Transmission unit

A technology of transmission units and components, applied in transmission boxes, transmission devices, fluid transmission devices, etc., can solve the problems of increased structural space of transmission units, high flow resistance, power loss, etc., to minimize flow resistance, short flow length, The effect of low structure space

Inactive Publication Date: 2013-10-02
MAGNA POWERTRAIN AG & CO KG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In this arrangement, however, the construction space required for the drive unit increases
In addition, the suction and pressure spaces result in relatively high flow resistances depending on the length and conduction cross-section, which leads to corresponding power losses

Method used

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Examples

Experimental program
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Embodiment Construction

[0036] according to figure 1 , the known transmission unit comprises a planetary gear set 11 formed as a pump, said planetary gear set 11 being mounted in a not-shown pump housing. The planetary gear set 11 comprises a sun gear 13 , an arrangement of several planetary gears 14 and a ring gear 15 . The planet wheels 14 are mounted on a planet carrier 16 , which is connected in a rotationally fixed manner to a drive element (not shown), which rotates about an axis of rotation R, for example. The ring gear 15 can be connected in a rotationally fixed manner to a driven element, also not shown, or can be formed in one piece therewith. Connecting pieces 18 of the planet carrier 16 are respectively arranged between two adjacent planetary gears 14, the outer walls of which connecting pieces 18 are close to the sun gear 13, the ring gear 15 and the teeth of the two corresponding planetary gears 14 to form Seal the gap. The interspace 17 of the planetary gear set 11 remaining outside...

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PUM

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Abstract

The invention relates to a transmission unit comprising a planetary gear set which comprises a plurality of gear elements and is designed as a pump, which brings about delivery of hydraulic fluid from a suction chamber to a pressure chamber of a pump housing containing the planetary gear set by means of the gear elements. A controllable throttle device is provided for selectively throttling a fluid flow delivered between the suction chamber and the pressure chamber, and for thereby braking the gear elements of the planetary gear set relative to each other. A fluid tank is disposed in an intermediate space of the pump housing formed between a plurality of gear elements of the planetary gear set and can be connected to the suction chamber and the pressure chamber simultaneously by means of the throttle device.

Description

technical field [0001] The invention relates to a transmission unit with a planetary gear set comprising gear elements and designed as a pump, which pumps hydraulic fluid via the gear elements from the suction space of the pump housing containing the planetary gear set to The pressure space, wherein a controllable throttle device is provided in order to selectively throttle the fluid flow conveyed between the suction space and the pressure space and thereby brake the gear elements of the planetary gear set relative to one another. Background technique [0002] This type of transmission unit can be used in different applications to provide two different transmission ratios, which can be switched between the two transmission ratios through the control of the throttling device. For example, by completely closing the throttle, the pump can be blocked and thus produce a direct drive of the planetary gear set. By opening the throttle, circulating pumping between the suction space...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16H3/44F16H3/78F04C2/14F16H57/02
CPCF04C2/14F04C15/0057F16H3/722F16D31/04F16H47/04
Inventor H.斯坦温德
Owner MAGNA POWERTRAIN AG & CO KG
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