Opto-electric encoder rotation protection device
By designing a rotation protection device for the photoelectric encoder, a stable connection between the rotating shaft and the shaft to be measured is achieved through the separate structure of the support and the protective cover. Furthermore, by connecting the sub-component and the main component, the problem of complex disassembly in the existing technology is solved, thereby improving the applicability and maintenance efficiency of the equipment.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- CHENGDU EBRIDGE TECH
- Filing Date
- 2025-07-09
- Publication Date
- 2026-07-31
AI Technical Summary
In the existing technology, when the rotational speed of the shaft under test is too high or the encoder is not needed temporarily, it is necessary to repeatedly disassemble and install the shaft and the shaft under test, which leads to complicated installation problems.
Design a rotation protection device for photoelectric encoder. By separating the support and the protective cover, the rotating shaft is connected to the shaft to be measured. The connecting sub-component and the main component are used to realize the engagement and disengagement of the rotating shaft and the positioning shaft. The protective cover can move laterally to realize the connection or separation of the code disk and the sensor, simplifying the disassembly process.
While keeping the rotating shaft connected to the shaft under test, the code disk and sensor can be quickly connected or separated by moving the protective cover laterally, which simplifies the disassembly process and improves the applicability and maintenance efficiency of the equipment.
Smart Images
Figure CN224580948U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of photoelectric encoder device technology, and in particular to a photoelectric encoder rotation protection device. Background Technology
[0002] An optical encoder is a sensor that converts the mechanical geometric displacement of an output shaft into pulses or digital signals through photoelectric conversion. It is widely used in industrial control systems requiring precise position, speed, or angle measurement. Its core principle is based on photoelectric conversion technology, achieving high-precision motion parameter detection through the coordinated work of optical structures and electronic circuits.
[0003] In existing technologies, the code disk is typically mounted on a rotating shaft, which is connected to the shaft under test, allowing the code disk to rotate synchronously with the shaft. A sensor, used to convert the mechanical rotational motion into digital pulse signals via photoelectric conversion, is then mounted on a housing. However, in some cases, when the shaft under test rotates too fast, or when the encoder is not needed temporarily, it is necessary to repeatedly disassemble and reassemble the rotating shaft and the shaft under test, which is quite complex. Utility Model Content
[0004] The main objective of this application is to provide a rotation protection device for a photoelectric encoder, which aims to solve the technical problem in the prior art that when the rotational speed of the shaft under test is too high, or when the encoder is not needed temporarily, it is necessary to repeatedly disassemble and install the shaft under test, which is quite complicated.
[0005] To achieve the above objectives, this application provides a photoelectric encoder rotation protection device, comprising:
[0006] A support member having a through-hole rotating shaft, the first end of which is used to connect to the shaft to be measured;
[0007] A protective cover, connected to the support member, is located around the second end of the rotating shaft. A rotatable positioning shaft is provided on the inner wall of the protective cover, and a first code disk is mounted on the positioning shaft. A first sensor for cooperating with the first code disk is also provided on the inner wall of the protective cover.
[0008] The positioning shaft is provided with a connecting sub-component, and the rotating shaft is provided with a connecting female component for cooperating with the connecting sub-component. The protective cover can move along the axial extension direction of the rotating shaft so that the connecting sub-component and the connecting female component can be selectively connected or separated.
[0009] Optionally, the support member has a through hole, and at least one first bearing is disposed in the through hole, and the rotating shaft is mounted on the support member through the at least one first bearing.
[0010] Optionally, the outer wall of the connecting sub-component is provided with a plurality of protrusions arranged circumferentially, the connecting female component is annular, and the inner sidewall of the connecting female component has a plurality of grooves for engaging with the protrusions.
[0011] Optionally, the width of the protrusion in the circumferential direction gradually increases radially outward.
[0012] Optionally, the axes of the positioning shaft and the rotating shaft are collinear.
[0013] Optionally, the inner wall of the protective cover is provided with a second bearing, one end of the positioning shaft is connected to the second bearing, and the other end is connected to the connecting sub-component.
[0014] Optionally, the protective cover has an open end, which is sleeved around the support member. The open end is provided with at least three locking rods distributed circumferentially. The outer wall of the support member is provided with a first locking hole and a second locking hole corresponding to the locking rods. The distance between the first locking hole and the second locking hole is greater than the thickness of the connecting sub-component. When the locking rods are respectively located at the first locking hole and the second locking hole, the connecting sub-component and the connecting mother member are respectively in a connected or separated state.
[0015] Optionally, the outer wall of the support member is provided with a guide groove, the extension direction of the guide groove is parallel to the axis of the rotating shaft, and the inner wall of the protective cover is provided with a guide block for cooperating with the guide groove.
[0016] Optionally, the sidewall of the opening end of the protective cover is provided with mounting holes that can be aligned with the first lock hole and the second lock hole respectively. The locking rod passes through the mounting holes. The mounting holes have external threads, and the first lock hole and the second lock hole have internal threads that mate with the external threads.
[0017] Optionally, a second code disk is also sleeved on the second end of the rotating shaft, and a second sensor for cooperating with the second code disk is provided on the support member.
[0018] The beneficial effects that this application can achieve are:
[0019] This application proposes a photoelectric encoder rotation protection device. By separating the support member and the protective cover, the rotating shaft for connecting to the shaft under test is mounted on the support member, while the first code disk and the first sensor are mounted on the protective cover. The rotating shaft and the positioning shaft can be engaged or disengaged via a connecting sub-component and a connecting mate. This means that while maintaining a constant connection between the rotating shaft and the shaft under test, the code disk and the shaft under test can be engaged or disengaged by laterally moving the protective cover. The rotating shaft and the positioning shaft can be connected or disengaged according to actual usage requirements, increasing the encoder's applicability. The protective cover also protects the code disk and the first sensor, and facilitates the removal of the protective cover from the support member for inspection or replacement of the first code disk and the first sensor. Attached Figure Description
[0020] Figure 1 This is a cross-sectional structural diagram of the connecting sub-component and connecting mother-component in a separated state according to an embodiment of this application.
[0021] Figure 2 for Figure 1 A cross-sectional structural diagram of the connecting sub-component and the connecting mother component when they are in a connected state;
[0022] Figure 3 for Figure 1 A schematic diagram of the structure when a second code disk and a second sensor are installed;
[0023] Figure 4 This is a structural diagram of the connecting sub-component;
[0024] Figure 5 This is a structural diagram of the connecting mother component.
[0025] The numbers on the map are:
[0026] 10-Support component, 20-Rotating shaft, 21-First bearing, 30-Protective cover, 40-Positioning shaft, 41-Second bearing, 50-First code disk, 60-First sensor, 70-Connecting sub-component, 71-Connecting female component, 72-Protrusion, 73-Groove, 80-Locking rod, 81-First locking hole, 82-Second locking hole, 90-Second code disk, 91-Second sensor.
[0027] The realization of the purpose, functional features and advantages of this application will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation
[0028] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.
[0029] It should be noted that all directional indicators (such as up, down, left, right, front, back, etc.) in this utility model embodiment are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicator will also change accordingly.
[0030] In this utility model, unless otherwise explicitly specified and limited, the terms "connection," "fixing," etc., should be interpreted broadly. For example, "fixing" can mean a fixed connection, a detachable connection, or an integral part; it can mean a mechanical connection or an electrical connection; it can mean a direct connection or an indirect connection through an intermediate medium; it can mean the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.
[0031] Furthermore, if the embodiments of this utility model involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the meaning of "and / or" throughout the text includes three parallel solutions; for example, "A and / or B" includes solution A, solution B, or a solution where both A and B are satisfied simultaneously. Furthermore, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.
[0032] Example 1
[0033] Reference Figures 1-5The first embodiment of this application provides a rotation protection device for a photoelectric encoder, including: a support member 10 through which a rotating shaft 20 is disposed, the first end of the rotating shaft 20 being used to connect to a shaft to be measured; a protective cover 30 connected to the support member 10, the protective cover 30 being located around the second end of the rotating shaft 20, a rotatable positioning shaft 40 being disposed on the inner wall of the protective cover 30, a first code disk 50 being disposed on the positioning shaft 40, and a first sensor 60 for cooperating with the first code disk 50 being disposed on the inner wall of the protective cover 30, wherein a connecting sub-component 70 is disposed on the positioning shaft 40, and a connecting female component 71 for cooperating with the connecting sub-component 70 is disposed at the second end of the rotating shaft 20, and the protective cover 30 is movable along the axial extension direction of the rotating shaft 20 so that the connecting sub-component 70 and the connecting female component 71 can be selectively connected or separated.
[0034] In this embodiment, the photoelectric encoder is a precision sensor that converts mechanical displacement (angular or linear displacement) into electrical signals through photoelectric conversion. Its core principle is based on a grating structure and photoelectric detection technology, achieving precise measurement of displacement or angle by analyzing changes in the light signal. The working principle of the photoelectric encoder is based on the moiré fringe effect (incremental). The code disk is engraved with uniformly distributed radial lines (gratings), and the spacing between the lines determines the resolution. When the code disk rotates, the light emitted by the light source passes through the code disk and the fixed grating (or another code disk), forming alternating bright and dark moiré fringes. The direction and speed of the moiré fringe movement are proportional to the rotation direction and speed of the code disk. The photosensitive element detects changes in the moiré fringes and outputs two orthogonal signals (phase A and phase B) with a 90° phase difference. By determining the phase relationship between phase A and phase B, the rotation direction can be determined; by counting the number of pulses, the rotation angle or displacement can be calculated.
[0035] The first sensor 60 can be a Sendix Base KIS40 / KIH40, integrating a light source, a photosensitive element, and a signal processing circuit. The light source (such as an LED) emits a beam of light that illuminates the first code disk 50, a disc with a specific coding pattern, typically composed of alternating transparent and opaque areas. As the code disk rotates with a mechanical axis, the transparent and opaque areas alternately block and transmit the light beam. The photosensitive element (such as a photodiode or phototransistor) receives the light beam transmitted through the code disk and converts it into an electrical signal. Due to the design of the code disk's coding pattern, the light signal received by the photosensitive element changes with the rotation of the code disk, forming a periodic electrical signal. The signal processing circuit amplifies, shapes, and directions the electrical signal output by the photosensitive element, outputting two orthogonal square wave signals (phase A and phase B) and a zero-position reference signal (phase Z). The phase difference between phase A and phase B reflects the rotation direction of the code disk, while the signal frequency is proportional to the rotation speed of the code disk. The Z-phase signal is used to determine the zero position of the code disk, that is, the origin of the encoder.
[0036] The rotating shaft 20 is mounted on the support member 10, which is cylindrical. The rotating shaft 20 can only rotate around its axis and will not move axially. Figure 1 As shown, the left end of the rotating shaft 20 is the first end, and the right end is the second section. The first end is used to connect with the shaft to be measured (not shown in the figure), and the second end is located within the space covered by the protective cover 30. A positioning shaft 40 is provided on the inner wall of the protective cover 30. The positioning shaft 40 can only rotate around its own axis and will not move axially. The first sensor 60 is also provided on the inner wall of the protective cover 30, and the first code disk 50 is provided on the positioning shaft 40. The first code disk 50 can rotate with the positioning shaft 40. During use, the protective cover 30, the positioning shaft 40, and the first sensor 60 are a whole and will not move relative to each other. A connecting sub-component 70 is provided on the positioning shaft 40, and a connecting female component 71 is provided on the second section of the rotating shaft 20. The protective cover 30 can drive the positioning shaft 40 to move left and right. When the positioning shaft 40 moves towards the rotating shaft 20, the connecting sub-component 70 and the connecting female component 71 approach each other until they connect, thus connecting the positioning shaft 40 and the rotating shaft 20. At this time, the rotation of the rotating shaft 20 can drive the positioning shaft 40 to rotate, thereby causing the first code disk 50 to rotate accordingly. When the positioning shaft 40 moves away from the rotating shaft 20, the connecting sub-component 70 and the connecting female component 71 gradually transition from a connected state to a separated state. After the connecting sub-component 70 and the connecting female component 71 are separated, the rotation of the rotating shaft 20 will not drive the positioning shaft 40 to rotate. At this time, the rotating shaft 20 can achieve the separation of the test shaft and the first code disk 50 while maintaining its connection with the test shaft. That is, it is not necessary to repeatedly disassemble and install the test shaft and the rotating shaft 20. The separation of the first code disk 50 and the test shaft can be quickly achieved by moving the protective cover 30 laterally. Furthermore, since the support member 10 and the protective cover 30 are separate structures, when it is necessary to replace the encoder and sensor with different precision, it can be done without separating the rotating shaft 20 from the shaft to be measured, which improves the efficiency of replacement and also facilitates inspection or maintenance by removing the protective cover 30 from the support member 10. The protective cover 30 has a wire harness hole for the wire harness of the sensor and other components to pass through.
[0037] Example 2
[0038] As an optional implementation, this embodiment provides an installation structure for a rotating shaft 20, including: a support member 10 having a through hole, at least one first bearing 21 being disposed in the through hole, and the rotating shaft 20 being installed on the support member 10 through the at least one first bearing 21.
[0039] Specifically, by installing at least one first bearing 21 inside the through hole, Figures 1-3The diagram shows two first bearings 21. By setting the first bearings 21, the rotating shaft 20 is supported, which improves the stability of the rotating shaft 20 during rotation. Limiting structures can be set at both ends of the through hole to limit the bearings and prevent the rotating shaft 20 from moving axially.
[0040] Optionally, the outer wall of the connecting sub-component 70 is provided with a plurality of protrusions 72 arranged circumferentially, the connecting mother 71 is annular, and the inner sidewall of the connecting mother 71 has a plurality of grooves 73 for engaging with the protrusions 72.
[0041] Specifically, multiple protrusions 72 are provided on the connecting sub-component 70, forming grooves between adjacent protrusions 72. Multiple grooves 73 are provided on the connecting female component 71, forming blocks between adjacent grooves 73. When the connecting sub-component 70 and the connecting female component 71 move closer to each other, the protrusions 72 and grooves 73 engage, and the grooves and blocks engage to form a limiting structure, allowing the connecting sub-component 70 and the connecting female component 71 to move synchronously in the circumferential direction without affecting their movement away from each other along the axial direction of the rotating shaft 20. When the connecting sub-component 70 and the connecting female component 71 separate, they are in a separated state. It should be noted that a transparent observation window can be provided on the protective cover 30, or the entire protective cover can be made of transparent material, so that the user can align the protrusions 72 and grooves 73. During the lateral movement of the protective cover 30, since the positioning shaft 40 cannot be controlled, the rotating shaft 20 can be manually controlled to rotate, thereby driving the connecting female part 71 to rotate, so as to ensure that the protrusion 72 and the groove 73 can be aligned, thus ensuring the smooth connection of the connecting female part 70 and the connecting female part 71.
[0042] Optionally, the width of the protrusion 72 in the circumferential direction gradually increases radially outward.
[0043] Specifically, the shape of the protrusion 72 is restricted to improve the connection stability between the connecting sub-component 70 and the connecting mother component 71.
[0044] Optionally, the axes of positioning axis 40 and rotating axis 20 are collinear.
[0045] Specifically, when the rotating shaft 20 drives the positioning shaft 40 to rotate, the stability of the positioning shaft 40 during rotation is improved.
[0046] Optionally, the inner wall of the protective cover 30 is provided with a second bearing 41, one end of the positioning shaft 40 is connected to the second bearing 41, and the other end is connected to a connecting piece 70.
[0047] Specifically, the second bearing 41 and the first bearing 21 can have the same structure. By setting the second bearing 41, the positioning shaft 40 is supported, and the stability of the positioning shaft 40 during rotation is improved. A limiting structure can be set on the second bearing 41 to restrict the positioning shaft 40 from moving along its axial direction.
[0048] Example 3
[0049] As an optional implementation, this embodiment provides a specific structure of a protective cover 30, including: the protective cover 30 has an open end, the open end is sleeved around the support member 10, the open end is provided with at least three locking rods 80 distributed circumferentially, the outer wall of the support member 10 is provided with a first locking hole 81 and a second locking hole 82 corresponding to the locking rods 80, the distance between the first locking hole 81 and the second locking hole 82 is greater than the thickness of the connecting sub-part 70, when the locking rods 80 are respectively located at the positions of the first locking hole 81 and the second locking hole 82, the connecting sub-part 70 and the connecting mother member 71 are respectively in a connected or separated state.
[0050] Optionally, the side wall of the opening end of the protective cover 30 is provided with mounting holes that can be aligned with the first locking hole 81 and the second locking hole 82 respectively. The locking rod 80 passes through the mounting holes, the mounting holes have external threads, and the first locking hole 81 and the second locking hole 82 have internal threads that mate with the external threads.
[0051] Specifically, by engaging the locking rod 80 with the first locking hole 81 and the second locking hole 82 respectively, the protective cover 30 and the support member 10 are connected when the connecting sub-component 70 and the connecting female component 71 are in the connected and separated states, respectively. This prevents the protective cover 30 from moving arbitrarily, ensures the stability of the connecting sub-component 70 and the connecting female component 71 when they are connected, and prevents accidental collisions when the connecting sub-component 70 and the connecting female component 71 are separated.
[0052] Optionally, the outer wall of the support member 10 is provided with a guide groove (not shown in the figure), the extension direction of the guide groove is parallel to the axis of the rotating shaft 20, and the inner wall of the protective cover 30 is provided with a guide block (not shown in the figure) for cooperating with the guide groove.
[0053] Specifically, by setting guide grooves and guide blocks, the protective cover 30 plays a guiding and anti-foolproof role during its movement, so that the protective cover 30 will not move relative to the support member 10 in the circumferential direction, and the mounting holes on the protective cover 30 can be aligned with the first lock hole 81 and the second lock hole 82 respectively.
[0054] Optionally, a second code disk 90 is also fitted onto the second end of the rotating shaft 20, and a second sensor 91 for cooperating with the second code disk 90 is provided on the support member 10. Both the first sensor 60 and the second sensor 91 can be transmissive sensors or reflective sensors. When a reflective sensor is used, a sensing element can be installed on one side of the code disk or a sensing element can be installed on both sides of the code disk simultaneously.
[0055] Specifically, when the rotating shaft 20 is equipped with a second code disk 90 and a second sensor 91, the combination of the first code disk 50 and the first sensor 60 can serve as an alternative encoding component. That is, when the second code disk 90 and the second sensor 91 malfunction, the rotating shaft 20 and the positioning shaft 40 can be quickly connected, and measurement can be performed through the first code disk 50 and the first sensor 60. Similarly, the measurement results of the combination of the first code disk 50 and the first sensor 60 can also be used to calibrate the measurement structure of the combination of the second code disk 90 and the second sensor 91.
[0056] The above are merely preferred embodiments of this application and do not limit the patent scope of this application. Any equivalent structural or procedural transformations made using the content of this application's specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this application.
Claims
1. An optical encoder rotation protection device, characterized by, include: A support member having a through-hole rotating shaft, the first end of which is used to connect to the shaft to be measured; A protective cover, connected to the support member, is located around the second end of the rotating shaft. A rotatable positioning shaft is provided on the inner wall of the protective cover, and a first code disk is mounted on the positioning shaft. A first sensor for cooperating with the first code disk is also provided on the inner wall of the protective cover. The positioning shaft is provided with a connecting sub-component, and the second end of the rotating shaft is provided with a connecting female component for cooperating with the connecting sub-component. The protective cover can move along the axial extension direction of the rotating shaft so that the connecting sub-component and the connecting female component can be selectively connected or separated.
2. The optical encoder rotation protection device of claim 1, wherein, The support member has a through hole, and at least one first bearing is disposed in the through hole. The rotating shaft is mounted on the support member through the at least one first bearing.
3. The optical encoder rotation protection apparatus of claim 1, wherein, The outer wall of the connecting sub-component is provided with a plurality of protrusions arranged circumferentially, the connecting female component is annular, and the inner sidewall of the connecting female component has a plurality of grooves for engaging with the protrusions.
4. The optical encoder rotation protection apparatus of claim 3, wherein, The width of the protrusion in the circumferential direction gradually increases radially outward.
5. The optical encoder rotation protection apparatus of claim 1, wherein, The locating shaft and the rotating shaft are collinear.
6. The optical encoder rotation protection apparatus of claim 1, wherein, The inner wall of the protective cover is provided with a second bearing, one end of the positioning shaft is connected to the second bearing, and the other end is connected to the connecting component.
7. The optical encoder rotation protection apparatus of claim 1, wherein, The protective cover has an open end, which is sleeved around the support member. The open end is provided with at least three locking rods distributed circumferentially. The outer wall of the support member is provided with a first locking hole and a second locking hole corresponding to the locking rods. The distance between the first locking hole and the second locking hole is greater than the thickness of the connecting sub-component. When the locking rods are respectively located at the first locking hole and the second locking hole, the connecting sub-component and the connecting mother member are respectively in a connected or separated state.
8. The optical encoder rotation protection apparatus of claim 7, wherein, The outer wall of the support member is provided with a guide groove, the extension direction of the guide groove is parallel to the axis of the rotating shaft, and the inner wall of the protective cover is provided with a guide block for cooperating with the guide groove.
9. The optical encoder rotation protection apparatus of claim 7, wherein, The protective cover has a through-hole on its open end sidewall that can be aligned with the first lock hole and the second lock hole respectively. The locking rod passes through the mounting hole. The mounting hole has an external thread, and the first lock hole and the second lock hole have internal threads that mate with the external thread.
10. The optical encoder rotation protection apparatus of claim 1, wherein, The second end of the rotating shaft is also fitted with a second code disk, and the support member is provided with a second sensor for cooperating with the second code disk.