Novel encoder

Abstract

The utility model discloses a novel encoder, which comprises an encoder moving disc and an encoder static disc provided with a PCB (printed circuit board), the encoder static disc is provided with a reading head electrically connected with the PCB, the encoder static disc is provided with a central through hole A, and the aperture of the central through hole A is larger than the diameter of a motor shaft. The encoder static disc is installed at the tail end of the motor shell in the using state, the encoder movable disc is installed at the tail end of the motor shaft in the using state, a gap is reserved between the encoder static disc and the encoder movable disc, and the reading head is used for detecting rotation information of the encoder movable disc. According to the utility model, the encoder static disc is directly installed at the tail part of the motor shell, no extra support for installing the encoder static disc is needed, and the encoder static disc is located between the encoder dynamic disc and the motor, thereby reducing the occupied space of the encoder, reducing the length of the motor on the whole, reducing the occupied space when the servo motor is used, and improving the service life of the servo motor. And meanwhile, an encoder static disc bracket is not arranged, so that the cost of the encoder is reduced.

Description

Technical Field

[0001] The utility model relates to a novel encoder and belongs to the technical field of robots. Background Art

[0002] The encoder is a sensor installed on the servo motor to measure the magnetic pole position and the rotation angle and speed of the servo motor. It includes an encoder moving disk and an encoder static disk. There are two installation methods for the current encoder. One is to assemble the encoder static disk and the encoder moving disk together through a bearing to form an integral encoder, such as the encoder disclosed in the Chinese utility model patent with application publication number CN219678275U; the other is a split assembly, firstly, the independent encoder moving disk is assembled to the tail end of the motor through a bearing sleeve, and then the encoder static disk is assembled through a bracket, such as the Chinese invention patent application with application publication number CN114147770A; the encoder of the first structure has a larger overall height, while the encoder of the second structure has a larger height because the encoder static disk is separately provided to support the encoder static disk. The height of the encoder is large, and after it is installed on the servo motor, the overall length of the servo motor is larger, so that the use of the servo motor occupies a larger space. Since the existing encoder is separately provided with a bracket, the overall cost is also higher, the assembly steps are more, and the overall production efficiency is low. Summary of the invention

[0003] The utility model aims to provide a novel encoder to solve the technical defect in the prior art that the overall length of the servo motor is large due to the overall height of the encoder being large.

[0004] In order to solve the above problems, the technical solution adopted by the utility model is: a new type of encoder, including an encoder moving disk and an encoder static disk provided with a PCB circuit board, a reading head electrically connected to the PCB circuit board is provided on the encoder static disk, the encoder is installed at the rear end of the motor housing, the motor shaft of the motor extends from the rear end of the motor housing, a central through hole A for the power supply motor shaft to pass through is opened on the encoder static disk, the aperture of the central through hole A is larger than the diameter of the motor shaft, the encoder static disk is fixedly installed at the rear end of the motor housing, the motor shaft passes through the central through hole A, the encoder moving disk is installed at the rear end of the motor shaft when in use and rotates synchronously with the rotation of the motor shaft, a gap is left between the encoder moving disk and the encoder static disk, and the reading head on the encoder static disk is used to detect the rotation information of the encoder moving disk. The utility model directly installs the encoder static disk at the tail of the motor housing, and there is no need to set up an additional bracket for installing the encoder static disk. The encoder static disk is located between the encoder dynamic disk and the motor. Compared with the prior art that uses an encoder static disk bracket to support the encoder static disk, the encoder static disk and the motor are located on both sides of the encoder dynamic disk. The utility model reduces the space occupied by the encoder, thereby reducing the length of the motor as a whole, and reducing the space occupied when the servo motor is used. At the same time, since the utility model does not have an encoder static disk bracket, the utility model also reduces the cost of the encoder.

[0005] As a further improvement of the utility model, a plurality of mounting through holes are provided on the encoder stator, and mounting bolts or mounting screws matching with the motor housing threads are provided in the mounting through holes, so as to detachably mount the encoder stator on the tail end of the motor housing. The utility model adopts mounting bolts or mounting screws to directly detachably mount the encoder stator on the tail end of the motor, which facilitates the installation of the encoder stator, and the encoder stator is firmly installed.

[0006] As a further improvement of the present invention, the mounting through holes are distributed along the circumferential direction of the central through hole A. The mounting through holes of the present invention are distributed along the circumferential direction of the central through hole A, so that the force on the encoder stator is more uniform.

[0007] As a further improvement of the utility model, a central through hole B is provided on the encoder moving disk, and the encoder moving disk is pressed against the end of the motor shaft by a bolt or screw that passes through the central through hole B and is threadedly matched with the motor shaft. The utility model provides a central through hole B on the encoder moving disk, which facilitates the installation of the encoder moving disk.

[0008] As a further improvement of the utility model, the center through hole B is a stepped hole, the diameter of the center through hole B near the end of the motor shaft is greater than or equal to the diameter of the motor shaft, the diameter of the center through hole B away from the motor shaft is smaller than the diameter of the motor shaft, the end of the motor shaft extends into the end with a larger diameter of the center through hole B, and the end of the center through hole B away from the motor shaft is inserted with a bolt or screw that matches the thread of the end of the motor shaft, which is used to press the encoder moving disk to the end of the motor shaft. The utility model adopts a stepped center through hole B, and the shoulder formed at the hole diameter change position matches the end of the motor shaft, so that the encoder moving disk can be fixed more conveniently.

[0009] As a further improvement of the utility model, an annular protrusion is formed on the side of the encoder moving disk away from the encoder static disk, the center line of the annular protrusion coincides with the center line of the central through hole B, and the inner diameter of the annular protrusion is greater than the maximum width of the bolt or screw head. The utility model provides an annular protrusion on the encoder moving disk, and the bolt or screw head used to press the encoder moving disk is located in the annular protrusion, which can effectively prevent foreign matter from being entangled on the bolt or screw in use.

[0010] As a further improvement of the utility model, a groove is arranged at the rear end of the motor housing, and the encoder stator is installed in the groove. The utility model can further reduce the length of the motor by arranging the groove on the motor housing.

[0011] In summary, the beneficial effects of the utility model are: 1. The utility model reduces the overall height of the encoder, thereby shortening the overall length of the motor; 2. The utility model reduces the stator bracket of the encoder, thereby reducing the overall cost of the encoder; 3. The utility model simplifies the assembly steps of the encoder production by reducing the assembly parts, thereby improving the production efficiency of the product; 4. The encoder stator installation of the encoder of the utility model directly refers to the rear end structure of the motor, which greatly improves the concentricity and parallelism of the encoder moving disk and stator, thereby improving the overall performance of the encoder. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a front view of the utility model installed on the motor.

[0013] Figure 2 It is a three-dimensional structural schematic diagram of the utility model installed on a motor.

[0014] Figure 3 It is a three-dimensional structural schematic diagram of the utility model installed on a motor.

[0015] Among them: 1. Encoder moving disk; 2. Encoder static disk; 3. Reading head; 4. Center through hole A; 5. Motor; 6. Motor shaft; 7. Mounting through hole; 8. Mounting bolts or mounting screws; 9. Bolts or screws; 10. Annular protrusion; 11. Center through hole B; 12. Groove. DETAILED DESCRIPTION

[0016] The specific implementation of the utility model is further described below in conjunction with the accompanying drawings.

[0017] like Figures 1 to 3 The new encoder shown includes an encoder moving disk 1 and an encoder static disk 2 provided with a PCB circuit board. The encoder static disk 2 in the utility model is provided with a reading head 3 electrically connected to the PCB circuit board. The PCB circuit board and the reading head 3 are both prior arts and are not described in detail in the utility model. The encoder of the utility model is installed at the rear end of the motor housing 5 of the motor, and the motor shaft 6 of the motor extends from the rear end of the motor housing 5.

[0018] like Figures 1 to 3 As shown, the encoder stator 2 in the present invention is in the shape of a disc, and a central through hole A4 for the motor shaft 6 to pass through is provided on the encoder stator 2 along its center line, and the central through hole A4 is a circular hole, and the aperture of the central through hole A4 is larger than the diameter of the motor shaft 6. The present invention optimally sets the diameter of the central through hole A4 to be slightly larger than the diameter of the motor shaft 6, and the encoder stator 2 is fixedly mounted on the rear end of the motor housing 5, and the motor shaft 6 passes through the central through hole A4. Since the aperture of the central through hole A4 is slightly larger than the diameter of the motor shaft 6, the two do not contact each other, so when the motor shaft 6 rotates, no mutual friction with the encoder stator 2 is generated.

[0019] like Figures 1 to 3 As shown, the encoder moving disk 1 in the utility model is installed at the tail end of the motor shaft 6 when in use and rotates synchronously with the rotation of the motor shaft 6. The cross-sectional shape of the encoder moving disk 1 is circular, and the center line of the encoder moving disk 1 coincides with the center line of the motor shaft 6. A gap is left between the encoder moving disk 1 and the encoder static disk 2. In this way, when the encoder moving disk 1 rotates synchronously with the motor shaft 6, the encoder moving disk 1 and the encoder static disk 2 will not rub against each other. The reading head 3 on the encoder static disk 2 in the utility model is used to detect the rotation information of the encoder moving disk 1. This detection is also a prior art and is not described in detail in the utility model.

[0020] like Figures 1 to 3As shown, in order to facilitate the installation of the encoder stator 2, the utility model provides a plurality of mounting through holes 7 on the encoder stator 2, and mounting bolts or mounting screws 8 that cooperate with the threads of the motor housing 5 are provided in the mounting through holes 7, which are used to detachably mount the encoder stator 2 on the rear end of the motor housing 5. When installing the encoder stator 2, the mounting bolts or mounting screws 8 are inserted into the mounting through holes 7 so that the mounting bolts or mounting screws 8 can be detachably mounted on the rear end of the motor housing 5. The utility model optimally distributes the mounting through holes 7 along the circumferential direction of the central through hole A4. For example, the utility model evenly provides three mounting through holes 7 on the encoder stator 2 along the circumferential direction of the mounting through holes 7, and uses three mounting bolts or mounting screws 8 to mount the encoder stator 2 on the rear end of the motor housing 5. The utility model provides a groove 12 at the rear end of the motor housing 5, and the encoder stator 2 is installed in the groove 12 to further reduce the overall length of the motor.

[0021] like Figures 1 to 3 As shown, in order to facilitate the installation of the encoder moving plate 1 on the motor shaft 6, the utility model provides a central through hole B11 on the encoder moving plate 1, and the central through hole B11 is also a round hole. The encoder moving plate 1 is pressed against the end of the motor shaft 6 by a bolt or screw 9 that passes through the central through hole B11 and is threadedly matched with the motor shaft 6. The utility model provides a threaded blind hole at the end of the motor shaft 6, inserts the bolt or screw 9 into the central through hole B11 on the encoder moving plate 1, and makes the bolt or screw 9 threadably matched with the threaded blind hole, tightens the bolt or screw 9, and presses the encoder moving plate 1 against the end of the motor shaft 6.

[0022] like Figures 1 to 3 As shown, the central through hole B11 in the utility model is optimally set as a stepped hole, and the diameter of the central through hole B11 near the end of the motor shaft 6 is greater than or equal to the diameter of the motor shaft 6. The utility model preferably sets the aperture of the central through hole B11 near the end of the motor shaft 6 to be slightly larger than the diameter of the motor shaft 6, so as to facilitate the insertion of the motor shaft 6 into the central through hole B11, and at the same time avoid the encoder moving disk 1 from moving in the axial direction of the motor shaft 6 when the motor shaft 6 rotates. The central through hole B11 in the utility model is far away from the end of the motor shaft 6. The diameter is smaller than the diameter of the motor shaft 6, and the end of the motor shaft 6 extends into the end of the center through hole B11 with a larger diameter. The end of the motor shaft 6 rests against the shoulder of the hole between the end with a larger diameter and the end with a smaller diameter of the center through hole B11. A bolt or screw 9 threadedly matched with the end of the motor shaft 6 is inserted into the end of the center through hole B11 away from the motor shaft 6, which is used to press the encoder moving disk 1 to the end of the motor shaft 6. In the utility model, since the motor shaft 6 is inserted into the center through hole B11, the connection between the encoder moving disk 1 and the motor shaft 6 is more stable.

[0023] like Figures 1 to 3As shown, the utility model forms an annular protrusion 10 on the encoder moving disk 1 which is protruding from the side away from the encoder static disk 2. The center line of the annular protrusion 10 coincides with the center line of the center through hole B11, and the inner diameter of the annular protrusion 10 is larger than the maximum width of the head of the bolt or screw 9. When the encoder moving disk 1 is pressed against the end of the motor shaft 6, the head of the bolt or screw 9 is located in the annular protrusion 10. It should be understood that if the encoder moving disk 1 is pressed against the end of the motor shaft 6 by bolts, hexagon socket bolts are used to facilitate the tightening of the bolts.

[0024] like Figures 1 to 3 As shown, the improvement of the utility model lies in that the installation positions of the encoder moving disk 1 and the encoder static disk 2 are different from the prior art, and the specific installation methods of the encoder moving disk 1 and the encoder static disk 2 are different, while the other structures of the encoder moving disk 1 and the encoder static disk 2 themselves are all prior art. The utility model can be applied to transmission type and reflection type photoelectric encoders, as well as magnetic encoders and inductive encoders.

[0025] The parts not specifically described in the above description are all prior art, or can be implemented by prior art. Moreover, the specific implementation cases described in this utility model are only preferred implementation cases of the present invention, and are not used to limit the implementation scope of this utility model. That is, all equivalent changes and modifications made according to the content of the patent scope of this utility model should be regarded as the technical scope of this utility model.

Claims

1. A novel encoder comprises an encoder moving disk and an encoder static disk provided with a PCB circuit board, the encoder static disk is provided with a reading head electrically connected to the PCB circuit board, the encoder is installed at the rear end of a motor housing, and the motor shaft of the motor extends from the rear end of the motor housing, characterized in that: The encoder stator is provided with a central through hole A through which the motor shaft passes. The aperture of the central through hole A is larger than the diameter of the motor shaft. The encoder stator is fixedly mounted at the rear end of the motor housing, and the motor shaft passes through the central through hole A. The encoder moving disc is installed at the tail end of the motor shaft when in use and rotates synchronously with the rotation of the motor shaft. There is a gap between the encoder moving disc and the encoder static disc. The reading head on the encoder's static disk is used to detect the rotation information of the encoder's dynamic disk.

2. The novel encoder according to claim 1, characterized in that: The encoder stator is provided with a plurality of mounting through holes, and mounting bolts or mounting screws matching with the threads of the motor housing are arranged in the mounting through holes for detachably mounting the encoder stator on the rear end of the motor housing.

3. The novel encoder according to claim 2 is characterized in that: The mounting through holes are distributed along the circumferential direction of the central through hole A.

4. The novel encoder according to claim 1 is characterized in that: A central through hole B is provided on the encoder moving plate, and the encoder moving plate is pressed against the end of the motor shaft by a bolt or a screw that passes through the central through hole B and matches with the thread of the motor shaft.

5. The novel encoder according to claim 4 is characterized in that: The center through hole B is a stepped hole. The diameter of the center through hole B near the motor shaft is greater than or equal to the diameter of the motor shaft, and the diameter of the center through hole B away from the motor shaft is smaller than the diameter of the motor shaft. The end of the motor shaft extends into the end with the larger diameter of the center through hole B, and a bolt or screw that matches the thread of the end of the motor shaft is inserted into the end of the center through hole B away from the motor shaft, which is used to press the encoder moving plate to the end of the motor shaft.

6. The novel encoder according to claim 5 is characterized in that: An annular protrusion is formed on the side of the encoder moving disk away from the encoder static disk. The center line of the annular protrusion coincides with the center line of the center through hole B, and the inner diameter of the annular protrusion is larger than the maximum width of the bolt or screw head.

7. The novel encoder according to claim 1 is characterized in that: A groove is arranged at the rear end of the motor housing, and the encoder stator is installed in the groove.

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