Scissor gear assembly of engine balance shaft
A technology for balancing shafts and engines, applied to belts/chains/gears, mechanical equipment, transmission parts, etc., can solve problems such as waste, difficult after-sales maintenance, and increased costs
Inactive Publication Date: 2022-04-08
CHONGQING CHANGAN AUTOMOBILE CO LTD
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AI Technical Summary
Problems solved by technology
[0004] The limit pin or the limit card 5 has no effect after assembly, resulting in cost increase and waste, and the installation and disassembly of the limit pin or the limit card 5 all cause an increase in process cost
In addition, this kind of scissors gear assembly is extremely difficult for after-sales maintenance; when the scissors gear assembly is assembled on the engine, the limit card 5 has been removed, and this component is not on the engine. 10 and the original auxiliary gear 20 are rotated to the corresponding tooth positions, and then the original main gear 10 and the original auxiliary gear 20 are blocked by the after-sales special limit card 5
Therefore, existing scissors gear assembly structure needs to be improved urgently
Method used
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[0029] The technical scheme of the present invention will be described in detail below in conjunction with the accompanying drawings.
[0030] see figure 2 , image 3 , Figure 4 with Figure 5 The scissors gear assembly of the balance shaft of the engine shown includes the main gear 1 and the auxiliary gear 2 overlapping with it. The gear 2 is provided with a fitting hole 21 on the spoke portion near the gear teeth, and the fitting hole 21 is coaxially corresponding to the mounting hole 11 on the main gear 1; The installation hole 11 is interference fit, and the other end is clearance fit with the fit hole 21 on the pinion 2, and the fit clearance is t 1 ;This scissors gear assembly cancels the original limit card, uses positioning pins to fix the main gear and auxiliary gears to the installation state, and does not need to take out the positioning pins after the scissors gears are assembled, and the positioning pins do not affect the work of the scissors gears; It incl...
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The invention relates to a scissor gear assembly of an engine balance shaft, which comprises a main gear and an auxiliary gear overlapped and matched with the main gear, and is characterized in that a mounting hole is formed in a spoke part, close to gear teeth, of the main gear, a matching hole is formed in a spoke part, close to the gear teeth, of the auxiliary gear, and the matching hole coaxially corresponds to the mounting hole in the main gear; one end of the positioning pin is in interference fit with the mounting hole in the main gear, the other end of the positioning pin is in clearance fit with the matching hole in the auxiliary gear, and the matching clearance is t1; the C-shaped spring is arranged between the main gear and the auxiliary gear, the positioning pin is clamped by the two ends of the C-shaped spring, so that the positioning pin is attached to one side of the matching hole in the auxiliary gear, and the main gear and the auxiliary gear are staggered by a certain angle. It can be guaranteed that the main gear and the auxiliary gear are convenient to assemble, work normally and maintain, and many defects caused by arrangement of limiting pins or limiting clamps are overcome.
Description
technical field [0001] The invention relates to an automobile engine, in particular to a scissor gear assembly of an engine balance shaft. Background technique [0002] At present, the scissor gear assembly is more and more widely used on the balance shaft of the automobile engine. The purpose of using the scissor gear assembly is to load a certain spring force between the main gear and the auxiliary gear, so that the main gear and the auxiliary gear are relatively staggered by a certain angle. Eliminate the backlash between the scissors gear assembly and the drive gear, thereby reducing gear meshing noise. However, the main gear and the auxiliary gear of the scissors gear assembly are staggered by a certain angle, which has a relatively large impact on the installation of the scissors gear assembly. [0003] see figure 1 The existing scissors gear assembly shown includes the original main gear 10 and the original auxiliary gear 20, and is usually provided with a component...
Claims
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IPC IPC(8): F16H55/17F16H57/028F16B19/02
Inventor 韦颂邢淑霞肖欣徐丽茹吴先非伍建撰黄志敏
Owner CHONGQING CHANGAN AUTOMOBILE CO LTD