Switching jig for calibrating precision of rotary encoder

Abstract

The utility model discloses a switching jig for calibrating the precision of a rotary encoder. The jig comprises two vertical bearing plates, a horizontal locking plate and a hollow locking sleeve, the two bearing plates are connected to the left side and the right side of the locking plate respectively, and the locking sleeve is installed on the locking plate; wherein a vertically-through circular through opening is formed in the locking plate, the lower portion of the circular through opening extends towards the periphery to form an annular groove, the locking sleeve comprises a hollow cylindrical mounting sleeve and a hollow cylindrical locking sleeve which are connected, the cylindrical locking sleeve is inserted into the circular through opening, and the cylindrical mounting sleeve is connected with the annular groove. Four locking holes penetrating through the interior of the cylindrical locking sleeve are evenly distributed in the outer side face of the cylindrical locking sleeve. The adapter jig for calibrating the precision of the rotary encoder is used for calibrating the precision numerical value of the rotary encoder and fixing the position of an output shaft in a four-side locking manner, can ensure the concentricity, and is convenient to disassemble, so that motors with different shaft diameters can be calibrated.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of numerical control machine tool, especially a kind of adapter fixture for calibrating the precision of rotary encoder. BACKGROUND

[0002] With the continuous rapid development of numerical control machine tool industry, the demand for high-precision motor and encoder is higher and higher, and when developing encoder, absolute accuracy calibration and repeatability verification need to be carried out for the encoder, and different performance requirements generated by the installation of the encoder on different motors need to be verified repeatedly, so the concentricity and eccentricity of the shaft sleeve and the shaft of the motor are required higher and higher.

[0003] At present, the way of calibrating encoder precision on the market generally adopts the way of thermal expansion sleeve to fix the shaft, and the thermal expansion sleeve cannot be removed after calibration, so if the motor needs to be replaced for calibration of split, integral or magnetic ring encoder, the experiment cannot be carried out, and a complete set of fixture needs to be re-made, so it is very inconvenient.

[0004] If a kind of fixture for calibrating encoder precision is designed to ensure concentricity and facilitate disassembly, the following difficulties need to be considered:

[0005] 1. How to design a structure to fix the motor shaft, so that it can fully consider the concentricity when the shaft is locked with the shaft sleeve, and avoid the phenomenon of too large error in encoder precision measurement caused by physical locking bias;

[0006] 2. How to ensure that the shaft locking fixture is easy to disassemble to meet the needs of encoder precision measurement with different shaft diameter motors;

[0007] 3. How to realize the reasonable assembly between the shaft fixture and the rotating shaft, without affecting the overall structure and normal operation of the equipment. INVENTION CONTENTS

[0008] To solve the above problems, the utility model provides a kind of adapter fixture for calibrating the precision of rotary encoder, which is used for the precision value of rotary encoder and the way of four-face locking to fix the position of the shaft, which can ensure the concentricity and facilitate disassembly, so as to calibrate the motor of different shaft diameter.

[0009] According to one aspect of the utility model, a kind of adapter fixture for calibrating the precision of rotary encoder is provided, including two vertical receiving plates, a horizontal locking plate and a hollow locking sleeve, two the receiving plate is respectively connected in the left and right sides of the locking plate, the locking sleeve is installed on the locking plate;Wherein, a circular port that is formed in the locking plate is through from top to bottom, the lower part of the circular port extends to the periphery and forms an annular groove, the locking sleeve includes a hollow cylindrical mounting sleeve and a hollow cylindrical locking sleeve connected, the cylindrical mounting sleeve is installed above the locking plate, the cylindrical locking sleeve is inserted into the circular port, four locking holes that pass through the inside of the outer side of the cylindrical locking sleeve are uniformly distributed, each locking hole is at the same height with the annular groove.

[0010] In some embodiments, the receiving plate is made of aluminum. It is beneficial to describe the material of the receiving plate.

[0011] In some embodiments, two first connection holes are provided at the top of the two receiving plates, and four second connection holes are provided at the front and rear ends of the left and right sides of the locking plate. Each first connection hole is connected to each second connection hole by a screw. It is beneficial to describe the specific connection method of the two receiving plates and the locking plate.

[0012] In some embodiments, a through groove is formed in the middle of the cylindrical mounting sleeve and the cylindrical locking sleeve. It is beneficial that the through groove can be fitted on the rotating shaft of the motor.

[0013] In some embodiments, a plurality of first mounting holes are provided on the locking plate, and a plurality of second mounting holes are provided on the cylindrical mounting sleeve. Each first mounting hole is connected to each second mounting hole by a screw. It is beneficial to describe the specific connection method of the locking plate and the locking sleeve.

[0014] In some embodiments, four outwardly recessed semicircular grooves are uniformly distributed on the circumference of the annular groove, and each semicircular groove is in the same direction as each locking hole. It is beneficial to further facilitate the fixation of the motor rotating shaft through each locking hole by providing each semicircular groove.

[0015] In some embodiments, a plurality of motor mounting holes are provided on the top surface of the annular groove. It is beneficial that each motor mounting hole can be used to install a motor by a screw.

[0016] In some embodiments, an annular plate is formed at the top of the cylindrical mounting sleeve. This is advantageous because the annular plate facilitates the installation of a corresponding structure above the locking sleeve. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of a calibrating rotary encoder accuracy according to one embodiment of the present invention.

[0018] Figure 2 for Figure 1 The diagram shows the structure of the support plate.

[0019] Figure 3 for Figure 1 A schematic diagram of the bottom structure of the locking plate shown;

[0020] Figure 4 for Figure 1 The diagram shows the structure of the locking sleeve.

[0021] In the figure: receiving plate 1, locking plate 2, locking sleeve 3, first connecting hole 11, circular through hole 21, annular groove 22, second connecting hole 23, first mounting hole 24, semi-circular groove 25, motor mounting hole 26, cylindrical mounting sleeve 31, cylindrical locking sleeve 32, locking hole 33, through groove 34, second mounting hole 35, annular piece 36. Detailed Implementation

[0022] The present invention will now be described in further detail with reference to the accompanying drawings.

[0023] like Figures 1-4 As shown, the fixture mainly includes two vertical support plates 1, a horizontal locking plate 2, and a hollow locking sleeve 3. The two support plates 1 are respectively connected to both sides (left and right sides) of the locking plate 2 and support the locking plate 2 from below, while the locking sleeve 3 is installed on the locking plate 2.

[0024] Preferably, the two support plates 1 are made of aluminum.

[0025] Preferably, two first connecting holes 11 are provided at the top ends (front and rear ends) of the two supporting plates 1, and four second connecting holes 23 are provided at the front and rear ends of the left and right sides of the locking plate 2. Each first connecting hole 11 and each second connecting hole 23 are connected by screws, thereby stably connecting the two supporting plates 1 to the two sides of the locking plate 2.

[0026] A circular through hole 21 is formed in the middle of the bottom surface of the locking plate 2, and the locking sleeve 3 comprises a hollow cylindrical mounting sleeve 31 and a hollow cylindrical locking sleeve 32 connected below the cylindrical mounting sleeve 31. The cylindrical mounting sleeve 31 is mounted above the locking plate 2, and the cylindrical locking sleeve 32 is inserted into the circular through hole 21.

[0027] The lower part of the circular through hole 21 extends peripherally to form an annular groove 22, and four locking holes 33 are uniformly distributed on the outer surface of the cylindrical locking sleeve 32, each of which penetrates the inside of the cylindrical locking sleeve 32 and is at the same height as the annular groove 22. The locking holes 33 can be used to lock the rotating shaft of the motor passing through the cylindrical locking sleeve 32 by screws, and the annular groove 22 provides sufficient space for the locking operation.

[0028] Preferably, a through slot 34 is formed in the cylindrical mounting sleeve 31 and the cylindrical locking sleeve 32, and the rotating shaft of the motor can pass through the through slot 34.

[0029] Preferably, a plurality of first mounting holes 24 are provided on the locking plate 2, and a plurality of second mounting holes 35 are provided on the cylindrical mounting sleeve 31, each first mounting hole 24 and each second mounting hole 35 are connected by screws, so as to mount the locking sleeve 3 on the locking plate 2.

[0030] Further preferably, four semicircular grooves 25 are uniformly distributed on the circumference of the annular groove 22 and recessed outward, and the four semicircular grooves 25 are in the same direction as the four locking holes 33 of the cylindrical locking sleeve 32, which can further facilitate the locking of the rotating shaft of the motor.

[0031] Preferably, an annular flange 36 is formed on the top of the cylindrical mounting sleeve 31, which can be used to facilitate the installation of the corresponding structure above the locking sleeve 3.

[0032] Preferably, a plurality of motor mounting holes 26 are provided on the top surface of the annular groove 22, which can be used to install the motor by screws.

[0033] In use, the motor is installed and fixed on the annular groove 22 on the bottom surface of the locking plate 2 from below, the rotating shaft of the motor passes through the circular through hole 21 and extends above the locking plate 2, then the locking sleeve 3 is installed above the circular through hole 21 and is sleeved on the rotating shaft of the motor, and the rotating shaft of the motor is locked by four screws through the four locking holes 33, which can effectively ensure that the rotating shaft of the motor and the locking sleeve 3 are concentric after locking, thereby ensuring the best measurement effect.

[0034] The utility model provides a kind of calibration rotary type encoder precision's adapter fixture mainly has following beneficial effects:

[0035] 1. By using the splicing of receiving plate and locking plate, different frame numbers and different shaft diameters of motor can be lifted, which facilitates installation and replacement in the existing equipment shaft structure, and facilitates verification of different models of motor without the need for separate production of different fixtures;

[0036] 2. By using the four-way locking method of locking sleeve to fix the motor rotating shaft, compared with the common one screw locking, the concentricity and eccentricity are guaranteed;

[0037] 3. The operation difficulty and economic cost are reduced.

[0038] The above is only some embodiments of the utility model. For ordinary skilled persons in the art, without departing from the creative concept of the utility model, a number of modifications and improvements can be made, which are within the protection scope of the utility model.

Claims

1. A calibrating fixture for rotary encoder accuracy, characterized in that: The utility model provides a kind of vertical receiving plate (1), a horizontal locking plate (2) and a hollow locking sleeve (3) are included, two described receiving plate (1) are respectively connected in the left and right sides of described locking plate (2), and described locking sleeve (3) is installed on described locking plate (2);Wherein, a circular port (21) that passes through is formed on the upper and lower of described locking plate (2), the lower portion of the circular port (21) extends to form a annular groove (22) around, and the locking sleeve (3) includes a hollow cylindrical mounting sleeve (31) and a hollow cylindrical locking sleeve (32) connected, the cylindrical mounting sleeve (31) is installed above the locking plate (2), the cylindrical locking sleeve (32) is inserted into the circular port (21), and four locking holes (33) that pass through its inside are uniformly distributed on the outside of the cylindrical locking sleeve (32), and each locking hole (33) is at the same height with the annular groove (22).

2. The precision calibration adapter for rotary encoders of claim 1, wherein: The receiving plate (1) is made of aluminum.

3. The precision calibration fixture for rotary encoders of claim 1, wherein: Two first connecting holes (11) are respectively arranged at the top front and rear ends of the two receiving plates (1), and four second connecting holes (23) are respectively arranged at the front and rear ends of the left and right sides of the locking plate (2), and each first connecting hole (11) is connected with each second connecting hole (23) by a screw.

4. The precision calibration fixture for rotary encoders of claim 1, wherein: A through groove (34) is formed in the middle of the cylindrical mounting sleeve (31) and the cylindrical locking sleeve (32).

5. The precision calibration fixture for rotary encoders of claim 4, wherein: A plurality of first mounting holes (24) that pass through the upper and lower are arranged on the locking plate (2), and a plurality of second mounting holes (35) that pass through the upper and lower are arranged on the cylindrical mounting sleeve (31), and each first mounting hole (24) is connected with each second mounting hole (35) by a screw.

6. The precision calibration fixture for rotary encoders of claim 1, wherein: Four outwardly recessed semicircular grooves (25) are uniformly distributed on the circumference of the annular groove (22), and each semicircular groove (25) is in the same direction as each locking hole (33).

7. The precision calibration fixture for rotary encoders of claim 1, wherein: A plurality of motor mounting holes (26) are arranged on the top surface of the annular groove (22).

8. The precision calibration adapter for rotary encoders of claim 1, wherein: An annular sheet (36) is formed at the top of the cylindrical mounting sleeve (31).

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