Eccentricity-adjustable angle encoder test tool clamp

Abstract

The utility model relates to an adjustable eccentricity angle encoder test tool clamp which comprises a cage frame, a motor, a rotor shaft, an end cover and a clamping ring. The top of the cage frame is open, first screw holes are formed in the top edge of the cage frame in the axial direction of the cage frame, and second screw holes are formed in the top of the side wall of the cage frame in the radial direction of the cage frame. The motor is installed in the cage frame, the rotor shaft is connected to the motor rotor, the encoder stator is connected to the end cover, the encoder rotor is connected to the clamping ring, and the rotor shaft penetrates through the end cover, the encoder stator and an inner ring of the encoder rotor and then is connected with the clamping ring. A first fixing hole is formed in the position, corresponding to the first screw hole, of the end cover, and an annular limiting ring is arranged on the bottom face of the end cover; the end cover is connected to the cage frame through the first screw hole, so that the stator and the rotor of the angle encoder are in a concentric state, or the end cover is connected to the cage frame through the second screw hole, so that the stator and the rotor of the angle encoder are in an eccentric state, and the eccentricity can be adjusted.

Description

Technical Field

[0001] The utility model relates to an angular encoder test fixture with adjustable eccentricity, belonging to the technical field of angular encoder testing. Background Art

[0002] Angle encoders are widely used sensors in measuring equipment to accurately measure the rotational angle of bearings or objects. Their operating principle is based on counting signal pulses. They can be categorized into resistive, Hall-effect, photosensitive, and capacitive types. They convert angular position into a digital signal and are commonly used in industrial automation, robotics, aerospace, and other fields.

[0003] Common non-contact angle encoder mounting methods include flange mounting, shoulder bolt mounting, and back cover mounting. While flange and shoulder bolt mounting methods are simple to assemble, they suffer from poor precision, with parallelism and concentricity failing to meet the requirements of high-precision angle encoders. Back cover mounting is more complex, inconvenient, and difficult to control for accuracy. Furthermore, none of these mounting methods can adjust the air gap or eccentricity. Utility Model Content

[0004] The purpose of the utility model is to solve the problem that the eccentricity state of the angle encoder test installation method in the prior art cannot be adjusted, and to provide a test fixture with a simple structure and adjustable eccentricity state.

[0005] In order to achieve the above-mentioned object, the technical solution proposed in the utility model is as follows: a test fixture for an angle encoder with adjustable eccentricity, wherein the angle encoder includes an encoder stator and an encoder rotor, and the test fixture includes a cage, a motor, a rotor shaft, an end cover and a clamping ring;

[0006] The cage has an opening at the top, a plurality of first screw holes for connecting the end covers and arranged along the axial direction of the cage are provided on the edge of the top of the cage, and a plurality of second screw holes for connecting the end covers and arranged along the radial direction of the cage are provided on the top of the side wall of the cage;

[0007] The motor is installed in the cage, a motor rotor is provided on the top of the motor, the rotor shaft is connected to the motor rotor, and a third screw hole for connecting a measuring meter is provided at the center of the top of the rotor shaft;

[0008] The encoder stator is connected to the end cover, and the encoder rotor is connected to the clamping ring. The end cover, encoder stator and encoder rotor are all ring-shaped. The rotor shaft passes through the inner ring of the end cover, encoder stator and encoder rotor and is connected to the clamping ring.

[0009] The end cover is provided with a first fixing hole at a position corresponding to the first screw hole, and an annular limiting ring is provided on the bottom surface of the end cover. The outer diameter of the limiting ring is smaller than the inner diameter of the top of the cage, and the limiting ring is embedded in the opening of the cage;

[0010] The end cover is connected to the cage frame by screws arranged in the first screw hole and the first fixing hole, or is connected to the cage frame by abutting against a limit ring by a top screw arranged in the second screw hole.

[0011] A further design of the above technical solution is as follows: the motor rotor is annular, and the top surface of the motor rotor protrudes from the top surface of the motor; a limiting groove is provided at the bottom of the rotor shaft, and the outer ring diameter of the motor rotor matches the inner diameter of the limiting groove.

[0012] The motor rotor is provided with a plurality of fourth screw holes, the rotor shaft is provided with second fixing holes at positions corresponding to the fourth screw holes, and the rotor shaft is fixed to the motor rotor by screws arranged in the fourth screw holes and the second fixing holes.

[0013] The encoder stator is provided with a plurality of third fixing holes, and the end cover is provided with fifth screw holes corresponding to the third fixing holes. The encoder stator is fixed to the end cover by screws arranged in the fifth screw holes and the third fixing holes.

[0014] The encoder stator is provided with a plurality of positioning holes, and the end cover is provided with positioning pins at positions corresponding to the positioning holes. The encoder stator is positioned on the end cover through the cooperation between the positioning holes and the positioning pins.

[0015] The encoder rotor is provided with a plurality of fourth fixing holes, the clamping ring is provided with sixth screw holes corresponding to the fourth fixing holes, and the encoder rotor is fixed to the clamping ring by screws arranged in the sixth screw holes and the fourth fixing holes.

[0016] The clamping ring is in the shape of a ring with a notch on one side. A locking screw is provided at the notch. The clamping ring is slidably connected to the rotor shaft and is fixed by the locking screw.

[0017] The end cover and the clamping ring are respectively provided with a plurality of groups of fifth screw holes and sixth screw holes, each group of fifth screw holes and sixth screw holes is distributed along the circumference and is used to connect encoder stators and encoder rotors of different sizes.

[0018] The end cover is provided with a wire outlet hole for the encoder stator wire outlet.

[0019] The side of the cage is provided with a square hole for the motor wire outlet.

[0020] The beneficial effects of the present invention are:

[0021] The angle encoder test fixture designed in the utility model can adapt to different requirements for the air gap distance between the stator and rotor of the angle encoder and different requirements for concentricity. The stator and rotor of the angle encoder are respectively fixed by the end cover and the clamping ring. The installation air gap of the stator and rotor of the angle encoder can be adjusted by adjusting the position of the clamping ring on the rotor shaft. The concentricity of the stator and rotor of different angle encoders can be adjusted by adjusting the concentricity of the installation end cover and the rotor shaft.

[0022] When the end cover is connected to the cage through the first screw hole, the end cover and the motor can maintain a high concentricity, so that the stator and rotor of the angle encoder are in a highly concentric state; when the end cover is connected to the cage through the second screw hole, the eccentricity of the end cover relative to the center of the motor can be adjusted by the screw, so that the stator and rotor of the angle encoder are in an eccentric state.

[0023] The installation hole positions of the end cover and the clamping ring of the utility model can be adjusted according to the angle encoder, and can adapt to angle encoders of different shapes and specifications.

[0024] The angle encoder test fixture designed in this utility model is easy to assemble. The various parts are fitted with clearances, eliminating the need for specialized installation methods. Screws and retaining grooves connect the components, making installation simple and convenient, without the need for specialized tools or techniques. Furthermore, the angle encoder test fixture designed in this utility model improves the installation accuracy of the angle encoder, enhancing its concentricity and parallelism. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 This is an exploded view of the test fixture of Example 1;

[0026] Figure 2 This is a front view of the test fixture of Example 1;

[0027] Figure 3 for Figure 2 Middle YY section view;

[0028] Figure 4 This is an exploded view of the test fixture of Example 2;

[0029] Figure 5 This is a front view of the test fixture of Example 2;

[0030] Figure 6 for Figure 5 Middle YY section view;

[0031] In the figure: 1-cage, 11-first screw hole, 12-second screw hole, 2-motor, 3-rotor shaft, 31-third screw hole, 4-end cover, 41-limiting ring, 5-encoder stator, 6-encoder rotor, 7-clamping ring. DETAILED DESCRIPTION

[0032] The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments. Example 1

[0033] like Figure 1 As shown, the installation object of this embodiment is a non-contact angle encoder with a diameter of 75 mm. The adjustable eccentricity angle encoder test fixture of this embodiment includes a cage 1, a motor 2, a rotor shaft 3, an end cover 4 and a clamping ring 7;

[0034] The cage 1 is cylindrical with an open top. The top edge of the cage 1 is provided with a plurality of first screw holes 11 for connecting the end covers and arranged along the axial direction of the cage. The top of the side wall of the cage 1 is provided with a plurality of second screw holes 12 for connecting the end covers and arranged along the radial direction of the cage.

[0035] Combine Figure 2 As shown, cage 1 has a mounting hole at the bottom, and motor 2 is mounted within cage 1 via screws set in the mounting hole. A motor rotor is located at the top of motor 2, and a retaining groove is provided at the bottom of rotor shaft 3. The top surface of the motor rotor protrudes above the top surface of the motor, and the outer ring diameter of the motor rotor matches the inner diameter of the retaining groove. The motor rotor is annular and has several fourth screw holes. Rotor shaft 3 has second fixing holes corresponding to the fourth screw holes. The rotor shaft 3 is positioned on the motor rotor via the retaining grooves, ensuring concentricity and perpendicularity between the rotor shaft 3 and motor 2. After positioning, the rotor shaft 3 is secured to the motor rotor via screws set in the fourth screw holes and the second fixing holes. A third screw hole 31 is provided at the center of the top of rotor shaft 3 for connecting a dial indicator, used to measure the concentricity of the stator and rotor of the angle encoder.

[0036] The encoder stator 5 is provided with a plurality of third fixing holes, and the end cover 4 is provided with fifth screw holes corresponding to the third fixing holes. The encoder stator 5 is fixed to the end cover 4 by screws provided in the fifth screw holes and the third fixing holes.

[0037] The encoder stator 5 is also provided with several positioning holes, and the end cover is provided with positioning pins at positions corresponding to the positioning holes. The encoder stator is positioned on the end cover through the cooperation of the positioning holes and the positioning pins, ensuring the concentricity and parallelism between the end cover 4 and the encoder stator 5.

[0038] The encoder rotor 6 is provided with a plurality of fourth fixing holes, and the clamping ring 7 is provided with sixth screw holes corresponding to the fourth fixing holes. The encoder rotor 6 is fixed to the clamping ring 7 by screws provided in the sixth screw holes and the fourth fixing holes.

[0039] In this embodiment, the end cover 4, the encoder stator 5 and the encoder rotor 6 are all ring-shaped, and the rotor shaft 3 can pass through the inner rings of the end cover 4, the encoder stator 5 and the encoder rotor 6 and then be connected to the clamping ring 7;

[0040] The clamping ring 7 is in the shape of a ring with a notch on one side, and an axial hole for the rotor shaft 3 to pass through is opened in the center. A through hole is opened on one side of the notch of the clamping ring 7, and a threaded hole is opened on the other side, for a locking screw to pass through the through hole and the threaded hole for fixing and locking. The clamping ring 7 is slidably connected to the rotor shaft 3 and is fixed by a locking screw, so that the position of the clamping ring 7 relative to the rotor shaft 3 can be adjusted, thereby adjusting the installation air gap between the stator and rotor of the angle encoder.

[0041] Combine Figure 3 As shown, the end cover 4 is provided with a first fixing hole corresponding to the first screw hole 11, and the bottom surface of the end cover is provided with an annular limiting ring 41. The outer diameter of the limiting ring 41 is smaller than the inner diameter of the top of the cage frame 1. When installed, the limiting ring 41 is embedded in the opening of the cage frame 1.

[0042] To align the stator and rotor of the angle encoder, the end cap 4 is attached to the cage 1 using screws inserted into the first screw hole 11 and the first fixing hole. To align the stator and rotor of the angle encoder with the angular encoder, the end cap 4 is attached to the cage 1 using a set screw inserted into the second screw hole 12, which abuts against the retaining ring 41. Because the second screw hole 12 is radially positioned, rotating the set screw adjusts the position of the end cap 4 relative to the axis of the motor 2, thereby adjusting the eccentricity between the stator and rotor of the angle encoder. The inner ring of the end cap 4 and the axial hole are larger than the diameter of the rotor shaft 3, providing a margin for adjusting the eccentricity between the stator and rotor of the angle encoder.

[0043] In this embodiment, a plurality of groups of sixth screw holes and fifth screw holes are respectively provided on the clamping ring 7 and the end cover 4. Each group of sixth screw holes and fifth screw holes is distributed along the circumference. Different groups of screw holes can be selected according to the encoder stator and encoder rotor, and can be used to connect encoder stators 5 and encoder rotors 6 of different sizes.

[0044] In this embodiment, the end cover 4 is provided with a wire outlet hole for the encoder stator 5; the side of the cage is provided with a square hole for the motor wire outlet, and the square hole can also be used to observe the rotation status of the internal motor.

[0045] During installation of this embodiment, first, the motor 2 is screwed to the bottom surface of the cage 1. A dial indicator is set in the first screw hole of the cage 1 to adjust the concentricity and parallelism between the cage 1 and the motor 2. The rotor shaft 3 is then fixed to the rotor at the top of the motor 2 and positioned using the groove on the bottom surface of the rotor shaft 3 to ensure the concentricity and perpendicularity of the rotor shaft 3 and the motor 1. The end cover 4 is then installed on the cage 1. Next, the encoder stator 5 is installed on the end cover 4. A dial indicator is set in the third screw hole 31 at the top center of the rotor shaft 3 to adjust the concentricity and perpendicularity between the encoder stator 5 and the rotor shaft 3. Finally, the encoder rotor 6 is installed on the clamping ring 7. After assembly, the encoder is mounted on the rotor shaft 3 via the clamping ring 7. After installation, the angle encoder and the motor 1 can maintain a high degree of concentricity and parallelism.

[0046] The above installation process is for the angle encoder stator and rotor in a concentric state. The eccentric state is similar and will not be described here. Example 2

[0047] See also Figures 1 and 2 The angle encoder test fixture shown includes a motor 1, a motor mounting cage base 2, a rotor shaft 3, an angle encoder stator mounting end cap 4, and an angle encoder rotor mounting clamping ring 7. The installation object of this embodiment is a non-contact angle encoder with a diameter of 75 mm.

[0048] The motor 1 is fixed to the bottom surface of the motor mounting cage base 2 with screws, and the concentricity and parallelism between the motor mounting cage base 2 and the motor 1 are adjusted.

[0049] The rotor shaft 3 is fixed to the rotor at the top of the motor 1 and is positioned by a groove on the bottom surface of the rotor shaft 3 , thereby ensuring the concentricity and perpendicularity of the rotor shaft 3 and the motor 1 .

[0050] The angle encoder stator mounting end cover 4 is installed on the motor mounting cage base 2, and the angle encoder stator 5 is installed on the angle encoder stator mounting end cover 4 through the fixing holes. After adjusting the concentricity and perpendicularity between the angle encoder stator 5 and the rotor shaft 3, fix the angle encoder stator mounting end cover 4 and the motor mounting cage base 2, the angle encoder stator 5 and the angle encoder stator mounting end cover 4 with screws.

[0051] The angle encoder rotor 6 is mounted on the angle encoder rotor mounting clamping ring 7 through the fixing hole. After assembly, it is mounted on the rotor shaft 3 through the angle encoder rotor mounting clamping ring 7 and is fixed by screws on the side of the angle encoder rotor mounting clamping ring 7. Example

[0052] See also Figure 4 、 Figure 5 and Figure 6As shown, the installation object of this embodiment is a non-contact angle encoder with a diameter of 175 mm. The test fixture of this embodiment is basically the same as that of the first embodiment, except that:

[0053] The position of the fixing hole on the bottom surface of the cage 1 can be modified according to the position of the fixing hole on the bottom surface of the motor 2, the shape of the bottom groove of the rotor shaft 3 can be modified according to the shape of the motor rotor of the motor 1, and the position of the fixing hole can be modified according to the position of the fixing hole on the rotor of the motor 1.

[0054] The diameter of the central axis hole in end cap 4 can be adjusted based on the diameter of the through hole in encoder stator 5. The position of the fixing holes in end cap 4 can be adjusted based on the position of the fixing holes in the angle encoder stator 5. The position of the square hole for the wire outlet can be modified based on the position of the wire outlet in the encoder stator 5. Since the diameter of the angle encoder in this embodiment is 175 mm, the position and shape of the fixing holes in end cap 4 and the position of the square hole for the wire outlet need to be modified accordingly.

[0055] The mounting holes in the clamping ring 7 for mounting the encoder rotor 6 can be modified to accommodate angle encoders of different sizes. The inner diameter of the clamping ring 7 can be designed based on the diameter of the major axis of the rotor shaft 3. Since the angle encoder in this embodiment has a diameter of 175 mm, the position and shape of the mounting holes for the clamping ring 7 on the angle encoder rotor were modified accordingly.

[0056] The axial position of the angle encoder rotor mounting clamping ring 7 on the rotor shaft 3 can be adjusted by adjusting the tightness of the screws on the side of the clamping ring 7. This allows the air gap between the encoder stator 5 and the encoder rotor 6 to be adjusted. The concentricity between the encoder stator 5 and the encoder rotor 6 can be adjusted by adjusting the concentricity between the end cap 4 and the rotor shaft 3.

[0057] The test fixture of this embodiment can be used for testing and debugging encoders under different installation air gaps, while taking into account the conditions of being able to adjust the product eccentricity and being able to be installed and fixed after adjusting the appropriate eccentricity range.

[0058] The technical solutions of the present invention are not limited to the above embodiments, and any technical solutions obtained by equivalent replacement methods fall within the scope of protection required by the present invention.

Claims

1. A test fixture for an angle encoder with adjustable eccentricity, the angle encoder comprising an encoder stator and an encoder rotor, characterized in that: The test fixture includes a cage, a motor, a rotor shaft, an end cover and a clamping ring; The cage has an opening at the top, a plurality of first screw holes for connecting the end covers and arranged along the axial direction of the cage are provided on the edge of the top of the cage, and a plurality of second screw holes for connecting the end covers and arranged along the radial direction of the cage are provided on the top of the side wall of the cage; The motor is installed in the cage, a motor rotor is provided on the top of the motor, the rotor shaft is connected to the motor rotor, and a third screw hole for connecting a measuring meter is provided at the center of the top of the rotor shaft; The encoder stator is connected to the end cover, and the encoder rotor is connected to the clamping ring. The end cover, encoder stator and encoder rotor are all ring-shaped. The rotor shaft passes through the inner ring of the end cover, encoder stator and encoder rotor and is connected to the clamping ring. The end cover is provided with a first fixing hole at a position corresponding to the first screw hole, and an annular limiting ring is provided on the bottom surface of the end cover. The outer diameter of the limiting ring is smaller than the inner diameter of the top of the cage, and the limiting ring is embedded in the opening of the cage; The end cover is connected to the cage frame by screws arranged in the first screw hole and the first fixing hole, or is connected to the cage frame by abutting against a limit ring by a top screw arranged in the second screw hole.

2. The angular encoder test fixture with adjustable eccentricity according to claim 1, characterized in that: The motor rotor is annular, and the top surface of the motor rotor protrudes from the top surface of the motor; a limiting groove is provided at the bottom of the rotor shaft, and the outer ring diameter of the motor rotor matches the inner diameter of the limiting groove.

3. The angular encoder test fixture with adjustable eccentricity according to claim 2, characterized in that: The motor rotor is provided with a plurality of fourth screw holes, the rotor shaft is provided with a second fixing hole at a position corresponding to the fifth screw hole, and the rotor shaft is fixed to the motor rotor by screws arranged in the fourth screw holes and the second fixing holes.

4. The angular encoder test fixture with adjustable eccentricity according to any one of claims 1 to 3, characterized in that: The encoder stator is provided with a plurality of third fixing holes, and the end cover is provided with fifth screw holes corresponding to the third fixing holes. The encoder stator is fixed to the end cover by screws arranged in the fifth screw holes and the third fixing holes.

5. The angular encoder test fixture with adjustable eccentricity according to claim 4, characterized in that: The encoder stator is provided with a plurality of positioning holes, and the end cover is provided with positioning pins at positions corresponding to the positioning holes. The encoder stator is positioned on the end cover through the cooperation between the positioning holes and the positioning pins.

6. The angular encoder test fixture with adjustable eccentricity according to claim 5, characterized in that: The encoder rotor is provided with a plurality of fourth fixing holes, the clamping ring is provided with sixth screw holes corresponding to the fourth fixing holes, and the encoder rotor is fixed to the clamping ring by screws arranged in the sixth screw holes and the fourth fixing holes.

7. The angular encoder test fixture with adjustable eccentricity according to claim 6, characterized in that: The clamping ring is in the shape of a ring with a notch on one side. A locking screw is provided at the notch. The clamping ring is slidably connected to the rotor shaft and is fixed by the locking screw.

8. The angular encoder test fixture with adjustable eccentricity according to claim 7, characterized in that: The end cover and the clamping ring are respectively provided with a plurality of groups of fifth screw holes and sixth screw holes, each group of fifth screw holes and sixth screw holes is distributed along the circumference and is used to connect encoder stators and encoder rotors of different sizes.

9. The angular encoder test fixture with adjustable eccentricity according to claim 8, characterized in that: The end cover is provided with a wire outlet hole for the encoder stator wire outlet.

10. The angular encoder test fixture with adjustable eccentricity according to claim 9, characterized in that: The side of the cage is provided with a square hole for the motor wire outlet.

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