A zero point calibration jig for a DD motor
By designing a zero-point calibration fixture for DD motors and utilizing the precise matching of the positioning seat and positioning components, the problem of inconsistent zero-point position of the motor was solved, achieving batch consistency and efficient calibration, and reducing equipment maintenance costs.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- DONGGUAN ZHIYING INTELLIGENT MANUFACTURING TECHNOLOGY CO LTD
- Filing Date
- 2025-07-31
- Publication Date
- 2026-07-07
AI Technical Summary
In the existing technology, the lack of encoder calibration leads to inconsistent zero-point positions of motors shipped in the same batch. Manual operation results in low rotational position accuracy, affecting customer usage and equipment maintenance costs.
Design a zero-point calibration fixture for a DD motor, including a positioning base, a mounting column, and a positioning assembly. The positioning part is precisely matched with the connection hole of the motor base, and the positioning pin is used to position the motor with the positioning hole of the output turntable, eliminating human error and ensuring the consistency of the motor's zero-point position.
This achieves consistency in the zero-point position of motors in the same batch, reduces equipment maintenance costs, improves zero-point calibration efficiency, and makes it easier for customers to directly replace motors.
Smart Images
Figure CN224471813U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the field of zero-point calibration fixture technology, specifically relating to a zero-point calibration fixture for a DD motor. Background Technology
[0002] The core reason for calibrating the encoder's origin is to establish an absolute reference for position control, ensuring the accuracy, stability, and safety of measurement and control. Some motor manufacturers use encoders purchased from the market. Since some encoder manufacturers haven't calibrated their own origins, motor manufacturers need to perform zero-point calibration on the encoder after assembling it on the motor. However, directly calibrating the encoder directly results in inconsistent zero-point positions across motors in the same batch, which is inconvenient for customers. Even if the motor turntable is rotated to a uniform position before zero-point calibration, the manual operation of the motor results in low positional accuracy, and the zero-point position will still have deviations. Utility Model Content
[0003] The purpose of this invention is to overcome the shortcomings of the prior art and provide a zero-point calibration fixture for a DD motor.
[0004] To achieve the above objectives, this utility model discloses a zero-point calibration fixture for a DD motor, comprising a positioning base, a mounting column, and a positioning assembly;
[0005] The positioning base has a motor positioning area, and the motor positioning area is provided with multiple positioning parts. The multiple positioning parts are configured to correspond one-to-one with and be positioned and engaged with multiple connection holes on the DD motor base.
[0006] The mounting column is vertically arranged, and its bottom is fixedly connected to the positioning seat. The mounting column is provided with a guide rail, which is arranged in the vertical direction.
[0007] The positioning component includes a slider, a connecting arm, and a positioning pin. The slider is slidably connected to the guide rail, the connecting arm is fixedly connected to the slider, and the positioning pin is fixedly connected to the connecting arm. The bottom of the positioning pin is used to engage with the positioning hole on the DD motor output turntable.
[0008] Furthermore, the slider is provided with a limiting hole, and the mounting column is provided with a limiting component. The limiting component cooperates with the limiting part to fix the slider on the guide rail.
[0009] Furthermore, the limiting component includes a limiting member and an elastic member. The limiting member is slidably connected to the mounting column in the direction of approaching and away from the limiting hole. The elastic member cooperates with the limiting member to push the limiting member to slide towards the limiting hole so that the end of the limiting member is engaged in the limiting hole.
[0010] Furthermore, the end face of the limiting member near the limiting hole is a spherical surface.
[0011] Furthermore, the positioning pin is detachably connected to the connecting arm.
[0012] Furthermore, the connecting arm is provided with a through hole, which penetrates the top and bottom surfaces of the connecting arm, and the positioning pin is slidably inserted into the through hole;
[0013] The side of the connecting arm is provided with a threaded hole, which is connected to the through hole. The bolt is threaded into the threaded hole until it abuts against the locating pin.
[0014] Furthermore, there are multiple locating pins, and at least some of the locating pins have different cross-sectional dimensions.
[0015] Furthermore, the connecting arm is detachably connected to the slider.
[0016] Furthermore, the slider is provided with a slot, and one end of the connecting arm is connected to the slot.
[0017] Furthermore, the motor positioning area is provided with multiple sets of positioning parts.
[0018] Compared with the prior art, the beneficial effects of this utility model are as follows:
[0019] The precise engagement of the positioning part on the positioning seat with the connecting hole of the DD motor base ensures that the motor is accurately fixed on the positioning seat. The positioning pin engages with the positioning hole of the output turntable, fixing the motor output turntable in the preset position. This eliminates errors caused by manually rotating the output turntable, ensuring the consistency of the zero point position of motors in the same batch. Customers can directly replace the motor without recalibrating the system, significantly reducing equipment maintenance costs, facilitating customer use, and improving zero point calibration efficiency. Attached Figure Description
[0020] Figure 1 A three-dimensional structural diagram of an existing DD motor;
[0021] Figure 2 This is a three-dimensional structural schematic diagram of the zero-point calibration fixture for an embodiment.
[0022] Figure 3 This is a front view of the zero-point calibration fixture in the embodiment;
[0023] Figure 4 for Figure 3 Sectional view of AA;
[0024] Figure 5 for Figure 4 A magnified view of a portion of point A in the middle;
[0025] Base 110; Connection hole 111; Housing 120; Output turntable 130; Positioning hole 131; Threaded hole 132; Power cord 140; Encoder cable 150;
[0026] Positioning seat 200; motor positioning area 210; positioning part 211;
[0027] Mounting column 300; guide rail 310; limiting assembly 320; limiting element 321; elastic element 322; mounting hole 330;
[0028] Positioning component 400; slider 410; limiting hole 411; slider body 412; U-shaped connector 413; connecting arm 420; through hole 421; threaded hole 422; positioning pin 430. Detailed Implementation
[0029] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the utility model will be further described in detail below with reference to the accompanying drawings and specific embodiments.
[0030] Figure 1 This is a three-dimensional structural diagram of an existing DD motor, including a base 110, a housing 120 fixed to the base 110, a stator winding and rotor disposed within the housing 120, an output turntable 130 fixed to the rotor, a power cable 140, and an encoder cable 150. The base 110 has a connection hole 111 at each of its four corners, through which the DD motor is fixed to the corresponding mounting position. The output turntable 130 has a positioning hole 131, which is used to position and engage with the load mounted on the output turntable 130, improving the installation accuracy of the load. The output turntable 130 also has other holes, which are threaded holes 132, for connecting the load.
[0031] This embodiment provides a zero-point calibration fixture for the aforementioned DD motor, see [link to documentation]. Figures 2-5 It includes a positioning base 200, a mounting column 300, and a positioning assembly 400. The positioning base 200 has a motor positioning area 210, specifically... Figure 2On the right side of the positioning base 200, the motor positioning area 210 is provided with four positioning parts 211. These four positioning parts 211 are configured to correspond one-to-one with the four connecting holes 111 on the DD motor base 110, thus fixing the DD motor onto the positioning base 200. The mounting column 300 is vertically positioned, with its bottom fixedly connected to the positioning base 200. The mounting column 300 is provided with a guide rail 310, which is vertically oriented. The positioning assembly 400 includes a slider 410, a connecting arm 420, and a positioning pin 430. The slider 410 is slidably connected to the guide rail 310 and can move up and down along the guide rail 310. The connecting arm 420 is fixedly connected to the slider 410, and the positioning pin 430 is fixedly connected to the connecting arm 420. The bottom of the positioning pin 430 is used for positioning engagement with the positioning hole 131 on the DD motor output turntable 130.
[0032] After the encoder is installed on the motor, the origin is calibrated using the program provided by the encoder supplier. During calibration, a specific structure on the output turntable 130 can be selected to form a defined relative position with a specific location on the DD motor. For example, in the DD motor described above, the turntable has only one positioning hole 131. Therefore, the relative positional relationship between the positioning hole 131 and the power line 140 is used to calibrate the origin. In other words, the origin is calibrated when the output turntable 130 rotates until the positioning hole 131 aligns with the power line 140. Therefore, in the zero-point calibration fixture described above, the positioning pin 430 is positioned opposite the power line 140 after the motor is mounted on the positioning seat 200. When calibrating the origin, the DD motor is placed on the positioning seat 200, ensuring that the four positioning parts 211 correspond one-to-one with the four connecting holes 111 of the DD motor base 110 and are properly positioned, thereby ensuring that the motor is accurately fixed on the positioning seat 200. Next, the output turntable 130 is rotated so that the positioning hole 131 aligns with the positioning pin 430. Then, the positioning assembly 400 moves downward, causing the positioning pin 430 to insert into the positioning hole 131 of the output turntable 130, thereby fixing the motor output turntable 130 in a preset position. At this time, the positioning hole 131 aligns with the power cable 140. This calibration fixture eliminates the error caused by manually rotating the output turntable 130, ensuring the consistency of the zero-point position of motors in the same batch. Customers can directly replace the motor without recalibrating the system, significantly reducing equipment maintenance costs, facilitating customer use, and improving zero-point calibration efficiency.
[0033] The positioning part 211 on the positioning seat 200 has a hole structure. The shape and size of the hole are the same as the shape and size of the motor base 110 of the base 110. After the DD motor is placed on the positioning seat 200, the positioning pin is inserted into the positioning hole 131 of the motor base 110 and the hole on the positioning seat 200 to position the motor on the positioning seat 200.
[0034] Because motors of different specifications have different sizes, the size of the motor base 110 also varies. Therefore, the corresponding positions of the connection holes 111 on the base 110 on the positioning seat 200 are different. To improve the versatility of the fixture, this embodiment provides multiple sets of positioning parts 211 on the motor positioning area 210, each set corresponding to a connection hole 111 on a motor base 110 of a specific specification. Correspondingly, the connecting arm 420 has multiple positioning pins 430, each corresponding to a positioning hole 131 on the output turntable 130 of the corresponding motor specification. Because the sizes of the positioning holes 131 on the output turntable 130 are different, the cross-sectional dimensions of the positioning pins 430 are also different.
[0035] In this embodiment, the slider 410 is provided with a limiting hole 411, and the mounting column 300 is provided with a limiting component 320. The limiting component 320 and the limiting part cooperate to fix the slider 410 on the guide rail 310. Through the cooperation of the limiting component 320 and the limiting hole 411, the positioning component 400 can be fixed at a certain height, which facilitates the positioning of the DD motor on the positioning seat 200. After the DD motor is positioned, the limiting component 320 and the limiting hole 411 are released, so that the positioning pin 430 is inserted into the positioning hole 131 of the motor output turntable 130.
[0036] The limiting component 320 includes a limiting member 321 and an elastic member 322. The mounting column 300 has a mounting hole 330. The limiting member 321 is slidably installed within the mounting hole 330, allowing it to slide towards and away from the limiting hole 411. The elastic member 322, which can be a spring, is located within the mounting hole 330 and pushes the limiting member 321 towards the limiting hole 411, causing the end of the limiting member 321 to engage with the limiting hole 411. When the slider 410 moves upward to a certain height, aligning the limiting member 321 with the limiting hole 411, the limiting member 321, under the action of the elastic member 322, inserts into the limiting hole 411, thereby limiting the slider 410 and keeping it fixed for positioning the DD motor. After positioning, pushing the slider 410 downward causes it to push the elastic member 322 back, thus releasing the limiting member 321 and the limiting hole 411.
[0037] Among them, the end face of the limiting member 321 near the limiting hole 411 is a spherical surface, and the corresponding shape of the limiting hole 411 is hemispherical or near-hemispherical, which facilitates the release of the limiting fit between the limiting member 321 and the limiting hole 411.
[0038] In this embodiment, the positioning pin 430 is detachably connected to the connecting arm 420. Specifically, the connecting arm 420 has a through hole 421 that penetrates the top and bottom surfaces of the connecting arm 420, and the positioning pin 430 is slidably inserted into the through hole 421. The side of the connecting arm 420 has a threaded hole 422 that connects to the through hole 421, and a bolt is threaded into the threaded hole 422 until it abuts against the positioning pin 430. This connection structure of the positioning pin 430 is simple and easy to assemble, maintain, and replace.
[0039] In this embodiment, the slider 410 includes a slider body 412 and a U-shaped connector 413. The slider body 412 is slidably connected to the guide rail 310. The opening of the U-shaped connector 413 faces the guide rail 310, and its middle position is fixedly connected to the slider body 412. The U-shaped connector 413 is provided with the aforementioned limiting hole 411 on its side near the guide rail 310. The connecting arm 420 is fixedly connected to the U-shaped connector 413.
[0040] The U-shaped connector 413 has a slot, and one end of the connecting arm 420 is connected to the slot and fastened to the U-shaped connector 413 with bolts. The slot and the connecting arm 420 are designed to fit together, which improves the assembly stability of the connecting arm 420.
[0041] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating this utility model, and are not intended to limit the implementation of this utility model. Those skilled in the art can make other variations or modifications based on the above description. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of the claims of this utility model.
Claims
1. A zero-point calibration fixture for a DD motor, characterized in that: Includes positioning base, mounting column and positioning components; The positioning base has a motor positioning area, and the motor positioning area is provided with multiple positioning parts. The multiple positioning parts are configured to correspond one-to-one with and be positioned and engaged with multiple connection holes on the DD motor base. The mounting column is vertically arranged, and its bottom is fixedly connected to the positioning seat. The mounting column is provided with a guide rail, which is arranged in the vertical direction. The positioning component includes a slider, a connecting arm, and a positioning pin. The slider is slidably connected to the guide rail, the connecting arm is fixedly connected to the slider, and the positioning pin is fixedly connected to the connecting arm. The bottom of the positioning pin is used to engage with the positioning hole on the DD motor output turntable.
2. The zero-point calibration fixture for a DD motor according to claim 1, characterized in that: The slider is provided with a limiting hole, and the mounting column is provided with a limiting component. The limiting component cooperates with the limiting part to fix the slider on the guide rail.
3. The zero-point calibration fixture for the DD motor according to claim 2, characterized in that: The limiting component includes a limiting member and an elastic member. The limiting member is slidably connected to the mounting column in the direction of approaching and away from the limiting hole. The elastic member cooperates with the limiting member to push the limiting member to slide towards the limiting hole so that the end of the limiting member is engaged in the limiting hole.
4. The zero-point calibration fixture for the DD motor according to claim 3, characterized in that: The end face of the limiting member near the limiting hole is a spherical surface.
5. The zero-point calibration fixture for a DD motor according to claim 1, characterized in that: The positioning pin is detachably connected to the connecting arm.
6. The zero-point calibration fixture for a DD motor according to claim 5, characterized in that: The connecting arm is provided with a through hole, which penetrates the top and bottom surfaces of the connecting arm, and the positioning pin is slidably inserted into the through hole; The side of the connecting arm is provided with a threaded hole, which is connected to the through hole. The bolt is threaded into the threaded hole until it abuts against the locating pin.
7. The zero-point calibration fixture for a DD motor according to claim 1, characterized in that: There are multiple locating pins, and at least some of the locating pins have different cross-sectional dimensions.
8. The zero-point calibration fixture for a DD motor according to claim 1, characterized in that: The connecting arm is detachably connected to the slider.
9. The zero-point calibration fixture for a DD motor according to claim 1, characterized in that: The slider is provided with a slot, and one end of the connecting arm is connected to the slot.
10. The zero-point calibration fixture for a DD motor according to claim 1, characterized in that: The motor positioning area is provided with multiple sets of positioning parts.