A semi-empty shaft end hoisting embedded locking type photoelectric encoder

Abstract

The utility model relates to the technical field of sensor, specifically relates to a kind of half empty shaft end hoisting embedded locking type photoelectric encoder;The half empty main shaft of the design is closely connected with the combined body by bearing, and cooperates embedded locking sleeve and hoisting fastening screw, realizes the stable and reliable shaft end fixation, even in eccentric stress environment also can keep good operation;Grating disc and half empty main shaft synchronous rotation, through the interaction of parallel light source component and IC array chip on circuit board, accurately convert into electric signal, improve the stability and anti-interference ability of signal;The inner sealing ring and outer sealing ring on the combined body and the cable assembly connected by aviation socket on the shell outside, all adopt sealing design, effectively prevent the invasion of oil dirt, dust and high temperature to internal element, greatly prolong the service life of encoder;In addition, pillar and multiple connecting fastening screws are used as connecting piece, ensure the firm connection between circuit board and combined body.

Description

Technical Field

[0001] This utility model relates to the field of sensor technology, and in particular to a semi-hollow shaft end-mounted embedded locking photoelectric encoder. Background Technology

[0002] As a type of sensor, photoelectric encoders have gradually spread from the defense industry to civilian industries; for example, their application has expanded from artillery fire control systems, spacecraft, and military vehicle radar to CNC machine tools, robots, automated production lines, and motors. In existing technologies, photoelectric encoders mainly employ a structure composed of photoelectric pairs, light-emitting diodes, and photovoltaic cells. Through the photoelectric conversion principle, they achieve the detection of speed and position loops. In conventional solutions, the encoder spindle is a round shaft, connected to the user end via a screw hole on the end face of the main body.

[0003] However, when such encoders are applied to the mechanical motion detection of servo spindles, they face many severe challenges. Such applications are usually installed in high-temperature environments with fine oil mist, and the working environment is extremely harsh. They will be subject to oil mist vaporization and high temperature attack, and the space is small and the installation is inconvenient. In such harsh environments, the service life of ordinary encoders is very short, often only about one year, and they will fail due to oil intrusion and other reasons.

[0004] In summary, existing photoelectric encoders for servo spindle rotational motion detection are structurally and installation-wise ill-suited to new working conditions, resulting in short service life and poor reliability. Utility Model Content

[0005] The purpose of this utility model is to provide a semi-hollow shaft end-mounted embedded locking photoelectric encoder, which aims to solve the technical problems of existing photoelectric encoders in the field of servo spindle rotation motion detection, where the structure and installation method are difficult to adapt to new working conditions, resulting in short service life and poor reliability.

[0006] To achieve the above objectives, this utility model employs a semi-hollow shaft end-mounted embedded locking photoelectric encoder, comprising a combined body, a semi-hollow main shaft, an embedded locking sleeve, a hoisting fastening screw, a bearing, a grating disk, a grating support, a parallel light source assembly, a circuit board, a connector, connecting screws, and a housing. A grating disk is mounted on the outer side of the semi-hollow main shaft via the grating support. The semi-hollow main shaft is rotatably connected to the combined body via a bearing and is located within the combined body. The embedded locking sleeve is mounted on the main shaft via the hoisting fastening screw. The outer end of the main shaft has an angled guide opening that matches the embedded locking sleeve. The parallel light source assembly is mounted on the combined body. The circuit board is mounted on the combined body via a connector and covers the parallel light source assembly. The housing is fixedly connected to the combined body via connecting screws and covers the combined body.

[0007] An inner sealing ring is provided between the shell and the combined body, and an outer sealing ring is provided at the end of the combined body away from the shell.

[0008] The outer side of the housing is provided with a cable assembly via an aviation socket, and the outer side of the housing is also provided with a threaded plug.

[0009] The connector consists of a support column and multiple connecting fastening screws. The support column is located at the three bottom corners of the circuit board via the connecting fastening screws, and the multiple connecting fastening screws are located on the assembled body.

[0010] The circuit board is equipped with electronic circuits. The upper end of the IC array chip D1 is connected to the power supply VCC via a wire. A resistor R2 is connected to the IC array chip D1. The two ends of the IC array chip D1 are connected to the power supply VCC and ground GND via wires, and A, B signals and zero position signal Z are connected via wires.

[0011] This utility model discloses a semi-hollow shaft-end suspended embedded locking photoelectric encoder. The semi-hollow main shaft is tightly connected to the main body via bearings, and with the help of the embedded locking sleeve and suspension fastening screws, a stable and reliable shaft-end fixation is achieved, maintaining good operation even under eccentric stress. The grating disk rotates synchronously with the semi-hollow main shaft, interacting with the IC array chip on the circuit board through the parallel light source assembly, accurately converting the signal into an electrical signal, improving signal stability and anti-interference capability. The inner and outer sealing rings on the main body, as well as the cable assembly connected to the outer side of the housing via an aviation socket, all employ a sealed design, effectively preventing damage to internal components from oil, dust, and high temperatures, greatly extending the encoder's service life. Furthermore, the support column and multiple connecting fastening screws serve as connectors, ensuring a stable connection between the circuit board and the main body, further enhancing the overall structural reliability. Attached Figure Description

[0012] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0013] Figure 1 This is an internal sectional view of the semi-hollow shaft end-mounted embedded locking photoelectric encoder of this utility model.

[0014] Figure 2This is a circuit diagram of the semi-hollow shaft end-mounted embedded locking photoelectric encoder of this utility model.

[0015] Figure 3 This is a structural diagram of the electronic components of the semi-hollow shaft end-mounted embedded locking photoelectric encoder of this utility model.

[0016] 1-Embedded locking sleeve, 2-Half-hollow spindle, 3-Outer sealing ring, 4-Bearing, 5-Assembled body, 6-Inner sealing ring, 7-Connector, 8-Connecting fastening screw, 9-Raster support, 10-Raster disk, 11-Circuit board, 12-Hanging fastening screw, 13-Threaded plug, 14-Housing, 15-Parallel light source assembly, 16-IC array chip, 17-Aviation socket, 18-Connecting screw. Detailed Implementation

[0017] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this utility model, and should not be construed as limiting this utility model.

[0018] Please see Figures 1 to 3 This utility model provides a semi-hollow shaft end-mounted embedded locking photoelectric encoder, including a combined body 5, a semi-hollow main shaft 2, an embedded locking sleeve 1, a hoisting fastening screw 12, a bearing 4, a grating disk 10, a grating support 9, a parallel light source assembly 15, a circuit board 11, a connector 7, a connecting screw 18, and a housing 14. The grating disk 10 is mounted on the outer side of the semi-hollow main shaft 2 via the grating support 9. The semi-hollow main shaft 2 is rotatably connected to the combined body 5 via the bearing 4 and is located within the combined body 5. The embedded locking sleeve 1 is mounted on the main shaft via the hoisting fastening screw 12. The outer end of the main shaft has an angled guide opening that matches the embedded locking sleeve 1. The parallel light source assembly 15 is mounted on the combined body 5. The circuit board 11 is mounted on the combined body 5 via the connector 7 and covers the parallel light source assembly 15. The housing 14 is fixedly connected to the combined body 5 via the connecting screw 18 and covers the combined body 5.

[0019] In this embodiment, the housing 14 and the combined body 5 are detachably connected, which facilitates the internal maintenance of the structure.

[0020] In this embodiment, the semi-hollow spindle 2 and the combined body 5 are rotatably connected by bearings 4, and the shaft end is securely fixed by the embedded locking sleeve 1 and the hoisting fastening screws 12, effectively solving the problem of poor adaptability of traditional encoders under eccentric force environments. The grating disk 10 rotates synchronously with the semi-hollow spindle 2 through the grating support 9, and together with the parallel light source assembly 15 and the chip assembly on the circuit board 11, the mechanical motion is accurately converted into electrical signals, improving signal stability and anti-interference ability. The housing 14 is fixed to the combined body 5 by connecting screws 18 to form a closed structure. With its compact internal layout, it significantly improves the reliability and service life of the encoder in harsh environments.

[0021] Furthermore, an inner sealing ring 6 is provided between the housing 14 and the combined body 5, and an outer sealing ring 3 is provided at the end of the combined body 5 away from the housing 14.

[0022] In this embodiment, the inner sealing ring 6 and the outer sealing ring 3 effectively prevent oil, dust and high-temperature gas from entering through the connection gap between the housing 14 and the combined body 5, avoiding performance degradation of internal electronic components due to contamination or overheating, and significantly improving the protection level and service life of the encoder in harsh industrial environments such as humidity, high temperature and dust.

[0023] Furthermore, a cable assembly is provided on the outer side of the housing 14 via an aviation socket 17, and a threaded plug 13 is also provided on the outer side of the housing 14.

[0024] In this embodiment, the threaded plug 13 can be opened during installation to adjust the lifting screws, and tightened after installation to seal and prevent impurities from entering. It also facilitates maintenance and further improves the encoder's environmental adaptability and ease of operation.

[0025] Furthermore, the connector 7 consists of a support column and multiple connecting fastening screws 8. The support column is located at the three bottom corners of the circuit board 11 via the connecting fastening screws 8, and the multiple connecting fastening screws 8 are all located on the combined body 5.

[0026] In this embodiment, by fixing the circuit board 11 to the assembly body 5, the loosening or deformation of the circuit board 11 caused by vibration or impact is avoided; the symmetrical layout of the three bottom corners ensures the uniformity of the force on the circuit board 11.

[0027] Furthermore, the circuit board 11 is equipped with electronic circuits. In the connection of the electronic circuit components, the upper end of the D1 of the IC array chip 16 is connected to the resistor R1 and then to the power supply VCC through the wire. The resistor R2 is connected to the D1 of the IC array chip 16. The two ends of the D1 of the IC array chip 16 are respectively connected to the power supply VCC and ground GND through the wire, and are connected to the A, B signals and the zero position signal Z through the wire.

[0028] In this embodiment, the signal of the grating disk 10 is directly processed by the built-in amplification and shaping circuit through the D1 of the IC array chip 16, eliminating the problems of weak signal, large dispersion and susceptibility to interference in the traditional phototube scheme; the connection of resistors R1 and R2 with power supply VCC and GND optimizes the chip's working state, ensuring that the output A and B signals and zero position signal Z are stable and reliable, with strong load capacity, significantly improving the encoder's positioning accuracy and anti-interference performance.

[0029] In this utility model, the structure of this design is simple, compact, and reasonable. The user end is fixed by screws and the servo groove of the combined body 5, forming a tight connection adapted to the end face of the servo spindle. The spindle, the embedded locking sleeve 1, and the hoisting fastening screw 12 are connected to the user's rotating motion shaft end. The structure of the bearing 4 is suitable for the user's eccentric force environment. The aviation socket 17 is suitable for the user's oil mist vaporization and high temperature harsh environment. In this way, the technical problems of the existing photoelectric encoder servo spindle motion detection, such as its structure and installation method being difficult to adapt to new working conditions, and having short service life and poor reliability, are solved.

[0030] In this invention, the use of a parallel light array chip for data reading further improves the encoder's positioning accuracy and operating speed due to the high-quality original signal. The photoelectric sensing reading section utilizes an integrated IC chip with a built-in amplification and shaping circuit, and is bonded to a small circuit board. During encoder operation, the rotating grating disk 10 generates relative motion, producing the original signal which is then amplified and shaped within the chip, resulting in a stable and reliable pulse signal with strong load capacity, thus improving the encoder's reliability and anti-interference performance. This solves the problems of weak, highly discrete, and easily interfered original signals, as well as the complexity of subsequent circuits, inherent in traditional phototube and photovoltaic cell solutions. Since no static grating is required, the parallel light source and internal integrated circuit processing allow for a gap of up to 0.4mm (allowing axial play + / -0.10mm) and radial clearance of + / -0.04mm. This significantly reduces the encoder's requirements for bearings and shafts, greatly improving its overall performance, environmental adaptability, and lifespan. Compared to traditional phototube and photovoltaic cell encoders, the lifespan is increased by approximately 10 times.

[0031] In this utility model, the circuit principle is as follows: The zero-position signal Z and the A and B patterns arranged in a certain pattern on the grating disk 10 are used to form a photocurrent simulating a sine wave through the light-blocking and light-blocking effect of the photoelectric component; after differential comparison, amplification and shaping, and logic circuit processing, the A and B signals and the zero-position signal Z reflecting the position of the rotating shaft of the textile machinery to be detected can be output; the user can use this rectangular wave (sine wave) for processing in subsequent circuits; in the connection of electronic circuit components, the upper end of the integrated module D1 is connected to the resistor R1 and then to the power supply VCC through a wire, the resistor R2 is connected to the integrated module D1, and the two ends of the integrated module D1 are connected to the power supply VCC and ground GND through wires, and the A, B signals and the zero-position signal Z are connected through wires.

[0032] The working principle of this invention is as follows: A grating disk 10 is fixed on the semi-empty main shaft 2. The grating disk 10 has light-transmitting or opaque pattern codes etched by photolithography and arranged according to a certain pattern. When the user servo main shaft rotates, it drives the main shaft to rotate synchronously, and the grating disk 10 also rotates. At this time, the IC array chip 16 and the parallel light source assembly 15 receive the light-transmitting or opaque signals on the grating disk 10 and convert them into electrical signals. Then, through the logic circuit composed of the integrated circuit in the IC array chip 16 and the electronic devices on the circuit board 11, the signals are processed into rectangular waves or sine waves that reflect the codes on the grating disk 10. This signal output contains information about the motion state of the user's textile machinery rotating shaft, completing the conversion from mechanical motion physical quantities (position, speed, acceleration) to electrical quantities.

[0033] The above-disclosed embodiments are merely preferred embodiments of the present utility model and should not be construed as limiting the scope of the present utility model. Those skilled in the art can understand that implementing all or part of the above-described embodiments and making equivalent changes in accordance with the claims of the present utility model are still within the scope of the utility model.

Claims

1. A semi-hollow shaft end-mounted embedded locking photoelectric encoder, characterized in that, The assembly includes a main body, a semi-hollow spindle, an embedded locking sleeve, lifting and fastening screws, bearings, a grating disk, a grating support, a parallel light source assembly, a circuit board, connectors, connecting screws, and a housing. A grating disk is mounted on the outer side of the semi-hollow spindle via the grating support. The semi-hollow spindle is rotatably connected to the main body via bearings and is located within the main body. The embedded locking sleeve is mounted on the spindle via lifting and fastening screws. The outer end of the spindle has an angled guide opening that matches the embedded locking sleeve. The parallel light source assembly is mounted on the main body. The circuit board is mounted on the main body via connectors and covers the parallel light source assembly. The housing is fixedly connected to the main body via connecting screws and covers the main body.

2. The semi-hollow shaft end-mounted embedded locking photoelectric encoder as described in claim 1, characterized in that, An inner sealing ring is provided between the housing and the combined body, and an outer sealing ring is provided at the end of the combined body away from the housing.

3. The semi-hollow shaft end-mounted embedded locking photoelectric encoder as described in claim 2, characterized in that, A cable assembly is provided on the outside of the housing via an aviation socket, and a threaded plug is also provided on the outside of the housing.

4. The semi-hollow shaft end-mounted embedded locking photoelectric encoder as described in claim 3, characterized in that, The connector consists of a support column and multiple connecting fastening screws. The support column is located at the three bottom corners of the circuit board via the connecting fastening screws, and the multiple connecting fastening screws are located on the assembly body.

5. The semi-hollow shaft end-mounted embedded locking photoelectric encoder as described in claim 4, characterized in that, The circuit board is equipped with electronic circuits. In the connection of the electronic circuit components, the upper end of the IC array chip D1 is connected to the resistor R1 and then to the power supply VCC through the wire. The resistor R2 is connected to the IC array chip D1. The two ends of the IC array chip D1 are connected to the power supply VCC and ground GND through the wire, respectively, and are connected to the A, B signals and the zero position signal Z through the wire.

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