Composite high-precision absolute value encoder

Abstract

The utility model relates to the technical field of encoders, in particular to a combined type high-precision absolute value encoder, which comprises an encoder body and a driving motor, a rotating shaft is movably mounted in the encoder body, the rotating shaft is divided into two sections, a universal joint is mounted between the two sections of rotating shaft, and an output shaft is fixedly mounted at the output end of the driving motor. A connecting assembly is mounted between the output shaft and the rotating shaft; the connecting assembly comprises a connecting seat, a plurality of conical blocks, a rotating sleeve and an inner inclined surface, the connecting seat is fixedly connected to one end, far away from the encoder body, of the rotating shaft, and the conical blocks are movably mounted at one end of the rotating shaft of the connecting seat and are annularly distributed. According to the utility model, reliable connection with the output shaft of the motor is realized through the connecting assembly, and the universal joint is used to adapt to different installation angles to ensure synchronous rotation, so that the problems that the existing encoder is inconvenient to connect and the precision is easily influenced are solved, and the encoder performance and the equipment operation stability are improved.

Description

Technical Field

[0001] This utility model relates to the field of encoders, and in particular to a composite high-precision absolute encoder. Background Technology

[0002] With the continuous development of society, encoders, as precision devices that convert mechanical motion into electrical signals, play a vital role in many fields such as industrial automation, robot control, and CNC machine tools. In industrial automated production lines, encoders can accurately measure the speed, position, and angle of motors, providing real-time feedback to the control system, ensuring that the equipment operates accurately according to the preset program, and effectively improving production efficiency and product quality.

[0003] Chinese utility model patent CN203069198U discloses a composite encoder, relating to the field of encoder technology. Its flange mounting base is connected to a protective shell, with two mounting posts respectively installed on the flange mounting base, both inside the protective shell. A connecting lubrication device is installed in the central hole of the flange mounting base. One end of a rotating shaft and a connecting shaft are respectively mounted on the connecting lubrication device. A first data processor and a second data processor are respectively mounted on the mounting posts, and a first receiving device and a second receiving device are respectively installed between the first and second data processors. Through holes are provided on the rotating shafts corresponding to the first and second data processors, and a first transmitting device and a second transmitting device are respectively installed in the through holes. A microprocessor is installed at the ends of the two mounting posts. This design saves space, making the structure more compact, reducing volume, and offering ease of use and high reliability.

[0004] However, when the aforementioned patent is used, it cannot guarantee a reliable connection between the encoder and the motor output shaft when the encoder needs to be connected to the motor output shaft. An unstable connection will cause relative displacement or loosening between the encoder and the motor output shaft during motor operation. This will directly affect the encoder's accurate measurement of motor motion parameters, reduce measurement accuracy, and consequently affect the overall operating accuracy and stability of the equipment. Utility Model Content

[0005] In view of this, the present invention provides a composite high-precision absolute encoder, the main technical problem to be solved is: to solve the problem of troublesome connection between the encoder and the motor output shaft and the problem of reduced accuracy due to unreliable connection.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: a composite high-precision absolute encoder, comprising an encoder body and a drive motor, wherein a rotating shaft is movably mounted inside the encoder body, the rotating shaft has two sections, a universal joint is installed between the two sections of the rotating shaft, an output shaft is fixedly mounted at the output end of the drive motor, and a connecting component is installed between the output shaft and the rotating shaft;

[0007] The connecting assembly includes a connecting seat, a conical block, a rotating sleeve, and an inner inclined surface. The connecting seat is fixedly connected to the end of the rotating shaft away from the encoder body. The conical block is movably installed at one end of the rotating shaft of the connecting seat. There are multiple conical blocks arranged in a ring. The output shaft is located on the inner wall of the multiple conical blocks. The rotating sleeve is threaded onto the outer wall of the multiple conical blocks. The inner inclined surface is formed on the inner wall of the rotating sleeve and fits against the outer wall of the conical block.

[0008] By adopting the above technical solution, the rotating sleeve is rotated, and its threaded connection with the conical block causes the inner inclined surface to push the conical block inward to contract, thereby tightly holding the output shaft and fixing the output shaft.

[0009] As a further description of the above technical solution: the connecting assembly also includes a mounting base and a movable shaft. The mounting base is fixedly connected to the end of the connecting base away from the rotation axis. There are multiple mounting bases arranged in a ring. The movable shaft is fixedly connected to the outer wall of the conical block. The conical block is movably installed inside the mounting base through the movable shaft.

[0010] By adopting the above technical solution, the mounting base and movable shaft provide movable support for the conical block, ensuring that the conical block can move stably during contraction and expansion, and improving the reliability of the connection.

[0011] As a further description of the above technical solution: the outer wall of the conical block is provided with external threads, the inner wall of the inner inclined surface is provided with internal threads, and the conical block and the inner inclined surface are connected by threads.

[0012] By adopting the above technical solution, the threaded connection method makes the fit between the rotating sleeve and the conical block tighter, and generates a greater clamping force when tightening the rotating sleeve.

[0013] As a further description of the above technical solution: the universal joint includes a first mounting block, a movable arc groove, and a movable ball. There are two first mounting blocks, and each of the two rotating shafts is fixedly connected to a first mounting block. The movable arc groove is formed inside the first mounting block, and the movable ball is movably mounted inside the two movable arc grooves.

[0014] By adopting the above technical solution, when the encoder body and the motor are not installed in a horizontal position, the movable ball rolls in the movable arc groove, allowing a certain angular deviation between the two rotating shafts, so that the rotating shaft and the output shaft can rotate synchronously.

[0015] As a further description of the above technical solution: a code disk is movably installed inside the encoder body, the code disk is fixedly connected to the outer wall of the rotating shaft, multiple light-emitting diodes are fixedly installed inside the encoder body and located at the bottom of the code disk, and multiple photoelectric sensors are fixedly installed inside the encoder body and located at the top of the code disk.

[0016] By adopting the above technical solution, the light emitted by the light-emitting diode passes through the code disk, and the photoelectric sensor detects the rotation of the code disk based on the change in the received light, thereby realizing the accurate measurement of the position and angle of the rotating axis.

[0017] As a further description of the above technical solution: the code disk includes striped grooves and binary encoding grooves. The striped grooves are formed inside the code disk, and there are multiple striped grooves distributed in a ring. The binary encoding grooves are formed inside the code disk, and there are multiple binary encoding grooves arranged in a concentric ring-shaped hierarchy according to binary encoding rules.

[0018] By adopting the above technical solution, the stripe groove and the binary encoding groove work together to encode the position and angle of the rotating axis more accurately using binary encoding rules.

[0019] As a further description of the above technical solution: the plurality of light-emitting diodes correspond to the bottom positions of the stripe groove and the binary encoding groove, and the plurality of photoelectric sensors correspond to the top positions of the stripe groove and the binary encoding groove.

[0020] By adopting the above technical solution, it is ensured that the light emitted by the light-emitting diode can accurately pass through the stripe grooves and binary encoding grooves of the code disk and be received by the corresponding photoelectric sensor.

[0021] As a further description of the above technical solution: the code disk has an internal mounting groove, and the rotating shaft is fixedly installed inside the mounting groove.

[0022] By adopting the above technical solution, the mounting groove provides a stable connection between the rotating shaft and the code disk, ensuring that the code disk can rotate synchronously with the rotating shaft.

[0023] By employing the above technical solution, the composite high-precision absolute encoder of this utility model has at least the following beneficial effects:

[0024] 1. Compared with existing technologies, this composite high-precision absolute encoder, through the setting of connecting components, allows for the rotation of the rotating sleeve during use, causing the inner inclined surface to push multiple conical blocks inward to tightly hold the output shaft, thereby fixing the output shaft. This makes the connection operation simple and convenient, and the connection is firm and reliable, effectively avoiding the problem of reduced accuracy caused by loose connections, improving the accuracy of encoder measurements, and ensuring the stable operation of the equipment.

[0025] 2. Compared with existing technologies, this composite high-precision absolute encoder, by setting a universal joint, allows the movable ball to roll in the movable arc groove when the encoder body and the motor are not installed in a horizontal position. This allows for a certain angular deviation between the two rotating shafts, enabling the rotating shaft and the output shaft to rotate synchronously. This improves the flexibility of encoder installation, adapts to different installation environments, ensures stable measurement of motor motion parameters under various working conditions, and enhances the applicability of the equipment. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of the overall structure of a composite high-precision absolute encoder proposed in this utility model;

[0027] Figure 2 This is a cross-sectional structural diagram of a composite high-precision absolute encoder proposed in this utility model.

[0028] Figure 3 for Figure 2 Enlarged structural diagram at point A in the middle;

[0029] Figure 4 for Figure 2 Enlarged structural diagram at point B;

[0030] Figure 5 for Figure 2 Enlarged structural diagram at point C;

[0031] Figure 6 This is an enlarged structural diagram of the code disk in a composite high-precision absolute encoder proposed in this utility model.

[0032] Legend:

[0033] 1. Encoder body; 2. Rotary shaft; 3. Universal joint; 301. First mounting block; 302. Movable arc groove; 303. Movable ball; 4. Drive motor; 5. Output shaft; 6. Connecting assembly; 601. Connecting seat; 602. Mounting seat; 603. Conical block; 604. Movable shaft; 605. Rotating sleeve; 606. Inner inclined surface; 7. Code disk; 701. Striped groove; 702. Binary encoding groove; 703. Mounting groove; 8. Light-emitting diode; 9. Photoelectric sensor. Detailed Implementation

[0034] Reference Figure 1-6This utility model provides a composite high-precision absolute encoder, comprising an encoder body 1 and a drive motor 4. A rotating shaft 2 is movably mounted inside the encoder body 1. The rotating shaft 2 has two sections, and a universal joint 3 is installed between the two sections. The universal joint 3 connects the two sections of the rotating shaft 2, allowing them to rotate synchronously at different angles and adapt to different installation environments. An output shaft 5 is fixedly mounted at the output end of the drive motor 4, transmitting the power of the drive motor 4 to the encoder's rotating shaft 2. A connecting assembly 6 is installed between the output shaft 5 and the rotating shaft 2, securely connecting the output shaft 5 and the rotating shaft 2 to ensure stable power transmission and accurate measurement. The connecting assembly 6 includes a connecting seat 601, a tapered block 603, a rotating sleeve 605, and an inner inclined surface 606. The connecting seat 601 is fixed... A fixed connection is made at the end of the rotating shaft 2 away from the encoder body 1. A tapered block 603 is movably mounted at one end of the rotating shaft 2 of the connecting seat 601. Multiple tapered blocks 603 are arranged in a ring, which can clamp the output shaft 5 from multiple directions, enhancing the reliability of the connection. The output shaft 5 is located on the inner wall of the multiple tapered blocks 603. A rotating sleeve 605 is threaded onto the outer wall of the multiple tapered blocks 603. By rotating the rotating sleeve 605, the clamping degree of the tapered blocks 603 can be adjusted. An inner inclined surface 606 is formed on the inner wall of the rotating sleeve 605 and fits against the outer wall of the tapered blocks 603. When the rotating sleeve 605 rotates, the inner inclined surface 606 pushes the tapered blocks 603 to move, realizing the operation of clamping or loosening the output shaft 5.

[0035] The connecting assembly 6 also includes a mounting base 602 and a movable shaft 604. The mounting base 602 is fixedly connected to the end of the connecting base 601 away from the rotating shaft 2. There are multiple mounting bases 602 arranged in a ring. The mounting base 602 provides movable support for the conical block 603 to ensure the stability of the conical block 603 during movement. The movable shaft 604 is fixedly connected to the outer wall of the conical block 603. The conical block 603 is movably mounted inside the mounting base 602 through the movable shaft 604, which allows the conical block 603 to move flexibly within the mounting base 602.

[0036] The outer wall of the tapered block 603 is provided with external threads, and the inner wall of the inner inclined surface 606 is provided with internal threads. The tapered block 603 and the inner inclined surface 606 are connected by threads. The threaded connection makes the fit between the rotating sleeve 605 and the tapered block 603 tighter. When the rotating sleeve 605 is tightened, a greater clamping force can be generated, which enhances the fixing effect on the output shaft 5.

[0037] The universal joint 3 includes a first mounting block 301, a movable arc groove 302, and a movable ball 303. There are two first mounting blocks 301, and each of the two rotating shafts 2 is fixedly connected to a first mounting block 301. The first mounting block 301 provides a mounting position for the movable arc groove 302 and the movable ball 303. The movable arc groove 302 is opened inside the first mounting block 301 and provides a rolling track for the movable ball 303, so that the two rotating shafts 2 can rotate relative to each other within a certain angle range. The movable ball 303 is movably mounted inside the two movable arc grooves 302 and rolls in the movable arc grooves 302 to realize the synchronous rotation of the rotating shaft 2 and the output shaft 5.

[0038] The encoder body 1 has a code disk 7 movably installed inside. The code disk 7 is fixedly connected to the outer wall of the rotating shaft 2. The code disk 7 rotates synchronously with the rotating shaft 2 and reflects the position and angle information of the rotating shaft 2 through its own structural changes. Multiple light-emitting diodes 8 are fixedly installed inside the encoder body 1 and are located at the bottom of the code disk 7. The light emitted by the light-emitting diodes 8 passes through the code disk 7 to provide a detection signal for the photoelectric sensor 9. Multiple photoelectric sensors 9 are fixedly installed inside the encoder body 1 and are located at the top of the code disk 7. The photoelectric sensor 9 receives the light signal transmitted through the code disk 7 and converts the light signal into an electrical signal for measuring the position and angle of the rotating shaft 2.

[0039] The code disk 7 includes striped grooves 701 and binary encoding grooves 702. The striped grooves 701 are located inside the code disk 7 and are arranged in a ring. The striped grooves 701 and the binary encoding grooves 702 work together to encode the motion information of the rotating shaft 2 by changing the light transmission and light blocking. The binary encoding grooves 702 are located inside the code disk 7 and are arranged in a concentric ring layer according to the binary encoding rules. The binary encoding grooves 702 arranged according to the binary encoding rules can encode the position and angle of the rotating shaft 2 more accurately.

[0040] Multiple light-emitting diodes 8 correspond to the bottom positions of stripe grooves 701 and binary encoding grooves 702, and multiple photoelectric sensors 9 correspond to the top positions of stripe grooves 701 and binary encoding grooves 702. This ensures that the light emitted by the light-emitting diodes 8 can accurately pass through the stripe grooves 701 and binary encoding grooves 702 of the code disk 7 and be received by the corresponding photoelectric sensors 9, thus ensuring the accuracy of the measurement.

[0041] The code disk 7 has an internal mounting groove 703, and the rotating shaft 2 is fixedly installed inside the mounting groove 703. The mounting groove 703 provides a stable connection between the rotating shaft 2 and the code disk 7.

[0042] Working principle: First, the output shaft 5 of the drive motor 4 is inserted into the space enclosed by multiple conical blocks 603. Then, the rotating sleeve 605 is rotated. Since the outer wall of the conical block 603 and the inner inclined surface 606 of the inner wall of the rotating sleeve 605 are connected by threads, when the rotating sleeve 605 rotates, the inner inclined surface 606 will push the conical block 603 to move along the movable shaft 604 in the mounting base 602. The multiple conical blocks 603 contract inward and tightly hold the output shaft 5, thus realizing a firm connection between the encoder rotating shaft 2 and the output shaft 5 of the drive motor 4.

[0043] When the drive motor 4 starts, the output shaft 5 begins to rotate, driving the connected rotating shaft 2 to rotate synchronously. If there is a certain angular deviation between the installation positions of the encoder body 1 and the drive motor 4, the universal joint 3 begins to function. The movable ball 303 between the two rotating shafts 2 rolls in the movable arc groove 302 of the first mounting block 301, allowing a certain angular change between the two rotating shafts 2, ensuring that the rotating shaft 2 can rotate stably with the output shaft 5, and realizing stable power transmission.

[0044] When the rotating shaft 2 rotates, the code disk 7 fixed to its outer wall also rotates. The light-emitting diode 8 inside the encoder body 1 emits light, which passes through the stripe grooves 701 and binary encoding grooves 702 on the code disk 7. The photoelectric sensor 9 located on the top of the code disk 7 receives the light passing through the code disk 7 and converts the light signal into an electrical signal according to the changes in the light. Since the stripe grooves 701 and binary encoding grooves 702 are designed according to specific rules, the signal received by the photoelectric sensor 9, after processing, can accurately calculate the position, angle, and other information of the rotating shaft 2, thereby realizing the accurate measurement of the motion state of the drive motor 4.

[0045] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A combined high-precision absolute value encoder comprising an encoder body (1) and a drive motor (4), characterized in that: The inside of the encoder body (1) is movably provided with a rotating shaft (2), the rotating shaft (2) has two sections, a universal joint (3) is arranged between the two sections of the rotating shaft (2), an output shaft (5) is fixedly arranged at the output end of the driving motor (4), and a connecting assembly (6) is arranged between the output shaft (5) and the rotating shaft (2); The connecting assembly (6) comprises a connecting seat (601), a tapered block (603), a rotating sleeve (605) and an inner inclined surface (606), the connecting seat (601) is fixedly connected to one end of the rotating shaft (2) away from the encoder body (1), the tapered block (603) is movably arranged at one end of the rotating shaft (2) of the connecting seat (601), the tapered block (603) has a plurality of annular distributions, the output shaft (5) is located on the inner wall of the plurality of tapered blocks (603), the rotating sleeve (605) is threadedly arranged on the outer wall of the plurality of tapered blocks (603), and the inner inclined surface (606) is arranged on the inner wall of the rotating sleeve (605). The inner inclined surface (606) is attached to the outer wall of the tapered block (603).

2. A compound high-precision absolute value encoder according to claim 1, characterized in that: The connecting assembly (6) further comprises a mounting seat (602) and a movable shaft (604), the mounting seat (602) is fixedly connected to one end of the connecting seat (601) away from the rotating shaft (2), the mounting seat (602) has a plurality of annular distributions, and the movable shaft (604) is fixedly connected to the outer wall of the tapered block (603). The tapered block (603) is movably arranged in the inside of the mounting seat (602) through the movable shaft (604).

3. The hybrid high-precision absolute value encoder according to claim 1, characterized in that: The outer wall of the tapered block (603) is provided with external threads, the inner wall of the inner inclined surface (606) is provided with internal threads, and the tapered block (603) and the inner inclined surface (606) are connected through threads.

4. The hybrid high-precision absolute value encoder of claim 1, wherein: The universal joint (3) comprises a first mounting block (301), a movable arc groove (302) and a movable rolling ball (303), the first mounting block (301) has two, the first mounting block (301) is fixedly connected between the two sections of the rotating shaft (2), the movable arc groove (302) is arranged in the inside of the first mounting block (301), and the movable rolling ball (303) is movably arranged in the inside of the two movable arc grooves (302).

5. The hybrid high-precision absolute value encoder of claim 1, wherein: The inside of the encoder body (1) is movably provided with a code disc (7), the code disc (7) is fixedly connected to the outer wall of the rotating shaft (2), the inside of the encoder body (1) is fixedly provided with a plurality of light emitting diodes (8), the light emitting diodes (8) are located at the bottom of the code disc (7), and the inside of the encoder body (1) is fixedly provided with a plurality of photoelectric sensors (9). The photoelectric sensors (9) are located at the top of the code disc (7).

6. A compound high-precision absolute value encoder according to claim 5, characterized in that: The code disc (7) comprises a stripe groove (701) and a binary encoding groove (702), the stripe groove (701) is arranged in the inside of the code disc (7), the stripe groove (701) has a plurality of annular distributions, the binary encoding groove (702) is arranged in the inside of the code disc (7), and the binary encoding groove (702) has a plurality of concentric ring layers arranged according to binary encoding rules.

7. A compound high-precision absolute value encoder according to claim 6, characterized in that: A plurality of the light emitting diodes (8) correspond to the bottom positions of the stripe grooves (701) and the binary code grooves (702), and a plurality of the photoelectric sensors (9) correspond to the top positions of the stripe grooves (701) and the binary code grooves (702).

8. A compound high-precision absolute value encoder according to claim 5, characterized in that: An installation groove (703) is arranged in the inside of the code disc (7), and the rotating shaft (2) is fixedly installed in the inside of the installation groove (703).

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