DE10314326A1 - Hydrodynamic converter with primary clutch and/or bridging clutch for motor vehicle drive train has axial outer dimensions and connection components to basic transmission the same independent of type of clutch - Google Patents

Abstract

The drive train has pump (2), turbine (3) connected to transmission intake shaft (4), stator (5), and primary clutch to connect drive (6) and pump and/or a bridging clutch, to connect drive and shaft. Axial outer dimensions and connection components to basic transmission are the same, and converters (1) are interchangeable, all independent of number and type of clutch. Both types of clutch are located in the same point in a converter, and the same basic transmission can be connected to the converter without requiring different components. There is a single pressure feed (9) in the same location, for all types of clutch.

Description

The present invention relates to a hydrodynamic converter with primary and / or converter lock-up clutch for the Drive train of a motor vehicle, in particular a work machine such as a wheel loader, forklift or dump truck according to the generic term of claim 1.

Hydrodynamic converters have been around the introduction automatic transmission the link between a drive machine and the actual transmission. A converter enables on the one hand through the Slip into a comfortable, jerk-free start and dampens at the same time Rotational irregularities of the Combustion engine. On the other hand, the principle-related excessive torque ceases great Starting torque available.

A hydrodynamic converter exists according to the prior art from a pump wheel, a turbine wheel, the reaction element (stator, stator) and that for torque transmission necessary oil.

The impeller, which by the Motor is driven, the oil in the converter in a circular flow. This oil flow hits onto the turbine wheel and is deflected there in the direction of flow.

The oil leaves the turbine and in the hub area arrives at the reaction member (stator), where it redirects again and thus in the right direction of flow fed to the impeller becomes.

The reversal creates on the stator a moment whose reaction moment increases the turbine moment. The relationship Turbine torque to pump torque is called torque increase. The bigger the Speed difference between the pump and turbine is the greater the moment increase, which is the maximum size when the turbine is stopped. Decreases with increasing turbine speed hence the torque increase from. If the turbine speed reaches approx. 85% of the pump speed, the torque increase = 1, i.e. the turbine torque is equal to the pump torque.

The guide wheel, which extends over the Freewheeling and supporting the stator shaft to the gearbox housing runs freely in this state in the flow with and the freewheel is overrun. From this point on, the converter works as a pure fluid coupling. During the The idler is stationary and is supported by the freewheel to the housing.

Converters are from the prior art known which a converter lockup clutch and a primary clutch include, the primary clutch (PK) between engine and converter and the converter lockup clutch between engine and Gearbox is switched.

Such converters are usually intended for vehicles that do work at very low speeds, but can also drive at high speeds. For example, under the DE 195 21 458 A1 a converter with converter lock-up clutch and primary clutch described. According to the prior art, a separate pressure feed and a separate valve unit are provided for the converter lock-up clutch and the primary clutch.

Transducers are also known a converter lockup clutch include and in particular in transport vehicles, such as Dumpers or cranes can be used. In contrast, converters with a primary clutch for machines such as Wheel loaders or forklifts used.

The present invention lies based on the task of creating a hydrodynamic converter, a converter lockup clutch and / or a primary clutch includes the compact design is and has a small number of components. In addition, should the converter according to the invention independently Interchangeable type and number of couplings (PK, WK) or coupling designs and be identical.

This task is due to the characteristics of claim 1 solved. Further configurations and advantages emerge from the subclaims.

It is therefore proposed that independently the axial external dimensions of the number and type of couplings and the connection components to the basic transmission are the same.

For converters with primary or Converter lockup clutch becomes the primary clutch located at the same location in the converter as the converter lock-up clutch, this is preferably done on the engine side.

Furthermore, are for the case a converter with lock-up clutch and primary clutch both according to the invention Couplings housed on the motor side.

These three converter embodiments according to the invention (i.e. with primary clutch, with converter lock-up clutch and with primary coupling and Converter lockup clutch) are interchangeable, identical in installation and axially the same external dimensions on.

The inventive concept is the use of the same basic transmission for all three converter versions allows whereby no different components are required for the converter connection.

The hubs of the transducers according to the invention are equipped with the same profiles and the axial dimensions are designed such that the overlap with the gear shafts is sufficient. This means that for all three converter versions The same central shaft, turbine shaft, stator support and the same connection on the pump hub or converter shell are provided on the transmission side.

Advantageously, only one pressure feed for all converter designs used, which is always provided in the same place. The pressure feed can through the central shaft, in the gap between the central shaft and the turbine shaft or, if there is no central shaft, within the turbine shaft respectively.

According to the invention, the same can Valve unit for the control of the clutches all converter designs be used.

The invention is illustrated below the attached Figures closer by way of example explained. Show it:

1 : A first embodiment of the present invention, in which a converter lock-up clutch is provided;

2 : Another embodiment of the present invention, in which a primary clutch is provided;

3 : Another embodiment of the present invention, in which a primary clutch is provided;

4 : A fourth embodiment of the present invention, in which a primary clutch is provided;

5 : A fifth embodiment of the present invention, in which a primary clutch is provided;

6 : A sixth embodiment of the present invention, in which the converter lock-up clutch and the primary clutch are arranged side by side;

7 : Another embodiment of the present invention, in which the converter lock-up clutch and the primary clutch are arranged one above the other;

8th : Another embodiment of the present invention, in which the converter lock-up clutch and the primary clutch are arranged one above the other; and

9 A ninth embodiment of the present invention, in which the converter lock-up clutch and the primary clutch are arranged one above the other.

In 1 is a hydrodynamic converter 1 shown comprising a pump 2 , a turbine 3 which with the transmission input shaft 4 is connected, and a stator 5 , Furthermore, the drive 6 of the engine as well as the converter shell 7 shown. The converter 1 comprises a converter lock-up clutch WK arranged on the motor side, which drives the drive 6 with the transmission or the transmission input shaft 4 releasably connects.

A piston is used to actuate the converter lock-up clutch WK 8th provided the piston chamber 12 via a pressure feed 9 is supplied with hydraulic oil. The pressure is supplied in the gap between the central shaft 11 and transmission input shaft 4 or turbine shaft, but can be carried out by the central shaft in other embodiments 11 or if no central shaft 11 is present, within the transmission input shaft or turbine shaft 4 respectively.

If, instead of the converter lock-up clutch WK, the converter is to have a primary clutch PK, then the primary clutch PK is at the same point in the converter 1 arranged like the converter lockup clutch WK. This is based on the 2 . 3 . 4 and 5 illustrates which each represent a preferred embodiment of a converter according to the invention with a primary clutch PK.

According to 2 is the inner disk carrier of the primary clutch PK with the pump 2 connected, but can also be made in one piece. The outer plate carrier of the primary clutch PK is over the converter shell 7 connected to the drive of the motor.

At the in 3 The embodiment shown is the converter shell 7 via a screwed washer 13 connected to the inner disk carrier of the primary clutch PK and the outer disk carrier of the primary clutch PK is connected to the pump 2 connected (or made in one piece).

In the 4 and 5 Embodiments shown is the outer plate carrier of the primary clutch PK with the pump 2 connected; the drive 6 of the engine is with the inner disk carrier 10 the primary clutch PK connected. In the embodiment according to 5 the primary clutch PK is opened under pressure, while in the 2 . 3 and 4 shown examples, the primary clutch PK is closed under pressure against the converter pressure.

Like from the 1 to 5 As can be seen, the connection components to the basic gear unit are the same, regardless of the coupling versions. In particular are central shaft 11 , Turbine shaft or transmission input shaft 4 , Stator support 15 and the gearbox-side connections on the pump hub 16 or converter bowl 7 equal. It will also use the same pressure feed 9 used for all converter versions, which is always provided in the same place. Furthermore, the same valve unit is used to control the couplings (PK, WK) for all coupling designs.

According to the invention, converters that have a converter lock-up clutch and a primary clutch are also designed in such a way that the connection components to the basic transmission are the same, regardless of the clutch arrangement. In this case too there are central shafts 11 , Turbine shaft or transmission input shaft 4 , Stator support 15 and the gearbox connections on the pump hub 16 or converter bowl 7 equal. It also uses the same pressure feed 9 used for all converter versions. This is based on the 6 . 7 . 8th and 9 clarified.

In 6 is the pump 2 connected to the inner plate carrier of the primary clutch PK and the outer plate carrier of the primary clutch PK is above the converter shell 7 with the drive 6 connected. The turbine 3 is connected to the inner plate carrier of the converter lock-up clutch WK and the aune plate carrier 14 the converter lock-up clutch WK is also over the converter shell 7 with the drive 6 connected.

In 7 Another embodiment of a converter according to the invention is shown. In this case too, the primary clutch PK and the converter lock-up clutch WK are arranged approximately one above the other and are connected by a common piston 8th via a common oil supply 9 actuated.

In the embodiment according to 7 is the pump 2 connected to the inner disk carrier of the primary clutch PK. The outer plate carrier of the primary clutch PK is with the drive 6 connected. The turbine 3 is connected to the outer plate carrier of the converter lock-up clutch WK and the drive 6 is over a screwed washer 13 connected to the inner plate carrier of the lockup clutch WK.

According to the converter 8th is the pump 2 (Impeller) connected to the outer plate carrier of the primary clutch PK or made in one piece. The inner disk carrier 10 the primary clutch PK is with the drive 6 connected or made in one piece. The turbine 3 is connected to the inner plate carrier of the converter lock-up clutch WK; furthermore is the drive 6 with the outer disk carrier 14 the converter lock-up clutch WK, which is also the inner plate carrier 10 the primary clutch can be PK.

According to the invention, the connection components to the basic gear units are also shown in FIG 9 shown embodiment the same. The pump 2 is connected to the outer plate carrier of the primary clutch. The inner disk carrier of the primary clutch PK is with the drive 6 connected. The turbine 3 is connected to the outer plate carrier of the converter lock-up clutch WK and the drive 6 is over a screwed washer 13 connected to the inner disk carrier of the converter lock-up clutch.

The embodiments according to the 6 to 9 also have the advantage that the primary clutch PK and the converter lock-up clutch WK by a common piston 8th via a common oil supply 9 can be operated.

1

hydrodynamic converter

2

impeller

3

turbine

4

Transmission input shaft

5

stator

6

drive of the motor

7

converter shell

8th

piston

9

oil supply

10

Inner disk carrier of the primary clutch

11

central shaft

12

piston chamber

13

disc

14

External disk carrier of the Converter lockup clutch

15

idler pad

16

pump hub

PK

Primärkuplung

WK

Converter lockup clutch

Claims (7)

Hydrodynamic converter for the drive train of a motor vehicle, comprising a pump ( 2 ), a turbine ( 3 ), which with the transmission input shaft ( 4 ) is connected to a stator ( 5 ), a primary clutch (PK), which drives ( 6 ) with the pump (impeller) ( 2 ) releasably connects and / or a converter lock-up clutch (WK), which connects the drive ( 6 ) with the transmission input shaft ( 4 ) releasably connects, characterized in that, regardless of the number and type of couplings (WK, PK), the axial external dimensions and the connection components to the basic transmission are the same, with the converter ( 1 ) are interchangeable and can be installed regardless of the number and type of couplings (WK, PK). Hydrodynamic converter according to claim 1, characterized in that in converters with a primary or converter lock-up clutch, the primary clutch (PK) at the same point in the converter ( 1 ) is arranged like the converter lockup clutch (WK). Hydrodynamic converter according to claim 1 or 2, characterized in that the same basic transmission regardless of the type and number of couplings (PK, WK) to the converter ( 1 ) can be connected, whereby no different components are required for the converter connection. Hydrodynamic converter according to claim 1, 2 or 3, characterized in that regardless of the type and number of couplings (PK, WK) the same central shaft ( 11 ), Turbine shaft ( 4 ), Stator support ( 15 ) and the same connection on the pump hub ( 16 ) or converter bowl ( 7 ) provided on the transmission side hen are. Hydrodynamic converter for the drive train of a motor vehicle, comprising a pump ( 2 ), a turbine ( 3 ), which with the transmission input shaft ( 4 ) is connected to a stator ( 5 ), a primary clutch (PK), which drives ( 6 ) with the pump (impeller) ( 2 ) releasably connects and / or a converter lock-up clutch (WK), which connects the drive ( 6 ) with the transmission input shaft ( 4 ) releasably connects, in particular according to one of the preceding claims, characterized in that only one pressure supply ( 9 ) is provided, which is always arranged in the same place. Hydrodynamic converter according to claim 5, characterized in that the pressure supply through the central shaft ( 11 ), in the gap between the central shaft ( 11 ) and turbine shaft ( 4 ) or inside the turbine shaft ( 4 ) is provided. Hydrodynamic converter according to one of the preceding Expectations, characterized in that for all coupling types the same valve unit is used to control the couplings (PK, WK) becomes.