Split encoder, motor and auxiliary tooling

Abstract

This invention discloses a split-type encoder, a motor, and auxiliary tooling. The split-type encoder includes an encoder body with a receiving cavity, a grating assembly, and a positioning assembly. The outer wall of the encoder body has multiple mounting holes communicating with the receiving cavity. The grating assembly is located inside the receiving cavity and spaced apart from the inner wall of the cavity. The grating assembly includes a rotating shaft and a code disk disposed on the rotating shaft. Multiple positioning surfaces are formed on the outer peripheral wall of the rotating shaft, spaced circumferentially along the rotating shaft. The number of positioning surfaces is the same as the number of mounting holes and corresponds one-to-one. The positioning surfaces are planar. The positioning assembly is used to fix the grating assembly. The positioning assembly includes multiple positioning elements, the same number as the number of mounting holes and corresponding one-to-one. Each positioning element passes through a corresponding mounting hole and abuts against a corresponding positioning surface. According to the embodiments of the present invention, the split-type encoder has simple and reliable positioning, is easy to install and transport, can ensure measurement accuracy, and prevents contamination of the grating assembly.

Description

Technical Field

[0001] This invention relates to the field of encoders, and more particularly to a split encoder, motor, and auxiliary tooling. Background Technology

[0002] In related technologies, the grating assembly and housing assembly of a split encoder are packaged separately and shipped to the customer. The customer needs to install these two assemblies onto the motor separately. During installation, compensation and correction actions are required to adjust the gap between the grating assembly and the housing assembly. This gap control can be achieved using specialized tooling to control the height of the grating assembly, ensuring the encoder's measurement accuracy. However, the installation accuracy requirements for the grating assembly and housing assembly are high. High-precision specialized tooling is needed when installing the encoder on the motor end. Over time, wear on this specialized tooling can affect the encoder's output accuracy, increase assembly difficulty, and the required installation accuracy is unlikely to be met. Insufficient installation accuracy will affect the measurement accuracy of the split encoder. Furthermore, the grating assembly is exposed to the environment during installation, making it susceptible to contamination. This places high demands on the assembly environment, and encoder calibration and compensation are required after assembly, increasing production time. Summary of the Invention

[0003] The present invention aims to at least solve one of the technical problems existing in the prior art. To this end, one object of the present invention is to provide a split encoder that is installed as a whole. By setting a positioning surface and setting the positioning surface as a plane, the contact area between a single positioning component and the rotating shaft can be increased, thereby improving the reliability of the positioning assembly in fixing the rotating shaft. Moreover, the positioning is simple, easy to install and transport, and can ensure measurement accuracy and prevent the grating assembly from being contaminated.

[0004] The present invention also proposes a motor having the above-mentioned split encoder.

[0005] The present invention also proposes an auxiliary tooling for assembling a split encoder.

[0006] According to a first aspect of the present invention, an integrally mounted split encoder includes: an encoder body having a receiving cavity, the outer wall of the encoder body having a plurality of mounting holes communicating with the receiving cavity; a grating assembly located within the receiving cavity and spaced apart from the inner wall of the receiving cavity, the grating assembly including a rotating shaft and a code disk disposed on the rotating shaft, the outer peripheral wall of the rotating shaft having a plurality of positioning surfaces arranged circumferentially along the rotating shaft, the number of positioning surfaces being the same as the number of mounting holes and corresponding one-to-one, the positioning surfaces being planar; and a positioning component for fixing the grating assembly, the positioning component including a plurality of positioning members, the number of positioning members being the same as the number of mounting holes and corresponding one-to-one, each positioning member passing through the corresponding mounting hole and abutting against the corresponding positioning surface.

[0007] According to embodiments of the present invention, the split encoder, by setting a positioning surface and making the positioning surface planar, can increase the contact area between a single positioning component and the rotating shaft, improve the reliability of the positioning assembly in fixing the rotating shaft, and simplify positioning. By fixing the grating assembly to the encoder body using the positioning assembly, the split encoder can be installed or transported as a whole, preventing contamination of the grating assembly, reducing the transport space occupied by the split encoder during transportation, and ensuring that the relative positional relationship between the grating assembly and the encoder body remains unchanged, thus guaranteeing the measurement accuracy of the split encoder. This also makes installation convenient and efficient.

[0008] According to some embodiments of the present invention, the positioning surfaces are two radially opposite to each other along the rotation axis, and the two positioning surfaces are arranged in parallel.

[0009] According to some embodiments of the present invention, the positioning surface is parallel to the central axis of the rotation axis.

[0010] According to some embodiments of the present invention, the surface of the positioning member that abuts against the corresponding positioning surface is a contact surface, the contact surface is a plane, and the contact surface is parallel and fits the corresponding positioning surface.

[0011] According to some embodiments of the present invention, the positioning element is threadedly connected to the inner peripheral wall of the mounting hole.

[0012] According to some embodiments of the present invention, the mounting hole includes a first hole segment and a second hole segment arranged axially and communicating with each other along the mounting hole. The first hole segment is located radially outside the second hole segment, and the inner diameter of the first hole segment is larger than the inner diameter of the second hole segment. The positioning member is adapted to pass through the first hole segment and be threadedly connected to the inner peripheral wall of the second hole segment.

[0013] According to some embodiments of the present invention, a plurality of fixing holes are formed on the rotating shaft at circumferential intervals along the rotating shaft, the fixing holes being spaced apart from the positioning surface, and the second fastener being adapted to pass through the fixing holes and abut against or connect to the outer peripheral wall of the motor shaft.

[0014] In some embodiments of the present invention, an mounting notch is formed on the outer wall of the encoder body, at least the head of the first fastener is accommodated in the mounting notch, and the post portion of the first fastener is adapted to pass through the encoder body and the motor housing.

[0015] In some embodiments of the present invention, the mounting notch is formed on the outer peripheral wall of the encoder body and extends through two axially opposite end faces of the encoder body.

[0016] In some embodiments of the present invention, a fixing hole spaced apart from the positioning surface is formed on the rotating shaft, and the second fastener is adapted to pass through the fixing hole and abut against or connect with the outer peripheral wall of the motor shaft. The mounting notch penetrates the inner peripheral wall of the receiving cavity. During the process of installing the split encoder onto the motor body, the second fastener is adapted to be installed into the fixing hole through the mounting notch.

[0017] According to a second aspect of the present invention, a motor includes: a motor body, the motor body including a motor housing and a motor shaft; and a split encoder, the split encoder being a split encoder according to the first aspect of the present invention described above, wherein the encoder body is fixed to the motor housing, the motor shaft passes through the mounting hole and is connected to the grating assembly, and the grating assembly is fixed relative to the motor shaft.

[0018] According to the embodiments of the present invention, by providing the above-mentioned split encoder, the installation of the motor can be made more convenient and the installation efficiency of the motor can be improved.

[0019] According to a third aspect of the present invention, an auxiliary tooling is used for assembling a split encoder according to the first aspect of the present invention, characterized in that the auxiliary tooling includes: a support base having a first support surface and a second support surface, the first support surface being located on the outer periphery of the second support surface; and a positioning post disposed on the support base, the first support surface being located on the outer periphery of the positioning post; wherein, during the assembly of the split encoder using the auxiliary tooling, the encoder body abuts against and is supported on the first support surface, the rotating shaft abuts against and is supported on the second support surface, and the positioning post is adapted to be inserted into a mating hole of the rotating shaft.

[0020] According to the auxiliary tooling of the present invention, by using the auxiliary tooling to assemble the split encoder, the auxiliary tooling can accurately position the grating assembly in the encoder body, ensuring the installation accuracy of the grating assembly and the encoder body, ensuring the measurement accuracy of the split encoder, improving the installation efficiency and installation accuracy of the split encoder, and reducing production costs.

[0021] Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0022] The above and / or additional aspects and advantages of the present invention will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0023] Figure 1 This is a perspective view of a split encoder according to an embodiment of the present invention;

[0024] Figure 2 yes Figure 1 A three-dimensional view of the split encoder from another perspective;

[0025] Figure 3 yes Figure 1 Main view of the split encoder in the image;

[0026] Figure 4 yes Figure 1 A bottom view of the split encoder in the image;

[0027] Figure 5 yes Figure 1 A top view of the split encoder in the image;

[0028] Figure 6 yes Figure 5 Sectional view along line AA;

[0029] Figure 7 yes Figure 5 Sectional view along line BB;

[0030] Figure 8 yes Figure 5 Sectional view along line CC;

[0031] Figure 9 yes Figure 5 A 3D view of the grating components in the image;

[0032] Figure 10 yes Figure 1 A cross-sectional view of a split encoder assembled with a motor.

[0033] Figure 11 yes Figure 1A cross-sectional view of the split encoder assembled with auxiliary tooling.

[0034] Figure 12 yes Figure 11 A sectional view of the auxiliary tooling in the diagram.

[0035] Figure label:

[0036] 100. Electric motor;

[0037] 10. Split-type encoder;

[0038] 1. Encoder body;

[0039] 11. Light source;

[0040] 12. Circuit board assembly; 121. Circuit board; 1211. Mounting clearance hole; 122. Photoelectric converter;

[0041] 13. Outer shell; 131. Receiving cavity; 132. Mounting port; 133. Mounting hole; 1331. First hole section; 134. Mounting notch; 1341. Main notch; 135. Receiving groove; 136. Through hole; 137. Fastening arm;

[0042] 2. Grating assembly;

[0043] 21. Code disk;

[0044] 22. Rotating shaft; 221. Fixing hole; 222. Mating hole; 223. Positioning surface; 224. Flange;

[0045] 31. Positioning component; 311. Contact surface;

[0046] 41. First fastener; 411. Head; 412. Post; 42. Second fastener; 43. Third fastener;

[0047] 5. Motor body; 51. Motor housing; 511. Fastening hole; 52. Motor shaft;

[0048] 90. Auxiliary tooling; 91. Positioning column; 92. Support base; 921. First support surface; 922. Second support surface. Detailed Implementation

[0049] Embodiments of the present invention are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0050] The following description, with reference to the accompanying drawings, describes an integrally mounted split encoder 10 according to an embodiment of the present invention;

[0051] Reference Figure 1 , Figure 8 and Figure 10 According to an embodiment of the first aspect of the present invention, a split encoder 10 is integrally mounted. The split encoder 10 can be used in a motor 100 to detect the rotation angle of the motor shaft 52 of the motor 100. The split encoder 10 can also be used in a transmission device (e.g., a conveyor belt device) to detect the rotation angle of the transmission shaft of the transmission device, thereby detecting the transmission distance of the transmission device. The split encoder 10 includes an encoder body 1, a grating assembly 2, and a positioning assembly. The encoder body 1 has a receiving cavity 131. The outer wall of the encoder body 1 has a mounting opening 132 and mounting holes 133. The mounting opening 132 communicates with the receiving cavity 131, and there are multiple mounting holes 133 communicating with the receiving cavity 131.

[0052] It should be explained that, in the description of this invention, "a plurality of" means two or more.

[0053] The grating assembly 2 is located within the receiving cavity 131, and is spaced apart from the inner wall of the receiving cavity 131. The grating assembly 2 and the encoder body 1 are in a separate structure and do not contact each other. The grating assembly 2 includes a rotating shaft 22 and a code disk 21. The code disk 21 is located on the rotating shaft 22. The mounting port 132 is located on one axial side of the rotating shaft 22. Multiple positioning surfaces 223 are formed on the outer peripheral wall of the rotating shaft 22. The multiple positioning surfaces 223 are arranged at intervals along the circumference of the rotating shaft 22. The number of positioning surfaces 223 is the same as the number of mounting holes 133 and corresponds one-to-one. The positioning surfaces 223 are planar. For example, the rotating shaft 22 has a mating hole 222. When the separate encoder 10 is used in the motor 100, the motor shaft 52 is adapted to be inserted into the mating hole 222 of the rotating shaft 22. When the motor 100 is working, the motor shaft 52 is adapted to drive the grating assembly 2 to rotate relative to the encoder body 1.

[0054] The positioning component is used to fix the grating assembly 2. The positioning component includes multiple positioning elements 31. The number of positioning elements 31 is the same as the number of mounting holes 133 and corresponds one-to-one. Each positioning element 31 passes through the corresponding mounting hole 133 and abuts against the corresponding positioning surface 223. When the positioning element abuts against the positioning surface 223, the grating assembly 2 is fixed at a preset position relative to the encoder body 1. At this time, the positional relationship between the grating assembly 2 and the encoder body 1 satisfies the installation accuracy of the grating assembly 2 and the encoder body 1.

[0055] When assembling the split encoder 10, the grating assembly 2 can be placed into the receiving cavity 131 of the encoder body 1. The gap between the grating assembly 2 and the inner wall of the receiving cavity 131 can be adjusted by adjusting the mounting port 132. The relative position of the positioning surface 223 and the mounting hole 133 can be adjusted. The positioning surface 223 on the rotating shaft 22 corresponds one-to-one with the mounting hole 133. When the fixed position of the grating assembly 2 relative to the encoder body 1 is the preset position, the positioning member 31 is inserted into the mounting hole 133. One end of the positioning member 31 is abutted against the corresponding positioning surface 223 to fix the grating assembly 2 relative to the encoder body 1.

[0056] The following description uses a split encoder 10 for use with a motor 100. The motor 100 may include a motor body 5 and a split encoder 10. The motor body 5 includes a motor housing 51, a motor shaft 51, and a stator. When assembling the motor 100, the split encoder 10 is installed as a whole. For example, the mating hole 222 can be aligned with the motor shaft 52, the motor shaft 52 can be inserted into the mating hole 222, and then the rotating shaft 22 can be fixed to the motor shaft 52. The encoder body 1 can be fixed to the stator of the motor 100 or fixed to the motor housing 51 of the motor 100. When the encoder body 1 is fixed relative to the motor housing 51 of the motor 100, and the motor shaft 52 of the motor 100 is fixed relative to the rotating shaft 22, the positioning component can be removed from the encoder body 1 to complete the installation.

[0057] By using the positioning component to fix the grating assembly 2 relative to the encoder body 1, the split encoder 10 can be installed as a whole. There is no need to adjust and correct the relative positional relationship between the grating assembly 2 and the encoder body 1 when assembling the motor 100. The installation is simple and can improve assembly efficiency.

[0058] The separate encoder 10 is installed as a whole, which can avoid damage to the code disk 21 caused by secondary positioning and adjustment. Moreover, the code disk 21 is always in the receiving cavity 131 of the encoder body 1, which can reduce or avoid damage to the code disk 21 caused by complex installation and debugging, such as contamination and electrostatic damage. This makes the installation process less demanding on the assembly environment, allowing the separate encoder 10 to adapt to more complex assembly environments.

[0059] This also eliminates the need for separate packaging and transportation of the grating assembly 2 and the encoder body 1. Instead, the grating assembly 2 and the encoder body 1 can be packaged as a whole, reducing the workload of packaging personnel and the transportation space occupied by the split encoder 10 during transportation.

[0060] By setting the positioning surface 223 and making it a plane, the contact area between the individual positioning component 31 and the rotating shaft 22 can be increased, improving the reliability of the positioning assembly in fixing the rotating shaft 22. After the positioning component 31 fixes the grating assembly 2 relative to the encoder body 1, during the transportation of the split encoder 10, this can reduce the amount of displacement of the grating assembly 2 relative to the encoder body 1 caused by the bumps of the split encoder 10, or prevent the grating assembly 2 relative to the encoder body 1 from sliding due to the bumps of the split encoder 10, so that the internal relative positional relationship between the grating assembly 2 and the encoder body 1 remains unchanged, and the grating assembly 5 and the encoder body 1 always maintain their original installation accuracy, thereby ensuring the measurement accuracy of the split encoder 10.

[0061] When the split encoder 10 is installed as a whole onto the motor body 5, this can reduce the amount of displacement of the grating assembly 2 relative to the encoder body 1 caused by the grating assembly 2 hitting the motor shaft 52, or prevent the grating assembly 2 from sliding relative to the encoder body 1 due to the grating assembly 2 hitting the motor shaft 52. This keeps the internal relative positional relationship between the grating assembly 2 and the encoder body 1 unchanged, and ensures that the grating assembly 5 and the encoder body 1 always maintain the original installation accuracy, thereby guaranteeing the measurement accuracy of the split encoder 10.

[0062] For example, refer to Figures 6-11 The encoder body 1 may include a circuit board assembly 12, a housing 13 and a light source 11. One axial side of the housing 13 is open to form an opening. The circuit board assembly 12 covers the opening of the housing 13 and defines a receiving cavity 131 between the circuit board assembly 12 and the housing 13. A mounting port 132 is formed on the other axial side of the housing 13. A plurality of mounting holes 133 are formed on the peripheral wall of the housing 13 and penetrate the peripheral wall of the housing 13. The plurality of mounting holes 133 are spaced apart along the circumference of the housing 13.

[0063] The code disk 21 is connected to one side of the rotating shaft 22 adjacent to the circuit board assembly 12. The circuit board assembly 12 includes a circuit board 121 and a photoelectric converter 122. The photoelectric converter 122 is disposed on the circuit board 121. The housing 13 also has a receiving groove 135, in which a light source 11 is disposed. The receiving groove 135 can be formed on the other side of the housing 13 along the axial direction. The receiving groove 135 communicates with the receiving cavity 131 in the axial direction. The light source 11 and the photoelectric converter 122 are arranged opposite each other in the axial direction. When the positional relationship between the code disk 21 and the photoelectric converter 122 meets the installation accuracy, the gap between the code disk 21 and the photoelectric converter 122 is a preset value H.

[0064] When assembling the split encoder 10, the grating assembly 2 can be placed into the receiving cavity 131 first, and the circuit board assembly 12 can be placed over the open opening of the outer casing 13. The relative position of the positioning surface 223 and the mounting hole 133 can be adjusted by adjusting the gap between the code disk 21 and the photoelectric converter 122 through the mounting port 132. The positioning surfaces 223 on the rotating shaft 22 correspond one-to-one with the mounting holes 133. When the gap between the code disk 21 and the photoelectric converter 122 is within a preset value H, the positioning member 31 is inserted into the mounting hole 133, and one end of the positioning member 31 abuts against the corresponding positioning surface 223 to fix the grating assembly 2 relative to the encoder body 1. By providing the circuit board assembly 12 covering the open opening of the outer casing 13, it is convenient to place the grating assembly 2 into the receiving cavity 131 of the outer casing 13.

[0065] According to an embodiment of the present invention, the split encoder 10, by setting a positioning surface 223 and making the positioning surface 223 a plane, can increase the contact area between a single positioning member 31 and the rotating shaft 22, improve the reliability of the positioning assembly in fixing the rotating shaft 22, and simplify positioning. By fixing the grating assembly 2 and the encoder body 1 together by the positioning assembly, the split encoder 10 can be installed or transported as a whole, preventing the grating assembly 2 from being contaminated, reducing the transportation space occupied by the split encoder 10 during transportation, and ensuring that the relative positional relationship between the grating assembly 2 and the encoder body 2 remains unchanged, thus ensuring that the installation accuracy of the grating assembly 2 and the encoder body 1 remains unchanged. This ensures the measurement accuracy of the split encoder 10, facilitates installation, and has high installation efficiency.

[0066] Reference Figure 8 and Figure 9 According to some embodiments of the present invention, the positioning surface 223 is parallel to the central axis of the rotation shaft 22. When the positioning member 31 contacts the positioning surface 223, this prevents the grating assembly 2 from displacing axially, making the positioning of the rotation shaft 22 by the positioning assembly more reliable. Moreover, machining a plane parallel to the center line of the rotation shaft 22 is relatively simple, which can reduce the difficulty of the process and improve production efficiency.

[0067] Reference Figure 8 According to some embodiments of the present invention, the surface of the positioning member 31 that abuts against the corresponding positioning surface 223 is a contact surface 311, which is a plane and is parallel and fits against the corresponding positioning surface 223. This increases the contact area between a single positioning member 31 and the rotating shaft 22, further improving the reliability of the positioning assembly in fixing the rotating shaft 22.

[0068] Reference Figure 2 , Figure 4 and Figure 8According to some embodiments of the present invention, there are two positioning surfaces 223, which are arranged opposite each other radially along the rotating shaft 22 and are parallel to each other. There are also two mounting holes 133, which are arranged opposite each other radially along the encoder body 1. When the two positioning members 31 abut against the two positioning surfaces 223 of the rotating shaft 22, the forces at both ends of the rotating shaft 22 are balanced, allowing the positioning assembly to reliably fix the rotating shaft 22, reducing the number of positioning members 31 and improving installation efficiency.

[0069] At the same time, since the number of positioning surfaces 223 is set to be small, the number of mounting holes 133 can be set to be small, reducing the machining features of the rotating shaft 22 (e.g., reducing the number of machining positioning surfaces 223) and the machining features of the encoder body 1 (e.g., reducing the number of machining mounting holes 133), thereby improving production efficiency and reducing production costs.

[0070] Reference Figure 2 , Figure 4 and Figure 8 According to some embodiments of the present invention, a plurality of mounting holes 133 are formed on the outer peripheral wall of the encoder body 1, and the plurality of mounting holes 133 are arranged at intervals along the circumference of the encoder body 1. A thread is formed on the outer peripheral wall of the positioning member 31, and a thread is formed on the inner peripheral wall of the mounting hole 133. The positioning member 31 is threadedly connected to the inner peripheral wall of the mounting hole 133.

[0071] The threaded connection has high reliability. After the positioning component 31 fixes the grating assembly 2 relative to the encoder body 1, during the transportation of the split encoder 10, this can reduce the amount of displacement of the grating assembly 2 relative to the encoder body 1 caused by the bumps of the split encoder 10, or prevent the grating assembly 2 relative to the encoder body 1 from sliding due to the bumps of the split encoder 10, so that the gap between the grating assembly 2 and the inner wall of the encoder body 1 is kept within the preset value H, thereby ensuring the measurement accuracy of the split encoder 10.

[0072] During the process of installing the split encoder 10 onto the motor 100, the amount of displacement of the grating assembly 2 relative to the encoder body 1 caused by the grating assembly 2 hitting the motor shaft 52 can be reduced, or the sliding of the grating assembly 2 relative to the encoder body 1 caused by the grating assembly 2 hitting the motor shaft 52 can be avoided, so that the internal relative positional relationship between the grating assembly 2 and the encoder body 1 remains unchanged, and the grating assembly 5 and the encoder body 1 always maintain the original installation accuracy, thereby ensuring the measurement accuracy of the split encoder 10.

[0073] Reference Figure 8According to some embodiments of the present invention, the mounting hole 133 includes a first hole segment 1331 and a second hole segment. The first hole segment 1331 and the second hole segment are arranged along the axial direction of the mounting hole 133 and are connected. The first hole segment 1331 is located radially outside the second hole segment. The inner diameter of the first hole segment 1331 is larger than the inner diameter of the second hole segment. The positioning member 31 is adapted to pass through the first hole segment 1331 and is threadedly connected to the inner circumferential wall of the second hole segment.

[0074] When adjusting the grating assembly 2 to the preset position, and it is necessary to use the positioning member 31 to position the grating assembly 2, the positioning member 31 can be placed into the first hole section 1331 first, and the positioning member 31 can be pushed towards the second hole section. When the thread at the front end of the positioning member 31 is engaged with the thread of the first hole section 1331, the positioning member 31 is screwed into the second hole section, and the contact surface 311 of the positioning member 31 is screwed out of the second hole section so that the contact surface 311 of the positioning member 31 abuts against the positioning surface 223 of the rotating shaft 22, and the grating assembly 2 is fixed relative to the encoder body 1.

[0075] Since the positioning member 31 can pass through the first hole section 1331, when the positioning member 31 is installed, the positioning member 31 does not extend beyond the outer wall of the encoder body 1 in the radial direction. This can reduce the radial dimension of the split encoder 10, making the structure of the split encoder 10 more compact and reducing the space occupied by the split encoder 10.

[0076] By setting a first hole segment 1331 and a second hole segment, and setting the inner diameter of the first hole segment and the second hole segment to be larger than the inner diameter of the second hole segment, it is convenient to put the positioning part 31 into the first hole segment 1331. After the positioning part 31 is put into the first hole segment 1331, the first hole segment 1331 can guide the positioning part 31, so that the positioning part 31 can be smoothly screwed into the second hole segment, which is convenient for assembly personnel to install the positioning part 31 and improves assembly efficiency.

[0077] By providing a thread on the inner wall of the second hole section that matches the external thread of the positioning member 31, the length of the thread formed on the inner wall of the mounting hole 133 in the radial direction of the encoder body 1 can be reduced, thereby improving the efficiency of machining the mounting hole 133, increasing production efficiency, and reducing production costs. Furthermore, this also reduces the length of the positioning member 31 screwed into the mounting hole 133, allowing the contact surface 311 of the positioning member 31 to be quickly screwed out of the second hole section and abut against the positioning surface 223, thus improving assembly efficiency.

[0078] Reference Figures 8-11According to some embodiments of the present invention, a plurality of fixing holes 221 are formed on the rotating shaft 22, and the plurality of fixing holes 221 are arranged at intervals along the circumference of the rotating shaft 22. The fixing holes 221 are spaced apart from the positioning surface 223. The second fastener 42 is adapted to pass through the fixing hole 221, and the second fastener 42 abuts against the outer peripheral wall of the motor shaft 52 or is connected to the motor shaft 52. For example, the rotating shaft 22 is formed with a mating hole 222, which penetrates the rotating shaft 22 in the radial direction. The motor shaft 52 is adapted to pass through the mating hole 222. The fixing hole 221 is formed on the outer peripheral wall of the rotating shaft 22, and the fixing hole 221 penetrates the rotating shaft 22 in the radial direction. The fixing hole 221 communicates with the mating hole 222.

[0079] When the assembler is assembling the motor 100, the assembler can pass the second fastener 42 through the fixing hole 221, abut the second fastener 42 against the outer peripheral wall of the motor shaft 52 or connect the second fastener 42 to the motor shaft 52 to fix the grating assembly 2 relative to the motor shaft 52. After fixing the grating assembly 2 relative to the motor shaft 52 (at least one second fastener 42 abuts against the surface of the motor shaft 52 or at least one second fastener 42 is connected to the motor shaft 52), the positioning member 31 is removed from the split encoder 10.

[0080] By setting the second fastener 42, the grating assembly 2 can be reliably fixed together with the motor shaft 52. When the motor 100 is working, the motor shaft 52 can drive the grating assembly 2 to move synchronously. This prevents the grating assembly 2 from rotating relative to the motor shaft 52, allowing the split encoder 10 to more accurately measure the rotation angle of the motor shaft 52, improving the sensitivity of the whole machine and enhancing its overall performance.

[0081] By separating the fixing hole 221 from the positioning surface 223, the contact surface 311 of the positioning component 31 and the fixing hole 221 are prevented from being opposite each other, which would reduce the contact area between the positioning component 31 and the positioning surface 223. This ensures the reliability of the positioning component in fixing the grating component 2, keeps the relative positional relationship between the grating component 2 and the encoder body 1 unchanged, and ensures that the grating component 5 and the encoder body 1 always maintain their original installation accuracy. This ensures the measurement accuracy of the split encoder 10, improves the sensitivity of the motor 100, and improves the overall performance of the motor 100.

[0082] Reference Figures 1-8 , Figure 10 According to some embodiments of the present invention, an mounting notch 134 is formed on the outer wall of the encoder body 1, and at least the head 411 of the first fastener 41 is accommodated in the mounting notch 134. For example, the first fastener 41 can be a bolt or a screw, and the post portion 412 of the first fastener 41 is adapted to pass through the encoder body 1 and the motor housing 51 to fix the encoder body 1 to the motor housing 51.

[0083] For example, when there are multiple mounting notches 134, the multiple mounting notches 134 are evenly spaced along the circumference of the encoder body 1. When the first fastener 41 fastens the encoder body 1 to the motor housing 51, this can make the encoder body 1 more evenly stressed, and make the fixation of the encoder body 1 by the multiple first fasteners 41 more reliable.

[0084] Compared to encoders with mounting lugs formed on the outer wall of the encoder body 1, accommodating the head 411 of the first fastener 41 at the mounting notch 134 reduces the radial dimension of the split encoder 10, making its structure more compact and its volume smaller. Furthermore, the inwardly recessed mounting notch 134 in the radial direction of the encoder body 1 saves material used in manufacturing the encoder body 1, reducing the production cost of the split encoder 10.

[0085] Reference Figures 1-8 , Figure 10 According to some embodiments of the present invention, a mounting notch 134 is formed on the outer peripheral wall of the encoder body 1, and the mounting notch 134 penetrates two axially opposite end faces of the encoder body 1.

[0086] When it is necessary to fix the encoder body 1 to the motor housing 51 (e.g., the rear end cover of the motor 100), the assembler can place the first fastener 41 radially into the mounting notch 134, and then pass the post of the first fastener 41 through the encoder body 1 and the motor housing 51 to fix the encoder body 1 to the motor housing 51. This facilitates the assembler's installation of the first fastener 41 and improves installation efficiency.

[0087] For example, when the encoder body 1 includes a housing 13 and a circuit board assembly 12, the circuit board assembly 12 includes a circuit board 121. The mounting notch 134 includes a main notch 1341, a through hole 136, and a mounting clearance hole 1211. The main notch 1341 is formed on the outer peripheral wall of the housing 13 and penetrates the end face of the housing 13 axially away from the mounting opening 132. The through hole 136 is formed on the side wall of the housing 13 opposite to the mounting notch 134 in the axial direction and penetrates the outer peripheral wall of the housing 13 in the radial direction.

[0088] Fastening arms 137 are formed on both sides of the through hole 136 in the circumferential direction. The fastening arms 137 are opposite to the main notch 1341 in the circumferential direction. The head 411 of the first fastener 41 is adapted to abut against the fastening arms 137, and the body 412 of the first fastener 41 passes through the through hole 136. A mounting clearance hole 1211 is formed on the circuit board 121, and the mounting clearance hole 1211 can penetrate the outer peripheral wall of the circuit board 121 in the radial direction.

[0089] When it is necessary to fix the encoder body 1 to the motor housing 51 (e.g., the rear end cover of the motor 100), the assembler can push the head 411 of the first fastener 41 into the main notch 1341 along the radial direction of the encoder body 1, push the body 412 of the first fastener 41 into the main notch 1341 and the through hole 136, pass the post 412 of the first fastener 41 through the aligned fastening hole 511, and then pass a screwdriver through the mounting clearance hole 1211 to screw the post 412 of the first fastener 41 into the fastening hole 511, thereby fixing the encoder body 1 to the motor housing 51.

[0090] By extending the through hole 136 to the outer side wall of the encoder body 1, the first fastener 41 can be directly inserted through the outer side wall of the encoder body 1 into the encoder body 1 and the motor housing 51, which facilitates the installation of the first fastener 41 and improves installation efficiency. Moreover, this eliminates the need to reserve installation space for the first fastener 41 in the axial direction of the mounting notch 134, thereby reducing the axial dimension of the split encoder 10 and making the split encoder 10 more compact.

[0091] Reference Figure 1 , Figure 6 and Figure 10 According to some embodiments of the present invention, a fixing hole 221 is formed on the rotating shaft 22, the fixing hole 221 is spaced apart from the positioning surface 223, the second fastener 42 is adapted to pass through the fixing hole 221, and the second fastener 42 abuts against the outer peripheral wall of the motor shaft 52 or the second fastener 42 is connected to the motor shaft 52, and the mounting notch 134 penetrates the inner peripheral wall of the receiving cavity 131. During the process of installing the split encoder 10 on the motor body 5, the second fastener 42 is adapted to be installed into the fixing hole 221 through the mounting notch 134, for example, the second fastener 42 is adapted to be installed into the fixing hole 221 through the main notch 1341.

[0092] By extending the mounting notch 134 through the inner peripheral wall of the receiving cavity 131, the second fastener 42 is installed into the fixing hole 221 through the mounting notch 134. This eliminates the need to provide a hole on the outer wall of the encoder body 1 to avoid the second fastener 42, thereby reducing the machining features of the encoder body 1, improving assembly efficiency, and reducing production costs.

[0093] For example, there can be one fixing hole 221, with one mounting notch 134 opposite to the fixing hole 221. When the motor shaft 52 of the motor 100 is inserted into the mating hole 222 of the rotating shaft 22, the second fastener 42 can be installed into the fixing hole 221 through the mounting notch 134. After fixing the grating assembly 2 relative to the motor shaft 52, the positioning part 31 can be removed from the encoder body 1 to complete the installation.

[0094] For example, there can be multiple fixing holes 221 and multiple mounting notches 134, with the same number of fixing holes 221 and multiple mounting notches 134, and each corresponding to the other. When the motor shaft 52 of the motor 100 is inserted into the mating hole 222 of the rotating shaft 22, the second fastener 42 can be installed into the fixing hole 221 through the corresponding mounting notch 134. After fixing the grating assembly 2 relative to the motor shaft 52, the positioning part 31 can be removed from the encoder body 1 to complete the installation. By setting multiple fixing holes 221, the grating assembly 2 can be more reliably fixed relative to the motor shaft 52.

[0095] For example, there can be multiple fixing holes 221 and multiple mounting notches 134, with a number of fixing holes 221 corresponding to a number of mounting notches 134. When the motor shaft 52 of the motor 100 is inserted into the mating hole 222 of the rotating shaft 22, the second fastener 42 can be installed into the fixing hole 221 corresponding to the mounting notch 134 through the mounting notch 134.

[0096] When the second fasteners 42 abut against the motor shaft 52 or are connected to the motor shaft 52, remove the positioning member 31 from the encoder body 1, rotate the encoder body 1 so that one of the remaining mounting holes 133 is aligned with one of the mounting notches 134, and install the second fastener 42 into the mounting hole 133 through the mounting notch 134. Then rotate the encoder body 1 so that the other of the remaining mounting holes 133 is aligned with one of the mounting notches 134, and install the second fastener 42 into the other mounting hole 133 through the mounting notch 134. Continue in this manner until all mounting holes 133 are fitted with the second fasteners 42 and the second fasteners 42 abut against the motor shaft 52, and the installation is complete.

[0097] When one of the second fasteners 42 abuts against the motor shaft 52 or when one of the second fasteners 42 is connected to the motor shaft 52, the rotating shaft 22 can be fixed relative to the motor shaft 52, so that the internal relative positional relationship between the grating assembly 2 and the encoder body 1 remains unchanged. By setting multiple second fasteners 42 to position the grating assembly 2, the grating assembly 2 can be more reliably fixed relative to the motor shaft 52, preventing the grating assembly 2 from rotating relative to the motor shaft 52. This allows the split encoder 10 to more accurately measure the rotation angle of the motor shaft 52, improving the overall sensitivity and performance of the machine.

[0098] In a specific embodiment of the present invention, there are two fixing holes 221, the axes of which are perpendicular to each other. There are also two mounting notches 134, which are arranged opposite each other along the axial direction of the encoder body 1, with one fixing hole 221 opposite to the mounting notch 134. When the motor shaft 52 of the motor 100 is inserted into the mating hole 222 of the rotating shaft 22, the second fastener 42 can be installed into the corresponding fixing hole 221 through the corresponding mounting notch 134. When the second fastener 42 abuts against the motor shaft 52 or is connected to the motor shaft 52, the positioning assembly is removed, the encoder body 1 is rotated, and the other fixing hole 221 is aligned with one of the mounting notches 134. The second fastener 42 is then installed into the other fixing hole 221 through this mounting notch 134. Installation is complete when the second fastener 42 abuts against the motor shaft 52.

[0099] By setting the axes of the two fixing holes 221 to be perpendicular to each other, when the two second fasteners 42 abut against the motor shaft 52, the inner wall of the mating hole 222 can fit more tightly against the outer wall of the motor shaft 52, increasing the contact area between the motor shaft 52 and the rotating shaft 22, and further improving the reliability of the second fasteners 42 in fixing the rotating shaft 22.

[0100] The following is for reference. Figures 1-11 A split encoder 10 according to an embodiment of the present invention is described.

[0101] Reference Figure 1 , Figures 6-11 The split encoder 10 includes an encoder body 1, a grating assembly 2 and a positioning assembly. The encoder body 1 has a receiving cavity 131. The outer wall of the encoder body 1 has a mounting opening 132 and mounting holes 133. The mounting opening 132 communicates with the receiving cavity 131. There are multiple mounting holes 133, and the multiple mounting holes 133 communicate with the receiving cavity 131.

[0102] Reference Figures 6-11 The encoder body 1 may include a circuit board assembly 12, a housing 13, and a light source 11. One axial side of the housing 13 is open to form an opening. The circuit board assembly 12 covers the opening of the housing 13, and a receiving cavity 131 is defined between the circuit board assembly 12 and the housing 13. A mounting opening 132 is formed on the other axial side of the housing 13. Multiple mounting holes 133 are formed on the peripheral wall of the housing 13, penetrating the peripheral wall of the housing 13, and are spaced apart circumferentially along the housing 13. The circuit board assembly 12 includes a circuit board 121 and a photoelectric converter 122. The photoelectric converter 122 is disposed on the circuit board 121. A third fastener 43 passes through the circuit board 121 and the housing 13 to fix the circuit board 121 relative to the housing 13.

[0103] Reference Figure 8 The mounting hole 133 includes a first hole segment 1331 and a second hole segment. The first hole segment 1331 and the second hole segment are arranged along the axial direction of the mounting hole 133 and are connected. The first hole segment 1331 is located on the radial outer side of the second hole segment. The inner diameter of the first hole segment 1331 is larger than the inner diameter of the second hole segment. The positioning member 31 is adapted to pass through the first hole segment 1331 and is threadedly connected to the inner circumferential wall of the second hole segment.

[0104] Reference Figure 1 , Figure 2 , Figures 4-10 An mounting notch 134 is formed on the outer wall of the encoder body 1, and the mounting notch 134 penetrates two axially opposite end faces of the encoder body 1. The head 411 of the first fastener 41 is accommodated in the mounting notch 134. For example, the first fastener 41 can be a bolt or a screw. The post portion 412 of the first fastener 41 is adapted to pass through the encoder body 1 and the motor housing 51 to fix the encoder body 1 to the motor housing 51.

[0105] The mounting notch 134 includes a main notch 1341, a through hole 136, and a mounting clearance hole 1211. The main notch 1341 is formed on the outer peripheral wall of the housing 13 and penetrates the end face of the housing 13 away from the mounting opening 132 along the axial direction. The through hole 136 is formed on the side wall of the housing 13 opposite to the mounting notch 134 in the axial direction and penetrates the outer peripheral wall of the housing 13 in the radial direction.

[0106] Fastening arms 137 are formed on both sides of the through hole 136 in the circumferential direction. The fastening arms 137 are opposite to the main notch 1341 in the circumferential direction. The head 411 of the first fastener 41 is adapted to abut against the fastening arms 137, and the body 412 of the first fastener 41 passes through the through hole 136. A mounting clearance hole 1211 is formed on the circuit board 121, and the mounting clearance hole 1211 can penetrate the outer peripheral wall of the circuit board 121 in the radial direction.

[0107] Reference Figures 6-8 , Figure 10 and Figure 11 The grating assembly 2 is located inside the receiving cavity 131 and is spaced apart from the inner wall of the receiving cavity 131. The grating assembly 2 includes a rotating shaft 22 and a code disk 21. The code disk 21 is located on the rotating shaft 22. The mounting port 132 is located on one side of the axial direction of the rotating shaft 22. Multiple positioning surfaces 223 are formed on the outer peripheral wall of the rotating shaft 22. The multiple positioning surfaces 223 are arranged at intervals along the circumference of the rotating shaft 22. The number of positioning surfaces 223 is the same as the number of mounting holes 133 and corresponds one-to-one. The positioning surfaces 223 are planar.

[0108] Reference Figures 6-8 , Figure 10 and Figure 11The positioning assembly includes multiple positioning elements 31, the number of which corresponds one-to-one with the number of mounting holes 133. Each positioning element 31 passes through a corresponding mounting hole 133 and abuts against a corresponding positioning surface 223. The positioning surface 223 is parallel to the central axis of the rotation shaft 22. The surface of the positioning element 31 that abuts against the corresponding positioning surface 223 is a contact surface 311, which is a plane and is parallel and fits against the corresponding positioning surface 223.

[0109] Specifically, there are two positioning surfaces 223, which are arranged opposite each other radially along the rotating shaft 22 and are parallel to each other. There are also two mounting holes 133, which are arranged opposite each other radially along the encoder body 1. The outer peripheral wall of the positioning member 31 is threaded, and the inner peripheral wall of the mounting hole 133 is threaded, and the positioning member 31 is threadedly connected to the inner peripheral wall of the mounting hole 133.

[0110] Reference Figures 6-8 , Figure 10 and Figure 11 The code disk 21 is connected to one side of the rotating shaft 22 adjacent to the circuit board assembly 12. The housing 13 also has a receiving groove 135, within which a light source 11 is disposed. The receiving groove 135 can be formed on the other axial side of the housing 13. The receiving groove 135 communicates axially with the receiving cavity 131. The light source 11 and the photoelectric converter 122 are arranged opposite each other in the axial direction. The gap between the code disk 21 and the photoelectric converter 122 is a preset value H.

[0111] A flange 224 is formed at the end of the rotating shaft 22 near the code disk 21. The diameter of the flange 224 is larger than the diameter of the mounting opening 132. During transportation or assembly of the split encoder 10, when the grating assembly 2 moves relative to the encoder body 1 toward the mounting opening 132, the flange 224 can protect the code disk 21, preventing the inner wall of the receiving cavity 131 from hitting the code disk 21 and causing damage to the code disk 21.

[0112] Reference Figures 9-11 A fixing hole 221 is formed on the rotating shaft 22, which is spaced apart from the positioning surface 223. The second fastener 42 is adapted to pass through the fixing hole 221, and the second fastener 42 abuts against the outer peripheral wall of the motor shaft 52 or is connected to the motor shaft 52. The mounting notch 134 penetrates the inner peripheral wall of the receiving cavity 131. During the process of installing the split encoder 10 onto the motor body 5, the second fastener 42 is adapted to be installed into the fixing hole 221 through the mounting notch 134. For example, the motor shaft 52 can be a rotor or a rotor shaft.

[0113] Specifically, there are two fixing holes 221, the axes of the two fixing holes 221 are perpendicular to each other, and there are two mounting notches 134, which are arranged opposite each other along the axial direction of the encoder body 1, with one fixing hole 221 opposite to the mounting notch 134.

[0114] Reference Figure 10 According to a second aspect of the present invention, a motor 100 includes a motor body 5 and a split encoder 10. The motor body 5 includes a motor housing 51 and a motor shaft 52. The split encoder 10 is a split encoder 10 according to the first aspect of the present invention. The encoder body 1 is fixed to the motor housing 51. The motor shaft 52 passes through the mounting hole 132. The motor shaft 52 is connected to the grating assembly 2. The grating assembly 2 is fixed relative to the motor shaft 52.

[0115] When assembling the motor 100, the separate encoder 10 is installed as a whole. For example, the mating hole 222 can be aligned with the motor shaft 52, and the motor shaft 52 can be inserted into the mating hole 222. Then, one end of the second fastener 42 is abutted against the motor shaft 52 to fix the rotating shaft 22 to the motor shaft 52. Next, the post portion of the first fastener 41 is inserted through the through hole 136 and the fastening hole 511 to fix the encoder body 1 to the motor housing 51. When the encoder body 1 is fixed relative to the motor housing 51 and the motor shaft 52 is fixed relative to the rotating shaft 22, the positioning component can be removed from the encoder body 1 to complete the installation.

[0116] According to the embodiment of the present invention, by setting the above-mentioned split encoder 10, the motor 100 does not need to correct and compensate the gap between the code disk 21 and the photoelectric converter 122 during the process of installing the split encoder 10 onto the motor body 5, which makes the installation of the motor 100 more convenient and improves the installation efficiency of the motor 100.

[0117] Reference Figure 11 and Figure 12 According to a third aspect embodiment of the present invention, the auxiliary tooling 90 is used for assembling the split encoder 10 according to the first aspect embodiment of the present invention. The auxiliary tooling 90 includes a support base 92 and a positioning post 91. The support base 92 has a first support surface 921 and a second support surface 922. The first support surface 921 is located on the outer periphery of the second support surface 922. The positioning post 91 is disposed on the support base 92, and the first support surface 921 is located on the outer periphery of the positioning post 91.

[0118] During the assembly of the split encoder 10 using the auxiliary tooling 90, the encoder body 1 abuts and is supported on the first support surface 921, the rotating shaft 22 abuts and is supported on the second support surface 922, and the positioning pin 91 is adapted to be inserted into the mating hole 222 of the rotating shaft 22. When the encoder body 1 abuts and is supported on the first support surface 921, and the rotating shaft 22 abuts and is supported on the second support surface 922, the positional relationship between the grating assembly 5 and the encoder body 1 meets the installation accuracy requirements between the grating assembly 5 and the encoder body 1.

[0119] During the assembly of the split encoder 10 using the auxiliary fixture 90, the grating assembly 2 can be placed in the receiving cavity 131 of the encoder body 1. The mounting port 132 of the encoder body 1 is aligned with the positioning post 91 of the auxiliary fixture 90. The positioning post 91 is inserted into the mating hole 222 of the rotating shaft 22. The split encoder 10 is placed on the auxiliary fixture 90 along the axial direction of the positioning post 91. The encoder body 1 is supported against the first support surface 921, and the rotating shaft 22 is supported against the second support surface 922. The encoder body 1 is rotated so that the positioning surface 223 aligns with the mounting hole 133. The positioning member 31 is installed into the mounting hole 133, and the contact surface 311 of the positioning member 31 abuts against the positioning surface 223, thus completing the assembly of the split encoder 10.

[0120] By setting up auxiliary tooling 90, the encoder body 1 is supported on the first support surface 921, and the rotating shaft 22 is supported on the second support surface 922. The grating assembly 2 can be accurately positioned in the encoder body 1, ensuring the installation accuracy between the grating assembly 5 and the encoder body 1. This ensures the measurement accuracy of the split encoder 10, reduces the debugging and correction operations of assembly personnel, facilitates the assembly of the split encoder 10, improves assembly efficiency, and reduces production costs.

[0121] According to the embodiment of the present invention, the auxiliary tooling 90 can accurately position the grating assembly 2 in the encoder body 1 by assembling the split encoder 10, ensuring the installation accuracy of the grating assembly 5 and the encoder body 1, ensuring the measurement accuracy of the split encoder 10, improving the installation efficiency and installation accuracy of the split encoder 10, and reducing production costs.

[0122] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element 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 invention.

[0123] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0124] Although embodiments of the invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A split-type encoder that is installed as a single unit, characterized in that, include: An encoder body has a receiving cavity inside, and the outer wall of the encoder body has a plurality of mounting holes communicating with the receiving cavity; A grating assembly is located within the receiving cavity and spaced apart from the inner wall of the receiving cavity. The grating assembly includes a rotating shaft and a code disk disposed on the rotating shaft. A plurality of positioning surfaces are formed on the outer peripheral wall of the rotating shaft and are arranged circumferentially at intervals along the rotating shaft. The number of positioning surfaces is the same as the number of mounting holes and corresponds one-to-one. The positioning surfaces are planes. The axial end face of the rotating shaft away from the code disk is a first end face. The positioning surfaces extend axially along the rotating shaft to the first end face. A positioning component for fixing the grating assembly includes multiple positioning elements, the number of which is the same as the number of mounting holes and corresponds one-to-one. Each positioning element passes through the corresponding mounting hole and abuts against the corresponding positioning surface. The positioning element is threaded to the inner peripheral wall of the mounting hole. The surface of the positioning element that abuts against the corresponding positioning surface is a contact surface, which is a plane and is parallel and fits the corresponding positioning surface.

2. The split encoder according to claim 1, characterized in that, The positioning surfaces are two radially opposite each other along the rotation axis, and the two positioning surfaces are arranged in parallel.

3. The split encoder according to claim 1, characterized in that, The positioning surface is parallel to the central axis of the rotation axis.

4. The split encoder according to claim 1, characterized in that, The mounting hole includes a first hole segment and a second hole segment arranged axially and communicating with each other. The first hole segment is located radially outside the second hole segment, and the inner diameter of the first hole segment is larger than the inner diameter of the second hole segment. The positioning member is adapted to pass through the first hole segment and be threadedly connected to the inner circumferential wall of the second hole segment.

5. The split encoder according to claim 1, characterized in that, The rotating shaft has a plurality of fixing holes arranged circumferentially along the rotating shaft. The fixing holes are spaced apart from the positioning surface. The second fastener is adapted to pass through the fixing holes and abut against or connect to the outer peripheral wall of the motor shaft.

6. The split encoder according to claim 1, characterized in that, An mounting notch is formed on the outer wall of the encoder body, at least the head of the first fastener is accommodated in the mounting notch, and the post portion of the first fastener is adapted to pass through the encoder body and the motor housing.

7. The split encoder according to claim 6, characterized in that, The mounting notch is formed on the outer peripheral wall of the encoder body and extends through two axially opposite end faces of the encoder body.

8. The split encoder according to claim 6, characterized in that, A fixing hole spaced apart from the positioning surface is formed on the rotating shaft. The second fastener is adapted to pass through the fixing hole and abut against or connect with the outer peripheral wall of the motor shaft. The mounting notch penetrates the inner peripheral wall of the receiving cavity. During the process of installing the split encoder onto the motor body, the second fastener is adapted to be installed into the fixing hole through the mounting notch.

9. An electric motor, characterized in that, include: The motor body includes a motor housing and a motor shaft; The split encoder is a split encoder according to any one of claims 1-8, wherein the encoder body is fixed to the motor housing, the motor shaft passes through the mounting hole and is connected to the grating assembly, and the grating assembly is fixed relative to the motor shaft.

10. An auxiliary tooling for assembling a split encoder according to any one of claims 1-8, characterized in that, The auxiliary tooling includes: A support base having a first support surface and a second support surface, wherein the first support surface is located on the outer periphery of the second support surface; A positioning post is provided on the support base, and the first support surface is located on the outer periphery of the positioning post. During the assembly of the split encoder using the auxiliary tooling, the encoder body is supported against the first support surface, the rotating shaft is supported against the second support surface, and the positioning pin is adapted to be inserted into the mating hole of the rotating shaft.

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