Angle encoder switching tool clamp

Abstract

The utility model provides an angle encoder adapter tool clamp, which comprises a stator base, an encoder stator, an encoder rotor, a rotor shaft sleeve, a crossed roller, a rotor adapter piece, an adapter shaft sleeve, a mounting bracket and a transmission belt, and is characterized in that the adapter shaft sleeve is in transmission connection with the rotor shaft sleeve through the transmission belt; the encoder stator and the encoder rotor are both in a circular ring shape, the installation support and the encoder stator are both installed on the stator base, and the encoder stator, the crossed roller, the rotor adapter, the encoder rotor and the rotor shaft sleeve are all coaxially installed. According to the angle encoder switching tool clamp, rotation of a small-size measured device is synchronized to the encoder, and a large-size angle encoder is measured, so that measurement of the measured device is realized. Through the design of the adapter shaft sleeve and the rotor shaft sleeve of different sizes, the clamp can adapt to various miniature and small rotating shafts, and the angle measurement of a large-size encoder on a small-size rotating body is realized.

Description

Technical Field

[0001] The utility model relates to an angle encoder transfer fixture, which is used for testing the angle of a small motor or other micro or small rotating bodies. Background Art

[0002] Angle encoders are electromechanical devices that convert rotational position or rotational quantity into analog or digital signals. They are used for position control and angle measurement in equipment such as machine tools, robots, and automated production lines to achieve precise motion control and positioning.

[0003] The speed with which an angle encoder responds to angle changes is usually expressed in pulses per second or frequency. Fast-response encoders can accurately and promptly reflect angle changes and are suitable for high-speed rotation or fast dynamic measurement applications.

[0004] Non-contact encoders are commonly used to measure the angles of micro-axes, small shafts, and rotating bodies. Non-contact magnetic angle encoders operate based on the principle of magnetic induction, detecting changes in the magnetic field to determine the rotation angle. They offer a simple structure, compact size, and strong resistance to vibration and shock. They are suitable for harsh environments and space-constrained applications, such as automotive and industrial automation equipment.

[0005] Measuring the angles of micro-axes, small shafts, and rotating bodies typically requires a fixture to connect the test piece to the angle encoder. Most existing non-contact encoder test fixtures use D-shaped shaft holes or direct flange connections. Since measurement accuracy is positively correlated with encoder size, small encoders generally have weaker hardware performance due to limited design space. Furthermore, coaxial mounting of small encoders on the shaft is relatively difficult, which can easily lead to distorted angle measurements. These issues make it difficult to obtain accurate angle data during motor rotation on small and micro shafts, necessitating design improvements. Summary of the Invention

[0006] Aiming at the problems existing in the prior art, the utility model provides an angle encoder adapter fixture, which is suitable for angle measurement of various micro shafts, small shafts and rotating bodies.

[0007] The specific technical solutions of the utility model are as follows:

[0008] An angle encoder adapter fixture includes a stator base, an encoder stator, an encoder rotor, a rotor sleeve, a cross roller, a rotor adapter, an adapter sleeve, a mounting bracket and a transmission belt.

[0009] The adapter sleeve is used to connect with the rotating shaft of the measured object, the mounting bracket is used to position and install the measured object, and the adapter sleeve and the rotor sleeve are connected by a transmission belt;

[0010] The encoder stator and encoder rotor are both annular, the mounting bracket and encoder stator are both mounted on the stator base, and the encoder stator, cross roller, rotor adapter, encoder rotor and rotor sleeve are all coaxially mounted;

[0011] The encoder stator and cross roller are both connected to the stator base. The cross roller is sleeved in the encoder stator and connected to the stator base through the static ring of the cross roller. The dynamic ring of the cross roller is rotationally connected to the rotor adapter. The encoder rotor and rotor sleeve are both connected to the rotor adapter. The encoder rotor is sleeved on the periphery of the rotor adapter, and the rotor sleeve is installed in the middle of the rotor adapter.

[0012] Furthermore, the stator base is provided with two groups of positioning grooves, the mounting bracket is installed in one group of positioning grooves, and the encoder stator is installed in the other group of positioning grooves.

[0013] Furthermore, the rotor adapter is in the shape of a boss, and is provided with fixing holes for connecting with the encoder rotor on its periphery, and a fixing hole for connecting with the rotor sleeve is provided on the middle boss.

[0014] Furthermore, a radial screw hole is provided inside the adapter sleeve, and the adapter sleeve is fixedly connected to the rotating shaft of the measured object by tightening the screws.

[0015] Furthermore, the stator base, encoder stator, cross roller, rotor adapter, encoder rotor, rotor sleeve and mounting bracket are all connected by screw positioning.

[0016] Furthermore, the adapter sleeve and the rotor sleeve adopt a rotating shaft structure or a gear structure, and a transmission belt structure matches it.

[0017] Furthermore, the encoder is a contactless encoder.

[0018] Furthermore, both sides of the mounting bracket are connected to the stator base, a groove is provided in the center of the mounting bracket, and an axial hole for inserting the rotating shaft of the measured object is provided in the center of the groove.

[0019] Compared with the prior art, the present invention has the following beneficial effects:

[0020] This new angle encoder adapter fixture synchronizes the rotation of a small device under test with the encoder, allowing it to measure the angle of a larger encoder. By designing adapter sleeves and rotor sleeves of varying sizes, the fixture adapts to various miniature and small rotating shafts, enabling angle measurement of a small rotating object using a large encoder.

[0021] This new angle encoder adapter fixture coaxially mounts large encoders using a stator base, cross rollers, a rotor adapter, and a rotor sleeve, ensuring that the stator and rotor are installed in the correct configuration. A fixed diameter ratio between the rotor sleeve and the adapter sleeve determines the transmission relationship. With the help of a transmission belt, the rotation of the device under test is synchronized with the encoder for measurement. Since the encoder's size is no longer directly limited by the shaft size of the device under test, larger encoders can be used, facilitating the coaxial installation of the encoder's stator and rotor.

[0022] This new angle encoder adapter fixture is easy to assemble. The design connects the various components using screws and drive belts, making installation simple and convenient, requiring no special tools or techniques. For different measured rotating axes, simply replace the adapter sleeve to achieve assembly. This new angle encoder adapter fixture improves encoder installation accuracy, enhancing concentricity and parallelism.

[0023] The utility model can be quickly installed and disassembled, is suitable for various production and testing links, and realizes angle measurement of small-sized devices under test. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art.

[0025] Figure 1 This is an exploded view of the installation of the angle encoder of the utility model;

[0026] Figure 2 This is a schematic diagram of the installation of the angle encoder of the present utility model;

[0027] Figure 3 for Figure 1 Schematic diagram of the assembled structure;

[0028] Figure 4 for Figure 1 A top view of

[0029] Figure 5 for Figure 1 Side view of

[0030] In the figure: 1-motor; 2-mounting bracket; 3-stator base; 4-adapter sleeve; 5-drive belt; 6-rotor sleeve; 7-rotor adapter; 8-encoder rotor; 9-encoder stator; 10-cross roller; 11-long screw. DETAILED DESCRIPTION

[0031] The following will be combined with the accompanying drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. The following embodiments are intended as special examples of the present invention and are not intended to limit the use process. Example 1

[0032] like Figure 1 、 Figure 3 As shown, the angle encoder adapter fixture of the present invention is used to measure the angle of a rotating shaft such as a motor 1, and includes: a mounting bracket 2, a stator base 3, an adapter sleeve 4, a transmission belt 5, a rotor sleeve 6, a rotor adapter 7, an encoder rotor 8, an encoder stator 9, and a cross roller 10.

[0033] The adapter sleeve 6 is used to connect to the rotating shaft of the test piece, the mounting bracket 2 is used to position and install the test piece, and the adapter sleeve 4 and the rotor sleeve 6 are connected through the transmission belt 5; (the installation positions of the adapter sleeve, rotor sleeve and transmission belt are at the same horizontal height).

[0034] The encoder stator 9 and the encoder rotor 8 are both annular, the mounting bracket 2 and the encoder stator 9 are both mounted on the stator base 3, and the encoder stator 9, the cross roller 10, the rotor adapter 7, the encoder rotor 8 and the rotor sleeve 4 are all coaxially mounted.

[0035] The encoder stator 9 and the cross roller 10 are both connected to the stator base 3. The cross roller 10 is sleeved inside the encoder stator 1 and connected to the stator base 3 through the stationary ring of the cross roller; the moving ring of the cross roller is rotationally connected to the rotor adapter 7; the encoder rotor 8 and the rotor sleeve 6 are both connected to the rotor adapter 7. The encoder rotor 8 is sleeved on the periphery of the rotor adapter 7, and the rotor sleeve 6 is installed in the middle of the rotor adapter 7.

[0036] The adapter sleeve 4 and the rotor sleeve 6 can adopt a rotating shaft structure or a gear structure, and the transmission belt 5 can be matched with a crawler belt or a crawler belt matched with the gear. Example 2

[0037] like Figures 1 to 5 As shown, the angle encoder adapter fixture of the present invention includes: a mounting bracket 2, a stator base 3, an adapter sleeve 4, a transmission belt 5, a rotor sleeve 6, a rotor adapter 7, an encoder rotor 8, an encoder stator 9, and a cross roller 10.

[0038] This embodiment provides a non-contact encoder, a magnetic induction encoder, which has a diameter of 175 mm. The diameter of the shaft of the small stepping motor to be measured is 42 mm.

[0039] The stator base 3 has two grooves at its bottom. The circular groove has eight evenly spaced fixing holes, while the rectangular groove has four evenly spaced fixing holes. Mounting bracket 2 is attached to the rectangular groove of stator base 3 using four screws. Mounting bracket 2 is a sheet metal component with a groove in the center, and an axial hole in the center of the groove.

[0040] The rotor adapter 7 is a boss-shaped component with eight fixing holes around its perimeter, four of which are located on the boss. The rotor sleeve 6 has four evenly spaced axial holes around its perimeter for connection to the four fixing holes on the rotor adapter's boss. The cylindrical shape in the center of the rotor sleeve 6 provides support for the drive belt. The ring-shaped portion (not the boss) cut out of the center of the rotor adapter 7 prevents contact between the cross roller 10 and the fixed, non-rotating portion of its outer ring.

[0041] Long screws 11 pass through the positioning holes of the rotor sleeve 6 and the rotor adapter 7, aligning them with the inner ring holes of the cross roller 10, enabling mutual transmission. The rotor adapter 7 and encoder rotor 8 are fixed with screws. The inner ring of the rotor adapter 7 has eight holes that secure it to the inner ring of the cross roller 10.

[0042] There is a groove between the inner and outer rings of the cross roller 10, which contains balls. The rotor adapter 7 covers the cross roller 10. The holes in the outer ring of the cross roller 10 are aligned with the circular groove holes in the stator base 3 for installation. Then, align the four holes of the encoder stator 9 and install it on the stator base 3.

[0043] The outer ring of the cross roller 10 is a stationary ring, and the inner ring is a dynamic ring. The cross roller 10 is connected to the stator base 3 and the rotor adapter 7 respectively.

[0044] When the stator base 3 is connected to the cross roller 10, the screws cooperate with the holes on the lower surface of the groove of the stator base 3. The outer ring of the cross roller is fixed and cannot rotate, ensuring the concentricity and verticality between the stator base 3 and the cross roller 10.

[0045] After the stator base 3 and cross rollers 10 are installed, the encoder stator 9 is installed on the upper surface of the stator base 3 to ensure the concentricity and perpendicularity of the stator base 3 and cross rollers 10. The hole position on the upper surface of the stator base 3 can be adjusted and modified according to the size and hole position of the encoder stator 9.

[0046] The rotor sleeve 6 is installed on the inner ring of the cross roller 10 by passing through the positioning hole of the rotor adapter 7 through a long screw. The inner ring is a movable ring and can rotate, thereby realizing the rotation of the cross roller 10 and the rotor sleeve 6, thereby driving the rotor adapter 7 to rotate, realizing the mutual transmission of the rotor sleeve 6, the rotor adapter 7 and the cross roller 10.

[0047] Encoder rotor 8 is mounted on rotor adapter 7, ensuring concentricity and perpendicularity among encoder rotor 8, rotor adapter 7, and cross roller 10. This also enables transmission between rotor sleeve 6, rotor adapter 7, cross roller 10, and encoder rotor 8. Simultaneously, one end of a transmission belt 5 is fitted over rotor sleeve 6, and the other end over adapter sleeve 4. This ensures that motor 1 rotates, driving adapter sleeve 4. This, in turn, drives rotor sleeve 6 via transmission belt 5, which in turn drives the rotor adapter, encoder rotor 8, and cross roller 10, achieving angle measurement.

[0048] The adapter sleeve 4 is transmitted to the rotor sleeve 6 through the transmission belt 5. The type of the transmission belt is not limited and is matched based on the fixed shaft of the motor. For example, for the measured shaft with a gear-shaped cross-section, the transmission belt uses a crawler belt that matches the gear. Example 3

[0049] This example is further designed on the basis of the first embodiment: Figure 1 As shown, two groups of positioning grooves are provided on the stator base 3, one group of square positioning grooves is used to install the mounting bracket 2, and the other group of circular positioning grooves is used to install the encoder stator 9.

[0050] The rotor adapter 7 is in the shape of a boss. Four fixing holes are provided around the rotor adapter 7 for connecting with the encoder rotor, and eight fixing holes are provided on the middle boss for connecting with the rotor sleeve. Example 4

[0051] This example is further designed on the basis of the third embodiment: Figure 1 As shown, both sides of the mounting bracket 2 are connected to the stator base 3 , a groove is provided in the center of the mounting bracket 2 , and an axial hole for inserting the rotating shaft of the test piece is provided in the center of the groove.

[0052] Adapter sleeve 4 is internally provided with radial threaded holes, and is secured to the rotating shaft of the test piece by tightening screws, ensuring concentricity and perpendicularity between adapter sleeve 4 and the shaft of motor 1. The stator base 3, encoder stator 8, cross roller 10, rotor adapter 7, encoder rotor 8, rotor sleeve 6, and mounting bracket 2 are all secured with screws. Example 5

[0053] This example is further designed on the basis of the third embodiment: Figure 1 As shown, the angle encoder of the present invention can be a non-contact angle encoder or other encoder, specifically a magnetic induction angle encoder. The stator of the angle encoder is equipped with an excitation coil and a detection coil, while the rotor of the encoder is equipped with an induction coil. Based on the principle of transmission, the rotational speed of the encoder rotor is in a fixed ratio with the rotational speed of the adapter sleeve, thus inferring the current rotational speed of the measured shaft.

[0054] During installation, first secure the encoder stator 9 and cross roller 10 to the stator base 3 with screws. The outer diameter of the cross roller 10 should be smaller than the inner diameter of the encoder stator 9 to ensure friction-free rotation. Next, screw the rotor adapter 7 onto the cross roller 10. Screw the encoder rotor 8 and the rotor sleeve 6 together to form a single unit. Install it onto the rotor adapter 7 and then mount it to the stator base 3 using a dial indicator. Test the coaxiality of the encoder stator 9 and encoder rotor 8, adjusting them as closely as possible. After adjustment, remove the dial indicator.

[0055] Install the mounting bracket 2 and the motor 1 shaft onto the stator base 3 using screws. Fasten the mounting bracket 2 and the motor 1 shaft onto the shaft being measured using the adapter sleeve 4. Finally, install the transmission belt 5 with tension on one end to the adapter sleeve 4 and the other end to the rotor sleeve 6.

[0056] As the motor 1 shaft rotates, its rotation angle is converted to the encoder rotor 8 at a fixed ratio by the adapter sleeve 4, drive belt 5, and rotor sleeve 6. By resolving the encoder angle at this fixed ratio, the motor 1 shaft rotation angle can be determined. For motor shafts of varying sizes, simply using an adapter sleeve 4 with the same outer diameter ensures the angle conversion ratio remains constant, eliminating the need to change the resolution method.

Claims

1. An angle encoder adapter fixture, characterized in that: Includes stator base, encoder stator, encoder rotor, rotor bushing, cross roller, rotor adapter, adapter bushing, mounting bracket and transmission belt, The adapter sleeve is used to connect with the rotating shaft of the measured object, the mounting bracket is used to position and install the measured object, and the adapter sleeve and the rotor sleeve are connected by a transmission belt; The encoder stator and encoder rotor are both annular, the mounting bracket and encoder stator are both mounted on the stator base, and the encoder stator, cross roller, rotor adapter, encoder rotor and rotor sleeve are all coaxially mounted; The encoder stator and cross roller are both connected to the stator base. The cross roller is sleeved in the encoder stator and connected to the stator base through the static ring of the cross roller. The dynamic ring of the cross roller is rotationally connected to the rotor adapter. The encoder rotor and rotor sleeve are both connected to the rotor adapter. The encoder rotor is sleeved on the periphery of the rotor adapter, and the rotor sleeve is installed in the middle of the rotor adapter.

2. The angle encoder adapter fixture according to claim 1, characterized in that: The stator base is provided with two groups of positioning grooves, the mounting bracket is installed in one group of positioning grooves, and the encoder stator is installed in the other group of positioning grooves.

3. The angle encoder adapter fixture according to claim 2, characterized in that: The rotor adapter is in the shape of a boss. Fixing holes for connecting with the encoder rotor are provided on the periphery of the rotor adapter, and a fixing hole for connecting with the rotor sleeve is provided on the middle boss.

4. The angle encoder adapter fixture according to claim 3, characterized in that: The adapter sleeve is provided with radial screw holes inside, and the adapter sleeve is fixedly connected to the rotating shaft of the measured object by tightening screws.

5. The angle encoder adapter fixture according to any one of claims 1 to 4, characterized in that: The stator base, encoder stator, cross roller, rotor adapter, encoder rotor, rotor sleeve and mounting bracket are all connected by screw positioning.

6. The angle encoder adapter fixture according to claim 5, characterized in that: The adapter sleeve and the rotor sleeve adopt a rotating shaft structure or a gear structure, and a transmission belt structure matches it.

7. The angle encoder adapter fixture according to claim 1, characterized in that: The encoder is a contactless encoder.

8. The angle encoder adapter fixture according to claim 1, characterized in that: Both sides of the mounting bracket are connected to the stator base. A groove is provided in the center of the mounting bracket, and an axis hole for inserting the rotating axis of the measured object is provided in the center of the groove.

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