Calibrating device of encoder

Abstract

The utility model discloses an encoder calibration device, which comprises a bottom plate and a driving rotating mechanism, the driving rotating mechanism is arranged on the bottom plate, the rotating output end of the driving rotating mechanism is vertically arranged, the upper surface of the bottom plate is rotatably connected with a rotating shaft, and the upper surface of the bottom plate is provided with a locking assembly for fixing the rotating shaft. A connecting block is fixedly connected to the top end of the rotating shaft, mounting plates are fixedly connected to the two sides of the connecting block, a plurality of bolts for fixing the tested encoder are arranged on the upper surfaces of the mounting plates, and a connecting shaft is rotationally connected to the bottom of each mounting plate. According to the utility model, the encoder can be calibrated uninterruptedly, the time is saved, the working efficiency is improved, the displacement of the mounting plates after the rotation of the rotating shaft is completed can be avoided, the use stability of the calibration device is improved, the accurate transposition of the two mounting plates by a worker can be facilitated, and the calibration efficiency is improved. And the use convenience of the calibration device is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of encoders, in particular to a calibration device for encoders. Background Art

[0002] An encoder is a device that compiles and converts signals (such as bit streams) or data into a signal form that can be used for communication, transmission, and storage. It belongs to the category of angular position sensors. The encoder converts angular displacement or linear displacement into electrical signals. The former is called a code disk and the latter is called a code scale. The encoder needs to be calibrated after production is completed.

[0003] A search revealed a Chinese patent with publication number CN221725265U, which discloses an encoder calibration fixture. The fixture includes a fixture carrier, an active rotating mechanism, a reference detector, an encoder under test, a transmission assembly, and a rotating motor under test. However, the fixture exhibits significant random fluctuations in physical resolution accuracy. However, the following drawback remains: after encoder calibration, the encoder must be disassembled before the uncalibrated encoder can be installed. During this disassembly and installation process, the encoder calibration device remains inoperative, resulting in wasted time and significantly reduced work efficiency. Utility Model Content

[0004] The purpose of the utility model is to solve the shortcomings in the prior art and to propose a calibration device for an encoder.

[0005] In order to achieve the above purpose, the present invention adopts the following technical solutions:

[0006] A calibration device for an encoder comprises a base plate and an active rotating mechanism, the active rotating mechanism is mounted on the base plate, and its own rotating output end is vertically arranged, the upper surface of the base plate is rotatably connected to a rotating shaft, the upper surface of the base plate is provided with a locking assembly for fixing the rotating shaft, the top end of the rotating shaft is fixedly connected to a connecting block, both sides of the connecting block are fixedly connected to a mounting plate, the upper surface of the mounting plate is provided with a plurality of bolts for fixing the encoder to be measured, the bottom of the mounting plate is rotatably connected to a connecting shaft, the top end of the connecting shaft is provided with a placement groove, the bottom end of the connecting shaft is fixedly connected with a protrusion, the top end of the rotating output shaft of the active rotating mechanism is provided with a through-type arc groove, and the protrusion is plugged into the arc groove, and the bottom of the base plate is provided with a positioning assembly for positioning the rotation angle of the rotating shaft.

[0007] As a further solution of the present invention, the locking assembly includes a fixing ring, which is arranged on the top of the base plate. The rotating shaft passes through the fixing ring. A plurality of slots are provided on the circumferential inner wall of the fixing ring. A blocking block adapted to the slot is fixedly connected to the outer side of the rotating shaft, and the blocking block is engaged with the slot.

[0008] As a further solution of the present invention, the circumferential outer wall of the fixing ring is symmetrically fixedly connected to two connecting plates, and the top of the base plate is fixedly connected to two guide rods, which pass through the two connecting plates respectively to enable the fixing ring to move vertically.

[0009] As a further solution of the present invention, the top ends of the two guide rods are fixedly connected with a baffle, the outer sides of the two guide rods are sleeved with a spring, and the two ends of the spring are respectively fixed to the connecting plate and the baffle.

[0010] As a further solution of the present invention, the positioning component includes two grooves, both of which are opened at the bottom of the base plate, the bottom end of the rotating shaft passes through the base plate, and one side of the rotating shaft is fixedly connected to a fixed plate at the bottom position, and a through sliding hole is opened at the bottom of the fixed plate, and a positioning column is slidably connected in the sliding hole, and the positioning column is plugged into the groove, the top of the positioning column is provided with a curved surface, and the outer side of the positioning column is provided with an elastic component for supporting the positioning column.

[0011] As a further solution of the present invention, the elastic component includes a tension spring, which is sleeved on the outside of the positioning column. The bottom end of the positioning column is fixedly connected to a fixed block, and the two ends of the tension spring are respectively fixed to the fixed plate and the fixed block.

[0012] As a further solution of the present invention, a plurality of feet for supporting the bottom plate are fixedly connected to the bottom of the bottom plate.

[0013] The beneficial effects of the utility model are:

[0014] 1. Through the setting of two mounting plates, the encoder to be tested is installed on the two mounting plates respectively. After the detection and calibration of one encoder is completed, the two mounting plates are swapped, and then the other encoder is detected and calibrated. At the same time, the calibrated encoder is removed and a new encoder is installed. This cycle is repeated, so that the encoder can be calibrated continuously, saving time and improving work efficiency.

[0015] 2. Through the setting of the locking assembly, after the rotating shaft is rotated to exchange the positions of the two mounting plates, the rotating shaft can be fixed by the locking assembly, thereby preventing the mounting plates from shifting after the rotating shaft is rotated, thereby improving the stability of the calibration device.

[0016] 3. Through the setting of the positioning component, the angle of rotation of the shaft can be positioned by the positioning component during the rotation of the shaft, thereby facilitating the staff to accurately replace the two mounting plates and improving the convenience of using the calibration device. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1This is a schematic diagram of the three-dimensional structure of an encoder calibration device proposed in the present invention;

[0018] Figure 2 This is a schematic diagram of the enlarged structure of part A of an encoder calibration device proposed by the present invention;

[0019] Figure 3 This is a partially enlarged structural diagram of an encoder calibration device proposed in the present invention;

[0020] Figure 4 This is a schematic diagram of the cross-sectional structure of a connecting shaft of an encoder calibration device proposed by the present invention.

[0021] In the figure: 1. Connecting block; 2. Bolt; 3. Mounting plate; 4. Connecting shaft; 5. Active rotating mechanism; 6. Arc groove; 7. Bottom plate; 8. Rotating shaft; 9. Fixing ring; 10. Block; 11. Slot; 12. Spring; 13. Guide rod; 14. Groove; 15. Fixing plate; 16. Positioning column; 17. Tension spring; 18. Arc surface; 19. Bump; 20. Placement slot. DETAILED DESCRIPTION

[0022] It should be noted that the terms "first", "second", etc. in the description and claims of this application and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence, so that the embodiments of this application described here, based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative work should fall within the scope of protection of this application.

[0023] Reference Figures 1-4 , an encoder calibration device, including a base plate 7 and an active rotating mechanism 5, the active rotating mechanism 5 is mounted on the base plate 7, and its own rotation output end is vertically arranged, the active rotating mechanism 5 includes a DD motor and a motor connecting disc, the rotation output end of the DD motor is fixedly connected to the motor connecting disc, and the upper surface of the connecting disc is welded with an output shaft;

[0024] The upper surface of the base plate 7 is rotatably connected with a rotating shaft 8, and the upper surface of the base plate 7 is provided with a locking assembly for fixing the rotating shaft 8. A connecting block 1 is welded to the top of the rotating shaft 8, and mounting plates 3 are welded on both sides of the connecting block 1. The upper surface of the mounting plate 3 is provided with a plurality of bolts 2 for fixing the measured encoder. The bottom of the mounting plate 3 is rotatably connected with a connecting shaft 4, and a placement groove 20 is provided on the top of the connecting shaft 4. A protrusion 19 is welded on the bottom end of the connecting shaft 4. The top of the rotating output shaft of the active rotating mechanism 5 is provided with a through-type arc groove 6, and the protrusion 19 is plugged into the arc groove 6. The bottom of the base plate 7 is provided with a positioning assembly for positioning the rotation angle of the rotating shaft 8. The measured rotating motor is respectively mounted on the two mounting plates 3 by bolts 2, and the output shaft of the measured rotating motor is inserted into the placement groove 20 on the connecting shaft 4 through the mounting plate 3, and the output shaft of the measured rotating motor is key-connected to the connecting shaft 4 through the key bar, and then the measured encoder is The encoder is installed on the top of the rotating motor to be measured by bolts 2. At this time, the protrusion 19 at the bottom of the connecting shaft 4 is located in the arc groove 6 on the rotating output shaft of the active rotating mechanism 5, so that the active rotating mechanism 5 drives the connecting shaft 4 to rotate through the protrusion 19, and the connecting shaft 4 drives the output shaft of the rotating motor to be measured to rotate, so that the reference detector and the encoder to be measured respectively collect angle data, and transmit them back to the calibration system host computer for comparison. After comparison and analysis, the calibration system host computer performs precision calibration and compensation on the encoder to complete the calibration of the encoder to be measured. After the calibration is completed, the rotating shaft 8 is rotated to replace the two mounting plates 3, so that the protrusion 19 on the other connecting shaft 4 enters the arc groove 6, and then the other encoder is calibrated, and the calibrated encoder is removed and a new encoder is installed. This cycle is repeated, so that the encoder can be calibrated continuously, saving time and improving work efficiency.

[0025] In the present invention, the locking assembly includes a fixing ring 9, which is arranged on the top of the base plate 7, and the rotating shaft 8 passes through the fixing ring 9. A plurality of card slots 11 are opened on the circumferential inner wall of the fixing ring 9, and a card block 10 adapted to the card slot 11 is welded on the outer side of the rotating shaft 8, and the card block 10 is clamped with the card slot 11. The circumferential outer wall of the fixing ring 9 is symmetrically welded with two connecting plates, and two guide rods 13 are welded on the top of the base plate 7. The two guide rods 13 pass through the two connecting plates respectively to make the fixing ring 9 move vertically. The tops of the two guide rods 13 are welded with baffles, and the outer sides of the two guide rods 13 are sleeved with springs 12, and the two ends of the spring 12 are respectively connected to the The connecting plate and the baffle are fixed. When the rotating shaft 8 needs to be rotated, the fixing ring 9 is pulled to move vertically upward along the guide rod 13. The fixing ring 9 will drive the connecting plate to move upward and squeeze the spring 12, so that the block 10 on the rotating shaft 8 is disengaged from the slot 11. At this time, the rotating shaft 8 can be rotated, and the rotating shaft 8 will drive the connecting block 1 to rotate. The connecting block 1 drives the two mounting plates 3 to rotate, realizing the transposition of the two mounting plates 3. After the transposition is completed, the fixing ring 9 is loosened. At this time, the fixing ring 9 will move downward and reset under the action of gravity and the force of the spring 12, so that the block 10 is engaged with the slot 11, fixing the rotating shaft 8 and preventing the mounting plate 3 from rotating.

[0026] The positioning assembly includes two grooves 14, both of which are provided at the bottom of the base plate 7, the bottom end of the rotating shaft 8 passes through the base plate 7, and a fixing plate 15 is welded to the bottom position of one side of the rotating shaft 8. A through-type sliding hole is provided at the bottom of the fixing plate 15, and a positioning column 16 is slidably connected in the sliding hole, and the positioning column 16 is plugged into the groove 14. The top of the positioning column 16 is provided with an arc surface 18, and the outer side of the positioning column 16 is provided with an elastic component for supporting the positioning column 16. The elastic component includes a tension spring 17, which is sleeved on the outer side of the positioning column 16. A fixing block is welded to the bottom end of the positioning column 16, and the two ends of the tension spring 17 are respectively fixed to the fixing plate 15 and the fixing block, and the fixing block will be driven during the rotation of the rotating shaft 8. When the fixed plate 15 rotates, the fixed plate 15 will drive the positioning column 16 to rotate. During the rotation process, the positioning column 16 will squeeze the positioning column 16 downward through the arc surface 18 at the top of the positioning column 16, so that the positioning column 16 is disengaged from the groove 14. At the same time, the positioning column 16 will stretch the tension spring 17. When the fixed plate 15 rotates until the positioning column 16 is aligned with the other groove 14, the positioning column 16 will be reset and inserted into the other groove 14 by the force of the tension spring 17. At this time, the two mounting plates 3 will complete the transposition, thereby positioning the rotation angle of the rotating shaft 8, which is convenient for the staff to accurately transpose the two mounting plates 3. A plurality of feet for supporting the bottom of the bottom plate 7 are welded to the bottom of the bottom plate 7.

[0027] Working principle: When it is needed, the measured rotating motor is respectively installed on the two mounting plates 3 by means of bolts 2, and the output shaft of the measured rotating motor is inserted into the placement slot 20 on the connecting shaft 4 through the mounting plate 3, and the output shaft of the measured rotating motor is key-connected with the connecting shaft 4 through the key bar. Then the measured encoder is installed on the top of the measured rotating motor by means of bolts 2. At this time, the protrusion 19 at the bottom of the connecting shaft 4 is located in the arc groove 6 on the rotating output shaft of the active rotating mechanism 5, so that the active rotating mechanism 5 drives the connecting shaft 4 to rotate through the protrusion 19, and the connecting shaft 4 drives the output shaft of the measured rotating motor to rotate, so as to complete the calibration of the measured encoder. After the calibration is completed, pull the fixing ring 9 Move upward to disengage the card block 10 from the card slot 11. At this time, rotate the rotating shaft 8, the rotating shaft 8 will drive the connecting block 1 to rotate, and the connecting block 1 will drive the two mounting plates 3 to rotate, so that the two mounting plates 3 are swapped, so that the protrusion 19 on the other connecting shaft 4 enters the arc groove 6, and then loosen the fixing ring 9. The fixing ring 9 moves downward and resets under the action of gravity, so that the card block 10 is engaged with the card slot 11, fixing the rotating shaft 8 to prevent the mounting plate 3 from rotating. Then calibrate the other encoder, and then remove the calibrated encoder and install a new encoder. This cycle can be repeated, so that the encoder can be calibrated continuously, saving time and improving work efficiency.

[0028] The present invention has been described through the above embodiments. Those skilled in the art will understand that the present invention is not limited to the above embodiments, and more modifications can be made according to the teachings of the present invention. These modifications all fall within the scope of protection required by the present invention. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. A calibration device for an encoder, comprising a base plate (7) and an active rotating mechanism (5), wherein the active rotating mechanism (5) is mounted on the base plate (7) and its own rotation output end is vertically arranged, characterized in that: The upper surface of the base plate (7) is rotatably connected to a rotating shaft (8), and the upper surface of the base plate (7) is provided with a locking assembly for fixing the rotating shaft (8). The top of the rotating shaft (8) is fixedly connected to a connecting block (1), and both sides of the connecting block (1) are fixedly connected to a mounting plate (3). The upper surface of the mounting plate (3) is provided with a plurality of bolts (2) for fixing the encoder to be measured. The bottom of the mounting plate (3) is rotatably connected to a connecting shaft (4), and a placement groove (20) is provided at the top of the connecting shaft (4). The bottom end of the connecting shaft (4) is fixedly connected to a protrusion (19). The top end of the rotating output shaft of the active rotating mechanism (5) is provided with a through-type arc groove (6), and the protrusion (19) is plugged into the arc groove (6). The bottom of the base plate (7) is provided with a positioning assembly for positioning the rotation angle of the rotating shaft (8).

2. The encoder calibration device according to claim 1, characterized in that: The locking assembly comprises a fixing ring (9), the fixing ring (9) being arranged on the top of the base plate (7), the rotating shaft (8) passing through the fixing ring (9), a plurality of slots (11) being provided on the circumferential inner wall of the fixing ring (9), a clamping block (10) adapted to the slots (11) being fixedly connected to the outer side of the rotating shaft (8), and the clamping block (10) being clamped to the slots (11).

3. The encoder calibration device according to claim 2, characterized in that: The outer circumferential wall of the fixing ring (9) is symmetrically fixedly connected to two connecting plates, and the top of the bottom plate (7) is fixedly connected to two guide rods (13). The two guide rods (13) pass through the two connecting plates respectively, so that the fixing ring (9) moves vertically.

4. The encoder calibration device according to claim 3, characterized in that: The top ends of the two guide rods (13) are fixedly connected with a baffle, the outer sides of the two guide rods (13) are sleeved with a spring (12), and the two ends of the spring (12) are respectively fixed with the connecting plate and the baffle.

5. The encoder calibration device according to claim 1, characterized in that: The positioning component includes two grooves (14), both of which are opened at the bottom of the base plate (7), the bottom end of the rotating shaft (8) passes through the base plate (7), and one side of the rotating shaft (8) is fixedly connected to a fixed plate (15) at the bottom position, and a through-type sliding hole is opened at the bottom of the fixed plate (15), and a positioning column (16) is slidably connected in the sliding hole, and the positioning column (16) is plugged into the groove (14), the top of the positioning column (16) is provided with an arc surface (18), and the outer side of the positioning column (16) is provided with an elastic component for supporting the positioning column (16).

6. The encoder calibration device according to claim 5, characterized in that: The elastic component includes a tension spring (17), which is sleeved on the outside of the positioning column (16). The bottom end of the positioning column (16) is fixedly connected to a fixed block, and the two ends of the tension spring (17) are respectively fixed to the fixed plate (15) and the fixed block.

7. The encoder calibration device according to claim 1, characterized in that: The bottom of the base plate (7) is fixedly connected to a plurality of feet for supporting the base plate (7).

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