An angle encoder detection device

Abstract

The present application relates to a kind of angle encoder detection device, belongs to the technical field of angle encoder quality detection, and detection device includes DC torque motor, machine base, first deep groove ball bearing, motor shaft, angle measuring shaft, second deep groove ball bearing;First deep groove ball bearing and second deep groove ball bearing of the front and rear sides of machine base are respectively installed in front axle hole and rear axle hole;The stator of DC torque motor is installed in one side of machine base, the rotor of DC torque motor is sleeved on motor shaft, and motor shaft is coaxially connected with the angle measuring shaft passing through first deep groove ball bearing and second deep groove ball bearing;On the other side of machine base, angle encoder is sleeved on angle measuring shaft;DC torque motor drives the rotor of angle encoder relative to stator rotation by motor shaft and angle measuring shaft, and computer real-time display angle encoder output angle value.The present application can detect whether one or more angle encoder appears abnormal in continuous reading, provide support for batch detection, use angle encoder.

Description

Technical Field

[0001] This invention relates to the technical field of angle encoder quality inspection, specifically to an angle encoder inspection device, mainly used to inspect the quality and reliability of various angle encoders. Background Technology

[0002] Angle encoders are sensors that acquire changes in angular displacement. They have a wide range of applications and play a vital role in CNC machine tools, rotary tables, photoelectric pointers, navigation systems, and other fields. Fixed to high-precision shaft systems, angle encoders serve as the benchmark for the functions and performance indicators of many devices; therefore, their operating status and reliability are extremely important. Manufacturers purchasing angle encoders not only need relevant qualification certificates from the supplier but also need to screen their quality and reliability upon arrival at their factory. However, the testing equipment used is either too simple to achieve the testing purpose, or it is too expensive, increasing the cost of the angle encoder. Furthermore, testing only one angle encoder at a time is inefficient. Summary of the Invention

[0003] To address the shortcomings of the existing technology, the present invention provides an angle encoder detection device, which uses a high-precision rotation device to detect whether one or more angle encoders exhibit abnormalities during continuous reading, thus providing support for batch testing and the use of angle encoders.

[0004] To achieve the above objectives, the present invention provides the following technical solution:

[0005] An angle encoder detection device, the detection device comprising a DC torque motor, a base, a first deep groove ball bearing, a motor shaft, an angle measuring shaft, and a second deep groove ball bearing;

[0006] The machine base has a front axle hole and a rear axle hole on its front and rear sides, respectively, and the first deep groove ball bearing and the second deep groove ball bearing are respectively installed in the front axle hole and the rear axle hole;

[0007] The stator of the DC torque motor is mounted on one side of the frame, and the rotor of the DC torque motor is sleeved on the motor shaft. The motor shaft passes through the first deep groove ball bearing and is coaxially connected to the measuring shaft passing through the second deep groove ball bearing.

[0008] On the other side of the base, an angle encoder is fitted onto the angle measuring shaft. The rotor of the angle encoder is fixed to the angle measuring shaft by an angle measuring pressure ring, and the stator of the angle encoder is fixed to the base. The power supply cable and signal transmission cable of the angle encoder are led out from the detection device and connected to the computer. The DC torque motor drives the rotor of the angle encoder to rotate relative to the stator through the motor shaft and the angle measuring shaft. The computer displays the output angle value of the angle encoder in real time.

[0009] Furthermore, the detection device also includes a protractor, a protractor pressure ring, and a protractor support shaft; the protractor support shaft is coaxially mounted on the rear end of the protractor shaft; the protractor is coaxially sleeved on the outside of the protractor support shaft and fixed on the base; the stator of the second angle encoder is fixed on the protractor; the protractor pressure ring is fixed on the protractor support shaft and presses against the rotor of the angle encoder; when the protractor support shaft rotates synchronously with the protractor shaft, it drives the rotor of the second angle encoder to rotate.

[0010] Furthermore, the second angle measuring seat is fixed to the rear side of the first angle measuring seat by angle measuring seat fastening screws; the second angle measuring support shaft is fixed to the rear side of the first angle measuring support shaft by angle measuring pressure ring fastening screws; the stator of the third angle encoder is fixed on the second angle measuring seat; the second angle measuring pressure ring is fixed on the second angle measuring support shaft, pressing the rotor of the third angle encoder.

[0011] Furthermore, the rear end face of the angle measuring shaft is provided with an annular boss; the angle measuring support shaft is a flange structure with a boss on its front end face; the angle measuring support shaft is coaxially connected with the angle measuring shaft by inserting the boss into the inner side of the annular boss.

[0012] Furthermore, the angle measuring base is a flange structure with symmetrical angle measuring base outlet notches for leading out the power supply cable and signal transmission cable of the angle encoder.

[0013] Furthermore, the detection device also includes a measuring end bearing retainer ring; the measuring end bearing retainer ring is installed in the rear shaft hole of the machine base by bearing retainer ring fastening screws to fix the outer ring of the second deep groove ball bearing.

[0014] Furthermore, the detection device also includes a motor end bearing retaining ring and a motor end bearing threaded retaining ring; the motor end bearing retaining ring is fixed in the machine base by bearing retaining ring fastening screws, pressing the outer ring of the first deep groove ball bearing; the motor end bearing threaded retaining ring is sleeved on the motor shaft, fixing the inner ring of the first deep groove ball bearing.

[0015] Furthermore, the detection device also includes a motor threaded pressure ring; the motor threaded pressure ring is fitted on the motor shaft and threadedly connected to the motor shaft, pressing down on the rotor of the DC torque motor.

[0016] Furthermore, the angle measuring axis is coaxially connected to the motor shaft via a motor shaft fastening screw.

[0017] Furthermore, the base has symmetrical cable outlets on the side where the angle measuring shaft is mounted, for leading out the power supply cable and signal transmission cable of the first angle encoder.

[0018] The beneficial effects of this invention are:

[0019] This invention enables simultaneous online inspection of one or more angle encoders. It has a simple structure, low inspection cost, high inspection efficiency, and high inspection accuracy. It can be applied in multiple environments, including environments with vibration, shock, and high and low temperatures.

[0020] This invention establishes a shaft system by using deep groove ball bearings. One end of the shaft system is driven by a DC torque motor, and the other end is where the angle encoder to be tested is placed. After the DC torque motor and the angle encoder are powered on, the continuous change of the output angle value of one or more angle encoders can be observed and recorded simultaneously to confirm whether there are any abnormalities in their working status or reliability.

[0021] The use of deep groove ball bearings in this invention can ensure smoothness and rotational accuracy during detection. At the same time, it can also improve the grade requirements of deep groove ball bearings according to the installation accuracy requirements of the rotating shaft of the angle encoder, so as to meet the detection needs of angle encoders with different precision.

[0022] This invention, by adding an angle measuring support shaft to the end of the angle measuring shaft, can extend the length of the angle measuring shaft according to the number of angle encoders. With the cooperation of the angle measuring base, the number of angle encoders to be detected can be increased, which can greatly improve the detection efficiency. Attached Figure Description

[0023] Figure 1 This is a three-dimensional schematic diagram of the angle encoder detection device of the present invention;

[0024] Figure 2 This is a cross-sectional view of the shaft system of the angle encoder detection device of the present invention;

[0025] Figure 3 A schematic diagram showing the installation of a single angle encoder under test in the angle encoder detection device of the present invention;

[0026] Figure 4 This is a schematic diagram of the cable outlet notch on the base in this invention;

[0027] Figure 5 This is a schematic diagram of the angle measuring support shaft structure in this invention;

[0028] Figure 6 A schematic diagram showing the installation of two angle encoders to be tested in the angle encoder detection device of the present invention;

[0029] Figure 7 This is a schematic diagram of the angle measuring base structure in this invention;

[0030] Figure 8 This is a schematic diagram showing the installation of multiple angle encoders to be tested in the angle encoder detection device of the present invention.

[0031] Among them: 1-DC torque motor, 2-frame, 2.1-frame cable outlet notch, 3-motor end bearing retaining ring, 4-bearing retaining ring fastening screw, 5-angle encoder fastening screw, 6-angle encoder, 7-angle measuring seat fastening screw, 8-angle measuring seat, 8.1-angle measuring seat cable outlet notch, 9-motor threaded retaining ring, 10-first deep groove ball bearing, 11-motor end bearing threaded retaining ring, 12-motor shaft, 13-motor shaft fastening screw, 14-angle measuring shaft, 15-second deep groove ball bearing, 16-angle measuring end bearing retaining ring, 17-angle measuring retaining ring, 18-angle measuring support shaft, 19-angle measuring retaining ring fastening screw. Detailed Implementation

[0032] The specific embodiments of the present invention will be further described in detail below with reference to the accompanying drawings and examples. The following examples are for illustrative purposes only and are not intended to limit the scope of the invention.

[0033] The terms used in this application, such as top, bottom, left, right, inside, outside, front end, rear end, head, and tail, are based on the orientations or positional relationships shown in the accompanying drawings. Different drawings may result in different positional relationships, therefore they should not be construed as limiting the scope of protection.

[0034] In this invention, the terms "installation," "connection," "interlocking," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, an integral connection, a mechanical connection, an electrical connection, or a connection that allows communication between components. They can also refer to a direct connection or an indirect connection through an intermediate medium. Furthermore, they can refer to the internal connection of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of these terms in this invention based on the specific circumstances.

[0035] This embodiment describes an angle encoder detection device that can simultaneously achieve high-precision detection of multiple angle encoders.

[0036] like Figure 1 and Figure 2 As shown, the angle encoder detection device includes a DC torque motor 1, a base 2, a motor end bearing pressure ring 3, an angle measuring seat 8, a motor threaded pressure ring 9, a first deep groove ball bearing 10, a motor end bearing threaded pressure ring 11, a motor shaft 12, an angle measuring shaft 14, a second deep groove ball bearing 15, an angle measuring end bearing pressure ring 16, an angle measuring pressure ring 17, and an angle measuring support shaft 18.

[0037] The base 2 is a U-shaped structure consisting of a front mounting plate, a base plate, and a rear mounting plate. The base plate can be mounted on different testing platforms through multiple through holes. The front mounting plate and the rear mounting plate have flange structures in the middle. The center of the flange structure is provided with a coaxial front shaft hole and a rear shaft hole, respectively. Multiple mounting holes are provided around the front shaft hole and the rear shaft hole for mounting the DC torque motor 1 and the angle measuring shaft 14.

[0038] The front axle bore consists of an outer stepped bore and an inner stepped bore connected together. One end of the stator of the DC torque motor 1 is placed in the outer stepped bore, and the DC torque motor 1 is mounted on the outside of the front mounting plate by bolts. The rotor of the DC torque motor 1 is sleeved on the motor shaft 12, which extends from the front axle bore through the front mounting plate toward the rear mounting plate. The motor threaded retaining ring 9 is sleeved on the motor shaft 12 and threadedly connected to it, pressing the rotor so that the DC torque motor 1 drives the motor shaft 12 to rotate. The first deep groove ball bearing 10 is placed in the inner stepped bore of the front axle bore and sleeved on the motor shaft 12. The motor end bearing retaining ring 3 is fixed to the inside of the front mounting plate by bearing retaining ring fastening screws 4, pressing the outer ring of the first deep groove ball bearing 10. The motor end bearing threaded retaining ring 11 is sleeved on the motor shaft 12, fixing the inner ring of the first deep groove ball bearing 10.

[0039] One end of the angle measuring shaft 14 extends from the outside of the rear mounting plate through the rear shaft hole to the motor shaft 12. The angle measuring shaft 14 is coaxially connected to the motor shaft 12 via the motor shaft fastening screw 13. The side of the rear shaft hole facing outward has a stepped hole. The second deep groove ball bearing 15 is placed in the stepped hole, and the inner ring of the second deep groove ball bearing 15 is fitted onto the angle measuring shaft 14. The angle measuring end bearing retaining ring 16 is installed in the stepped hole of the rear mounting plate of the machine base 2 via the bearing retaining ring fastening screw 4, fixing the outer ring of the second deep groove ball bearing 15.

[0040] One or more angle encoders 6 to be tested are mounted on the angle measuring shaft 14, and the DC torque motor 1 drives the rotor of the angle encoder 6 to rotate through the motor shaft 12 and the angle measuring shaft 14.

[0041] The first encoder to be measured, 6, is mounted on the angle measuring shaft 14, which has an annular boss on its end face. For example... Figure 3 As shown, the angle measuring ring 17 is located on the rear side of the angle encoder 6 and outside the annular boss. The angle measuring ring 17 is fixed to the angle measuring shaft 14 by the angle measuring ring fastening screw 19 and presses against the rotor of the angle encoder 6. The stator of the angle encoder 6 is fixed to the outer mounting plate by the angle encoder fastening screw 5. Alternatively, the angle encoder 6 has a flange mounting plate and can be directly mounted on the outer mounting plate by bolts.

[0042] like Figure 4As shown, the outer mounting plate of the base 2 has symmetrically arranged base cable outlets 2.1. The power supply cable and signal transmission cable of the angle encoder 6 are led out from the base cable outlets 2.1 and connected to the computer via a USB cable and RS422 communication serial port. The display software of the angle encoder 6 is opened on the computer to display the rotation angle value of the angle encoder 6 in real time. By viewing the output angle record of the angle encoder 6, the reliability of the angle encoder 6 can be determined online.

[0043] Angle measuring support shaft 18 is coaxially mounted at the rear end of angle measuring shaft 14, forming an extension shaft of angle measuring shaft 14, which facilitates adjusting the length of angle measuring shaft 14 according to the number of angle encoders 6. In this embodiment, the number of angle measuring support shaft 18 is the same as the number of angle encoders 6.

[0044] like Figure 5 As shown, in this embodiment, the angle measuring support shaft 18 is a flange structure with a boss on its front end face. The boss is inserted into the inner side of the annular boss of the angle measuring shaft 14, quickly realizing the coaxial connection between the angle measuring support shaft 18 and the angle measuring shaft 14. The rear end face of the angle measuring support shaft 18 has two rows of multiple connecting holes arranged around it for connecting with the next angle encoder 6 and angle measuring seat 8.

[0045] The angle measuring bracket 8 is coaxially sleeved on the outside of the angle measuring support shaft 18 and fixed to the rear mounting plate by the angle measuring bracket fastening screws 7. Figure 6 As shown, the stator of the second angle encoder 6 to be tested is fixed to the angle measuring base 8 by the angle encoder fastening screw 5. The angle measuring pressure ring 17 is fixed to the angle measuring support shaft 18 by the angle measuring pressure ring fastening screw 19, pressing the rotor of the angle encoder 6. When the angle measuring support shaft 18 rotates with the angle measuring shaft 14, it drives the rotor of the second angle encoder 6 to rotate together, that is, to rotate synchronously with the rotor of the first angle encoder 6.

[0046] like Figure 7 As shown, the angle measuring base 8 is a flange structure with symmetrical angle measuring base outlet notches 8.1 on it, which are used to lead out the power supply cable and signal transmission cable of the corresponding angle encoder 6.

[0047] like Figure 8 As shown, the installation of the third and subsequent angle encoders 6 differs from that of the second angle encoder 6 in that the angle measuring support shaft 18 is fixed to the rear side of the previous angle measuring support shaft 18 by angle measuring pressure ring fastening screws 19, and the angle measuring seat 8 is fixed to the rear side of the previous angle measuring seat 8 by angle measuring seat fastening screws 7. The stator of the third angle encoder 6 is fixed on the second angle measuring seat 8; the third angle measuring pressure ring 17 is fixed on the second angle measuring support shaft 18, pressing the rotor of the third angle encoder 6. Following the fixing method of the third angle encoder 6, multiple angle encoders 6 can be fixed sequentially, realizing the function of simultaneous online detection of multiple encoders 6.

[0048] In this embodiment, after the angle encoder 6 to be tested is installed, the DC torque motor 1 and the angle encoder 6 are powered on. The DC torque motor 1 drives the rotor of the angle encoder 6 to rotate relative to the stator through the motor shaft 12 and the angle measuring shaft 14. The continuous change of the output angle value of the angle encoder 6 is observed and recorded in real time on the computer. The working status or reliability of the angle encoder 6 is confirmed based on the change of the angle value. Under normal circumstances, the output angle value of a normal angle encoder 6 changes continuously. If the output angle value changes abruptly, it is abnormal.

[0049] Although the principles of the present invention have been described in detail above with reference to preferred embodiments, those skilled in the art should understand that the above embodiments are merely illustrative explanations of the implementation of the present invention and are not intended to limit the scope of the present invention. The details in the embodiments do not constitute a limitation on the scope of the present invention. Any obvious changes, such as equivalent transformations or simple substitutions, based on the technical solutions of the present invention without departing from the spirit and scope of the present invention fall within the protection scope of the present invention.

Claims

1. An angle encoder detection device, characterized in that, The detection device includes a DC torque motor, a base, a protractor mount, a first deep groove ball bearing, a motor shaft, a protractor shaft, a second deep groove ball bearing, a protractor pressure ring, and a protractor support shaft; The machine base has a front axle hole and a rear axle hole on its front and rear sides, respectively, and the first deep groove ball bearing and the second deep groove ball bearing are respectively installed in the front axle hole and the rear axle hole; The stator of the DC torque motor is mounted on one side of the frame, and the rotor of the DC torque motor is sleeved on the motor shaft. The motor shaft passes through the first deep groove ball bearing and is coaxially connected to the measuring shaft passing through the second deep groove ball bearing. On the other side of the base, the first angle encoder is fitted onto the angle measuring shaft, the rotor of the first angle encoder is fixed to the angle measuring shaft by the first angle measuring pressure ring, and the stator of the first angle encoder is fixed to the base. The first angle measuring support shaft is coaxially mounted on the rear end of the angle measuring shaft; the first angle measuring seat is coaxially sleeved on the outside of the first angle measuring support shaft and fixed on the base; the stator of the second angle encoder is fixed on the first angle measuring seat; the second angle measuring pressure ring is fixed on the first angle measuring support shaft and presses against the rotor of the second angle encoder; when the first angle measuring support shaft rotates synchronously with the angle measuring shaft, it drives the rotor of the second angle encoder to rotate. The second angle measuring seat is fixed to the rear side of the first angle measuring seat by angle measuring seat fastening screws; the second angle measuring support shaft is fixed to the rear side of the first angle measuring support shaft by the third angle measuring pressure ring fastening screws; the stator of the third angle encoder is fixed on the second angle measuring seat; the third angle measuring pressure ring is fixed on the second angle measuring support shaft, pressing the rotor of the third angle encoder; The power supply cable and signal transmission cable of the angle encoder are led out from the detection device and connected to the computer; the DC torque motor drives the rotor of the angle encoder to rotate relative to the stator through the motor shaft and the angle measuring shaft, and the computer displays the output angle value of the angle encoder in real time.

2. The angle encoder detection device according to claim 1, characterized in that, The rear end face of the angle measuring shaft is provided with an annular boss; the angle measuring support shaft is a flange structure with a boss on its front end face; the angle measuring support shaft is coaxially connected with the angle measuring shaft by inserting the boss into the inner side of the annular boss.

3. The angle encoder detection device according to claim 1, characterized in that, The angle measuring base is a flange structure with symmetrical angle measuring base outlets for leading out the power supply cable and signal transmission cable of the angle encoder.

4. The angle encoder detection device according to claim 1, characterized in that, The detection device also includes a measuring end bearing ring; the measuring end bearing ring is installed in the rear shaft hole of the machine base by bearing ring fastening screws to fix the outer ring of the second deep groove ball bearing.

5. The angle encoder detection device according to claim 1, characterized in that, The detection device also includes a motor end bearing retaining ring and a motor end bearing threaded retaining ring; the motor end bearing retaining ring is fixed in the machine base by bearing retaining ring fastening screws, pressing the outer ring of the first deep groove ball bearing; the motor end bearing threaded retaining ring is sleeved on the motor shaft, fixing the inner ring of the first deep groove ball bearing.

6. The angle encoder detection device according to claim 1, characterized in that, The detection device also includes a motor threaded pressure ring; the motor threaded pressure ring is fitted on the motor shaft and threadedly connected to the motor shaft, pressing down on the rotor of the DC torque motor.

7. The angle encoder detection device according to claim 1, characterized in that, The angle measuring axis is coaxially connected to the motor shaft via motor shaft fastening screws.

8. The angle encoder detection device according to claim 1, characterized in that, The base has symmetrical cable outlets on one side where the angle measuring shaft is mounted, for leading out the power supply cable and signal transmission cable of the first angle encoder.

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