Mounting tool of encoder

Abstract

The utility model relates to an encoder installation tool comprising a positioning mechanism, the front end face of which is provided with an accommodating groove used for accommodating an inserted motor shaft, and the front end of the positioning mechanism is also used for being detachably and fixedly connected with an encoder rotor sleeving the motor shaft so as to fixedly install the encoder rotor on the motor shaft at the rear end of an encoder circuit board; the movable mechanism is arranged at the rear end of the positioning mechanism and movably connected with the positioning mechanism, and the front end of the movable mechanism is used for abutting against the tail end of the motor shaft so as to determine the axial installation position of the encoder rotor; and the limiting mechanism is used for limiting relative movement of the positioning mechanism and the movable mechanism. Based on the structure, the axial installation position of the encoder rotor can be accurately positioned, multiple times of use can be realized only through one-time positioning, and the installation efficiency is greatly improved.

Description

Technical Field

[0001] This application relates to the field of encoder technology, and more specifically to an encoder mounting fixture. Background Technology

[0002] Encoders, also known as angular velocity or angular displacement sensors, are among the most widely used sensors, especially in closed-loop control, where they have become important speed and position feedback sensors for motors.

[0003] Accurately positioning the encoder rotor's axial installation position is crucial for encoders. For example, during encoder operation, the sensing units on its circuit board (such as magnetoresistive or photosensitive elements) need to maintain a set distance from the sensing element on the encoder rotor. This distance, also known as the sensing distance, is determined by the electrical characteristics of the sensing device to achieve precise detection. However, current encoder installation processes still struggle to accurately position the encoder rotor's axial installation position, thus failing to accurately determine the aforementioned sensing distance and resulting in low detection accuracy. Summary of the Invention

[0004] In view of the above, the first aspect of this application provides an encoder mounting fixture, which aims to solve the problem of difficulty in accurately positioning the axial mounting position of the encoder rotor in existing encoder mounting fixtures. The mounting fixture includes: a positioning mechanism with a receiving groove on its front end face for receiving an inserted motor shaft, the front end of the positioning mechanism being detachably fixedly connected to the encoder rotor sleeved on the motor shaft, so as to fix the encoder rotor on the motor shaft at the rear end of the encoder circuit board; a movable mechanism disposed at the rear end of the positioning mechanism and movably connected to the positioning mechanism, the front end of the movable mechanism being used to abut against the end of the motor shaft to determine the axial mounting position of the encoder rotor; and a limiting mechanism for limiting the relative movement of the positioning mechanism and the movable mechanism.

[0005] Preferably, the installation fixture further includes a limiting block, the height of which is equal to the preset spacing, the front end face of which is used to abut against the rear end face of the encoder circuit board, and the rear end face of which is used to abut against the front end face of the encoder rotor.

[0006] Preferably, the side wall of the limiting block is provided with a limiting groove, which penetrates the front and rear end faces of the limiting block and is used to at least partially accommodate the motor shaft.

[0007] Preferably, the movable mechanism or the positioning mechanism is provided with scale lines, and the movable mechanism determines the scale line value corresponding to the encoder rotor being in the axial installation position according to a preset interval.

[0008] Preferably, the bottom surface of the receiving groove is provided with a first threaded hole, and the movable mechanism is a screw that passes through the first threaded hole.

[0009] Preferably, the limiting mechanism includes a fixing nut, which is sleeved on the portion of the screw located at the rear end of the positioning mechanism. The fixing nut is used to abut against the positioning mechanism to lock the positioning mechanism.

[0010] Preferably, the screw has a threaded section at the front end and a limiting section at the rear end, the diameter of the limiting section being larger than the diameter of the threaded section, so as to prevent the positioning mechanism from disengaging from the rear end of the screw.

[0011] Preferably, the sidewall of the limiting segment is provided with multiple grooves circumferentially.

[0012] Preferably, the front end face of the positioning mechanism is further provided with a mounting groove for accommodating the encoder rotor. The side wall of the encoder rotor is provided with a second threaded hole, and the side wall of the mounting groove is provided with a mounting hole corresponding to the position of the second threaded hole. The mounting hole is used to fix the encoder rotor and the positioning mechanism by engaging with the second threaded hole through a set screw.

[0013] Preferably, the encoder is a magnetic encoder, and the front end of the positioning mechanism is provided with a magnet or iron block for magnetic attraction and fixation with the encoder rotor.

[0014] The encoder installation fixture provided in this application pre-fixes the encoder rotor to the positioning mechanism and pushes the movable mechanism until its front end abuts against the end of the motor shaft, thus determining the axial installation position of the encoder rotor. This achieves high positioning accuracy and allows for multiple uses with only one positioning step, significantly improving installation efficiency. Furthermore, based on the above solution, when replacing encoders or motor shafts of different specifications, only the above positioning process needs to be repeated once for re-fitting and installation, offering high flexibility. Attached Figure Description

[0015] Figure 1 A schematic diagram of the encoder mounting fixture provided in the embodiments of this application;

[0016] Figure 2 A schematic diagram of the usage state structure of the encoder mounting fixture provided in the embodiments of this application;

[0017] Figure 3 A cross-sectional structural diagram of the encoder mounting fixture provided in the embodiments of this application, showing its usage state;

[0018] Figure 4 This is a schematic diagram of the positioning mechanism provided in an embodiment of this application.

[0019] Explanation of reference numerals in the attached figures:

[0020] 11-Positioning mechanism, 12-Moving mechanism, 13-Fixing nut, 14-Limiting block, 15-Setting screw, 21-Motor shaft, 31-Encoder rotor, 32-Encoder circuit board, 111-Receiving groove, 112-First threaded hole, 113-Mounting groove, 114-Mounting hole, 121-Threaded section, 141-Limiting groove, 122-Limiting section, 123-Groove, 311-Second threaded hole, 321-Sensing unit. Detailed Implementation

[0021] The present application will now be described in further detail with reference to the accompanying drawings and specific embodiments. Similar elements in different embodiments are referred to by related similar element reference numerals. In the following embodiments, many details are described to facilitate a better understanding of the present application. However, those skilled in the art will readily recognize that some features may be omitted in different situations, or may be replaced by other elements, materials, or methods. In some cases, certain operations related to the present application are not shown or described in the specification. This is to avoid obscuring the core parts of the present application with excessive description. For those skilled in the art, detailed description of these related operations is not necessary; they can fully understand the related operations based on the description in the specification and general technical knowledge in the art.

[0022] Furthermore, the features, operations, or characteristics described in the specification can be combined in any suitable manner to form various embodiments. At the same time, the steps or actions in the method description can be rearranged or adjusted in a manner obvious to those skilled in the art. Therefore, the various orders in the specification and drawings are only for the clear description of a particular embodiment and do not imply a necessary order, unless otherwise stated that a particular order must be followed.

[0023] The serial numbers assigned to components in this document, such as "first" and "second," are used only to distinguish the described objects and have no sequential or technical meaning. The terms "connection" and "linkage" used in this application, unless otherwise specified, include both direct and indirect connections (linkages).

[0024] Please see Figures 1 to 4This application provides an encoder mounting fixture, which includes a positioning mechanism 11, a movable mechanism 12, and a limiting mechanism for restricting the relative movement of the positioning mechanism 11 and the movable mechanism 12. The front end face of the positioning mechanism 11 is provided with a receiving groove 111 for accommodating an inserted motor shaft 21. The front end of the positioning mechanism 11 is also detachably fixedly connected to an encoder rotor 31 sleeved on the motor shaft 21, so as to fix the encoder rotor 31 onto the motor shaft 21 located at the rear end of the encoder circuit board 32. The movable mechanism 12 is disposed at the rear end of the positioning mechanism 11 and movably connected to the positioning mechanism 11. The front end of the movable mechanism 12 abuts against the end of the motor shaft 21 to determine the axial mounting position of the encoder rotor 31.

[0025] It should be understood that the term "front end" in this application refers to the end closest to the motor output shaft in the axial direction of the motor, and the term "rear end" or "end end" in this application refers to the end furthest from the motor output shaft in the axial direction of the motor.

[0026] According to the encoder installation fixture provided in this application embodiment, the axial installation position of the encoder rotor 31 is determined by pre-fixing the encoder rotor 31 to the positioning mechanism 11 and pushing the movable mechanism 12 until its front end abuts against the end of the motor shaft 21. This achieves high positioning accuracy and allows for multiple uses with only one positioning step, greatly improving installation efficiency. Furthermore, based on the above solution, when replacing encoders or motor shafts of different specifications, the above positioning process only needs to be repeated once for re-fitting and installation, offering high flexibility.

[0027] As one example, such as Figures 1-3 As shown, the above-mentioned installation fixture also includes a limiting block 14. The height of the limiting block 14 is equal to the preset spacing. The front end face of the limiting block 14 is used to abut against the rear end face of the encoder circuit board 32, and the rear end face of the limiting block 14 is used to abut against the front end face of the encoder rotor 31.

[0028] It should be understood that the preset spacing refers to the distance between the encoder rotor 31 and the encoder circuit board 32, which is set according to actual needs. As an example, this distance can be the sensing distance of the sensing unit 321 of the encoder circuit board 32.

[0029] Specifically, such as Figure 3As shown, when installing the encoder, first fix the encoder circuit board 32 onto the encoder bracket or the rear end cover of the motor, and place the limiting block 14 on the rear end face of the encoder circuit board 32 near the motor shaft 21. Fix the encoder rotor 31 to the front end of the positioning mechanism 11, and then fit the positioning mechanism 11 and the encoder rotor 31 together onto the motor shaft 21, making the front end face of the encoder rotor 31 abut against the rear end face of the limiting block 14. At this time, the distance between the encoder rotor 31 and the encoder circuit board 32 is the sensing distance, and the axial position of the encoder rotor 31 is its installation position. Push the movable mechanism 12 until its front end abuts against the end of the motor shaft 21 and lock the position using the limiting mechanism. At this time, the axial installation position of the encoder rotor 31 is locked, and fixing the encoder rotor 31 to the motor shaft 21 completes the installation. When installing another encoder of the same specification, since the shaft extension length of the motor shaft 21 (the length of the motor shaft extending beyond the encoder circuit board) and the sensing distance are the same, it is only necessary to fix the encoder rotor 31 to be installed in the original fixed position of the positioning mechanism 11 and fit it onto the motor shaft 21 together with the positioning mechanism 11. At this time, the axial position of the encoder rotor 31 is its installation position, and there is no need to adjust the movable mechanism 12 again. This achieves one-time positioning and multiple uses, greatly improving installation efficiency. In addition, when changing to encoders or motor shafts of different specifications, it is only necessary to replace the above-mentioned positioning block 14 and repeat the above positioning process to adapt and install again, which is highly flexible. Specifically, as shown in the figure... Figure 3 As shown, the side wall of the aforementioned limiting block 14 may be provided with a limiting groove 141, which penetrates the front and rear end faces of the limiting block 14 and is used to at least partially accommodate the motor shaft 21. By providing the limiting groove 141, the limiting block 14 can be made as close as possible to the motor shaft 21, thereby fully abutting against the encoder rotor 31 and improving positioning accuracy.

[0030] As another example, the movable mechanism 12 or the positioning mechanism 11 is provided with scale lines, and the movable mechanism 12 determines the scale line value corresponding to the encoder rotor being in the axial installation position according to a preset interval.

[0031] It is understandable that, since the scale lines are set and the preset spacing, shaft extension length and the height of the first threaded hole 112 can be known in advance, the scale line value on the corresponding scale line of the positioning mechanism 11 or the movable mechanism when the encoder rotor 31 is in the axial installation position can be calculated. By pushing the movable mechanism 12 to align with the scale line value, the axial installation position of the encoder rotor 31 can be positioned without the need for positioning blocks, thus further improving installation efficiency.

[0032] As one example, such as Figure 3As shown, the bottom surface of the receiving groove 111 of the positioning mechanism 11 is provided with a first threaded hole 112, and the movable mechanism 12 is a screw that passes through the first threaded hole 112. Through the cooperation between the threaded hole and the screw, a limit position can be formed in real time, further improving the installation efficiency.

[0033] It is understood that the movement of the aforementioned active mechanism 12 can also be achieved by other means such as cylinders or pistons, and this application does not limit this.

[0034] As one example, such as Figure 2 As shown, the limiting mechanism also includes a fixing nut 13, which is sleeved on the portion of the screw located at the rear end of the positioning mechanism 11. The fixing nut 13 is used to abut against the positioning mechanism 11 to lock the positioning mechanism. By fixing the screw 13 against the positioning mechanism 11 and locking it, the stability of the limiting can be improved.

[0035] As one example, such as Figure 3 As shown, the screw has a threaded section 121 at the front end and a limiting section 122 at the rear end. The diameter of the limiting section 122 is larger than the diameter of the threaded section 121 to prevent the positioning mechanism 11 from disengaging from the rear end of the screw.

[0036] As one example, such as Figure 2 and Figure 3 As shown, the sidewall of the limiting segment 122 is provided with a plurality of grooves 123 circumferentially. The arrangement of the plurality of grooves 123 can significantly improve the friction during twisting and prevent slippage.

[0037] As one example, such as Figure 3 and Figure 4 As shown, the front end face of the positioning mechanism 11 is also provided with a mounting groove 113, which is used to accommodate the encoder rotor 31. The side wall of the encoder rotor 31 is provided with a second threaded hole 311. The side wall of the mounting groove 113 is provided with a mounting hole 114 corresponding to the position of the second threaded hole 311. The mounting hole 114 is used to cooperate with the second threaded hole 311 through a set screw 15 to fix the encoder rotor 31 and the positioning mechanism 11.

[0038] Specifically, three second threaded holes 311 are evenly arranged circumferentially on the side wall of the encoder rotor 31. Correspondingly, three mounting holes 114 are also evenly arranged circumferentially on the side wall of the mounting groove 113. During installation, the encoder rotor 31 and the positioning mechanism 11 are pre-fixed by screwing the set screw 15 into the second threaded hole 311 from the outside (partially located inside the mounting hole 114). After the encoder rotor 31 and the positioning mechanism 11 are fitted onto the motor shaft 21 and positioned in the axial installation position, the set screw 15 is continued to be screwed in until the inner end of the set screw 15 passes through the second threaded hole 311 and abuts against the motor shaft 21, thus completing the installation of the encoder rotor 31. The installation by fixing with set screws is convenient and has high positional accuracy.

[0039] As another example, such as Figure 3 As shown, the encoder to be installed is a magnetic encoder. The positioning mechanism 11 has a magnet or iron block at its front end for magnetically fixing it to the encoder rotor 31. It can be understood that since the encoder rotor of a magnetic encoder itself contains permanent magnets, adding a magnet or iron block to the front end of the positioning mechanism 11 can achieve magnetic fixing, which simplifies the structure and provides high positional accuracy.

[0040] It should be understood that the specific examples used above to illustrate this application are only for the purpose of helping to understand this application and are not intended to limit this application. For those skilled in the art to which this application pertains, based on the ideas of this application, several simple deductions, modifications, or substitutions can be made.

Claims

1. An encoder mounting fixture, characterized in that, include: The positioning mechanism has a receiving groove on its front end face for receiving the inserted motor shaft. The front end of the positioning mechanism is also used to detachably and fixedly connect with the encoder rotor sleeved on the motor shaft, so as to fix the encoder rotor on the motor shaft at the rear end of the encoder circuit board. An active mechanism is disposed at the rear end of the positioning mechanism and is movably connected to the positioning mechanism. The front end of the active mechanism is used to abut against the end of the motor shaft to determine the axial installation position of the encoder rotor. A limiting mechanism is used to restrict the relative movement between the positioning mechanism and the moving mechanism.

2. The installation fixture as described in claim 1, characterized in that, The installation fixture also includes a limiting block, the height of which is equal to the preset spacing. The front end face of the limiting block is used to abut against the rear end face of the encoder circuit board, and the rear end face of the limiting block is used to abut against the front end face of the encoder rotor fixed to the positioning mechanism.

3. The installation fixture as described in claim 2, characterized in that, The side wall of the limiting block is provided with a limiting groove, which penetrates the front and rear end faces of the limiting block and is used to at least partially accommodate the motor shaft.

4. The installation fixture as described in claim 1, characterized in that, The movable mechanism or the positioning mechanism is provided with scale lines, and the movable mechanism determines the scale line value corresponding to the encoder rotor being in the axial installation position according to the preset spacing.

5. The installation fixture as described in any one of claims 1-4, characterized in that, The bottom surface of the receiving groove is provided with a first threaded hole, and the movable mechanism is a screw that passes through the first threaded hole.

6. The installation fixture as described in claim 5, characterized in that, The limiting mechanism includes a fixing nut, which is sleeved on the portion of the screw located at the rear end of the positioning mechanism. The fixing nut is used to abut against the positioning mechanism to lock the positioning mechanism.

7. The installation fixture as described in claim 5, characterized in that, The screw has a threaded section at the front end and a limiting section at the rear end, the diameter of which is larger than the diameter of the threaded section, to prevent the positioning mechanism from disengaging from the rear end of the screw.

8. The installation fixture as described in claim 7, characterized in that, The sidewall of the limiting section is provided with multiple grooves in a circumferential manner.

9. The installation fixture as described in any one of claims 1-4, characterized in that, The front end face of the positioning mechanism is also provided with a mounting groove, which is used to accommodate the encoder rotor. The side wall of the encoder rotor is provided with a second threaded hole, and the side wall of the mounting groove is provided with a mounting hole corresponding to the position of the second threaded hole. The mounting hole is used to fix the encoder rotor and the positioning mechanism by engaging with the second threaded hole through a set screw.

10. The installation fixture as described in any one of claims 1-4, characterized in that, The encoder is a magnetic encoder, and the front end of the positioning mechanism is provided with a magnet or iron block for magnetic attraction and fixation with the encoder rotor.

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