A novel multi-turn absolute encoder

Abstract

This utility model discloses a novel multi-turn absolute encoder, relating to the field of absolute encoder technology. It includes a base with a top cover. A transmission assembly is located inside the base and top cover. The transmission assembly includes a mounting slot located at the bottom of the inner wall of the base. Three first gears are rotatably connected in a circular array inside the base and top cover. Second gears are fixedly connected to the bottom of each of the three first gears. This novel multi-turn absolute encoder, through its transmission assembly, achieves multi-stage deceleration and transmission of the input shaft's rotational motion, ensuring the stability of the number of turns memory and the compactness of the mechanical structure. It provides a reliable mechanical foundation for subsequent absolute position detection. It does not require battery power and features position information retention even when power is lost, mechanical memory, strong anti-interference capability, and shock and dust resistance.

Description

Technical Field

[0001] This utility model relates to the field of absolute encoder technology, and in particular to a novel multi-turn absolute encoder. Background Technology

[0002] In the fields of industrial automation and actuator control, encoders are key position detection components, and their accuracy and reliability directly affect system performance.

[0003] Traditional incremental encoders cannot remember their position after a power outage and rely on batteries to maintain their memory. While absolute encoders can remember their position, most can only record the position of a single revolution, which cannot meet the application requirements of multi-revolution rotating equipment.

[0004] Existing technologies include some multi-turn absolute encoders, but they mostly use gear mechanical counting or battery-powered memory methods, which have disadvantages such as complex structure, short lifespan, weak anti-interference ability, and narrow applicable temperature range. To address these issues, we propose a novel multi-turn absolute encoder. Utility Model Content

[0005] This utility model discloses a novel multi-turn absolute encoder, which aims to solve the technical problems of complex structure, short life, weak anti-interference ability and narrow applicable temperature range that exist in the use of gear mechanical counting or battery-powered memory methods.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] A novel multi-turn absolute encoder includes a base with a top cover. A transmission assembly is located inside the base and top cover. The transmission assembly includes a mounting slot located at the bottom of the inner wall of the base. Three first gears are rotatably connected in a circular array inside the base and top cover. Second gears are fixedly connected to the bottom of each of the three first gears. Three third gears are rotatably connected in a circular array inside the base and top cover, below the first gears. Transmission gears are fixedly connected to the top of each of the three third gears, and these transmission gears mesh with the first gears. A linkage gear is symmetrically rotatably connected inside the base and top cover, below the first gears, and this linkage gear meshes with the second gear. A conductive element is installed inside the mounting slot, and a drive gear is fixedly connected to the top of the conductive element. This drive gear meshes with one of the third gears.

[0008] The transmission components enable multi-stage deceleration and transmission of the input shaft's rotational motion, ensuring the stability of the rotation count memory and the compactness of the mechanical structure. This provides a reliable mechanical foundation for subsequent absolute position detection. It does not require battery power, features position information retention even when power is off, mechanical memory, strong anti-interference capabilities, and is shockproof and dustproof.

[0009] In a preferred embodiment, the conductive element is a code disk made of magnetic material, and a magnetic sensor is correspondingly provided in the mounting slot to detect the absolute angle of a single turn of the conductive element; photoelectric encoder disks are installed on the shaft of the first gear, and photoelectric reading heads are correspondingly provided in the base and top cover to detect the position of multiple turns of the photoelectric encoder disk.

[0010] Using a magnetic encoder as a conductive element and a magnetic sensor to detect the angle of a single turn, it has the advantages of anti-interference and long lifespan. By installing a photoelectric encoder on the shaft of the first gear and using a photoelectric reading head to detect the number of turns, non-contact measurement is achieved, avoiding mechanical wear and ensuring high accuracy and high reliability of position information detection.

[0011] In a preferred embodiment, both the magnetic sensor and the photoelectric reading head are connected to a signal processing circuit board. The circuit board is used to synthesize the single-turn angle signal and the multi-turn number signal into absolute position data, and output it through a communication interface that supports SSI, UART and RS-485 communication protocols.

[0012] The signals from the magnetic sensor and photoelectric readout head are combined and processed by the signal processing circuit board to generate complete absolute position data, resulting in a high degree of integration. The communication interface supports multiple industrial standard protocols such as SSI, UART, and RS-485, enhancing the device's versatility and compatibility, and facilitating connection with different master control systems.

[0013] In a preferred embodiment, the gear ratios of each gear in the transmission assembly are configured as follows: the transmission ratio between the driving gear and the third gear is 1:4, the transmission ratio between the transmission gear and the first gear is 1:4, and the transmission ratio between the linkage gear and the second gear is 1:1, so that the total reduction ratio of the entire gear system is 4096:1.

[0014] The entire gear system ultimately achieved a total reduction ratio of 4096:1, thus accurately converting the 4096 rotations of the input shaft into less than one rotation of the count encoder, ensuring the realization of a multi-revolution memory range and the uniqueness of the data.

[0015] In a preferred embodiment, partition plates are symmetrically installed inside the base and the top cover, and clearance holes are provided inside both partition plates. A wire through hole is provided on one side of the top of the top cover, through which the core cable is led out.

[0016] The symmetrically installed partitions inside serve to support and isolate the internal components. The clearance holes on them, together with the wiring holes on the top cover, provide a neat routing path for the core cables. This not only protects the cables from interference from internal moving parts, but also makes the overall structure cleaner, easier to seal and install, and improves the product's protection level and reliability.

[0017] In a preferred embodiment, the top of the top cover has a sticker slot for attaching information, and the outer side of the base has mounting holes arranged in a circular array for mounting and fixing.

[0018] The sticker slot on the top cover facilitates the application of identification stickers containing information such as model number and address, simplifying equipment management and maintenance. The mounting holes arranged in a circular array on the outer side of the base provide multiple flexible installation options, enabling the encoder to adapt to various complex installation environments and space requirements, thus enhancing the product's engineering applicability.

[0019] The novel multi-turn absolute encoder provided by this utility model has the following advantages:

[0020] Firstly, the transmission components enable multi-stage deceleration and transmission of the input shaft's rotational motion, ensuring the stability of the rotation count memory and the compactness of the mechanical structure. This provides a reliable mechanical foundation for subsequent absolute position detection. It does not require battery power, and features position information retention even when power is lost, mechanical memory, strong anti-interference capabilities, and shock and dust resistance.

[0021] Secondly, the symmetrically installed internal partitions support and isolate the internal components. The clearance holes on these partitions, together with the wiring holes on the top cover, provide a neat routing path for the core cables. This not only protects the cables from interference from internal moving parts but also makes the overall structure cleaner, facilitating sealing and installation, and improving the product's protection level and reliability. The sticker slots on the top cover allow for easy application of identification stickers containing model number, address, and other information, simplifying equipment management and maintenance. The circular array of mounting holes on the outer side of the base provides multiple flexible installation options, enabling the encoder to adapt to various complex installation environments and space requirements, thus enhancing the product's engineering applicability. Attached Figure Description

[0022] Figure 1 This is a three-dimensional schematic diagram of a novel multi-turn absolute encoder proposed in this utility model.

[0023] Figure 2 This is a three-dimensional schematic diagram of the transmission component of a novel multi-turn absolute encoder proposed in this utility model.

[0024] Figure 3 This is a three-dimensional bottom view of the transmission component of a novel multi-turn absolute encoder proposed in this utility model.

[0025] Figure 4 This is a three-dimensional exploded view of a novel multi-turn absolute encoder proposed in this utility model.

[0026] Figure 5 This is an exploded view of the transmission component of a novel multi-turn absolute encoder proposed in this utility model.

[0027] Figure 6 This is a three-dimensional schematic diagram of the top cover of a novel multi-turn absolute encoder proposed in this utility model.

[0028] Figure 7 This is a three-dimensional schematic diagram of the base of a novel multi-turn absolute encoder proposed in this utility model.

[0029] In the attached diagram: 1. Base; 2. Top cover; 3. Mounting slot; 4. Divider plate; 5. Clearance hole; 6. Transmission assembly; 61. Conductor; 62. Gear No. 1; 63. Gear No. 2; 64. Gear No. 3; 65. Drive gear; 66. Linkage gear; 67. Transmission gear; 7. Mounting hole; 8. Threading hole; 9. Sticker slot. Detailed Implementation

[0030] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. The components of the embodiments of this application described and marked in the accompanying drawings can be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of this application provided in the accompanying drawings is not intended to limit the scope of the claimed application, but merely represents selected embodiments of this application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without inventive effort are within the scope of protection of this application.

[0031] The novel multi-turn absolute encoder disclosed in this utility model is mainly applied to absolute encoder scenarios.

[0032] Reference Figure 1 - Figure 7A novel multi-turn absolute encoder includes a base 1, a top cover 2 on the top of the base 1, and a transmission assembly 6 inside the base 1 and the top cover 2. The transmission assembly 6 includes a mounting slot 3 located at the bottom of the inner wall of the base 1. Three first gears 62 are rotatably connected in a circular array inside the base 1 and the top cover 2. A second gear 63 is fixedly connected to the bottom of each of the three first gears 62. Three third gears 64 are rotatably connected in a circular array inside the base 1 and the top cover 2, below the first gears 62. A transmission gear 67 is fixedly connected to the top of each of the three third gears 64. The transmission gears 67 are meshed with the first gears 62. A linkage gear 66 is symmetrically rotatably connected inside the base 1 and the top cover 2, below the first gears 62. The linkage gear 66 is meshed with the second gear 63. A conductor 61 is installed inside the mounting slot 3. A drive gear 65 is fixedly connected to the top of the conductor 61. The drive gear 65 is meshed with one of the third gears 64. The transmission component 61 is a code disk made of magnetic material. A magnetic sensor is correspondingly installed in the mounting slot 3 to detect the absolute angle of a single turn of the transmission component 61. A photoelectric encoder disk is mounted on the shaft of the first gear 62. Photoelectric reading heads are correspondingly installed in the base 1 and top cover 2 to detect the multi-turn position of the photoelectric encoder disk. Both the magnetic sensor and the photoelectric reading head are connected to a signal processing circuit board. The circuit board synthesizes the single-turn angle signal and the multi-turn signal into absolute position data and outputs it through a communication interface that supports SSI, UART, and RS-485 communication protocols. The gear ratios of the gears in the transmission assembly 6 are configured as follows: the transmission ratio between the driving gear 65 and the third gear 64 is 1:4; the transmission ratio between the transmission gear 67 and the first gear 62 is 1:4; and the transmission ratio between the linkage gear 66 and the second gear 63 is 1:1, resulting in a total reduction ratio of 4096:1 for the entire gear system.

[0033] In this embodiment: the rotational motion of the shaft drives the drive gear 65 to rotate via the transmission component 61. The drive gear 65 drives the meshing third gear 64, thereby transmitting the motion to the transmission gear 67. The transmission gear 67 drives the meshing first gear 62 to rotate, achieving the first stage of deceleration. The second gear 63, fixed to the bottom of the first gear 62, transmits the motion to the next second gear 63 via the meshing linkage gear 66, thus realizing the linkage and speed transmission between the three first gears 62, completing multi-stage deceleration. The magnetic sensor detects the rotation angle of the transmission component 61 in real time to obtain a high-resolution single-turn absolute position signal. Through the set transmission component 6, multi-stage deceleration and transmission of the input shaft rotational motion are realized, ensuring the stability of the number of turns memory and the compactness of the mechanical structure. This provides a reliable mechanical foundation for subsequent absolute position detection. It does not require battery power and features position information not lost when power is off, mechanical memory, strong anti-interference ability, shock resistance, and dustproof characteristics.

[0034] The above technical solutions suffer from drawbacks such as complex structure, short lifespan, weak anti-interference ability, and narrow applicable temperature range when using gear-based mechanical counting or battery-powered memory methods. To address these issues, the specific operation is as follows:

[0035] Reference Figure 1 - Figure 7 In a preferred embodiment, partition plates 4 are symmetrically installed inside the base 1 and the top cover 2. Both partition plates 4 have clearance holes 5 inside. A wire hole 8 is provided on one side of the top of the top cover 2, through which a 5-core ribbon cable is led out. A sticker slot 9 for attaching information is provided on the top of the top cover 2, and mounting holes 7 for installation and fixing are arranged in a circular array on the outer side of the base 1.

[0036] In this embodiment, the symmetrically installed internal partition plate 4 serves to support and isolate the internal components. Its clearance holes 5, together with the wiring holes 8 on the top cover 2, provide a neat routing path for the 5-core ribbon cable. This not only protects the cable from interference from internal moving parts but also makes the overall structure cleaner, facilitating sealing and installation, and improving the product's protection level and reliability. The sticker slot 9 on the top cover 2 facilitates the affixing of identification stickers containing information such as model number and address, simplifying equipment management and maintenance. The mounting holes 7 in the outer circumferential array on the base 1 provide various flexible installation methods, enabling the encoder to adapt to various complex installation environments and space requirements, thus improving the product's engineering applicability.

[0037] Working principle: The rotational motion of the shaft drives the drive gear 65 to rotate via the transmission component 61. The drive gear 65 drives the meshing third gear 64, thereby transmitting the motion to the transmission gear 67. The transmission gear 67 drives the meshing first gear 62 to rotate, achieving the first stage of deceleration. The second gear 63, fixed to the bottom of the first gear 62, transmits the motion to the next second gear 63 through the meshing linkage gear 66, thus realizing the linkage and speed transmission among the three first gears 62, completing multi-stage deceleration. The magnetic sensor detects the rotation angle of the transmission component 61 in real time, obtaining a high-resolution single-turn absolute position signal. Simultaneously, the photoelectric encoder disk mounted on the shaft of the first gear 62 converts its rotation count into a photoelectric signal, which is read by the photoelectric reading head to obtain multi-turn information. The signal processing circuit board receives and processes these two signals, combines them into a data packet representing the total absolute position, and finally outputs it to the upper control system through the communication interface.

[0038] The above description is merely a preferred embodiment of this utility model, but the protection scope of this utility model is not limited thereto. The substitutions may be replacements of some structures, devices, or method steps, or they may be complete technical solutions. Equivalent substitutions or modifications made based on the technical solution and inventive concept of this utility model should all be covered within the protection scope of this utility model.

Claims

1. A novel multi-turn absolute encoder, comprising a base (1), characterized in that: The base (1) is provided with a top cover (2) on its top, and a transmission assembly (6) is provided inside the base (1) and the top cover (2). The transmission assembly (6) includes a mounting slot (3) located at the bottom of the inner wall of the base (1). Three first gears (62) are rotatably connected in a circular array inside the base (1) and the top cover (2). The bottom of each of the three first gears (62) is fixedly connected to a second gear (63). Three third gears (64) are rotatably connected in a circular array inside the base (1) and the top cover (2) and below the first gears (62). The top of each of the three third gears (64) is fixedly connected to a transmission gear. (67) The transmission gear (67) and the first gear (62) are meshed together. The base (1) and the top cover (2) are symmetrically connected to the linkage gear (66) below the first gear (62). The linkage gear (66) is meshed with the second gear (63). The mounting slot (3) is equipped with a guide (61). The top of the guide (61) is fixedly connected to the drive gear (65). The drive gear (65) is meshed with one of the third gears (64).

2. The novel multi-turn absolute encoder according to claim 1, characterized in that: The conductive element (61) is a code disk made of magnetic material. A magnetic sensor is correspondingly provided in the mounting slot (3) to detect the absolute angle of a single turn of the conductive element (61). A photoelectric encoder disk is installed on the shaft of the first gear (62). A photoelectric reading head is correspondingly provided in the base (1) and the top cover (2) to detect the position of the number of turns of the photoelectric encoder disk.

3. A novel multi-turn absolute encoder according to claim 2, characterized in that: Both the magnetic sensor and the photoelectric reading head are connected to a signal processing circuit board. The circuit board is used to synthesize the single-turn angle signal and the multi-turn number signal into absolute position data and output it through a communication interface. The communication interface supports SSI, UART and RS-485 communication protocols.

4. A novel multi-turn absolute encoder according to claim 1, characterized in that: The gear ratios of each gear in the transmission assembly (6) are configured as follows: the transmission ratio between the driving gear (65) and the third gear (64) is 1:4, the transmission ratio between the transmission gear (67) and the first gear (62) is 1:4, and the transmission ratio between the linkage gear (66) and the second gear (63) is 1:1, so that the total reduction ratio of the entire gear system is 4096:

1.

5. A novel multi-turn absolute encoder according to claim 1, characterized in that: The base (1) and the top cover (2) are symmetrically equipped with partition plates (4), and both partition plates (4) are provided with clearance holes (5). The top of the top cover (2) is provided with a wire hole (8), through which a 5-core ribbon cable is led out.

6. A novel multi-turn absolute encoder according to claim 1, characterized in that: The top of the top cover (2) is provided with a sticker slot (9) for posting information, and the outer side of the base (1) is provided with mounting holes (7) arranged in a circumferential array for installation and fixing.

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