Dismounting tool for motor encoder
By designing a motor encoder disassembly fixture, the encoder can be disassembled without damage by using the tensioning part and adjusting part on the plug rod. This solves the problem of the encoder being difficult to disassemble due to interference fit with the shaft, and achieves non-destructive disassembly and high efficiency adaptability.
Patent Information
- Application Number
- CN202520134032.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-01-20
- Publication Date
- 2026-01-06
- Estimated Expiration
- 2035-01-20
AI Technical Summary
In the existing technology, the interference fit between the encoder and the shaft makes it difficult to disassemble without damage, and conventional tools can easily damage the encoder.
A disassembly fixture for a motor encoder was designed. By using the tensioning part and adjusting part on the plug rod, the tensioning part can be interference-fitted with the inner hole of the encoder. By changing the outer diameter, it can be tightly fitted with the inner hole, thus achieving non-destructive disassembly.
It enables non-destructive disassembly of encoders, adapts to different inner diameters, reduces equipment maintenance costs, and improves disassembly efficiency and the applicability of tooling.
Smart Images
Figure CN223763141U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of motor technology, and in particular to a disassembly fixture for a motor encoder. Background Technology
[0002] The rotor of the bearingless motor consists of a shaft, a rotor core mounted on the shaft, and multiple magnets disposed within the rotor core. An encoder 20 is also mounted on the shaft 10 (see [link to relevant documentation]). Figure 2 The encoder is used for real-time feedback of shaft direction, speed control, and torque control. However, when encoder digital readings are inaccurate, signals are lost, or output signals are unstable, affecting the normal control and operation of the motor, or when in-depth maintenance or troubleshooting of the motor is required, the encoder must be disassembled. When the encoder and shaft are connected by an interference fit, high machining accuracy is required for both. If conventional three-jaw or four-jaw puller is used for disassembly, the jaws can easily damage the encoder. Therefore, a disassembly fixture suitable for encoders on motor shafts needs to be developed to remove the encoder without damage. Utility Model Content
[0003] In view of the shortcomings of the prior art, the purpose of this utility model is to provide a disassembly fixture for a motor encoder, which aims to use a tensioning part with a variable outer diameter and an adjusting part on the insertion rod to allow the tensioning part to be inserted into the inner hole of the encoder while also having an interference fit with the inner hole of the encoder, thereby achieving non-destructive disassembly of the encoder.
[0004] To achieve the above objectives, the present invention adopts the following technical solution:
[0005] A disassembly fixture for a motor encoder includes a plug rod and a handle connected to the end of the plug rod; the front end of the plug rod is provided with a tensioning part, the tensioning part is used to insert into the inner hole of the encoder, the tensioning part is provided with an adjusting member for expanding the outer radial direction of the tensioning part outward or contracting inward, and the outer peripheral wall of the tensioning part is used to fit tightly against the hole wall of the encoder's inner hole.
[0006] The disassembly fixture for the motor encoder includes a tensioning part that is a transverse groove at the front end of the insertion rod, the transverse groove extending in the same direction as the insertion rod, and one end of the transverse groove penetrating the front end of the insertion rod; the adjusting member is an adjusting rod with threads on its body, the insertion rod having a threaded hole, the adjusting rod being threadedly connected to the threaded hole, and the body of the adjusting rod being located in the transverse groove.
[0007] The disassembly fixture for the motor encoder is provided with a plurality of anti-slip rings at the front end of the insertion rod, the anti-slip rings being used to abut against the wall of the encoder's inner hole.
[0008] The disassembly fixture for the motor encoder is provided in which the front end of the insertion rod is provided with multiple spaced annular grooves, and multiple anti-slip rings are located in the corresponding annular grooves.
[0009] The disassembly fixture for the motor encoder is wherein the extension direction of the handle is perpendicular to the extension direction of the insertion rod.
[0010] The disassembly fixture for the motor encoder has a socket at the end of the handle.
[0011] Beneficial effects:
[0012] This invention provides a disassembly fixture for a motor encoder. Utilizing a tensioning part with a variable outer diameter and an adjusting component on the insertion rod, the tensioning part can be inserted into the encoder's inner hole while simultaneously achieving an interference fit. The structure is simple and easy to use. Furthermore, during disassembly, the tensioning part is fixed to the encoder's inner hole through uniform contact with its outer peripheral wall, achieving non-destructive disassembly of the encoder. In addition, since the outer diameter of the tensioning part can be adjusted via the adjusting component, this fixture can accommodate encoder inner holes of different inner diameters. Attached Figure Description
[0013] Figure 1 This is a schematic diagram of the disassembly fixture for a motor encoder.
[0014] Figure 2 This is a diagram showing the usage status of the disassembly tooling for the motor encoder.
[0015] Explanation of main component symbols: 1-insertion rod, 11-tensioning part, 111-horizontal groove, 112-threaded hole, 12-adjusting part, 13-anti-slip ring, 2-handle, 21-insertion hole;
[0016] 10 - Rotary shaft, 20 - Encoder. Detailed Implementation
[0017] This utility model provides a disassembly fixture for a motor encoder. To make the purpose, technical solution, and effects of this utility model clearer and more explicit, the following describes this utility model in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain this utility model and are not intended to limit the scope of protection of this utility model.
[0018] Please see Figures 1-2This utility model provides a disassembly fixture for a motor encoder, including a plug rod 1 and a handle 2 connected to the end of the plug rod 1; the front end of the plug rod 1 is provided with a tensioning part 11, the tensioning part 11 is used to insert into the inner hole of the encoder 20, the tensioning part 11 is provided with an adjusting member 12 for expanding the outer radial direction of the tensioning part 11 outward or contracting inward, and the outer peripheral wall of the tensioning part 11 is used to fit tightly against the hole wall of the inner hole of the encoder 20.
[0019] In practical applications, the inner hole of encoder 20 is interference-fitted with the end of shaft 10, and there is still some clearance in the inner hole. When it is necessary to disassemble encoder 20, tensioning part 11 is inserted into the inner hole of encoder 20. Using adjusting part 12, the outer diameter of tensioning part 11 is changed, so that tensioning part 11 can be smoothly inserted into the inner hole. Moreover, after insertion, the outer peripheral wall of tensioning part 11 can be interference-fitted with the hole wall of the inner hole. Thus, the encoder 20 can be pulled out from the end of shaft 10 by pulling handle 2 outward.
[0020] In the aforementioned disassembly fixture, the adjustable outer diameter of the tensioning part 11 and the adjusting element 12 on the insertion rod 1 allows the tensioning part 11 to be inserted into the inner hole of the encoder 20 while also achieving an interference fit with the inner hole of the encoder 20. This design is simple and easy to use. Furthermore, during disassembly, the tensioning part 11 is fixed to the inner hole of the encoder 20 by uniformly abutting against its outer peripheral wall. Compared to some disassembly methods that may cause localized stress concentration in the internal structure of the encoder 20, this method can more evenly distribute the tension, preventing damage to internal components of the encoder 20 due to excessive localized stress. In addition, since the outer diameter of the tensioning part 11 can be adjusted by the adjusting element 12, this fixture can adapt to encoder 20 inner holes of different inner diameters. Whether the encoder 20 is small or large, disassembly can be successfully completed using this fixture without the need for multiple specialized disassembly tools for different encoder 20 specifications. This effectively reduces equipment maintenance costs, increases the applicability of the fixture, and can even be used for, for example, the disassembly of bearings.
[0021] In some embodiments, the tensioning part 11 is a transverse groove 111 formed at the front end of the insertion rod 1. The transverse groove 111 extends in the same direction as the insertion rod 1, and one end of the transverse groove 111 passes through the front end of the insertion rod 1. The adjusting member 12 is an adjusting rod with threads on its body. The insertion rod 1 has a threaded hole 112. The adjusting rod is threadedly connected to the threaded hole 112, and the body of the adjusting rod is located in the transverse groove 111.
[0022] When it is necessary to disassemble the encoder 20, first align and insert the tensioning part 11 with the transverse groove 111 at the front end of the insertion rod 1 into the inner hole of the encoder 20. Since one end of the transverse groove 111 passes through the front end of the insertion rod 1, the tensioning part 11 has a certain elastic deformation capability. Next, by rotating the adjusting rod, because the adjusting rod is threadedly connected to the threaded hole 112 on the insertion rod 1 and the rod body is located in the transverse groove 111, it moves axially within the threaded hole 112 as the adjusting rod rotates. When the adjusting rod moves deeper into the transverse groove 111, it will open the insertion rod 1 on both sides of the transverse groove 111, causing the outer radial direction of the tensioning part 11 to expand outward until it is tightly abutting against the inner wall of the encoder 20. At this time, pull the handle 2 outward, and the insertion rod 1 and the encoder 20 will achieve a stable connection through the friction between the tensioning part 11 and the inner wall of the hole, so that the encoder 20 can be smoothly pulled out from the end of the rotating shaft 10.
[0023] The tensioning part 11 adopts a design with a transverse groove 111 on the insertion rod 1. The adjusting part 12 is a common hexagonal screw. The overall structure is not complex, the manufacturing difficulty is low, and the required material and processing costs are low, which is conducive to large-scale production and widespread application. The outer diameter change of the tensioning part 11 is controlled by a threaded screw. The self-locking characteristic of the thread ensures that the adjusted position is stably maintained and will not easily loosen. Moreover, the expansion degree of the tensioning part 11 can be precisely controlled by the precise amount of thread rotation, ensuring good fit with the inner hole of the encoder 20 with different inner diameters, and ensuring the stability and reliability of the disassembly process. This simple structural design makes it convenient to repair and replace parts if they are damaged during use. For example, when the adjusting rod is worn or damaged, it can be easily unscrewed from the threaded hole 112 and replaced without causing a significant impact on other parts of the tooling, reducing maintenance costs and time.
[0024] In some embodiments, the front end of the insertion rod 1 is further provided with multiple anti-slip rings 13, which are used to abut against the wall of the inner hole of the encoder 20. When the tensioning part 11 expands to abut against the wall of the inner hole of the encoder 20, the special texture or material on the surface of the anti-slip ring 13 can effectively increase the friction between it and the hole wall. In addition, the anti-slip ring 13 is usually made of a relatively soft but wear-resistant material, such as rubber. When in contact with the wall of the inner hole of the encoder 20, it can play a buffering role, avoiding direct hard friction between the insertion rod 1 and the inner hole wall, reducing scratching and wear on the inner hole wall, and protecting the surface accuracy and integrity of the inner hole of the encoder 20.
[0025] In some embodiments, the front end of the insertion rod 1 has multiple spaced annular grooves, and multiple anti-slip rings 13 are located in the corresponding annular grooves. The annular grooves at the front end of the insertion rod 1 provide a precise installation position for the anti-slip rings 13, and the multiple spaced annular grooves allow the anti-slip rings 13 to be tightly embedded within them. During tooling use, the anti-slip rings 13 are not prone to axial or circumferential displacement. When the tensioning part 11 expands and abuts against the inner wall of the encoder 20, the anti-slip rings 13 can always remain in the predetermined position, stably playing the role of increasing friction, ensuring the reliability of the connection between the insertion rod 1 and the encoder 20, and avoiding connection instability and disassembly failure caused by the displacement of the anti-slip rings 13.
[0026] In some embodiments, the extension direction of the handle 2 is perpendicular to the extension direction of the insertion rod 1. The perpendicular extension of the handle 2 to the insertion rod 1 conforms to ergonomic principles. When actually disassembling the encoder 20, the operator can grip the handle 2 in a more natural and comfortable posture to apply force. Compared to a design where the handle 2 and insertion rod 1 are in the same direction, the vertical handle 2 allows the operator to better utilize the strength of their arms and body, and through leverage, more easily pull the handle 2 to pull the encoder 20 out from the end of the rotating shaft 10, greatly reducing the operator's physical exertion and improving work efficiency.
[0027] In some embodiments, the end of the handle 2 is provided with a socket 21. The socket 21 at the end of the handle 2 provides more possibilities for the use of the tooling. The operator can insert suitable auxiliary tools, such as extension rods, into the socket 21. When encountering situations requiring greater disassembly force, inserting an extension rod can further increase the lever arm, allowing the operator to complete the disassembly of the encoder 20 with less force, significantly improving the tooling's ability to handle different disassembly difficulty scenarios. Furthermore, the existence of the socket 21 facilitates the connection of the handle 2 with other equipment or fixing devices. For example, in some automated or semi-automated disassembly workflows, the handle 2 can be connected to automated equipment such as robotic arms through the socket 21 to achieve automated operation of the tooling.
[0028] In summary, this utility model utilizes a tensioning part 11 with a variable outer diameter and an adjusting member 12 on the insertion rod 1, allowing the tensioning part 11 to be inserted into the inner hole of the encoder 20 while also achieving an interference fit with the inner hole of the encoder 20. The structure is simple and easy to use. Furthermore, during disassembly, the tensioning part 11 is fixed to the inner hole of the encoder 20 by uniformly abutting against its outer peripheral wall, achieving non-destructive disassembly of the encoder 20. In addition, since the outer diameter of the tensioning part 11 can be adjusted by the adjusting member 12, this fixture can adapt to inner holes of encoders 20 with different inner diameters.
[0029] In the description of this utility model, 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", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.
[0030] Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first," "second," or "third" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.
[0031] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection, an electrical connection, or a connection that allows for communication; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.
[0032] It is understood that those skilled in the art can make equivalent substitutions or changes based on the technical solution and inventive concept of this utility model, and all such substitutions or changes should fall within the protection scope of this utility model.
Claims
1. A dismounting tool for an electric motor encoder, characterized in that, The utility model discloses a handle and a plug rod, the plug rod is provided with a plurality of anti-skid rings, and the anti-skid rings are arranged on the front end of the plug rod.
2. The demounting tool for an electric motor encoder according to claim 1, characterized in that, The utility model discloses a handle and a plug rod, the plug rod is provided with a plurality of anti-skid rings, and the anti-skid rings are arranged on the front end of the plug rod.
3. The demounting tool for an electric motor encoder according to claim 2, characterized in that, The utility model discloses a handle and a plug rod, the plug rod is provided with a plurality of anti-skid rings, and the anti-skid rings are arranged on the front end of the plug rod.
4. The demounting tool for an electric motor encoder according to claim 3, characterized in that, The utility model discloses a handle and a plug rod, the plug rod is provided with a plurality of anti-skid rings, and the anti-skid rings are arranged on the front end of the plug rod.
5. The demounting tool for an electric motor encoder according to claim 1, characterized in that, The utility model discloses a handle and a plug rod, the plug rod is provided with a plurality of anti-skid rings, and the anti-skid rings are arranged on the front end of the plug rod.
6. The demounting tool for an electric motor encoder according to claim 5, characterized in that, The utility model discloses a handle and a plug rod, the plug rod is provided with a plurality of anti-skid rings, and the anti-skid rings are arranged on the front end of the plug rod.