Encoder and servo motor

Abstract

The utility model discloses an encoder and a servo motor, belonging to the encoder technology field, the encoder comprises a circuit board, a magnet, a magnet seat and a support, the magnet is coaxially installed at one end of the magnet seat, the circuit board is coaxially installed on the support, the other end of the magnet seat is coaxially and fixedly installed with a motor shaft, and the motor shaft is coaxially and fixedly installed on the support. And the magnet seat and the magnet are arranged in an accommodating space formed between the circuit board and the bracket. According to the utility model, the convex part and the third through hole are arranged on the magnet seat, a threaded hole structure is omitted, and a boss structure is arranged at one end of the motor shaft; when the magnetic encoder is assembled, one end of the motor shaft is installed in the third through hole, the third through hole is in axial contact with the boss structure of the motor shaft, and meanwhile, the magnetic encoder is assembled in an interference fit mode, so that negative effects of screws on magnetism are avoided, and the reliability of the magnetic encoder is guaranteed.

Description

Technical Field

[0001] This utility model relates to the field of encoder technology, and in particular to encoders and servo motors. Background Technology

[0002] Encoders are crucial components for ensuring the operational accuracy and performance of servo motors. Connecting the control system and the servo motor, the encoder monitors the motor's rotational position in real time and feeds the data back to the control system. Simultaneously, the encoder compares the motor's operating position with the set position and calibrates the operating status to ensure the motor reaches the set position. A wide variety of encoders are available on the market, among which magnetic encoders are widely used due to their simple structure, high reliability, and strong anti-interference capabilities.

[0003] In existing technology, the magnet holder and the motor shaft need to be fixed together with screws, which are installed on the side wall or the center of the top of the magnet holder. If the screw is placed on the side wall of the magnet holder, the installation difficulty will be increased due to the bracket obstruction; if the screw is placed at the center of the top of the magnet holder, the screw will affect the magnetism of the magnet. In addition, the installation of the screw requires a certain assembly length, which will lead to an increase in the length of the motor and a reduction in the range of applications of the motor. Utility Model Content

[0004] This invention aims to overcome the problems of reduced magnetism, multiple installation steps, and increased motor length caused by installing screws on the magnet base in the prior art, and provides an encoder and servo motor.

[0005] To achieve the above objectives, the present invention provides an encoder, comprising a circuit board, a magnet, a magnet holder, and a bracket. The circuit board is coaxially mounted on the bracket, and the circuit board and the bracket form a receiving space. The magnet holder and the magnet are installed in the receiving space, and the magnet is coaxially mounted at one end of the magnet holder.

[0006] This utility model also provides a servo motor, including,

[0007] The encoder;

[0008] A motor shaft, which is coaxially mounted with the other end of the magnet holder in the encoder;

[0009] The encoder is axially mounted on the housing, and the motor shaft is coaxially mounted inside the housing.

[0010] Rear cover, the rear cover being mounted outside the encoder;

[0011] Internal components, which are installed inside the housing.

[0012] In one embodiment, a third through hole is formed at the center of the magnet base, and one end of the motor shaft is installed in the third through hole.

[0013] In one embodiment, a boss structure is provided at one end of the motor shaft, and the boss structure is in direct contact with the bottom end of the magnet base.

[0014] In one embodiment, the bracket includes a groove, at least one support post, and a second through hole. The groove is disposed at the center of the upper end face of the bracket, the at least one support post is disposed around the inside of the groove, and the second through hole is opened at the center of the groove.

[0015] In one embodiment, the magnet holder is mounted in the second through hole.

[0016] In one embodiment, the circuit board is axially fixedly mounted on the support column.

[0017] In one embodiment, the bracket is axially mounted on the housing, and the rear cover is axially mounted on the bracket.

[0018] This utility model discloses an encoder and a servo motor. By setting a protrusion and a third through hole on the magnet seat and eliminating the threaded hole structure, a boss structure is set at one end of the motor shaft. One end of the motor shaft is installed in the third through hole, and the third through hole is in axial contact with the boss structure of the motor shaft. At the same time, an interference fit is used for assembly to avoid the screws from having a negative impact on the magnetism, thus ensuring the reliability of the magnetic encoder.

[0019] To make the above-mentioned features and advantages of the utility model more apparent and understandable, specific embodiments are described below, and detailed descriptions are provided in conjunction with the accompanying drawings. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the encoder and servo motor in this utility model.

[0021] Figure 2 for Figure 1 Exploded view of the encoder and servo motor.

[0022] Figure 3 for Figure 1 Front view of the encoder and servo motor.

[0023] Figure 4 for Figure 3 AA section view. Detailed Implementation

[0024] To make the objectives and technical solutions of the present utility model clearer, the technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present utility model. All other embodiments obtained by those skilled in the art based on the described embodiments of the present utility model without creative effort are within the scope of protection of the present utility model.

[0025] In the description of this utility model, it should be understood that the terms "center", "radial", "axial", "upper", "lower", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. They are only for the convenience of describing this utility model 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 utility model.

[0026] Figure 1 This is a schematic diagram of the encoder and servo motor in this utility model. Figure 1 As shown, an encoder is installed inside the servo motor. The encoder can feed back the rotation angle and linear displacement of the motor shaft to the control system to achieve precise positioning control of the motor shaft. A rear cover is installed on the outside of the encoder. The rear cover serves to seal against dust, water, and other impurities, effectively protecting the electronic components inside the encoder and maintaining the encoder's operational stability.

[0027] Figure 2 This is an exploded view of the encoder and servo motor in this utility model. Figure 2 As shown, the servo motor includes an encoder 1, a housing 2, a motor shaft 3, a rear cover 4, and internal components 5 (see Figure 5). Figure 2 The motor shaft 3 is coaxially mounted inside the housing 2, with both ends of the motor shaft 3 extending out of the housing 2. The encoder 1 is coaxially mounted on one end of the motor shaft 3 and is axially mounted on the housing 2. The rear cover 4 is axially mounted outside the encoder 1, and the internal component 5 is mounted inside the housing 2.

[0028] like Figure 2As shown, the housing 2 has a first through hole 21 at its center for mounting various components. The housing 2 also includes a first plane 22, which is the upper surface of the housing 2. The first plane 22 has at least one first threaded hole 23 and at least one second threaded hole 24. The first threaded hole 23 is used to install screws for fixing the encoder 1, and the second threaded hole 24 is used to install screws for fixing the encoder 1 and the rear cover 4. Both the first threaded hole 23 and the second threaded hole 24 are blind holes to ensure a seal.

[0029] The rear cover 4 includes a fourth plane 42 and a fifth plane 41. The fourth plane 42 is the lower end face of the rear cover 4, and the fifth plane 41 is the upper end face of the rear cover 4. At least one groove 43 is formed on the fourth plane 42, and a third threaded hole 44 is formed in any one of the grooves 43. The number and shape of the third threaded holes 44 match those of the second threaded holes 24.

[0030] The encoder 1 includes a circuit board 11, a magnet 12, a magnet base 13, and a bracket 14. The circuit board 11 is coaxially mounted on the bracket 14, and a receiving space 15 is formed between the circuit board 11 and the bracket 14 (see...). Figure 4 The magnet base 13 and the magnet 12 are installed in the receiving space 15. The magnet 12 is coaxially installed at one end of the magnet base 13, and the other end of the magnet base 13 is coaxially fixedly installed with the motor shaft 3. The magnet base 13 is installed on the bracket 14.

[0031] The circuit board 11 includes a sixth plane 111, a seventh plane 112, a fourth threaded hole 113, and an output terminal 114. The sixth plane 111 is the lower end face of the circuit board 11, and the seventh plane 112 is the upper end face of the circuit board 11. At least one fourth threaded hole 113 is formed at the edge of the circuit board 11, and the output terminal 114 is mounted on the seventh plane 112 of the circuit board 11. The fourth threaded hole 113 is a through hole and is used to install screws that fix the circuit board 11 and the bracket 14.

[0032] The bracket 14 includes a second plane 141, a third plane 142, a groove 143, at least one support column 144, a second through hole 145, at least one fifth threaded hole 146, at least one sixth threaded hole 147, at least one seventh threaded hole 148, and at least one eighth threaded hole 149. The second plane 141 is the lower end face of the bracket 14, and the third plane 142 is the upper end face of the bracket 14. The groove 143 is located at the center of the third plane 142. The second through hole 145 is located at the center of the groove 143. At least one support column 144 is located around the inside of the groove 143. At least one eighth threaded hole 149 is located inside the groove 143. The support columns 144 and the eighth threaded holes 149 are distributed along the circumference of the groove 143. A fifth threaded hole 146 is provided on each support column 144. At least one sixth threaded hole 147 and at least one seventh threaded hole 148 are located on the edge of the bracket.

[0033] The second through hole 145 and the groove 143 are used to install the magnet base 13.

[0034] The support column 144 and the bracket 14 are integrally formed. The diameter and number of the fourth threaded hole 113 and the eighth threaded hole 149 correspond. In addition, the edge of the support column 144 has an axially protruding stepped structure 1441, which is used to radially limit the circuit board 11. When the circuit board 11 is mounted on the bracket 14, the sixth plane 111 of the circuit board 11 is in direct contact with the upper end face of the support column 144, and the fourth threaded hole 113 is aligned with the fifth threaded hole 146 and fixed with screws.

[0035] The sixth threaded hole 147 matches the diameter and number of the first threaded hole 23 and the third threaded hole 44, and the three are aligned and tightened with screws; the seventh threaded hole 148 matches the diameter and number of the second threaded hole 24, and the two are fixed with screws during installation. Screws for fixing the connecting bracket and the brake inside the housing 2 are installed in the eighth threaded hole 149.

[0036] The magnet holder 13 includes a body 131 and a protrusion 132, the protrusion 132 being axially mounted on the bottom end of the body 131. The body 131 has a disc structure, and the protrusion 132 has a cylindrical structure. The magnet holder 13 is installed in the second through hole 145 and the groove 143, with a gap between the bottom end of the body 131 and the upper end of the groove 143, and the protrusion 132 is installed in the second through hole 145. A third through hole 133 is provided at the center of both the body 131 and the protrusion 132. The protrusion 132 is a portion extending axially from the wall of the third through hole 133, and the bottom end of the protrusion 132 can make axial contact with the boss structure 31 on the top of the motor shaft 3. The magnet holder 13 and the motor shaft 3 are interference-fitted, and a highly adhesive is applied for further fixing. The magnet holder 13 eliminates the threaded hole structure to avoid the negative impact of screws on magnetism, ensuring the reliability of the magnetic encoder 1.

[0037] Furthermore, this application uses a circular magnet 12 as the magnetic code track. The magnet 12 is coaxially fixedly installed inside the body 131 of the magnet base 13, and a highly adhesive glue is applied between the magnet 12 and the magnet base 13. During operation, as the motor shaft 3 rotates, the magnet base 13 can drive the magnet 12 to rotate synchronously. Simultaneously, since the magnet base 13 is only in direct contact with the motor shaft 3 and the magnet 12, the bracket 14 and the circuit board 11 do not rotate when the magnet base 13 and the magnet 12 rotate with the motor shaft 3.

[0038] Figure 4 for Figure 3 The sectional view of AA, combined with Figure 3 and Figure 4 As can be seen, during the assembly process, the first plane 22 and the second plane 141 are in direct contact, and the seventh threaded hole 148 and the second threaded hole 24 are aligned and fixed with screws, so that the bracket 14 is fixedly installed on the housing 2. The magnet 12 is fixed in the body 131 of the magnet seat 13 with glue; the end of the motor shaft 3 is press-fitted into the protrusion 132 and limited by the boss structure 31, and then glue is applied for secondary fixation. At the same time, the magnet seat 13 is coaxially installed in the second through hole 145 of the bracket 14. This utility model adopts a screwless installation method between the magnet seat 13 and the motor shaft 3, which not only achieves stable installation, but also avoids the negative impact of screws on the accuracy of the encoder 1 during operation.

[0039] The circuit board 11 is placed on the support column 144, with the sixth plane 111 in direct contact with the upper surface of the support column 144. After calibration, the fourth threaded hole 113 on the circuit board 11 is aligned with the eighth threaded hole 149 on the support column 144 and secured with screws. Since the circuit board 11 and the bracket 14 have only one contact surface, the installation process is simpler; furthermore, the bracket 14 provides more visualization space during installation, facilitating the assessment of assembly accuracy.

[0040] When the motor shaft 3 rotates, the magnet base 13 and the magnet 12 will operate synchronously; however, the bracket 14 and the circuit board 11 will not rotate. The circuit board 11 is equipped with a magnetic induction chip (not shown in the figure), which can detect the rotation angle of the motor shaft 3 by detecting changes in the magnetic field.

[0041] In order to maintain the stability of the working environment of the encoder 1, the fourth plane 42 of the rear cover 4 is in direct contact with the third plane 142 of the bracket 14, and the sixth threaded hole 147, the first threaded hole 23 and the third threaded hole 44 are aligned. After screws are installed, the rear cover 4 is fixedly installed.

[0042] In summary, this utility model discloses an encoder and a servo motor. By providing a protrusion 132 and a third through hole 133 on the magnet base 13 and eliminating the threaded hole structure, a boss structure 31 is provided at one end of the motor shaft 3. One end of the motor shaft 3 is installed in the third through hole 133, and the third through hole 133 is in axial contact with the boss structure 31 of the motor shaft 3. At the same time, an interference fit is used for assembly to avoid the negative impact of screws on magnetism and ensure the reliability of the magnetic encoder.

[0043] Although the present invention has been disclosed above by way of embodiments, it is not intended to limit the present invention. Anyone skilled in the art can make some modifications and refinements without departing from the spirit and scope of the present invention. Therefore, the scope of protection of the present invention shall be determined by the appended claims.

Claims

1. An encoder, characterized by The application relates to a motor encoder, which comprises a circuit board, a magnet, a magnet seat and a support, the circuit board is coaxially arranged on the support, the circuit board and the support form a containing space, the magnet seat and the magnet are arranged in the containing space, and the magnet is coaxially arranged at one end of the magnet seat; the support comprises a groove and at least one supporting column, the groove is arranged at the center of the upper end surface of the support, and the at least one supporting column is arranged around the inside of the groove; the magnet seat and the motor shaft are in interference fit.

2. The encoder of claim 1, wherein, The support comprises a second through hole, which is arranged at the center of the groove.

3. The encoder of claim 2, wherein, The magnet seat is arranged in the second through hole.

4. The encoder of claim 3, wherein, The circuit board is axially fixedly arranged on the supporting column.

5. The encoder of claim 4, wherein, The support is axially arranged on a shell, and a rear cover is axially arranged on the support.

6. Servomotor, characterized in that The application relates to a motor encoder, which comprises a circuit board, a magnet, a magnet seat and a support, the circuit board is coaxially arranged on the support, the circuit board and the support form a containing space, the magnet seat and the magnet are arranged in the containing space, and the magnet is coaxially arranged at one end of the magnet seat; the support comprises a groove and at least one supporting column, the groove is arranged at the center of the upper end surface of the support, and the at least one supporting column is arranged around the inside of the groove; the magnet seat and the motor shaft are in interference fit. The support comprises a second through hole, which is arranged at the center of the groove. The magnet seat is arranged in the second through hole. The circuit board is axially fixedly arranged on the supporting column. The support is axially arranged on a shell, and a rear cover is axially arranged on the support. The application relates to a motor encoder, which comprises a circuit board, a magnet, a magnet seat and a support, the circuit board is coaxially arranged on the support, the circuit board and the support form a containing space, the magnet seat and the magnet are arranged in the containing space, and the magnet is coaxially arranged at one end of the magnet seat; the support comprises a groove and at least one supporting column, the groove is arranged at the center of the upper end surface of the support, and the at least one supporting column is arranged around the inside of the groove; the magnet seat and the motor shaft are in interference fit.

7. The servomotor of claim 6, wherein One end of the motor shaft is provided with a boss structure, and the boss structure is in direct contact with the bottom end of the magnet seat.

8. The servomotor of claim 7, wherein ​

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