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Transmission gear of automobile instrument motor

A technology for transmission gears and automotive instruments, which is applied in the field of tooth profile structure, can solve the problems of large structural size, vibration and noise, and inconstant reduction ratio of the reduction transmission system, and achieve small structure, low vibration and noise, and large transmission speed ratio Effect

Inactive Publication Date: 2009-08-12
WUXI MCROT MOTOR
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The tooth profile of the gear mainly includes involute, arc, double arc, cycloid and quasi-hyperbola. The involute gear has the characteristics of constant rotation ratio and low noise and jitter, but the minimum number of small teeth is 12 teeth, so that The size of the reduction drive system becomes very large
The modified cycloidal gear tooth shape for standard clocks and watches allows the number of small teeth to be 6, but the reduction ratio is not constant during the transmission process, which will cause jitter and noise

Method used

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  • Transmission gear of automobile instrument motor
  • Transmission gear of automobile instrument motor
  • Transmission gear of automobile instrument motor

Examples

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Embodiment Construction

[0011] combine figure 1 , figure 2 and Figure 4 , the transmission gear of the automobile instrument motor of the present invention comprises a motor drive pinion 12, a middle bull gear 13, a middle pinion 14 and an output bull gear 15, the middle bull gear 13 and the middle pinion 14 are coaxial gears, and the drive pinion 12 It meshes with the middle bull gear 13, and the middle pinion gear 14 meshes with the output bull gear 15. The tooth profile structure of the driving pinion 12 and the middle pinion gear 14 is the same, collectively referred to as the pinion, the middle bull gear 13 and the output bull gear 15 The tooth profile structure is the same, collectively referred to as the bull gear, and the tooth profile of the pinion is a symmetrical curve along the axis OA, which is composed of the first to sixth arcs 1, 2, 3, 4, 5, and 6 that are tangent. The tooth profile of the relatively meshing bull gear is a symmetrical curve along the axis OE, which is composed of ...

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Abstract

The invention discloses a transmission gear of an automotive instrument motor, which comprises a motor driven pinion, a middle gearwheel, a middle pinion and an output gearwheel. The middle gearwheel and the middle pinion are coaxial gears, the driven pinion and the middle gearwheel are meshed, the middle pinion and the output gearwheel are meshed, the driven pinion and the middle pinion have the same outline structure and are named as pinions, the middle gearwheel and the output gearwheel have the same outline structure and are named as gearwheels, the outline lines of the pinions are curves which are symmetrical along an axis OA and consist of six sections of tangential circular arcs, and the outline lines of the correspondingly meshed gearwheels are curves which are symmetrical along an axis OE and consist of five sections of tangential circular arcs; and the pinions and the gearwheels are meshed to work. The transmission speed ratio of the transmission gear is large and can reach 30 to 1; the tooth number of the pinions can be six so as to ensure a small integral structure; and when the gearwheels and the pinions are in meshed transmission, the transmission is smooth, and the vibration and noise are low.

Description

technical field [0001] The invention belongs to gear transmission technology, in particular to a tooth profile structure for gear transmission of an automobile meter motor. Background technique [0002] Gear transmission is the most widely used basic transmission form in various mechanical transmissions. It relies on the teeth of the driving wheel to push the teeth of the driven wheel in turn to transmit motion and power, and can transmit the rotary motion between any parallel shafts, intersecting shafts and staggered shafts. The tooth profile of the gear mainly includes involute, arc, double arc, cycloid and quasi-hyperbola. The involute gear has the characteristics of constant rotation ratio and low noise and jitter, but the minimum number of small teeth is 12 teeth, so that The structural dimensions of the reduction drive system become very large. The corrected cycloidal gear tooth profile for standard clocks and watches allows the number of small teeth to be 6, but the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16H1/20F16H55/17
Inventor 金闻瑞
Owner WUXI MCROT MOTOR
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