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Anti-backlash gear

A gear and anti-backlash technology, which is applied to belts/chains/gears, components with teeth, portable lifting devices, etc., can solve the problem of poor stress on gears and transmission shafts, complex spring design and installation, and gear stress Unbalanced and other problems, to achieve the effect of simple structure, convenient use and maintenance, and balanced force

Inactive Publication Date: 2016-03-23
GUILIN UNIV OF AEROSPACE TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The structure is relatively simple, but the design and installation of the spring are more complicated, which will inevitably reduce the transmission efficiency during transmission.
Difficult to design and manufacture for smaller and larger gears
At the same time, in the transmission, because the two gears mesh with the driving gear in different directions, there is a problem of unbalanced force on the gears, which makes the gears and the drive shaft in a bad state.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] Embodiment 1 of this anti-backlash gear is as figure 1 , figure 2 As shown, it includes a longitudinally divided driven gear and an anti-backlash mechanism. The plane perpendicular to the axis divides the driven wheel longitudinally into three gear pieces, the outer gear I (2), the outer gear II (6) and the middle gear piece (5), the outer gear I (2) and the outer gear II (6) ) are equal in thickness, and the thickness of the gear plate (5) in the middle is 2 times of the thickness of the outer gear plate (2). The hubless intermediate gear (5) and the other two outer gears (2, 6) are installed on the shaft (3), and the left and right spring collars (4) on the shaft connect the three gears (2, 5, 6) Axial positioning, such as figure 2 shown.

[0034] The anti-backlash mechanism is installed on the left and right sides of the intermediate gear (5). There are 4 connecting holes on the intermediate gear (5). The center line of the hole is parallel to the central axis...

Embodiment 2

[0037] Embodiment 2 of this anti-backlash gear is as Figure 5 , Figure 6 As shown, its structure is similar to Embodiment 1, and the plane perpendicular to the axis divides the driven wheel longitudinally into three gear plates, the outer gear I (2), the outer gear II (6) and the middle gear plate (5), the outer The thickness of gear I (2) is equal to that of outer gear II (6), and the thickness of intermediate gear plate (5) is 2 times of the thickness of outer gear I (2). There are wheel hubs at the left and right ends of the middle gear plate (5), and 2 outer gear plates (2, 6) are installed on the left and right wheel hubs of the middle gear plate (5) respectively, and the spring clips (4) on the left and right wheel hubs connect the three gear plates Axial positioning, such as Figure 6 shown.

[0038] There are 4 threaded holes on the intermediate gear plate (5), the centerline of the threaded holes is parallel to the central axis of the gear, and the positions of the...

Embodiment 3

[0042] Embodiment 3 of this anti-backlash gear is as Figure 9 , Figure 10 As shown, its structure is similar to Embodiment 2, and the plane perpendicular to the axis divides the driven wheel into three gear pieces, the outer gear I (2), the outer gear II (6) and the middle gear piece (5), the outer The thickness of gear I (2) is equal to that of outer gear II (6), and the thickness of intermediate gear plate (5) is 2 times of the thickness of outer gear I (2). There are hubs at the left and right ends of the intermediate gear (5), and the two outer gears (2, 6) are installed on the left and right hubs of the intermediate gear (5). positioning, such as Figure 10 shown.

[0043] The anti-backlash mechanism (1b) is installed on the left and right ends of the intermediate gear plate (5), and the positions of the four connecting holes on the intermediate gear plate (5) are the same as those in Embodiment 2, and the connecting holes are threaded holes. The position of the thr...

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PUM

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Abstract

A gap eliminating gear is formed by longitudinally divided gear pieces and a gap eliminating mechanism. The gap eliminating gear is longitudinally divided into three pieces with a plane which is perpendicular to a gear axis; two gear pieces (2, 6) which are arranged on the outer side have the same thickness; the thickness ratio of an intermediate gear piece (5) and a gear piece (2) which is arranged on the outer side can be determined according to a transmission condition and a meshing area; four connecting holes which are parallel to the gear axis are opened on the intermediate gear piece (5); the connecting holes are through holes (pin holes) or thread holes; through holes, kidney-shaped grooves or thread holes are opened on the two gear pieces (2, 6) which are arranged on the outer side and the through holes, the kidney-shaped grooves or the thread holes are corresponding to the connecting holes of the intermediate gear piece (5) and capable of being matched with the connecting holes of the intermediate gear piece (5); and the gap eliminating mechanism (1) which is arranged on a left side and a right side of the intermediate gear piece comprises a thread connecting portion and an eccentric portion. When the gear is meshed and the thread connecting portion is locked, the eccentric portion produces circumference directional thrust on the gear pieces which are arranged on the outer side to enable the intermediate gear piece and the gear pieces which are arranged on the outer side to be staggered, so that transmission gaps are eliminated in transmission.

Description

(1) Technical field [0001] The invention relates to the technical field of gear transmission, in particular to an anti-backlash gear which improves the transmission precision and efficiency and eliminates the gap existing when the gear is reversing due to positive and negative rotation during transmission. (2) Background technology [0002] At present, in terms of eliminating the gear transmission clearance, the method is to use a spring as a loaded force to eliminate the transmission clearance of a pair of meshing gears. For different types of gear transmission, the way of spring loading is different. In bevel gear transmission, the spring force is loaded in the axial direction of a bevel gear to keep a pair of gears in close mesh, thereby eliminating the gap; in spur gear transmission Among them, double gears are used, and the driven wheels of a pair of gears are divided into two gears by a plane perpendicular to the shaft, one of which is fixed on the shaft, and the other...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F16H55/18
Inventor 王斌武
Owner GUILIN UNIV OF AEROSPACE TECH