A rotary encoder fixed grating assembly vision positioning device

Abstract

The utility model discloses a kind of rotary encoder fixed grating assembly vision positioning devices, for the positioning accuracy insufficient when fixed grating and main shaft are assembled in prior art, inconvenient problem of adjustment, the device includes base, guide pillar assembly, light source, camera, XY double-shaft sliding table, substrate, main shaft jig, transfer sliding table, XYZ three-shaft sliding table and grating jig;Among them, camera is configured telecentric lens, and it is correspondingly set up up and down with light source, can high-precision capture main shaft and fixed grating position;Main shaft jig and grating jig are positioned encoder main shaft and fixed grating respectively;XY double-shaft sliding table, transfer sliding table and XYZ three-shaft sliding table combination form three-dimensional adjustment mechanism, realize micron level precision fine adjustment.The device guarantees overall stability through base, combined with high-pixel camera and adjustable light source, realize high-precision vision measurement, ensure that fixed grating and main shaft installation repeatability positioning accuracy is ≤0.005mm, satisfy 2500 line above high-resolution encoder production demand.

Description

Technical Field

[0001] This utility model relates to the field of photoelectric rotary encoder manufacturing technology, specifically a visual positioning device for assembling a fixed grating of a rotary encoder. Background Technology

[0002] In the production process of photoelectric rotary encoders, the assembly accuracy of the fixed grating and the spindle directly affects the encoder's resolution and performance. Currently, when a resolution of 2500 lines or higher is required, the repeatability of the installation of the fixed grating and the spindle must be controlled within 0.005 mm, which places extremely high demands on the precision of the assembly device.

[0003] In the existing technology, the installation of the fixed grating and the main shaft of the rotary encoder has the following problems: First, there is a lack of dedicated high-precision installation devices to ensure assembly accuracy; second, there is a lack of efficient vision measurement systems to accurately grasp the position of the main shaft center and the fixed grating; third, when the measurement results do not meet the accuracy requirements, it is difficult to make precise fine adjustments to the relative position of the fixed grating and the main shaft.

[0004] Therefore, in view of the shortcomings of the existing technology, it is necessary to design a rotary encoder fixed grating assembly visual positioning device to solve the above problems. Utility Model Content

[0005] The present invention aims to provide a visual positioning device for assembling a fixed grating of a rotary encoder, so as to solve the problems of insufficient positioning accuracy and inconvenient adjustment when assembling the fixed grating with the spindle in the prior art, and to achieve high-precision visual positioning and fine adjustment to meet the production needs of high-resolution encoders.

[0006] To achieve the above and other related objectives, the technical solution provided by this utility model is: a rotary encoder fixed grating assembly visual positioning device, comprising:

[0007] Base;

[0008] The guide post assembly includes two guide posts, which are vertically fixed on the base.

[0009] A light source, which is fixed to the guide post assembly by a light source fixing plate;

[0010] The camera is mounted on the guide post assembly in an adjustable manner via a camera mounting bracket. The camera is equipped with a telecentric lens, which is vertically aligned with the light source.

[0011] An XY dual-axis slide table, which is fixedly mounted on the base;

[0012] A substrate, which is fixed to the moving end of the XY dual-axis slide;

[0013] A spindle fixture, which is fixed to one side of the base plate, is used to position the encoder spindle.

[0014] A transfer slide, which is fixed on the other side of the substrate;

[0015] The XYZ three-axis slide is fixed on the slide base of the transfer slide and can be close to or far from the main spindle fixture.

[0016] A grating fixture, which is fixed to the moving end of the XYZ three-axis slide table, is used to position and fix the grating.

[0017] Both the spindle fixture and the grating fixture are located on the bottom side of the light source.

[0018] The preferred technical solution is as follows: the light source fixing plate is slidably mounted on the two guide posts through a guide sleeve, and the guide sleeve is provided with positioning bolts.

[0019] The preferred technical solution is as follows: the camera mounting bracket consists of a fixed plate, a movable plate, a lead screw, a lead screw nut, and a hand crank. The fixed plate is mounted on the top of the two guide posts. The movable plate is slidably mounted on the two guide posts via a guide sleeve. The lead screw is vertically mounted on the fixed plate via a bearing. The hand crank is mounted on the top of the lead screw. The lead screw nut is screwed onto the lead screw and fixedly connected to the movable plate. The camera is detachably mounted on the movable plate.

[0020] A preferred technical solution is as follows: the spindle fixture consists of a fixed base and finger-shaped positioning members. The fixed base is fixed on the base plate. The top of the fixed base is provided with a spindle mounting groove. The front side of the top of the fixed base is provided with an opening communicating with the spindle mounting groove. Two optical shafts that can slide in the front-back direction are inserted through the fixed base. The finger-shaped positioning members are fixed at the front ends of the two optical shafts and are arranged opposite to the opening. The finger-shaped positioning members are configured to be inserted into the slot of the encoder to restrict its rotation.

[0021] The preferred technical solution is as follows: the grating fixture includes a positioning plate, which is arranged along the front-back direction. One end of the positioning plate is fixedly connected to the moving end of the XYZ three-axis slide table, and the top of the other end is provided with a grating positioning groove for positioning and fixing the grating.

[0022] Due to the application of the above technical solution, the beneficial effects of this utility model are as follows:

[0023] This utility model provides a visual positioning device for assembling a fixed grating of a rotary encoder. The base ensures the overall stability of the device, providing a reliable foundation for high-precision measurement and assembly. A high-pixel camera paired with a telecentric lens and an adjustable brightness light source enables high-precision visual measurement of the positions of the spindle and the fixed grating, accurately capturing their positional information. A combination of an XY dual-axis slide, a transfer slide, and an XYZ three-axis slide forms a high-precision three-dimensional adjustment mechanism with micron-level adjustment accuracy. This allows for precise fine-tuning of the fixed grating's position, ensuring that the installation repeatability of the fixed grating and spindle is controlled within 0.005mm, meeting the production requirements of high-resolution encoders with over 2500 lines. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the overall structure of the positioning device involved in this utility model.

[0025] Figure 2 This is a schematic diagram of the camera mounting structure involved in this utility model.

[0026] Figure 3 This is a schematic diagram of the adjustment fixture for the spindle and grating involved in this utility model. Detailed Implementation

[0027] The following specific embodiments illustrate the implementation of this utility model. Those skilled in the art can easily understand other advantages and effects of this utility model from the content disclosed in this specification.

[0028] Please see Figures 1-3 It should be noted that in the description of this utility model, the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the utility model product is in use. These terms are used only for the convenience of describing this utility model and for simplifying the description, and do not indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first," "second," and "third," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance. The terms "horizontal," "vertical," and "suspended," etc., do not indicate that the component must be absolutely horizontal or suspended, but rather that it can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal than "vertical," and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0029] In the description of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0030] Example:

[0031] like Figures 1 to 3 As shown, according to a general technical concept of this utility model, a visual positioning device for assembling a rotary encoder fixed grating is provided, comprising:

[0032] Base 1;

[0033] The guide post assembly 2 includes two guide posts 21, which are vertically fixed on the base 1.

[0034] Light source 3 is fixed to guide post assembly 2 via light source fixing plate 4;

[0035] Camera 5 is mounted on guide post assembly 2 in an adjustable manner via camera mounting bracket. Camera 5 is equipped with telecentric lens 6, which is vertically aligned with light source 3.

[0036] XY dual-axis slide 7, XY dual-axis slide 7 is fixed on base 1;

[0037] The substrate 8 is fixed to the moving end of the XY dual-axis slide 7.

[0038] Main spindle fixture 9 is fixed on one side of the base plate 8 and is used to position the encoder spindle.

[0039] A transfer slide 10 is fixed on the other side of the substrate 8;

[0040] XYZ three-axis slide 11 is fixed on the slide base of transfer slide 10 and can be close to or away from the main spindle fixture 9.

[0041] The grating fixture 12 is fixed to the moving end of the XYZ three-axis slide table 11 and is used to position and fix the grating.

[0042] Both the spindle fixture 9 and the grating fixture 12 are located on the bottom side of the light source 3.

[0043] like Figures 1 to 3As shown, in an exemplary embodiment of this utility model, the light source fixing plate 4 is slidably mounted on two guide posts 21 via a guide sleeve 41, and the guide sleeve 41 is provided with positioning bolts.

[0044] like Figures 1 to 3 As shown, in an exemplary embodiment of this utility model, the camera mounting bracket consists of a fixed plate 51, a movable plate 52, a lead screw 53, a lead screw nut 54, and a hand crank 55. The fixed plate 51 is mounted on the top of two guide posts 21. The movable plate 52 is slidably mounted on the two guide posts 21 via a guide sleeve 521. The lead screw 53 is vertically mounted on the fixed plate 51 via a bearing. The hand crank 55 is mounted on the top of the lead screw 53. The lead screw nut 54 is screwed onto the lead screw 53 and fixedly connected to the movable plate 52. The camera 5 is detachably mounted on the movable plate 52, meaning that the mounting height of the camera 5 can be controlled by the hand crank 55.

[0045] like Figures 1 to 3 As shown, in an exemplary embodiment of this utility model, the spindle fixture 9 consists of a fixed base 91 and a finger-shaped positioning member 92. The fixed base 91 is fixed on the base plate 8. The top of the fixed base 91 is provided with a spindle mounting groove for mounting the spindle 100. The front side of the top of the fixed base 91 is provided with an opening communicating with the spindle mounting groove. Two optical shafts 93 that can slide in the front-back direction are inserted through the fixed base 91. The finger-shaped positioning member 92 is fixed at the front end of the two optical shafts 93 and is arranged opposite to the opening. The finger-shaped positioning member 92 is configured to be inserted into the slot of the encoder to restrict its rotation, that is, to achieve circumferential positioning.

[0046] like Figures 1 to 3 As shown, in an exemplary embodiment of this utility model, the grating fixture 12 includes a positioning plate 121, which is arranged in the front-back direction. One end of the positioning plate 121 is fixedly connected to the moving end of the XYZ three-axis slide table 11, and the top of the other end is provided with a grating positioning groove for positioning and fixing the grating 200.

[0047] Therefore, this utility model has the following advantages:

[0048] This utility model provides a visual positioning device for assembling a fixed grating of a rotary encoder. The base ensures the overall stability of the device, providing a reliable foundation for high-precision measurement and assembly. A high-pixel camera paired with a telecentric lens and an adjustable brightness light source enables high-precision visual measurement of the positions of the spindle and the fixed grating, accurately capturing their positional information. A combination of an XY dual-axis slide, a transfer slide, and an XYZ three-axis slide forms a high-precision three-dimensional adjustment mechanism with micron-level adjustment accuracy. This allows for precise fine-tuning of the fixed grating's position, ensuring that the installation repeatability of the fixed grating and spindle is controlled within 0.005mm, meeting the production requirements of high-resolution encoders with over 2500 lines.

[0049] The above embodiments are merely illustrative of the principles and effects of this utility model and are not intended to limit the scope of this utility model. Any person skilled in the art can modify or alter the above embodiments without departing from the spirit and scope of this utility model. Therefore, all equivalent modifications or alterations made by those skilled in the art without departing from the spirit and technical concept disclosed in this utility model should still be covered by the claims of this utility model.

Claims

1. A visual positioning device for assembling a fixed grating with a rotary encoder, characterized in that, include: Base; The guide post assembly includes two guide posts, which are vertically fixed on the base. A light source, which is fixed to the guide post assembly by a light source fixing plate; The camera is mounted on the guide post assembly in an adjustable manner via a camera mounting bracket. The camera is equipped with a telecentric lens, which is vertically aligned with the light source. An XY dual-axis slide table, which is fixedly mounted on the base; A substrate, which is fixed to the moving end of the XY dual-axis slide; A spindle fixture, which is fixed to one side of the base plate, is used to position the encoder spindle. A transfer slide, which is fixed on the other side of the substrate; The XYZ three-axis slide is fixed on the slide base of the transfer slide and can be close to or far from the main spindle fixture. A grating fixture, which is fixed to the moving end of the XYZ three-axis slide table, is used to position and fix the grating. Both the spindle fixture and the grating fixture are located on the bottom side of the light source.

2. The rotary encoder fixed grating assembly visual positioning device according to claim 1, characterized in that: The light source fixing plate is slidably mounted on the two guide posts via a guide sleeve, and the guide sleeve is provided with positioning bolts.

3. The rotary encoder fixed grating assembly visual positioning device according to claim 1, characterized in that: The camera mounting bracket consists of a fixed plate, a movable plate, a lead screw, a lead screw nut, and a hand crank. The fixed plate is mounted on the top of the two guide posts. The movable plate is slidably mounted on the two guide posts via a guide sleeve. The lead screw is vertically mounted on the fixed plate via a bearing. The hand crank is mounted on the top of the lead screw. The lead screw nut is screwed onto the lead screw and fixedly connected to the movable plate. The camera is detachably mounted on the movable plate.

4. The rotary encoder fixed grating assembly visual positioning device according to claim 1, characterized in that: The spindle fixture consists of a fixed base and finger-shaped positioning members. The fixed base is fixed on the base plate. The top of the fixed base is provided with a spindle mounting groove. The front side of the top of the fixed base is provided with an opening that communicates with the spindle mounting groove. Two optical shafts that can slide in the front-back direction are inserted through the fixed base. The finger-shaped positioning members are fixed at the front ends of the two optical shafts and are arranged opposite to the opening. The finger-shaped positioning members are configured to be inserted into the slot of the encoder to restrict its rotation.

5. The rotary encoder fixed grating assembly visual positioning device according to claim 1, characterized in that: The grating fixture includes a positioning plate, which is arranged along the front-back direction. One end of the positioning plate is fixedly connected to the moving end of the XYZ three-axis slide table, and the other end has a grating positioning groove on its top for positioning and fixing the grating.

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