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A kind of ru, yu tooth type automobile synchronous belt pulley tool and its design method

A technology of synchronous pulley and design method, applied in the direction of belt/chain/gear, gear teeth, mechanical equipment, etc., can solve the problems of belt tooth surface wear, affecting belt transmission life, and difficulty in ensuring the uniformity of tool tooth profile and tooth shape. , to achieve the effect of high profile accuracy and small tooth profile error

Active Publication Date: 2020-05-05
QIQIHAR UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For RU and YU toothed synchronous belt drives, the standard only provides synchronous belt pulley tooth profile parameters ( image 3 , Table 1), the corresponding tool tooth profile parameters are not provided
There is no uniform standard tool tooth profile parameters, it is difficult to ensure the uniformity of the tool tooth profile in engineering applications, and it is difficult to control the tooth profile accuracy of the processing belt pulley
The tooth shape error of the pulley will cause the tooth surface wear, friction noise and vibration, and affect the transmission life of the belt

Method used

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  • A kind of ru, yu tooth type automobile synchronous belt pulley tool and its design method
  • A kind of ru, yu tooth type automobile synchronous belt pulley tool and its design method
  • A kind of ru, yu tooth type automobile synchronous belt pulley tool and its design method

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specific Embodiment approach 1

[0022] Specific implementation mode 1: This implementation mode provides a kind of RU, YU tooth type synchronous pulley rack cutter, such as figure 1 As shown, the synchronous pulley rack cutter includes a rack cutter 8, a cutter tooth profile 5 and a root groove straight section 6, and the cutter tooth profile 5 is a symmetrical figure ( figure 2 ), the one-sided tooth profile is formed by tangentially connecting two arc curves of tooth root arc 4, tooth root transition arc 3, tooth side arc 2, and addendum arc 1, among which: root arc has a radius of r 4 , the radius of the root transition arc is r 3 , the radius of the flank arc is r 2 , the radius of the addendum arc is r 1 ; The distance dp from the straight line segment 6 of the tooth space of the tool to the pitch line 7 of the tool is the pitch line difference; The distance from the center of the root arc 4 to the symmetry line of the tooth profile is s; the center of the addendum arc 1 is on the y-axis of the sy...

specific Embodiment approach 2

[0031] Embodiment 2: In this embodiment, when the number of teeth of the RU toothed pulley ranges from 17 to 29, the standard pulley tooth profile parameter h g =3.43mm; R 1 =2.476mm; R 2 = 1.110mm; R 3 = 4.170 mm; dp = 0.686 mm; P = 9.525 mm. When processing pulleys with the number of teeth in this range, the distance s between the center of the dedendum arc and the symmetrical line of the tooth profile is 3.8954-4.0604mm; the radius of the dedendum arc is r 4 1.2759~1.4280mm; the maximum direction angle θ of the dedendum arc 4max 151.155~153.916°; addendum arc radius r 3 6.2118~9.2040mm; tooth side arc radius r 24.0159~4.0468mm; addendum arc radius r 1 It is 2.3132~2.3818mm; the distance from the top of the tooth to the tooth groove of the tool is Hs=3.43mm.

specific Embodiment approach 3

[0032] Specific Embodiment Three: In this embodiment, when the number of teeth of the RU toothed pulley ranges from 17 to 29, the tool tooth profile radius r 1 = 2.3308 mm; r 2 = 4.0234 mm; r 3 =8.6961mm; r 4 = 1.3860mm; θ 4 = 151.581°; s = 4.0156mm, the processing pulley is within the error range of the tooth shape.

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Abstract

The invention discloses a RU, YU toothed synchronous pulley rack cutter and a design method thereof. The synchronous pulley rack cutter comprises a rack cutter, a cutter tooth profile and a straight line segment of a tooth root groove thereon, and the The tooth profile of the tool is a symmetrical tooth profile, and the unilateral tooth profile is formed by tangential connection of four arc curves of the tooth root arc, the tooth root transition arc, the tooth side arc, and the tooth top arc. According to the meshing principle and the numerical calculation method, the invention designs and processes the tooth profile of the pulley and rack cutter according to the tooth profile parameters of the RU and YU toothed pulleys. Through the research on the undercutting mechanism of the tool root arc and the transition arc segment, the criteria for the arc radius and direction angle that the root arc and the transition arc do not produce undercut are determined. The tooth profile parameters of the tool are determined according to the principle of minimum tooth profile error of the yoke rack cutter. When the tool designed by the invention processes the pulley with a certain number of teeth, the tooth profile of the pulley and the standard pulley have a small error, and the tooth surface of the pulley is smooth without undercutting.

Description

technical field [0001] The invention belongs to the technical field of synchronous belt pulley processing of an automobile engine timing system, and relates to a RU and YU toothed synchronous belt pulley cutter and a design method thereof. Background technique [0002] The timing system of the automobile engine transmits the motion of the crankshaft to the camshaft, and the cam mechanism on the camshaft controls the opening and closing of the valve according to the rotation angle and phase relationship of the crankshaft. The RU and YU tooth types are synchronous belts used in automobile timing systems, and the synchronous belt transmits the power and movement between the crankshaft pulley and the camshaft pulley. The synchronous pulley is usually cut by a hob (the tooth profile of the hob is the tooth profile of the rack tool). In the national standard "GB / T 10414-2017 Synchronous Belt Drive Automobile Synchronous Pulley", such as ZH and YH tooth types Such as synchronous p...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B23F1/00
CPCB23F1/00
Inventor 郭建华王瑀吴贻珍胡清明曹忠亮
Owner QIQIHAR UNIVERSITY