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: 2011-04-20
WUXI MCROT MOTOR
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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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[0011] combine figure 1 , figure 2 and Figure 4 , The transmission gear of the automobile instrument motor of the present invention includes a motor driving pinion 12, an intermediate large gear 13, an intermediate pinion 14 and an output large gear 15. The intermediate large gear 13 and the intermediate pinion 14 are coaxial gears, and the driving pinion 12 It meshes with the intermediate large gear 13, the intermediate pinion 14 meshes with the output large gear 15, and the driving pinion 12 and the intermediate pinion 14 have the same tooth profile structure, which are collectively referred to as pinions. The intermediate large gear 13 and the output large gear 15 The tooth profile structure is the same, which is collectively referred to as the large gear. The tooth profile of the pinion is a symmetrical curve along the axis OA, which is composed of the tangent first to sixth arcs 1, 2, 3, 4, 5, and 6. The tooth profile of the relatively meshed gear is a symmetrical cur...
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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 thesame 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 curveswhich 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 the gear transmission technology, in particular to a tooth profile structure for gear transmission of an automobile instrument motor. Background technique [0002] Gear transmission is the most widely used basic transmission form in all kinds of mechanical transmission. It transmits motion and power by pushing the gear teeth of the driven wheel in turn by the teeth of the driving wheel, and can transmit the rotary motion between the parallel shafts, intersecting shafts and staggered shafts that are equipped arbitrarily. The tooth profile of the gear mainly includes involute, arc, double arc, cycloid and quasi-hyperbolic. The size of the reduction drive system has become very large. The modified cycloidal gear tooth profile for standard clocks allows the number of small teeth to be 6, but the reduction ratio in the transmission process is not constant, which will cause jitter and noise. SUMMARY OF THE INVENTION [0003] The...
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IPC IPC(8): F16H1/20F16H55/17
Inventor 金闻瑞
Owner WUXI MCROT MOTOR