CN212158464U - Circular grating compensation device - Google Patents
Circular grating compensation device Download PDFInfo
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- CN212158464U CN212158464U CN202020787225.7U CN202020787225U CN212158464U CN 212158464 U CN212158464 U CN 212158464U CN 202020787225 U CN202020787225 U CN 202020787225U CN 212158464 U CN212158464 U CN 212158464U
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Abstract
A circular grating compensation device comprises a detected bearing seat arranged in a base, a detected shaft is arranged in the detected bearing seat, a detected bearing is fixedly arranged between the detected bearing seat and the detected shaft through a detected shaft bearing cover and a detected shaft nut, one end of the detected shaft is connected with a handle, the other end of the detected shaft is connected with a transition shaft, the transition shaft is connected with one end of a grating shaft through an elastic shaft, the grating shaft is sleeved with a grating bearing seat, a grating bearing is fixedly arranged between the grating shaft and the grating bearing seat through the grating shaft bearing cover and the grating shaft nut, the other end of the grating shaft is connected with a grating seat, a circular grating is sleeved on the grating seat, and a reading head seat and a reading head are arranged on the end face of the grating bearing seat outside the circular grating; 6 gaskets are uniformly distributed between the base and the bearing seat to be measured. When the output accuracy of the circular grating is tested, a gasket is arranged between a bearing seat to be tested and a base so as to simulate the variation of a shaft system to be tested along the axial direction due to the influence of temperature.
Description
Technical Field
The utility model relates to a circular grating compensation arrangement.
Background
Common angle sensors include circular gratings, circular induction synchronizers, time gratings, rotary transformers and the like, wherein the circular gratings are widely applied to the fields of precision instruments, coordinate measurement, precise positioning, high-precision machining and the like as a precision measurement tool. Because manufacturing and installation errors cause deviation between actual output accuracy of the circular grating and system accuracy of the circular grating, the current measures for correcting the output error of the circular grating mainly comprise two aspects: (1) under the condition that the measured axis system is fixed, reducing the eccentric error of the circular grating by using a dial indicator as much as possible; (2) and (3) measuring the reading of the circular grating rotating the measured shaft for one circle by using the autocollimator and the polygon, and correcting the system error of the shaft system by using the measured data. However, this method is only suitable for the case where the ambient temperature of the measured axis system is constant and the system error output of the measured axis system is stable. For example, in the development process of the inertial navigation test equipment, the incubator is often fixed with the inner frame, and the working table surface for installing the inertial navigation is located inside the incubator, so that the frame fixed with the incubator deforms due to the rise and fall of the temperature of the incubator, the measured shaft is driven to deform along the axial direction, and finally the circular grating moves along the axial direction and the radial direction, so that the output precision of the circular grating under the working condition is unstable and inaccurate.
SUMMERY OF THE UTILITY MODEL
The utility model discloses its aim at provides a circular grating compensation arrangement to solve the problem among the above-mentioned background art.
The technical scheme adopted for achieving the purpose is that the circular grating compensation device comprises a detected bearing seat arranged in a base, a detected shaft is arranged in the detected bearing seat, a detected bearing is fixedly arranged between the detected bearing seat and the detected shaft through a detected shaft bearing cover and a detected shaft nut, one end of the detected shaft is connected with a handle, the other end of the detected shaft is connected with a transition shaft, the transition shaft is connected with one end of a grating shaft through an elastic shaft, the grating shaft is sleeved with a grating bearing seat fixed on the base, a grating bearing is fixedly arranged between the grating shaft and the grating bearing seat through a grating shaft bearing cover and a grating shaft nut, the other end of the grating shaft is connected with a grating seat, a circular grating is sleeved on the grating seat, and a reading head seat and a reading head are arranged on the outer side of the circular grating and are arranged on the end face of the grating bearing seat; 6 gaskets are uniformly distributed between the base and the bearing seat to be measured.
In the utility model, the elastic shaft comprises a grating shaft connecting end, the two sides of the grating shaft connecting end are symmetrically connected with a groove structure, and the groove structure is connected with a transition shaft connecting lug; the elastic shaft is a coupling which is deformable in the axial direction and can transmit the rotation angle of the measured shaft in the circumferential tangential direction.
The utility model discloses in, 6 gaskets be the height gasket such as 6 that install between by survey bearing frame and base for the simulation is surveyed the axle and is followed the axial extension or the change volume that shortens.
Advantageous effects
Compared with the prior art, the utility model has the following advantages.
1. The utility model can simulate the axial deformation of the measured shaft before the circular grating is formally installed on the device, can truly output the interference factors to the parts connected with the measured shaft, and can timely verify the output precision of the circular grating component;
2. the utility model adds the transition shaft and the elastic shaft between the measured shaft and the grating shaft, and filters the axial interference from the measured shaft by utilizing the self characteristic of the elastic shaft;
3. the utility model discloses a circle grating has increased one set of independent accurate shafting, has further kept apart the interference factor who comes from the measured axle, at this moment only needs to improve the gyration precision of circle grating shafting and the installation accuracy of circle grating just can guarantee the output precision of circle grating.
Drawings
Fig. 1 is a schematic diagram of a front-end three-dimensional cross-sectional structure of the present invention;
fig. 2 is a schematic diagram of a rear-end three-dimensional cross-sectional structure of the present invention;
fig. 3 is a front three-dimensional view of the present invention;
fig. 4 is a rear three-dimensional view of the present invention;
FIG. 5 is a three-dimensional view of the elastic shaft of the present invention;
fig. 6 is a three-dimensional view of the base of the present invention;
shown in the figure: 1. the device comprises a gasket, 2, a base, 3, a handle, 4, a measured shaft, 5, a measured shaft bearing cover, 6, a measured bearing seat, 7, a measured bearing, 8, a measured shaft nut, 9, a transition shaft, 10, an elastic shaft, 11, a grating shaft, 12, a grating bearing, 13, a grating bearing seat, 14, a reading head seat, 15, a reading head, 16, a circular grating, 17, a grating seat, 18, a grating shaft nut, 19, a grating shaft bearing cover, 101, a grating shaft connecting end, 102, a groove structure and 103, and a transition shaft connecting lug.
Detailed Description
In order to make the technical means, creation features, achievement purposes and functions of the present invention easy to understand and understand, the present invention is further explained by combining with the specific drawings.
A circular grating compensation device, as shown in figures 1-6, comprises a bearing seat 6 to be measured installed in a base 2, a measured shaft 4 is arranged in the measured bearing seat 6, a measured bearing 7 is fixedly arranged between the measured bearing seat 6 and the measured shaft 4 through a measured shaft bearing cover 5 and a measured shaft nut 8, one end of the measured shaft 4 is connected with a handle 3, the other end of the measured shaft 4 is connected with a transition shaft 9, the transition shaft 9 is connected with one end of a grating shaft 11 through an elastic shaft 10, the grating shaft 11 is sleeved with a grating bearing seat 13, a grating bearing 12 is fixedly arranged between the grating shaft 11 and the grating bearing seat 13 through a grating shaft bearing cover 19 and a grating shaft nut 18, the other end of the grating shaft 11 is connected with a grating seat 17, a circular grating 16 is sleeved on the grating seat 17, a reading head seat 14 is installed on the circular grating 16, and a reading head 15 is arranged on one side of the reading head seat 14; 6 gaskets 1 are uniformly distributed between the base 2 and the bearing pedestal 6 to be measured.
The elastic shaft 10 comprises a grating shaft connecting end 101, groove structures 102 are symmetrically connected to two sides of the grating shaft connecting end 101, and the groove structures 102 are connected with transition shaft connecting lugs 103; the elastic shaft 10 is a coupling which is deformable in the axial direction and can transmit the rotation angle of a measured shaft in the circumferential tangential direction.
The 6 gaskets 1 are 6 equal-height gaskets arranged between the bearing seat 6 to be measured and the base 2 and are used for simulating the variation of the axial extension or contraction of the shaft to be measured.
In the simulation of the actual working condition, the measured shaft has a deformation of 0.05 mm-0.2 mm along the axial direction due to the temperature change, and the deformation is transmitted to the transition shaft; an elastic shaft is arranged between the transition shaft and the grating shaft, and the deformation transmitted along the axial direction of the measured shaft is isolated, so that the influence of the deformation on the precision of the circular grating is prevented. And an independent precise circular grating shaft system is added to the circular grating assembly, so that the rotation precision of the circular grating shaft system and the installation precision of the circular grating are improved, and the output precision of the circular grating can be improved and stabilized.
In the utility model, when the gasket 1 is specifically manufactured, 4 groups of gaskets 1 are firstly manufactured, each group of gaskets 1 is 6 gaskets with equal height and equal thickness, and the thicknesses of the 4 groups of gaskets 1 are respectively 0.05mm, 0.1mm, 0.15mm and 0.2 mm; when the output accuracy of the circular grating is tested, 4 groups of gaskets 1 are sequentially arranged between a bearing seat 6 to be tested and a base 2 so as to simulate the variation of a shaft system to be tested along the axial direction due to the influence of temperature; a pair of precise measured bearings 7 are installed in a measured bearing seat 6, a measured shaft 4 is installed in the measured bearings 7, the measured bearings 7 are axially fixed by a measured shaft bearing cover 5 and a measured shaft nut 8 respectively, a handle 3 is installed at the left end of the measured shaft 4 to facilitate rotation of the measured shaft 4, a transition shaft 9 is installed at the right end of the measured shaft 4 to transmit all information of the measured shaft 4 to a grating shaft 11; in order to filter the axial movement of the measured shaft 4, an elastic shaft 10 is arranged between the transition shaft 9 and the grating shaft 11 so as to protect the grating shaft 11 from external interference factors to the maximum extent; specifically, a grating bearing seat 13 is arranged at the right end of a base 2, a grating bearing 12 is arranged inside the grating bearing seat 13, the grating bearing 12 and a grating shaft 11 are locked by a grating shaft nut 18, and a grating shaft bearing cover 19 is used for fixing the grating bearing 12 to prevent the grating bearing 12 from moving axially; and then sequentially calibrating a grating seat 17 and a circular grating 16 by a dial indicator, installing the grating seat 17 at the right end of the grating shaft 11, fixing the circular grating 16 on the excircle of the grating seat 17, and adjusting the height and the radial position of a reading head seat 14 by a reading head 15 to optimize the output signal of the circular grating 16.
The utility model discloses in the specific use, fix base 2 subaerial, pack into a set of gasket 1 and measured bearing frame 6 in proper order at the left end of base 2, pack into a pair of measured bearing 7 in measured bearing frame 6 inside, the inner circle of measured bearing 7 inserts measured axle 4 and is measured the inner circle of bearing 7 with two 8 axial locks of measured axle nut, measured axle bearing cap 5 and measured bearing frame 6 are fixed and compress tightly the outer lane of measured bearing 7, for the convenience manual rotation measured axle 4, install handle 3 at the left end of measured axle 4, at the right-hand member installation transition axle 9 of measured axle 4, the rotary motion of being measured axle 4 is transmitted right.
A grating bearing seat 13 is fixed at the right end of a base 2, a pair of precise grating bearings 12 are arranged in inner holes of the grating bearing seat 13, grating shafts 11 are inserted into the inner holes of the grating bearings 12, the grating shafts 11 are axially locked by grating shaft nuts 18, rings of the grating bearings 12 are fixed on the grating shafts 11, then grating shaft bearing covers 19 are fixed with the grating bearing seat 13, outer rings of the grating bearings 12 are pressed tightly, and the grating bearings 12 are prevented from axially moving.
A grating seat 17 is fixed at the shaft end of the grating shaft 11, a circular grating 16 is fixed on the excircle of the grating seat 17, a dial indicator is used for continuously calibrating the radial runout of the grating seat 17 to be within +/-0.001 mm in the installation process, the radial runout and the end runout of the circular grating 16 are calibrated on the basis, and the runout quantity of the circular grating 16 is adjusted to be minimum according to the use requirement.
The reading head seat 14 and the reading head 15 are installed on the end face of the grating bearing seat 13, the height of the reading head seat 14 is firstly processed in place according to requirements in the installation process, then the reading head 15 and the reading head seat 14 are fixed, and the position of the reading head seat 14 is continuously adjusted in the radial direction and the tangential direction of the circular grating 16, so that the relative position of the reading head 15 and the circular grating 16 is optimal, and meanwhile, the output signal of the reading head 15 is also optimal.
An elastic shaft 10 is arranged between the transition shaft 9 and the grating shaft 11, two independent shaft systems are connected, and the axial variation of the measured shaft 4 can be filtered while the angle information of the measured shaft 4 is transmitted by means of the characteristics of the elastic shaft 10.
Because the condition limits, 4 axial variation test states can only be discretely simulated, in the actual use process, the axial variation is continuous and is not 4 independent states, and even if the axial variation is continuous, the circular grating assembly provided with the elastic shaft and the independent shaft system can filter the axial variation within +/-0.2 mm, so that the stable output of the circular grating signal is completed.
The grating bearing 12 of the present invention is a standard bearing, and is also suitable for replacing the standard bearing with a dense ball bearing.
The utility model provides a goniometric sensing device is the circular grating, and circle response synchronizer also is applicable to this kind of application.
The utility model simulates the axial deformation of the measured shaft 4 in the actual working condition by adjusting the thickness of each group of gaskets 1, so that the deformation is transmitted along the axial direction, adds a set of independent precise shafting for the circular grating 16 in order to stabilize the output precision of the circular grating 16, and installs the circular grating 16 on the grating shaft 11 through the grating seat 17; in addition, the deformation transmitted along the axial direction of the measured shaft 4 is isolated by the elastic shaft 10, the grating shaft 11 only receives the angle information from the measured shaft 4, and the output precision of the grating is stabilized by the grating shaft system precision.
Claims (3)
1. A circular grating compensation device comprises a detected bearing seat (6) arranged in a base (2), and is characterized in that a detected shaft (4) is arranged in the detected bearing seat (6), a detected bearing (7) is fixedly arranged between the detected bearing seat (6) and the detected shaft (4) through a detected shaft bearing cover (5) and a detected shaft nut (8), one end of the detected shaft (4) is connected with a handle (3), the other end of the detected shaft (4) is connected with a transition shaft (9), the transition shaft (9) is connected with one end of a grating shaft (11) through an elastic shaft (10), the grating shaft (11) is sleeved with a grating bearing seat (13) fixed on the base (2), a grating bearing (12) is fixedly arranged between the grating shaft (11) and the grating bearing seat (13) through a grating shaft bearing cover (19) and a grating shaft nut (18), and the other end of the grating shaft (11) is connected with a grating seat (17), a circular grating (16) is sleeved on the grating seat (17), and a reading head seat (14) and a reading head (15) which are arranged on the end surface of the grating bearing seat (13) are arranged outside the circular grating (16); 6 gaskets (1) are uniformly distributed between the base (2) and the bearing seat (6) to be measured.
2. The circular grating compensation device as claimed in claim 1, wherein the elastic shaft (10) comprises a grating shaft connection end (101), the grating shaft connection end (101) is symmetrically connected with a groove structure (102) at two sides, and the groove structure (102) is connected with a transition shaft connection lug (103); the elastic shaft (10) is a coupling which is deformable in the axial direction and can transmit the rotation angle of the measured shaft in the circumferential tangential direction.
3. The circular grating compensator according to claim 1, wherein the 6 shims (1) are 6 equal-height shims installed between the measured bearing seat (6) and the base (2) to simulate the variation of the axial extension or contraction of the measured shaft.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020787225.7U CN212158464U (en) | 2020-05-13 | 2020-05-13 | Circular grating compensation device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020787225.7U CN212158464U (en) | 2020-05-13 | 2020-05-13 | Circular grating compensation device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212158464U true CN212158464U (en) | 2020-12-15 |
Family
ID=73710221
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202020787225.7U Active CN212158464U (en) | 2020-05-13 | 2020-05-13 | Circular grating compensation device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN212158464U (en) |
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2020
- 2020-05-13 CN CN202020787225.7U patent/CN212158464U/en active Active
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