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Step mechanical speed changer without power transmission interruption during gear shift

A mechanical transmission and power transmission technology, which is applied in mechanical equipment, mechanical control devices, instruments, etc., can solve problems such as poor shifting quality and shocks that are difficult to compensate, and achieve avoiding fuel waste, alleviating torsional vibration and noise, and improving power sexual effect

Active Publication Date: 2010-08-18
GUANGZHOU AUTOMOBILE GROUP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This scheme has aroused great attention in the field of international vehicle transmission transmission, but there are still some major deficiencies, such as the interruption of power transmission, although it no longer exists when it is raised from a low gear to a high gear, it still exists when it is lowered from a high gear to a low gear ; Its end-face jaw-type shifting combination device makes shifting shock, torsional vibration and noise more prominent. Even if the electronically controlled main clutch and electronically controlled accelerator technology with high coordination requirements are used, it is still difficult to make up for the poor shifting quality. high disadvantage, etc.

Method used

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  • Step mechanical speed changer without power transmission interruption during gear shift
  • Step mechanical speed changer without power transmission interruption during gear shift
  • Step mechanical speed changer without power transmission interruption during gear shift

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0051] In this embodiment, the shift combination device of the transmission is shown in Figure 2, and a multi-state controllable clutch with a controllable forced return to neutral device is added to replace the meshing sleeve or synchronizer in a general stepped mechanical transmission.

[0052] In Figure 2, the centering spring 62 and the centering steel ball 61 are placed in the radial hole of the outer ring 1; the cage 2 keeps the pitch between the rollers 3 constant, and the inner ring 4 is located in the star wheel shape In the inner cavity, the roller 3 is located in the working space formed by the inner cavity of the outer ring 1 and the outer circle of the inner ring 4; Under the action of the fork ring, not shown in the figure), it can also move axially relative to the outer ring 1 and the cage 2, resulting in the groove 501 or the boss 502 part ( Figure 2a Middle C to sectional view) is in contact with the centering steel ball 61. The outer ring 1 and the inner ri...

Embodiment 2

[0071] On the basis that embodiment 1 realizes gear shifting without power interruption between I-II gears, several groups image 3 The shift combination device based on the multi-state controllable clutch shown replaces the synchronizer in the general stepped mechanical manual transmission, as the shift combination device 04 in Fig. A simple change can reliably realize switching between multiple gears without power interruption.

[0072] Such as Figure 6 As shown, the end G3 of the shift lever can move longitudinally and laterally under the control of the shift lever (not shown in the figure); the shift fork shafts 71, 72, 73 are arranged side by side, and there are proper shaped design The shift slot can move laterally under the push of G3 at the end of the shift lever. Both ends of the shift fork shaft are equipped with return springs 621 to ensure that the shift fork shaft returns to the neutral position after breaking away from the constraint of the end of the shift rod...

Embodiment 3

[0080] The multi-state controllable clutch in the present embodiment uses the inner star wheel two-way roller type ( Figure 13 ) or sprag-type free-wheel clutch as a basis for controllable improvement. The biggest difference between it and Embodiment 1 is that it can switch between all the aforementioned four working states under control.

[0081]The structural features of the multi-state controllable clutch of this embodiment differ from that of Embodiment 1 in that first, the inner profile of the outer ring 1 is circular, and the inner ring 2 becomes a star wheel; ) on the extended part of the cage 2', set a number of control windows 25 with appropriate shapes ( Figure 14 ) to cooperate with the finger pin 9, and the finger pin 9 is affixed to the shift fork ring 52 (not shown in the figure).

[0082] Under the constraints of the control window 25, through the forced axial movement of the actuator such as the fork ring, the finger pin 9 makes the cage 2' (thereby the rol...

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Abstract

The invention relates to a step mechanical speed changer without power transmission interruption during gear shift. The common gear shift composite set (synchronizer or shift sleeve assembly) of a step mechanical speed changer is replaced by a polymorphic controllable clutch assembly which is controlled by an actuating component and has the functions of a free-wheel or overdrive clutch. The free-wheel clutch, which is used as the basic part for mechanical transmission, can be improved in a controllable way to obtain the polymorphic controllable clutch, so that the clutch can be switched among multiple working positions in a partially or totally controlled way. The polymorphic controllable clutches in all the gears are controlled, combined and switched in a reasonable way, thereby realizing the function of no power transmission interruption during bidirectional gear shift.

Description

technical field [0001] The invention belongs to the technical field of mechanical systems, especially the transmission of motor vehicles, and in particular relates to a stepped mechanical transmission capable of shifting gears without interrupting power transmission. Background technique [0002] A mechanical transmission is a variable speed transmission commonly used in mechanical systems, especially motor vehicles, and has a significant impact on the performance of the system. Existing stepped mechanical transmissions, especially for vehicles, are divided into three categories: manual, automatic and manual-automatic according to their shifting methods, all of which are composed of multi-stage gear transmission pairs, shifting combination devices (such as synchronizers, etc.) and Its operating mechanism, main clutch and its operating mechanism, box and other main components. Among them, the manual transmission (MT) is relatively simple in structure, cheap and efficient, bu...

Claims

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Application Information

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IPC IPC(8): F16H61/684F16H63/32
Inventor 黄向东赵克刚刘延伟罗玉涛黄河袁仲荣
Owner GUANGZHOU AUTOMOBILE GROUP CO LTD
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