Automatic transmission control apparatus, power unit and straddle type vehicle

A technology of control equipment and automatic shifting, which is applied in transmission control, bicycle gear shifting mechanism, bicycles, etc., can solve the problem of overloading of shift actuators, and achieve the effect of suppressing overloading and shortening time.

CN101353077BInactive Publication Date: 2012-04-25YAMAHA MOTOR CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Publication Date
2012-04-25
Estimated Expiration
Not applicable · inactive patent

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Abstract

The present invention provides an automatic transmission control apparatus, a power unit and a Straddle-Type Vehicle. The automatic transmission control apparatus can shorten the time from starting to finishing a shift motion and suppresses overload applied to a shift actuator. The automatic transmission control apparatus is provided with a transmission apparatus, which has a plurality of shift gear pairs with different transmission gear ratios, and a gear selecting mechanism that selects a shift gear pair transmitting power; a shift motor, which drives the gear selecting mechanism; a shift power transmission mechanism, which transmits power of the motor to the gear selecting mechanism. Furthermore, the automatic transmission control apparatus is provided with a mechanical fuse within theshift power transmission mechanism, which generates an irreversible state change such that the transmission power becomes equal to or less than a predetermined value if the transmission power exceedsthe predetermined value.
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Description

technical field

[0001] The present invention relates to an automatic shift control device for automatically changing shift gears of the shift device, a power unit and a straddle vehicle provided with the automatic shift control device. Background technique

[0002] Conventionally known is a vehicle provided with an automatic transmission control device that automatically changes a shift gear. Generally, an automatic shift control device is provided with a shift device having a plurality of shift gear pairs and a gear selection mechanism, wherein the plurality of shift gear pairs have different shift gear ratios from each other, and the gear selection mechanism selects from the plurality of shift gear pairs Selecting a shift gear pair for power transmission; a shift actuator driving a gear selection mechanism; a shift power transmission mechanism transmitting power from the shift actuator to the gear selection mechanism.

[0003] In this case, there are cases where, in a tra...

Examples

Embodiment 1

[0140] In this case, in the present embodiment, the mechanical safety device 88 is composed of a power transmission portion 82f that transmits power from the first lever structure portion 82A to the second lever structure portion 82B. However, the mechanical fuse 88 is not limited to the power transmission portion 82f that transmits power from the first lever structure portion 82A to the second lever structure portion 82B. For example, if Figure 13 and Figure 14 As shown, the mechanical fuse 88 may be composed of a power transmission portion 82h that transmits power from the third shaft 81c configuring the drive shaft (output shaft) of the reduction mechanism 81 to the operating lever 84 .

[0141] Specifically, the power transmission portion 82h is composed of a plate-shaped main body having three thick portions 82y and two thin portions 82x formed between these thick portions 82y. The power transmission portion 82h is inserted into a notch portion 81z formed at the end o...

Embodiment 2

[0148] Such as image 3 As shown, in the above-described embodiment, the shift power transmission mechanism 80 is provided with a reduction mechanism 81 that reduces the rotational speed of the shift motor 70 , an operating lever 84 , a shift lever 82 , an operating lever 85 and a shift link mechanism 83 . However, the structure of the shift power transmission mechanism 80 is not limited thereto. Such as Figure 15 As shown, the shifting power transmission mechanism 80 may be composed of a reduction mechanism 81 , a shift linkage mechanism 83 and a connecting member 90 , wherein the connection member 90 connects the reduction mechanism 81 and the shift linkage mechanism 83 . For example, if Figure 16 As shown, the connection member 90 may be configured by a relatively non-rotatable element that coaxially connects the third shaft 81c of the reduction mechanism 81 and the shift operation shaft 83a of the shift linkage mechanism 83 .

[0149] Such as Figure 16 As shown, acc...