CN215909874U - High anti-vibration force tuning gyroscope driving support structure - Google Patents
High anti-vibration force tuning gyroscope driving support structure Download PDFInfo
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- CN215909874U CN215909874U CN202122346672.6U CN202122346672U CN215909874U CN 215909874 U CN215909874 U CN 215909874U CN 202122346672 U CN202122346672 U CN 202122346672U CN 215909874 U CN215909874 U CN 215909874U
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Abstract
The utility model discloses a high-vibration-resistance tuning gyroscope driving support structure, which comprises a shell, a driving shaft, an inner joint, an outer joint, a bearing, a rotor and a stator, wherein the driving shaft is arranged on the shell; the stator is fixed in the shell, the center in the shell is provided with a pair of bearings, the front part of the driving shaft is arranged on the bearings, the rotor is arranged in the stator and sleeved at the tail part of the driving shaft, and the tail end of the driving shaft is fixed with the rotor through a nut; the front end of the driving shaft is provided with an inner joint, four groups of first thin neck holes are formed in the inner joint to form four first thin necks, and the thin neck directions of two opposite first thin necks are overlapped; four groups of second thin neck holes are formed in the outer connector to form four second thin necks, and the thin neck directions of the two opposite second thin necks are overlapped; the outer joint is sleeved and fixed outside the inner joint, so that the thin neck direction of the first thin neck is vertical to the thin neck direction of the second thin neck. The support structure increases the stability of shafting vibration transmission, controls the amplification magnitude of vibration transmission and greatly improves the vibration resistance of the whole gyroscope.
Description
Technical Field
The utility model relates to the technical field of structural design of a dynamically tuned gyroscope, in particular to a driving support structure of a high-vibration-resistance dynamically tuned gyroscope.
Background
The dynamic tuning gyroscope is a two-degree-of-freedom gyroscope which suspends a gyroscope rotor by utilizing a flexible support and compensates the elastic rigidity of the support by utilizing the dynamic effect generated by the flexible support, and has the remarkable advantages of low cost, small volume, light weight and good precision; however, the flexible support thin neck is extremely thin and is easily damaged by external force impact, so that the whole vibration resistance of the gyroscope is not strong.
Because the existing novel weapon system puts forward higher requirements on the use environment of the single gyroscope, improvement needs to be carried out on the aspect of the structural design of the gyroscope so as to improve the anti-vibration performance of the gyroscope and expand the application field of the dynamic tuning gyroscope.
SUMMERY OF THE UTILITY MODEL
In order to solve the above problems in the prior art, the present invention provides a high anti-vibration tuned gyroscope drive support structure.
The technical problem to be solved by the utility model is realized by the following technical scheme:
a high anti-vibration force tuned gyroscope drive support structure comprising: the device comprises a shell, a driving shaft, an inner joint, an outer joint, a bearing, a rotor and a stator; wherein the content of the first and second substances,
the stator is fixed in the shell, a pair of bearings is arranged in the center in the shell, the front part of the driving shaft is arranged on the bearings, the rotor is arranged in the stator and sleeved at the tail part of the driving shaft, and the tail end of the driving shaft is fixed with the rotor through a nut;
the front end of the driving shaft is provided with an inner joint, four groups of first thin neck holes distributed in a cross shape are formed in the inner joint to form four first thin necks, and the thin neck directions of two opposite first thin necks are overlapped;
four groups of second thin neck holes distributed in a cross shape are formed in the external connector to form four second thin necks, and the thin neck directions of two opposite second thin necks are overlapped;
the outer joint is sleeved and fixed outside the inner joint, and the thin neck direction of the first thin neck is perpendicular to the thin neck direction of the second thin neck.
Further, the span between the bearings is 8-9 mm.
Further, the bearing is a retainer ring type angular contact bearing.
Further, the diameters of the first fine neck hole and the second fine neck hole are both 1.6 mm.
Furthermore, the inner connector is provided with a positioning hole, and the outer connector is provided with a positioning surface.
The utility model has the beneficial effects that:
1. the driving support structure improves the support rigidity, reduces the occupation ratio of a thin neck weak area, improves the consistency of joint processing and the assembly precision, and amplifies the vibration transmission in the instrument to effectively control the vibration transmission;
2. the driving support structure increases the stability of shafting vibration transmission, controls the amplification magnitude of vibration transmission, and simultaneously enhances the mechanical property of the flexible support, thereby greatly improving the vibration resistance of the whole gyroscope.
The present invention will be described in further detail with reference to the accompanying drawings and examples.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a schematic structural view of the nipple;
FIG. 3 is a schematic structural diagram of the external joint;
FIG. 4 is a schematic view of the inner joint and the outer joint after assembly.
Description of reference numerals:
1-a shell; 2-a drive shaft; 3-inner joint; 4-external joint; 5-a bearing; 6-a rotor; 7-a stator; 8-a nut; 9-a gyroscopic rotor; 3-1-first narrow neck hole; 3-2-first narrow neck; 3-3-positioning holes; 4-1-second narrow neck hole; 4-2-second narrow neck; 4-3-positioning surface.
Detailed Description
The present invention will be described in further detail with reference to specific examples, but the embodiments of the present invention are not limited thereto.
Referring to fig. 1 to fig. 4, an embodiment of the present invention discloses a driving support structure of a tuned gyroscope with high anti-vibration force, which specifically includes: the device comprises a shell 1, a driving shaft 2, an inner joint 3, an outer joint 4, a bearing 5, a rotor 6 and a stator 7; wherein the content of the first and second substances,
the stator 7 is fixed in the shell 1, a pair of bearings 5 are arranged in the center of the shell 1, and the bearings are adhered to the shell 1; the front part of the driving shaft 2 is mounted on the bearing 5, the rotor 6 is arranged in the stator 7 and sleeved at the tail part of the driving shaft 2, and the tail end of the driving shaft 2 is fixed with the rotor 6 through a nut 8;
the front end of the driving shaft 2 is provided with an inner joint 3, four groups of first thin neck holes 3-1 distributed in a cross shape are arranged on the inner joint 3 to form four first thin necks 3-2, and the thin neck directions of two opposite first thin necks 3-2 are overlapped;
four groups of second thin neck holes 4-1 distributed in a cross shape are formed in the outer joint 4 to form four second thin necks 4-2, and the thin neck directions of two opposite second thin necks 4-2 are overlapped;
the outer joint 4 is sleeved and fixed on the outer part of the inner joint 3, and the thin neck direction of the first thin neck 3-2 is vertical to the thin neck direction of the second thin neck 4-2.
In the traditional design, for the convenience of assembly, a motor shaft is connected with a joint pull rod, two-stage vibration transmission connection amplification of a driving shaft and the pull rod and the joint exists in the middle, and the coaxiality of shafting installation is also deteriorated due to two-stage clearance fit; the utility model directly designs the motor shaft and the inner joint into a whole, the transmission path is changed from the original shell → the bearing → the driving shaft → the joint into the shell → the bearing → the joint, the vibration transmission link is reduced, and simultaneously, the inner joint 3 and the driving shaft 2 are integrally formed, the coaxiality of a shafting is strictly ensured, and the vibration transmission amplification is inhibited.
Further, the bearing span between the two bearings 5 is 8-9 mm.
Due to the limitation of assembly factors, the bearing 5 and the driving shaft 2 are in small clearance fit, the fit clearance is 0-2 mu m, and vibration transmission amplification caused by overlarge clearance is prevented; drive shaft 2 is supported by two bearings 5 about by, because there is clearance fit bearing 5 and drive shaft 2, there is the internal clearance bearing 5 self, and drive shaft 2 must have the vibration when microcosmically going up radial vibration, causes the vibration magnitude of joint end to enlarge, enlarges in order to reduce the vibration magnitude of magnitude that drive shaft 2 swings and causes, increases the bearing span between two bearings 5 to 8 ~ 9mm, guarantees the stability of motor shafting.
Further, the bearing 5 is a retainer ring type angular contact bearing.
The conventional angular contact ball bearing needs a certain preload when working, if the preload is too small, the free clearance is larger, and the free clearance is changed under the conditions of axial force and radial force, so that the position of the gyro rotor 9 around the driving shaft 2 is unstable, and if the preload is too large, the friction force of the bearing is increased, and the service life of the bearing is influenced; the utility model ensures the consistency and the proper magnitude of the bearing assembling pretightening force by installing the bearing by the process shaft and controlling the deformation of the bearing under the rated pretightening force load, and the motor shaft is reloaded after the bearing is installed, thereby ensuring the proper magnitude of the bearing pretightening force in the instrument assembling process.
The angular contact ball bearings applied to the conventional dynamically tuned gyroscope are all separated, so that the bearings are required to be installed again when the gyroscope is required to be disassembled for the second time, and the operation difficulty is high. Meanwhile, after the gyroscope is designed by adopting an integrated shaft, the bearing pretightening force can be measured only by means of a process shaft, and the operation is difficult when the shaft is secondarily installed by adopting a conventional angular contact ball bearing; the structure can realize free installation of the inner ring shaft without the bearing falling apart by selecting the retainer ring type angular contact bearing, thereby facilitating the control operation of the bearing pretightening force.
Further, in order to reduce the length of the thin neck region part and simultaneously increase the flexibility rigidity of the thin neck, the diameter of the first thin neck hole and the diameter of the second thin neck hole are 1.6 mm.
The weak point of the flexible support is a flexible thin neck, and the theoretical calculation is carried out by taking the center of the thin neck as a support point, but the calculation is actually a thin and long rib formed by two small circular holes. The slender ribs are easy to bend and deform, and the integral vibration resistance is influenced, so that the original diameter of the narrow neck hole with the diameter of 2mm is reduced to 1.6mm, the length of the narrow neck is effectively reduced, the ratio of the weak part is reduced, and the integral vibration resistance is improved.
The thin neck directions of the opposite first thin neck holes 3-1 on the inner joint 3 are overlapped; the thin neck directions of the opposite second thin neck holes 4-1 on the outer joint 4 are overlapped. The relative thin neck hole can be processed and formed at one time, so that the processing error of the thin neck is reduced, and the coincidence of the centers of the thin necks is ensured.
The thin neck holes of the inner joint and the outer joint are processed by a boring machine to ensure the thickness dimension and precision requirement of the thin neck, the boring precision is ensured to be 2 mu m, and the thickness error of the thin neck is not more than 2 mu m.
Furthermore, the inner joint 3 is provided with a positioning hole 3-3 with a diameter of 1mm, the outer joint 4 is provided with a positioning surface 4-3, and the positioning hole 3-3 and the positioning surface 4-3 enable the assembly precision of the inner joint 3 and the outer joint 4 to be not more than 10'.
The inner joint positioning hole 3-3 and the outer joint positioning surface 4-3 are processed at one time in the procedure of processing the inner joint and outer joint thin neck hole, so that the processing error caused by tool disassembly and repeated positioning is avoided.
Before the assembly of the inner joint and the outer joint, temperature cycle stabilization treatment is carried out, and the processing stress is fully released. During assembly, high-strength epoxy resin glue is coated in local areas of the inner joint and the outer joint, a special tool is adopted to ensure positioning accuracy, the inner joint 3 is rotated after a positioning surface 4-3 of the outer joint 4 is close to a reference surface, and a positioning pin is inserted into a positioning hole 3-3 with the diameter of 1mm of the inner joint 3 by means of the tool, so that the inner joint 3 is positioned; and (3) after the assembly is finished, putting the assembly and the tool into a high-temperature box, preserving heat for 4 hours at the temperature of 75 ℃, solidifying the epoxy resin glue, finishing the bonding of the inner joint and the outer joint, and then performing laser welding on the gap between the upper end face and the lower end face of the inner joint and the outer joint to finish the assembly.
The supporting structure improves the supporting rigidity, reduces the proportion of thin neck weak areas, improves the consistency and the assembling precision of joint processing, effectively controls the vibration transmission amplification in the instrument, tests show that the vibration amplification magnitude of the unoptimized joint part of the gyroscope is 8-9 times, and the vibration amplification magnitude of the optimized joint part is 3-4 times, thereby playing an obvious control effect.
After the technology is adopted, the vibration resistance of the gyroscope is greatly improved, the gyroscope can withstand the random vibration of 14g for a long time, and the gyroscope has excellent engineering application value.
The foregoing is a more detailed description of the utility model in connection with specific preferred embodiments and it is not intended that the utility model be limited to these specific details. For those skilled in the art to which the utility model pertains, several simple deductions or substitutions can be made without departing from the spirit of the utility model, and all shall be considered as belonging to the protection scope of the utility model.
Claims (5)
1. A high anti-vibration force tuned gyroscope drive support structure, comprising: the device comprises a shell (1), a driving shaft (2), an inner joint (3), an outer joint (4), a bearing (5), a rotor (6) and a stator (7); wherein the content of the first and second substances,
the stator (7) is fixed in the shell (1), a pair of bearings (5) is arranged in the center of the shell (1), the front part of the driving shaft (2) is installed on the bearings (5), the rotor (6) is arranged in the stator (7) and sleeved at the tail part of the driving shaft (2), and the tail end of the driving shaft (2) is fixed with the rotor (6) through a nut (8);
the front end of the driving shaft (2) is provided with an inner joint (3), four groups of first thin neck holes (3-1) distributed in a cross shape are formed in the inner joint (3) to form four first thin necks (3-2), and the thin neck directions of two opposite first thin necks (3-2) are overlapped;
four groups of second thin neck holes (4-1) distributed in a cross shape are formed in the outer joint (4) to form four second thin necks (4-2), and the thin neck directions of two opposite second thin necks (4-2) are overlapped;
the outer joint (4) is sleeved and fixed outside the inner joint (3), and the thin neck direction of the first thin neck (3-2) is perpendicular to the thin neck direction of the second thin neck (4-2).
2. The high anti-vibration force tuned gyroscope drive support structure according to claim 1 characterized in that the span between the bearings (5) is 8-9 mm.
3. High anti-vibration force tuned gyroscope drive support structure according to claim 2 characterized in that the bearing (5) is a circlip angular contact bearing.
4. A high anti-vibration force tuned gyroscope drive support structure according to claim 1 or 2 or 3 characterized in that the first (3-1) and second (4-1) narrow neck holes are each 1.6mm in diameter.
5. High anti-vibration tuned gyroscope drive support structure according to claim 4 characterized in that the inner joint (3) is provided with locating holes (3-3) and the outer joint (4) is provided with locating surfaces (4-3).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122346672.6U CN215909874U (en) | 2021-09-27 | 2021-09-27 | High anti-vibration force tuning gyroscope driving support structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122346672.6U CN215909874U (en) | 2021-09-27 | 2021-09-27 | High anti-vibration force tuning gyroscope driving support structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215909874U true CN215909874U (en) | 2022-02-25 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202122346672.6U Active CN215909874U (en) | 2021-09-27 | 2021-09-27 | High anti-vibration force tuning gyroscope driving support structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN215909874U (en) |
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2021
- 2021-09-27 CN CN202122346672.6U patent/CN215909874U/en active Active
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