A construction method of a cam mechanism for a foundation braking device
A basic brake device and cam mechanism technology, applied in the direction of brake actuators, gear transmission mechanisms, mechanical equipment, etc., can solve the problems of difficult shape inspection, complicated manufacturing process, and design method defects
Active Publication Date: 2018-09-25
LANGFANG KIM YUN ELECTRIC CO LTD
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Problems solved by technology
[0005] Since the manufacturing process of the cam profile according to the above patent is relatively complicated, and there are considerable difficulties in the inspection of the finished profile, it can be seen that the design method has defects, and it is not suitable for mass production and product quality control in the actual production process.
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[0045] Below, specific embodiments of the present invention will be described in detail in conjunction with the accompanying drawings, but they are not intended to limit the present invention.
[0046] Such as figure 1 As shown, it is a schematic structural diagram of a foundation braking device with a cam mechanism in an embodiment of the present invention; wherein, the cam mechanism in this embodiment may include: a push rod 7, a roller 6, a cam 3 and a piston 1, and a push rod 7 One side is connected with the brake mechanism of the foundation brake device, and the other side is connected with the roller 6 through the roller pin 5. The outer contour of the cam 3 is in contact with the roller 6, and the supporting angle of the piston 1 is hinged with the cam 3, and the cam 3 The rotation is realized by the cam pin 4.
[0047] Based on the above structural configuration, the embodiment of the present invention can realize the construction of the cam mechanism, specifically, b...
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The invention provides a construction method of a cam mechanism for a basic braking device. The method comprises the following steps that 1, an amplification factor model of a cam is determined so that the relationship function of the distances between the circle center of the outer circle of the cam and the rotation center of the cam under different amplification factors can be obtained; 2, an optimal compensation angle equation and the outer contour radius equation of the cam are determined; 3, according to the equation functions determined in the step 1 and step 2, the optimal compensation angles, outer contour radiuses and the distances between the circle center of the outer circle of the cam and the rotation center of the cam under the different amplification factors correspondingly are obtained through an iteration method, and the cam contour is drawn; and 4, the cam mechanism is made according to the drawn cam contour. The construction method has the characteristics that the construction precision is high and the model is more accurate.
Description
technical field [0001] The invention relates to the field of cam mechanism design, in particular to a construction method of a cam mechanism for a foundation braking device. Background technique [0002] As the power and running speed of rail transit vehicles continue to increase, the basic braking device must be required to output a larger braking force to ensure that the train can stop within the specified braking distance during emergency braking. At present, the force amplification mechanism of the foundation braking device mainly has three forms: lever, wedge-shaped slider, and cam. The use of cam structure has the advantages of compact structure, high braking efficiency, wide range of braking ratio, and in the large-magnification basic braking unit, it can realize a large amount of primary compensation after the brake shoe is worn. [0003] The cam mechanism of the basic braking device realizes changing the braking ratio of the basic braking device by changing the arc...
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IPC IPC(8): F16D65/18F16D121/14F16D125/28G06F17/50
CPCF16D65/18F16D2121/14F16D2125/28G06F30/15G06F30/17
Inventor 李宏超王永泉吴琼郭河晨宋秋桦陈淼毕克用崔文学
Owner LANGFANG KIM YUN ELECTRIC CO LTD