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Shifting assembly for shifting the reverse gear of a variable speed gearwheel transmission and variable speed gearwheel transmission

一种齿轮变速器、变速器的技术，应用在离合器、机械驱动离合器、机械设备等方向，能够解决长换档时间、过多结构空间、高制造成本等问题，达到小结构空间、少结构空间的效果

Inactive Publication Date: 2014-07-30
ZF FRIEDRICHSHAFEN AG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But these solutions are not optimal because they require too much construction space, high manufacturing costs or long shifting times

Method used

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  • Shifting assembly for shifting the reverse gear of a variable speed gearwheel transmission and variable speed gearwheel transmission
  • Shifting assembly for shifting the reverse gear of a variable speed gearwheel transmission and variable speed gearwheel transmission
  • Shifting assembly for shifting the reverse gear of a variable speed gearwheel transmission and variable speed gearwheel transmission

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Experimental program
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Effect test

Embodiment Construction

[0030] In the shifting system 1 according to the present invention figure 1 In the embodiment shown in , the reverse gear 4 is arranged rotatably and axially displaceably on the transmission shaft 2 . The reverse gear rotates about the central axis 3 of the transmission shaft 2 and is supported on the transmission shaft 2 by means of rolling bearings 17 . In the region of the outer circumference of the reverse gear 4 , the reverse gear 4 has a groove 19 into which the end of the shift fork 20 engages. In addition to the reverse gear 4 , a forward gear 15 is also mounted rotatably about the center axis 3 on the transmission shaft 2 via rolling bearings 18 .

[0031] On the side of the reverse gear 4 facing away from the forward gear 15 , a roller bearing 21 is arranged on the transmission shaft 2 , via which roller bearing 21 the transmission shaft 2 is supported in a transmission housing (not shown). The transmission shaft 2 can be, for example, the output shaft of the trans...

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Abstract

A shifting system (1) for reverse shifting of a gear transmission is proposed. The shifting system (1) comprises a reverse gear (4) rotatably arranged on a transmission shaft (2), the reverse gear (4) having a first clutch mesh (5). A clutch body (6) with a second clutch toothing (7) is assigned to the reverse gear (4), which is connected in a rotationally fixed manner to the transmission shaft (2). To engage reverse gear, the first clutch tooth part (5) and the second clutch tooth part (7) are pushed axially into each other. The synchronizing ring (8), which is operatively connected to the reverse gear (4), has a friction surface (9), which interacts with a counter friction surface (16) during the synchronization process. The synchronizer ring (8) and the reverse gear (4) can be twisted relative to each other in the circumferential direction by a limited angular amount between the locked position and the shifted position. A fastening element (14) arranged between the synchronous ring (8) and the reverse gear (4) pretensions the synchronous ring (8) relative to the reverse gear (4) toward a locked position.

Description

technical field [0001] The present invention relates to a reverse shift system of a gear transmission, and a gear transmission with such a reverse shift system. Background technique [0002] Manually shiftable and automatic gear transmissions have until now generally been designed and used without mechanical synchronization of the reverse gear for reasons of cost and due to limited installation space. But here, under certain conditions, unpleasant rattling noises and gearshift bumps occur when reverse gear is engaged. In addition, the rattle when engaging reverse gear causes increased gear wear. In addition, long shift times can result in hot transmissions. [0003] To avoid these disadvantages, various solutions have been proposed. None of these solutions is optimal, however, since they require too much installation space, high manufacturing costs or long shifting times. [0004] DE 10054757 A1 discloses a shifting system for fast, noiseless reverse shifting in a gear t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F16D23/06
CPCF16D23/0606Y10T74/19284
Inventor 斯特凡·伦纳
Owner ZF FRIEDRICHSHAFEN AG
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