Alignment jig assembly, encoder assembly and manufacturing method of encoder
By using light-transmitting patterns and alignment sheets in the encoder alignment fixture assembly, the problem of low detection accuracy of the encoder is solved, and the optimal state of motor operation is achieved.
Patent Information
- Application Number
- CN202510390730.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-31
- Publication Date
- 2025-06-13
AI Technical Summary
The detection accuracy of the encoder is mainly due to the poor alignment between the circuit board and the code disk during assembly.
A alignment fixture assembly is adopted, including a substrate and a alignment sheet, with a light-transmitting area and a first positioning part on the substrate, and a light-transmitting pattern on the alignment sheet. Adjust the position of the alignment chip by aligning the light-transmitting pattern with the signal receiving area and the code channel to ensure the correct alignment between the circuit board and the code disk.
Improve the detection accuracy of the encoder to ensure that the motor is operating in the best condition.
Smart Images
Figure CN120134239A_ABST
Abstract
Description
Technical Field
[0001] The present application relates to the technical field of motors, and particularly relates to an alignment jig assembly, an encoder assembly, and a manufacturing method of an encoder. Background Art
[0002] A motor is a device that converts electrical energy into mechanical energy and is widely used in various mechanical equipment, automation systems, household appliances and other fields. During the operation of the motor, in order to ensure its performance and stability, an encoder is usually provided in the motor. Through the encoder, the position of the motor shaft can be monitored in real time, so as to adjust the control strategy and ensure that the motor operates in the best state. The encoder includes a rotary optical encoder, and the rotary optical encoder can be divided into two types: transmissive and reflective. The reflective rotary optical encoder includes a circuit board and a code disk with a reflective track. A signal receiving area for receiving the optical signal reflected by the track is provided on the circuit board. In the motor, the circuit board is fixed on the bracket, and the code disk is fixed on the shaft of the motor. During assembly, there is a problem of poor alignment between the signal receiving area on the circuit board and the track on the code disk, which reduces the detection accuracy of the encoder. Summary of the Invention
[0003] The present application provides an alignment jig assembly, an encoder assembly, and a manufacturing method of an encoder, which can solve the problem of low detection accuracy of the encoder.
[0004] According to one aspect of the present application, an alignment jig assembly is provided in an embodiment, including: A substrate, on which a first positioning portion is provided, and the first positioning portion is used to limit the relative movement between the substrate and the circuit board of the encoder. The substrate has a light-transmitting area; An alignment piece, which is used to be fixed on the substrate after position adjustment. A light-transmitting pattern corresponding to the position of the signal receiving area on the circuit board is provided on the alignment piece, and the vertical projection of the light-transmitting pattern on the substrate is located within the contour of the light-transmitting area; the light-transmitting pattern is used to correspond to the signal receiving area and serves as an observation object for whether the position adjustment of the alignment piece is in place when the alignment piece is fixed; the light-transmitting pattern is used to correspond to the track on the code disk and serves as an observation object for whether the position adjustment of the bracket is in place during the assembly of the encoder.
[0005] In one embodiment, the light-transmitting area is provided with a through hole, and a circumferentially arranged flange surrounding the through hole is provided on the inner wall of the through hole. The alignment piece is located in the through hole and is provided on the end face of the flange, and a displacement space for position adjustment of the alignment piece is left on the end face of the flange.
[0006] In one embodiment, the substrate is a glass substrate, and the contour of the light-transmitting area is the outer contour of the glass substrate.
[0007] In one embodiment, an elastic pressing arm is provided on the substrate. One end of the elastic pressing arm is fixedly connected to the substrate by a screw, and the other end is used to press and fix the alignment piece after the position of the alignment piece is adjusted. Alternatively, an adhesive portion is provided on the substrate, and the adhesive portion is used to adhesively fix the alignment piece after the position of the alignment piece is adjusted. Alternatively, a first magnetic attraction portion is fixedly provided on the substrate, and a second magnetic attraction portion magnetically attracted to the first magnetic attraction portion. The second magnetic attraction portion is used to press and fix the alignment piece by the attraction force between the second magnetic attraction portion and the first magnetic attraction portion after the position of the alignment piece is adjusted.
[0008] In one embodiment, the light-transmitting pattern includes a first pattern area and a second pattern area arranged in sequence along the radial direction. The first pattern area is used to correspond to the position of the first signal receiving area on the circuit board and the first code track on the code disk, and the second pattern area is used to correspond to the position of the second signal receiving area on the circuit board and the second code track on the code disk.
[0009] In one embodiment, the first pattern area has a plurality of first sub-patterns, the second pattern area has a plurality of second sub-patterns, the first signal receiving area has a plurality of first sub-receiving areas, the second signal receiving area has a plurality of second sub-receiving areas. The first sub-patterns and the first sub-receiving areas are in one-to-one correspondence, and the shapes of the first sub-patterns and the corresponding first sub-receiving areas are the same; the second sub-patterns and the second sub-receiving areas are in one-to-one correspondence, and the shapes of the second sub-patterns and the corresponding second sub-receiving areas are the same.
[0010] In one embodiment, a boss structure is provided in the outer peripheral area of the front end surface of the substrate, and the boss structure is used to contact the circuit board to support the substrate.
[0011] According to another aspect of the present application, in one embodiment, an encoder assembly is provided, including: a bracket, a circuit board, a code disk, and the alignment jig assembly as described above; The code disk is provided with code tracks, and the code disk is used to be fixed on the rotating shaft of the motor; The bracket is used for fixedly mounting on the end cover of the motor. The circuit board is used for fixedly mounting on the bracket. The substrate is used for detachably connecting with the bracket. The circuit board is provided with a second positioning portion corresponding to the first positioning portion. The bracket is provided with a third positioning portion corresponding to the first positioning portion and the second positioning portion. The third positioning portion is used for cooperating with the first positioning portion and the second positioning portion when fixing the alignment piece to limit the relative movement between the circuit board and the substrate. The third positioning portion is also used for cooperating with the first positioning portion when positioning the mounting position of the bracket to limit the relative movement between the bracket and the substrate. The third positioning portion is also used for cooperating with the second positioning portion when fixedly mounting the circuit board to limit the relative movement between the bracket and the circuit board.
[0012] In one embodiment, the third positioning portion includes at least two positioning pins. The first positioning portion includes at least two first through holes. The second positioning portion includes second through holes corresponding to the first through holes. The positioning pins are used for inserting into the first through holes and the second through holes when fixing the alignment piece to limit the relative movement between the substrate and the circuit board, for inserting into the first through holes when positioning the mounting position of the bracket to limit the relative movement between the bracket and the substrate, and for inserting into the second through holes when fixedly mounting the circuit board to limit the relative movement between the circuit board and the bracket.
[0013] According to another aspect of the present application, in one embodiment, a manufacturing method of an encoder is provided, including: Providing the encoder assembly as described above; Positioning the substrate on the circuit board through the cooperation of the first positioning portion, the second positioning portion and the third positioning portion; Placing the alignment piece on the light-transmitting area of the substrate, adjusting the position of the alignment piece until it is observed that the vertical projection of the light-transmitting pattern on the circuit board is aligned with the signal receiving area, and fixing the alignment piece on the substrate after alignment; Fixing the code disk on the rotating shaft of the motor and pre-fixing the bracket on the end cover of the motor; Positioning the substrate with the alignment piece fixed thereon on the bracket through the cooperation of the first positioning portion and the third positioning portion, adjusting the position of the bracket on the end cover until it is observed that the vertical projection of the light-transmitting pattern on the code disk is aligned with the code track, removing the substrate after alignment, and fixing the bracket on the end cover; Fixing the circuit board on the bracket through the cooperation of the second positioning portion and the third positioning portion.
[0014] According to the alignment fixture assembly, encoder assembly and manufacturing method of the encoder of the above embodiments, the alignment piece of the alignment fixture assembly is provided with a light-transmitting pattern. During assembly, the fixed position of the alignment piece on the substrate can be adjusted according to the alignment between the light-transmitting pattern and the signal receiving area. After the alignment piece is fixed, the substrate and the bracket are fixed, and the fixed position of the bracket on the end cover is adjusted according to the alignment between the light-transmitting pattern and the code track on the code disk. After the fixed position of the bracket is adjusted, the signal receiving area on the circuit board fixed on the bracket can be aligned with the code track on the code disk, which is beneficial to improving the detection accuracy of the encoder. Description of the Drawings
[0015] Figure 1 Schematic structural diagram of an alignment fixture assembly of an embodiment; Figure 2 Schematic structural diagram of an alignment piece of an embodiment; Figure 3 Schematic structural diagram of a boss structure provided on a substrate of an embodiment; Figure 4 Schematic structural diagram of a substrate arranged on a circuit board when adjusting the alignment piece of an embodiment; Figure 5 Schematic structural diagram of a circuit board of an embodiment; Figure 6 Schematic structural diagram of an alignment piece placed on a substrate when adjusting the alignment piece of an embodiment; Figure 7 Schematic structural diagram of an alignment piece fixed on a substrate of an embodiment; Figure 8 Schematic structural diagram of a circuit board located between a bracket and a substrate of an embodiment; Figure 9 Schematic structural diagram of a substrate located between a bracket and a circuit board of an embodiment; Figure 10 Schematic structural diagram of a bracket pre-fixed on the end cover of a motor of an embodiment; Figure 11 Schematic structural diagram of a substrate positioned on a bracket of an embodiment; Figure 12 Schematic structural diagram of a circuit board fixed on a bracket of an embodiment; Figure 13 Flowchart of the manufacturing method of an encoder of an embodiment; Description of the Reference Numerals: 1 - Substrate; 101 - Through - hole; 102 - Flange; 103 - First positioning portion; 104 - Boss structure; 2 - Alignment piece; 201 - Translucent pattern; 202 - First pattern area; 203 - Second pattern area; 3 - Circuit board; 301 - Signal receiving area; 302 - Second positioning portion; 303 - Second signal receiving area; 304 - First signal receiving area; 4 - Bracket; 5 - Positioning pin; 6 - End cap; 7 - Code disk; 701 - First code track; 702 - Second code track. Detailed implementation manners
[0016] The present application will be further described in detail below in conjunction with the accompanying drawings through specific implementation manners. Similar elements in different implementation manners use related similar element numbers. In the following implementation manners, many detailed descriptions are provided to enable a better understanding of the present application. However, those skilled in the art can easily recognize that some of the features can be omitted in different situations, or can be replaced by other elements, materials, or methods. In some cases, some operations related to the present application are not shown or described in the specification, which is to avoid the core part of the present application being overwhelmed by excessive descriptions. For those skilled in the art, it is not necessary to describe these related operations in detail, and they can fully understand the related operations based on the description in the specification and the general technical knowledge in the art.
[0017] In addition, the features, operations, or characteristics described in the specification can be combined in any appropriate manner to form various implementation manners. At the same time, the steps or actions in the method description can also be reordered or adjusted in a manner obvious to those skilled in the art. Therefore, the various sequences in the specification and the drawings are only for clearly describing a certain embodiment and do not mean that they are the necessary sequences, unless it is stated that a certain sequence must be followed.
[0018] The serial numbers assigned to the components herein, such as "first", "second", etc., are only used to distinguish the described objects and do not have any sequential or technical meaning. The "connection" and "coupling" mentioned in the present application, unless otherwise specified, both include direct and indirect connection (coupling).
[0019] Please refer to Figures 1 to 12 , an embodiment of the present application provides an alignment jig assembly, including a substrate 1, an alignment piece 2, and other functional components that exist as needed. The following is a specific description.
[0020] In the substrate 1 of this embodiment, a first positioning portion 103 is provided. The first positioning portion 103 is used to limit the relative movement between the substrate 1 and the circuit board 3 of the encoder. The substrate 1 has a light-transmitting region; the alignment piece 2 is used to be fixed on the substrate 1 after position adjustment. A light-transmitting pattern 201 corresponding to the signal receiving region 301 on the circuit board 3 is provided on the alignment piece 2. The vertical projection of the light-transmitting pattern 201 on the substrate 1 is located within the contour of the light-transmitting region; the light-transmitting pattern 201 is used to correspond to the signal receiving region 301 and serves as an observation object for whether the position adjustment of the alignment piece 2 is in place when the alignment piece 2 is fixed; the light-transmitting pattern 201 is used to correspond to the code track on the code disk 7 and serves as an observation object for whether the position adjustment of the bracket 4 is in place during the assembly of the encoder.
[0021] It can be understood that the substrate 1 has a light-transmitting region. Specifically, the entire substrate 1 may be light-transmitting, or a partial region of the substrate 1 may be light-transmitting. The first positioning portion 103 on the substrate 1 may be, but is not limited to, a hole or a protruding shaft, or a plurality of limiting convex portions distributed circumferentially. The light-transmitting pattern 201 in this embodiment is a pattern with a certain shape on the alignment piece 2 through which light can pass. When the light-transmitting pattern 201 corresponds to the signal receiving region 301 on the circuit board 3, the fixing position of the alignment piece 2 on the substrate 1 can be adjusted according to the alignment relationship between the light-transmitting pattern 201 and the signal receiving region 301. For example, when the vertical projection of the light-transmitting pattern 201 on the circuit board 3 is aligned with the signal receiving region 301, the position adjustment of the alignment piece 2 is in place; when the light-transmitting pattern 201 corresponds to the code track on the code disk 7, the fixing position of the bracket 4 on the motor end cover 6 can be adjusted according to the alignment relationship between the light-transmitting pattern 201 and the code track. For example, when the vertical projection of the light-transmitting pattern 201 on the circuit board 3 is aligned with the code track, the position adjustment of the bracket 4 is in place. By using the light-transmitting pattern 201 that can be aligned with the signal receiving region 301 to adjust the position of the bracket 4, since the circuit board 3 is fixedly connected to the bracket 4, when the position of the bracket 4 is in place, the position adjustment of the circuit board 3 is also in place. Thus, the signal receiving region 301 on the circuit board 3 can be aligned with the code track on the code disk 7, which is beneficial to improving the detection accuracy of the encoder.
[0022] In one embodiment, such as Figure 1 、 Figure 4As shown, the light-transmitting area is provided with a through hole 101. The inner wall of the through hole 101 is provided with a flange 102 arranged circumferentially around the through hole 101. The alignment piece 2 is located within the through hole 101 and is disposed on the end face of the flange 102. A displacement space for adjusting the position of the alignment piece 2 is left on the end face of the flange 102. Placing the alignment piece 2 within the through hole 101 makes the assembly position of the alignment piece 2 clearer, facilitating rapid assembly. The flange 102 within the through hole 101 can position and support the alignment piece 2. In some embodiments, a plurality of protrusions arranged circumferentially around the through hole 101 can also be provided on the hole wall of the through hole 101 to position and support the alignment piece 2 through the plurality of protrusions. The displacement space in this embodiment is the displacement space when adjusting the fixed position of the alignment piece 2. In some embodiments, the light-transmitting area can be larger than the area of the through hole 101, and the through hole 101 mainly serves a positioning function. In some application scenarios, the light-transmitting area can also be formed through the through hole 101. For example, the substrate 1 is made of a non-transparent material, and only a part of the through hole 101 is light-transmitting to form the light-transmitting area. The alignment piece 2 is disposed within the through hole 101, thereby aligning the light-transmitting pattern 201 on the alignment piece 2 with the signal receiving area 301 or the code track. In some embodiments, the through hole 101 may not be provided on the substrate 1. For example, an annular boss matching the outer shape of the alignment piece 2 can be provided on the surface of the substrate 1, and the alignment piece 2 is fixed within the annular boss. A displacement space for adjusting the position of the alignment piece 2 is left between the annular boss and the alignment piece 2. In some embodiments, no positioning structure may be provided on the substrate 1, and the alignment piece 2 is directly placed on the surface of the substrate 1, and the fixed position of the alignment piece 2 is directly adjusted according to the signal receiving area 301 on the circuit board 3.
[0023] In one embodiment, the substrate 1 is a glass substrate 1, and the contour of the light-transmitting area is the outer contour of the glass substrate 1. When the substrate 1 is a glass substrate 1, the entire substrate 1 can be light-transmitting. At this time, the light-transmitting area covers the entire substrate 1. The glass substrate 1 can ensure light-transmitting property and also simplify the structure of the substrate 1. In some embodiments, the substrate 1 can also be partly made of a non-light-transmitting material and partly made of a light-transmitting material, and the part made of the light-transmitting material forms the light-transmitting area. In some embodiments, the substrate 1 can also be entirely made of a non-light-transmitting material, and through holes are provided on the substrate 1 to form a light-transmitting area through which light can pass.
[0024] In this embodiment, the fixing method of the alignment piece 2 on the substrate 1 can be achieved by, but not limited to, the following methods: Method 1: The substrate 1 is provided with an elastic pressing arm. One end of the elastic pressing arm is fixedly connected to the substrate 1 by a screw, and the other end is used to tightly fix the alignment piece 2 after the position of the alignment piece 2 is adjusted.
[0025] When fixing the alignment piece 2, after the alignment piece 2 is adjusted in place, it can be fixed by pressing the alignment piece 2 with the free end of the elastic pressing arm. The fixing of the alignment piece 2 is simple, and the alignment piece 2 and the substrate 1 can also be reused. In some embodiments, one end of the elastic pressing arm can be fixed to the substrate 1 by sequentially screwing the screw through the through hole provided on the fixed end of the elastic pressing arm and the threaded hole on the substrate 1. A bending part is provided between the free end and the fixed end of the elastic pressing arm, and a gap is left between the bending part and the surface of the substrate 1. This gap can facilitate pulling the elastic pressing arm during use so that a space for the alignment piece 2 to enter is formed between the free end of the elastic pressing arm and the substrate 1. The free end and the fixed end of the elastic pressing arm are arranged in a staggered manner. For example, the free end of the elastic pressing arm can be set closer to the substrate 1 relative to the fixed end. Thus, after the fixed end of the elastic pressing arm is connected and fixed to the substrate 1, a pre-pressure can be formed at the free end of the elastic pressing arm, and the alignment piece 2 can be pressed and fixed through this pre-pressure. In this embodiment, the free end of the elastic pressing arm is the end that presses the alignment piece 2, and the fixed end is the end connected to the substrate 1 opposite to the free end.
[0026] In some application scenarios, the fixed end of the elastic pressing arm can also be rotatably arranged, that is, the fixed end of the elastic pressing arm can rotate around the screw. When the alignment piece 2 is not adjusted in place, the free end of the elastic pressing arm does not contact the alignment piece 2. After the alignment piece 2 is adjusted in place, pull the free end of the elastic pressing arm to rotate the elastic pressing arm so that the free end of the elastic pressing arm presses the alignment piece 2 to fix the alignment piece 2. When there is no through hole provided on the substrate 1, the free end of the elastic pressing arm is directly pre-pressed on the surface of the substrate 1. When there is a through hole provided on the substrate 1, the fixed end of the elastic pressing arm can be fixed in the outer peripheral area of the through hole, and the free end of the elastic pressing arm extends into the through hole and is pre-pressed on the flange 102. The number of elastic pressing arms in this embodiment is not limited, as long as the alignment piece 2 can be pressed to form a fixation. For example, it can be two elastic pressing arms distributed on opposite sides, or four elastic pressing arms distributed at the four corners. The elastic pressing arm in this embodiment can be, but is not limited to, a metal material. The elastic pressing arm can press on the outer peripheral area of the alignment piece 2 to avoid covering the light-transmitting pattern 201 on the alignment piece 2.
[0027] Method 2: The substrate 1 is provided with an adhesive part for adhesively fixing to the alignment piece 2 after the position of the alignment piece 2 is adjusted. The adhesive fixing method is beneficial to improving the reliability of the fixation of the alignment piece 2 and can also simplify the structure of the substrate 1. When there is a through hole provided on the substrate 1 and the alignment piece 2 is arranged on the flange 102 in the through hole, the adhesive part is the end face of the flange 102. When there is no through hole provided on the substrate 1 and the alignment piece 2 is directly arranged on the surface of the substrate 1, the adhesive part is the surface of the substrate 1 that bears the alignment piece 2.
[0028] Method 3: A first magnetic attraction part is fixedly arranged on the substrate 1, and a second magnetic attraction part magnetically adsorbed on the first magnetic attraction part. The second magnetic attraction part is used to press and fix the alignment piece 2 through the adsorption force between it and the first magnetic attraction part after the position of the alignment piece 2 is adjusted. When fixing by magnetic attraction, the fixing operation of the alignment piece 2 is also simple. The magnetisms between the first magnetic attraction part and the second magnetic attraction part are different and can attract each other. In some embodiments, the first magnetic attraction part can be a magnetic body embedded in the substrate 1, and the second magnetic attraction part is a magnetic block adsorbed on the first magnetic attraction part. When setting, in order to avoid the magnetic attraction part blocking the light-transmitting pattern 201, the first magnetic attraction part can correspond to the outer peripheral area of the alignment piece 2, and the second magnetic attraction part presses the outer peripheral area of the alignment piece 2 to form the fixation of the alignment piece 2. In some embodiments, for example, when the substrate 1 is made of a metal material that can be magnetically adsorbed, a magnetic body may not be provided inside the substrate 1, and a magnet can be directly adsorbed on the substrate 1 to fix the alignment piece 2 as well.
[0029] In one embodiment, as Figure 2 , Figure 5 , Figure 10 shown, the light-transmitting pattern 201 includes a first pattern area 202 and a second pattern area 203 arranged in sequence along the radial direction. The first pattern area 202 is used to correspond to the position of the first signal receiving area 304 on the circuit board 3 and the first code track 701 on the code disk 7, and the second pattern area 203 is used to correspond to the position of the second signal receiving area 303 on the circuit board 3 and the second code track 702 on the code disk 7. The light-transmitting pattern 201 is provided with the first pattern area 202 and the second pattern area 203. When aligning, it is necessary to ensure that both pattern areas are aligned before the adjustment is in place, which is beneficial to further improving the position accuracy of the adjustment and the detection accuracy of the encoder.
[0030] In one embodiment, the first pattern area 202 has a plurality of first sub-patterns, the second pattern area 203 has a plurality of second sub-patterns, the first signal receiving area 304 has a plurality of first sub-receiving areas, the second signal receiving area 303 has a plurality of second sub-receiving areas. The first sub-patterns and the first sub-receiving areas are in one-to-one correspondence, and the shapes of the first sub-patterns and the corresponding first sub-receiving areas are the same; the second sub-patterns and the second sub-receiving areas are in one-to-one correspondence, and the shapes of the second sub-patterns and the corresponding second sub-receiving areas are the same. The first pattern area 202 has a plurality of first sub-patterns and the second pattern area 203 has a plurality of second sub-patterns. When aligning, it is necessary to ensure that each sub-pattern area is aligned before the adjustment is in place, which is beneficial to further improving the position accuracy of the adjustment, thereby further improving the detection accuracy of the encoder.
[0031] In some embodiments, the first sub-pattern and the first sub-receiving area may not be in a one-to-one correspondence. One first sub-pattern may correspond to multiple first sub-receiving areas, that is, the pattern of the first sub-pattern corresponds to the outer contour formed by the multiple first sub-receiving areas, and one second sub-pattern corresponds to multiple second sub-receiving areas, that is, the pattern of the second sub-pattern corresponds to the outer contour formed by the multiple second sub-receiving areas. For example, one first sub-pattern may correspond to two, three or four first sub-receiving areas, and one second sub-pattern may correspond to two, three or four second sub-receiving areas. In some embodiments, the light-transmitting pattern 201 may also be provided with only one pattern area, and the pattern area is provided with multiple sub-pattern areas, each sub-pattern area corresponds to the first sub-receiving area one-to-one, or each sub-pattern area corresponds to the second sub-receiving area one-to-one.
[0032] In one embodiment, Figure 3 As shown, a boss structure 104 is provided in the peripheral area of the front end face of the substrate 1, and the boss structure 104 is used to contact and support the substrate 1 with the circuit board 3. With the support of the boss structure 104, a clearance space can be formed between the substrate 1 and the circuit board 3, and the devices on the circuit board 3 can be located in the clearance space, which is conducive to avoiding interference. In some embodiments, the boss structure 104 can be an annular boss, or it can be a plurality of bosses distributed in a ring shape. The front end face of the substrate 1 in this embodiment is the surface close to the side of the circuit board 3 when the alignment piece 2 is fixed, and the rear end face of the substrate 1 is the surface away from the side of the circuit board 3 when the alignment piece 2 is fixed. In order to facilitate the position adjustment of the alignment piece 2, the alignment piece 2 in this embodiment can be fixed on the rear end face of the substrate 1.
[0033] The alignment piece 2 of the alignment jig assembly of the above-mentioned embodiment is provided with a light-transmitting pattern 201. During assembly, the fixed position of the alignment piece 2 on the substrate 1 can be adjusted according to the alignment between the light-transmitting pattern 201 and the signal receiving area 301. After the alignment piece 2 is fixed, the substrate 1 and the bracket 4 are fixed. According to the alignment between the light-transmitting pattern 201 and the code channel on the code disk 7, the fixed position of the bracket 4 on the end cover 6 is adjusted. After the fixed position of the bracket 4 is adjusted, the signal receiving area 301 on the circuit board 3 fixed on the bracket 4 can be aligned with the code channel on the code disk 7, which is beneficial to improve the detection accuracy of the encoder.
[0034] See also Figures 1 to 12, an embodiment of the present application further provides an encoder assembly, including: a bracket 4, a circuit board 3, a code disk 7, and the alignment fixture assembly as described above; the code disk 7 is provided with code tracks, and the code disk 7 is used to be fixed on the rotating shaft of the motor; the bracket 4 is used to be fixedly installed on the end cover 6 of the motor, the circuit board 3 is used to be fixedly installed on the bracket 4, the substrate 1 is used to be detachably connected to the bracket 4, the circuit board 3 is provided with a second positioning portion 302 corresponding to the first positioning portion 103, and the bracket 4 is provided with a third positioning portion corresponding to the first positioning portion 103 and the second positioning portion 302. The third positioning portion is used to cooperate with the first positioning portion 103 and the second positioning portion 302 when fixing the alignment piece 2 to limit the relative movement between the circuit board 3 and the substrate 1. The third positioning portion is also used to cooperate with the first positioning portion 103 when positioning the installation position of the bracket 4 to limit the relative movement between the bracket 4 and the substrate 1. The third positioning portion is also used to cooperate with the second positioning portion 302 when fixedly installing the circuit board 3 to limit the relative movement between the bracket 4 and the circuit board 3.
[0035] It can be understood that the alignment fixture assembly in this embodiment is the same as that in the above embodiment, and will not be described in detail here. The first positioning portion 103, the second positioning portion 302, and the third positioning portion in this embodiment correspond to each other. Through the mutual correspondence between the first positioning portion 103, the second positioning portion 302, and the third positioning portion, the positional correspondence between the substrate 1, the circuit board 3, and the bracket 4 can be ensured. That is, through the cooperation between the first positioning portion 103, the second positioning portion 302, and the third positioning portion, it not only has the function of connecting the bracket 4, the substrate 1, and the circuit board 3, but also has the function of aligning the relative positions between the bracket 4, the substrate 1, and the circuit board 3. The third positioning portion cooperates with the first positioning portion 103 and the second positioning portion 302 when fixing the alignment piece 2 to limit the relative movement between the circuit board 3 and the substrate 1. That is, by connecting the third positioning portion with the first positioning portion 103 and the second positioning portion 302, the substrate 1 and the circuit board 3 can be fixed. At this time, the fixing position of the alignment piece 2 on the substrate 1 can be adjusted according to the alignment relationship between the light-transmitting pattern 201 and the signal receiving area 301. The third positioning portion can cooperate with the first positioning portion 103 when positioning the installation position of the bracket 4 to limit the relative movement between the bracket 4 and the substrate 1. That is, connecting the third positioning portion with the first positioning portion 103 can fix the bracket 4 and the substrate 1. At this time, the installation position of the bracket 4 can be adjusted according to the alignment relationship between the light-transmitting pattern 201 and the code tracks. The third positioning portion can also cooperate with the second positioning portion 302 when fixedly installing the circuit board 3 to limit the relative movement between the bracket 4 and the circuit board 3. That is, connecting the third positioning portion with the second positioning portion 302 can fix the bracket 4 and the circuit board 3. Since the position of the bracket 4 has been adjusted, fixing the circuit board 3 on the bracket 4 can achieve the alignment between the signal receiving area 301 on the circuit board 3 and the code tracks on the code disk 7.
[0036] In one embodiment, such asFigure 8 , Figures 10 to 12 As shown in Figures 10 to 12 , the third positioning part includes at least two positioning pins 5, the first positioning part 103 includes at least two first through holes, the second positioning part 302 includes second through holes corresponding to the first through holes. The positioning pins 5 are used to insert into the first through holes and the second through holes when fixing the alignment piece 2 to limit the relative movement between the substrate 1 and the circuit board 3, to insert into the first through holes when positioning the installation position of the positioning bracket 4 to limit the relative movement between the bracket 4 and the substrate 1, and to insert into the second through holes when fixedly installing the circuit board 3 to limit the relative movement between the circuit board 3 and the bracket 4. Through the cooperation of the positioning pins 5 with the first through holes and the second through holes, the mutual positions of the bracket 4, the substrate 1, and the circuit board 3 can be fixed, and the operation is also simple. The positioning pins 5 in this embodiment can be fixedly connected to the bracket 4. For example, the positioning pins 5 and the bracket 4 are integrally provided, or the bracket 4 is provided with holes, and the positioning pins 5 are press-fitted into the holes. In some embodiments, the positioning pins 5 can also be detachably arranged on the bracket 4. For example, the bracket 4 is provided with holes, and the positioning pins 5 are clearance-fitted in the holes. After the circuit board 3 is fixedly installed on the bracket 4, the positioning pins 5 can be removed.
[0037] In some embodiments, the first positioning part 103, the second positioning part 302, and the third positioning part can also be other structures. For example, the third positioning part can be a hole structure provided on the bracket 4, the first positioning part 103 is a hollow shaft structure provided on the substrate 1, and the second positioning part 302 is a hollow shaft structure provided on the circuit board 3. The hollow shaft on the substrate 1 is inserted into the hole structure of the bracket 4, and the hollow shaft on the circuit board 3 is inserted into the hollow shaft on the substrate 1, so that the mutual fixation between the bracket 4, the substrate 1, and the circuit board 3 can be formed. In some embodiments, the first positioning part 103, the second positioning part 302, and the third positioning part can all be corresponding hole structures, and an additional positioning shaft is used to insert into the first positioning part 103, the second positioning part 302, and the third positioning part to form the mutual fixation between the bracket 4, the substrate 1, and the circuit board 3. In some embodiments, when adjusting the position of the alignment piece 2, additional components can also be used to fix the substrate 1 and the circuit board 3.
[0038] In the encoder assembly of the above embodiment, the alignment piece 2 of the alignment jig assembly is provided with a light-transmitting pattern 201. During assembly, the fixed position of the alignment piece 2 on the substrate 1 can be adjusted according to the alignment situation between the light-transmitting pattern 201 and the signal receiving area 301. After the alignment piece 2 is fixed, the substrate 1 and the bracket 4 are fixed. According to the alignment situation between the light-transmitting pattern 201 and the code track on the code disk 7, the fixed position of the bracket 4 on the end cover 6 is adjusted. After the fixed position of the bracket 4 is adjusted, the signal receiving area 301 on the circuit board 3 fixed on the bracket 4 can be aligned with the code track on the code disk 7, which is beneficial to improving the detection accuracy of the encoder.
[0039] Please refer toFigure 13 , an embodiment of the present application also provides a method for manufacturing an encoder, including the following steps: S1: Provide an encoder component.
[0040] The encoder component in this embodiment is the same as that in the above embodiment, and will not be elaborated here.
[0041] S2: Through the cooperation of the first positioning portion, the second positioning portion, and the third positioning portion, position the substrate on the circuit board.
[0042] In one example, as Figure 8 shown, when the first positioning portion 103 is a first through hole, the second positioning portion 302 is a second through hole, and the third positioning portion is a positioning pin 5, the positioning pin 5 on the bracket 4 can pass through the first through hole and the second through hole to position the substrate 1 and the circuit board 3 on the bracket 4. At this time, the positions between the substrate 1 and the circuit board 3 are fixed, providing implementation conditions for the next step. Specifically, as Figure 9 shown, the substrate 1 can be positioned between the bracket 4 and the circuit board 3. At this time, the rear end surface of the substrate 1 is exposed from the central hole of the bracket 4, and the position of the alignment piece 2 is adjusted from one side of the bracket 4. Or it can also be as Figure 8 shown, the circuit board 3 is positioned between the bracket 4 and the substrate 1, and the rear end surface of the substrate 1 is located on the side of the substrate 1 away from the bracket 4.
[0043] S3: Place the alignment piece on the light-transmitting area of the substrate, and adjust the position of the alignment piece until the vertical projection of the light-transmitting pattern on the circuit board is aligned with the signal receiving area. After alignment, fix the alignment piece on the substrate.
[0044] In this embodiment, after alignment, as Figure 6 shown. The alignment piece 2 in this embodiment can be arranged in the through hole 101 of the substrate 1 and fixed on the flange 102 in the through hole 101 by bonding.
[0045] S4: Fix the code disk on the rotating shaft of the motor, and pre-fix the bracket on the end cover of the motor.
[0046] After the bracket 4 is pre-fixed, as Figure 10 shown, the pre-fixation in this embodiment means that the bracket 4 is connected to the end cover 6 through a connecting member but not completely fixed, leaving room for the bracket 4 to be adjusted and displaced. This embodiment does not limit the pre-fixation method of the code disk 7 on the rotating shaft of the motor, and any method that can be realized is acceptable.
[0047] S5: Through the cooperation of the first positioning portion and the third positioning portion, position the substrate with the alignment piece fixed on the bracket, adjust the position of the bracket on the end cover until the vertical projection of the light-transmitting pattern on the code disk is aligned with the code track. After alignment, remove the substrate and fix the bracket on the end cover.
[0048] In one example, as Figure 11 shown, when the first positioning portion 103 is a first through hole and the third positioning portion is the positioning pin 5, the positioning pin 5 can be inserted into the first through hole to position the substrate 1 on the bracket 4.
[0049] S6: Fix the circuit board to the bracket by the cooperation of the second positioning portion and the third positioning portion.
[0050] After the circuit board 3 is fixed, as Figure 12 shown, in one example, when the second positioning portion 302 is a second through hole and the third positioning portion is the positioning pin 5, the positioning pin 5 can be inserted into the second through hole, and the circuit board 3 is then positioned on the bracket 4. After positioning, the circuit board 3 is fixedly installed on the bracket 4 by screw connection or other connection means. In this embodiment, since the alignment piece 2 is adjusted in position according to the signal receiving area 301 on the circuit board 3, and then the installation position of the bracket 4 relative to the code disk 7 is adjusted according to the adjusted alignment piece 2, the installation position of the bracket 4 is also the installation position of the circuit board 3, whereby the mutual position adjustment between the circuit board 3 and the code disk 7 can be achieved.
[0051] In the manufacturing method of the encoder provided in the above embodiment, the alignment jig assembly of the encoder assembly is used to adjust the installation position of the circuit board 3 during the assembly process. According to the alignment situation between the light-transmitting pattern 201 provided on the alignment piece 2 and the signal receiving area 301 during the assembly, the fixed position of the alignment piece 2 on the substrate 1 is adjusted. After the alignment piece 2 is fixed, the substrate 1 and the bracket 4 are fixed, and the fixed position of the bracket 4 on the end cover 6 is adjusted according to the alignment situation between the light-transmitting pattern 201 and the code track on the code disk 7. After the fixed position of the bracket 4 is adjusted, the signal receiving area 301 on the circuit board 3 fixed on the bracket 4 can be aligned with the code track on the code disk 7, which is beneficial to improving the detection accuracy of the encoder.
[0052] The above uses specific examples to elaborate on the present application, which is only used to help understand the present application and is not intended to limit the present application. For those skilled in the technical field to which the present application belongs, based on the idea of the present application, several simple deductions, deformations or substitutions can also be made.
Claims
1. A positioning fixture assembly, characterized in that: include: A substrate, wherein a first positioning portion is provided on the substrate, and the first positioning portion is used to limit the relative movement between the substrate and a circuit board of an encoder, and the substrate has a light-transmitting area; An alignment piece, wherein the alignment piece is used to be fixed on the substrate after position adjustment, and the alignment piece is provided with a light-transmitting pattern corresponding to the position of the signal receiving area on the circuit board, and the vertical projection of the light-transmitting pattern on the substrate is located within the outline of the light-transmitting area; the light-transmitting pattern is used to correspond to the signal receiving area, and serves as an object of observation to determine whether the position of the alignment piece is in place when the alignment piece is fixed; the light-transmitting pattern is used to correspond to the code channel on the code disk, and serves as an object of observation to determine whether the position of the bracket is in place when the encoder is assembled.
2. The alignment fixture assembly according to claim 1, characterized in that: The light-transmitting area is provided with a through hole, the inner wall of the through hole is provided with a flange arranged circumferentially around the through hole, the alignment piece is located in the through hole and is arranged on the end face of the flange, and the end face of the flange leaves a displacement space for adjusting the position of the alignment piece.
3. The alignment fixture assembly according to claim 1, characterized in that: The substrate is a glass substrate, and the outline of the light-transmitting area is the outer peripheral outline of the glass substrate.
4. The alignment fixture assembly according to claim 1, characterized in that: An elastic pressure arm is provided on the base plate, one end of the elastic pressure arm is fixedly connected to the base plate by a screw, and the other end is used to press and fix the alignment sheet after the position of the alignment sheet is adjusted; Or, a bonding portion is provided on the substrate, and the bonding portion is used to bond and fix to the alignment sheet after the position of the alignment sheet is adjusted; Alternatively, a first magnetic attraction portion and a second magnetic attraction portion magnetically adsorbed on the first magnetic attraction portion are fixedly provided on the substrate, and the second magnetic attraction portion is used to press and fix the alignment plate through the adsorption force between the second magnetic attraction portion and the first magnetic attraction portion after the position of the alignment plate is adjusted.
5. The alignment fixture assembly according to any one of claims 1 to 4, characterized in that: The light-transmitting pattern includes a first pattern area and a second pattern area arranged in sequence along the radial direction, the first pattern area is used to correspond to the position of the first signal receiving area on the circuit board and the first code channel on the code disk, and the second pattern area is used to correspond to the position of the second signal receiving area on the circuit board and the second code channel on the code disk.
6. The alignment fixture assembly according to claim 5, characterized in that: The first pattern area has multiple first sub-patterns, the second pattern area has multiple second sub-patterns, the first signal receiving area has multiple first sub-receiving areas, the second signal receiving area has multiple second sub-receiving areas, the first sub-patterns correspond one-to-one to the first sub-receiving areas, and the first sub-patterns have the same shape as the corresponding first sub-receiving areas; the second sub-patterns correspond one-to-one to the second sub-receiving areas, and the second sub-patterns have the same shape as the corresponding second sub-receiving areas.
7. The alignment fixture assembly according to any one of claims 1 to 4, characterized in that: A boss structure is arranged in the peripheral area of the front end surface of the substrate, and the boss structure is used for contacting with the circuit board to support the substrate.
8. An encoder assembly, characterized in that: include: A bracket, a circuit board, a code disc, and an alignment fixture assembly as described in any one of claims 1 to 7; The code disc is provided with a code track, and the code disc is used to be fixed on the rotating shaft of the motor; The bracket is used to be fixedly mounted on the end cover of the motor, the circuit board is used to be fixedly mounted on the bracket, the substrate is used to be detachably connected to the bracket, the circuit board is provided with a second positioning portion corresponding to the first positioning portion, the bracket is provided with a third positioning portion corresponding to the first positioning portion and the second positioning portion, the third positioning portion is used to cooperate with the first positioning portion and the second positioning portion when fixing the alignment piece to limit the relative movement between the circuit board and the substrate, the third positioning portion is also used to cooperate with the first positioning portion when positioning the mounting position of the bracket to limit the relative movement between the bracket and the substrate, and the third positioning portion is also used to cooperate with the second positioning portion when fixedly mounting the circuit board to limit the relative movement between the bracket and the circuit board.
9. The encoder assembly according to claim 8, characterized in that The third positioning portion includes at least two positioning pins, the first positioning portion includes at least two first through holes, and the second positioning portion includes a second through hole corresponding to the first through hole. The positioning pin is used to be inserted into the first through hole and the second through hole when fixing the alignment piece to limit the relative movement between the substrate and the circuit board, and is used to be inserted into the first through hole when positioning the bracket installation position to limit the relative movement between the bracket and the substrate, and is used to be inserted into the second through hole when fixing the circuit board to limit the relative movement between the circuit board and the bracket.
10. A method for manufacturing an encoder, characterized in that: include: Providing an encoder assembly as claimed in claim 9 or 10; Positioning the substrate on the circuit board through the cooperation of the first positioning portion, the second positioning portion and the third positioning portion; Placing the alignment sheet on the light-transmitting area of the substrate, adjusting the position of the alignment sheet until the vertical projection of the light-transmitting pattern on the circuit board is observed to be aligned with the signal receiving area, and fixing the alignment sheet on the substrate after alignment; The code disc is fixed on the rotating shaft of the motor, and the bracket is pre-fixed on the end cover of the motor; The substrate with the alignment sheet fixed thereon is positioned on the bracket by cooperating with the first positioning portion and the third positioning portion, and the position of the bracket on the end cover is adjusted until the vertical projection of the light-transmitting pattern on the code disk is observed to be aligned with the code track. After alignment, the substrate is removed and the bracket is fixed on the end cover; The circuit board is fixed on the bracket by the cooperation between the second positioning portion and the third positioning portion.