CN114352712A - Forced lubrication noise reduction device for scissor tooth balance shaft module of automobile engine - Google Patents
Forced lubrication noise reduction device for scissor tooth balance shaft module of automobile engine Download PDFInfo
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- CN114352712A CN114352712A CN202111543011.0A CN202111543011A CN114352712A CN 114352712 A CN114352712 A CN 114352712A CN 202111543011 A CN202111543011 A CN 202111543011A CN 114352712 A CN114352712 A CN 114352712A
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- 238000005461 lubrication Methods 0.000 title claims abstract description 38
- 230000009467 reduction Effects 0.000 title description 5
- 230000001050 lubricating effect Effects 0.000 claims abstract description 15
- 238000007731 hot pressing Methods 0.000 claims abstract description 4
- 239000003921 oil Substances 0.000 claims description 54
- 239000010687 lubricating oil Substances 0.000 claims description 30
- 238000005259 measurement Methods 0.000 claims description 11
- 230000008030 elimination Effects 0.000 claims description 7
- 238000003379 elimination reaction Methods 0.000 claims description 7
- 230000004048 modification Effects 0.000 claims description 6
- 238000012986 modification Methods 0.000 claims description 6
- 230000005540 biological transmission Effects 0.000 claims description 4
- 238000010183 spectrum analysis Methods 0.000 description 5
- 230000000694 effects Effects 0.000 description 3
- 239000004519 grease Substances 0.000 description 3
- 238000009434 installation Methods 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 244000145845 chattering Species 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 210000001503 joint Anatomy 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
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Abstract
A forced lubricating and noise reducing device for a scissor tooth balance shaft module of an automobile engine is characterized in that a crankshaft gear ring, a balance shaft scissor tooth and a balance shaft gear are all of helical tooth structures, and the crankshaft gear ring is installed on a crankshaft handle in a hot-pressing mode. The balance shaft scissors teeth, the balance shaft gear, the balance shaft main shaft, the balance shaft auxiliary shaft, the scissors teeth torsion springs, the wave-shaped sheets and the bearing bushes are sequentially arranged on the balance shaft shell to form a balance shaft module, and the balance shaft module is screwed and fixed by 8M 8 bolts. Then the balance shaft module and the crankshaft assembly are assembled on a cylinder body to work, a crankshaft gear ring is meshed with scissors teeth of the balance shaft module, and the corrugated sheet, the scissors teeth clearance eliminating auxiliary teeth, the scissors teeth main teeth and the scissors teeth torsion springs are sequentially arranged on a balance shaft main shaft; and the scissors tooth gap eliminating auxiliary teeth and the scissors tooth main teeth are arranged on the balance shaft shell. The invention solves the problem of meshing noise between gears by automatically adjusting the clearance between the gears and applying a forced lubrication structure at the meshing part of the tooth surfaces, and is applied to the technical field of automobile engines.
Description
Technical Field
The invention relates to a forced lubricating and noise reducing device for a scissor tooth balance shaft module of an automobile engine in the technical field of automobile engines.
Background
At present, with the improvement of living standard of people, automobiles become popular commodities and walk into thousands of households. The increasing production capacity of automobiles in China leads the competition among manufacturers of large automobiles to be more and more intense. Under the condition of almost constant price, higher performance becomes a popular object. Engines with high power, large torque and light structure become the mainstream of the market. However, on the premise of higher power and torque, normal use performance of parts of the engine is difficult to guarantee. For example, in the mounting and matching of the balance shaft of the engine, the engine has high power and high torque. The chattering phenomenon occurs when the engine is not equipped with the balance shaft. When the balance shaft is installed, the installation steps are complicated and the overall size is overlarge due to the influence of the process manufacturing dimensional tolerance. At present, a balance shaft module is used on an engine to solve the problems that the engine shakes and the installation steps are complicated, but the problems caused by the problem are that if a gear directly drives a balance shaft, the meshing clearance between the gears is difficult to adjust and complicated, and the noise generated by the driving between the gears is difficult to achieve a comfortable degree. Therefore, how to solve the problems of the clearance control between the gears of the engine balance shaft module and the meshing noise between the gears becomes a subject to be researched urgently.
Patent No. 200520009778.5 discloses a gear transmission structure with continuous lubrication and noise reduction effects, which is different from the present invention in that: this patent discloses a set up a lubricating oil and hinder the piece just in front of meshing gear separation department, make and hinder piece and two meshing gears enclose into an area, lubricating grease throws away at a high speed when the gear high-speed is rotatory and forms a high pressure district in the area that encloses, makes the lubricating grease speed of department of splashing become zero under the effect of hindering, because the high pressure effect again with grease along the gear backlash of two gear rotary motion directions pressfitting to reach the function of lubricating and making an uproar. The invention discloses a scissors tooth gear meshing forced lubrication structure, wherein a lubrication oil path of the lubrication structure is formed by adding phi 3 lubrication oil holes on a balance shaft main shaft 4 and balance shaft scissors teeth 2, the phi 3 lubrication oil holes are obliquely drilled on the balance shaft scissors teeth 2, and forced lubrication between gear meshing tooth surfaces is achieved by supplying oil pressure.
Patent No. 201620293711.7 discloses a forced lubrication oil path structure in a planetary gear box, which is different from the present invention in that: the patent discloses that at least one group of planetary gear trains are included in a planetary gear box, each stage of planetary gear train is provided with an independent forced lubrication oil inlet, in respective independent forced lubrication oil passages, each stage of planetary rotating frame bearing and planetary gear inner bearing are respectively provided with an inner lubrication oil passage through a planetary rotating frame, each stage of planetary gear train forced lubrication oil inlet is positioned on a gear box body, an oil inlet on the box body is connected with an inner oil passage on a rotating frame bearing seat through a metal oil pipe, an inner oil passage of the planetary frame bearing seat is in butt joint with an inner oil passage of the planetary frame through an oil separating seat and a slip ring, and the inner lubrication oil passage in the planetary frame is jointly composed of the planetary gear inner bearing and a sun gear lubrication oil passage. The forced lubrication mode greatly reduces the oil storage amount in the gear box, reduces the power consumption of the planet carrier in motion and improves the efficiency of the gear box. The invention discloses a gear-meshed shear tooth balance shaft module, which is characterized in that phi 3 lubricating oil holes are additionally formed in a balance shaft main shaft 4 and balance shaft shear teeth 2, so that lubricating oil flows into a balance shaft shell, passes through the balance shaft main shaft 4 and the balance shaft shear teeth 2, is sprayed out from the lubricating oil holes in the balance shaft shear teeth 2, and reaches the gear-meshed surface of the balance shaft shear teeth, and the gear-meshed lubricating and noise reducing functions are achieved.
Patent No. 201810018372.5 discloses a balance shaft bearing lubrication structure, which is different from the present invention in that: this patent discloses be equipped with balanced axle dead eye on the crankcase body, one side of crankcase body is equipped with the oil collecting chamber, the opposite side of crankcase body is equipped with annular oil groove, annular oil groove is located the terminal surface of balanced axle dead eye, through establishing the connection oil duct intercommunication on the crankcase body between oil collecting chamber and the annular oil groove, the oil collecting chamber is located the top of balanced axle dead eye. The balance shaft bearing lubricating structure of this patent can force the lubricated balance shaft bearing, the effectual life who prolongs the bearing. The invention discloses a gear-meshed shear tooth balance shaft module, which is characterized in that phi 3 lubricating oil holes are additionally formed in a balance shaft main shaft 4 and balance shaft shear teeth 2, so that lubricating oil flows into a balance shaft shell, passes through the balance shaft main shaft 4 and the balance shaft shear teeth 2, is sprayed out from the lubricating oil holes in the balance shaft shear teeth 2, and reaches the gear-meshed surface of the balance shaft shear teeth, and the gear-meshed lubricating and noise reducing functions are achieved.
Therefore, the development of a forced lubrication noise reduction device for a scissor tooth balance shaft module of an automobile engine is a new problem to be solved urgently.
Disclosure of Invention
The invention aims to provide a forced lubrication noise reduction device for a scissor tooth balance shaft module of an automobile engine.
The purpose of the invention is realized as follows: a forced lubricating and noise reducing device for a scissor tooth balance shaft module of an automobile engine comprises a crankshaft gear ring, a balance shaft scissor tooth, a balance shaft helical tooth gear, a balance shaft main shaft, a balance shaft auxiliary shaft, a balance shaft shell, a scissor tooth torsion spring, a corrugated sheet, a bearing bush, an adjusting device, a scissor tooth gap eliminating auxiliary tooth and a scissor tooth main tooth, wherein the crankshaft gear ring, the balance shaft scissor tooth and the balance shaft gear are all in helical tooth structures, and the crankshaft gear ring is installed on a crankshaft handle in a hot-pressing mode; sequentially mounting the scissors teeth of the balance shaft, the gear of the balance shaft, the main shaft of the balance shaft, the auxiliary shaft of the balance shaft, the torsion springs of the scissors teeth, the corrugated sheets and the bearing bush on a shell of the balance shaft to form a balance shaft module, and screwing and fixing the balance shaft module by 8M 8 bolts; then the balance shaft module and the crankshaft assembly are assembled on a cylinder body to work, a crankshaft gear ring is meshed with scissors teeth of the balance shaft module, a corrugated sheet, scissors teeth clearance eliminating auxiliary teeth, scissors teeth main teeth and scissors teeth torsion springs are sequentially arranged on a balance shaft main shaft, and an adjusting device is arranged on the balance shaft main shaft; the scissors teeth of the balance shaft consist of scissors tooth clearance elimination auxiliary teeth and scissors tooth main teeth, and the scissors tooth clearance elimination auxiliary teeth and the scissors tooth main teeth are arranged on the balance shaft shell;
the crankshaft gear ring, the balance shaft shear teeth and the balance shaft gear are all of helical tooth structures, the modulus of the gear is 1.45, the helix angle is 24.4 degrees, the pressure angle is 17.5 degrees, the full tooth width of the balance shaft helical tooth gear is 14mm, the full tooth width of the crankshaft gear ring is 14mm, the tooth width of the gap eliminating auxiliary tooth of the shear tooth is 4mm, the tooth width of the main tooth of the shear tooth is 10mm, the torque of the torsional spring of the shear tooth is 14N.m-18N.m, the common normal length of the shear tooth gear is 29.23mm, and the measurement mode is 7-tooth span; the tooth profile modification amount of the helical gear in the tooth direction of the helical gear is 0.001-0.007mm, the modification coefficient of the balance shaft shear tooth gear is 0.1985, the meshing center distance between the balance shaft shear tooth and the crankshaft gear ring is 110.2mm, and the meshing center distance between the balance shaft shear tooth and the balance shaft helical gear is 73.8 mm;
the spiral direction of the shear teeth of the balance shaft is left-handed, the spiral direction of the helical tooth gear of the balance shaft is right-handed, the spiral direction of the crankshaft gear ring is right-handed, the main shaft of the balance shaft and the shear teeth of the balance shaft are provided with phi 3 lubricating oil holes, in view of the self structure of the shear teeth of the balance shaft, the phi 3 lubricating oil holes are obliquely drilled, so that forced lubrication between the tooth surfaces of the meshing teeth of the gears is carried out, and the main shaft of the balance shaft is provided with an adjusting device capable of adjusting the flow of the oil holes; the adjusting device is a screw with an external thread, and the diameter of the oil outlet is adjusted through the screwing depth of the screw, so that the outlet flow of the lubricating oil is adjusted; lubricating oil flows to the position of the bearing bush from the oil inlet hole along the oil path of the shell, enters phi 3 lubricating oil holes in the main shaft of the balance shaft and the scissors teeth of the balance shaft from the position of the bearing bush, and is sprayed out from the phi 3 lubricating oil holes in the scissors teeth of the balance shaft, so that forced lubrication between gear meshing is achieved; the balance shaft module is mounted in a mode that the balance shaft module is screwed at the lower end of the cylinder body through 6M 8 bolts and 2M 6 bolts and exists in the oil pan; the scissor teeth in the balance shaft module are arranged between the crankshaft gear ring and the balance shaft gear; the crankshaft gear ring is hot-pressed on a crankshaft handle according to mark points, the interference magnitude of the press-fitting is 0.062-0.117, the transmission torque of the crankshaft gear ring is more than 310N.m, the balance shaft scissors teeth and the balance shaft gear are assembled on a balance shaft shell to form a balance shaft module, and the balance shaft module is installed at the lower end of a cylinder body to ensure that the crankshaft gear ring, the balance shaft scissors teeth and the balance shaft gear are normally meshed; therefore, the special self structure of the scissors teeth of the balance shaft and the forced oil supply and lubrication structure of the lubrication oil path to the tooth surface of the helical gear enable the helical gear scissors teeth balance shaft module to achieve automatic adjustment of the side clearance between the crankshaft gear ring and the scissors teeth of the balance shaft and reduce gear meshing noise between the crankshaft gear ring and the scissors teeth of the balance shaft.
The key point of the invention lies in the product structure, the working principle and the operation method.
Compared with the prior art, the forced lubricating and noise reducing device for the scissor tooth balance shaft module of the automobile engine has the advantages that the gap between gears is automatically adjusted, the problem of meshing noise between the gears is solved by applying a forced lubricating structure at the meshing part of the tooth surfaces, and the like, and is widely applied to the technical field of automobile engines.
Drawings
The present invention will be described in detail below with reference to the accompanying drawings and examples.
Fig. 1 is a schematic structural view of the present invention.
Fig. 2 is a perspective assembly view of a first embodiment of a balance shaft spindle portion of the present invention.
Fig. 3 is a schematic structural view of a first embodiment of a main shaft portion of a balance shaft of the present invention.
Fig. 4 is a schematic structural view of a second embodiment of the main shaft portion of the balance shaft of the present invention.
Fig. 5 is a schematic structural view of the scissor tooth part of the balance shaft of the invention.
Fig. 6 is a perspective assembly view of a prior art balance shaft.
Fig. 7 is a graph of a spectrum analysis of NVH measurement results of the lubricating oil hole of the present invention.
Fig. 8 is a graph of a spectral analysis of the measurement results of the oilless hole NVH of the present invention.
Detailed Description
Referring to the attached drawings, the forced lubricating and noise reducing device for the scissor tooth balance shaft module of the automobile engine comprises a crankshaft gear ring 1, balance shaft scissor teeth 2, a balance shaft helical tooth gear 3, a balance shaft main shaft 4, a balance shaft auxiliary shaft 5, a balance shaft shell 6, a scissor tooth torsion spring 7, a corrugated sheet 8, a bearing bush 9, an adjusting device 10, a scissor tooth gap eliminating auxiliary tooth 11 and a scissor tooth main tooth 12, wherein the crankshaft gear ring 1, the balance shaft scissor teeth 2 and the balance shaft gear 3 are all in helical tooth structures, and the crankshaft gear ring 1 is installed on a crankshaft 6 handle in a hot-pressing mode; sequentially mounting a balance shaft scissor tooth 2, a balance shaft gear 3, a balance shaft main shaft 4, a balance shaft auxiliary shaft 5, a scissor tooth torsion spring 7, a corrugated sheet 8 and a bearing bush 9 on a balance shaft shell 6 to assemble a balance shaft module, screwing and fixing by using 8M 8 bolts, then assembling the balance shaft module and a crankshaft assembly on a cylinder body to work, and meshing a crankshaft gear ring 1 with the balance shaft module scissor tooth 2; the wavy sheet 8, the scissors tooth clearance elimination auxiliary teeth 11, the scissors tooth main teeth 12 and the scissors tooth torsion springs 7 are sequentially arranged on the balance shaft main shaft 4, and the balance shaft main shaft 4 is provided with an adjusting device 10; the balance shaft scissors teeth 2 are composed of scissors teeth clearance elimination auxiliary teeth 2-1 and scissors teeth main teeth 2-2, and the scissors teeth clearance elimination auxiliary teeth 2-1 and the scissors teeth main teeth 2-2 are installed on a balance shaft shell 6.
The crankshaft gear ring 1, the balance shaft scissors teeth 2 and the balance shaft gear 3 are all of helical tooth structures, the modulus of the gear is 1.45, the helix angle is 24.4 degrees, the pressure angle is 17.5 degrees, the full tooth width of the balance shaft helical tooth gear 3 is 14mm, the full tooth width of the crankshaft gear ring 1 is 14mm, the tooth width of the scissors tooth backlash eliminating auxiliary tooth 11 is 4mm, the tooth width of the scissors tooth main tooth 2-2 is 10mm, the torque of the scissors tooth torsion spring 7 is 14N.m-18N.m, the common line length of the scissors tooth gear is 29.23mm, and the measurement mode is measurement across 7 teeth; the tooth profile modification amount of the helical gear in the tooth direction of the helical gear is 0.001-0.007mm, the modification coefficient of the balance shaft shear tooth gear is 0.1985, the center distance of meshing of the balance shaft shear tooth 2 and the crankshaft gear ring 1 is 110.2mm, and the center distance of meshing of the balance shaft shear tooth 2 and the balance shaft helical gear 3 is 73.8 mm.
The spiral direction of the balance shaft scissor teeth 2 is left-handed, the spiral direction of the balance shaft helical tooth gear 3 is right-handed, the spiral direction of the crankshaft gear ring 1 is right-handed, phi 3 lubricating oil holes are formed in the balance shaft main shaft 4 and the balance shaft scissor teeth 2 (in view of the self structure of the balance shaft scissor teeth 2, the phi 3 lubricating oil holes are obliquely drilled), forced lubrication between gear meshing tooth surfaces is carried out, and the balance shaft main shaft 4 is provided with an adjusting device 10 capable of adjusting the flow of the oil holes; the adjusting device 10 is a screw with an external thread, and the diameter of the oil outlet is adjusted through the screwing depth of the screw, so that the outlet flow of the lubricating oil is adjusted; lubricating oil flows to the position of the bearing bush from the oil inlet hole along the oil path of the shell, enters phi 3 lubricating oil holes in the balance shaft main shaft 4 and the balance shaft scissors teeth 2 from the position of the bearing bush, and is sprayed out from the phi 3 lubricating oil holes in the balance shaft scissors teeth 2, so that forced lubrication between gear meshing is achieved; the balance shaft module is mounted in a mode that the balance shaft module is screwed at the lower end of the cylinder body through 6M 8 bolts and 2M 6 bolts and exists in the oil pan; the shear teeth 2 in the balance shaft module are arranged between the crankshaft gear ring 1 and the balance shaft gear 3; the crankshaft gear ring 1 is hot-pressed on a crank shaft 6 according to mark points, the interference magnitude of press mounting is 0.062-0.117, the transmission torque of the crankshaft gear ring 1 is more than 310N.m, the balance shaft scissors teeth 2 and the balance shaft gear 3 are assembled on a balance shaft shell to form a balance shaft module, and the balance shaft module is arranged at the lower end of a cylinder body to ensure that the crankshaft gear ring 1, the balance shaft scissors teeth 2 and the balance shaft gear 3 are normally meshed; therefore, through the unique self structure of the scissors teeth 2 of the balance shaft and the forced oil supply and lubrication structure of the lubrication oil path to the tooth surface of the helical gear, the helical gear scissors teeth balance shaft module can achieve the automatic adjustment of the side clearance between the crankshaft gear ring 1 and the scissors teeth 2 of the balance shaft and reduce the gear meshing noise between the crankshaft gear ring 1 and the scissors teeth 2 of the balance shaft.
Example one
Referring to fig. 3, the scissor-tooth balance shaft module is installed in place according to the installation manner of fig. 1, and the balance shaft scissor teeth 2 are installed between the crankshaft gear ring 1 and the balance shaft gear 3. Then automatically adjusting the clearance between the crankshaft gear ring 1 and the balance shaft gear 2. In addition, 3mm oil holes corresponding to each other are respectively formed in the balance shaft main shaft 4 and the balance shaft scissors teeth 2, and a plug 11 is arranged at the front end of the balance shaft main shaft 4 to ensure that oil flows in from the shaft bushing (the rear end) and flows out from the balance shaft scissors teeth 2 (the front end), so that the tooth surfaces of the balance shaft scissors teeth 2 are lubricated. The noise generated by the gear meshing of the balance shaft scissors teeth 2 and the crankshaft gear ring 1 is reduced by forcedly lubricating the gear tooth surfaces of the balance shaft scissors teeth 2 and the crankshaft gear ring 1.
Example two
Referring to fig. 5, the structure of fig. 3 is improved, an oil hole flow adjusting device 10 is arranged at the front end of a balance shaft main shaft 4, an internal thread with the length of 28mm is arranged at the front end of the balance shaft main shaft 4, a screw matched with the internal thread at the front end of the balance shaft main shaft 4 is arranged at the same time, the screw is screwed into the oil hole of the balance shaft main shaft 4 with the length of 27mm, the opening size of the oil hole is controlled through the screwing depth of the screw, the flow outflow size in the oil hole is realized, and the tooth surface lubrication of the balance shaft scissors teeth 2 is realized through the controllable oil quantity. The noise generated by the meshing of the balance shaft scissors teeth 2 and the crankshaft gear ring 1 is reduced through the forced lubrication of the tooth surfaces. And finally, the requirement of the engine on realizing higher NVH performance under the design condition of compact structure is met.
The following is balance axis module NVH measurement data (spectral analysis):
fig. 7 is a graph showing a spectrum analysis of the NVH measurement result of the lubricating oil hole of the present invention.
Fig. 8 is a graph showing a spectrum analysis of NVH measurement results of the lubrication oil hole-free structure according to the present invention.
And (4) conclusion: (1) and the NVH measurement result of the lubricating oil hole shows that the gear meshing noise is about 70 dB. (2) And the NVH measurement result of the non-lubricating oil hole shows that the gear meshing noise is about 90 dB. To sum up: the gear meshing noise is obviously improved by having a lubricating oil path for forced lubrication.
Claims (3)
1. The utility model provides a device of making an uproar falls in scissors tooth balance shaft module forced lubrication of automobile engine, includes bent axle ring gear, balance shaft scissors tooth, balance shaft skewed tooth gear, balance shaft main shaft, balance shaft countershaft, balance shaft casing, scissors tooth torsional spring, wave form piece, axle bush, adjusting device, scissors tooth backlash auxiliary tooth, scissors tooth owner tooth, its characterized in that: the crankshaft gear ring, the balance shaft scissors teeth and the balance shaft gear are all in helical tooth structures, and the crankshaft gear ring is installed on a crankshaft handle in a hot-pressing mode; sequentially mounting the scissors teeth of the balance shaft, the gear of the balance shaft, the main shaft of the balance shaft, the auxiliary shaft of the balance shaft, the torsion springs of the scissors teeth, the corrugated sheets and the bearing bush on a shell of the balance shaft to form a balance shaft module, and screwing and fixing the balance shaft module by 8M 8 bolts; then the balance shaft module and the crankshaft assembly are assembled on a cylinder body to work, a crankshaft gear ring is meshed with scissors teeth of the balance shaft module, a corrugated sheet, scissors teeth clearance eliminating auxiliary teeth, scissors teeth main teeth and scissors teeth torsion springs are sequentially arranged on a balance shaft main shaft, and an adjusting device is arranged on the balance shaft main shaft; the scissors teeth of the balance shaft consist of scissors tooth gap elimination auxiliary teeth and scissors tooth main teeth, and the scissors tooth gap elimination auxiliary teeth and the scissors tooth main teeth are arranged on the balance shaft shell.
2. The forced lubricating and noise reducing device for the scissor tooth balance shaft module of the automobile engine as claimed in claim 1, wherein: the crankshaft gear ring, the balance shaft shear teeth and the balance shaft gear are all of helical tooth structures, the modulus of the gear is 1.45, the helix angle is 24.4 degrees, the pressure angle is 17.5 degrees, the full tooth width of the balance shaft helical tooth gear is 14mm, the full tooth width of the crankshaft gear ring is 14mm, the tooth width of the gap eliminating auxiliary tooth of the shear tooth is 4mm, the tooth width of the main tooth of the shear tooth is 10mm, the torque of the torsional spring of the shear tooth is 14N.m-18N.m, the common normal length of the shear tooth gear is 29.23mm, and the measurement mode is 7-tooth span; the tooth profile modification amount of the helical gear in the tooth direction of the gear is 0.001-0.007mm, the modification coefficient of the balance shaft shear tooth gear is 0.1985, the meshing center distance between the balance shaft shear tooth and the crankshaft gear ring is 110.2mm, and the meshing center distance between the balance shaft shear tooth and the balance shaft helical gear is 73.8 mm.
3. The forced lubricating and noise reducing device for the scissor tooth balance shaft module of the automobile engine as claimed in claim 1, wherein: the spiral direction of the shear teeth of the balance shaft is left-handed, the spiral direction of the helical tooth gear of the balance shaft is right-handed, the spiral direction of the crankshaft gear ring is right-handed, the main shaft of the balance shaft and the shear teeth of the balance shaft are provided with phi 3 lubricating oil holes, in view of the self structure of the shear teeth of the balance shaft, the phi 3 lubricating oil holes are obliquely drilled, so that forced lubrication between the tooth surfaces of the meshing teeth of the gears is carried out, and the main shaft of the balance shaft is provided with an adjusting device capable of adjusting the flow of the oil holes; the adjusting device is a screw with an external thread, and the diameter of the oil outlet is adjusted through the screwing depth of the screw, so that the outlet flow of the lubricating oil is adjusted; lubricating oil flows to the position of the bearing bush from the oil inlet hole along the oil path of the shell, enters phi 3 lubricating oil holes in the main shaft of the balance shaft and the scissors teeth of the balance shaft from the position of the bearing bush, and is sprayed out from the phi 3 lubricating oil holes in the scissors teeth of the balance shaft, so that forced lubrication between gear meshing is achieved; the balance shaft module is mounted in a mode that the balance shaft module is screwed at the lower end of the cylinder body through 6M 8 bolts and 2M 6 bolts and exists in the oil pan; the scissor teeth in the balance shaft module are arranged between the crankshaft gear ring and the balance shaft gear; the crankshaft gear ring is hot-pressed on a crankshaft handle according to mark points, the interference magnitude of the press-fitting is 0.062-0.117, the transmission torque of the crankshaft gear ring is more than 310N.m, the balance shaft scissors teeth and the balance shaft gear are assembled on a balance shaft shell to form a balance shaft module, and the balance shaft module is installed at the lower end of a cylinder body to ensure that the crankshaft gear ring, the balance shaft scissors teeth and the balance shaft gear are normally meshed; therefore, the special self structure of the scissors teeth of the balance shaft and the forced oil supply and lubrication structure of the lubrication oil path to the tooth surface of the helical gear enable the helical gear scissors teeth balance shaft module to achieve automatic adjustment of the side clearance between the crankshaft gear ring and the scissors teeth of the balance shaft and reduce gear meshing noise between the crankshaft gear ring and the scissors teeth of the balance shaft.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111543011.0A CN114352712A (en) | 2021-12-16 | 2021-12-16 | Forced lubrication noise reduction device for scissor tooth balance shaft module of automobile engine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111543011.0A CN114352712A (en) | 2021-12-16 | 2021-12-16 | Forced lubrication noise reduction device for scissor tooth balance shaft module of automobile engine |
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| CN114352712A true CN114352712A (en) | 2022-04-15 |
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|---|---|---|---|
| CN202111543011.0A Pending CN114352712A (en) | 2021-12-16 | 2021-12-16 | Forced lubrication noise reduction device for scissor tooth balance shaft module of automobile engine |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102817839A (en) * | 2012-09-06 | 2012-12-12 | 上海航发机械有限公司 | Oil drain pump body lubricating oil channel of internal meshed gear pump |
| CN203979333U (en) * | 2014-07-02 | 2014-12-03 | 北京遥感设备研究所 | The adjustable target seeker servomechanism of a kind of axial clearance clearance elimination gear |
| CN205841670U (en) * | 2016-07-08 | 2016-12-28 | 昆明云内动力股份有限公司 | A kind of clearance elimination gear structure of electromotor |
| CN108678829A (en) * | 2018-08-04 | 2018-10-19 | 山东华源莱动内燃机有限公司 | A kind of gear lubrication system of diesel engine |
| CN113309818A (en) * | 2021-05-28 | 2021-08-27 | 广西玉柴机器股份有限公司 | Engine balance shaft structure |
-
2021
- 2021-12-16 CN CN202111543011.0A patent/CN114352712A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102817839A (en) * | 2012-09-06 | 2012-12-12 | 上海航发机械有限公司 | Oil drain pump body lubricating oil channel of internal meshed gear pump |
| CN203979333U (en) * | 2014-07-02 | 2014-12-03 | 北京遥感设备研究所 | The adjustable target seeker servomechanism of a kind of axial clearance clearance elimination gear |
| CN205841670U (en) * | 2016-07-08 | 2016-12-28 | 昆明云内动力股份有限公司 | A kind of clearance elimination gear structure of electromotor |
| CN108678829A (en) * | 2018-08-04 | 2018-10-19 | 山东华源莱动内燃机有限公司 | A kind of gear lubrication system of diesel engine |
| CN113309818A (en) * | 2021-05-28 | 2021-08-27 | 广西玉柴机器股份有限公司 | Engine balance shaft structure |
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