Large hollow time grating integrated angle sensor

Abstract

The utility model discloses a large hollow time grating integrated angle sensor, and relates to the technical field of precision test and application. Comprising a time grating stator, a time grating rotor, a stator seat, a rotor seat, a baffle plate, an L-shaped retainer, a precision steel ball and a mounting seat, the mounting seat is fixedly connected with the stator seat through a pin assembly; the time grating stator is fastened on the mounting seam allowance of the stator seat through a screw; the time grating rotor is installed in a spigot of the rotor seat through a screw, a dense ball bearing is designed on the outer ring of the rotor seat, the dense ball bearing is composed of an L-shaped retainer and a precise steel ball, and the rotor seat is connected with the stator seat through the dense ball bearing; according to the utility model, the automatic compensation of shafting jumping can be realized, the time grating is ensured to be in the optimal working state in one step, and compared with the traditional time grating mounting mode, the time grating mounting structure has the characteristics of better performance and easiness in realization.

Description

Technical Field

[0001] The utility model relates to the technical field of precision testing and application, in particular to a large hollow time-grating integrated angle sensor. Background Art

[0002] An angle sensor is a device used to measure and output angular changes. It captures and converts angle information through internal mechanisms and is commonly used in automation systems to monitor and control the rotational position of objects. Common angle sensors include time gratings, circular gratings, synchronizers, and resolvers. Time gratings, as high-precision encoders, have found widespread application in precision instruments, precise positioning, and high-precision machining.

[0003] Time-grating angle encoder systems typically employ a split-assembly, non-contact, and large-hollow design. In actual use, the stator and rotor are separate components, requiring the user to install the time-grating stator and rotor themselves. Currently, the most common installation method involves positioning the stator and rotor with a stopper and securing them with screws. During installation, the time-grating rotor is connected to the spindle. The radial and axial runout of the time-grating rotor must be adjusted. Once the runout error is adjusted to meet the required specifications, the gap between the time-grating stator and rotor is adjusted. Once the installation requirements are met, the time-grating stator is connected to the user's base, completing the mechanical assembly of the angle measurement system.

[0004] Because the time barrier is a split structure, its position at the time of installation cannot be guaranteed during use. Due to the objective existence of manufacturing and installation errors, the actual output accuracy of the time barrier deviates from the system accuracy. The most important thing when installing a time barrier is to ensure the clearance between the stator and rotor. If the clearance is too large or too small, the time barrier may lose its accuracy at best, or even fail to operate at worst. Utility Model Content

[0005] The purpose of the present utility model is to provide a time grid component for an angle measurement system with automatic compensation for main shaft runout error, so as to solve the problems in the above technical background. The time grid stator and rotor are integrated by using a ball bearing, thereby realizing automatic compensation for shaft runout, further ensuring that the time grid is in the best working state. Compared with the traditional time grid installation method, the utility model has the characteristics of better performance, easy implementation and high reliability.

[0006] The technical solution adopted to achieve the above-mentioned purpose is a large hollow time-grid integrated angle sensor, including a time-grid stator, a time-grid rotor, a stator seat, a rotor seat, a baffle, an L-shaped retaining frame, precision steel balls, and a mounting seat; the mounting seat is installed on the equipment base or frame, and the mounting seat is fixedly connected to the stator seat through a pin assembly; the time-grid stator is fastened to the mounting stop of the stator seat by screws; the time-grid rotor is installed in the stop of the rotor seat by screws, and the outer ring of the rotor seat is designed with a dense ball bearing, which is composed of an L-shaped retaining frame and precision steel balls, and the rotor seat and the stator seat are connected through the dense ball bearing.

[0007] Preferably, the L-shaped retainer is an integrated design, and three groups of holes are arranged in an array on the circumference of the L-shaped retainer for installing precision steel balls. The L-shaped retainer and the precision steel balls are integrally inserted into the bottom stop of the rotor seat, so that the precision steel balls are in point contact with the stop end face of the rotor seat, and the stop cylindrical surface of the rotor seat is in point contact with the radial steel ball, and the movement trajectory of the steel ball is limited by the L-shaped retainer and the baffle.

[0008] Preferably, baffles are fastened in the rotor seat and the L-shaped retainer groove by screws to ensure the consistency of the movement of the rotating shaft system.

[0009] Preferably, the pin assembly includes a mounting screw, a spring and a positioning pin. A precision pin hole is provided on the stator seat. The positioning pin is pressed into the precision pin hole of the stator seat by the mounting screw and the spring to fix the mounting seat to the stator seat; the end runout of the stator seat is calibrated with a micrometer, and the spring is compressed by the mounting screw to achieve axial fixation of the time grid device. At the same time, when there is axial runout, the axial stability of the time grid stator and rotor is guaranteed due to the compressibility of the spring, thereby achieving automatic compensation of the spindle shaft runout error.

[0010] Preferably, the positioning pin is a T-shaped cylindrical pin with a round head. The round head ensures ease of installation, and the T-shaped pin ensures that the positioning pin cannot fall off.

[0011] During installation, the angle measurement system can be installed by simply fastening the rotor seat to the end of the shaft to be measured with screws, and fastening the mounting seat to the base of the equipment with screws.

[0012] The beneficial technical effects of the present utility model are:

[0013] (1) The design complies with modular design specifications, is easy to install and use, can be quickly disassembled and assembled, and is also conducive to later after-sales maintenance.

[0014] (2) The use of a self-made dense ball shaft system can maximize the hollow size, and at the same time, the average effect of multiple precision steel balls can achieve the accuracy of P2 grade bearings.

[0015] (3) Since large hollow sizes can be achieved, the range of optional angle sensor sizes is large, and the application range of integrated angle sensors is very wide.

[0016] (4) The utility model has a simple structure, and its parts are easy to process and install. It can be designed with different installation interfaces according to different equipment sizes and installation conditions. It is suitable for most precision inertial navigation test equipment and simulation test equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a cross-sectional view of the present utility model.

[0018] Figure 2 This is a three-dimensional schematic diagram of the utility model from the first angle.

[0019] Figure 3 This is a three-dimensional schematic diagram from a second angle of the present invention.

[0020] Figure 4 It is a three-dimensional schematic diagram of the stator seat of the utility model.

[0021] Figure 5 It is a three-dimensional schematic diagram of the rotor seat of the present utility model.

[0022] Figure 6 It is a three-dimensional schematic diagram of the mounting base of the utility model.

[0023] Figure 7 It is a three-dimensional schematic diagram of the L-shaped retainer of the utility model.

[0024] Shown in the figure: 1. Time grid stator, 2. Time grid rotor, 3. Stator seat, 4. Rotor seat, 5. Baffle, 6. L-shaped retaining rack, 7. Precision steel ball, 8. Mounting seat, 9. Mounting screw, 10. Spring, 11. Locating pin. DETAILED DESCRIPTION

[0025] The following description of the embodiments will help the public better understand the present invention, but the specific embodiments given by the applicant cannot and should not be regarded as limitations on the technical solution of the present invention. Any changes to the definitions of components or technical features and / or formal rather than substantive changes to the overall structure should be regarded as the scope of protection defined by the technical solution of the present invention.

[0026] The following is a specific implementation method, combined with Figures 1 to 7 The utility model is further described as follows: A large hollow time grid integrated angle sensor includes a time grid stator 1, a time grid rotor 2, a stator seat 3, a rotor seat 4, a baffle 5, an L-shaped retainer 6, a precision steel ball 7, and a mounting seat 8; the mounting seat 8 is installed on the base or frame of the equipment, and the mounting seat 8 is fixedly connected to the stator seat 3 through a pin assembly; the time grid stator 1 is fastened to the mounting stop of the stator seat 3 by screws; the time grid rotor 2 is installed in the stop of the rotor seat 4 by screws, and the outer ring of the rotor seat 4 is designed with a dense ball bearing, which is composed of an L-shaped retainer 6 and a precision steel ball 7, and the rotor seat 4 and the stator seat 3 are connected through the dense ball bearing.

[0027] The L-shaped retainer 6 is an integrated design. Three groups of holes are arranged in an array on the circumference of the L-shaped retainer 6 for installing precision steel balls 7. The L-shaped retainer 6 and the installed precision steel balls 7 are integrally inserted into the bottom stop of the rotor seat 4, so that the precision steel balls 7 are in point contact with the stop end face of the rotor seat 4, and the stop cylindrical surface of the rotor seat 4 is in point contact with the radial steel balls. The movement trajectory of the steel balls is restricted by the L-shaped retainer and the baffle. A baffle 5 is fastened with screws in the groove of the rotor seat 4 and the L-shaped retainer 6 to ensure the consistency of the movement of the rotating shaft system.

[0028] The pin assembly includes a mounting screw 9, a spring 10, and a locating pin 11. The stator base 3 is provided with a precision pin hole. The locating pin 11 is pressed into the precision pin hole of the stator base 3 using the mounting screw 9 and spring 10 to secure the mounting base 8 to the stator base 3. The stator base's end runout is calibrated with a dial indicator, and the spring is compressed using the mounting screw to achieve axial fixation of the time-grid device. Furthermore, when axial runout occurs, the compressibility of the spring ensures axial stability of the time-grid stator and rotor, achieving automatic compensation for spindle runout errors. The locating pin 11 is a T-shaped cylindrical pin with a round head. The round head ensures easy installation, and the T-shaped pin prevents the locating pin from falling out.

[0029] Specific usage process: First install the dense ball bearing, that is, fill the three groups of holes on the L-shaped retainer 6 with precision steel balls 7, and then insert it into the bottom stop of the rotor seat 4 as a whole, so that the precision steel balls 7 are in point contact with the stop end face of the rotor seat 4, and the stop cylindrical surface of the rotor seat 4 is in point contact with the radial steel balls, and finally use screws to fix the baffle 5 in the sink groove of the rotor seat 4 and the L-shaped retainer 6.

[0030] Fix the time grid rotor 2 to the upper mounting surface of the rotor seat 4 with screws. Before tightening the screws, use a dial indicator to repeatedly calibrate the eccentricity of the time grid rotor 2 to ±0.005mm; then insert the stator seat 3 from top to bottom into the outer side of the radial steel ball, and make the lower end surface of the stator seat 3 point contact with the steel ball, and the cylindrical surface of the stator seat 3 point contact with the radial steel ball. Fix the time grid stator 1 to the upper mounting surface of the stator seat 3 with screws. Before tightening the screws, use a dial indicator to repeatedly calibrate the eccentricity of the time grid stator to ±0.005mm.

[0031] The assembled parts are installed on the end of the measured shaft through the rotor base 4. The mounting base 8 is fastened to the equipment base or frame with screws. The positioning pin 11 in the mounting base 8 is installed into the precision pin hole on the stator base 3. The end runout of the stator base is calibrated with a dial indicator. The spring 10 is compressed by the mounting screw 9 to achieve axial fixation of the time grid device. This ensures that the time grid output accuracy is optimal. The runout of the time grid integrated angle sensor is only affected by the runout of the ball bearing, and the sensor accuracy is no longer affected by the runout of the measured shaft. While transmitting the angle information of the measured shaft, the rotor base 4 can automatically compensate for the axial change of the measured shaft.

[0032] The angle measuring sensor device installed in the present invention is a time grating, which is also suitable for circular induction synchronizer and circular grating axial compensation; of course, the present invention can also have many other embodiments. Without departing from the spirit and essence of the present invention, technicians familiar with the field can make various corresponding changes and deformations based on the present invention, but these corresponding changes and deformations should all fall within the scope of protection of the claims attached to the present invention.

Claims

1. A large hollow time-grating integrated angle sensor, characterized by: The invention comprises a time grid stator (1), a time grid rotor (2), a stator seat (3), a rotor seat (4), a baffle (5), an L-shaped retainer (6), a precision steel ball (7), and a mounting seat (8); the mounting seat (8) is mounted on a base or a frame of the equipment, and the mounting seat (8) is fixedly connected to the stator seat (3) through a pin assembly; the time grid stator (1) is fastened to the mounting stop of the stator seat (3) through screws; the time grid rotor (2) is mounted in the stop of the rotor seat (4) through screws, and the outer ring of the rotor seat (4) is designed with a dense ball bearing, which is composed of an L-shaped retainer (6) and a precision steel ball (7), and the rotor seat (4) and the stator seat (3) are connected through the dense ball bearing.

2. The large hollow time-grating integrated angle sensor according to claim 1, characterized in that: The L-shaped retainer (6) is of an integrated design. Three groups of holes are arranged in an array on the circumference of the L-shaped retainer (6) for mounting precision steel balls (7). The L-shaped retainer (6) and the mounted precision steel balls (7) are integrally inserted into the bottom stop of the rotor seat (4), so that the precision steel balls (7) are in point contact with the stop end face of the rotor seat (4), and the stop cylindrical surface of the rotor seat (4) is in point contact with the radial steel balls.

3. The large hollow time-grating integrated angle sensor according to claim 2, characterized in that: A baffle (5) is fastened in the groove of the rotor seat (4) and the L-shaped retainer (6) by screws, so as to ensure the consistency of the movement of the rotating shaft system.

4. The large hollow time-grating integrated angle sensor according to claim 1, characterized in that: The pin assembly includes a mounting screw (9), a spring (10) and a positioning pin (11). A precision pin hole is provided on the stator seat (3). The positioning pin (11) is pressed into the precision pin hole of the stator seat (3) by the mounting screw (9) and the spring (10) to fix the mounting seat (8) to the stator seat (3).

5. The large hollow time-grating integrated angle sensor according to claim 4, characterized in that: The positioning pin (11) is a T-shaped cylindrical pin with a round head. The round head ensures ease of installation, and the T-shaped pin ensures that the positioning pin cannot fall off.

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