Torque sensing device of electric cycle
A sensing device and electric power assist technology, which is applied to vehicle components, vehicle gearboxes, and rider drives, can solve problems such as swinging torque output parts, affecting accuracy, and large sliding resistance, and achieve axial movement resistance Reduce, improve detection accuracy, avoid the effect of axial swing
Inactive Publication Date: 2010-06-16
刘海平
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Problems solved by technology
The current torque sensor has the following defects: the radial motion of the sprocket crank can only be converted into radial displacement. If a signal output is required, it must be detected after the wheel rotates twice, and the output signal is not linear and continuous. The problem of signal output shutdown hysteresis
However, the torque sensing device of this structure has at least the following defects: 1. When the driving member rotates to drive the driven member to rotate, due to the need to convert the radial motion into axial displacement, there is a gap between the inclined shaft and the inclined shaft hole. There is a lot of friction. During the test, it often happens that it is stuck and unable to rotate, or the follower cannot be reset even if the pedaling force disappears after rotating to a certain position.
2. The friction between the inclined shaft and the inclined shaft hole causes great wear, which makes the cooperation between the inclined shaft and the inclined shaft hole invalid
3. Due to the uneven pedaling force of the rider, the torque output part tends to swing, which affects the accuracy of detection
4. Since the active part and the driven part are coordinated through the pin shaft, and there is an axial relative displacement between the active part and the driven part, there is a gap between the pin shaft and the pin hole of the driven part. Larger sliding resistance is not conducive to the axial relative movement of the active part and the driven part, which affects the detection accuracy
Method used
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Embodiment Construction
[0036] Such as figure 1 As shown, in the first embodiment of the electric bicycle torque sensing device of the present invention, it includes a driving part 11 that introduces power, a torque output part 12 arranged on the outer ring of the driving part 11, and is driven by the driving part 11 through a connecting part 16. The rotating follower 13 and the displacement sensing structure arranged on the inner ring of the follower 13 . A moving gap 14 is provided between the driven member 13 and the driving member 11 ; an elastic member for pushing the driven member 13 to reset is provided between the driven member 13 and the driving member 11 . In this embodiment, the connecting piece 16 is a pin shaft, and the elastic piece is a spring 15. It can be understood that the connecting piece 16 and the elastic piece can also be other components, as long as the functions of connection and elastic reset can be completed.
[0037] Such as figure 2 , image 3 As shown, the active mem...
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The invention relates to a torque sensor for an electrically-assisted vehicle, which comprises a driving part for introducing power, a torque output part arranged on an outer lane of the driving part,a driven part driven by the driving part through a connecting part, and a displacement sensor arranged in an inner lane of the driven part, wherein a moving clearance is reserved between the driven part and the driving part; an elastic part is arranged between the driven part and the driving part; the circumference of the torque output part is provided with a radial plug jack; the outer circumference of the driven part is provided with a guide spiral groove; a cross shaft is inserted in the plug jack and the guide spiral groove; and one section of the cross shaft is connected with the guide spiral groove through a bearing, while the other section of the cross shaft is arranged in the radial plug jack. The torque output part is provided with the plug jack, meanwhile, the bearing is arranged between the cross shaft and the guide spiral groove, so as to reduce the friction between the cross shaft and the guide spiral groove, thereby greatly reducing the axial motion-resistance force, making the radial motion effectively transform to axial displacement, improving detection accuracy and reducing abrasion.
Description
technical field [0001] The invention relates to a torque sensor, and more specifically, relates to a torque sensor device that can be used in electric bicycles. Background technique [0002] With the gradual maturity of battery technology and the world's increasing emphasis on environmental protection requirements, electric mopeds (mainly powered by human power on flat ground, and equipped with electric auxiliary drive on slopes and other load occasions) have gradually become the first choice for environmentally friendly vehicles. [0003] In order to realize the detection of the load situation, it is necessary to add a torque sensing device to detect the change of the pedaling force of the cyclist, and judge whether electric power assistance is needed. The current torque sensor has the following defects: the radial motion of the sprocket crank can only be converted into radial displacement. If a signal output is required, it must be detected after the wheel rotates twice, a...
Claims
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IPC IPC(8): B62M23/02B62M6/50
Inventor刘海平
Owner刘海平