High-precision split type rotary encoder test tool

Abstract

A high-precision split type rotary encoder test tool, including motor, shaft, fixed plate and bottom plate, the output shaft of the motor is coaxial with the shaft, the shaft passes through the fixed plate, the fixed plate and motor are connected on the bottom plate, the surface of the fixed plate opposite to the motor is provided with positioning convex and bolt hole, the stator has positioning hole and fixing hole, and the positioning convex corresponds to the positioning hole, the bolt hole corresponds to the fixing hole, the stator is positioned by positioning convex and fixed by bolt; the end of the shaft away from the motor is fixed with magnet, the stator is provided with chip, the magnet rotation generates magnetic field to induct chip, the utility model can realize integrated test of split type rotary encoder, guarantees the relative position distance between split type rotary encoder rotor and stator when testing, guarantees test precision and accuracy, avoids the time waste of repeated disassembly and assembly, saves labor.

Description

Technical Field

[0001] This utility model relates to the field of encoder testing fixtures, and in particular to a high-precision split-type rotary encoder testing fixture. Background Technology

[0002] Split-type rotary encoders consist of a stator and a rotor. During testing, the stator must be fixed while the center point of the rotor is precisely aligned with the center point of the stator during rotational motion. This allows for the acquisition of long-term, accurate data. High-precision fixtures need to be designed to ensure that the relative positions remain unchanged during long-term testing and when switching test scenarios, so as to present true product accuracy and performance data.

[0003] The current testing fixtures often experience changes in testing accuracy due to the relative positional shift of the stator and rotor after disassembly, reassembly, and relocation to switch testing scenarios, making it difficult to guarantee the accuracy of test data. Summary of the Invention

[0004] The technical problem to be solved by this utility model is to overcome the defects of the existing technology, which often leads to changes in test accuracy due to the relative position offset of the stator and rotor after disassembly and relocation of test scenarios, making it difficult to guarantee the accuracy of test data. This invention provides a high-precision split-type rotary encoder test fixture.

[0005] The technical solution adopted by this utility model to solve its technical problem is a high-precision split-type rotary encoder testing fixture, including a motor, a rotating shaft, a fixed plate, and a base plate. The output shaft of the motor rotates coaxially with the rotating shaft. The rotating shaft passes through the fixed plate. The fixed plate and the motor are connected to the base plate. The fixed plate has positioning protrusions and bolt holes on its surface opposite to the motor. The stator has positioning holes and fixing holes, and the positioning protrusions correspond to the positioning holes. The bolt holes correspond to the fixing holes. The stator is positioned by the positioning protrusions and then fixed by bolts. A magnet is fixed to the end of the rotating shaft away from the motor. A chip is provided on the stator. The rotation of the magnet generates a magnetic field to sense the chip.

[0006] Furthermore, the output shaft and the rotating shaft of the motor rotate through a coupling.

[0007] Furthermore, it also includes a mounting plate, wherein the mounting plate and the fixing plate are arranged parallel to each other and are both vertically mounted on the base plate, and the motor is fixed on the mounting plate.

[0008] Furthermore, the fixed plate has a through hole, and a bearing is fixed inside the through hole. The rotating shaft passes through the bearing to achieve rotation on the fixed plate.

[0009] Furthermore, the fixing plate consists of a fixing part and a mounting part. The mounting part is an annular protrusion with a notch, and the positioning protrusion and bolt hole are provided on the mounting part. The rotating shaft passes through the fixing part and is located at the center of the mounting part.

[0010] Furthermore, the positioning protrusions and bolt holes are provided in multiples and are evenly distributed around the center of the mounting part. The positioning holes and fixing holes on the stator are provided in multiples and are evenly distributed around the center. The positions and numbers of the positioning protrusions and the positioning holes correspond one-to-one, and the positions and numbers of the bolt holes and the fixing holes correspond one-to-one.

[0011] This utility model has the following beneficial technical effects:

[0012] This invention enables integrated testing of split rotary encoders, ensuring that relocation during testing does not affect the relative position and distance between the rotor and stator of the split rotary encoder, thus guaranteeing testing accuracy and precision, avoiding the waste of time caused by repeated disassembly and assembly, and saving labor. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the stator of an embodiment of a high-precision split-type rotary encoder testing fixture according to this utility model;

[0014] Figure 2 This is a schematic diagram of the overall structure of an embodiment of a high-precision split-type rotary encoder testing fixture of this utility model;

[0015] Figure 3 This is a schematic diagram of the overall structure of an embodiment of a high-precision split-type rotary encoder testing fixture according to this utility model.

[0016] Explanation of reference numerals in the attached figures:

[0017] 1. Motor; 2. Mounting plate; 3. Base plate; 4. Coupling; 5. Shaft; 6. Bearing; 7. Magnet; 8. Fixing plate; 81. Fixing part; 82. Mounting part; 821. Positioning protrusion; 822. Bolt hole; 9. Stator; 91. Positioning hole; 92. Fixing hole. Detailed Implementation

[0018] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments.

[0019] Reference Figure 1 and Figure 2This embodiment includes a motor 1, a mounting plate 2, a rotating shaft 5, a fixing plate 8, and a base plate 3. The product to be tested is a stator 9. The stator 9 has a circuit board and a chip at its center, and its surface has positioning holes 91 and fixing holes. There are four positioning holes 91 and four fixing holes, which are evenly distributed in a cylindrical shape around the center. The positioning holes 91 are closer to the center on the stator 9, while the fixing holes are farther away from the center on the stator 9. The motor 1 is equivalent to a rotor.

[0020] Reference Figure 3 Mounting plate 2 and fixing plate 8 are arranged parallel to each other and are both vertically mounted on base plate 3, with a certain distance between them. Both mounting plate 2 and fixing plate 8 have through holes, and the axes of the two through holes are aligned with each other. Mounting plate 2 is used to fix motor 1, and the output shaft of motor 1 passes through the through hole. Fixing plate 8 is used to mount rotating shaft 5, and bearing 6 is fixed in the through hole on fixing plate 8. Rotating shaft 5 is mounted and passes through bearing 6. The output shaft of motor 1 and rotating shaft 5 transmit power through coupling 4.

[0021] Reference Figure 3 The fixing plate 8 consists of a fixing part 81 and a mounting part 82. The fixing part 81 is a vertical plate, and the mounting part 82 is a circular ring block with a notch. The notch is designed to avoid components on the stator 9. The fixing part 81 and the mounting part 82 are integrally formed. The surface of the mounting part 82 has positioning protrusions 821 and bolt holes 822. There are four positioning protrusions 821 and four bolt holes 822, which are evenly distributed in a cylindrical shape around the center of the mounting part 82. The radius of the circle formed by the four bolt holes 822 is equal to the radius of the circle formed by the four fixing holes. That is, the position and number of the positioning protrusions 821 correspond one-to-one with the positioning holes 91, and the position and number of the bolt holes 822 correspond one-to-one with the fixing holes.

[0022] Reference Figure 3 In addition, the rotating shaft 5 has a groove at the end away from the motor 1, and a magnet 7 is engaged in the groove. The rotation of the magnet 7 generates a magnetic field, which is used to sense the chip in the stator 9 to transmit data signals. After the stator 9 is positioned and installed, the rotating shaft 5 and the magnet 7 are exactly aligned with the central part of the stator 9, that is, directly facing the circuit board and the chip.

[0023] The implementation principle of a high-precision split-type rotary encoder testing fixture according to this utility model embodiment is as follows:

[0024] After the tooling is assembled, the stator 9 of the rotary encoder under test is placed in the fixing plate 8 for positioning. Then, the four screws that fix the product are tightened. Then, the power and signal lines on the rotary encoder under test and the motor 1 are connected to the external test and monitoring equipment to start the test. When moving the test environment, the assembled tooling can be moved as a whole, which avoids the relative positional deviation between the rotor and stator 9 caused by disassembly and assembly, which affects the accuracy of the test before and after, ensures the accuracy of the test data, and saves time.

[0025] The above are all preferred embodiments of this utility model, and are not intended to limit the scope of protection of this utility model. Identical components are represented by the same reference numerals. It should be noted that the terms "front," "rear," "left," "right," "up," and "down" used in the following description refer to directions in the accompanying drawings, while the terms "inner" and "outer" refer to directions toward or away from the geometric center of a specific component. Therefore, all equivalent changes made to the structure, shape, and principle of this utility model should be included within the scope of protection of this utility model.

Claims

1. A high-precision split-type rotary encoder testing fixture, characterized in that, The system includes a motor (1), a rotating shaft (5), a fixing plate (8), and a base plate (3). The output shaft of the motor (1) rotates coaxially with the rotating shaft (5). The rotating shaft (5) passes through the fixing plate (8). The fixing plate (8) and the motor (1) are connected to the base plate (3). The fixing plate (8) has a positioning protrusion (821) and a bolt hole (822) on its surface opposite to the motor (1). The stator (9) has a positioning hole (91) and a fixing hole. The positioning protrusion (821) corresponds to the positioning hole (91), and the bolt hole (822) corresponds to the fixing hole. The stator (9) is positioned by the positioning protrusion (821) and then fixed by bolts. A magnet (7) is fixed at the end of the rotating shaft (5) away from the motor (1). A chip is provided on the stator (9). The magnet (7) rotates to generate a magnetic field to sense the chip.

2. The high-precision split-type rotary encoder testing fixture according to claim 1, characterized in that, The output shaft of the motor (1) and the rotating shaft (5) rotate through a coupling (4).

3. The high-precision split-type rotary encoder testing fixture according to claim 1, characterized in that, It also includes a mounting plate (2), which and the fixing plate (8) are arranged parallel to each other and are both vertically mounted on the base plate (3), and the motor (1) is fixed on the mounting plate (2).

4. The high-precision split-type rotary encoder testing fixture according to claim 1, characterized in that, The fixed plate (8) has a through hole, and a bearing (6) is fixed in the through hole. The rotating shaft (5) passes through the bearing (6) to achieve rotation on the fixed plate (8).

5. The high-precision split-type rotary encoder testing fixture according to claim 1, characterized in that, The fixing plate (8) is composed of a fixing part (81) and a mounting part (82). The mounting part (82) is an annular protrusion with a notch, and the positioning protrusion (821) and bolt hole (822) are provided on the mounting part (82). The rotating shaft (5) passes through the fixing part (81) and is located at the center of the mounting part (82).

6. The high-precision split-type rotary encoder testing fixture according to claim 5, characterized in that, The positioning protrusions (821) and bolt holes (822) are provided in multiples and are evenly distributed around the center of the mounting part (82). The positioning holes (91) and fixing holes on the stator (9) are provided in multiples and are evenly distributed around the center. The position and number of the positioning protrusions (821) and the positioning holes (91) correspond one-to-one, and the position and number of the bolt holes (822) and the fixing holes correspond one-to-one.

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