CN110987417A - Miniature gear durability test bench - Google Patents
Miniature gear durability test bench Download PDFInfo
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- CN110987417A CN110987417A CN201911149832.9A CN201911149832A CN110987417A CN 110987417 A CN110987417 A CN 110987417A CN 201911149832 A CN201911149832 A CN 201911149832A CN 110987417 A CN110987417 A CN 110987417A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M13/00—Testing of machine parts
- G01M13/02—Gearings; Transmission mechanisms
- G01M13/021—Gearings
Abstract
The invention discloses a miniature gear durability test bench which comprises an X-Y optical precision sliding table, a driving motor, a driving shaft, a driven shaft, an X-direction displacement cushion block and a base. The X-Y optical precision sliding table and the X-direction displacement cushion block are mounted on the base, the driving motor is mounted on the X-Y optical precision sliding table, the driving shaft bonded with the micro gear is connected with the driving motor, the driven shaft bonded with the micro gear is mounted above the X-direction displacement cushion block, the two micro gears are meshed by adjusting the X-Y optical precision sliding table and the X-direction displacement cushion block, and the driving motor provides rotating speed for testing. The test bed has small structural size, is simple and convenient to assemble and disassemble, and facilitates the observation of the meshing condition of the micro gear pair by the optical magnifier; meanwhile, the design and bonding mode of the micro gear shaft can meet the requirement of quick installation of the micro gear with the modulus of 0.2mm or below, so that the bonding strength can be effectively guaranteed, and certain coaxiality can be guaranteed.
Description
Technical Field
The invention relates to the field of mechanical transmission, in particular to a miniature gear durability test bench.
Background
The micro gear is one of important components forming the micro speed reducer and the micro transmission mechanism, has the advantages of small volume, light weight, compact transmission, flexible movement and the like, and can realize movement and power transmission in a micro space. At present, the micro gear is mainly applied to light-load occasions such as mobile wearable equipment, instruments and meters, medical equipment and the like. With the continuous development of micro-electro-mechanical systems (MEMS), the micro-gear has a wide application potential in high precision fields such as aerospace, biomedical and the like, and higher requirements are provided for the bearing capacity, transmission precision, reliability and the like of the micro-gear.
Compared with a macro gear, the micro gear is often in a micron-scale and millimeter-scale, and meanwhile, the scale effect and the surface effect are caused by the fact that the geometric characteristic size of the micro gear is too small. The dimensional effects cause the material characteristics such as elastic modulus, tensile strength, fatigue strength and the like to be different from those of the macroscopic structure, and the surface effects cause the surface forces such as van der waals forces, electrostatic forces and the like to be dominant relative to the volume forces in the contact process of the surfaces of the miniature gears. The traditional gear analysis theory established on the basis of elastic mechanics and Hertz theory is not suitable for analyzing the mechanical property of the miniature gear. At present, most of research works related to micro gears at home and abroad are focused on solving the problems of micro gear manufacturing and the like, and the basic problems of the most key motion rule, failure form, mechanical property and the like in the micro gear transmission process are lack of related research, so that the performance evaluation and prediction of the micro gears are difficult, and powerful theory and test support are difficult to provide for the normal operation of a micro gear transmission system. The basic theory research of the micro gear needs to be assisted by related test equipment, and the test equipment has the characteristics of high precision adjustability, high precision loading, high reliability and the like. However, at present, research on miniature gear test beds at home and abroad is almost blank.
Aiming at the problems of unclear knowledge of the failure mode of the micro gear, lack of a related standard evaluation system, lack of test basic data and the like, a test bed aiming at the durability of the micro gear needs to be developed.
Disclosure of Invention
The invention aims to provide a test bed capable of testing the durability of a micro gear with a modulus of 0.2mm or less.
The technical scheme adopted for achieving the purpose of the invention is that the miniature gear durability test bench comprises an X-Y optical precision sliding table, a driving motor, a driving shaft, a driven shaft, an X-direction displacement cushion block and a base.
The base is a rectangular plate horizontally arranged in a rectangular space coordinate system O-XYZ, the length direction of the base is parallel to an X axis, the width direction of the base is parallel to a Y axis, and the thickness direction of the base is parallel to a Z axis.
The X-Y optical precision sliding table and the X-direction displacement cushion block are arranged on the upper surface of the base at intervals and are respectively positioned at two ends of the base in the length direction.
The upper surface of the X-Y optical precision sliding table is provided with a drive end mounting plate, a drive motor support and a drive shaft bearing seat are arranged on the drive end mounting plate, and a drive motor is arranged on the drive motor support. The driving shaft bearing block is positioned at one end, close to the X-direction displacement cushion block, of the driving end mounting plate, an output shaft of the driving motor faces the driving shaft bearing block, the axis of the output shaft of the driving motor is overlapped with the axis of a bearing on the driving shaft bearing block, and the overlapped axis is parallel to the X axis.
An output shaft of the driving motor is connected with a driving shaft through a miniature elastic coupling, and the driving shaft is arranged on a bearing of a driving shaft bearing seat.
The one end that the X direction displacement cushion was installed to the base is provided with a pair of countersunk head guide way, and countersunk head guide way runs through the upper and lower face of base, and the countersunk head guide way is parallel with the X axle.
The lower surface of the X-direction displacement cushion block is provided with a plurality of movable bolts, and the movable bolts are inserted into a pair of countersunk head guide grooves on the base, so that the X-direction displacement cushion block slides along the countersunk head guide grooves through the movable bolts.
The upper surface of the X-direction displacement cushion block is provided with two driven shaft bearing blocks, the bearing axes on the two driven shaft bearing blocks are overlapped, and the overlapped axes are parallel to the X axis.
The driven shaft is arranged on bearings of the two driven shaft bearing seats.
When the micro gear testing device works, one micro gear to be tested is fixed at one end, close to the driven shaft, of the driving shaft, the other micro gear to be tested is fixed at one end, close to the driving shaft, of the driven shaft, and the X-Y optical precision sliding table and the X-direction displacement cushion block are adjusted to enable the two micro gears to be tested to be meshed. And starting the driving motor, and gradually accelerating the speed of the driving motor to the testing rotating speed.
Furthermore, an X displacement fine adjustment knob and a Y displacement fixing knob are respectively arranged on two side walls of the X-Y optical precision sliding table perpendicular to the X axis, and a side wall where the X displacement fine adjustment knob is located is back to the X-direction displacement cushion block. And a Y displacement fine adjustment knob and an X displacement fixing knob are arranged on one side wall of the X-Y optical precision sliding table, which is vertical to the Y axis.
Furthermore, the one end that the driving shaft is close to the driven shaft is provided with a plurality of round platform sections I and cylinder section I coaxial with the driving shaft, and I interval arrangement in a plurality of cylinder sections connects through round platform section I between two adjacent cylinder sections I.
Along the direction of driving shaft towards the driven shaft, the radius of cylinder section I reduces in proper order, and the junction smooth transition of round platform section I and cylinder section I.
Furthermore, one end of the driven shaft, which is close to the driving shaft, is provided with a plurality of circular truncated cone sections II and cylindrical sections II which are coaxial with the driven shaft, the plurality of cylindrical sections II are arranged at intervals, and two adjacent cylindrical sections II are connected through the circular truncated cone sections II.
And the radius of the cylindrical section II is sequentially reduced along the direction of the driven shaft towards the driving shaft, and the joint of the circular truncated cone section II and the cylindrical section II is in smooth transition.
The invention has the beneficial effects that:
1. the test bed has small structural size, is simple and convenient to assemble and disassemble, and facilitates the observation of the meshing condition of the micro gear pair by the optical magnifier;
2. the design and the bonding mode of the micro gear shaft can meet the requirement of quick installation of the micro gear with the modulus of 0.2mm or less, so that the bonding strength can be effectively ensured, and certain coaxiality can be ensured;
3. under the condition of ensuring the high-speed stable transmission of the micro gear, the center distance of the micro gear pair can be adjusted.
Drawings
FIG. 1 is a schematic view of a durability test stand for a micro gear;
FIG. 2 is a schematic view of the connection structure of the X-direction displacement pad and the base;
FIG. 3 is a schematic view of the drive shaft;
fig. 4 is a schematic view of a driven shaft.
In the figure: the device comprises an X-Y optical precision sliding table 1, a Y displacement fine adjustment knob 2, an X displacement fixing knob 3, an X displacement fine adjustment knob 4, a driving end mounting plate 5, a driving motor 6, a driving motor support 7, a miniature elastic coupling 8, a driving shaft bearing seat 9, a Y displacement fixing knob 10, a driving shaft 11, a circular truncated cone section I1101, a cylindrical section I1102, a driven shaft 12, a circular truncated cone section II 1201, a cylindrical section II 1202, a driven shaft bearing seat 13, an X-direction displacement cushion block 14, a base 15 and a moving bolt 16.
Detailed Description
The present invention is further illustrated by the following examples, but it should not be construed that the scope of the above-described subject matter is limited to the following examples. Various substitutions and alterations can be made without departing from the technical idea of the invention and the scope of the invention is covered by the present invention according to the common technical knowledge and the conventional means in the field.
Example 1:
the embodiment discloses a miniature gear durability test bench which comprises an X-Y optical precision sliding table 1, a driving motor 6, a driving shaft 11, a driven shaft 12, an X-direction displacement cushion block 14 and a base 15.
Referring to fig. 1, the base 15 is a rectangular plate horizontally arranged in a rectangular space coordinate system O-XYZ, and the length direction of the base 15 is parallel to the X axis, the width direction is parallel to the Y axis, and the thickness direction is parallel to the Z axis.
The upper surface of the base 15 is provided with an X-Y optical precision sliding table 1 and an X-direction displacement cushion block 14 at intervals, and the X-Y optical precision sliding table 1 and the X-direction displacement cushion block 14 are respectively positioned at two ends of the base 15 in the length direction.
Referring to fig. 1, an X displacement fine adjustment knob 4 and a Y displacement fixing knob 10 are respectively arranged on two side walls of the X-Y optical precision sliding table 1 perpendicular to an X axis, and a side wall where the X displacement fine adjustment knob 4 is located is back to an X-direction displacement cushion block 14. And a Y displacement fine adjustment knob 2 and an X displacement fixing knob 3 are arranged on one side wall of the X-Y optical precision sliding table 1, which is vertical to the Y axis.
Referring to fig. 1, a drive end mounting plate 5 is mounted on the upper surface of the X-Y optical precision sliding table 1, a drive motor support 7 and a drive shaft bearing seat 9 are mounted on the drive end mounting plate 5, and a drive motor 6 is mounted on the drive motor support 7. The driving shaft bearing seat 9 is located at one end, close to the X-direction displacement cushion block 14, of the driving end mounting plate 5, an output shaft of the driving motor 6 faces the driving shaft bearing seat 9, the axis of the output shaft of the driving motor 6 is overlapped with the axis of a bearing on the driving shaft bearing seat 9, and the overlapped axis is parallel to the X axis.
An output shaft of the driving motor 6 is connected with a driving shaft 11 through a miniature elastic coupling 8, and the driving shaft 11 is installed on a bearing of a driving shaft bearing seat 9.
Referring to fig. 3, one end of the driving shaft 11 close to the driven shaft 12 is provided with a plurality of truncated cone sections i 1101 and cylindrical sections i 1102 which are coaxial with the driving shaft 11, the plurality of cylindrical sections i 1102 are arranged at intervals, and two adjacent cylindrical sections i 1102 are connected through the truncated cone sections i 1101.
Along the direction that the driving shaft 11 faces the driven shaft 12, the radius of the cylindrical section I1102 is reduced in sequence, and the joint of the circular truncated cone section I1101 and the cylindrical section I1102 is in smooth transition.
Referring to fig. 2, one end of the base 15, which is provided with the X-direction displacement pad 14, is provided with a pair of countersunk guide grooves, the countersunk guide grooves penetrate through the upper and lower plate surfaces of the base 15, and the countersunk guide grooves are parallel to the X axis.
A plurality of movable bolts 16 are mounted on the lower surface of the X-direction displacement pad 14, and the movable bolts 16 are inserted into a pair of countersunk guide grooves on the base 15, so that the X-direction displacement pad 14 slides along the countersunk guide grooves through the movable bolts 16.
Two driven shaft bearing blocks 13 are mounted on the upper surface of the X-direction displacement cushion block 14, and bearing axes on the two driven shaft bearing blocks 13 are overlapped and are parallel to the X axis.
The driven shaft 12 is mounted on bearings of two driven shaft bearing blocks 13. Referring to fig. 4, one end of the driven shaft 12 close to the driving shaft 11 is provided with a plurality of circular truncated cone segments ii 1201 and cylindrical segments ii 1202 which are coaxial with the driven shaft 12, the plurality of cylindrical segments ii 1202 are arranged at intervals, and two adjacent cylindrical segments ii 1202 are connected through the circular truncated cone segments ii 1201.
Along the direction that the driven shaft 12 faces the driving shaft 11, the radius of the cylindrical section II 1202 is reduced in sequence, and the joint of the circular truncated cone section II 1201 and the cylindrical section II 1202 is in smooth transition.
Referring to fig. 1, when the device works, the driving shaft bearing seat 9, the driven shaft bearing seat 13 and the miniature elastic coupling 8 are firstly loosened, the driving shaft 11 and the driven shaft 12 used in the previous test are taken out, the miniature gears on the driving shaft 11 and the driven shaft 12 are taken down through the debonding of the debonding agent, the bonding ends of the driving shaft 11 and the driven shaft 12 are cleaned through cotton cloth stained with alcohol solution, and the drying is carried out.
The blow-dried bottom of the driving shaft 11 and the driven shaft 12 is fixed through corresponding fixtures, the bonding end of the micro gear faces upwards, the micro gear is clamped by using tweezers to achieve positioning under the operation environment of an optical magnifier, bonding glue is dripped into a fixing gap between the micro gear and the shaft after the micro gear is positioned, after the glue is completely condensed, the driving shaft 11 bonded with the micro gear is arranged in the driving shaft bearing seat 9, the driven shaft 12 bonded with the micro gear is arranged in the driven shaft bearing seat 13, and the driving shaft 11 is connected with a main shaft of the driving motor 6.
And loosening the X-direction displacement cushion block 14, moving the X-direction displacement cushion block to a position to be approached from the two micro gears, fixing the X-direction displacement cushion block, adjusting the Y-displacement fine adjustment knob 2 and the X-displacement fine adjustment knob 4 under the operating condition of the optical magnifier to realize accurate meshing of the micro gear pairs, and fixing the X-direction displacement cushion block by the X-displacement fixing knob 3 and the Y-displacement fixing knob 10. And starting the driving motor 6, and gradually accelerating the speed of the driving motor 6 to the testing rotating speed for testing.
Example 2:
the embodiment discloses a miniature gear durability test bench which comprises an X-Y optical precision sliding table 1, a driving motor 6, a driving shaft 11, a driven shaft 12, an X-direction displacement cushion block 14 and a base 15.
Referring to fig. 1, the base 15 is a rectangular plate horizontally arranged in a rectangular space coordinate system O-XYZ, and the length direction of the base 15 is parallel to the X axis, the width direction is parallel to the Y axis, and the thickness direction is parallel to the Z axis.
The upper surface of the base 15 is provided with an X-Y optical precision sliding table 1 and an X-direction displacement cushion block 14 at intervals, and the X-Y optical precision sliding table 1 and the X-direction displacement cushion block 14 are respectively positioned at two ends of the base 15 in the length direction.
Referring to fig. 1, a drive end mounting plate 5 is mounted on the upper surface of the X-Y optical precision sliding table 1, a drive motor support 7 and a drive shaft bearing seat 9 are mounted on the drive end mounting plate 5, and a drive motor 6 is mounted on the drive motor support 7. The driving shaft bearing seat 9 is located at one end, close to the X-direction displacement cushion block 14, of the driving end mounting plate 5, an output shaft of the driving motor 6 faces the driving shaft bearing seat 9, the axis of the output shaft of the driving motor 6 is overlapped with the axis of a bearing on the driving shaft bearing seat 9, and the overlapped axis is parallel to the X axis.
An output shaft of the driving motor 6 is connected with a driving shaft 11 through a miniature elastic coupling 8, and the driving shaft 11 is installed on a bearing of a driving shaft bearing seat 9.
Referring to fig. 2, one end of the base 15, which is provided with the X-direction displacement pad 14, is provided with a pair of countersunk guide grooves, the countersunk guide grooves penetrate through the upper and lower plate surfaces of the base 15, and the countersunk guide grooves are parallel to the X axis.
A plurality of movable bolts 16 are mounted on the lower surface of the X-direction displacement pad 14, and the movable bolts 16 are inserted into a pair of countersunk guide grooves on the base 15, so that the X-direction displacement pad 14 slides along the countersunk guide grooves through the movable bolts 16.
Two driven shaft bearing blocks 13 are mounted on the upper surface of the X-direction displacement cushion block 14, and bearing axes on the two driven shaft bearing blocks 13 are overlapped and are parallel to the X axis.
The driven shaft 12 is mounted on bearings of two driven shaft bearing blocks 13.
When the test bench works, one micro gear to be tested is fixed at one end of the driving shaft 11 close to the driven shaft 12, the other micro gear to be tested is fixed at one end of the driven shaft 12 close to the driving shaft 11, and the X-Y optical precision sliding table 1 and the X-direction displacement cushion block 14 are adjusted to enable the two micro gears to be tested to be meshed. And starting the driving motor 6, and gradually accelerating the speed of the driving motor 6 to the testing rotating speed.
Example 3:
the main structure of this embodiment is the same as that of embodiment 2, and further, referring to fig. 1, an X displacement fine adjustment knob 4 and a Y displacement fixing knob 10 are respectively disposed on two side walls of the X-Y optical precision sliding table 1 perpendicular to the X axis, and a side wall where the X displacement fine adjustment knob 4 is located is back to the X direction displacement pad 14. And a Y displacement fine adjustment knob 2 and an X displacement fixing knob 3 are arranged on one side wall of the X-Y optical precision sliding table 1, which is vertical to the Y axis. And adjusting the Y displacement fine adjustment knob 2 and the X displacement fine adjustment knob 4 to realize accurate meshing of the micro gear pair, and fixing the micro gear pair through the X displacement fixing knob 3 and the Y displacement fixing knob 10.
Example 4:
the main structure of this embodiment is the same as that of embodiment 3, and further, referring to fig. 3, one end of the driving shaft 11 close to the driven shaft 12 is provided with a plurality of truncated cone sections i 1101 and cylindrical sections i 1102 which are coaxial with the driving shaft 11, the plurality of cylindrical sections i 1102 are arranged at intervals, and two adjacent cylindrical sections i 1102 are connected through the truncated cone sections i 1101.
Along the direction that the driving shaft 11 faces the driven shaft 12, the radius of the cylindrical section I1102 is reduced in sequence, and the joint of the circular truncated cone section I1101 and the cylindrical section I1102 is in smooth transition.
The miniature gear is bonded on the cylindrical section I1102 after being axially positioned through the circular table section I1101.
Example 5:
the main structure of this embodiment is the same as embodiment 4, and further, referring to fig. 4, one end of the driven shaft 12 close to the driving shaft 11 is provided with a plurality of circular truncated cone segments ii 1201 coaxial with the driven shaft 12 and cylindrical segments ii 1202, the plurality of cylindrical segments ii 1202 are arranged at intervals, and two adjacent cylindrical segments ii 1202 are connected through the circular truncated cone segments ii 1201.
Along the direction that the driven shaft 12 faces the driving shaft 11, the radius of the cylindrical section II 1202 is reduced in sequence, and the joint of the circular truncated cone section II 1201 and the cylindrical section II 1202 is in smooth transition.
The miniature gear is adhered to the cylindrical section II 1202 after being axially positioned through the circular table section II 1201.
Claims (4)
1. The utility model provides a miniature gear durability test bench which characterized in that: the X-Y optical precision sliding table comprises an X-Y optical precision sliding table (1), a driving motor (6), a driving shaft (11), a driven shaft (12), an X-direction displacement cushion block (14) and a base (15);
the base (15) is a rectangular plate horizontally arranged in a space rectangular coordinate system O-XYZ, the length direction of the base (15) is parallel to an X axis, the width direction is parallel to a Y axis, and the thickness direction is parallel to a Z axis;
the X-Y optical precision sliding table (1) and the X-direction displacement cushion block (14) are arranged on the upper surface of the base (15) at intervals, and the X-Y optical precision sliding table (1) and the X-direction displacement cushion block (14) are respectively positioned at two ends of the base (15) in the length direction;
a drive end mounting plate (5) is mounted on the upper surface of the X-Y optical precision sliding table (1), a drive motor support (7) and a drive shaft bearing seat (9) are mounted on the drive end mounting plate (5), and a drive motor (6) is mounted on the drive motor support (7); the driving shaft bearing block (9) is positioned at one end, close to the X-direction displacement cushion block (14), of the driving end mounting plate (5), an output shaft of the driving motor (6) faces the driving shaft bearing block (9), the axis of the output shaft of the driving motor (6) is overlapped with the axis of a bearing on the driving shaft bearing block (9), and the overlapped axis is parallel to the X axis;
an output shaft of the driving motor (6) is connected with a driving shaft (11) through a miniature elastic coupling (8), and the driving shaft (11) is arranged on a bearing of a driving shaft bearing seat (9);
one end of the base (15) provided with the X-direction displacement cushion block (14) is provided with a pair of countersunk guide grooves, the countersunk guide grooves penetrate through the upper plate surface and the lower plate surface of the base (15), and the countersunk guide grooves are parallel to the X axis;
the lower surface of the X-direction displacement cushion block (14) is provided with a plurality of movable bolts (16), and the movable bolts (16) are inserted into a pair of countersunk head guide grooves on the base (15), so that the X-direction displacement cushion block (14) slides along the countersunk head guide grooves through the movable bolts (16);
two driven shaft bearing blocks (13) are mounted on the upper surface of the X-direction displacement cushion block (14), and bearing axes on the two driven shaft bearing blocks (13) are overlapped and are parallel to the X axis;
the driven shaft (12) is arranged on bearings of two driven shaft bearing seats (13);
when the micro gear testing device works, one micro gear to be tested is fixed at one end, close to the driven shaft (12), of the driving shaft (11), the other micro gear to be tested is fixed at one end, close to the driving shaft (11), of the driven shaft (12), and the X-Y optical precision sliding table (1) and the X-direction displacement cushion block (14) are adjusted to enable the two micro gears to be tested to be meshed; and starting the driving motor (6), and gradually accelerating the speed of the driving motor (6) to the testing rotating speed.
2. The miniature gear durability test stand of claim 1 wherein: an X displacement fine adjustment knob (4) and a Y displacement fixing knob (10) are respectively arranged on two side walls of the X-Y optical precision sliding table (1) perpendicular to an X axis, and a side wall where the X displacement fine adjustment knob (4) is located is back to an X-direction displacement cushion block (14); and a Y displacement fine adjustment knob (2) and an X displacement fixing knob (3) are arranged on one side wall of the X-Y optical precision sliding table (1) vertical to the Y axis.
3. The miniature gear durability test stand of claim 2 wherein: one end, close to the driven shaft (12), of the driving shaft (11) is provided with a plurality of circular table sections I (1101) and cylindrical sections I (1102) which are coaxial with the driving shaft (11), the cylindrical sections I (1102) are arranged at intervals, and every two adjacent cylindrical sections I (1102) are connected through the circular table sections I (1101);
along the direction that driving shaft (11) is towards driven shaft (12), the radius of cylinder section I (1102) reduces in proper order, and the junction smooth transition of round platform section I (1101) and cylinder section I (1102).
4. The miniature gear durability test stand of claim 1 wherein: one end of the driven shaft (12) close to the driving shaft (11) is provided with a plurality of circular table sections II (1201) and cylindrical sections II (1202) which are coaxial with the driven shaft (12), the cylindrical sections II (1202) are arranged at intervals, and two adjacent cylindrical sections II (1202) are connected through the circular table sections II (1201);
and along the direction of the driven shaft (12) towards the driving shaft (11), the radiuses of the cylindrical sections II (1202) are sequentially reduced, and the connecting parts of the circular truncated cone sections II (1201) and the cylindrical sections II (1202) are in smooth transition.
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