable wheel (4) arranged on a gear shaft (3).

Description

The The present invention relates to a countershaft transmission, comprising a main shaft, a countershaft and an intermediate shaft for the Reverse gear, according to the generic term of claim 1

transmission in Vorgelegebauweise, in particular for motor vehicles, include According to the prior art, a drive shaft (main shaft) and at least one in the gearbox fixedly mounted countershaft, the off-axis to the main shaft seconded. In some transmissions, the countershaft is as Output shaft formed; If this is not the case, then the Output shaft arranged coaxially to the main shaft or countershaft be. Furthermore, as a rule, to realize the intermediate passage an intermediate shaft (return shaft) intended.

in this connection have the drive shaft, the countershaft and possibly the output shaft gears on, which brought together by means of switching elements engaged can be and thereby the translation stages of the transmission. The drive shaft is usually over a Spur gear, the so-called drive constant connected to the countershaft.

From the DE 202 025 81 U1 The applicant is a gear train in countershaft design known, which has a drive shaft, an output shaft, a countershaft and an intermediate shaft for the reverse gear. In the known transmission, the countershaft is arranged coaxially with the output shaft and the drive shaft offset from the axis to the output shaft. Here, the engagement of two gears of different shafts causes each other a single translation, which can be used to generate the gear ratio, the individual ratios can be activated by means of switching elements.

Countershaft gear sets are according to the prior art with mutually parallel Waves constructed. In these wheelsets, the gear is graded on a geometric grading or in particular for passenger car transmissions via a progressive graduation calculated. Disadvantageously, within the countershaft gear set the limits of variability narrowly limited.

If For example, the interpretation of the first gear a very small and possibly not to be produced pinion requires and the interpretation of the last gear requires a very small gear driven can over the design of the constant stage, i. the drive constant, only one of the two courses Getting corrected.

Of the present invention is based on the object, a transmission in countershaft design, comprising an intermediate shaft for reverse gear, in which the design degree of freedom is increased. In particular, should by increasing the design Degree of freedom production-related disadvantages are compensated can.

These The object is solved by the features of claim 1. Further Embodiments of the invention and advantages are apparent from the dependent claims.

Therefore is a countershaft transmission, comprising a main shaft, a countershaft and an intermediate shaft for reverse gear proposed at the countershaft and the main shaft are arranged parallel to each other, the intermediate shaft for the reverse gear is arranged at a certain angle to the main shaft.

in this connection are those on the intermediate shaft for the reverse gear arranged gears as Beveloid wheels, i.e. conical and oblique interlocked, trained; one of the Beveloid wheels meshes with one on the main shaft provided driving pinion and another Beveloidrad combs with one arranged on the countershaft idler gear and drives this at.

By the angle provided by the invention between the main shaft and the intermediate shaft for reverse, for example, values between 1 ° and Assume 15 ° can, the center distance, which normally according to the state the technique is constant, about to increase the wheelset, whereby the degree of freedom of the design space increases, so that For example, geometric dependencies the gear ratio are better manageable.

The Invention will be described below with reference to the accompanying figure, which is a schematic Representation of a transmission according to the invention in Vorgelegebau way is explained in more detail by way of example.

In the figure is a transmission 1 shown in Vorgelegebauweise comprising a main shaft 5 , one parallel to the main shaft 5 arranged countershaft 3 and an intermediate shaft 6 for the realization of the reverse gear. According to the invention, the intermediate shaft 6 to realize the reverse gear at an angle α to the main shaft 5 arranged, whereby the axial distance via the wheelset is variably framed.

The on the intermediate shaft 6 gear wheels arranged for the reverse gear 2 . 2 ' are in front preferably formed as Beveloidräder, wherein a gear 2 with one on the main shaft 5 provided driving pinion meshes and another gear 2 ' with one on the countershaft 3 arranged loose wheel 4 combs and drives this.

By the concept of the invention is the design degree of freedom of a gear in countershaft design and thus the variability of the countershaft gear set increased in a simple manner.

1

transmission

2

gear

2 '

gear

3

Countershaft

4

Losrad

5

main shaft

6

intermediate shaft for the realization of the reverse gear

α

angle between main shaft and intermediate shaft for the realization of the reverse gear

Claims (4)

Gear in countershaft design, comprising a main shaft ( 5 ), a countershaft ( 3 ) and an intermediate wave ( 6 ) for reverse, with the countershaft ( 3 ) and the main shaft ( 5 ) are arranged parallel to one another, characterized in that the intermediate shaft ( 6 ) for the reverse gear at a certain angle (α) to the main shaft ( 5 ) is arranged. Gear in countershaft design according to claim 1, characterized in that a gear ( 2 ) of the intermediate shaft ( 6 ) for reverse with one on the main shaft ( 5 ) provided driving pinion meshes with another gear ( 2 ' ) of the intermediate shaft ( 6 ) for reverse gear with one on the countershaft ( 3 ) arranged loose wheel ( 4 ) combs and drives this. Gearbox in countershaft design according to claim 1 or 2, characterized in that on the intermediate shaft ( 6 ) arranged for the reverse gear ( 2 . 2 ' ) are designed as Beveloidräder. Gearbox in countershaft design according to claim 1, 2 or 3, characterized in that the angle (α) between the main shaft ( 5 ) and the intermediate shaft ( 6 ) assumes values between 1 ° and 15 ° for the realization of the reverse gear.