Novel frameless motor fixing device
By designing a novel frameless motor fixing device, and utilizing components such as stepped shafts and crossed roller bearings, the coaxiality adjustment process of the frameless motor is simplified, solving the problem of cumbersome operation in existing technologies and improving work efficiency.
Patent Information
- Application Number
- CN202520482475.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-19
- Publication Date
- 2026-02-17
- Estimated Expiration
- 2035-03-19
AI Technical Summary
The adjustment of coaxiality during torque testing of frameless motors requires highly skilled personnel and necessitates the use of a three-axis displacement platform, making the operation cumbersome and inconvenient.
A novel frameless motor mounting device was designed, comprising a frame, a magnetic powder brake, a dynamic torque sensor, a plum blossom coupling, and a fixing mechanism. By utilizing components such as a stepped shaft, crossed roller bearings, and a fixed base, the coaxiality adjustment process is simplified, and a stable connection of the motor is achieved through a fixed cover and an isolation column.
It simplifies the coaxiality adjustment process of frameless motors, reduces reliance on professional skills, simplifies operation steps, and improves work efficiency.
Smart Images
Figure CN223928158U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of motor technology, and in particular to a novel frameless motor fixing device. Background Technology
[0002] Frameless motors, also known as frameless torque motors, abandon the traditional frame and bearing structure. They are mainly composed of two parts: the stator and the rotor. Their operation is based on the law of electromagnetic induction: after the stator windings are energized, a rotating magnetic field is generated. This magnetic field interacts with the rotor, which has permanent magnets, so that the rotor is affected by electromagnetic force, thereby generating magnetoelectric torque to drive the rotor to rotate continuously.
[0003] In the production process of frameless motors, testing their performance using a torque testing platform is a crucial step. However, currently, most frameless motors and bearings are fixed separately, relying on a shaft to connect them. When adjusting coaxiality, shims or pads are commonly used, or a displacement platform is employed. This method requires highly skilled operators and necessitates the use of a three-axis displacement platform to adjust the coaxiality of the motor and shaft. The entire process is not only cumbersome and inconvenient to use, but also significantly reduces its practicality in real-world applications. Utility Model Content
[0004] In order to overcome the defects of the prior art mentioned above, the inventors conducted in-depth research and, after a great deal of creative work, completed this utility model.
[0005] Specifically, the technical problem to be solved by this utility model is to provide a new type of frameless motor fixing device to solve the problem that the current operation method of adjusting the coaxiality of frameless motors during torque testing requires high professional skills from the operators and also requires the use of a three-axis displacement platform to adjust the coaxiality of the motor and the shaft. The whole process is not only cumbersome to operate, but also extremely inconvenient to use.
[0006] To solve the above-mentioned technical problems, the present invention provides the following technical solution:
[0007] A novel frameless motor fixing device includes a frame, on one side of the top of the frame a magnetic powder brake is fixedly installed, the working end of the magnetic powder brake is connected to a dynamic torque sensor, the end of the dynamic torque sensor away from the magnetic powder brake is connected to a fixing mechanism through a bouton coupling, and a frameless motor is provided inside the fixing mechanism.
[0008] As an improved technical solution, the fixing mechanism includes a stepped shaft, one end of which is detachably connected to a plum blossom coupling. A fixing plate is sleeved on the outer side of the stepped shaft, and the fixing plate is fixedly installed on the top of the frame. The fixing plate is sleeved on the outer side of the stepped shaft away from the plum blossom coupling. A fixing base is sleeved on the outer side of the stepped shaft on the side of the crossed roller bearing away from the fixing plate. The frameless motor is located inside the fixing base. Isolation columns are rectangularly distributed on the side of the fixing base near the fixing plate. A fixing cover is provided on one side of the fixing base.
[0009] As an improved technical solution, the fixing cover has a circular structure, and the fixing cover has symmetrical protrusions on the side near the fixing base. The fixing cover and the fixing base are both provided with mounting holes at corresponding positions.
[0010] As an improved technical solution, the diameter of the stepped shaft gradually decreases from the end closer to the plum blossom coupling to the end farther away from the plum blossom coupling.
[0011] As an improved technical solution, the frameless motor includes a rotor arranged symmetrically in a circle, a plastic sleeve covering the outer periphery of the rotor, and a stator arranged on the outer periphery of the plastic sleeve.
[0012] As an improved technical solution, the isolation column is a hollow structure with openings at both ends. The length of the isolation column depends on the position of the rotor inner diameter in the frameless motor corresponding to the shaft diameter of the stepped shaft, and is greater than the thickness of the crossed roller bearing.
[0013] As an improved technical solution, mounting holes are provided at corresponding positions on both the fixing plate and the fixing base, and the fixing plate is L-shaped.
[0014] After adopting the above technical solution, the beneficial effects of this utility model are:
[0015] 1. This utility model uses a fixed mechanism to fix the motor, and the cross roller bearing optimizes the coaxiality adjustment, so that the coaxiality adjustment does not require an additional adjustment platform or shims, making the operation simpler and more convenient. In addition, this device reduces the equipment and process for adjusting the position of the frameless motor, saving position adjustment time and improving work efficiency.
[0016] 2. This utility model uses a plastic sleeve to prevent the rotor and stator from sticking together during installation. The thickness of the plastic sleeve is machined according to the gap between the motor rotor and stator, which ensures that the rotor and stator are symmetrical. Attached Figure Description
[0017] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. Wherein:
[0018] Figure 1 This is a schematic diagram of the overall structure of a novel frameless motor fixing device according to the present invention.
[0019] Figure 2 This is a schematic diagram of the fixing mechanism of a novel frameless motor fixing device according to this utility model.
[0020] Figure 3 This is a partially exploded structural diagram of the fixing mechanism of a novel frameless motor fixing device according to this utility model.
[0021] Figure 4 This is a schematic diagram of the fixing cover structure of a novel frameless motor fixing device according to this utility model.
[0022] Figure 5 This is a schematic diagram of the stepped shaft structure of a novel frameless motor fixing device according to this utility model.
[0023] Explanation of reference numerals in the attached figures:
[0024] 1. Frame; 2. Magnetic powder brake; 3. Dynamic torque sensor; 4. Plum blossom coupling; 5. Fixing mechanism; 6. Fixing plate; 7. Cross roller bearing; 8. Fixing base; 9. Isolation column; 10. Fixing cover; 11. Stepped shaft; 12. Frameless motor; 13. Protrusion; 14. Mounting hole one; 15. Mounting hole two. Detailed Implementation
[0025] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.
[0026] It should be noted that all directional indicators (such as up, down, left, right, front, back, etc.) in this utility model embodiment are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicator will also change accordingly.
[0027] Meanwhile, the meaning of "and / or" or "and / or" appearing throughout the text is that it includes three options. Taking "A and / or B" as an example, it includes option A, option B, or an option that satisfies both A and B.
[0028] Furthermore, in this utility model, descriptions involving "first," "second," etc., are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of that feature. Additionally, the technical solutions of the various embodiments can be combined with each other, but only on the basis of being achievable by those skilled in the art. When the combination of technical solutions is contradictory or impossible to implement, such a combination of technical solutions should be considered non-existent and not within the scope of protection claimed by this utility model.
[0029] like Figure 1 - Figure 5 As shown in the figure, this embodiment provides a novel frameless motor fixing device. The novel frameless motor fixing device includes a frame 1. A magnetic powder brake 2 is fixedly installed on one side of the top of the frame 1. A dynamic torque sensor 3 is connected to the working end of the magnetic powder brake 2. The end of the dynamic torque sensor 3 away from the magnetic powder brake 2 is connected to a fixing mechanism 5 through a plum blossom coupling 4. A frameless motor 12 is provided inside the fixing mechanism 5. In this example, the fixing mechanism 5 includes a stepped shaft 11, one end of which is detachably connected to the plum blossom coupling 4. A fixing plate 6 is sleeved on the outside of the stepped shaft 11, and the fixing plate 6 is fixedly installed on the top of the frame 1. The side of the fixing plate 6 away from the plum blossom coupling 4 is sleeved on the outside of the stepped shaft 11. A fixing base 8 is sleeved on the outside of the stepped shaft 11 on the side of the crossed roller bearing 7 away from the fixing plate 6. The frameless motor 12 is located inside the fixing base 8. Isolation columns 9 are rectangularly distributed on the side of the fixing base 8 near the fixing plate 6. A fixing cover 10 is provided on one side of the fixing base 8 to fix the frameless motor 12. The cross roller bearing 7 optimizes the coaxiality adjustment, so that the coaxiality adjustment does not require an additional adjustment platform or shims, making the operation simpler and more convenient.
[0030] In this example, the fixing cover 10 has a circular structure. The fixing cover 10 has symmetrical protrusions 13 on the side near the fixing base 8. The fixing cover 10 and the fixing base 8 are provided with mounting holes 14 at corresponding positions so that the fixing cover 10 and the fixing base 8 can be connected and fixed through the mounting holes 14. The protrusions 13 can press against the stator part of the frameless motor 12 to fix the motor.
[0031] In this example, the diameter of the stepped shaft 11 gradually decreases from the end closer to the plum blossom coupling 4 to the end farther away from the plum blossom coupling 4, so that it can be used with frameless motors 12 of various inner diameters, making its application range wider.
[0032] In this example, the isolation column 9 is a hollow structure with openings at both ends. The length of the isolation column 9 depends on the position of the inner diameter of the rotor in the frameless motor 12 corresponding to the shaft diameter of the stepped shaft 11, and is greater than the thickness of the crossed roller bearing 7, so as to support the fixed base 8 and assist the fixed base 8 in connecting with the fixed plate 6.
[0033] In this example, mounting holes 15 are provided at corresponding positions on the fixing plate 6 and the fixing base 8. The fixing plate 6 is L-shaped so that the fixing plate 6 and the fixing base 8 can be connected through the mounting holes 15.
[0034] In this example, the frameless motor 12 includes a rotor arranged symmetrically in a circle. A plastic sleeve is fitted around the outer periphery of the rotor, and a stator is arranged around the outer periphery of the plastic sleeve. In this example, the outer diameter of the stator is smaller than the inner diameter of the fixed base 8. The plastic sleeve is provided to prevent the rotor and stator from being attracted together during installation. The thickness of the plastic sleeve is processed according to the gap between the motor rotor and the stator, which ensures that the rotor and stator are symmetrical.
[0035] In use, first connect and fix the stepped shaft 11 to the crossed roller bearing 7, then install the fixed base 8, so that the isolation column 9 is placed between the fixed base 8 and the fixed plate 6. Fix the fixed base 8 to the fixed plate 6 with bolts, etc., and pass through the isolation column 9. Next, install the rotor of the frameless motor 12 onto the outer side of the stepped shaft 11 at the position corresponding to the shaft diameter, and put a custom-made plastic sleeve on the rotor of the frameless motor 12. The plastic sleeve prevents the rotor and stator of the frameless motor 12 from attracting each other during installation. The thickness of the plastic sleeve can be machined according to the gap between the rotor and stator of the frameless motor 12, thus ensuring the center symmetry of the rotor and stator. Then, place the stator of the frameless motor 12 into the fixed base 8, so that it mates with the rotor of the frameless motor 12. Since the outer diameter of the stator is smaller than the inner diameter of the device base, the outer ring of the stator and the inner wall of the fixed base 8 are... There will be a gap between the frameless motor 12 and the stepped shaft 11, so that the coaxiality of the frameless motor 12 is not affected by the installation deviation of the fixed base 8. Then, the fixed cover 10 is installed through the mounting hole 14, and the protrusion 13 on one side of the fixed cover 10 is pressed against the stator part of the frameless motor 12, so that the motor can be completely fixed. Then the plastic sleeve can be removed. Then the stepped shaft 11 can be connected to the plum blossom coupling 4 to connect with the dynamic torque sensor 3 and the magnetic powder brake 2, so that torque testing can be performed. The device fixes the frameless motor 12 through the fixing mechanism 5, and the cross roller bearing 7 optimizes the coaxiality adjustment, so that the coaxiality adjustment does not require an additional adjustment platform or shims, making the operation simpler and more convenient. Moreover, the device reduces the equipment and process for adjusting the position of the frameless motor, saving position adjustment time and improving work efficiency.
[0036] It should be understood that these embodiments are for illustrative purposes only and are not intended to limit the scope of protection of this utility model. Furthermore, it should be understood that after reading the technical description of this utility model, those skilled in the art can make various alterations, modifications, and / or variations to this utility model, and all such equivalent forms also fall within the scope of protection defined by the appended claims.
Claims
1. A novel frameless motor fixing device, comprising a frame (1), characterized in that: A magnetic powder brake (2) is fixedly installed on one side of the top of the frame (1). A dynamic torque sensor (3) is connected to the working end of the magnetic powder brake (2). A fixing mechanism (5) is connected to the end of the dynamic torque sensor (3) away from the magnetic powder brake (2) through a plum blossom coupling (4). A frameless motor (12) is provided inside the fixing mechanism (5).
2. The novel frameless motor fixing device according to claim 1, characterized in that: The fixing mechanism (5) includes a stepped shaft (11), and one end of the stepped shaft (11) is detachably connected to the plum blossom coupling (4). A fixing plate (6) is sleeved on the outside of the stepped shaft (11), and the fixing plate (6) is fixedly installed on the top of the frame (1). The fixing plate (6) is sleeved on the outside of the stepped shaft (11) on the side away from the plum blossom coupling (4). A fixing base (8) is sleeved on the outside of the stepped shaft (11) on the side away from the fixing plate (6) of the cross roller bearing (7). The frameless motor (12) is located inside the fixing base (8). Isolation columns (9) are rectangularly distributed on the side of the fixing base (8) near the fixing plate (6). A fixing cover (10) is provided on one side of the fixing base (8).
3. The novel frameless motor fixing device according to claim 2, characterized in that: The fixed cover (10) has a circular structure. The fixed cover (10) has symmetrical protrusions (13) on the side near the fixed base (8). The fixed cover (10) and the fixed base (8) are provided with mounting holes (14) at corresponding positions.
4. A novel frameless motor fixing device according to claim 3, characterized in that: The diameter of the stepped shaft (11) gradually decreases from the end near the plum blossom coupling (4) to the end away from the plum blossom coupling (4).
5. A novel frameless motor fixing device according to claim 4, characterized in that: The frameless motor (12) includes a rotor arranged symmetrically in a circle, a plastic sleeve covering the outer periphery of the rotor, and a stator arranged on the outer periphery of the plastic sleeve.
6. A novel frameless motor fixing device according to claim 5, characterized in that: The isolation column (9) is a hollow structure with openings at both ends. The length of the isolation column (9) depends on the position of the inner diameter of the rotor in the frameless motor (12) corresponding to the shaft diameter of the stepped shaft (11), and is greater than the thickness of the crossed roller bearing (7).
7. A novel frameless motor fixing device according to claim 2, characterized in that: The fixing plate (6) and the fixing base (8) are provided with mounting holes (15) at corresponding positions. The fixing plate (6) is L-shaped.