Branched lubricant lines

Abstract

The invention relates to a transmission having at least one planetary stage, wherein the planet carrier (101) of the planetary stage has a first toothing and at least one lubricant line (103, 105) with a first outlet opening, wherein the first toothing forms a mating toothing (113) with a second toothing, and wherein the first outlet opening is designed for lubricating the mating toothing (113). The lubricant line (103, 105) has a second outlet opening, wherein the second outlet opening is designed for lubricating the sun gear (111) of the planetary stage.

Description

Technical Field

[0001] The invention relates to a transmission having at least one planetary stage. Background Art

[0002] EP 3 008 355 B1 discloses a transmission having oil-conducting ducts which are used for pressure lubrication of toothing elements having axial contact surfaces. Summary of the invention

[0003] The invention is based on the object of improving the lubricant supply to the transmission.

[0004] This object is achieved by a transmission according to the invention having at least one planetary stage.

[0005] The transmission has a planetary stage. The planet carrier of the planetary stage forms a first toothing and at least one lubricant line. The first toothing forms a matching toothing with a second toothing. The second toothing is formed by another component of the transmission. The second component can be, for example, a sun shaft of another planetary stage.

[0006] The teeth of the mating toothing are oriented coaxially and mesh with each other. This achieves a rotationally fixed connection between the teeth. That is, there is a rotationally fixed connection between the first toothing and the second toothing, and therefore between the planet carrier and the other components.

[0007] The lubricant circuit has an inlet opening in addition to the first outlet opening and, according to the invention, a second outlet opening. These openings are connected to one another in a lubricant-conducting manner. The inlet opening is integrated into the lubricant circuit of the transmission in such a way that the lubricant is introduced into the lubricant circuit through the inlet opening.

[0008] The lubricant line branches. Thus, a first portion of the lubricant introduced into the lubricant line is directed to the first outlet opening and there escapes from the lubricant line. A second portion of the lubricant introduced into the lubricant line is directed to the second outlet opening and there escapes from the lubricant line.

[0009] The first outlet opening is designed to lubricate the mating toothing and is arranged such that the overflowing lubricant reaches the gap between the first toothing and the second toothing.

[0010] The invention is distinguished in that the second outlet opening is designed to lubricate the sun gear of the planetary stage or the toothing of the sun gear. Therefore, the second outlet opening is oriented so that the lubricant overflowing from the second outlet opening at least partially reaches the toothing of the sun gear.

[0011] According to the invention, the mating toothing and the toothing of the sun gear are lubricated by means of a single lubricant circuit formed by the planet carrier, which simplifies the design of the lubricant circuit.

[0012] In a preferred improvement, the second outlet opening is designed as a nozzle. By spraying the lubricant overflowing from the second outlet opening onto the toothing of the sun gear, a gap between the second outlet opening and the sun gear can be bridged.

[0013] The first outlet opening can also be designed as a nozzle. In this case, the lubricant may be sprayed from the first outlet opening onto the mating toothing in such a way that at least a portion of the lubricant reaches the gap between the first toothing and the second toothing.

[0014] However, the first outlet opening is preferably developed for supplying lubricant to the mating toothing by pressure lubrication. This means that there is a lubricant-conducting and pressure-conducting connection between the first outlet opening and the mating toothing or between the first outlet opening and the gap between the first toothing and the second toothing. Such a connection can be achieved by arranging the first outlet opening and the mating toothing in close proximity to one another.

[0015] In a preferred improvement, the lubricant circuit comprises a first hole and a second hole. In particular, the lubricant circuit can be formed by the first hole and the second hole. The first hole forms the first outlet opening and opens into the second hole or into the side of the second hole. The first opening of the first hole is correspondingly identical to the first outlet opening. The second opening of the first hole is located on the side of the second hole. The second hole forms the inlet opening and the second outlet opening of the lubricant circuit. The manufacture of the lubricant circuit is simplified by two holes opening into each other.

[0016] The first hole and the second hole are preferably developed to have different diameters. Due to the different diameters, the ratio of lubricant allocated to lubricating the mating toothing and lubricating the other components can be determined in a targeted manner. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] exist Figure 1 The preferred embodiment of the present invention is shown in the accompanying drawings.

[0018] Figure 1 A detail of a sectional illustration of a planet carrier is shown. DETAILED DESCRIPTION

[0019] exist Figure 1 The planet carrier 101 shown in FIG. 1 has a first hole 103 and a second hole 105. The lubricant conveyed by the transmission housing 107 reaches the second hole via the transfer ring 109.

[0020] The second hole 105 is arranged so that a part of the lubricant is ejected from the outlet opening of the second hole 105 onto the sun gear 111. The sun gear 111 and the planet carrier 101 belong to the same planetary stage.

[0021] The first bore 103 branches off from the second bore 105. Another part of the lubricant thus flows via the second bore 103 into the mating toothing 113, which is formed by the sun shaft 115 and the planet carrier 101 of the planetary stage connected upstream.

[0022] List of Reference Numerals

[0023] 101 Planet carrier

[0024] 103 First Hole

[0025] 105 Second Hole

[0026] 107 Transmission housing

[0027] 109 Transmission Ring

[0028] 111 Sun gear

[0029] 113 Matching tooth

[0030] 115 Sun Axis

Claims

1. A transmission device having at least one planetary stage; The planet carrier (101) of the planetary stage forms a first toothing and at least one lubricant line with a first outlet opening; The first tooth portion and the second tooth portion form a matching tooth portion (113); and wherein The first outlet port is designed to lubricate the mating toothing (113), wherein: The lubricant overflows from the first outlet opening onto the mating toothing in such a way that at least a portion of the lubricant reaches the gap between the first toothing and the second toothing; characterized in that The lubricant circuit has a second outlet port; wherein The second outlet port is designed to lubricate the sun gear (111) of the planetary stage, wherein the lubricant circuit comprises a first hole (103) and a second hole (105); wherein the first hole (103) forms the first outlet port and opens into the second hole (105); and wherein the second hole (105) forms an inlet port and the second outlet port, In this case, the mating toothing and the toothing of the sun gear are lubricated by means of a single lubricant line formed on the planet carrier.

2. The transmission device according to claim 1, characterized in that: The second outlet opening is designed as a nozzle.

3. A transmission according to any one of the preceding claims; The first outlet port is designed for pressure lubrication of the mating toothing (113).

4. The transmission device according to claim 1, characterized in that: The diameter of the first hole (103) is different from the diameter of the second hole (105).

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