CN113478025B - Free wheel driving mechanism for involute pure rolling generating device - Google Patents
Free wheel driving mechanism for involute pure rolling generating device Download PDFInfo
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- CN113478025B CN113478025B CN202110734299.3A CN202110734299A CN113478025B CN 113478025 B CN113478025 B CN 113478025B CN 202110734299 A CN202110734299 A CN 202110734299A CN 113478025 B CN113478025 B CN 113478025B
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- free wheel
- sliding table
- involute
- rolling
- assembly
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23F—MAKING GEARS OR TOOTHED RACKS
- B23F23/00—Accessories or equipment combined with or arranged in, or specially designed to form part of, gear-cutting machines
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23F—MAKING GEARS OR TOOTHED RACKS
- B23F23/00—Accessories or equipment combined with or arranged in, or specially designed to form part of, gear-cutting machines
- B23F23/12—Other devices, e.g. tool holders; Checking devices for controlling workpieces in machines for manufacturing gear teeth
Abstract
The invention belongs to the technical field of precision machining and testing, and relates to a free wheel driving mechanism for an involute pure rolling generating device. The structure includes: the device comprises a free wheel assembly, an electric linear sliding table, an L plate, an upright column sliding table, an upright column base and a platform; the free wheel assembly is driven to move through the electric linear sliding table, and then the rolling assembly performs pure rolling motion on the guide rail by utilizing the horizontal component of the pressure between the free wheel and the left and right base disks; the outer cylindrical surface of the free wheel is made of polyurethane plastic or rubber with proper hardness and elasticity, so that the influence of factors such as errors of the device, external interference and the like on the processing and measurement of the involute template of the gear can be reduced, the free wheel has certain hardness, and the self precision and the driving precision of the free wheel can be ensured; the stress point and the driving force of the rolling assembly are adjustable; the device can be used for driving a high-precision involute pure rolling generating device and has good market application prospect and popularization value.
Description
Technical Field
The invention belongs to the technical field of precision machining and testing, and relates to a free wheel driving mechanism for a high-precision involute pure rolling generating device.
Background
The involute profile is the gear profile which is most commonly used and mature in machining process at present, and is widely applied to various fields of speed reducers/transmissions, gear cutters, high-end equipment, industrial robots and the like. The device representing the highest machining accuracy of the gear involute is a gear involute template used as a reference for gear involute magnitude transmission. The gear involute sample plate is a standard measuring instrument for calibrating various involute measuring instruments and is mainly used for transmitting gear involute parameter values, correcting instrument indication values and determining instrument indication value errors.
The invention patent (ZL 201510091994.7) discloses a high-precision radial adjustable gear involute sample plate and an adjusting method thereof, the invention patent (ZL 201610847011.2) discloses a gearwheel involute sample plate, and the patent (ZL 201711393983. X) discloses a common normal line gear involute sample plate such as a self-installation reference.
The national standard GB/T6467-2010 of the gear involute template specifies the grade 1 grade and the grade 2 grade of the gear involute template. Tooth profile shape tolerance f of 1-grade gear involute templatefαTCorresponding to the base radius rb≤100mm、100mm<rb≤200mm、200mm<rbLess than or equal to 300mm and 300mm<rbLess than or equal to 400mm is respectively 1.0 μm, 1.4 μm, 1.7 μm and 2.1 μm; the extended length corresponds to the base radius rb100mm, 200mm, 300mm, 400mm should be no less than 70mm, 105mm, 140mm and 160 mm; the surface roughness of the profile surface of the involute teeth is not more than Ra 0.1. The Japanese National Measurement Institute (NMIJ) develops a reference device for measuring an involute by laser, the base radius of a used involute template is 57.5mm, the deviation of the tooth profile shape is 0.5 mu m, and the extension length is 30 mm; in the international comparison of gear sample plates carried out by the national laboratory for gear measurement (NGML) of the university of Nykasel, England in 2004, a gear involute sample plate with the base circle radius of 100mm, the span length of 38mm and the tooth profile shape deviation of 0.2 mu m is provided; federal Germany physical technology research PTB develops a sector bull gear template with the addendum circle diameter of 1000mm in 2009, the involute span length is 120mm, and the deviation of the tooth profile shape is about 1.8 mu m; in 2011, the PTB designs and manufactures a large gear ring standard sample plate with the addendum circle diameter of about 2000mm, the involute span length of the sample plate is about 84mm, and the deviation of the tooth profile shape is about 2 mu m; a standard gear with the addendum circle radius of 64mm, the span length of 30mm and the tooth profile shape deviation of about 1.3 mu m is developed by a high-precision gear research room of university of major graduate; the gear standard device is a gear involute standard device with higher international precision, but the gear standard device does not meet the precision requirement of a 1-grade precision gear involute sample plate;
the processing device and the measuring instrument which meet the requirements of processing and testing the gear involute sample plate with the 1-level precision are not available at home and abroad, and the development of the processing and measuring device which meet the requirements of the gear involute sample plate with the 1-level precision becomes an urgent task.
The straight line rolls around the circle, and the motion trail of any point on the straight line is an involute taking the circle as a base circle, which is the basic generation principle of the involute. The German Federal physical technology research institute (PTB), the Japan national metrology science research institute and the university of the great courseware high-precision gear research laboratory have developed a double-base disc type generating mechanism for measuring a high-precision gear, and the double-base disc type generating mechanism of the German Federal physical technology research institute (PTB) and the Japan national metrology science research institute adopts a rubber soft belt to drive a base disc to perform pure rolling, but the driving speed can cause the vibration of the rubber soft belt to further influence the precision of the pure rolling; the double-base disc type generating mechanism of the high-precision gear research room of the university of major graduates adopts a linear guide rail and two centers to directly drive the center holes at the two ends of a rolling assembly, and as sliding friction is formed between the centers of the centers and the rolling assembly, the driving resistance is large and the precision of pure rolling is not high. The driving mode of the double-base disc type involute pure rolling generating device still has larger lifting space.
Disclosure of Invention
In order to improve the driving precision of the involute pure rolling generating device, the invention provides a free wheel driving mechanism for a high-precision involute pure rolling generating device, which comprises: the device comprises a free wheel assembly, an electric linear sliding table, an L plate, an upright column sliding table, an upright column base and a platform; wherein, the freewheel subassembly includes: the free wheel, the left free wheel bracket, the right free wheel bracket and the adapter plate;
a bearing is arranged in the free wheel; the left and right free wheel brackets are respectively provided with two free wheel positioning grooves with set angles and used for mounting free wheels and adjusting the mounting positions of the free wheels so as to meet the driving requirements of rolling assemblies with different specifications; electronic sharp slip table is fixed on the L board, and the L board is fixed on the stand slip table, and the stand slip table is fixed on the stand base, and the stand base is fixed on the platform.
When the diameter span of the rolling assembly is small, the rolling assemblies of different specifications can be driven by adjusting the upright column sliding table, and when the diameter span of the rolling assembly is large, the rolling assemblies of different specifications can be driven by replacing the upright column base.
By adjusting the relative installation position among all the components and the sizes of all the components, the generatrix of the free wheel is parallel to the positioning baffle plate and the guide rail of the base circular disc when in static state and motion.
The resultant force of the pressure applied to the rolling assembly by the free wheel assembly is adjusted to be 5-50N by adjusting the mounting height of the free wheel assembly.
The free wheel driving mechanism for the high-precision involute pure rolling generating device has the advantages that the free wheel driving mechanism drives the free wheel assembly to move through the electric linear sliding table, and then the horizontal component of the pressure between the free wheel and the left and right base disks is used for driving the rolling assembly to do pure rolling motion on the guide rail, the outer cylindrical surface of the free wheel is made of polyurethane plastic with proper hardness and elasticity, the influence of the motion errors of the free wheel assembly and the electric linear sliding table and the interference of vibration from the driving device and the outside and the like on the involute sample plate of the gear can be weakened, certain hardness is achieved, and the precision of the free wheel and the driving precision can be guaranteed; the free wheel is internally provided with a bearing, and the free wheel autorotates under the action of friction force in the driving process, so that the rolling assembly is not easy to slide relative to the guide rail; the stress point of the rolling assembly can be adjusted by adjusting the installation position of the free wheel, and the pressure of the free wheel on the base disc can be controlled by finely adjusting the position of the upright post sliding table sliding block so as to control the pressure between the rolling assembly and the guide rail; the device can be used for driving a high-precision involute pure rolling generating device and has good market application prospect and popularization value.
Drawings
FIG. 1 is a free wheel drive mechanism for a high precision involute pure roll generating device;
FIG. 2 a freewheel assembly;
FIG. 3 a freewheel;
FIG. 4 a freewheel bracket;
FIG. 5 electric linear slide;
FIG. 6L plate;
FIG. 7 is a column slide;
FIG. 8 is a pure rolling generating device;
in the figure: 1 a freewheel assembly; 1-1 freewheel; 1-1-1 outer cylindrical surface; 1-1-2 free wheel positioning surfaces; 1-2 left freewheel mounts; 1-2-1 freewheel locating slot; 1-2-2 bracket positioning surface; 1-2-3 free wheel positioning surface A; 1-2-4 free wheel positioning surface B; 1-3 right freewheel mounts; 1-4 adapter plates; 2, an electric linear sliding table; 2-1 linear sliding table sliding block; 2-2, a linear sliding table positioning surface; a 3L plate; 3-1, an electric linear sliding table positioning surface; 3-2 reinforcing ribs; 3-3L of plate positioning surface; 4, a column sliding table; 4-1 upright column sliding table sliding block; 4-2, positioning surfaces of the upright column sliding tables; 5, a column base; 6 marble platform; 7 pure rolling generating device; 7-1 rolling component; 7-1-1 left base disc; 7-1-2 right base disc; 7-2 guide rails; 7-3 base disc positioning baffle.
Detailed Description
The invention provides a free wheel driving mechanism for a high-precision involute pure rolling generating device, which comprises: the device comprises a free wheel assembly 1, an electric linear sliding table 2, an L plate 3, an upright column sliding table 4, an upright column base 5 and a marble platform 6; wherein the freewheel assembly 1 comprises: the free wheel comprises 1-1 part of a free wheel, 1-2 parts of left and right free wheel brackets, 1-3 parts of a left and right free wheel brackets and 1-4 parts of an adapter plate.
When the marble platform is installed, the upright column base 5 is screwed on the marble platform 6 through screws, the marble platform 6 adopts 0-grade marble, the working surfaces of the upright column base 5 and the marble platform 6 are both precisely ground, the flatness error of the two working surfaces of the upright column base 5 is not more than 1 micrometer, and the parallelism error between the two working surfaces is not more than 3 micrometers; the vertical column sliding table 4 is a manual sliding table with a locking device, the manual sliding table is screwed on the vertical column base 5 through screws in advance, in the working section of the vertical column sliding table 4, the verticality error between a vertical column sliding table sliding block 4-1 and a vertical column sliding table positioning surface 4-2 is not more than 3 micrometers, the non-axial error in the working section of the vertical column sliding table 4 is not more than 5 micrometers, the vertical column base 5 with the proper height and the vertical column sliding table 4 with the proper stroke are selected according to the specification of the rolling assembly 7-1, when the rolling assemblies 7-1 with different specifications are driven, if the diameter span is small, the rolling assemblies 7-1 with different specifications can be driven by adjusting the vertical column sliding table 4, and when the diameter span is larger than the adjusting range of the vertical column sliding table 4, the rolling assemblies 7-1 with different specifications can be driven by replacing the vertical column base 5.
Pre-screwing an L plate 3 on an upright column sliding table sliding block 4-1 through a screw, precisely grinding an electric linear sliding table positioning surface 3-1 and an L plate positioning surface 3-3 of the L plate 3, wherein the flatness error of the two surfaces is not more than 1 mu m, and the included angle between the two surfaces is slightly less than 90 degrees so as to counteract the deformation generated after the L plate 3 is suspended on the free wheel assembly 1 and the electric linear sliding table 2; the left and right free wheel supports 1-2 and 1-3, the adapter plate 1-4 and the electric linear sliding table 2 are all made of aluminum alloy materials so as to reduce stress deformation of the L plate 3 and prevent the device from overturning, the verticality error between the electric linear sliding table positioning surface 3-1 and the L plate positioning surface 3-3 after the free wheel assemblies 1 and the electric linear sliding table 2 are suspended is not more than 2 mu m, and reinforcing ribs 3-2 are distributed on the L plate 3 so as to improve rigidity.
The outer cylindrical surface 1-1-1 of the free wheel 1-1 is made of polyurethane material with Shore hardness of A70-A90, the length of the outer cylindrical surface 1-1-1 is 1-2mm shorter than the width of the guide rail 8, the outer diameter of the free wheel 1-1 is 30-50mm, the thickness of the polyurethane is 5-8mm, the radial runout error of the outer cylindrical surface 1-1-1 relative to the rotation axis is not more than 3 mu m, and the end face runout error of the positioning surface 1-1-2 of the free wheel relative to the rotation axis is not more than 1 mu m; two free wheel positioning grooves 1-2-1 with an included angle of 120 degrees are processed on the left and right free wheel supports 1-2 and 1-3 and are used for installing the free wheels 1-1 and adjusting the positions of the installed free wheels 1-1 to meet the driving requirements of rolling assemblies 7-1 with different specifications, the left and right free wheel supports 1-2 and 1-3 are respectively and symmetrically provided with two free wheels 1-1, the flatness error of the support positioning surfaces 1-2-2 of the left and right free wheel supports 1-2 and 1-3 is not more than 1 mu m, the perpendicularity error between the support positioning surfaces 1-2-2 and the free wheel positioning surface B1-2-4 is not more than 2 mu m, the parallelism error between the free wheel positioning surface A1-2-3 and the free wheel positioning surface B1-2-4 is not more than 2 mu m, the free wheel 1-1 is provided with external threads and is arranged on the free wheel bracket 1-2 through a nut, the free wheel positioning surface 1-1-2 is contacted with the free wheel positioning surface A1-2-3, and a cross washer or an elastic washer is arranged between the free wheel positioning surface B1-2-4 and the nut, so that the influence of the direct rigid contact between the nut and the free wheel positioning surface B1-2-4 on the positioning precision of the free wheel 1-1 is avoided.
Firstly, installing a free wheel 1-1 at the outermost ends of a left free wheel support 1-2 and a right free wheel support 1-3, symmetrically connecting the left free wheel support 1-2 and the right free wheel support 1-3 on an adapter plate 1-3 through screws to form a free wheel assembly 1, wherein the parallelism error between two positioning surfaces of the adapter plate 1-3 is not more than 2 mu m; the free wheel assembly 1 is arranged on the electric linear sliding table 2 through a screw; the parallelism error of a linear sliding table sliding block 2-1 and a linear sliding table positioning surface 2-2 in the working section of the electric linear sliding table 2 is not more than 3 mu m, and the non-axial error in the working section of the electric linear sliding table 2 is not more than 5 mu m; the electric linear sliding table 2 is connected to the L plate 3 through a screw; the screws involved in the above steps are all pre-tightened.
Adjusting the installation positions of the upright column sliding table 4 and the upright column base 5 to enable the outer cylindrical surface 1-1-1 of the free wheel 1-1 to be positioned in the middle of the guide rail 7-2; adjusting the mounting position of the L plate 3 on the upright post sliding table sliding block 4-1 to ensure that the motion linearity error of the linear sliding table sliding block 2-1 relative to the guide rail 7-2 in the working section of the electric linear sliding table 2 is not more than 10 mu m; adjusting the installation position of the electric linear sliding table 2 to ensure that the motion verticality error between the linear sliding table sliding block 2-1 in the working section and the positioning baffle 7-3 of the base circular disc is not more than 10 mu m; adjusting the positions of a linear sliding table sliding block 2-1 and an upright column sliding table sliding block 4-1 to enable a free wheel 1-1 at one end of a left free wheel support 1-2 and a right free wheel support 1-3 to be in contact with a guide rail 7-2 and a base disc positioning baffle 7-3, observing the contact condition of the free wheel 1-1 with the guide rail 7-2 and the base disc positioning baffle 7-3 through an optical gap method, adjusting the positions of the left free wheel support 1-2 and the right free wheel support 1-3 and an adapter plate 1-4 to enable an outer cylindrical surface 1-1-1 of the free wheel 1-1 to be in contact with the guide rail 7-2 and the base disc positioning baffle 7-3 and to have a uniform blue optical gap; the above-mentioned pre-tightened screws are tightened and the freewheel 1-1 is loosened.
Lifting an upright column sliding table sliding block 4-1, placing a rolling assembly 7-1 on a guide rail 7-2, pressing the rolling assembly 7-1 on a base disc positioning baffle 7-3, putting down the upright column sliding table sliding block 4-1, pressing a free wheel 1-1 to left and right base discs 7-1-1 and 7-1-2, adjusting the installation position of the free wheel 1-1, driving the left and right base discs 7-1-1 and 7-1-2 by two free wheels 1-1 respectively, and enabling the included angle between the contact line of the two free wheels 1-1 and the left and right base discs 7-1-1 and 7-1-2 at the same side and the central axis connecting line of the left and right base discs 7-1-1 and 7-1-2 to be about 60 degrees; in order to ensure that the driving forces of the four free wheels 1-1 are basically consistent, the contact state of the free wheel 1-1 and the left and right base disks 7-1-1 and 7-1-2 is observed by using a light gap method, and the free wheel 1-1 is screwed when uniform blue light gaps exist between the free wheel 1-1 and the left and right base disks 7-1-1 and 7-1-2; the pressing force of the free wheel 1-1 on the left base disc 7-1-1 and the right base disc 7-1-2 can be adjusted by adjusting the position of the upright column sliding table sliding block 4-1, so that the pressure between the rolling component 7-1 and the guide rail 7-2 is adjusted, and the resultant force of the pressure applied to the rolling component 7-1 by the free wheel component 1 is 5-50N.
When the device is used, the electric linear sliding table 2 drives the free wheel assembly 1 to move, and then the horizontal component of the pressure between the free wheel 1-1 and the left and right base disks 7-1-1 and 7-1-2 is utilized to drive the rolling assembly 7-1 to roll on the guide rail 7-2.
Claims (5)
1. A free wheel actuating mechanism for involute pure roll generating device, its characterized in that includes: the device comprises a free wheel assembly (1), an electric linear sliding table (2), an L plate (3), an upright column sliding table (4), an upright column base (5) and a platform (6); wherein the freewheel assembly (1) comprises: the device comprises a free wheel (1-1), a left free wheel bracket (1-2), a right free wheel bracket (1-3) and an adapter plate (1-4);
a bearing is arranged in the free wheel (1-1); the left and right free wheel supports are respectively provided with two free wheel positioning grooves (1-2-1) with set angles and used for mounting the free wheels (1-1) and adjusting the mounting positions of the free wheels (1-1) to meet the driving requirements of rolling assemblies (7-1) with different specifications, the left and right free wheel supports are respectively provided with two symmetrical free wheels (1-1), the left and right free wheel supports are symmetrically fixed on the adapter plate (1-4) to form the free wheel assembly (1), and the free wheel assembly (1) is fixed on the electric linear sliding table (2) through the adapter plate; electric linear sliding table (2) is fixed on L plate (3), L plate (3) is fixed on upright column sliding table (4), upright column sliding table (4) is fixed on upright column base (5), and upright column base (5) is fixed on platform (6).
2. The free wheel driving mechanism for involute pure rolling generating device according to claim 1, wherein the material of the outer cylindrical surface (1-1-1) is polyurethane plastic or rubber.
3. The free wheel drive mechanism for an involute pure rolling generating device of claim 1, wherein: by adjusting the relative installation position among all the components and the size of all the components, the bus of the friction outer cylindrical surface (1-1-1) of the free wheel (1-1) is parallel to the base circular disc positioning baffle (7-3) and the guide rail (7-2) when in static state and moving state; the free wheel assembly (1) is driven to move through the electric linear sliding table (2), and then the horizontal component of the pressure between the free wheel (1-1) and the left and right base disks is utilized to drive the rolling assembly (7-1) to do pure rolling motion on the guide rail (7-2); the stress point of the rolling component (7-1) is adjusted by adjusting the installation position of the free wheel (1-1), and the pressure of the free wheel (1-1) on the left base disc and the right base disc is controlled by finely adjusting the position of the upright post sliding table sliding block (4-1) so as to control the size of positive pressure between the rolling component (7-1) and the guide rail; the rolling assemblies (7-1) with different specifications are driven by adjusting the upright column sliding table (4) or replacing the upright column base (5).
4. The free wheel drive mechanism for an involute pure rolling generating device of claim 1, wherein: by adjusting the relative installation position among all the components and the sizes of all the components, the generatrix of the free wheel is parallel to the positioning baffle plate and the guide rail of the base circular disc when in static state and motion.
5. The free wheel drive mechanism for an involute pure rolling generating device of claim 1, wherein: the resultant force of the pressure applied to the rolling assembly by the free wheel assembly is adjusted to be 5-50N by adjusting the mounting height of the free wheel assembly.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202110734299.3A CN113478025B (en) | 2021-06-30 | 2021-06-30 | Free wheel driving mechanism for involute pure rolling generating device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110734299.3A CN113478025B (en) | 2021-06-30 | 2021-06-30 | Free wheel driving mechanism for involute pure rolling generating device |
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| CN113478025A CN113478025A (en) | 2021-10-08 |
| CN113478025B true CN113478025B (en) | 2022-03-29 |
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| DE2724602A1 (en) * | 1977-06-01 | 1978-12-07 | Reishauer Ag | METHOD FOR CONTROLLING A GEAR MACHINING MACHINE AND DEVICE FOR EXECUTING THE METHOD |
| CN1923419A (en) * | 2005-08-31 | 2007-03-07 | 湖南中大创远数控装备有限公司 | Large mode number helical awl gear cutting machine |
| JP2010179456A (en) * | 2009-02-09 | 2010-08-19 | Deckel Maho Pfronten Gmbh | Apparatus for forming and machining workpiece clamped within machine tool, and method for manufacturing workpiece having gear |
| CN102233462A (en) * | 2011-04-15 | 2011-11-09 | 大连吉润高新技术机械有限公司 | Improved transmission system of gear milling machine based on numerical control (NC) technology |
| CN102500835A (en) * | 2011-11-11 | 2012-06-20 | 大连理工大学 | Ultrasonic strengthening device for gear tooth surfaces of involute cylindrical gears |
-
2021
- 2021-06-30 CN CN202110734299.3A patent/CN113478025B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2724602A1 (en) * | 1977-06-01 | 1978-12-07 | Reishauer Ag | METHOD FOR CONTROLLING A GEAR MACHINING MACHINE AND DEVICE FOR EXECUTING THE METHOD |
| CN1923419A (en) * | 2005-08-31 | 2007-03-07 | 湖南中大创远数控装备有限公司 | Large mode number helical awl gear cutting machine |
| JP2010179456A (en) * | 2009-02-09 | 2010-08-19 | Deckel Maho Pfronten Gmbh | Apparatus for forming and machining workpiece clamped within machine tool, and method for manufacturing workpiece having gear |
| CN102233462A (en) * | 2011-04-15 | 2011-11-09 | 大连吉润高新技术机械有限公司 | Improved transmission system of gear milling machine based on numerical control (NC) technology |
| CN102500835A (en) * | 2011-11-11 | 2012-06-20 | 大连理工大学 | Ultrasonic strengthening device for gear tooth surfaces of involute cylindrical gears |
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